WorldWideScience

Sample records for atlast characterizing habitable

  1. Definition and Characterization of the Habitable Zone

    Science.gov (United States)

    Forget, F.; Turbet, M.; Selsis, F.; Leconte, J.

    2017-11-01

    We review the concept of habitable zone (HZ), why it is useful, and how to characterize it. The HZ could be nicknamed the "Hunting Zone" because its primary objective is now to help astronomers plan observations. This has interesting consequences.

  2. Terrestrial exoplanets: diversity, habitability and characterization

    Energy Technology Data Exchange (ETDEWEB)

    Selsis, Franck [CRAL: Centre de Recherche Astrophysique de Lyon (CNRS), Universite de Lyon, Ecole Normale Superieure de Lyon, 46 allee d' Italie, F-69007 Lyon (France); Kaltenegger, Lisa [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Paillet, Jimmy [ESTEC SCI-SA, Keplerlaan 1, PO Box 299, 2200AG Noordwijk (Netherlands)], E-mail: franck.selsis@ens-lyon.fr, E-mail: lkaltene@cfa.harvard.edu, E-mail: jpaillet@rssd.esa.int

    2008-08-15

    After a decade rich in giant exoplanet detections, observation techniques have now reached the sensitivity to gain information on the physical structure and chemical content of some of the detected planets and also to find planets of less than 10 M{sub +}. The detection and characterization of Earth-like planets is approaching rapidly and dedicated space observatories are already in operation (CoRoT) or in the development phase (Kepler, Darwin and TPF-I/C). In this paper, we explore the domain of terrestrial planets, emphasizing habitable worlds. We discuss the possibility of performing a spectral characterization of their properties using the next generation of astronomical instruments.

  3. 8 Meter Advanced Technology Large-Aperture Space Telescope (ATLAST-8m)

    Science.gov (United States)

    Stahl, H. Philip

    2010-01-01

    ATLAST-8m (Advanced Technology Large Aperture Space Telescope) is a proposed 8-meter monolithic UV/optical/NIR space observatory (wavelength range 110 to 2500 nm) to be placed in orbit at Sun-Earth L2 by NASA's planned Ares V heavy lift vehicle. Given its very high angular resolution (15 mas @ 500 nm), sensitivity and performance stability, ATLAST-8m is capable of achieving breakthroughs in a broad range of astrophysics including: Is there life elsewhere in the Galaxy? An 8-meter UVOIR observatory has the performance required to detect habitability (H2O, atmospheric column density) and biosignatures (O2, O3, CH4) in terrestrial exoplanet atmospheres, to reveal the underlying physics that drives star formation, and to trace the complex interactions between dark matter, galaxies, and intergalactic medium. The ATLAST Astrophysics Strategic Mission Concept Study developed a detailed point design for an 8-m monolithic observatory including optical design; structural design/analysis including primary mirror support structure, sun shade and secondary mirror support structure; thermal analysis; spacecraft including structure, propulsion, GN&C, avionics, power systems and reaction wheels; mass and power budgets; and system cost. The results of which were submitted by invitation to NRC's 2010 Astronomy & Astrophysics Decadal Survey.

  4. Technology Development for the Advanced Technology Large Aperture Space Telescope (ATLAST) as a Candidate Large UV-Optical-Infrared (LUVOIR) Surveyor

    Science.gov (United States)

    Bolcar, Matthew R.; Balasubramanian, Kunjithapatha; Clampin, Mark; Crooke, Julie; Feinberg, Lee; Postman, Marc; Quijada, Manuel; Rauscher, Bernard; Redding, David; Rioux, Norman; hide

    2015-01-01

    The Advanced Technology Large Aperture Space Telescope (ATLAST) team has identified five key technologies to enable candidate architectures for the future large-aperture ultraviolet/optical/infrared (LUVOIR) space observatory envisioned by the NASA Astrophysics 30-year roadmap, Enduring Quests, Daring Visions. The science goals of ATLAST address a broad range of astrophysical questions from early galaxy and star formation to the processes that contributed to the formation of life on Earth, combining general astrophysics with direct-imaging and spectroscopy of habitable exoplanets. The key technologies are: internal coronagraphs, starshades (or external occulters), ultra-stable large-aperture telescopes, detectors, and mirror coatings. Selected technology performance goals include: 1x10?10 raw contrast at an inner working angle of 35 milli-arcseconds, wavefront error stability on the order of 10 pm RMS per wavefront control step, autonomous on-board sensing & control, and zero-read-noise single-photon detectors spanning the exoplanet science bandpass between 400 nm and 1.8 µm. Development of these technologies will provide significant advances over current and planned observatories in terms of sensitivity, angular resolution, stability, and high-contrast imaging. The science goals of ATLAST are presented and flowed down to top-level telescope and instrument performance requirements in the context of a reference architecture: a 10-meter-class, segmented aperture telescope operating at room temperature (290 K) at the sun-Earth Lagrange-2 point. For each technology area, we define best estimates of required capabilities, current state-of-the-art performance, and current Technology Readiness Level (TRL) - thus identifying the current technology gap. We report on current, planned, or recommended efforts to develop each technology to TRL 5.

  5. Characterizing sleeping habits and disturbances among Saudi adults.

    Science.gov (United States)

    Al-Tannir, Mohamad; Kobrosly, Samer Y; Al-Badr, Ahmad H; Salloum, Nourhan A; Altannir, Youssef M

    2016-12-01

    To characterize sleeping habits, assess sleep disturbance prevalence, and identify associated factors among Saudi adults.  Methods: A total of 1720 adults were approached for this observational cross-sectional study between October 2014 and March 2015. The study took place in Riyadh, the capital of Saudi Arabia. We used a questionnaire to describe sleeping characteristics in relation to existing chronic diseases, smoking status, obesity, daily performance and sociodemographic variables. Results: The response rate was 79.6% (1369 participants), 61.6% have or may have sleeping disturbances of which 18.6% claimed either slowed or stopped breathing during sleep. Women reported a higher prevalence of sleep disturbances (65.2%). Feeling tired was significantly associated with sleep disturbance (49% versus 19.7%) (p greater than 0.001). Approximately 78.4% of those with sleep disturbance significantly believed that their ability to perform daily tasks is affected (p=0.005). Moreover, smoking and obesity were significantly associated with sleep disturbances (p less than 0.01). Participants with asthma, hypertension, chronic heart disease, and diabetes mellitus reported significantly more sleeping disturbance (p=0.016 to p=0.001). Conclusions: Sleep disturbances are associated with obesity, smoking, chronic health conditions, and lower performance among  Saudi adults.

  6. Coronagraphic Wavefront Control for the ATLAST-9.2m Telescope

    Science.gov (United States)

    Lyon, RIchard G.; Oegerle, William R.; Feinberg, Lee D.; Bolcar, Matthew R.; Dean, Bruce H.; Mosier, Gary E.; Postman, Marc

    2010-01-01

    The Advanced Technology for Large Aperture Space Telescope (ATLAST) concept was assessed as one of the NASA Astrophysics Strategic Mission Concepts (ASMC) studies. Herein we discuss the 9.2-meter diameter segmented aperture version and its wavefront sensing and control (WFSC) with regards to coronagraphic detection and spectroscopic characterization of exoplanets. The WFSC would consist of at least two levels of sensing and control: (i) an outer coarser level of sensing and control to phase and control the segments and secondary mirror in a manner similar to the James Webb Space Telescope but operating at higher temporal bandwidth, and (ii) an inner, coronagraphic instrument based, fine level of sensing and control for both amplitude and wavefront errors operating at higher temporal bandwidths. The outer loop would control rigid-body actuators on the primary and secondary mirrors while the inner loop would control one or more segmented deformable mirror to suppress the starlight within the coronagraphic field-of view. Herein we discuss the visible nulling coronagraph (VNC) and the requirements it levies on wavefront sensing and control and show the results of closed-loop simulations to assess performance and evaluate the trade space of system level stability versus control bandwidth.

  7. Characterizing the Habitable Zone Planets of Kepler Stars

    Science.gov (United States)

    Fischer, Debra

    Planet Hunters (PH) is a well-established and successful web interface that allows citizen scientists to search for transiting planets in the NASA Kepler public archive data. Over the past 3 years, our users have made more than 20 million light curve classifications. We now have more than 300,000 users around the world. However, more than half of the Kepler data has not yet been displayed to our volunteers. In June 2014 we are launching Planet Hunters v2.0. The backend of the site has been completely redesigned. The new website is more intuitive and faster; we have improved the real-time weighting algorithm that assigns transit scores for faster and more accurate extraction of the transit events from the database. With Planet Hunters v2.0, we expect that assessments will be ten times faster, so that we have the opportunity to complete the classifications for the backlog of Kepler light curve in the next three years. There are three goals for this project. First, we will data-mine the PH classifications to search for long period planets with fewer than 5 transit events. We have demonstrated that our volunteers are efficient at detecting planets with long periods and radii greater than a few REARTH. This region of parameter space is optimal for characterizing larger planets orbiting close to the habitable zone. To build upon the citizen science efforts, we will model the light curves, search for evidence of false positives, and contribute observations of stellar spectra to refine both the stellar and orbital parameters. Second, we will carry out a careful analysis of the fraction of transits that are missed (a function of planet radius and orbital period) to derive observational incompleteness factors. The incompleteness factors will be combined with geometrical detection factors to assess the planet occurrence rate for wide separations. This is a unique scientific contribution current studies of planet occurrence rate are either restricted to orbital periods shorter

  8. Star-Formation History in Early Universe Revealed by Blind Line-Search Using AtLAST and ALMA

    Science.gov (United States)

    Hayatsu, H.; Natsuki

    2018-01-01

    Using blind line searches to understand the cosmic star-formation history is one of the strategies that will be pursued by AtLAST, which will have high sensitivity and mapping speed. Before moving into the 'AtLAST era', it is essential to develop a method to efficiently detect faint sources considering the completeness of source detection and contamination by false detections. Furthermore, in order to propose strategies for blind line searching using AtLAST, it is necessary to know to what extent we can constrain the luminosity function using existing ALMA archival data. In this presentation, we report the current status of tests using a blind line-searching method and show preliminary results. We plan to apply our final results to various science cases for future AtLAST observations e.g. cross-checking the luminosity density using an intensity-mapping technique or estimating the redshift evolution of ionization state or metallicity by combining with JWST or SPICA data. We plan to release our code as a CASA task.

  9. The Role of APEX as a Pathfinder for AtLAST

    Science.gov (United States)

    Wyrowski, Friedrich

    2018-01-01

    Now more than 12 years in operation, the Atacama Pathfinder Experiment (APEX) 12 m submillimeter telescope has significantly contributed to a wide variety of submillimeter astronomy science areas, ranging from the discoveries of new molecules to large and deep imaging of the submillimeter sky. While ALMA operation is in full swing, APEX is strengthening its role not only as pathfinder for studying large source samples and spatial scales to prepare detailed high angular resolution ALMA follow ups, but also as fast response instruments to complement new results from ALMA. Furthermore, APEX ensures southern hemisphere access for submillimeter projects complementing archival Herschel research as well as new SOFIA science. With new broadband and multipixel receivers as well as large cameras for wide-field continuum imaging, APEX will pave the way towards the science envisioned with ATLAST. In this contribution, the current status and ongoing upgrades of APEX will be discussed, with an emphasis on the importance of continuous cutting edge science and state-of-the-art instrumentation that will bridge the gap towards ATLAST.

  10. AtlasT4SS: a curated database for type IV secretion systems.

    Science.gov (United States)

    Souza, Rangel C; del Rosario Quispe Saji, Guadalupe; Costa, Maiana O C; Netto, Diogo S; Lima, Nicholas C B; Klein, Cecília C; Vasconcelos, Ana Tereza R; Nicolás, Marisa F

    2012-08-09

    The type IV secretion system (T4SS) can be classified as a large family of macromolecule transporter systems, divided into three recognized sub-families, according to the well-known functions. The major sub-family is the conjugation system, which allows transfer of genetic material, such as a nucleoprotein, via cell contact among bacteria. Also, the conjugation system can transfer genetic material from bacteria to eukaryotic cells; such is the case with the T-DNA transfer of Agrobacterium tumefaciens to host plant cells. The system of effector protein transport constitutes the second sub-family, and the third one corresponds to the DNA uptake/release system. Genome analyses have revealed numerous T4SS in Bacteria and Archaea. The purpose of this work was to organize, classify, and integrate the T4SS data into a single database, called AtlasT4SS - the first public database devoted exclusively to this prokaryotic secretion system. The AtlasT4SS is a manual curated database that describes a large number of proteins related to the type IV secretion system reported so far in Gram-negative and Gram-positive bacteria, as well as in Archaea. The database was created using the RDBMS MySQL and the Catalyst Framework based in the Perl programming language and using the Model-View-Controller (MVC) design pattern for Web. The current version holds a comprehensive collection of 1,617 T4SS proteins from 58 Bacteria (49 Gram-negative and 9 Gram-Positive), one Archaea and 11 plasmids. By applying the bi-directional best hit (BBH) relationship in pairwise genome comparison, it was possible to obtain a core set of 134 clusters of orthologous genes encoding T4SS proteins. In our database we present one way of classifying orthologous groups of T4SSs in a hierarchical classification scheme with three levels. The first level comprises four classes that are based on the organization of genetic determinants, shared homologies, and evolutionary relationships: (i) F-T4SS, (ii) P-T4SS, (iii

  11. AtlasT4SS: A curated database for type IV secretion systems

    Directory of Open Access Journals (Sweden)

    Souza Rangel C

    2012-08-01

    Full Text Available Abstract Background The type IV secretion system (T4SS can be classified as a large family of macromolecule transporter systems, divided into three recognized sub-families, according to the well-known functions. The major sub-family is the conjugation system, which allows transfer of genetic material, such as a nucleoprotein, via cell contact among bacteria. Also, the conjugation system can transfer genetic material from bacteria to eukaryotic cells; such is the case with the T-DNA transfer of Agrobacterium tumefaciens to host plant cells. The system of effector protein transport constitutes the second sub-family, and the third one corresponds to the DNA uptake/release system. Genome analyses have revealed numerous T4SS in Bacteria and Archaea. The purpose of this work was to organize, classify, and integrate the T4SS data into a single database, called AtlasT4SS - the first public database devoted exclusively to this prokaryotic secretion system. Description The AtlasT4SS is a manual curated database that describes a large number of proteins related to the type IV secretion system reported so far in Gram-negative and Gram-positive bacteria, as well as in Archaea. The database was created using the RDBMS MySQL and the Catalyst Framework based in the Perl programming language and using the Model-View-Controller (MVC design pattern for Web. The current version holds a comprehensive collection of 1,617 T4SS proteins from 58 Bacteria (49 Gram-negative and 9 Gram-Positive, one Archaea and 11 plasmids. By applying the bi-directional best hit (BBH relationship in pairwise genome comparison, it was possible to obtain a core set of 134 clusters of orthologous genes encoding T4SS proteins. Conclusions In our database we present one way of classifying orthologous groups of T4SSs in a hierarchical classification scheme with three levels. The first level comprises four classes that are based on the organization of genetic determinants, shared homologies, and

  12. Characterization of Symptoms in Irritable Bowel Syndrome with Mixed Bowel Habit Pattern

    Science.gov (United States)

    Su, Andrew; Shih, Wendy; Presson, Angela P.; Chang, Lin

    2013-01-01

    Background Irritable bowel syndrome (IBS) with mixed bowel habits (IBS-M) is a heterogeneous subtype with varying symptoms of constipation and diarrhea, and has not been well characterized. We aimed to characterize gastrointestinal (GI) and non-GI symptoms in IBS-M patients from a U.S. community, and to compare them with IBS with constipation (IBS-C) and diarrhea (IBS-D). Methods Subjects answering community advertisements and meeting Rome III criteria for IBS completed symptom questionnaires. Key Results Of the initial 289 IBS patients identified, one-third (n=51, 32.5%) who met Rome III criteria for IBS-M endorsed having either loose stools or hard stools due to medication. These patients had more severe symptoms and longer duration of flares compared to the rest of the IBS-M group (p = 0.014, p = 0.005). Excluding IBS-M patients with medication-related extremes in stool form who could not be reclassified by medical history, 247 IBS patients were assessed. IBS-M was the most common (44.1%), followed by IBS-C (27.9%), IBS-D (26.3%), and IBS-U (unsubtyped, 1.6%). IBS-M shared symptoms with both IBS-C and IBS-D (p-value range: habits (27.5%), bloating (26.6%), and abdominal pain (20.2%). There were no differences in non-GI symptoms between subtypes. Conclusions & Inferences IBS-M is a heterogeneous symptom group and thus requires that subclassification criteria be better defined. Use of laxative/anti-diarrheal medications adds to the diagnostic complexity in a potentially more severe subset of IBS-M and should be assessed for accurate subclassification. PMID:23991913

  13. The Atacama Large Aperture Submm/mm Telescope (AtLAST) Project

    Science.gov (United States)

    Bertoldi, Frank

    2018-01-01

    In the past decade a strong case has been made for the construction of a next generation, 25 to 40-meter large submillimeter telescope, most notably through the CCAT and the Japanese LST projects. Although much effort had been spent on detailed science cases and technological studies, none of these projects have yet secured funding to advance to construction. We invite the interested community to join a study of the scientific merit, technical implementation, and financial path toward what we coin the "Atacama Large Submillimeter Telescope" (AtLAST). Through this community workshop, working groups, and a final report to be released in early 2019, we hope to motivate the global astronomy community to value and support the realization of such a facility.

  14. A 16-m Telescope for the Advanced Technology Large Aperture Telescope (ATLAST) Mission

    Science.gov (United States)

    Lillie, Charles F.; Dailey, D. R.; Polidan, R. S.

    2010-01-01

    Future space observatories will require increasingly large telescopes to study the earliest stars and galaxies, as well as faint nearby objects. Technologies now under development will enable telescopes much larger than the 6.5-meter diameter James Webb Space Telescope (JWST) to be developed at comparable costs. Current segmented mirror and deployable optics technology enables the 6.5 meter JWST telescope to be folded for launch in the 5-meter diameter Ariane 5 payload fairing, and deployed autonomously after reaching orbit. Late in the next decade, when the Ares V Cargo Launch Vehicle payload fairing becomes operational, even larger telescope can be placed in orbit. In this paper we present our concept for a 16-meter JWST derivative, chord-fold telescope which could be stowed in the 10-m diameter Ares V fairing, plus a description of the new technologies that enable ATLAST to be developed at an affordable price.

  15. A cost-effective and serviceable ATLAST 9.2m telescope architecture

    Science.gov (United States)

    Feinberg, Lee D.; Jones, Andrew; Mosier, Gary; Rioux, Norman; Redding, Dave; Kienlen, Mike

    2014-08-01

    The ATLAST 9.2m architecture has evolved to be more cost effective while also meeting a more thorough understanding of the driving science requirements. The new approach can fit in an existing Delta IV Heavy rocket and makes extensive use of heritage and selective use of technology in order to minimize development time and cost. We have performed a more thorough look at how to meet the stability requirements for both thermal and dynamics and have an approach consistent with an initial error budget. In addition, we have developed concepts to support robotic or human servicing in a cost effective manner through a modular approach that relies on simple, external access and metrology. These refinements to the architecture enable a cost-effective, long-lifecycle, and relatively low risk approach to development.

  16. ATLAST-9.2m: a Large-Aperture Deployable Space Telescope

    Science.gov (United States)

    Oergerle, William; Feinberg, Lee D.; Purves, Lloyd R.; Hyde, T. Tupper; Thronson, Harley A.; Townsend, Jacqueline A.; Postman, Marc; Bolear, Matthew R.; Budinoff, Jason G.; Dean, Bruce H.; hide

    2010-01-01

    We present results of a study of a deployable version of the Advanced Technology Large-Aperture Space Telescope (ATLAST), designed to operate in a Sun-Earth L2 orbit. The primary mirror of the segmented 9.2-meter aperture has 36 hexagonal 1.315 m (flat to flat) glass mirrors. The architecture and folding of the telescope is similar to JWST, allowing it to fit into the 6.5 m fairing of a modest upgrade to the Delta-IV Heavy version of the Evolved Expendable Launch Vehicle (EELV). We discuss the overall observatory design, optical design, instruments, stray light, wavefront sensing and control, pointing and thermal control, and in-space servicing options.

  17. A Review of Some Superconducting Technologies for AtLAST: Parametric Amplifiers, Kinetic Inductance Detectors, and On-Chip Spectrometers

    Science.gov (United States)

    Noroozian, Omid

    2018-01-01

    The current state of the art for some superconducting technologies will be reviewed in the context of a future single-dish submillimeter telescope called AtLAST. The technologies reviews include: 1) Kinetic Inductance Detectors (KIDs), which have now been demonstrated in large-format kilo-pixel arrays with photon background-limited sensitivity suitable for large field of view cameras for wide-field imaging. 2) Parametric amplifiers - specifically the Traveling-Wave Kinetic Inductance (TKIP) amplifier - which has enormous potential to increase sensitivity, bandwidth, and mapping speed of heterodyne receivers, and 3) On-chip spectrometers, which combined with sensitive direct detectors such as KIDs or TESs could be used as Multi-Object Spectrometers on the AtLAST focal plane, and could provide low-medium resolution spectroscopy of 100 objects at a time in each field of view.

  18. Characterization of potentially habitable planets: Retrieval of atmospheric and planetary properties from emission spectra

    OpenAIRE

    von Paris, P.; P. Hedelt; Selsis, F.; F. Schreier; Trautmann, T.

    2013-01-01

    An increasing number of potentially habitable terrestrial planets and planet candidates are found by ongoing planet search programs. The search for atmospheric signatures to establish planetary habitability and the presence of life might be possible in the future. We want to quantify the accuracy of retrieved atmospheric parameters which might be obtained from infrared emission spectroscopy. We use synthetic observations of hypothetical habitable planets, constructed with a parametrized atmos...

  19. Joint Europa Mission (JEM). A Multiscale Study of Europa to Characterize its Habitability and Search for Extant Life

    Science.gov (United States)

    Blanc, M.; Prieto-Ballesteros, O.; André, N.; Gomez-Elvira, J.; T. JEM Team

    2017-09-01

    We propose that ESA works with NASA, which presently leads the way towards in situ exploration of Europa, to design and fly jointly an ambitious and exciting planetary mission to characterize biosignatures in the environment of Europa (surface, subsurface and exosphere), while we also want to address a more general question: how does life develop in a specific habitable environment, and what are the evolutional properties of a habitable planet or satellite and of its host planetary/satellite system which make the development of life possible. The Joint Europa Mission was proposed to ESA's Cosmic Vision call for M5 missions in October 2016.

  20. Pulling Back the Veil: The Characterization and Habitability of Enshrouded Worlds

    Science.gov (United States)

    Arney, Giada Nicole

    habitability, I compared the production of fractal organic haze on Archean Earth-analog planets around several spectral types of stars: the sun at 2.7 billion years ago and at present day; the highly flaring M3.5V dwarf AD Leo; the M4V dwarf GJ 876; a modeled quiescent M dwarf; the K2V star epsilon Eridani; and the F2V star sigma Bootis. In my simulations, planets orbiting stars with the highest or lowest UV fluxes did not form haze. Low UV-stars are unable to drive the photochemistry needed for haze formation. High UV stars generate photochemical oxygen radicals that halt the buildup of this haze. Hazes can impact planetary habitability via UV shielding and surface cooling, but this cooling seems unimportant for hazy M dwarf planets because the bulk of the M dwarf spectral energy arrives at longer infrared wavelengths where organic hazes are relatively transparent. I simulated hazy planet spectra for these exoplanet-analogs in reflected light, thermal emission, and transit transmission and found that the spectral features of organic hazes should be detectable with future telescopes. For 10 transits of a hypothetical Archean-analog planet orbiting GJ 876 observed by the James Webb Space Telescope (JWST) over 0.8-14 mum, haze, methane and carbon dioxide are detectable assuming photon-limited noise levels. For direct imaging of a planet at 10 pc using a coronagraphic 10-meter class ultraviolet-visible-near infrared telescope, a shortwave haze absorption feature would be strongly detectable at >12 sigma in 200 hours. The impact of haze on planetary habitability and spectra are crucial to consider for future characterization of terrestrial exoplanets. Haze in the Archean could even have impacted the evolution of photosynthetic pigments because the spectrum of light reaching the planet's surface would have been reddened. I explore the consequences of this and show the spectrum of photons at the Earth's surface beneath a haze. In addition to haze, other types of UV shields would

  1. Microbial Characterization During the Early Habitation of the International Space Station

    Science.gov (United States)

    Castro, V. A.; Thrasher, A. N.; Healy, M.; Ott, C. M.; Pierson, D. L.

    2004-01-01

    An evaluation of the microbiota from air, water, and surface samples provided a baseline of microbial characterization onboard the International Space Station (ISS) to gain insight into bacterial and fungal contamination during the initial stages of construction and habitation. Using 16S genetic sequencing and rep-PCR, 63 bacterial strains were isolated for identification and fingerprinted for microbial tracking. Of the bacterial strains that were isolated and fingerprinted, 19 displayed similarity to each other. The use of these molecular tools allowed for the identification of bacteria not previously identified using automated biochemical analysis and provided a clear indication of the source of several ISS contaminants. Strains of Bradyrhizobium and Sphingomonas unable to be identified using sequencing were identified by comparison of rep-PCR DNA fingerprints. Distinct DNA fingerprints for several strains of Methylobacterium provided a clear indication of the source of an ISS water supply contaminant. Fungal and bacterial data acquired during monitoring do not suggest there is a current microbial hazard to the spacecraft, nor does any trend indicate a potential health risk. Previous spacecraft environmental analysis indicated that microbial contamination will increase with time and will require continued surveillance. Copyright 2004 Springer-Verlag.

  2. High Frequency High Spectral Resolution Focal Plane Arrays for AtLAST

    Science.gov (United States)

    Baryshev, Andrey

    2018-01-01

    Large collecting area single dish telescope such as ATLAST will be especially effective for medium (R 1000) and high (R 50000) spectral resolution observations. Large focal plane array is a natural solution to increase mapping speed. For medium resolution direct detectors with filter banks (KIDs) and or heterodyne technology can be employed. We will analyze performance limits of comparable KID and SIS focal plane array taking into account quantum limit and high background condition of terrestrial observing site. For large heterodyne focal plane arrays, a high current density AlN junctions open possibility of large instantaneous bandwidth >40%. This and possible multi frequency band FPSs presents a practical challenge for spatial sampling and scanning strategies. We will discuss phase array feeds as a possible solution, including a modular back-end system, which can be shared between KID and SIS based FPA. Finally we will discuss achievable sensitivities and pixel co unts for a high frequency (>500 GHz) FPAs and address main technical challenges: LO distribution, wire counts, bias line multiplexing, and monolithic vs. discrete mixer component integration.

  3. Psychology of Habit.

    Science.gov (United States)

    Wood, Wendy; Rünger, Dennis

    2016-01-01

    As the proverbial creatures of habit, people tend to repeat the same behaviors in recurring contexts. This review characterizes habits in terms of their cognitive, motivational, and neurobiological properties. In so doing, we identify three ways that habits interface with deliberate goal pursuit: First, habits form as people pursue goals by repeating the same responses in a given context. Second, as outlined in computational models, habits and deliberate goal pursuit guide actions synergistically, although habits are the efficient, default mode of response. Third, people tend to infer from the frequency of habit performance that the behavior must have been intended. We conclude by applying insights from habit research to understand stress and addiction as well as the design of effective interventions to change health and consumer behaviors.

  4. Characterization of facial skin of various Asian populations through visual and non-invasive instrumental evaluations: influence of age and skincare habits.

    Science.gov (United States)

    Galzote, Carlos; Estanislao, Roderico; Suero, Michael Oliver; Khaiat, Alain; Mangubat, Maria Isabel; Moideen, Rafeeq; Tagami, Hachiro; Wang, Xuemin

    2013-11-01

    We aimed to evaluate the impact of age and skincare habits on facial skin of different Asian ethnicities by comparing skin properties and skincare habits among various Asian populations of varying age groups. We evaluated approximately 100 female subjects each from a total of eight Asian cities in China, India, South Korea, Japan, and the Philippines grouped according to age ranging from 14 to 75 years during a summer season. Facial skin was characterized using dermatological examinations of the cheek and instrumental evaluations of the forehead and cheek. Information regarding personal skincare habits was collected using a questionnaire. In 834 female subjects, characteristics related to skin surface moisture, elasticity, and sebum level decreased with age. Differences in skincare habits corresponded with variations in skin parameters. Subjects with the least severe photodamage reported a generally early onset of their skincare habits. These results demonstrate common trends as well as inherent differences in skin characteristics among Asian populations, reflecting the impact of age and the diversity of skincare habits of Asian women. These results may be beneficial when developing new skincare products that are well suited to these Asian populations. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  5. Joint Europa Mission (JEM) : A multi-scale study of Europa to characterize its habitability and search for life.

    Science.gov (United States)

    Blanc, Michel; Prieto Ballesteros, Olga; Andre, Nicolas; Cooper, John F.

    2017-04-01

    Europa is the closest and probably the most promising target to perform a comprehensive characterization of habitability and search for extant life. We propose that NASA and ESA join forces to design an ambitious planetary mission we call JEM (for Joint Europa Mission) to reach this objective. JEM will be assigned the following overarching goal: Understand Europa as a complex system responding to Jupiter system forcing, characterize the habitability of its potential biosphere, and search for life in its surface, sub-surface and exosphere. Our observation strategy to address these goals will combine three scientific measurement sequences: measurements on a high-latitude, low-latitude Europan orbit providing a continuous and global mapping of planetary fields (magnetic and gravity) and of the neutral and charged environment during a period of three months; in-situ measurements at the surface, using a soft lander operating during 35 days, to search for bio-signatures at the surface and sub-surface and operate a geophysical station; measurements of the chemical composition of the very low exosphere and plumes in search for biomolecules. The implementation of these three observation sequences will rest on the combination of two science platforms equipped with the most advanced instrumentation: a soft lander to perform all scientific measurements at the surface and sub-surface at a selected landing site, and a carrier/relay/orbiter to perform the orbital survey and descent sequences. In this concept, the orbiter will perform science operations during the relay phase on a carefully optimized halo orbit of the Europa-Jupiter system before moving to its final Europan orbit. The design of both orbiter and lander instruments will have to accommodate the very challenging radiation mitigation and Planetary Protection issues. The proposed lander science platform is composed of a geophysical station and of two complementary astrobiology facilities dedicated to bio

  6. Habit formation.

    Science.gov (United States)

    Smith, Kyle S; Graybiel, Ann M

    2016-03-01

    Habits, both good ones and bad ones, are pervasive in animal behavior. Important frameworks have been developed to understand habits through psychological and neurobiological studies. This work has given us a rich understanding of brain networks that promote habits, and has also helped us to understand what constitutes a habitual behavior as opposed to a behavior that is more flexible and prospective. Mounting evidence from studies using neural recording methods suggests that habit formation is not a simple process. We review this evidence and take the position that habits could be sculpted from multiple dissociable changes in neural activity. These changes occur across multiple brain regions and even within single brain regions. This strategy of classifying components of a habit based on different brain signals provides a potentially useful new way to conceive of disorders that involve overly fixed behaviors as arising from different potential dysfunctions within the brain's habit network.

  7. Coastal California's Fog as a Unique Habitable Niche: Design for Autonomous Sampling and Preliminary Aerobiological Characterization

    Science.gov (United States)

    Gentry, Diana; Cynthia Ouandji; Arismendi, Dillon; Guarro, Marcello; Demachkie, Isabella; Crosbie, Ewan; Dadashazar, Hossein; MacDonald, Alex B.; Wang, Zhen; Sorooshian, Armin; hide

    2017-01-01

    Just as on the land or in the ocean, atmospheric regions may be more or less hospitable to life. The aerobiosphere, or collection of living things in Earth's atmosphere, is poorly understood due to the small number and ad hoc nature of samples studied. However, we know viable airborne microbes play important roles, such as providing cloud condensation nuclei. Knowing the distribution of such microorganisms and how their activity can alter water, carbon, and other geochemical cycles is key to developing criteria for planetary habitability, particularly for potential habitats with wet atmospheres but little stable surface water. Coastal California has regular, dense fog known to play a major transport role in the local ecosystem. In addition to the significant local (1 km) geographical variation in typical fog, previous studies have found that changes in height above surface of as little as a few meters can yield significant differences in typical concentrations, populations and residence times. No single current sampling platform (ground-based impactors, towers, balloons, aircraft) is capable of accessing all of these regions of interest.A novel passive fog and cloud water sampler, consisting of a lightweight passive impactor suspended from autonomous aerial vehicles (UAVs), is being developed to allow 4D point sampling within a single fog bank, allowing closer study of small-scale (100 m) system dynamics. Fog and cloud droplet water samples from low-altitude aircraft flights in nearby coastal waters were collected and assayed to estimate the required sample volumes, flight times, and sensitivity thresholds of the system under design.125 cloud water samples were collected from 16 flights of the Center for Interdisciplinary Remotely Piloted Aircraft Studies (CIRPAS) instrumented Twin Otter, equipped with a sampling tube collector, occurring between 18 July and 12 August 2016 below 1 km altitude off the central coast. The collector was flushed first with 70 ethanol

  8. Consumption Habits and Humps

    DEFF Research Database (Denmark)

    Kraft, Holger; Munk, Claus; Seifried, Frank Thomas

    2017-01-01

    We show that the optimal consumption of an individual over the life cycle can have the hump shape (inverted U-shape) observed empirically if the preferences of the individual exhibit internal habit formation. In the absence of habit formation, an impatient individual would prefer a decreasing...... consumption path over life. However, because of habit formation, a high initial consumption would lead to high required consumption in the future. To cover the future required consumption, wealth is set aside, but the necessary amount decreases with age which allows consumption to increase in the early part...... of life. At some age, the impatience outweighs the habit concerns so that consumption starts to decrease. We derive the optimal consumption strategy in closed form, deduce sufficient conditions for the presence of a consumption hump, and characterize the age at which the hump occurs. Numerical examples...

  9. Habitable Trinity

    Directory of Open Access Journals (Sweden)

    James M. Dohm

    2015-01-01

    Full Text Available Habitable Trinity is a newly proposed concept of a habitable environment. This concept indicates that the coexistence of an atmosphere (consisting largely of C and N, an ocean (H and O, and a landmass (supplier of nutrients accompanying continuous material circulation between these three components driven by the Sun is one of the minimum requirements for life to emerge and evolve. The life body consists of C, O, H, N and other various nutrients, and therefore, the presence of water, only, is not a sufficient condition. Habitable Trinity environment must be maintained to supply necessary components for life body. Our Habitable Trinity concept can also be applied to other planets and moons such as Mars, Europa, Titan, and even exoplanets as a useful index in the quest for life-containing planetary bodies.

  10. Climatic Habitability

    Science.gov (United States)

    Spiegel, David S.; Menou, K.; Scharf, C. A.

    2008-05-01

    It is likely that, in the next several years, the Corot and Kepler satellites will find many terrestrial planets around other stars. In order to judge what fraction of these planets are likely to be hospitable to life, it is important to reassess the notion of the habitable zone. Classical considerations of habitability, in the context of extrasolar planets, have often regarded it as a binary property (either a planet is or is not habitable). But according to the standard liquid water definition, the Earth itself is only partially habitable. I will describe a way to use energy balance climate models to assess the spatial and temporal habitability of terrestrial planets that are not too different from the Earth. Initial investigations of model planets' temperature distributions indicate that climate varies with observable features of planets (e.g., how far they are from their star) and unobservable features (e.g., how fast they are spinning, how much surface water they have, what their obliquity is). The habitability of model pseudo-Earths with different rotation rates or land-ocean fractions, for instance, generally differs significantly from that of the Earth itself.

  11. Habit persistence

    DEFF Research Database (Denmark)

    Vinther Møller, Stig

    2009-01-01

    This paper uses an iterated GMM approach to estimate and test the consumption based habit persistence model of Campbell and Cochrane (1999) on the US stock market. The empirical evidence shows that the model is able to explain the size premium, but fails to explain the value premium. Further...

  12. Characterizing of a Mid-Latitude Ice-Rich Landing Site on Mars to Enable in Situ Habitability Studies

    Science.gov (United States)

    Heldmann, J.; Schurmeier, L. R.; Wilhelm, M.; Stoker, C.; McKay, C.; Davila, A.; Marinova, M.; Karcz, J.; Smith, H.

    2012-01-01

    We suggest an ice-rich landing site at 188.5E 46.16N within Amazonis Planitia as a candidate location to support a Mars lander mission equipped to study past habitability and regions capable of preserving the physical and chemical signs of life and organic matter. Studies of the ice-rich subsurface on Mars are critical for several reasons. The subsurface environment provides protection from radiation to shield organic and biologic compounds from destruction. The ice-rich substrate is also ideal for preserving organic and biologic molecules and provides a source of H2O for biologic activity. Examination of martian ground ice can test several hypotheses such as: 1) whether ground ice supports habitable conditions, 2) that ground ice can preserve and accumulate organic compounds, and 3) that ice contains biomolecules evident of past or present biological activity on Mars. This Amazonis site, located near the successful Viking Lander 2, shows indirect evidence of subsurface ice (ubiquitous defined polygonal ground, gamma ray spectrometer hydrogen signature, and numerical modeling of ice stability) and direct evidence of exposed subsurface ice. This site also provides surface conditions favorable to a safe landing including no boulders, low rock density, minimal rough topography, and few craters.

  13. EXOPLANET CHARACTERIZATION BY PROXY: A TRANSITING 2.15 R{sub Circled-Plus} PLANET NEAR THE HABITABLE ZONE OF THE LATE K DWARF KEPLER-61

    Energy Technology Data Exchange (ETDEWEB)

    Ballard, Sarah; Charbonneau, David; Fressin, Francois; Torres, Guillermo; Irwin, Jonathan; Newton, Elisabeth [University of Washington, Seattle, WA 98195 (United States); Desert, Jean-Michel; Crepp, Justin R.; Shporer, Avi [California Institute of Technology, Pasadena, CA 91125 (United States); Mann, Andrew W. [Institute for Astronomy, University of Hawai' i, Honolulu, HI 96822 (United States); Ciardi, David R. [NASA Exoplanet Science Institute/Caltech, Pasadena, CA 91125 (United States); Henze, Christopher E.; Bryson, Stephen T.; Howell, Steven B. [NASA Ames Research Center, Moffett Field, CA 94035 (United States); Horch, Elliott P. [Southern Connecticut State University, New Haven, CT 06515 (United States); Everett, Mark E., E-mail: sarahba@uw.edu [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States)

    2013-08-20

    We present the validation and characterization of Kepler-61b: a 2.15 R{sub Circled-Plus} planet orbiting near the inner edge of the habitable zone of a low-mass star. Our characterization of the host star Kepler-61 is based upon a comparison with a set of spectroscopically similar stars with directly measured radii and temperatures. We apply a stellar prior drawn from the weighted mean of these properties, in tandem with the Kepler photometry, to infer a planetary radius for Kepler-61b of 2.15 {+-} 0.13 R{sub Circled-Plus} and an equilibrium temperature of 273 {+-} 13 K (given its period of 59.87756 {+-} 0.00020 days and assuming a planetary albedo of 0.3). The technique of leveraging the physical properties of nearby ''proxy'' stars allows for an independent check on stellar characterization via the traditional measurements with stellar spectra and evolutionary models. In this case, such a check had implications for the putative habitability of Kepler-61b: the planet is 10% warmer and larger than inferred from K-band spectral characterization. From the Kepler photometry, we estimate a stellar rotation period of 36 days, which implies a stellar age of >1 Gyr. We summarize the evidence for the planetary nature of the Kepler-61 transit signal, which we conclude is 30,000 times more likely to be due to a planet than a blend scenario. Finally, we discuss possible compositions for Kepler-61b with a comparison to theoretical models as well as to known exoplanets with similar radii and dynamically measured masses.

  14. Exoplanet habitability.

    Science.gov (United States)

    Seager, Sara

    2013-05-03

    The search for exoplanets includes the promise to eventually find and identify habitable worlds. The thousands of known exoplanets and planet candidates are extremely diverse in terms of their masses or sizes, orbits, and host star type. The diversity extends to new kinds of planets, which are very common yet have no solar system counterparts. Even with the requirement that a planet's surface temperature must be compatible with liquid water (because all life on Earth requires liquid water), a new emerging view is that planets very different from Earth may have the right conditions for life. The broadened possibilities will increase the future chances of discovering an inhabited world.

  15. Habitability: A Review.

    Science.gov (United States)

    Cockell, C S; Bush, T; Bryce, C; Direito, S; Fox-Powell, M; Harrison, J P; Lammer, H; Landenmark, H; Martin-Torres, J; Nicholson, N; Noack, L; O'Malley-James, J; Payler, S J; Rushby, A; Samuels, T; Schwendner, P; Wadsworth, J; Zorzano, M P

    2016-01-01

    Habitability is a widely used word in the geoscience, planetary science, and astrobiology literature, but what does it mean? In this review on habitability, we define it as the ability of an environment to support the activity of at least one known organism. We adopt a binary definition of "habitability" and a "habitable environment." An environment either can or cannot sustain a given organism. However, environments such as entire planets might be capable of supporting more or less species diversity or biomass compared with that of Earth. A clarity in understanding habitability can be obtained by defining instantaneous habitability as the conditions at any given time in a given environment required to sustain the activity of at least one known organism, and continuous planetary habitability as the capacity of a planetary body to sustain habitable conditions on some areas of its surface or within its interior over geological timescales. We also distinguish between surface liquid water worlds (such as Earth) that can sustain liquid water on their surfaces and interior liquid water worlds, such as icy moons and terrestrial-type rocky planets with liquid water only in their interiors. This distinction is important since, while the former can potentially sustain habitable conditions for oxygenic photosynthesis that leads to the rise of atmospheric oxygen and potentially complex multicellularity and intelligence over geological timescales, the latter are unlikely to. Habitable environments do not need to contain life. Although the decoupling of habitability and the presence of life may be rare on Earth, it may be important for understanding the habitability of other planetary bodies.

  16. Characterization of the energetic consumption habits in communities in the countryside area of Amazon State concerning energetic planning; Perfil dos habitos de consumo de energeticos em comunidades do interior do Estado do Amazonas para fins de planejamento energetico

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Rubem C.R.; Santos Conserva, Auricelia dos; Muniz, Marcos W.C. [Amazonas Univ., Manaus, AM (Brazil)

    1996-12-31

    To outline an energetic politic to Amazons State is a difficult task considering the enormous peculiarities of the region. In order to do so it is necessary to elaborate an energy balance of the state. This paper aims to help in this procedure by performing the characterization of the energetic consumption habits of small communities in the countryside area of the above named state. Four different representative cities were studied in concerning of its socio-economical and energetic characteristics. It was concluded that parameters such as demographic density, familiar income, energy sources, etc. are to be considered during the elaboration of the state energy balance 6 refs., 1 tab.

  17. Consumption Habits and Humps

    DEFF Research Database (Denmark)

    Kraft, Holger; Munk, Claus; Seifried, Frank Thomas

    We show that the optimal consumption of an individual over the life cycle can have the hump shape (inverted U-shape) observed empirically if the preferences of the individual exhibit internal habit formation. In the absence of habit formation, an impatient individual would prefer a decreasing con...

  18. On the Habitability of Aquaplanets

    Directory of Open Access Journals (Sweden)

    Rolando Cardenas

    2014-08-01

    Full Text Available An Aquatic Habitability Index is proposed, based on Quantitative Habitability Theory, and considering a very general model for life. It is a primary habitability index, measuring habitability for phytoplankton in the first place. The index is applied to some case studies, such as the habitability changes in Earth due to environmental perturbations caused by asteroid impacts.

  19. Car-use habits

    DEFF Research Database (Denmark)

    Møller, Berit Thorup; Thøgersen, John

    2008-01-01

    consequences. Since the decision is made quite automatically and only one choice alternative is considered (the habitually chosen one), behaviour guided by habit is difficult to change. The implications of car use habits for converting drivers to commuters using public transportation is analysed based......It is often claimed that many drivers use their private car rather habitually. The claim gains credibility from the fact that travelling to many everyday destinations fulfils all the prerequisites for habit formation: it is recurring, performed under stable circumstances and produces rewarding...... to do so, car use habit, and the interaction between the two, confirms the theory-derived hypothesis that car use habits act as an obstacle to the transformation of intentions to commute by public transportation into action....

  20. Constraining Exoplanet Habitability with HabEx

    Science.gov (United States)

    Robinson, Tyler

    2018-01-01

    The Habitable Exoplanet Imaging mission, or HabEx, is one of four flagship mission concepts currently under study for the upcoming 2020 Decadal Survey of Astronomy and Astrophysics. The broad goal of HabEx will be to image and study small, rocky planets in the Habitable Zones of nearby stars. Additionally, HabEx will pursue a range of other astrophysical investigations, including the characterization of non-habitable exoplanets and detailed observations of stars and galaxies. Critical to the capability of HabEx to understand Habitable Zone exoplanets will be its ability to search for signs of surface liquid water (i.e., habitability) and an active biosphere. Photometry and moderate resolution spectroscopy, spanning the ultraviolet through near-infrared spectral ranges, will enable constraints on key habitability-related atmospheric species and properties (e.g., surface pressure). In this poster, we will discuss approaches to detecting signs of habitability in reflected-light observations of rocky exoplanets. We will also present initial results for modeling experiments aimed at demonstrating the capabilities of HabEx to study and understand Earth-like worlds around other stars.

  1. The role of habit in compulsivity.

    Science.gov (United States)

    Gillan, Claire M; Robbins, Trevor W; Sahakian, Barbara J; van den Heuvel, Odile A; van Wingen, Guido

    2016-05-01

    Compulsivity has been recently characterized as a manifestation of an imbalance between the brain׳s goal-directed and habit-learning systems. Habits are perhaps the most fundamental building block of animal learning, and it is therefore unsurprising that there are multiple ways in which the development and execution of habits can be promoted/discouraged. Delineating these neurocognitive routes may be critical to understanding if and how habits contribute to the many faces of compulsivity observed across a range of psychiatric disorders. In this review, we distinguish the contribution of excessive stimulus-response habit learning from that of deficient goal-directed control over action and response inhibition, and discuss the role of stress and anxiety as likely contributors to the transition from goal-directed action to habit. To this end, behavioural, pharmacological, neurobiological and clinical evidence are synthesised and a hypothesis is formulated to capture how habits fit into a model of compulsivity as a trans-diagnostic psychiatric trait. Copyright © 2016 The Authors. Published by Elsevier B.V. All rights reserved.

  2. HABEBEE: habitability of eyeball-exo-Earths.

    Science.gov (United States)

    Angerhausen, Daniel; Sapers, Haley; Citron, Robert; Bergantini, Alexandre; Lutz, Stefanie; Queiroz, Luciano Lopes; da Rosa Alexandre, Marcelo; Araujo, Ana Carolina Vieira

    2013-03-01

    Extrasolar Earth and super-Earth planets orbiting within the habitable zone of M dwarf host stars may play a significant role in the discovery of habitable environments beyond Earth. Spectroscopic characterization of these exoplanets with respect to habitability requires the determination of habitability parameters with respect to remote sensing. The habitable zone of dwarf stars is located in close proximity to the host star, such that exoplanets orbiting within this zone will likely be tidally locked. On terrestrial planets with an icy shell, this may produce a liquid water ocean at the substellar point, one particular "Eyeball Earth" state. In this research proposal, HABEBEE: exploring the HABitability of Eyeball-Exo-Earths, we define the parameters necessary to achieve a stable icy Eyeball Earth capable of supporting life. Astronomical and geochemical research will define parameters needed to simulate potentially habitable environments on an icy Eyeball Earth planet. Biological requirements will be based on detailed studies of microbial communities within Earth analog environments. Using the interdisciplinary results of both the physical and biological teams, we will set up a simulation chamber to expose a cold- and UV-tolerant microbial community to the theoretically derived Eyeball Earth climate states, simulating the composition, atmosphere, physical parameters, and stellar irradiation. Combining the results of both studies will enable us to derive observable parameters as well as target decision guidance and feasibility analysis for upcoming astronomical platforms.

  3. Legionella in habitations

    DEFF Research Database (Denmark)

    Krøjgaard, Louise Hjelmar

    and the results from the PhD work the following subjects were addressed: a) prevalence of Legionella in habitations, b) validation of the use of qPCR in risk assessment in hot water systems, c) clarifying risk factors mainly associated with Legionella in habitations, and d) discussion of interventions which could......, it was difficult to interpret the specific amount. In samples collected from the first flush from empty apartments, culture and qPCR were inconclusive. The literature studies showed that Legionella is widely dispersed in habitations all over the world, including in Denmark. Different major risk factors were...

  4. Food Habits Database (FHDBS)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The NEFSC Food Habits Database has two major sources of data. The first, and most extensive, is the standard NEFSC Bottom Trawl Surveys Program. During these...

  5. Habitability and the Multiverse

    Science.gov (United States)

    Sandora, M. E.

    2017-11-01

    Are the laws of physics set to maximize the habitability of the universe? We study how plate tectonics, core and mantle composition, homochirality, photosynthesis, and planet size depend on physics, and make predictions for where life will be found.

  6. Canadians' eating habits

    National Research Council Canada - National Science Library

    Garriguet, Didier

    2007-01-01

    This report is an overview of Canadians' eating habits: total calories consumed and the number of servings from the various food groups, as well as the percentage of total calories from fat, protein and carbohydrates...

  7. Eating habits of students

    OpenAIRE

    Hoyer, Silvestra; Zupančič, Andreja

    2015-01-01

    The article deals with eating habits of students. Its purpose was to ascertaineating habits of students living outside their primary home and are under different forms of stress. Methods: the pattern is represented by students living in student homer where they can cook and prepare their own meals. In the research, 81 students living in the students home on Cesta v Mestni log in Ljubljana. The inquiry was composed from 34 questions. The data were processed with Microsoft Excel. Body mass inde...

  8. The Supergalactic Habitable Zone

    Science.gov (United States)

    Mason, Paul

    2018-01-01

    Habitability in the local universe is examined. Constrained by metal abundance and exposure to sterilizing events, life as we know it requires significantly long periods of stable environmental conditions. Planets within galaxies undergoing major mergers, active AGN, starburst episodes, and merging black holes pose serious threats to long-term habitability. Importantly, the development of several layers of protection from high-energy particles such as a thick atmosphere, a strong planetary magnetic field, an astrosphere, and a galactic magnetic field is of great benefit. Factors such as star type and activity, planet type and composition, the location of a planet within its host galaxy, and even the location within a supercluster of galaxies can affect the potential habitability of planets. We discuss the concept of the Supergalactic Habitable Zone introduced by Mason and Biermann in terms of habitability in the local universe and find that galaxies near the center of the Virgo cluster, for example, have a much lower probability for the development of life as we know it as compared to locations in the Milky Way.

  9. The automatic component of habit in health behavior: habit as cue-contingent automaticity.

    Science.gov (United States)

    Orbell, Sheina; Verplanken, Bas

    2010-07-01

    Habit might be usefully characterized as a form of automaticity that involves the association of a cue and a response. Three studies examined habitual automaticity in regard to different aspects of the cue-response relationship characteristic of unhealthy and healthy habits. In each study, habitual automaticity was assessed by the Self-Report Habit Index (SRHI). In Study 1 SRHI scores correlated with attentional bias to smoking cues in a Stroop task. Study 2 examined the ability of a habit cue to elicit an unwanted habit response. In a prospective field study, habitual automaticity in relation to smoking when drinking alcohol in a licensed public house (pub) predicted the likelihood of cigarette-related action slips 2 months later after smoking in pubs had become illegal. In Study 3 experimental group participants formed an implementation intention to floss in response to a specified situational cue. Habitual automaticity of dental flossing was rapidly enhanced compared to controls. The studies provided three different demonstrations of the importance of cues in the automatic operation of habits. Habitual automaticity assessed by the SRHI captured aspects of a habit that go beyond mere frequency or consistency of the behavior. PsycINFO Database Record (c) 2010 APA, all rights reserved.

  10. Habit and context

    DEFF Research Database (Denmark)

    Mueller Loose, Simone; Jaeger, S. R.

    , juice, wine and beer). Each participant provided 7-20 24-h food recall dairies, hereby making it possible to develop a measure of habit in beverage choice for person*beverage type. For example, high frequency of drinking water with meals was used as a proxy for habit in water consumption. When analysed...... predictor for its consumption likelihood. The impact of this measure for habit differed across beverages, for instance it played a larger role for hot beverages and water than for the consumption of beer and wine. Eating occasions and its interaction with place of consumption had highest explanatory power...... components consumed, location and presence of other persons are suitable for reliably capturing everyday food consumption behaviour in its natural habitat. For the purpose of this presentation, attention was directed to meal centred beverage consumption. Analysis of variance with main and interaction effects...

  11. Forming a flossing habit: an exploratory study of the psychological determinants of habit formation.

    Science.gov (United States)

    Judah, Gaby; Gardner, Benjamin; Aunger, Robert

    2013-05-01

    Habit formation has been proposed as a means to promote maintenance of healthy behaviours, but there have been few investigations into how habits are formed. This exploratory study sought to model determinants of the formation of a dental flossing habit, including placement of the behaviour within the routine (before vs. after tooth-brushing), past behaviour, prospective memory ability, and motivational factors. All participants (N = 50) received a motivational intervention designed to initiate behaviour change and habit formation. Half of the participants were instructed to floss before brushing, and half after. Participants subsequently self-reported flossing behaviour daily and, 4 weeks later, flossing automaticity. Automaticity and flossing frequency were also measured at 8-month follow-up. Participants with stronger prospective memory ability, higher levels of past behaviour, and a more positive attitude flossed more frequently during the study. Stronger automaticity was predicted by positive attitudes, and increased behaviour frequency during and prior to the study. Those who flossed after brushing (rather than before) tended to form stronger flossing habits and, at 8-month follow-up, had stronger habits and flossed more frequently. Habit forming interventions might usefully consider features of everyday routines and how behaviour may be reinforced. Suggestions for further research using more methodologically rigorous designs are offered. What is already known on this subject? The formation of habit - that is, a learnt automatic response to contextual cues - requires initiation of a behaviour and repetition in a constant context. A recent formation study showed variation in habit strength despite equal repetitions, indicating that factors other than repetition may be important in habit development. From studies of routine behaviour, the boundaries between sub-routines are characterized by different processes than the middle of sub-routines, suggesting that

  12. Deciphering spectral fingerprints of habitable exoplanets.

    Science.gov (United States)

    Kaltenegger, Lisa; Selsis, Frank; Fridlund, Malcolm; Lammer, Helmut; Beichman, Charles; Danchi, William; Eiroa, Carlos; Henning, Thomas; Herbst, Tom; Léger, Alain; Liseau, René; Lunine, Jonathan; Paresce, Francesco; Penny, Alan; Quirrenbach, Andreas; Röttgering, Huub; Schneider, Jean; Stam, Daphne; Tinetti, Giovanna; White, Glenn J

    2010-01-01

    We discuss how to read a planet's spectrum to assess its habitability and search for the signatures of a biosphere. After a decade rich in giant exoplanet detections, observation techniques have advanced to a level where we now have the capability to find planets of less than 10 Earth masses (M(Earth)) (so-called "super Earths"), which may be habitable. How can we characterize those planets and assess whether they are habitable? This new field of exoplanet search has shown an extraordinary capacity to combine research in astrophysics, chemistry, biology, and geophysics into a new and exciting interdisciplinary approach to understanding our place in the Universe. The results of a first-generation mission will most likely generate an amazing scope of diverse planets that will set planet formation, evolution, and our planet into an overall context.

  13. Amphetamine Exposure Enhances Habit Formation

    National Research Council Canada - National Science Library

    Nelson, Andrew; Killcross, Simon

    2006-01-01

    ...) habits that are no longer goal directed. To examine whether sensitization of dopaminergic systems leads to a more rapid transition from action-outcome processes to S-R habits, we examined performance of amphetamine-sensitized rats...

  14. Exoplanets, extremophiles and habitability

    Science.gov (United States)

    Janot Pacheco, E.; Bernardes, L.

    2012-09-01

    Estimates of the average surface temperature and CO2 partial atmospheric pressure of already discovered exoplanets supposed to be in their Habitable Zone of their stars were surveyed from the Exoplanet Encyclopedia database. Moreover, since planetary surface temperature strongly depends on its albedo and geodynamic conditions, we have been feeding exoplanetary data into a comprehensive model of Earth's atmosphere to get better estimations. We also investigated the possible presence of "exomoons" belonging to giant planets capable of harbour dynamic stability and to retain atmospheric layers and keep geodynamic activity for long time spans. Collected information on biological data of micro-organisms classified as "extremophiles" indicate that such kind of microbial species could dwell in many of them. We thus propose an extension of the more astronomically defined "Habitable Zone" concept into the more astrobiologically "Extremophile Zone", taking into account other refined parameters allowing survival of more robust life forms.

  15. Smoking habits of nurses

    Directory of Open Access Journals (Sweden)

    E. Jacka

    1984-09-01

    Full Text Available There is little debate as to the harmful effects of cigarette smoking on health. Most health workers advise their patients to cease the practice. The impact of the advice is however diluted if it is seen to be ignored by the professionals themselves. As nurses play an increasing role in all levels of health care a survey was undertaken to investigate the smoking habits of two groups of nurses - those operating within the community and those working in institutions.

  16. Effective Physics Study Habits

    Science.gov (United States)

    Zettili, Nouredine

    2011-04-01

    We discuss the methods of efficient study habits and how they can be used by students to help them improve learning physics. In particular, we deal with ideas pertaining to the most effective techniques needed to help students improve their physics study skills. These ideas were developed as part of Project IMPACTSEED (IMproving Physics And Chemistry Teaching in SEcondary Education), an outreach grant funded by the Alabama Commission on Higher Education. This project is motivated by a major pressing local need: A large number of high school physics teachers teach out of field. In the presentation, focus on topics such as the skills of how to develop long term memory, how to improve concentration power, how to take class notes, how to prepare for and take exams, how to study scientific subjects such as physics. We argue that the student who conscientiously uses the methods of efficient study habits will be able to achieve higher results than the student who does not; moreover, a student equipped with the proper study skills will spend much less time to learn a subject than a student who has no good study habits. The underlying issue here is not the quantity of time allocated to the study efforts by the student, but the efficiency and quality of actions. This work is supported by the Alabama Commission on Higher Education as part of IMPACTSEED grant.

  17. Europa: Processes and Habitability

    Science.gov (United States)

    Pappalardo, R. T.

    Europa may be a habitable world. Evidence points strongly to a subsurface ocean beneath an ice shell about 20 km thick. Europa's surface geology as viewed by Galileo imaging suggests a thin brittle lithosphere above a warm ice layer that is at least in part convecting, in turn situated above a liquid water ocean. This configuration is consistent with thermal and geochemical modeling, and with Galileo magnetometer results. Dynamical modeling and visible crater density suggests a surface age of ˜60 million years, implying that Europa is probably still geologically active today. Large shallow craters and multi-ringed structures imply impact into low-viscosity (warm) subsurface material. The satellite's bright plains are crossed by narrow troughs and double ridges (paired ridges separated by a medial trough); a morphological sequence exists from isolated troughs to double ridges to wider and more complex ridge morphologies. Troughs are inferred as widened fractures formed though tensile and shear failure in response to global stressing of the ice shell above liquid water. Several models exist to explain ridges, but the most promising is one in which localized shear heating triggers upwelling of warm ice along fracture zones. Ruddy diffuse ruddy ridge may have formed through thermal alteration and/or partial melting of briny ice. Wider pull-apart bands represent complete separation and spreading of the icy lithosphere, in a manner broadly analogous to terrestrial sea-floor spreading. Europa's global lineament pattern implies that nonsynchronous rotation and orbital flexing ("diurnal" stressing) have worked together to deform the surface. Diurnal stressing can explain Europa's enigmatic cycloid ridge and fracture patterns, and may drive rapid strike-slip faulting along ridges. Because significant tidal amplitude is necessary to produce significant diurnal stressing, this argues strongly for a subsurface liquid layer. Extremely slow nonsynchronous rotation of the ice

  18. Bedtime habits for infants and children

    Science.gov (United States)

    Infants - bedtime habits; Children - bedtime habits; Sleep - bedtime habits; Well child care - bedtime habits ... time. Between ages 6 and 9 months, most children will sleep for 10 to 12 hours. During ...

  19. Habitable Exoplanet Imager Optical Telescope Concept Design

    Science.gov (United States)

    Stahl, H. Philip

    2017-01-01

    Habitable Exoplanet Imaging Mission (HabEx) is a concept for a mission to directly image and characterize planetary systems around Sun-like stars. In addition to the search for life on Earth-like exoplanets, HabEx will enable a broad range of general astrophysics science enabled by 100 to 2500 nm spectral range and 3 x 3 arc-minute FOV. HabEx is one of four mission concepts currently being studied for the 2020 Astrophysics Decadal Survey.

  20. Computer codes for evaluation of control room habitability (HABIT)

    Energy Technology Data Exchange (ETDEWEB)

    Stage, S.A. [Pacific Northwest Lab., Richland, WA (United States)

    1996-06-01

    This report describes the Computer Codes for Evaluation of Control Room Habitability (HABIT). HABIT is a package of computer codes designed to be used for the evaluation of control room habitability in the event of an accidental release of toxic chemicals or radioactive materials. Given information about the design of a nuclear power plant, a scenario for the release of toxic chemicals or radionuclides, and information about the air flows and protection systems of the control room, HABIT can be used to estimate the chemical exposure or radiological dose to control room personnel. HABIT is an integrated package of several programs that previously needed to be run separately and required considerable user intervention. This report discusses the theoretical basis and physical assumptions made by each of the modules in HABIT and gives detailed information about the data entry windows. Sample runs are given for each of the modules. A brief section of programming notes is included. A set of computer disks will accompany this report if the report is ordered from the Energy Science and Technology Software Center. The disks contain the files needed to run HABIT on a personal computer running DOS. Source codes for the various HABIT routines are on the disks. Also included are input and output files for three demonstration runs.

  1. SMEs’ Purchasing Habits

    Directory of Open Access Journals (Sweden)

    Emre S. Ozmen

    2014-05-01

    Full Text Available Although micro companies overpower the small and medium enterprise (SME segment, generalizations are often with medium size companies, and therefore, there are many unknowns, especially when it comes to its buying behavior. Conformist studies and industry practices assume SMEs to be “normative” or “conservative” buyers; however, this hypothesis is untested. This article aims to scrutinize the reality, and proposes a unified model that rejects pre-containerization in buying behavior typologies, as well as selectiveness in terms of audience type, whether it is corporate, SME, or consumer. While replacing researchers’ perceptions with the audience’s, the model yields actual knowledge that can lead to audience’s beliefs in lieu of the opposite, which is used to mislead stakeholders. The study shows that SMEs also buy like individuals and spend in a similar way to consumers’, including not only “normative” and “conservative” but also “negligent” and “impulse” zones. From the research-implications perspective, future studies by behaviorists can explore why SMEs purchase in this way. Marketers may benefit from the finding that SMEs buy like individuals. In addition, SMEs may want to be conscious of their purchasing habits, and—utilizing the newly introduced “risk score” frontier—policymakers should assess the consequences of these habits at the macro level.

  2. Eating habits of preschool children

    OpenAIRE

    Miloševič, Katja

    2016-01-01

    Children gain their eating habits in the first years of their lives. Therefore it is essential to offer them a variety of food from an early age and to introduce them to healthy eating habits. The purpose of this diploma thesis is to determine what kind of eating habits preschool children have according to their parents' evaluation and whether there are any differences in eating habits between the two age groups (2 and 4-year-olds). 100 questionnaires were distributed to children's parents. T...

  3. Breaking car use habits

    DEFF Research Database (Denmark)

    Thøgersen, John; Møller, Berit Thorup

    2008-01-01

    and consider using-or at least trying-public transport instead. About 1,000 car drivers participated in the experiment either as experimental subjects, receiving a free one-month travelcard, or as control subjects. As predicted, the intervention had a significant impact on drivers' use of public transport...... and it also neutralized the impact of car driving habits on mode choice. However, in the longer run (i.e., four months after the experiment) experimental subjects did not use public transport more than control subjects. Hence, it seems that although many car drivers choose travel mode habitually, their final......Based on calls for innovative ways of reducing car traffic and research indicating that car driving is often the result of habitual decision-making and choice processes, this paper reports on a field experiment designed to test a tool aimed to entice drivers to skip the habitual choice of the car...

  4. Developing Mathematical Habits of Mind

    Science.gov (United States)

    Mark, June; Cuoco, Al; Goldenberg, E. Paul; Sword, Sarah

    2010-01-01

    "Mathematical habits of mind" include reasoning by continuity, looking at extreme cases, performing thought experiments, and using abstraction that mathematicians use in their work. Current recommendations emphasize the critical nature of developing these habits of mind: "Once this kind of thinking is established, students can apply it in the…

  5. Factors Effecting on Study Habits

    Science.gov (United States)

    Khan, Zebun Nisa

    2016-01-01

    The present study was undertaken with the objectives to find out the impact of Socio-economic Status as well as sex differences on study habits of class VII students (100) of Government Colleges of Amroha District. The effects of two independent variables on study habits of the aforementioned students were assessed by using two Psychological tests…

  6. Health Habit: A Concept Analysis.

    Science.gov (United States)

    Opalinski, Andra S; Weglicki, Linda S; Gropper, Sareen S

    2018-01-01

    The aim of this article is to provide clarity of the concept of health habit. Using Walker and Avant's (1983; 2010) method for conducting a concept analysis, the authors identify the attributes and characteristics of health habit, its theoretical and practical application to nursing, and sample cases to further illustrate the concept. Empirical and conceptual literature was used to inform this concept analysis. Articles and one book from 1977 to 2014 were reviewed from PsycINFO, Medline, Cumulative Index to Nursing Health Literature (CINAHL), Science Direct, EBSCOhost and Web of Science. Offering a clear definition and conceptual model of health habit provide the foundation to identify/develop appropriate measures of the concept and guide further investigation of understanding the development and sustainability of healthy habits. Additional research is needed to test the conceptual relationships between health habits and outcome variables as they apply to different groups across the age continuum. © 2017 Wiley Periodicals, Inc.

  7. Dietary habits and hearing.

    Science.gov (United States)

    Rosenhall, Ulf; Idrizbegovic, Esma; Hederstierna, Christina; Rothenberg, Elisabet

    2015-02-01

    Abstract Objective: Study groups from three age cohorts of 70-75 year-olds were investigated to search for possible correlations between dietary habits and auditory function. A cross-sectional, epidemiological study. A total number of 524 people (275 women, 249 men) were recruited from three age cohorts. The study sample was representative of the general population. All participants answered a diet history and were tested with pure-tone audiometry. Eleven categories of food consumption were related to pure-tone averages of low-mid frequency hearing, and high frequency hearing. Two consistent correlations between diet and hearing were observed. One was a correlation between good hearing and a high consumption of fish in the male group. The other was a correlation between poor high frequency hearing and a high consumption of food rich in low molecular carbohydrates in both genders; a larger effect size was seen in females. The study indicates that diet is important for aural health in aging. According to this study fish is beneficial to hearing, whereas consumption of "junk food", rich in low molecular carbohydrates, is detrimental. Other correlations, e.g. between high consumption of antioxidants, were not demonstrated here, but cannot be excluded.

  8. [Sleep habits among adolescents].

    Science.gov (United States)

    Sørensen, E; Ursin, R

    2001-01-30

    Norwegian adolescents report very high-perceived morning sleepiness. Delayed sleep phase may be biologically linked to puberty; adolescents sleep less, but may need more sleep than prepubertal children. The study was designed to investigate sleep habits, circadian rhythm and subjective satisfaction with sleep. Twenty-two high school students, age 17, and parents of 16 primary school pupils, age seven, answered a questionnaire on estimated sleep need, actual time in bed, sleep latency and adequacy of sleep. The average length of nocturnal sleep in the adolescents was 7.3 hrs on weekdays and 10.1 hrs on weekends. They went later to bed and rose earlier than the children, sleeping 1.7 hrs less before schooldays and 1.6 hrs more during the weekend than the 8.5 hrs which were their own sleep estimate. All the children were reported to satisfy their need for sleep, but none of the adolescents reported feeling content. The larger the difference between hours in bed on weekdays and hours in bed on weekends, the more dissatisfaction was observed. The present data suggest that the adolescents were chronic partially sleep deprived and had a tendency toward delayed sleep phase. They did not satisfy their need for sleep as defined by themselves, due to late bedtime throughout the week. Also, the late bedtime and late rise time on weekends maintained or furthered the delayed sleep phase.

  9. Delegation: developing the habit.

    Science.gov (United States)

    Duehring, G L

    2001-01-01

    Often, individuals take personal delegation skills for granted and assume the presence of expertise with the practice of delegation, which may not be the case. Those assumptions can be found at both ends of the process, with the manager and the employee. Every time a manager places an employee in a job and gives him or her a job description or a set of instructions, the manager has delegated. The manager has placed someone in a position to perform operations for which ultimately the manager is responsible. Delegation is both a process and a condition. The process is the act of assigning work to an employee; the condition of delegating a job is a thorough and mutual understanding between the supervisor and the employee of specific results and methods by which these results can be achieved. The condition goes far beyond the simple process of assigning a job. The point at which many managers fail in delegating is in neglecting to move past the process and take the required steps to establish a true condition of delegation. Failure to delegate is the leading cause of managers retarding their professional growth. In the case of a workaholic--someone who fails to learn the value of delegation--the job soon becomes too much, and the effectiveness of the department may suffer. By reducing the burden of technical duties and busy work, managers will find that it is possible to be more effective and actually spend more time managing. A number of the reasons why managers fail to delegate are complex and subconscious, such as insecurity, fear of competition and even fear of not being recognized for accomplishments achieved. Other reasons for failing to delegate are habit and shortages of staff members or time. Delegation is an investment in time. The eventual gain from such an investment, which may temporarily cause the department to fall further behind during a training period, outweighs the costs. The manager is the final authority in such duties as approval, recommendations

  10. Managing away bad habits.

    Science.gov (United States)

    Waldroop, J; Butler, T

    2000-01-01

    We've all worked with highly competent people who are held back by a seemingly fatal personality flaw. One person takes on too much work; another sees the downside in every proposed change; a third pushes people out of the way. At best, people with these "bad habits" create their own glass ceilings, which limit their success and their contributions to the company. At worst, they destroy their own careers. Although the psychological flaws of such individuals run deep, their managers are not helpless. In this article, James Waldroop and Timothy Butler--both psychologists--examine the root causes of these flaws and suggest concrete tactics they have used to help people recognize and correct the following six behavior patterns: The hero, who always pushes himself--and subordinates--too hard to do too much for too long. The meritocrat, who believes that the best ideas can and will be determined objectively and ignores the politics inherent in most situations. The bulldozer, who runs roughshod over others in a quest for power. The pessimist, who always worries about what could go wrong. The rebel, who automatically fights against authority and convention. And the home run hitter, who tries to do too much too soon--he swings for the fences before he's learned to hit singles. Helping people break through their self-created glass ceilings is the ultimate win-win scenario: both the individual and the organization are rewarded. Using the tactics introduced in this article, managers can help their brilliantly flawed performers become spectacular achievers.

  11. El dispositivo habitable

    Directory of Open Access Journals (Sweden)

    La Roche, P. M.

    1999-04-01

    Full Text Available This paper explains the main concepts supporting the project "Habitar el Dispositivo" which was awarded a prize in the International Competition "25 Bioclimatical Houses" promoted by the "Instituto Tecnológico de Energías Renovables of Tenerife " and organized by the "Colegio de Arquitectos de Canarias" and sponsored by the "International Union of Architects". As opposed to bioclimatical houses which are the result of adding bioclimatical devices to an architectural project, the integration of bioclimatical and architectural concepts in a livable device is proposed. A digital model of the project was built to analyze sunlight and shadow behavior and computer simulations permitted to determine thermal performance. Average thermal satisfaction was 89.75 % during typical summer and winter 24 hour periods.

    Se presentan los conceptos fundamentales que respaldan la propuesta "Habitar el Dispositivo", premiada en el Concurso Internacional "25 Viviendas Bioclimáticas" promovido por el "Instituto Tecnológico de Energías Renovables del Cabildo de Tenerife", organizado por el "Colegio de Arquitectos de Canarias" y homologado por la "Unión Internacional de Arquitectos". Al contrario de la solución de añadir dispositivos a un proyecto de arquitectura, la propuesta integra conceptos bioclimáticos y arquitectónicos en un dispositivo habitable. Un modelo digital de la edificación permitió estudiar su volumetría y soleamiento en diferentes períodos del año, mientras que su comportamiento térmico se analizó con un programa de simulación en régimen dinámico. El promedio de personas satisfechas en días típicos de verano e invierno fue del 89,75 %.

  12. Liquid Phase Equilibria for Habitability

    Science.gov (United States)

    Tan, S. P.

    2017-11-01

    The existence of liquid phase, which amplifies habitability, can be predicted using an equation of state from atmospheric composition, pressure, and temperature. If solid is also present, density inversion that keeps liquid from freezing is examined.

  13. Healthy habits for weight loss

    Science.gov (United States)

    ... you or try to tempt you with old eating habits. Send progress reports. Tell your friends your goal weight and send them weekly updates of how you are doing. Use social media. Some mobile apps let you log everything you ...

  14. Poor Sleep Habits = Poor Grades

    Science.gov (United States)

    ... https://medlineplus.gov/news/fullstory_166509.html Poor Sleep Habits = Poor Grades Study of college students finds ... socialize, college life seems geared toward an erratic sleep schedule. But new research suggests that an unpredictable ...

  15. Northern Fur Seal Food Habits

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains food habits samples, usually scats, collected opportunistically on northern fur seal rookeries and haulouts in Alaska from 1987 to present....

  16. REPRODUCTIVE BIOLOGY AND FEEDING HABITS

    African Journals Online (AJOL)

    REPRODUCTIVE BIOLOGY AND FEEDING HABITS. OF THE CATFISH CLARIAS GARIEPINUS (BURCHELL). (PISCES: CLARIIDAE) IN LAKE AWASSA, ETHIOPIA. Elias Dadebo. Department of Animal Production and Rangeland Management. Awassa College of Agriculture, PO Box 5, AWassa, Ethiopia. ABSTRACT: ...

  17. Eating habits of pupils of eighth and ninth grade at elementary school

    OpenAIRE

    RYGLOVÁ, Petra

    2012-01-01

    This diploma thesis describes eating habits of pupils at elementary school. It mainly focuses on results of bad eating habits. The first chapter describes eating habits of pupils. The second chapter characterizes the age group 13 to 16 years. The following chapters are focused on eating disorders (in general and also specifically on anorexia nervosa and bulimia nervosa), individual and social factors influencing the disorder and disease prevention. The practical part informs about the results...

  18. [Occupational stress, coping styles and eating habits among Polish employees].

    Science.gov (United States)

    Potocka, Adrianna; Mościcka, Agnieszka

    2011-01-01

    The aim of the study was to analyze potential relations between occupational stress, coping styles and ing habits. Questionnaires administered to 160 public administration employees allowed for assessing eating habits, occupational stress and coping styles. The eating habits correlated with work stress (ro-Spearman's = 0.17-0.29). More unhealthy eating patterns were observed in employees characterized by a higher level of stress. Such stressors as overload, lack of control over work and inappropriate work organization were especially related to poorer eating habits. Among the analyzed coping styles, focusing on emotions (ro-S = 0.19) and searching for emotional support most significantly correlated with poorer eating behaviors (ro-S = 0.16). There were statistically significant differences in eating habits, depending on the level of job stress (U = 1583.50, p eating more than those with a medium level of job stress. The relationship between subjective assessment of job stress, coping and eating habits has been confirmed. Taking into account the role of stress and coping, as the potential determinants of eating patterns in humans, more attention should be paid to education and promotion of knowledge about the relationship between stress and human eating behaviors to prevent obesity and eating disorders.

  19. COMPARATIVE HABITABILITY OF TRANSITING EXOPLANETS

    Energy Technology Data Exchange (ETDEWEB)

    Barnes, Rory; Meadows, Victoria S.; Evans, Nicole, E-mail: rory@astro.washington.edu [Astronomy Department, University of Washington, Box 951580, Seattle, WA 98195 (United States)

    2015-12-01

    Exoplanet habitability is traditionally assessed by comparing a planet’s semimajor axis to the location of its host star’s “habitable zone,” the shell around a star for which Earth-like planets can possess liquid surface water. The Kepler space telescope has discovered numerous planet candidates near the habitable zone, and many more are expected from missions such as K2, TESS, and PLATO. These candidates often require significant follow-up observations for validation, so prioritizing planets for habitability from transit data has become an important aspect of the search for life in the universe. We propose a method to compare transiting planets for their potential to support life based on transit data, stellar properties and previously reported limits on planetary emitted flux. For a planet in radiative equilibrium, the emitted flux increases with eccentricity, but decreases with albedo. As these parameters are often unconstrained, there is an “eccentricity-albedo degeneracy” for the habitability of transiting exoplanets. Our method mitigates this degeneracy, includes a penalty for large-radius planets, uses terrestrial mass–radius relationships, and, when available, constraints on eccentricity to compute a number we call the “habitability index for transiting exoplanets” that represents the relative probability that an exoplanet could support liquid surface water. We calculate it for Kepler objects of interest and find that planets that receive between 60% and 90% of the Earth’s incident radiation, assuming circular orbits, are most likely to be habitable. Finally, we make predictions for the upcoming TESS and James Webb Space Telescope missions.

  20. Characterization of the K2-18 multi-planetary system with HARPS. A habitable zone super-Earth and discovery of a second, warm super-Earth on a non-coplanar orbit

    Science.gov (United States)

    Cloutier, R.; Astudillo-Defru, N.; Doyon, R.; Bonfils, X.; Almenara, J.-M.; Benneke, B.; Bouchy, F.; Delfosse, X.; Ehrenreich, D.; Forveille, T.; Lovis, C.; Mayor, M.; Menou, K.; Murgas, F.; Pepe, F.; Rowe, J.; Santos, N. C.; Udry, S.; Wünsche, A.

    2017-12-01

    Aims: The bright M2.5 dwarf K2-18 (Ms = 0.36 M⊙, Rs = 0.41 R⊙) at 34 pc is known to host a transiting super-Earth-sized planet orbiting within the star's habitable zone; K2-18b. Given the superlative nature of this system for studying an exoplanetary atmosphere receiving similar levels of insolation as the Earth, we aim to characterize the planet's mass which is required to interpret atmospheric properties and infer the planet's bulk composition. Methods: We have obtained precision radial velocity measurements with the HARPS spectrograph. We then coupled those measurements with the K2 photometry to jointly model the observed radial velocity variation with planetary signals and a correlated stellar activity model based on Gaussian process regression. Results: We measured the mass of K2-18b to be 8.0 ± 1.9M⊕ with a bulk density of 3.3 ± 1.2 g/cm3 which may correspond to a predominantly rocky planet with a significant gaseous envelope or an ocean planet with a water mass fraction ≳50%. We also find strong evidence for a second, warm super-Earth K2-18c (mp,csinic = 7.5 ± 1.3 M⊕) at approximately nine days with a semi-major axis 2.4 times smaller than the transiting K2-18b. After re-analyzing the available light curves of K2-18 we conclude that K2-18c is not detected in transit and therefore likely has an orbit that is non-coplanar with the orbit of K2-18b although only a small mutual inclination is required for K2-18c to miss a transiting configuration; | Δi| 1-2°. A suite of dynamical integrations are performed to numerically confirm the system's dynamical stability. By varying the simulated orbital eccentricities of the two planets, dynamical stability constraints are used as an additional prior on each planet's eccentricity posterior from which we constrain eb < 0.43 and ec < 0.47 at the level of 99% confidence. Conclusions: The discovery of the inner planet K2-18c further emphasizes the prevalence of multi-planet systems around M dwarfs. The

  1. Tidal locking of habitable exoplanets

    Science.gov (United States)

    Barnes, Rory

    2017-10-01

    Potentially habitable planets can orbit close enough to their host star that the differential gravity across their diameters can produce an elongated shape. Frictional forces inside the planet prevent the bulges from aligning perfectly with the host star and result in torques that alter the planet's rotational angular momentum. Eventually the tidal torques fix the rotation rate at a specific frequency, a process called tidal locking. Tidally locked planets on circular orbits will rotate synchronously, but those on eccentric orbits will either librate or rotate super-synchronously. Although these features of tidal theory are well known, a systematic survey of the rotational evolution of potentially habitable exoplanets using classic equilibrium tide theories has not been undertaken. I calculate how habitable planets evolve under two commonly used models and find, for example, that one model predicts that the Earth's rotation rate would have synchronized after 4.5 Gyr if its initial rotation period was 3 days, it had no satellites, and it always maintained the modern Earth's tidal properties. Lower mass stellar hosts will induce stronger tidal effects on potentially habitable planets, and tidal locking is possible for most planets in the habitable zones of GKM dwarf stars. For fast-rotating planets, both models predict eccentricity growth and that circularization can only occur once the rotational frequency is similar to the orbital frequency. The orbits of potentially habitable planets of very late M dwarfs ([InlineEquation not available: see fulltext.]) are very likely to be circularized within 1 Gyr, and hence, those planets will be synchronous rotators. Proxima b is almost assuredly tidally locked, but its orbit may not have circularized yet, so the planet could be rotating super-synchronously today. The evolution of the isolated and potentially habitable Kepler planet candidates is computed and about half could be tidally locked. Finally, projected TESS planets

  2. Tidal locking of habitable exoplanets

    Science.gov (United States)

    Barnes, Rory

    2017-12-01

    Potentially habitable planets can orbit close enough to their host star that the differential gravity across their diameters can produce an elongated shape. Frictional forces inside the planet prevent the bulges from aligning perfectly with the host star and result in torques that alter the planet's rotational angular momentum. Eventually the tidal torques fix the rotation rate at a specific frequency, a process called tidal locking. Tidally locked planets on circular orbits will rotate synchronously, but those on eccentric orbits will either librate or rotate super-synchronously. Although these features of tidal theory are well known, a systematic survey of the rotational evolution of potentially habitable exoplanets using classic equilibrium tide theories has not been undertaken. I calculate how habitable planets evolve under two commonly used models and find, for example, that one model predicts that the Earth's rotation rate would have synchronized after 4.5 Gyr if its initial rotation period was 3 days, it had no satellites, and it always maintained the modern Earth's tidal properties. Lower mass stellar hosts will induce stronger tidal effects on potentially habitable planets, and tidal locking is possible for most planets in the habitable zones of GKM dwarf stars. For fast-rotating planets, both models predict eccentricity growth and that circularization can only occur once the rotational frequency is similar to the orbital frequency. The orbits of potentially habitable planets of very late M dwarfs ([InlineEquation not available: see fulltext.]) are very likely to be circularized within 1 Gyr, and hence, those planets will be synchronous rotators. Proxima b is almost assuredly tidally locked, but its orbit may not have circularized yet, so the planet could be rotating super-synchronously today. The evolution of the isolated and potentially habitable Kepler planet candidates is computed and about half could be tidally locked. Finally, projected TESS planets

  3. The Aristotelian conception of habit and its contribution to human neuroscience.

    Science.gov (United States)

    Bernacer, Javier; Murillo, Jose Ignacio

    2014-01-01

    The notion of habit used in neuroscience is an inheritance from a particular theoretical origin, whose main source is William James. Thus, habits have been characterized as rigid, automatic, unconscious, and opposed to goal-directed actions. This analysis leaves unexplained several aspects of human behavior and cognition where habits are of great importance. We intend to demonstrate the utility that another philosophical conception of habit, the Aristotelian, may have for neuroscientific research. We first summarize the current notion of habit in neuroscience, its philosophical inspiration and the problems that arise from it, mostly centered on the sharp distinction between goal-directed actions and habitual behavior. We then introduce the Aristotelian view and we compare it with that of William James. For Aristotle, a habit is an acquired disposition to perform certain types of action. If this disposition involves an enhanced cognitive control of actions, it can be considered a "habit-as-learning". The current view of habit in neuroscience, which lacks cognitive control and we term "habit-as-routine", is also covered by the Aristotelian conception. He classifies habits into three categories: (1) theoretical, or the retention of learning understood as "knowing that x is so"; (2) behavioral, through which the agent achieves a rational control of emotion-permeated behavior ("knowing how to behave"); and (3) technical or learned skills ("knowing how to make or to do"). Finally, we propose new areas of research where this "novel" conception of habit could serve as a framework concept, from the cognitive enrichment of actions to the role of habits in pathological conditions. In all, this contribution may shed light on the understanding of habits as an important feature of human action. Habits, viewed as a cognitive enrichment of behavior, are a crucial resource for understanding human learning and behavioral plasticity.

  4. The Aristotelian conception of habit and its contribution to human neuroscience

    Directory of Open Access Journals (Sweden)

    Javier eBernacer

    2014-11-01

    Full Text Available The notion of habit used in neuroscience is an inheritance from a particular theoretical origin, whose main source is William James. Thus, habits have been characterized as rigid, automatic, unconscious, and opposed to goal-directed actions. This analysis leaves unexplained several aspects of human behavior and cognition where habits are of great importance. We intend to demonstrate the utility that another philosophical conception of habit, the Aristotelian, may have for neuroscientific research. We first summarize the current notion of habit in neuroscience, its philosophical inspiration and the problems that arise from it, mostly centered on the sharp distinction between goal-directed actions and habitual behavior. We then introduce the Aristotelian view and we compare it with that of William James. For Aristotle, a habit is an acquired disposition to perform certain types of action. If this disposition involves an enhanced cognitive control of actions, it can be considered a habit-as-learning. The current view of habit in neuroscience, which lacks cognitive control and we term habit-as-routine, is also covered by the Aristotelian conception. He classifies habits into three categories: 1 theoretical, or the retention of learning understood as knowing that x is so; 2 behavioral, through which the agent achieves a rational control of emotion-permeated behavior (knowing how to behave; and 3 technical or learned skills (knowing how to make or to do. Finally, we propose new areas of research where this novel conception of habit could serve as a framework concept, from the cognitive enrichment of actions to the role of habits in pathological conditions. In all, this contribution may shed light on the understanding of habits as an important feature of human action. Habits, viewed as cognitively controlled behaviors that in turn improve cognitive control of behavior, are a crucial resource for enhancing human learning and behavioral plasticity.

  5. Dietary habits of a Mediterranean population of women in an ...

    African Journals Online (AJOL)

    The objective of this study was to assess and describe the dietary intake and major food sources of energy and nutrients in a women sample selected from an ... Food habits are characterized by large consumption of cereals, meat and poultry, fish and sea foods, eggs, fruits and vegetables, but low intake of olive oil.

  6. [Health effects of living habits].

    Science.gov (United States)

    Vuori, Ilkka

    2015-01-01

    Single healthy living habits such as non-smoking and regular physical activity decrease the risk of common non-communicable diseases, unsuccessful aging and premature death to a small to moderate degree. Their cumulative effects are, however, large. Only a small minority of people adhere well to all healthy living habits or even the healthiest ones. Consequently, the population attributable fractions of major public health problems due to unhealthy lifestyles are large. Substantial improvement of public health calls for policies and programs to influence the root causes of the lifestyles in the multiple environments and systems where they are developed, maintained, and changed.

  7. HABITABILITY OF EXOMOONS AT THE HILL OR TIDAL LOCKING RADIUS

    Energy Technology Data Exchange (ETDEWEB)

    Hinkel, Natalie R.; Kane, Stephen R., E-mail: natalie.hinkel@gmail.com [NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125 (United States)

    2013-09-01

    Moons orbiting extrasolar planets are the next class of object to be observed and characterized for possible habitability. Like the host-planets to their host-star, exomoons have a limiting radius at which they may be gravitationally bound, or the Hill radius. In addition, they also have a distance at which they will become tidally locked and therefore in synchronous rotation with the planet. We have examined the flux phase profile of a simulated, hypothetical moon orbiting at a distant radius around the confirmed exoplanets {mu} Ara b, HD 28185 b, BD +14 4559 b, and HD 73534 b. The irradiated flux on a moon at its furthest, stable distance from the planet achieves its largest flux gradient, which places a limit on the flux ranges expected for subsequent (observed) moons closer in orbit to the planet. We have also analyzed the effect of planetary eccentricity on the flux on the moon, examining planets that traverse the habitable zone either fully or partially during their orbit. Looking solely at the stellar contributions, we find that moons around planets that are totally within the habitable zone experience thermal equilibrium temperatures above the runaway greenhouse limit, requiring a small heat redistribution efficiency. In contrast, exomoons orbiting planets that only spend a fraction of their time within the habitable zone require a heat redistribution efficiency near 100% in order to achieve temperatures suitable for habitability. This means that a planet does not need to spend its entire orbit within the habitable zone in order for the exomoon to be habitable. Because the applied systems comprise giant planets around bright stars, we believe that the transit detection method is most likely to yield an exomoon discovery.

  8. Effects of Extreme Obliquity Variations on the Habitability of Exoplanets

    Science.gov (United States)

    Armstrong, J. C.; Barnes, R.; Domagal-Goldman, S.; Breiner, J.; Quinn, T. R.; Meadows, V. S.

    2014-01-01

    We explore the impact of obliquity variations on planetary habitability in hypothetical systems with high mutual inclination. We show that large-amplitude, high-frequency obliquity oscillations on Earth-like exoplanets can suppress the ice-albedo feedback, increasing the outer edge of the habitable zone. We restricted our exploration to hypothetical systems consisting of a solar-mass star, an Earth-mass planet at 1 AU, and 1 or 2 larger planets. We verified that these systems are stable for 108 years with N-body simulations and calculated the obliquity variations induced by the orbital evolution of the Earth-mass planet and a torque from the host star. We ran a simplified energy balance model on the terrestrial planet to assess surface temperature and ice coverage on the planet's surface, and we calculated differences in the outer edge of the habitable zone for planets with rapid obliquity variations. For each hypothetical system, we calculated the outer edge of habitability for two conditions: (1) the full evolution of the planetary spin and orbit and (2) the eccentricity and obliquity fixed at their average values. We recovered previous results that higher values of fixed obliquity and eccentricity expand the habitable zone, but we also found that obliquity oscillations further expand habitable orbits in all cases. Terrestrial planets near the outer edge of the habitable zone may be more likely to support life in systems that induce rapid obliquity oscillations as opposed to fixed-spin planets. Such planets may be the easiest to directly characterize with space-borne telescopes.

  9. Habitable Exoplanet Imager Optical Telescope Concept Design

    Science.gov (United States)

    Stahl, H Philip

    2017-01-01

    The Habitable Exoplanet Imaging Mission (HabEx) is one of four missions under study for the 2020 Astrophysics Decadal Survey. Its goal is to directly image and spectroscopically characterize planetary systems in the habitable zone of Sun-like stars. Additionally, HabEx will perform a broad range of general astrophysics science enabled by 100 to 2500 nm spectral range and 3 x 3 arc-minute FOV. Critical to achieving the HabEx science goals is a large, ultra-stable UV/Optical/Near-IR (UVOIR) telescope. The baseline HabEx telescope is a 4-meter off-axis unobscured three-mirror-anastigmatic, diffraction limited at 400 nm with wavefront stability on the order of a few 10s of picometers. This paper summarizes the opto-mechanical design of the HabEx baseline optical telescope assembly, including a discussion of how science requirements drive the telescope's specifications, and presents analysis that the baseline telescope structure meets its specified tolerances.

  10. Habit formation: implications for alcoholism research.

    Science.gov (United States)

    O'Tousa, David; Grahame, Nicholas

    2014-06-01

    Characteristics of individuals with severe alcohol use disorders include heightened cue sensitivity, compulsive seeking, craving, and continued alcohol use in the face of negative consequences. Animal models are useful for understanding behavioral and neurological mechanisms underlying problematic alcohol use. Seeking of operant reinforcers including alcohol is processed by two mechanisms, commonly referred to as "goal-directed" (action-outcome) and "habitual" (stimulus-response). As substance use disorders are characterized by continued use regardless of unfavorable outcomes, it is plausible that drug use causes an unnatural disruption of these mechanisms. We present a critical analysis of literature pertaining to behavioral neuroscience alcoholism research involving habit formation. Traditionally, when operant behavior is unaffected by a loss of subjective value of a reinforcer (devaluation), the behavior is considered habitual. Acquisition of instrumental behavior requires corticostriatal mechanisms that depend heavily on the prefrontal cortex and ventral striatum, whereas practiced behavior is more predominantly controlled by the dorsal striatum. Dopaminergic signaling is necessary for the neurological adaptations involved in stimulus-response action, and drugs of abuse appear to facilitate habitual behavior through high levels of dopamine release. Evidence suggests that the use of alcohol as a reinforcer expedites habit formation, and that a history of alcohol use produces alterations in striatal morphology, aids habit learning for non-psychoactive reinforcers, and promotes alcohol drinking despite aversive adulterants. In this review, we suggest directions for future alcoholism research that seeks to measure action made despite a devalued outcome, including procedural modifications and genotypic, pharmacological, or neurological manipulations. Most alcoholism models currently in use fail to reach substantial blood ethanol concentrations, a shortcoming that

  11. Habit in Personality and Social Psychology.

    Science.gov (United States)

    Wood, Wendy

    2017-11-01

    Habits are largely absent from modern social and personality psychology. This is due to outdated perspectives that placed habits in conflict with goals. In modern theorizing, habits are represented in memory as implicit context-response associations, and they guide responding in conjunction with goals. Habits thus have important implications for our field. Emerging research shows that habits are an important mechanism by which people self-regulate and achieve long-term goals. Also, habits change through specific interventions, such as changes in context cues. I speculate that understanding of habits also holds promise for reducing intergroup discrimination and for understanding lay theories of the causes for action. In short, by recognizing habit, the field gains understanding of a central mechanism by which actions persist in daily life.

  12. Changing Your Habits: Steps to Better Health

    Science.gov (United States)

    ... Related Topics Section Navigation Diet & Nutrition Celebrate the Beauty of Youth Changing Your Habits for Better Health ... don’t have time to cook. Healthy habits cost too much. You can walk around the mall, ...

  13. Weight Loss: Ready to Change Your Habits?

    Science.gov (United States)

    ... the challenge of overhauling your eating and exercise habits. Instead, consider giving your life a chance to ... lose weight more quickly if you change your habits significantly. Be careful, though. Radical changes that aren' ...

  14. Teaching Your Child Healthy Hair Care Habits

    Science.gov (United States)

    ... 0; c Teaching your child healthy hair care habits Many common hair care practices can lead to ... conditioner. Teaching your child other healthy hair care habits Many things that we do to style our ...

  15. Using Optogenetics to Study Habits

    Science.gov (United States)

    Smith, Kyle S.; Graybiel, Ann M.

    2013-01-01

    It is now well documented that optogenetics brings to neuroscience a long sought-after foothold to study the causal role of millisecond-scale activity of genetically or anatomically defined populations of neurons. Progress is rapid, and, as evidenced by the work collected in this Special Issue, the possibilities of what can now be done are almost dizzying. Even for those concerned with complex phenomena, such as behavioral habits and flexibility, signs are that we could be on the threshold of a leap in scientific understanding. In this article, we note this special time in neuroscience by the example of our use of optogenetics to study habitual behavior. We present a basic sketch of the neural circuitry of habitual behavior built mainly on findings from experiments in which lesion and drug microinjection techniques were employed in combination with sophisticated behavioral analysis. We then outline the types of questions that now can be approached through the use of optogenetic approaches, and, as an example, we summarize the results of a recent study of ours in which we took this approach to probe the neural basis of habit formation. With optogenetic methods, we were able to demonstrate that a small site in the medial prefrontal cortex can control habits on-line during their execution, and we were able to control new habits when they competed with prior ones. The nearly immediate effect of disabling this site optogenetically suggests the existence of a mechanism for moment-to-moment monitoring of behaviors that long have been thought to be almost automatic and reflexive. This example highlights the kind of new knowledge that can be gained by the carefully timed use of optogenetic tools. PMID:23313580

  16. [Significance of bad habits in orthodontics].

    Science.gov (United States)

    Tarján, Ildikó

    2002-08-01

    The author is concerned with the etiological role of bad habits in the development. Disturbances caused by pacifier habits, finger sucking, various forms of swallowing habits and their therapeutical possibilities are discussed. The role of mouth breathing, nail biting, bruxism and self-mutilation in development of anomalies and their therapy are also mentioned. The attention is called to the fact that dentists have responsibility and task to diagnose as early as can be the oral bad habits and that the adequate therapy in time in co-operation with other specialists helping the child get out of bad habits, preventing the development of severe anomaly.

  17. Planning to break unwanted habits: habit strength moderates implementation intention effects on behaviour change.

    Science.gov (United States)

    Webb, Thomas L; Sheeran, Paschal; Luszczynska, Aleksandra

    2009-09-01

    Implementation intention formation promotes effective goal striving and goal attainment. However, little research has investigated whether implementation intentions promote behaviour change when people possess strong antagonistic habits. Experiment 1 developed relatively habitual responses that, after a task switch, had a detrimental impact on task performance. Forming an if-then plan reduced the negative impact of habit on performance. However, the effect of forming implementation intentions was smaller among participants who possessed strong habits as compared to participants who had weaker habits. Experiment 2 provided a field test of the role of habit strength in moderating the relationship between implementation intentions and behaviour in the context of smoking. Implementation intentions reduced smoking among participants with weak or moderate smoking habits, but not among participants with strong smoking habits. In summary, habit strength moderates the effectiveness of if-then plan formation in breaking unwanted habits.

  18. A roadmap towards habitable exoplanets by the Blue Dots Initiative

    Science.gov (United States)

    Coudé du Foresto, V.

    2011-11-01

    This paper is an abridged version of the report produced by the Blue Dots initiative, whose activities include the elaboration of a roadmap towards the spectroscopic characterization of habitable exoplanets. The full version of the Blue Dots report can be downloaded at http://www.blue-dots.net/spip.php?article105. While the roadmap will need to be updated regularly, it is expected that the methodology developed within Blue Dots will provide a durable framework for the elaboration of future revisions.

  19. Host Star Evolution for Planet Habitability.

    Science.gov (United States)

    Gallet, Florian; Charbonnel, Corinne; Amard, Louis

    2016-11-01

    With about 2000 exoplanets discovered within a large range of different configurations of distance from the star, size, mass, and atmospheric conditions, the concept of habitability cannot rely only on the stellar effective temperature anymore. In addition to the natural evolution of habitability with the intrinsic stellar parameters, tidal, magnetic, and atmospheric interactions are believed to have strong impact on the relative position of the planets inside the so-called habitable zone. Moreover, the notion of habitability itself strongly depends on the definition we give to the term "habitable". The aim of this contribution is to provide a global and up-to-date overview of the work done during the last few years about the description and the modelling of the habitability, and to present the physical processes currently includes in this description.

  20. ISS Habitability Data Collection and Preliminary Findings

    Science.gov (United States)

    Thaxton, Sherry (Principal Investigator); Greene, Maya; Schuh, Susan; Williams, Thomas; Archer, Ronald; Vasser, Katie

    2017-01-01

    Habitability is the relationship between an individual and their surroundings (i.e. the interplay of the person, machines, environment, and mission). The purpose of this study is to assess habitability and human factors on the ISS to better prepare for future long-duration space flights. Scheduled data collection sessions primarily require the use of iSHORT (iPad app) to capture near real-time habitability feedback and analyze vehicle layout and space utilization.

  1. Social determinants of dietary habits in Denmark

    DEFF Research Database (Denmark)

    Groth, Margit Velsing; Fagt, Sisse; Brøndsted, L.

    2001-01-01

    significantly associated with the intake of fruit and vegetables. Conclusions: Education seems to be the most important social variable to explain social differences in dietary habits. Additional variables are needed to explain dietary habits of women. Differences are seen for both foods and nutrients....... Sponsorship: The data analysis was financially supported by the Health Insurance Fund. Descriptors: socioeconomic status; education; dietary habits; diet surveys, E%; fat, fruit and vegetables....

  2. Catering habits of schoolchildren junior school

    OpenAIRE

    OVÁDKOVÁ, Lucie

    2013-01-01

    This bachelor thesis called Catering habits of schoolchildren junior school is focused on making of eating habits of primary school pupils. The theoretical part of the thesis analyzed current view of nutrition and quality of food and their role in making of eating habits. It describes basic ingredients of nutrition, the importance of immunology and healthy life style. It is also focused on hazardous food, such as allergenic food, additives and dyes in food. The practical part of the thesis is...

  3. Chewing Habits Among Rural Women In Pondicherry

    Directory of Open Access Journals (Sweden)

    Jagadeesan M

    1997-01-01

    Full Text Available Research question: 1. What is the prevalence of chewing habits among rural women? 2. What are the factors associated with their use? Objectives: To find out the prevalence of chewing habits and correlates of chewing habits. Design: Cross- sectional descriptive study. Participants: Females aged 15 years and above. Study variables: Age, educational status, marital status, occupation, income, type of family, age of starting habitual chewing persons influencing chewing habits and reasons for continuing the habit. Outcome variable : Chewing habits. Statistical analysis: Chi- square test, Analysis of variance. Odds ratio and Logistic regression. Results: The prevalence of chewing betel quid was 24.6% betel quid with tobacco 13.7% and betel nut 0.2%. Mean age of starting betel quid was 22.7 years and betel quid with tobacco, 16.5 years. Friends were the most influencing persons of starting the habit. The most common reasons for continuing were craving for the substances. There was direct relationship of chewing habits with age and inverse relationship with educational status. The chewing habits were more prevalent among married women and women engaged as agricultural labourers. Conclusion: Chewing betel quid with or without tobacco is a common practice among rural women. It is influenced by socio- cultural factors.

  4. A quantitative analysis of reading habits

    OpenAIRE

    Victor Fernandez-Blanco; Juan Prieto-Rodriguez; Javier Suarez-Pandiello

    2015-01-01

    In this paper, reading leisure habits in Spain are analysed as part of the consumers’ decision process under a general framework of time allocation and emphasizing the role of cultural background. We use the Survey on Cultural Habits and Practices in Spain 2010-2011 to analyse the factors influencing reading habits, measured by the number of books read, and using a Zero Inflated Binomial Negative model. Time restrictions are a relevant barrier for reading habits. Female and educated people ...

  5. Endocannabinoid signaling is critical for habit formation

    Directory of Open Access Journals (Sweden)

    Monica R. F Hilário

    2007-11-01

    Full Text Available Extended training can induce a shift in behavioral control from goal-directed actions, which are governed by action-outcome contingencies and sensitive to change in the expected value of the outcome, to habits which are less dependent on action-outcome relations and insensitive to changes in outcome value. Previous studies in rats have shown that interval schedules of reinforcement favor habit formation while ratio schedules favor goal-directed behavior. However, the molecular mechanisms underlying habit formation are not well understood. Endocannabinoids, which can function as retrograde messengers acting through presynaptic CB1 receptors, are highly expressed in the dorsolateral striatum, a key region involved in habit formation. Using a reversible devaluation paradigm, we confirmed that in mice random interval schedules also favor habit formation compared with random ratio schedules. We also found that training with interval schedules resulted in a preference for exploration of a novel lever, whereas training with ratio schedules resulted in less generalization and more exploitation of the reinforced lever. Furthermore, mice carrying either a heterozygous or a homozygous null mutation of the cannabinoid receptor type I (CB1 showed reduced habit formation and enhanced exploitation. The impaired habit formation in CB1 mutant mice cannot be attributed to chronic developmental or behavioral abnormalities because pharmacological blockade of CB1 receptors specifically during training also impairs habit formation. Taken together our data suggest that endocannabinoid signaling is critical for habit formation.

  6. Oral hygiene and smoking habit as risk factors of periodontal disease.

    OpenAIRE

    Maricela Seijo Machado; Marta M. Bosch Pons; Esther M. Castillo Betancourt; Sahily Espino Otero; Alicia Quiñones Betancourt

    2009-01-01

    Background: Peridontal diseases are among the most common diseases affecting human beings, and these are more frequent after the age of 35. Smoking habit is one of the risk factors usually linked with the development of these diseases. Objective: To characterize the relation between periodontal condition and buccal hygiene in patients with smoking habit. Method: Descriptive, cross-sectional, epidemiological study including 95 smokers from Palmira municipality; January-November, 2007. Peridont...

  7. Do habits always override intentions? Pitting unhealthy snacking habits against snack-avoidance intentions.

    Science.gov (United States)

    Gardner, Benjamin; Corbridge, Sharon; McGowan, Laura

    2015-01-01

    Habit is defined as a process whereby an impulse towards behaviour is automatically initiated upon encountering a setting in which the behaviour has been performed in the past. A central tenet of habit theory is that habit overrides intentional tendencies in directing behaviour, such that as habit strength increases, intention becomes less predictive of behaviour. Yet, evidence of this effect has been methodologically limited by modelling the impact of positively-correlated habits and intentions. This study sought to test the effect of habits for unhealthy snacking on the relationship between intentions to avoid unhealthy snacks and snack intake. Methods were chosen to match those used in studies that have shown habit-intention interactions. 239 adults completed valid and reliable measures of habitual snacking and intention to avoid snacking at baseline, and a self-report measure of snack intake two weeks later. Data were analysed using multiple regression. While both habit and intention independently predicted snack intake, no interaction between habit and intention was found. No support was found for the expected moderating impact of habit on the intention-behaviour relationship, indicating that individuals with intentions can act on those intentions despite having habits. Previous evidence of a habit-intention interaction effect may be unreliable. A growing literature indicates that habitual tendencies can be inhibited, albeit with difficulty. Habits and intentions may vary in the influence they exert over discrete behaviour instances. While the aggregation of behaviours across instances and individuals used in our study reflects the dominant methodology in habit research, it precludes examination of effects of in-situ habits and intentions. More sophisticated data collection and analysis methods may be needed to better understand potential habit-intention interactions.

  8. Exoplanets Detection, Formation, Properties, Habitability

    CERN Document Server

    Mason, John W

    2008-01-01

    This edited, multi-author volume will be an invaluable introduction and reference to all key aspects in the field of exoplanet research. The reviews cover: Detection methods and properties of known exoplanets, Detection of extrasolar planets by gravitational microlensing. The formation and evolution of terrestrial planets in protoplanetary and debris disks. The brown dwarf-exoplanet connection. Formation, migration mechanisms and properties of hot Jupiters. Dynamics of multiple exoplanet systems. Doppler exoplanet surveys. Searching for exoplanets in the stellar graveyard. Formation and habitability of extra solar planets in multiple star systems. Exoplanet habitats and the possibilities for life. Moons of exoplanets: habitats for life. Contributing authors: •Rory Barnes •David P. Bennett •Jian Ge •Nader Haghighipour •Patrick Irwin •Hugh Jones •Victoria Meadows •Stanimir Metchev •I. Neill Reid •George Rieke •Caleb Scharf •Steinn Sigurdsson

  9. [Food habits among HIV patients].

    Science.gov (United States)

    Parrilla Saldaña, Josefa; Muñoz Sánchez, Isabel; Peñalver Jiménez, Carmen; Castro Rodríguez, Encarnación; Quero Haro, Antonia; Largo García, Esperanza

    2003-01-01

    The authors analyze the eating habits of a group of 108 patients suffering from HIV. The authors elaborate a chart about the composition and distribution of foods which contains all the required food groups necessary for a complete diet. This food chart lists the variable of this study as well as the frequency of their consummation. Once this chart was drawn up, it was approved by the Nutrition and Dietetic Unit at the Virgen de Valma University Hospital. Among the results obtained, there is a relationship between the necessity these patients have regarding eating a complete diet and diverse nutrients that are easy to chew as well as an abundance of liquids. The article "Nutrition for Patients suffering from HIV" written by the same authors published in the Revista ROL de Enfermera 2002; 25(12):816-820, is recommended in order to have a more complete understanding of this topic, nutrition for patients suffering from HIV.

  10. Disrupting the habit of interviewing

    Directory of Open Access Journals (Sweden)

    Eileen Honan

    2014-06-01

    Full Text Available This paper contributes to the growing domain of ‘post-qualitative’ research and experiments with a new (representational form to move away from traditional and clichéd descriptions of research methods. In this paper, I want to interrogate the category of interview, and the habit of interviewing, to disrupt the clichés, so as to allow thinking of different ways of writing/speaking/representing the interactions between researcher and researched that will breathe new life into qualitative inquiries. I will attempt to flatten and shred, destabilise and disrupt our common-sense ideas about interview, including those held most sacred to the qualitative community, that of anonymity and confidentiality, as well as the privilege of the ‘transcript’ in re-presenting interview data.

  11. Habitable planets with high obliquities.

    Science.gov (United States)

    Williams, D M; Kasting, J F

    1997-01-01

    Earth's obliquity would vary chaotically from 0 degrees to 85 degrees were it not for the presence of the Moon (J. Laskar, F. Joutel, and P. Robutel, 1993, Nature 361, 615-617). The Moon itself is thought to be an accident of accretion, formed by a glancing blow from a Mars-sized planetesimal. Hence, planets with similar moons and stable obliquities may be extremely rare. This has lead Laskar and colleagues to suggest that the number of Earth-like planets with high obliquities and temperate, life-supporting climates may be small. To test this proposition, we have used an energy-balance climate model to simulate Earth's climate at obliquities up to 90 degrees. We show that Earth's climate would become regionally severe in such circumstances, with large seasonal cycles and accompanying temperature extremes on middle- and high-latitude continents which might be damaging to many forms of life. The response of other, hypothetical, Earth-like planets to large obliquity fluctuations depends on their land-sea distribution and on their position within the habitable zone (HZ) around their star. Planets with several modest-sized continents or equatorial supercontinents are more climatically stable than those with polar supercontinents. Planets farther out in the HZ are less affected by high obliquities because their atmospheres should accumulate CO2 in response to the carbonate-silicate cycle. Dense, CO2-rich atmospheres transport heat very effectively and therefore limit the magnitude of both seasonal cycles and latitudinal temperature gradients. We conclude that a significant fraction of extrasolar Earth-like planets may still be habitable, even if they are subject to large obliquity fluctuations.

  12. The Habitability of the Moon

    Science.gov (United States)

    Herczeg, Tibor

    Following the vague guesswork of some writers in antiquity, early telescopic astronomy was strongly preoccupied with the ``World in the Moone.'' About the same time, as Kepler's charming ``Dream'' appeared posthumously, Wilkins set out to prove that there was no contradiction ``with reason or faith'' if we assumed the habitability of the Moon. For about two hundred years, this hypothesis remained quite popular (Cyrano, Fontenelle, Huygens) particularly among the wider public. That in spite of the reverberations, for instance, of the Whewell-Brewster controversy over the habitability of planets, now largely forgotten. On this background, the success of the famous ``Moon hoax of 1835'' seems more understandable. It was only in the middle of the 19th century that this idea began to slowly fade as the lack of lunar atmosphere became more and more obvious. The scientific evidence was mainly in connection with the lunar occultations (Bessel, John Herschel, and others), and also with the well-observed total solar eclipse of 1842. Yet, even later, rather fanciful assumptions about the lunar atmosphere collecting on the invisible far side of the Moon kept a modicum of believability alive for some years. Ultimately, however, the ``Selenites'' wandered over into the domain of science fiction -- the best representative being perhaps Wells' utopia in the ``First Men on the Moon'' exploring the inside of the Moon. The scientific studies concentrated more on the rather frustrating topic of lunar surface variations such as the disappearance of the crater Linnae. Nevertheless, as late as the 1960's, a possibly overly cautious NASA was ready to quarantine the returning Apollo astronauts, paying homage, perhaps, to the panspermia hypothesis.

  13. The Feeding Habits of Mesosauridae

    Science.gov (United States)

    Silva, Rivaldo R.; Ferigolo, Jorge; Bajdek, Piotr; Piñeiro, Graciela

    2017-03-01

    Mesosauridae comprises the oldest known aquatic amniotes which lived in Gondwana during the Early Permian. Previous work in the Uruguayan mesosaur-bearing Mangrullo Formation suggested that mesosaurids lived in an inland water body, inferred as moderately hypersaline, with exceptional preservational conditions that justified describing these strata as a Fossil-Lagerstätte. Exquisitely preserved articulated mesosaur skeletons, including gastric content and associated coprolites, from the Brazilian Iratí Formation in the State of Goiás (central-western Brazil) indicate excellent conditions of preservation, extending the Konservat-Lagerstätte designation to both units in the Paraná Basin. The near-absence of more resistant fossil remains, like actinopterygian and temnospondyl bones, demonstrates the faunistic poverty of the mesosaur-bearing “salty sea”. Our studies of the alimentary habits of mesosaurids through the use of stereoscopic microscopy, light and electronic microscopy, and X-ray diffractometry suggest that the diet of mesosaurids was predominantly composed of pygocephalomorph crustaceans (possibly not exceeding 20 mm in length). However, the presence of bones and bone fragments of small mesosaurs in the gastric content, cololites, coprolites, and possible regurgitalites may also indicate cannibalistic and/or scavenging habits. Cannibalism is relatively common among vertebrates, particularly during conditions of environmental stress, like food shortage. Likewise, the apparent abundance of pygocephalomorph crustacean fossils in the Iratí and Mangrullo Formations, outside and within the studied gastric, cololite, and coprolite contents, might have to do with environmental stress possibly caused by volcanic activity, in particular ash spread into the basin during the Early Permian. In this context, casual necrophagy on the dead bodies of small mesosaurs and large pygocephalomorphs might have been an alternative alimentary behavior adopted for survival

  14. Habitability of the Paleo-Earth as a Model for Earth-like Exoplanets

    Science.gov (United States)

    Mendez, A.

    2013-05-01

    the habitability of Earth for more extended periods. The evolution of terrestrial habitability may be used to recognize and characterize similar features on future observations of Earth-like exoplanets. Habitability of Earth during the Phanerozoic as measured by two methods, the Relative Vegetation Density (RVD) and the Standard Primary Habitability (SPH). Future observations of exoplanets might provide estimates of the SPH that could be compared to Earth.

  15. Inculcating reading habits among Nigerian secondary schools ...

    African Journals Online (AJOL)

    This paper looks at reading habit as process of imbibing a culture of educating, informing and enlightening people. Inculcating reading habit is very essential for the academic achievement of children and this is made possible with the help of trained and qualified teachers who help in guiding children in developing the right ...

  16. Smoking habits of oil refinery employees.

    Science.gov (United States)

    Van Peenen, P F; Blanchard, A G; Wolkonsky, P M

    1984-01-01

    Smoking habits of White male employees of a large oil company were analyzed. There were only slight differences in smoking habits between refinery and nonrefinery employees. Salaried employees, both at refineries and elsewhere, smoked much less than hourly employees. PMID:6507698

  17. Tides and the evolution of planetary habitability.

    Science.gov (United States)

    Barnes, Rory; Raymond, Sean N; Jackson, Brian; Greenberg, Richard

    2008-06-01

    Tides raised on a planet by the gravity of its host star can reduce the planet's orbital semi-major axis and eccentricity. This effect is only relevant for planets orbiting very close to their host stars. The habitable zones of low-mass stars are also close in, and tides can alter the orbits of planets in these locations. We calculate the tidal evolution of hypothetical terrestrial planets around low-mass stars and show that tides can evolve planets past the inner edge of the habitable zone, sometimes in less than 1 billion years. This migration requires large eccentricities (>0.5) and low-mass stars ( less or similar to 0.35 M(circle)). Such migration may have important implications for the evolution of the atmosphere, internal heating, and the Gaia hypothesis. Similarly, a planet that is detected interior to the habitable zone could have been habitable in the past. We consider the past habitability of the recently discovered, approximately 5 M(circle) planet, Gliese 581 c. We find that it could have been habitable for reasonable choices of orbital and physical properties as recently as 2 Gyr ago. However, when constraints derived from the additional companions are included, most parameter choices that indicate past habitability require the two inner planets of the system to have crossed their mutual 3:1 mean motion resonance. As this crossing would likely have resulted in resonance capture, which is not observed, we conclude that Gl 581 c was probably never habitable.

  18. Bringing Exoplanet Habitability Investigations to High School

    Science.gov (United States)

    Woody, Mary Anne; Sohl, Linda

    2016-01-01

    Habitability, a.k.a. habitat suitability, is a topic typically discussed in Biology class. We present here a curriculum unit that introduces the topic of global-scale planetary habitability in a Physics classroom, allowing students to emulate the process of doing cutting-edge science and re-framing an otherwise "typical" physics unit in a more engaging and interactive way.

  19. Habit formation, surplus consumption and return predictability

    DEFF Research Database (Denmark)

    Engsted, Tom; Hyde, Stuart; Vinther Møller, Stig

    2010-01-01

    On an international post World War II dataset, we use an iterated GMM procedure to estimate and test the Campbell and Cochrane (1999, By force of habit: a consumption-based explanation of aggregate stock market behavior. Journal of Political Economy 107, 205–251.) habit formation model with a time...

  20. Genetic Influences on Adolescent Eating Habits

    Science.gov (United States)

    Beaver, Kevin M.; Flores, Tori; Boutwell, Brian B.; Gibson, Chris L.

    2012-01-01

    Behavioral genetic research shows that variation in eating habits and food consumption is due to genetic and environmental factors. The current study extends this line of research by examining the genetic contribution to adolescent eating habits. Analysis of sibling pairs drawn from the National Longitudinal Study of Adolescent Health (Add Health)…

  1. The 5 Habits of Effective PLCs

    Science.gov (United States)

    Easton, Lois Brown

    2015-01-01

    This article describes the knowledge and skills that professional learning community members need to create a habit out of their desire. Habits serve educators as signposts of progress toward achieving their desires. They are interim indicators of a professional learning community's success. Ultimately, of course, professional learning communities…

  2. Disorders of compulsivity: a common bias towards learning habits.

    Science.gov (United States)

    Voon, V; Derbyshire, K; Rück, C; Irvine, M A; Worbe, Y; Enander, J; Schreiber, L R N; Gillan, C; Fineberg, N A; Sahakian, B J; Robbins, T W; Harrison, N A; Wood, J; Daw, N D; Dayan, P; Grant, J E; Bullmore, E T

    2015-03-01

    Why do we repeat choices that we know are bad for us? Decision making is characterized by the parallel engagement of two distinct systems, goal-directed and habitual, thought to arise from two computational learning mechanisms, model-based and model-free. The habitual system is a candidate source of pathological fixedness. Using a decision task that measures the contribution to learning of either mechanism, we show a bias towards model-free (habit) acquisition in disorders involving both natural (binge eating) and artificial (methamphetamine) rewards, and obsessive-compulsive disorder. This favoring of model-free learning may underlie the repetitive behaviors that ultimately dominate in these disorders. Further, we show that the habit formation bias is associated with lower gray matter volumes in caudate and medial orbitofrontal cortex. Our findings suggest that the dysfunction in a common neurocomputational mechanism may underlie diverse disorders involving compulsion.

  3. The habitability of a stagnant-lid Earth

    Science.gov (United States)

    Tosi, N.; Godolt, M.; Stracke, B.; Ruedas, T.; Grenfell, J. L.; Höning, D.; Nikolaou, A.; Plesa, A.-C.; Breuer, D.; Spohn, T.

    2017-09-01

    Context. Plate tectonics is considered a fundamental component for the habitability of the Earth. Yet whether it is a recurrent feature of terrestrial bodies orbiting other stars or unique to the Earth is unknown. The stagnant lid may rather be the most common tectonic expression on such bodies. Aims: To understand whether a stagnant-lid planet can be habitable, I.e. host liquid water at its surface, we model the thermal evolution of the mantle, volcanic outgassing of H2O and CO2, and resulting climate of an Earth-like planet lacking plate tectonics. Methods: We used a 1D model of parameterized convection to simulate the evolution of melt generation and the build-up of an atmosphere of H2O and CO2 over 4.5 Gyr. We then employed a 1D radiative-convective atmosphere model to calculate the global mean atmospheric temperature and the boundaries of the habitable zone (HZ). Results: The evolution of the interior is characterized by the initial production of a large amount of partial melt accompanied by a rapid outgassing of H2O and CO2. The maximal partial pressure of H2O is limited to a few tens of bars by the high solubility of water in basaltic melts. The low solubility of CO2 instead causes most of the carbon to be outgassed, with partial pressures that vary from 1 bar or less if reducing conditions are assumed for the mantle to 100-200 bar for oxidizing conditions. At 1 au, the obtained temperatures generally allow for liquid water on the surface nearly over the entire evolution. While the outer edge of the HZ is mostly influenced by the amount of outgassed CO2, the inner edge presents a more complex behaviour that is dependent on the partial pressures of both gases. Conclusions: At 1 au, the stagnant-lid planet considered would be regarded as habitable. The width of the HZ at the end of the evolution, albeit influenced by the amount of outgassed CO2, can vary in a non-monotonic way depending on the extent of the outgassed H2O reservoir. Our results suggest that

  4. Real Business-cycle Model with Habits

    DEFF Research Database (Denmark)

    Khorunzhina, Natalia

    2015-01-01

    This paper empirically investigates the ability of a real business-cycle model with nonseparabilities in consumption and leisure and external habits both in consumption and leisure to fit the postwar US data. The results indicate a strong but fast-dying habit in leisure, and a somewhat weaker...... but more persistent habit in consumption. Intratemporal nonseparabilities in consumption and leisure play an important role in driving the response of real variables to a productivity shock. Adding capital adjustment costs to the model with nonseparabilities in consumption and leisure and external habits...... both in consumption and leisure changes the responses of real variables to a productivity shock, however, in a way similar to that documented for the models with capital adjustment costs and habit formation in consumption. The estimated persistence of the productivity shock is quite modest, which may...

  5. UV Habitable Zones Further Constrain Possible Life

    Science.gov (United States)

    Kohler, Susanna

    2017-02-01

    Where should we search for life in the universe? Habitable zones are traditionallydetermined based on the possibility of liquid water existing on a planet but ultraviolet (UV) radiation also plays a key role.The UV Habitable ZoneSchematic showing how the traditional habitable zones location and width changes around different types of stars. The UV habitable zone also hasdifferent locations and widths depending on the mass and metallicity of the star. [NASA/Kepler Mission/Dana Berry]Besides the presence of liquid water, there are other things life may need to persist. For life as we know it, one important elementis moderate UV radiation: if a planet receives too little UV flux, many biological compounds cant be synthesized. If it receives too much, however, then terrestrial biological systems (e.g. DNA) can be damaged.To determinethe most likely place to findpersistent life, we should therefore look for the region where a stars traditional habitable zone, within which liquid water is possible, overlaps with its UV habitable zone, within which the UV flux is at the right level to support life.Relationship between the stellar mass and location of the boundaries of the traditional and UV habitable zones for a solar-metallicity star. din and dout denote inner and outer boundaries, respectively. ZAMS and TMS denote when the star joins and leaves the main sequence, respectively. The traditional and UV habitable zones overlap only for stars of 11.5 solar masses. [Adapted from Oishi and Kamaya 2016]Looking for OverlapIn a recent study, two scientists from the National Defense Academy of Japan, Midori Oishi and Hideyuki Kamaya, explored howthe location of this UV habitable zone and that of its overlap with the traditional habitable zone might be affected by a stars mass and metallicity.Oishi and Kamaya developed a simple evolutional model of the UV habitable zone in stars in the mass range of 0.084 solar masses with metallicities of roughly solar metallicity (Z=0.02), a

  6. URGENSI STRATEGI DISPOSITION HABITS OF MIND MATEMATIS

    Directory of Open Access Journals (Sweden)

    Bety Miliyawati

    2014-09-01

    Full Text Available ABSTRAK Kebiasaan berpikir (habits of mind memiliki peranan penting dalam proses pembelajaran dan perkembangan individu dalam membantu memecahkan masalah. Habits Of Mind (HOM adalah kebiasaan berpikir secara fleksibel, mengelola secara empulsif, mendengarkan dengan empati, membiasakan mengajukan pertanyaan, kebiasaan menyelesaikan masalah secara efektif, membiasakan menggunakan pengetahuan masa lalu untuk situasi baru, membiasakan berkomunikasi, berpikir jernih dengan tepat, menggunakan semua indera ketika mengumpulkan informasi, mencoba cara berbeda dan menghasilkan ide-ide yang baru, kebiasaan untuk merespon, kebiasaan untuk mengambil resiko, biasa bertanggung jawab, memiliki rasa humor, membiasakan berpikir interaktif dengan orang lain, bersikap terbuka dan mencoba terus-menerus. Hal ini sejalan dengan tujuan Kurikulum 2013, yaitu mempersiapkan generasi bangsa agar memiliki kemampuan hidup sebagai pribadi dan warga negara yang produktif, kreatif, inovatif, dan afektif. Artikel ini dikaji didasarkan atas analisis terhadap: (1 karakteristik matematika, (2 habits of mind matematis, dan (3 disposition contoh strategi HOM dalam pembelajaran matematika yang dikembangkan pada siswa. Kata Kunci    : Pembelajaran, Karakteristik Matematika, Habits of Mind Matematis   ABSTRACT Habits of mind have an important role in the learning process and the development of individuals in helping to solve the problem. Habits Of Mind (HOM is the habit of thinking flexibly, manage empulsif, listening with empathy, get used to ask questions, solve problems effectively habit, the habit of using past knowledge to new situations, to get used to communicate, think clearly, precisely, using all the senses when gathering information, trying different ways and generate new ideas, habits to respond, the habit to take risks, the usual charge, have a sense of humor, familiarize interactive thinking with others, be open and try constantly. This is in line with the curriculum

  7. Healthy eating habits protect against temptations.

    Science.gov (United States)

    Lin, Pei-Ying; Wood, Wendy; Monterosso, John

    2016-08-01

    Can healthy food-choice habits protect people against temptations of consuming large portion sizes and unhealthy foods? In two studies, we show that the answer is yes, good habits serve this protective role, at least in contexts in which people are not deliberating and thus fall back on habitual responses. In the first study, participants trained with unhealthy habits to approach eating chocolate, but not those trained with healthy habits, succumbed to temptation and ate more chocolates when their self-control resources were depleted. Study 2 extended and clarified these findings by demonstrating the role of environmental cues in eliciting healthy habits when self-control resources are depleted. Participants who had been trained to choose carrots habitually to a pictorial stimulus (i.e., habit cue) subsequently resisted choosing M&Ms as long as the cue was present. This effect of habit cues on healthy food choices suggests the usefulness of manipulating such cues as a means of meeting self-regulatory goals such as portion control. Copyright © 2015 Elsevier Ltd. All rights reserved.

  8. Observations of exoplanets in time-evolving habitable zones of pre-main-sequence M dwarfs

    Science.gov (United States)

    Tian, Feng

    2015-09-01

    It is recently proposed that planets in the habitable zones (HZ) of pre-main-sequence (PMS) M dwarfs are good targets for the detection of habitable environments. In this note we show that future ground-based telescopes will be able to observe planets in time-evolving HZ of PMS M dwarfs with duration 10-100 Myrs. Based on X-ray measurements, there are >18 M0-M4 PMS stars within 10 pc, the characterization of potentially habitable exoplanets around which could provide highly valuable information regarding the evolution of habitable environments. There are tens of M dwarfs within 10 pc with X-ray to total luminosity ratios similar to that of the young Sun, the observations of potential planets around which could significantly improve our understanding of the physical states of early Solar System rocky planets.

  9. Canvasback Food Habits in Chesapeake Bay

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Food habits analyses were conducted on the gullet and gizzards of 153 canvasbacks (Aythya valisineria) collected at night from eight major wintering areas in...

  10. Alaska Steller Sea Lion Food Habits Data

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This data set contains food habits samples, usually scats, collected opportunistically on Steller sea lion rookeries and haulouts in Alaska from 1985 to present....

  11. Setting the Stage for Habitable Planets

    Science.gov (United States)

    Gonzalez, Guillermo

    2014-01-01

    Our understanding of the processes that are relevant to the formation and maintenance of habitable planetary systems is advancing at a rapid pace, both from observation and theory. The present review focuses on recent research that bears on this topic and includes discussions of processes occurring in astrophysical, geophysical and climatic contexts, as well as the temporal evolution of planetary habitability. Special attention is given to recent observations of exoplanets and their host stars and the theories proposed to explain the observed trends. Recent theories about the early evolution of the Solar System and how they relate to its habitability are also summarized. Unresolved issues requiring additional research are pointed out, and a framework is provided for estimating the number of habitable planets in the Universe. PMID:25370028

  12. Weight Loss: Ready to Change Your Habits?

    Science.gov (United States)

    ... the challenge of overhauling your eating and exercise habits. Instead, consider giving your life a chance to calm down before you launch your weight-loss program. Achieving and maintaining a healthy weight is a lifelong process. Start by making ...

  13. Marine Mammal Food Habits Reference Collections

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The National Marine Mammal Laboratory (NMML) Food Habits Reference Collection, containing over 8000 specimens of cephalopod beaks and fish bones and otoliths, is...

  14. Setting the Stage for Habitable Planets

    Directory of Open Access Journals (Sweden)

    Guillermo Gonzalez

    2014-02-01

    Full Text Available Our understanding of the processes that are relevant to the formation and maintenance of habitable planetary systems is advancing at a rapid pace, both from observation and theory. The present review focuses on recent research that bears on this topic and includes discussions of processes occurring in astrophysical, geophysical and climatic contexts, as well as the temporal evolution of planetary habitability. Special attention is given to recent observations of exoplanets and their host stars and the theories proposed to explain the observed trends. Recent theories about the early evolution of the Solar System and how they relate to its habitability are also summarized. Unresolved issues requiring additional research are pointed out, and a framework is provided for estimating the number of habitable planets in the Universe.

  15. [Bad habits and dysgnathia: epidemiological study].

    Science.gov (United States)

    Cordasco, G; Lo Giudice, G; Dolci, E; Romeo, U; Lafronte, G

    1989-01-01

    The authors refer about an epidemiological survey in 651 children in the school-age. The aim of study is to investigate about the frequency of the bad habits and the pathogenetic relations between these and the development of the dento-maxillo-facial deformities. They point out an incidence of these bad habits in the 35,48% with a predominance of mouth breathers (45,45%). After they discuss the necessity of an early detection of anomalous neuromuscular attitudes.

  16. Reading Habits and Attitudes of UMSKAL Undergraduates

    OpenAIRE

    Shameem Ahmed

    2016-01-01

    Effective reading is essential for success in acquiring a foreign language (Mikulecky 2008). Students have to read a wide range of textbooks and related materials at the tertiary level. Lack of adequate reading habit is, therefore, bound to impede students’ progress towards mastery of a foreign language. This study investigated reading habits and attitudes on reading of the undergraduate students attending ESL courses at a public university in Malaysia. For data collection, a 35 item question...

  17. Nutritional habits in Italian university students

    OpenAIRE

    Adele Anna Teleman; Chiara de Waure; Valentina Soffiani; Andrea Poscia; Maria Luisa Di Pietro

    2015-01-01

    INTRODUCTION: Dietary habits have been indicated by research as key elements in both disease pathogenesis and prevention and health promotion. MATERIALS AND METHODS: We analyzed data collected from Italian university students regarding consumption of fruits, vegetables, fast-foods, sweets, energizing drinks, and coffee, average number of eating episodes per day and regularity of breakfast habits. RESULTS: 44% of the university student population eats in average at least 1 portion of fruit per...

  18. Military experience can influence Women's eating habits.

    Science.gov (United States)

    Breland, Jessica Y; Donalson, Rosemary; Nevedal, Andrea; Dinh, Julie V; Maguen, Shira

    2017-11-01

    Disordered eating, ranging from occasional binge eating or restriction to behaviors associated with eating disorder diagnoses, is common among military personnel and veterans. However, there is little information on how military service affects eating habits. To describe possible pathways between military service and disordered eating among women veterans, a high risk group. Twenty women veterans who reported changing eating habits in response to stress participated in audio-recorded focus groups or dyadic interviews between April 2013 and October 2014. We used thematic analysis of transcripts to identify and understand women's self-reported eating habits before, during, and after military service. Participants reported entering the military with varied eating habits, but little disordered eating. Participants described several ways military environments affected eating habits, for example, by promoting fast, irregular, binge-like eating and disrupting the reward value of food. Participants believed military-related stressors, which were often related to gender, also affected eating habits. Such stressors included military sexual trauma and the need to meet military weight requirements in general and after giving birth. Participants also reported that poor eating habits continued after military service, often because they remained under stress. For some women, military service can result in socialization to poor eating habits, which when combined with exposure to stressors can lead to disordered eating. Additional research is needed, including work to understand possible benefits associated with providing support in relation to military weight requirements and the transition out of military service. Given the unique experiences of women in the military, future work could also focus on health services surrounding pregnancy-related weight change and the stress associated with being a woman in predominantly male military environments. Published by Elsevier Ltd.

  19. Habitable worlds with no signs of life.

    Science.gov (United States)

    Cockell, Charles S

    2014-04-28

    'Most habitable worlds in the cosmos will have no remotely detectable signs of life' is proposed as a biological hypothesis to be tested in the study of exoplanets. Habitable planets could be discovered elsewhere in the Universe, yet there are many hypothetical scenarios whereby the search for life on them could yield negative results. Scenarios for habitable worlds with no remotely detectable signatures of life include: planets that are habitable, but have no biosphere (Uninhabited Habitable Worlds); planets with life, but lacking any detectable surface signatures of that life (laboratory examples are provided); and planets with life, where the concentrations of atmospheric gases produced or removed by biota are impossible to disentangle from abiotic processes because of the lack of detailed knowledge of planetary conditions (the 'problem of exoplanet thermodynamic uncertainty'). A rejection of the hypothesis would require that the origin of life usually occurs on habitable planets, that spectrally detectable pigments and/or metabolisms that produce unequivocal biosignature gases (e.g. oxygenic photosynthesis) usually evolve and that the organisms that harbour them usually achieve a sufficient biomass to produce biosignatures detectable to alien astronomers.

  20. Corresponding Habits of Mind and Mathematical Ability

    Science.gov (United States)

    Dwirahayu, G.; Kustiawati, D.; Bidari, I.

    2017-09-01

    Objective of learning process regarding system of Indonesia government should be consist of knowledge, attitudes, and skills, or in general we call cognitive, affective and psychomotor. These objective are apply to mathematics education also. Attitude in mathematics known as habits of mind. The teacher should create a learning objective which including all, cognitive, affective and psychomotor. In general, math teachers in Indonesia pay attention to aspects of knowledge, and they ignore other aspects. Habits of mind is term which means the tendency to behave intellectually or intelligently when faced with problems which is immediately known solution. This article examines the math teacher’s attention to students’ habits of mind. The research done by survey method to 38 students at Islamic School 32 Jakarta academic year 2015/2016 from April to May 2016. Habits of mind are observed in this research restricted to persisting, thinking about thinking, thinking flexible and applying past knowledge to new situation. Based on survey, conclude that teacher, without realizing, they have to improve students’ habits of mind, as long as teaching and learning only persisting and thinking about thinking are already well developed, while flexible thinking and applying past knowledge to new situation has not well developed. We hope, math teacher can pay attention not only cognitive aspect but habits of mind also.

  1. Investigating habits: strategies, technologies and models

    Science.gov (United States)

    Smith, Kyle S.; Graybiel, Ann M.

    2014-01-01

    Understanding habits at a biological level requires a combination of behavioral observations and measures of ongoing neural activity. Theoretical frameworks as well as definitions of habitual behaviors emerging from classic behavioral research have been enriched by new approaches taking account of the identification of brain regions and circuits related to habitual behavior. Together, this combination of experimental and theoretical work has provided key insights into how brain circuits underlying action-learning and action-selection are organized, and how a balance between behavioral flexibility and fixity is achieved. New methods to monitor and manipulate neural activity in real time are allowing us to have a first look “under the hood” of a habit as it is formed and expressed. Here we discuss ideas emerging from such approaches. We pay special attention to the unexpected findings that have arisen from our own experiments suggesting that habitual behaviors likely require the simultaneous activity of multiple distinct components, or operators, seen as responsible for the contrasting dynamics of neural activity in both cortico-limbic and sensorimotor circuits recorded concurrently during different stages of habit learning. The neural dynamics identified thus far do not fully meet expectations derived from traditional models of the structure of habits, and the behavioral measures of habits that we have made also are not fully aligned with these models. We explore these new clues as opportunities to refine an understanding of habits. PMID:24574988

  2. The power of habits: unhealthy snacking behaviour is primarily predicted by habit strength.

    Science.gov (United States)

    Verhoeven, Aukje A C; Adriaanse, Marieke A; Evers, Catharine; de Ridder, Denise T D

    2012-11-01

    Although increasing evidence shows the importance of habits in explaining health behaviour, many studies still rely solely on predictors that emphasize the role of conscious intentions. The present study was designed to test the importance of habit strength in explaining unhealthy snacking behaviour in a large representative community sample (N= 1,103). To test our hypothesis that habits are crucial when explaining unhealthy snacking behaviour, their role was compared to the 'Power of Food', a related construct that addresses sensitivity to food cues in the environment. Moreover, the relation between Power of Food and unhealthy snacking habits was assessed. A prospective design was used to determine the impact of habits in relation to intention, Power of Food and a number of demographic variables. One month after filling out the questionnaire, including measures of habit strength and Power of Food, participants reported their unhealthy snacking behaviour by means of a 7-day snack diary. Results showed that habit strength was the most important predictor, outperforming all other variables in explaining unhealthy snack intake. The findings demonstrate that snacking habits provide a unique contribution in explaining unhealthy snacking behaviour, stressing the importance of addressing habit strength in further research and interventions concerning unhealthy snacking behaviour. ©2012 The British Psychological Society.

  3. Putting habit into practice, and practice into habit: a process evaluation and exploration of the acceptability of a habit-based dietary behaviour change intervention.

    Science.gov (United States)

    Gardner, Benjamin; Sheals, Kate; Wardle, Jane; McGowan, Laura

    2014-10-30

    Forming 'habit' - defined as a learned process that generates automatic responses to contextual cues - has been suggested as a mechanism for behaviour maintenance, but few studies have applied habit theory to behaviour change. This study used process evaluation data, taken from a randomised controlled trial of a healthy child-feeding intervention for parents previously shown to be effective, to explore the applicability to dietary behaviour change of predictions and recommendations drawn from habit theory. The intervention supported parents in pursuing child-feeding habit goals in three domains (giving fruit and vegetables, water, healthy snacks), over four fortnightly home visits. We explored whether (a) the habit-formation model was acceptable to participants, (b) better-specified habit-formation goals yielded greater habit gains, and (c) habit gains were sustained (d) even when subsequent, new habit goals were pursued. Qualitative and quantitative data were taken from 57 parents randomised to the intervention arm, and so analyses presented here used a pre-post intervention design. Thematic analysis of post-intervention qualitative interviews evaluated acceptability, and self-reported habit goals were content-analysed. ANOVAs explored changes in habit strength, recorded at home visits and one- and two-month follow-ups, across time and goals. Participants understood and engaged positively with the habit-formation approach. Although many seemingly poorly-specified habit goals were set, goal characteristics had minimal impact on habit strength, which were achieved within two weeks for all behaviours (p's change.

  4. Make the High School Library a "Habit" for Students

    Science.gov (United States)

    Bowling, Barbara L.

    2012-01-01

    How long does it take to form a habit? Recent research done at the University College London by Phillippa Lally and colleagues suggest it takes an average of sixty-six days to form a new habit. Other research indicates that rewards make habits easier to form, but it takes repetition to form a habit. A literature review conducted for Pearson…

  5. Domain morphology controlled crystal habits in PbTiO{sub 3} nanocrystals

    Energy Technology Data Exchange (ETDEWEB)

    Dudhe, C.M., E-mail: chandraguptadudhe@gmail.com; Khambadkar, S.J.

    2015-11-05

    Various crystal habits and associated domain structures in PbTiO{sub 3} nanocrystals synthesized by a modified sol–gel method have been studied. Structural and morphological characterizations of synthesized nanoparticles have been done by X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was found from the -z coordinates of O{sub 1} and O{sub 2} that the Ti–O{sub 6} octahedra were distorted slightly, favorable for the ferroelectric nature. TEM images show butterfly like, plate like, irregular sphere like and oval-shaped habits of the nanocrystals. 90° and 180° domain structures in these crystal habits were explored from their morphologies and appearance in the field of views. The mutual association between the crystal habit and the direction spontaneous polarization P{sub s} due to domain structures was explored. Domain wall energies of 90° and 180° domains were also estimated from the kinetic process of domain nucleation. - Highlights: • Various crystal habits of PbTiO{sub 3} nanoparticles were examined by TEM. • 90° and 180° domains were explored in the nanocrystal. • Crystal habits and domain structures were correlated. • Domain wall energies were estimated.

  6. [Self-efficacy and self management of healthy habits in fibromyalgia].

    Science.gov (United States)

    Pérez-Velasco, María; Peñacoba-Puente, Cecilia

    2015-01-01

    Fibromyalgia is a disorder characterized by general chronic pain, together with other symptoms such as fatigue, sleep disorders, anxiety and depression. To analyze, in FM patients, the effects of a multi-component intervention program (nursing+cognitive-behavioural therapy, focused on improving resting habits, physical exercise, and family relationships, working simultaneously on empowerment and patient self-efficacy. A quasi-experimental design was used following-up 5 women diagnosed with fibromyalgia. An analysis was performed on their daily habits, self-efficacy for chronic pain, pain perception, functional limitation, and affect. The intervention was composed by 8 group sessions: Six of them aimed at health education and self-management of healthy habits (nursing), and two sessions dedicated to increasing self-efficacy (cognitive-behavioural therapy). Follow-up consisted of five individual sessions (nursing) so as to consolidate the newly acquired habits, maintain self-management and self-efficacy based on observing compliance. Statistically significant improvements were observed (pre-, pos-) in habit modification and in self-efficacy, as well as for positive and negative affect. Also, statistically significant differences were found pre-follow up for functional limitation. The role of nursing has to be considered within multi-component programs, in particular during follow-up, for changing habits and for self-efficacy, in response to some of the current limitations of interventions with these patients. Copyright © 2015 Elsevier España, S.L.U. All rights reserved.

  7. The power of habits : Unhealthy snacking behaviour is primarily predicted by habit strength

    NARCIS (Netherlands)

    Verhoeven, A.A.C.; Adriaanse, M.A.; Evers, C.; de Ridder, D.T.D.

    2012-01-01

    Objective. Although increasing evidence shows the importance of habits in explaining health behaviour, many studies still rely solely on predictors that emphasize the role of conscious intentions. The present study was designed to test the importance of habit strength in explaining unhealthy

  8. The Pale Orange Dot: The Spectrum and Habitability of Hazy Archean Earth.

    Science.gov (United States)

    Arney, Giada; Domagal-Goldman, Shawn D; Meadows, Victoria S; Wolf, Eric T; Schwieterman, Edward; Charnay, Benjamin; Claire, Mark; Hébrard, Eric; Trainer, Melissa G

    2016-11-01

    Recognizing whether a planet can support life is a primary goal of future exoplanet spectral characterization missions, but past research on habitability assessment has largely ignored the vastly different conditions that have existed in our planet's long habitable history. This study presents simulations of a habitable yet dramatically different phase of Earth's history, when the atmosphere contained a Titan-like, organic-rich haze. Prior work has claimed a haze-rich Archean Earth (3.8-2.5 billion years ago) would be frozen due to the haze's cooling effects. However, no previous studies have self-consistently taken into account climate, photochemistry, and fractal hazes. Here, we demonstrate using coupled climate-photochemical-microphysical simulations that hazes can cool the planet's surface by about 20 K, but habitable conditions with liquid surface water could be maintained with a relatively thick haze layer (τ ∼ 5 at 200 nm) even with the fainter young Sun. We find that optically thicker hazes are self-limiting due to their self-shielding properties, preventing catastrophic cooling of the planet. Hazes may even enhance planetary habitability through UV shielding, reducing surface UV flux by about 97% compared to a haze-free planet and potentially allowing survival of land-based organisms 2.7-2.6 billion years ago. The broad UV absorption signature produced by this haze may be visible across interstellar distances, allowing characterization of similar hazy exoplanets. The haze in Archean Earth's atmosphere was strongly dependent on biologically produced methane, and we propose that hydrocarbon haze may be a novel type of spectral biosignature on planets with substantial levels of CO2. Hazy Archean Earth is the most alien world for which we have geochemical constraints on environmental conditions, providing a useful analogue for similar habitable, anoxic exoplanets. Key Words: Haze-Archean Earth-Exoplanets-Spectra-Biosignatures-Planetary habitability

  9. [Eating habits of patients with severe obesity].

    Science.gov (United States)

    Reséndiz Barragán, Aída Monserrat; Hernández Altamirano, Sheila Viridiana; Sierra Murguía, Mariana Alejandra; Torres Tamayo, Margarita

    2014-11-30

    Severe obesity is a health problem that has medical, emotional and economic consequences. The etiology of severe obesity is multifactorial; however, it is known that the eating habits represent a major factor in the development of this disease. This study aimed to identify eating patterns and specific habits that need to be changed to achieve weight loss. An observational, descriptive, retrospective and cross-sectional study with 250 candidates for bariatric surgery, 79.2% women and 20.8% men aged 37.7 ± 10.2 years and 44.3 ± 7.7 kg/m2 BMI patients was performed. It was found that "drinking water", "eat faster than most people", "leave the plate empty", "have long fasts", "sweet cravings", and "drinking soda" were the most common habits in patients with severe obesity. The existence of significant differences between the habits of men and women and between BMI strata or groups are also discussed. "Snacking" and "eat until you feel uncomfortable" were significantly different between men and women and "eat by yourself because you feel ashamed of eating with others" was significant between BMI strata. It was concluded that it is important that the treatment of these patients includes assessment techniques and behavior modification aimed at these habits. It is recommended to include in future studies patients with normal weight and overweight as well as the use of instruments with adequate psychometric properties. Copyright AULA MEDICA EDICIONES 2014. Published by AULA MEDICA. All rights reserved.

  10. General Habit Propensity Relates to the Sensation Seeking Subdomain of Impulsivity But Not Obesity

    NARCIS (Netherlands)

    Dietrich, A.; de Wit, S.; Horstmann, A.

    2016-01-01

    According to dual-system theory, instrumental learning and performance depend on the balance between goal-directed and habitual action control. Overreliance on habits has been argued to characterize clinical conditions such as drug addiction or obsessive-compulsive disorder as well as obesity and

  11. Geophysical and atmospheric evolution of habitable planets.

    Science.gov (United States)

    Lammer, Helmut; Selsis, Frank; Chassefière, Eric; Breuer, Doris; Griessmeier, Jean-Mathias; Kulikov, Yuri N; Erkaev, Nikolai V; Khodachenko, Maxim L; Biernat, Helfried K; Leblanc, Francois; Kallio, Esa; Lundin, Richard; Westall, Frances; Bauer, Siegfried J; Beichman, Charles; Danchi, William; Eiroa, Carlos; Fridlund, Malcolm; Gröller, Hannes; Hanslmeier, Arnold; Hausleitner, Walter; Henning, Thomas; Herbst, Tom; Kaltenegger, Lisa; Léger, Alain; Leitzinger, Martin; Lichtenegger, Herbert I M; Liseau, René; Lunine, Jonathan; Motschmann, Uwe; Odert, Petra; Paresce, Francesco; Parnell, John; Penny, Alan; Quirrenbach, Andreas; Rauer, Heike; Röttgering, Huub; Schneider, Jean; Spohn, Tilman; Stadelmann, Anja; Stangl, Günter; Stam, Daphne; Tinetti, Giovanna; White, Glenn J

    2010-01-01

    The evolution of Earth-like habitable planets is a complex process that depends on the geodynamical and geophysical environments. In particular, it is necessary that plate tectonics remain active over billions of years. These geophysically active environments are strongly coupled to a planet's host star parameters, such as mass, luminosity and activity, orbit location of the habitable zone, and the planet's initial water inventory. Depending on the host star's radiation and particle flux evolution, the composition in the thermosphere, and the availability of an active magnetic dynamo, the atmospheres of Earth-like planets within their habitable zones are differently affected due to thermal and nonthermal escape processes. For some planets, strong atmospheric escape could even effect the stability of the atmosphere.

  12. Rainbows, polarization, and the search for habitable planets.

    Science.gov (United States)

    Bailey, Jeremy

    2007-04-01

    Current proposals for the characterization of extrasolar terrestrial planets rest primarily on the use of spectroscopic techniques. While spectroscopy is effective in detecting the gaseous components of a planet's atmosphere, it provides no way of detecting the presence of liquid water, the defining characteristic of a habitable planet. In this paper, I investigate the potential of an alternative technique for characterizing the atmosphere of a planet using polarization. By looking for a polarization peak at the "primary rainbow" scattering angle, it is possible to detect the presence of liquid droplets in a planet's atmosphere and constrain the nature of the liquid through its refractive index. Single scattering calculations are presented to show that a well-defined rainbow scattering peak is present over the full range of likely cloud droplet sizes and clearly distinguishes the presence of liquid droplets from solid particles such as ice or dust. Rainbow scattering has been used in the past to determine the nature of the cloud droplets in the Venus atmosphere and by the POLarization and Directionality of Earth Reflectances (POLDER) instrument to distinguish between liquid and ice clouds in the Earth atmosphere. While the presence of liquid water clouds does not guarantee the presence of water at the surface, this technique could complement spectroscopic techniques for characterizing the atmospheres of potential habitable planets. The disk-integrated rainbow peak for Earth is estimated to be at a degree of polarization of 12.7% or 15.5% for two different cloud cover scenarios. The observation of this rainbow peak is shown to be feasible with the proposed Terrestrial Planet Finder Coronograph mission in similar total integration times to those required for spectroscopic characterization.

  13. The Five Habits of the Master Thinker

    Directory of Open Access Journals (Sweden)

    Randolph H. Pherson

    2013-08-01

    Full Text Available Often analysts will observe that they do not have enough time to use Structured Analytic Techniques. When presented with this challenge by analysts in the UK Cabinet Office, the author came up with the following response: Develop these five habits when you have time so that when time is short you have developed a capacity to use them instinctively. This article describes the Five Habits of the Master Thinker in detail, reviews how they were selected, and explores how they can most easily be inculcated into how an analyst processes information.

  14. Adolescents' unhealthy eating habits are associated with meal skipping.

    Science.gov (United States)

    Rodrigues, Paulo Rogério Melo; Luiz, Ronir Raggio; Monteiro, Luana Silva; Ferreira, Márcia Gonçalves; Gonçalves-Silva, Regina Maria Veras; Pereira, Rosangela Alves

    2017-10-01

    Meal consumption and diet quality are important for healthy development during adolescence. The aim of this study was to determine the association between meal habits and diet quality in Brazilian adolescents. A school-based, cross-sectional study was conducted in 2008 with a probabilistic sample of adolescents ages 14 to 19 y (N = 1139) from high schools in central-western Brazil. Consumption of breakfast, morning snack, lunch, afternoon snack, and dinner was assessed to evaluate adolescents' meal profile. The Brazilian Healthy Eating Index-Revised (BHEI-R) was calculated to evaluate diet quality. The association between meal profile and BHEI-R (global estimates and components) was assessed using multivariate linear regression models. Diet was characterized by unhealthy eating: a low consumption of fruits, vegetables, and milk/dairy, and a high consumption of fats and sodium. An unsatisfactory meal profile was observed in 14% of adolescents, whereas daily consumption of breakfast, lunch, and dinner was reported by 47%, 78%, and 52% of adolescents, respectively. Meal profile was positively associated with diet quality. Daily consumption of breakfast was associated with higher BHEI-R scores, lower sodium intake, and greater consumption of fruits and milk/dairy. Daily consumption of lunch was associated with greater consumption of vegetables and "meats, eggs, and legumes," whereas consumption of dinner was associated with an increased consumption of "whole fruits." This study showed a parallelism between daily consumption of meals with healthier eating and greater adherence to traditional Brazilian food habits. Skipping meals was associated with a low-quality diet, especially concerning to the low consumption of fruits and vegetables and a high intake of sodium and calories from solid fats, added sugars, and alcoholic beverages. Therefore, the adoption of regular meal habits may help adolescents improve their diet quality. Copyright © 2017 Elsevier Inc. All

  15. The effect of multiple heat sources on exomoon habitable zones

    Science.gov (United States)

    Dobos, Vera; Heller, René; Turner, Edwin L.

    2017-05-01

    With dozens of Jovian and super-Jovian exoplanets known to orbit their host stars in or near the stellar habitable zones, it has recently been suggested that moons the size of Mars could offer abundant surface habitats beyond the solar system. Several searches for such exomoons are now underway, and the exquisite astronomical data quality of upcoming space missions and ground-based extremely large telescopes could make the detection and characterization of exomoons possible in the near future. Here we explore the effects of tidal heating on the potential of Mars- to Earth-sized satellites to host liquid surface water, and we compare the tidal heating rates predicted by tidal equilibrium model and a viscoelastic model. In addition to tidal heating, we consider stellar radiation, planetary illumination and thermal heat from the planet. However, the effects of a possible moon atmosphere are neglected. We map the circumplanetary habitable zone for different stellar distances in specific star-planet-satellite configurations, and determine those regions where tidal heating dominates over stellar radiation. We find that the "thermostat effect" of the viscoelastic model is significant not just at large distances from the star, but also in the stellar habitable zone, where stellar radiation is prevalent. We also find that tidal heating of Mars-sized moons with eccentricities between 0.001 and 0.01 is the dominant energy source beyond 3-5 AU from a Sun-like star and beyond 0.4-0.6 AU from an M3 dwarf star. The latter would be easier to detect (if they exist), but their orbital stability might be under jeopardy due to the gravitational perturbations from the star.

  16. Reading Habit Promotion in ASEAN Libraries.

    Science.gov (United States)

    Sangkaeo, Somsong

    This paper describes the activities of the Association of Southeast Asian Nations (ASEAN) libraries have undertaken to promote reading by increasing awareness among their people. First, factors limiting reading habits in ASEAN libraries are addressed, including: we are not a reading society, but a chatting society; the management of "3…

  17. Dietary Habits of Greek Primary School Children

    Science.gov (United States)

    Piperakis, S. M.; Papadimitriou, V.; Zafiropoulou, M.; Piperakis, A. S.; Zisis, P.

    2007-01-01

    The purpose of this study was to assess Greek primary (1st to 6th grade) school children's dietary habits and the factors influencing them. Our results show that children know the value of different foods. The socio-economic status of father has no effect on the attitude of children towards choosing their diet, however, mothers' educational status…

  18. [Food habits and cigarette smoking in adolescents].

    Science.gov (United States)

    Bruppacher, R; Erne, H

    1975-01-01

    Bad eating habits, e.g. no regular breakfast, rarer consumption of fruits and milk, are associated with higher frequency of cigarette smoking in adolescence. Probably this is due to a common factor most likely to be found in the personality of the adolescent and its determinants.

  19. [Smoking habits in a family physician's practice].

    Science.gov (United States)

    Maciejewski, Janusz; Bednarek, Michał; Korzybski, Damian; Zieliński, Jan

    2009-01-01

    Poland is the one of the countries in the European Union with the highest prevalence of smokers. The involvement of family physicians in smoking cessation activity could improve this situation. The aim of this study was to estimate smoking habits, their intensity and nicotine dependence in a family physician's practice (urban and rural population). An additional aim was to estimate smoking habits in relation to the presence of smoking-related disease, gender, location and motivation to stop smoking. This study was part of an investigation into the prevalence and severity of chronic obstructive pulmonary disease (COPD) in the same population. Statistical analysis of questionnaires about smoking and history of respiratory diseases, Fagerström's nicotine dependence test and a motivation to quit test were performed. Questionnaires were filled in by 1960 subjects (87% of those eligible). There were 29.6% current smokers, 24.9% ex-smokers, and 45.5% never-smokers. There were 39.4% current smokers among men, and 23.3% among women. Current smokers were more numerous in the rural population. 54% of women urban dwellers and 73% of women from rural population never smoked. There were no significant differences in the motivation to stop smoking or in the nicotine dependence among smokers with and without COPD nor according to the severity of COPD. Smoking habits among the studied population were comparable with national and regional data. The intensity of smoking habits among female town dwellers is especially alarming.

  20. Curbing promiscuous habits among Nigerians through religious ...

    African Journals Online (AJOL)

    The act of prostitution, adultery and premarital sex has existed since time immemorial and the general public considers it a deviant act which is the act of being different from the popular belief, usually in a bad way. The aim of this study is to discourage inappropriate sexual habit through religious instructions and encourage ...

  1. Reading Habits and Attitudes of UMSKAL Undergraduates

    Directory of Open Access Journals (Sweden)

    Shameem Ahmed

    2016-03-01

    Full Text Available Effective reading is essential for success in acquiring a foreign language (Mikulecky 2008. Students have to read a wide range of textbooks and related materials at the tertiary level. Lack of adequate reading habit is, therefore, bound to impede students’ progress towards mastery of a foreign language. This study investigated reading habits and attitudes on reading of the undergraduate students attending ESL courses at a public university in Malaysia. For data collection, a 35 item questionnaire based on the Adult Survey of Reading Attitude (ASRA from the work of Smith (1991 were designed and administered on around 314 students. The questionnaire investigated the students’ general habit, preferences, and attitude towards reading. This study was based on the following research questions: What are the reading habits of these undergraduate students? What are the attitudes of these students to reading as a useful language learning skill? What are the reading preferences of these undergraduate students? The research findings through qualitative analysis revealed that the undergraduate students had an overall positive attitude towards reading in spite of their minimal enjoyment of it and the resulting anxieties and difficulties they face. Based on the findings, few recommendations were made to improve reading among those undergraduates.

  2. BREAKFAST EATING HABITS AMONG MEDICAL STUDENTS

    African Journals Online (AJOL)

    2014-06-01

    Jun 1, 2014 ... among medical students and its effect on their attention span and level of fatigue during clinical sessions. Design: A descriptive cross-sectional study of break- fast eating habits among medical students at the Uni- versity of Ghana Medical School, Korle Bu-Accra. Setting: The University of Ghana Medical ...

  3. Pedagogical Practices: Nurturing and Maintaining Democratic Habits

    Science.gov (United States)

    Hubler-Larimore, Lucretia Marie

    2011-01-01

    This case study examined the pedagogical practices of four teachers of one public elementary school whose mission seeks to nurture and maintain democratic habits for participation in a democratic society. Historically, public schools have been charged with the duty of preparing young minds to live within in a democratic society and as such this…

  4. Planetary science: Bypassing the habitable zone

    Science.gov (United States)

    Ingersoll, Andrew P.

    2017-08-01

    In our own solar system, Venus is too hot, Mars is too cold and Earth is just right. Simulations show that making an icy planet habitable is not as simple as melting its ice: many icy bodies swing from too cold to too hot, bypassing just right.

  5. [Eating habits in physical therapy students].

    Science.gov (United States)

    Bayona-Marzo, I; Navas-Cámara, F J; Fernández de Santiago, F J; Mingo-Gómez, T; de la Fuente-Sanz, Ma A; Cacho del Amo, A

    2007-01-01

    a) To know the eating and exercising habits of undergraduate Physical Therapy students; b) To promote awareness among these future health professionals and educators of the need to foster adequate eating habits among patients and the general population. A dietary and physical activity questionnaire, regarding a seven-day period, distributed among students of the School of Physical Therapy (University of Valladolid) in the city of Soria, Spain (n = 131; sex (m/f): 38/93). Results show that a high percentage of the subjects follow the recommendations of the new Nutritional Pyramid of the Spanish Nutrition Society (SEN) regarding intake of meat, fish, milk, dairy products and exercise habits. This is not the case, however, for products such as pasta, bread and cereals, vegetables, fruits, legumes and olive oil. Furthermore, fast food is taken, on average, once a week despite the recommended sporadic monthly intakes. According to results, formative programmes should be carried out to enable these students to encourage healthy diets. Thus, diseases related to non-healthy eating habits could be prevented, and information on the issue could be spread among the population.

  6. Nutritional habits in Italian university students.

    Science.gov (United States)

    Teleman, Adele Anna; de Waure, Chiara; Soffiani, Valentina; Poscia, Andrea; Di Pietro, Maria Luisa

    2015-01-01

    Dietary habits have been indicated by research as key elements in both disease pathogenesis and prevention and health promotion. We analyzed data collected from Italian university students regarding consumption of fruits, vegetables, fast-foods, sweets, energizing drinks, and coffee, average number of eating episodes per day and regularity of breakfast habits. 44% of the university student population eats in average at least 1 portion of fruit per day. 22.5% eats at least 2 portions of vegetables per day. 8.5% eats in average 5 times per day with 48.6% declaring an average of 3 eating episodes per day. 11.3% consumes eccessive amounts of caffeine. 49.1% of the females reaches the recommended consumption of fruit, compared to only 33.8% of males (p eats at least 2 portions of vegetables per day, compared to 12.0% of males (p eating habits of young adults do not follow national recommendations. Less than 50% of university students eats at least 1 portion of fruit per day and less than 1 out of 4 eats at least 2 portions of vegetables per day. Less than 10% of the students eats in average 5 times per day and more than 1 out of 3 does not have breakfast regularly every morning. Interventions targeting university students are required in order to increase their knowledge on healthy eating habits and to ameliorate their dietary behaviours.

  7. Essays on habit formation and inflation hedging

    NARCIS (Netherlands)

    Zhou, Y.

    2014-01-01

    The thesis consists of four chapters. Chapter 1 reviews recent contributions on habit formation in the literature and investigates its implications for investors. Chapter 2 revisits the “Floor-Leverage” rule for investors with ratchet consumption preference proposed by Scott and Watson (2011). It

  8. Assessment of physical and mental health in male university students with varying sleep habits.

    Science.gov (United States)

    Matsumoto, Yuuki; Toyomasu, Kouji; Uchimura, Naohisa

    2011-01-01

    Healthy sleep habits entail not only sleeping for a sufficient period (quantity) but also regularity of the sleep cycle and getting sound sleep (quality). University students often have erratic schedules that cause irregular sleep patterns even though sleep durations remain relatively constant. This study compared the physical and mental health of 90 male university students with different sleep habits. We created sleep habit scales using the Tokyo Metropolitan Institute for Neuroscience life habits inventory (TMIN-LHI; Miyashita, 1994) by performing a factor analysis and classifying sleeping habits based on regularity, quality, and quantity. Four types of sleep habits were identified by cluster analysis; good sleep was characterized by regular and high quality sleep but of relatively short sleep duration; long sleep was regular and relatively long but of low quality; short sleep was of high quality but short and irregular, while poor sleep was irregular, of low quality, and relatively long. The good sleep group had a significantly lower average waist circumference, and lower systolic and diastolic blood pressure. The long and poor sleep groups, which both had low quality sleep, scored lower than the national standard on the mental component summary (MCS) calculated from the Social Functioning-36 (SF-36) short-form health survey. Furthermore, the average MCS score of the poor sleep group was significantly lower than that of any other sleep habit group. Subjects with poor sleep also scored lowest on the Self-rating Depression Scale (SDS). In addition, the short and poor sleep groups were prone to glucose or lipid metabolism disorders. Maintaining good physical and mental health without sound sleep and a regular sleep cycle is difficult, even if sleeping hours are kept constant. Therefore, we included the assessment of regularity and quality in addition to hours of sleep in order to develop appropriate sleep guidelines for improved physical and mental health.

  9. Habitable zone limits for dry planets.

    Science.gov (United States)

    Abe, Yutaka; Abe-Ouchi, Ayako; Sleep, Norman H; Zahnle, Kevin J

    2011-06-01

    Most discussion of habitable planets has focused on Earth-like planets with globally abundant liquid water. For an "aqua planet" like Earth, the surface freezes if far from its sun, and the water vapor greenhouse effect runs away if too close. Here we show that "land planets" (desert worlds with limited surface water) have wider habitable zones than aqua planets. For planets at the inner edge of the habitable zone, a land planet has two advantages over an aqua planet: (i) the tropics can emit longwave radiation at rates above the traditional runaway limit because the air is unsaturated and (ii) the dry air creates a dry stratosphere that limits hydrogen escape. At the outer limits of the habitable zone, the land planet better resists global freezing because there is less water for clouds, snow, and ice. Here we describe a series of numerical experiments using a simple three-dimensional global climate model for Earth-sized planets. Other things (CO(2), rotation rate, surface pressure) unchanged, we found that liquid water remains stable at the poles of a low-obliquity land planet until net insolation exceeds 415 W/m(2) (170% that of modern Earth), compared to 330 W/m(2) (135%) for the aqua planet. At the outer limits, we found that a low-obliquity land planet freezes at 77%, while the aqua planet freezes at 90%. High-obliquity land and aqua planets freeze at 58% and 72%, respectively, with the poles offering the last refuge. We show that it is possible that, as the Sun brightens, an aqua planet like Earth can lose most of its hydrogen and become a land planet without first passing through a sterilizing runaway greenhouse. It is possible that Venus was a habitable land planet as recently as 1 billion years ago.

  10. Early feeding: setting the stage for healthy eating habits.

    Science.gov (United States)

    Mennella, Julie A; Ventura, Alison K

    2011-01-01

    Food habits, an integral part of all cultures, have their beginnings during early life. This chapter reviews the development of the senses of taste and smell, which provide information on the flavor of foods, and discusses how children's innate predispositions interact with early-life feeding experiences to form dietary preferences and habits. Young children show heightened preferences for foods that taste sweet and salty and rejection of that which tastes bitter. These innate responses are salient during development since they likely evolved to encourage children to ingest that which is beneficial, containing needed calories or minerals, and to reject that which is harmful. Early childhood is also characterized by plasticity, partially evidenced by a sensitive period during early life when infants exhibit heightened acceptance of the flavors experienced in amniotic fluid and breast milk. While learning also occurs with flavors found in formulae, it is likely that this sensitive period formed to facilitate acceptance of and attraction to the flavors of foods eaten by the mother. A basic understanding of the development and functioning of the chemical senses during early childhood may assist in forming evidence-based strategies to improve children's diets. Copyright © 2011 S. Karger AG, Basel.

  11. Human Factors and Habitability Challenges for Mars Missions

    Science.gov (United States)

    Whitmore, Mihriban

    2015-01-01

    As NASA is planning to send humans deeper into space than ever before, adequate crew health and performance will be critical for mission success. Within the NASA Human Research Program (HRP), the Space Human Factors and Habitability (SHFH) team is responsible for characterizing the risks associated with human capabilities and limitations with respect to long-duration spaceflight, and for providing mitigations (e.g., guidelines, technologies, and tools) to promote safe, reliable and productive missions. SHFH research includes three domains: Advanced Environmental Health (AEH), Advanced Food Technology (AFT), and Space Human Factors Engineering (SHFE). The AEH portfolio focuses on understanding the risk of microbial contamination of the spacecraft and on the development of standards for exposure to potential toxins such as chemicals, bacteria, fungus, and lunar/Martian dust. The two risks that the environmental health project focuses on are adverse health effects due to changes in host-microbe interactions, and risks associated with exposure to dust in planetary surface habitats. This portfolio also proposes countermeasures to these risks by making recommendations that relate to requirements for environmental quality, foods, and crew health on spacecraft and space missions. The AFT portfolio focuses on reducing the mass, volume, and waste of the entire integrated food system to be used in exploration missions, and investigating processing methods to extend the shelf life of food items up to five years, while assuring that exploration crews will have nutritious and palatable foods. The portfolio also delivers improvements in both the food itself and the technologies for storing and preparing it. SHFE sponsors research to establish human factors and habitability standards and guidelines in five risk areas, and provides improved design concepts for advanced crew interfaces and habitability systems. These risk areas include: Incompatible vehicle/habitat design

  12. [Selected eating habits and caries occurrence in adolescents].

    Science.gov (United States)

    Krzywiec, Ewa; Zalewska, Magdalena; Wójcicka, Anna; Jabłoński, Robert; Olejnik, Beata Janina; Grabowska, Stanisława Zyta; Jamiołkowski, Jacek; Czerech, Ewa; Łuszcz, Anna; Stepek, Agata; Maciorkowska, Elibieta

    2012-01-01

    Normal nutrition is an important element of caries prophylaxis. The aim of the study was to evaluate the influence of chosen bad eating habits on caries occurrence in adolescents. The examination was carried out in the group of 367 (68.5% girls and 31.5% boys) pupils of the 3rd year of high schools in Białystok in 2011. Own questionnaire was used for the evaluation of eating habits. Caries intensity (PUW) was assessed by dental examination. To verify statistic hypotheses, the level of significance was estimated at p eat breakfast and 62.9%--did not have elevenses. Eating between meals was stated in 96.7% of pupils. Sweets consumption was revealed as follows: 16.8% several times a day, 19%--once a day, 40.5%--several times a week, 18.5%--several times a month, 5.2%--rarely or never. "Fast food" was not consumed by 34% of examined pupils while 54.6% consumed such meals several times a month, 10.9%--several times a week, and 0.5%--once a day. Higher level of caries intensity was observed in girls (mean coefficient PUW = 11.3) than in boys (mean coefficient PUW = 10.8). Mean coefficient PUW = 11.5 concerned pupils with consumption of fast food several times a month while PUW = 11.0 in those who consumed it several times a week, and PUW = 10.7 in pupils who eat rarely or never such food. As far as eating sweets, PUW was higher than mean (12.4) in pupils who eat sweets several times a day. Persons who eat between meals were characterized by higher coefficient (PUW = 13.0) as compared to those who eat between meals rarely (PUW = 11.3) and those who do not eat between meals (PUW = 8.9). (1) Bad eating habits (irregular meals, skipping breakfast, eating between meals as well as overeating sweets) in the developmental age can be a significant caries coefficient in adolescents. 2. High mean coefficient PUW in the examined group of 18-year-old pupils, in relation to abnormal eating habits in the significant percentage of those pupils, indicates the necessity of health

  13. Can't control yourself? Monitor those bad habits.

    Science.gov (United States)

    Quinn, Jeffrey M; Pascoe, Anthony; Wood, Wendy; Neal, David T

    2010-04-01

    What strategies can people use to control unwanted habits? Past work has focused on controlling other kinds of automatic impulses, especially temptations. The nature of habit cuing calls for certain self-control strategies. Because the slow-to-change memory trace of habits is not amenable to change or reinterpretation, successful habit control involves inhibiting the unwanted response when activated in memory. In support, two episode-sampling diary studies demonstrated that bad habits, unlike responses to temptations, were controlled most effectively through spontaneous use of vigilant monitoring (thinking "don't do it," watching carefully for slipups). No other strategy was useful in controlling strong habits, despite that stimulus control was effective at inhibiting responses to temptations. A subsequent experiment showed that vigilant monitoring aids habit control, not by changing the strength of the habit memory trace but by heightening inhibitory, cognitive control processes. The implications of these findings for behavior change interventions are discussed.

  14. Preventing the Flu: Good Health Habits Can Help Stop Germs

    Science.gov (United States)

    ... Avian Swine/Variant Pandemic Other Preventing the Flu: Good Health Habits Can Help Stop Germs Language: English (US) ... her eyes, nose, or mouth. 6. Practice other good health habits. Clean and disinfect frequently touched surfaces at ...

  15. Factors That Were Found to Influence Ghanaian Adolescents’ Eating Habits

    Directory of Open Access Journals (Sweden)

    Patricia Mawusi Amos

    2012-12-01

    Full Text Available The study sought to find out whether factors such as parental, peer, and media influences predict Ghanaian adolescent students’ eating habits. A random selection of 150 students from a population of senior high school students in Ghana were asked to complete the Eating Habits Questionnaire for Adolescents. Data were analyzed by the use of bivariate correlation, t test, and multiple regression analytical techniques using SPSS version 16. The findings revealed a significant positive relationship between peer influence and eating habits suggesting that the higher the peer pressure, the more unhealthy the students’ eating habits. Counterintuitively, parental and media influences did not significantly correlate with students’ eating habits. Gender difference in eating habits suggested that girls had more unhealthy eating habits than boys. Finally, multiple regression analysis revealed that peer influence was a better predictor of students’ eating habits than parental and media influences. The findings were discussed and recommendations were given in light of the study’s limitations.

  16. Healthy Habits for TV, Video Games, and the Internet

    Science.gov (United States)

    ... Healthy Habits for TV, Video Games, and the Internet KidsHealth / For Parents / Healthy Habits for TV, Video ... negative effects that violent video games can have. Internet Safety Become computer literate. Learn how to block ...

  17. Absence from school related to children's and parental smoking habits

    National Research Council Canada - National Science Library

    Charlton, A; Blair, V

    1989-01-01

    .... The smoking habits, parental smoking habits, sex, and social background of the children who were present on both dates were compared with those of the children who were absent on the second occasion...

  18. Habits predict physical activity on days when intentions are weak.

    Science.gov (United States)

    Rebar, Amanda L; Elavsky, Steriani; Maher, Jaclyn P; Doerksen, Shawna E; Conroy, David E

    2014-04-01

    Physical activity is regulated by controlled processes, such as intentions, and automatic processes, such as habits. Intentions relate to physical activity more strongly for people with weak habits than for people with strong habits, but people's intentions vary day by day. Physical activity may be regulated by habits unless daily physical activity intentions are strong. University students (N = 128) self-reported their physical activity habit strength and subsequently self-reported daily physical activity intentions and wore an accelerometer for 14 days. On days when people had intentions that were weaker than typical for them, habit strength was positively related to physical activity, but on days when people had typical or stronger intentions than was typical for them, habit strength was unrelated to daily physical activity. Efforts to promote physical activity may need to account for habits and the dynamics of intentions.

  19. Integrating the Science of Habit: Opportunities for Occupational Therapy.

    Science.gov (United States)

    Fritz, Heather; Cutchin, Malcolm P

    2016-04-01

    Chronic diseases are the leading causes of early morbidity and mortality in the United States. Because personal behaviors are the primary risk factors for developing chronic diseases, developing effective strategies to modify personal behaviors remains a national imperative. Occupational therapy can help address this problematic situation through interventions based on an understanding of habit and principles of habit modification. The objective of this paper is to provide an evidence-based argument for occupational therapy research and practice targeting health-promoting lifestyle behaviors as habits. We discuss empirical research conducted over the previous decade with a focus on the role of habit in daily behavior, key evidence-based strategies for changing existing habits and developing new habits, and recent advances in habit measurement in relation to issues of intervention design. Understanding habit development, function, and change offers a novel orientation for occupational therapy toward practice and research on many complex health problems. © The Author(s) 2016.

  20. Factors Impacting Habitable Volume Requirements: Results from the 2011 Habitable Volume Workshop

    Science.gov (United States)

    Simon, M.; Whitmire, A.; Otto, C.; Neubek, D. (Editor)

    2011-01-01

    This report documents the results of the Habitable Volume Workshop held April 18-21, 2011 in Houston, TX at the Center for Advanced Space Studies-Universities Space Research Association. The workshop was convened by NASA to examine the factors that feed into understanding minimum habitable volume requirements for long duration space missions. While there have been confinement studies and analogs that have provided the basis for the guidance found in current habitability standards, determining the adequacy of the volume for future long duration exploration missions is a more complicated endeavor. It was determined that an improved understanding of the relationship between behavioral and psychosocial stressors, available habitable and net habitable volume, and interior layouts was needed to judge the adequacy of long duration habitat designs. The workshop brought together a multi-disciplinary group of experts from the medical and behavioral sciences, spaceflight, human habitability disciplines and design professionals. These subject matter experts identified the most salient design-related stressors anticipated for a long duration exploration mission. The selected stressors were based on scientific evidence, as well as personal experiences from spaceflight and analogs. They were organized into eight major categories: allocation of space; workspace; general and individual control of environment; sensory deprivation; social monotony; crew composition; physical and medical issues; and contingency readiness. Mitigation strategies for the identified stressors and their subsequent impact to habitat design were identified. Recommendations for future research to address the stressors and mitigating design impacts are presented.

  1. Which Galaxies Are the Most Habitable?

    Science.gov (United States)

    Kohler, Susanna

    2015-09-01

    Habitable zones are a hot topic in exoplanet studies: where, around a given star, could a planet exist that supports life? But if you scale this up, you get a much less common question: which type of galaxy is most likely to host complex life in the universe? A team of researchers from the UK believes it has the answer.Criteria for HabitabilityLed by Pratika Dayal of the University of Durham, the authors of this study set out to estimate the habitability of a large population of galaxies. The first step in this process is to determine what elements contribute to a galaxys habitability. The authors note three primary factors:Total number of starsMore stars means more planets!Metallicity of the starsPlanets are more likely to form in stellar vicinities with higher metallicities, since planet formation requires elements heavier than iron.Likelihood of Type II supernovae nearbyPlanets that are located out of range of supernovae have a higher probability of being habitable, since a major dose of cosmic radiation is likely to cause mass extinctions or delay evolution of complex life. Galaxies supernova rates can be estimated from their star formation rates (the two are connected via the initial mass function).Hospitable Cosmic GiantsLower panel: the number of Earth-like habitable planets (given by the color bar, which shows the log ratio relative to the Milky Way) increases in galaxies with larger stellar mass and lower star formation rates. Upper panel: the larger stellar-mass galaxies tend to be elliptical (blue line) rather than spiral (red line). Click for larger view. [Dayal et al. 2015]Interestingly, these three conditions have previously been shown to be linked via something termed the fundamental metallicity relation, which relates the total stellar masses, metallicities, and star formation rates of galaxies. By using this relation, the authors were able to create predictions for the number of habitable planets in more than 100,000 galaxies in the local universe

  2. Social, recreational and housing habits of residents of Selebi ...

    African Journals Online (AJOL)

    African Journal for Physical Activity and Health Sciences ... This study presents a survey of the existing status of the social, recreational and housing habits related to the environmental health of residents living within the ... Keywords: environmental health, housing habits, nickel-copper, social and recreational habits

  3. Foliar habit in mistletoe–host associations1

    National Research Council Canada - National Science Library

    Glatzel, Gerhard; Grabner, Michael; Richter, Hanno; Amico, Guillermo; Barlow, Bryan A; Devkota, Mohan Prasad; Lee, Sugwang; Lin, Ruozhu

    2017-01-01

    ... of deciduous and evergreen Loranthus species and their hosts in Eurasia. To compare the foliar habit of host trees, which take up water and nutrients from the soil, with the foliar habit of their parasites, some general remarks on foliar habit in trees, in particular on deciduousness, are necessary. Deciduousness is considered to be an adaption of perennial pla...

  4. Teaching Healthy Habits to Young Children: Handwashing, Toileting and Toothbrushing

    Science.gov (United States)

    Oshikanlu, Seyi

    2006-01-01

    Teaching children habits is a routine part of many early childhood program curricula, with teachers never really stopping to think about what or how teaching is affecting their students. Habits are formed with consistent practice. Habits can be taught to children easily when teachers have some creativity to the actions. In this article, the author…

  5. Habits as knowledge structures: automaticity in goal-directed behavior

    NARCIS (Netherlands)

    Aarts, H.A.G.; Dijksterhuis, A.J.

    2000-01-01

    This study tested the idea of habits as a form of goal-directed automatic behavior. Expanding on the idea that habits are mentally represented as associations between goals and actions, it was proposed that goals are capable of activating the habitual action. More specific, when habits are

  6. 29 CFR 18.406 - Habit; routine practice.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 1 2010-07-01 2010-07-01 true Habit; routine practice. 18.406 Section 18.406 Labor Office... OFFICE OF ADMINISTRATIVE LAW JUDGES Rules of Evidence Relevancy and Its Limits § 18.406 Habit; routine practice. Evidence of the habit of a person or of the routine practice of an organization, whether...

  7. Habit formation and consumption of energy for heating

    DEFF Research Database (Denmark)

    Leth-Petersen, Søren

    2007-01-01

    In this paper we ask if consumption of energy for space heating by households is habit forming. A model of intertemporal consumption allocation allowing for habit-forming preferences is estimated on a register-based panel data set with high quality information about consumption of natural gas...... for a sample of Danish households. Results indicate that preferences are weakly habit forming...

  8. Geology and Habitability of Terrestrial Planets

    CERN Document Server

    Fishbaugh, Kathryn E; Raulin, François; Marais, David J; Korablev, Oleg

    2007-01-01

    Given the fundamental importance of and universal interest in whether extraterrestrial life has developed or could eventually develop in our solar system and beyond, it is vital that an examination of planetary habitability goes beyond simple assumptions such as, "Where there is water, there is life." This book has resulted from a workshop at the International Space Science Institute (ISSI) in Bern, Switzerland (5-9 September 2005) that brought together planetary geologists, geophysicists, atmospheric scientists, and biologists to discuss the multi-faceted problem of how the habitability of a planet co-evolves with the geology of the surface and interior, the atmosphere, and the magnetosphere. Each of the six chapters has been written by authors with a range of expertise so that each chapter is itself multi-disciplinary, comprehensive, and accessible to scientists in all disciplines. These chapters delve into what life needs to exist and ultimately to thrive, the early environments of the young terrestrial pl...

  9. Nutritive and nonnutritive sucking habits: a review.

    Science.gov (United States)

    Turgeon-O'Brien, H; Lachapelle, D; Gagnon, P F; Larocque, I; Maheu-Robert, L F

    1996-01-01

    The habit of sucking is the first coordinated muscular activity of the infant. There are essentially two forms of sucking: the nutritive form which provides essential nutrients, while non-nutritive sucking insures a feeling of warmth and a sense of security. This review gives a description of the anatomy and physiology of sucking together with the influence of breastfeeding and bottle-feeding (conventional or orthodontic nipples) on the dentofacial structures of the infant. Factors involved in the choice of feeding are also discussed. Children who do not have access to unrestricted breastfeeding or bottle-fed children may satisfy their instinctive sucking urge with a pacifier. This paper presents the different types of pacifiers (conventional or orthodontic) along with the beneficial effects provided by pacifiers. Detrimental effects caused by incorrect use of pacifiers or digit-sucking habits are also summarized. Health professionals should inform expectant mothers about the dentofacial advantages of breastfeeding.

  10. Nutritional habits in Italian university students

    Directory of Open Access Journals (Sweden)

    Adele Anna Teleman

    2015-06-01

    Full Text Available INTRODUCTION: Dietary habits have been indicated by research as key elements in both disease pathogenesis and prevention and health promotion. MATERIALS AND METHODS: We analyzed data collected from Italian university students regarding consumption of fruits, vegetables, fast-foods, sweets, energizing drinks, and coffee, average number of eating episodes per day and regularity of breakfast habits. RESULTS: 44% of the university student population eats in average at least 1 portion of fruit per day. 22.5% eats at least 2 portions of vegetables per day. 8.5% eats in average 5 times per day with 48.6% declaring an average of 3 eating episodes per day. 11.3% consumes eccessive amounts of caffeine. 49.1% of the females reaches the recommended consumption of fruit, compared to only 33.8% of males (p < 0.05. 27.7% of females eats at least 2 portions of vegetables per day, compared to 12.0% of males (p < 0.05. Eccessive coffee drinkers pass from 8.9% in the 18-21 age group to 16% in the 25-30 year old age group (p < 0.05. DISCUSSION: This study showed that the eating habits of young adults do not follow national recommendations. Less than 50% of university students eats at least 1 portion of fruit per day and less than 1 out of 4 eats at least 2 portions of vegetables per day. Less than 10% of the students eats in average 5 times per day and more than 1 out of 3 does not have breakfast regularly every morning. CONCLUSION: Interventions targeting university students are required in order to increase their knowledge on healthy eating habits and to ameliorate their dietary behaviours.

  11. SLEEP HABITS AMONG FIRST YEAR MEDICAL STUDENTS

    OpenAIRE

    Neera; Varun,; Yogesh

    2016-01-01

    Sleep is part of the rhythm of life; without a good sleep the mind is less adaptive, mood is altered and the body loses the ability to refresh. The sleep-wake cycle of medical students is quite different and sleep deprivation, poor sleep quality, occurrence of napping episodes during the day. This study was designed to assess sleep habits in first year medical students. MATERIAL AND METHODS Participants of this study were healthy medical students of first year MBBS course of S...

  12. Creatures of habit: accounting for the role of habit in implementation research on clinical behaviour change.

    Science.gov (United States)

    Nilsen, Per; Roback, Kerstin; Broström, Anders; Ellström, Per-Erik

    2012-06-09

    Social cognitive theories on behaviour change are increasingly being used to understand and predict healthcare professionals' intentions and clinical behaviours. Although these theories offer important insights into how new behaviours are initiated, they provide an incomplete account of how changes in clinical practice occur by failing to consider the role of cue-contingent habits. This article contributes to better understanding of the role of habits in clinical practice and how improved effectiveness of behavioural strategies in implementation research might be achieved. Habit is behaviour that has been repeated until it has become more or less automatic, enacted without purposeful thinking, largely without any sense of awareness. The process of forming habits occurs through a gradual shift in cognitive control from intentional to automatic processes. As behaviour is repeated in the same context, the control of behaviour gradually shifts from being internally guided (e.g., beliefs, attitudes, and intention) to being triggered by situational or contextual cues. Much clinical practice occurs in stable healthcare contexts and can be assumed to be habitual. Empirical findings in various fields suggest that behaviours that are repeated in constant contexts are difficult to change. Hence, interventions that focus on changing the context that maintains those habits have a greater probability of success. Some sort of contextual disturbance provides a window of opportunity in which a behaviour is more likely to be deliberately considered. Forming desired habits requires behaviour to be carried out repeatedly in the presence of the same contextual cues. Social cognitive theories provide insight into how humans analytically process information and carefully plan actions, but their utility is more limited when it comes to explaining repeated behaviours that do not require such an ongoing contemplative decisional process. However, despite a growing interest in applying

  13. Habitability Concept Models for Living in Space

    Science.gov (United States)

    Ferrino, M.

    2002-01-01

    As growing trends show, living in "space" has acquired new meanings, especially considering the utilization of the International Space Station (ISS) with regard to group interaction as well as individual needs in terms of time, space and crew accommodations. In fact, for the crew, the Spaced Station is a combined Laboratory-Office/Home and embodies ethical, social, and cultural aspects as additional parameters to be assessed to achieve a user centered architectural design of crew workspace. Habitability Concept Models can improve the methods and techniques used to support the interior design and layout of space architectures and at the same time guarantee a human focused approach. This paper discusses and illustrates some of the results obtained for the interior design of a Habitation Module for the ISS. In this work, two different but complementary approaches are followed. The first is "object oriented" and based on Video Data (American and Russian) supported by Proxemic methods (Edward T. Hall, 1963 and Francesca Pregnolato, 1998). This approach offers flexible and adaptive design solutions. The second is "subject oriented" and based on a Virtual Reality environment. With this approach human perception and cognitive aspects related to a specific crew task are considered. Data obtained from these two approaches are used to verify requirements and advance the design of the Habitation Module for aspects related to man machine interfaces (MMI), ergonomics, work and free-time. It is expected that the results achieved can be applied to future space related projects.

  14. No Snowball on Habitable Tidally Locked Planets

    Science.gov (United States)

    Checlair, Jade; Menou, Kristen; Abbot, Dorian S.

    2017-08-01

    The TRAPPIST-1, Proxima Centauri, and LHS 1140 systems are the most exciting prospects for future follow-up observations of potentially inhabited planets. All of the planets orbit nearby M-stars and are likely tidally locked in 1:1 spin-orbit states, which motivates the consideration of the effects that tidal locking might have on planetary habitability. On Earth, periods of global glaciation (snowballs) may have been essential for habitability and remote signs of life (biosignatures) because they are correlated with increases in the complexity of life and in the atmospheric oxygen concentration. In this paper, we investigate the snowball bifurcation (sudden onset of global glaciation) on tidally locked planets using both an energy balance model and an intermediate-complexity global climate model. We show that tidally locked planets are unlikely to exhibit a snowball bifurcation as a direct result of the spatial pattern of insolation they receive. Instead, they will smoothly transition from partial to complete ice coverage and back. A major implication of this work is that tidally locked planets with an active carbon cycle should not be found in a snowball state. Moreover, this work implies that tidally locked planets near the outer edge of the habitable zone with low CO2 outgassing fluxes will equilibrate with a small unglaciated substellar region rather than cycling between warm and snowball states. More work is needed to determine how the lack of a snowball bifurcation might affect the development of life on a tidally locked planet.

  15. Atmospheric Habitable Zones in Y Dwarf Atmospheres

    Energy Technology Data Exchange (ETDEWEB)

    Yates, Jack S.; Palmer, Paul I. [School of GeoSciences, University of Edinburgh (United Kingdom); Biller, Beth; Cockell, Charles S., E-mail: j.s.yates@ed.ac.uk [Centre for Exoplanet Science, University of Edinburgh (United Kingdom)

    2017-02-20

    We use a simple organism lifecycle model to explore the viability of an atmospheric habitable zone (AHZ), with temperatures that could support Earth-centric life, which sits above an environment that does not support life. To illustrate our model, we use a cool Y dwarf atmosphere, such as WISE J085510.83–0714442.5, whose 4.5–5.2 μ m spectrum shows absorption features consistent with water vapor and clouds. We allow organisms to adapt to their atmospheric environment (described by temperature, convection, and gravity) by adopting different growth strategies that maximize their chance of survival and proliferation. We assume a constant upward vertical velocity through the AHZ. We found that the organism growth strategy is most sensitive to the magnitude of the atmospheric convection. Stronger convection supports the evolution of more massive organisms. For a purely radiative environment, we find that evolved organisms have a mass that is an order of magnitude smaller than terrestrial microbes, thereby defining a dynamical constraint on the dimensions of life that an AHZ can support. Based on a previously defined statistical approach, we infer that there are of the order of 10{sup 9} cool Y brown dwarfs in the Milky Way, and likely a few tens of these objects are within 10 pc from Earth. Our work also has implications for exploring life in the atmospheres of temperate gas giants. Consideration of the habitable volumes in planetary atmospheres significantly increases the volume of habitable space in the galaxy.

  16. Defining the place of habit in substance use disorders.

    Science.gov (United States)

    Vandaele, Youna; Janak, Patricia H

    2017-06-27

    It has long been suggested that alcohol or substance use disorders could emerge from the progressive development and dominance of drug habits. Like habits, drug-related behaviors are often triggered by drug-associated cues. Like habits, addictive behaviors are strong, rigid and "hard to break". Like habits, these behaviors are insensitive to their outcome and persist despite negative consequences. "Pathological habit" thus appears as a good candidate to explain the transition to compulsive drug use. However, drug use could also be considered as a goal-directed choice, driven by the expectation of drug outcomes. For example, drug addicts may engage in drug-seeking behaviors because they view the drug as more valuable than available alternatives. Substance use disorders therefore may not be all about habit, nor fully intentional, and could be considered as resulting from an imbalance between goal-directed and habitual control. The main objective of this review is to disentangle the relative contribution of habit formation and impairment of goal-directed behavior in this unbalanced control of addictive behaviors. Although deficits in goal-directed behavior have been demonstrated in alcohol and substance use disorders, reliable demonstration of abnormal habit formation has been curtailed by the paucity of paradigms designed to assess habit as a positive result. Refining our animal and human model of habit is therefore required to precisely define the place of habit in substance use disorders and develop appropriate and adapted neurobehavioral treatments. Copyright © 2017 Elsevier Inc. All rights reserved.

  17. The Force of Habit: Creating and Sustaining a Wellness Lifestyle.

    Science.gov (United States)

    Nemec, Patricia B; Swarbrick, Margaret A; Merlo, David M

    2015-09-01

    Regardless of an individual's mental health status, habits are difficult to establish and/or eliminate. Given the importance of good habits to overall health and wellness, nurses and other mental health service providers need to understand the force of habits (positive and negative), factors that make habit change difficult, and approaches that are likely to facilitate building and maintaining good habits. The current article provides a cursory overview of several factors (i.e., motivation, will-power, and rewards) that impact habit formation. Relevant theories and research are presented. Habit formation can be fostered through a careful analysis of current behaviors, specific and measurable short-term goals or objectives, and a detailed action plan. Copyright 2015, SLACK Incorporated.

  18. Deforming buccal habits in children between 5 and 11 years old in Cienfuegos. 2005. Hábitos bucales deformantes en niños de 5 a 11 años. Cienfuegos, 2005.

    OpenAIRE

    Elsie María Padilla Gómez; Clotilde Mora Pérez; Clara Rosa Rosell Silva; Odalys Acevedo Sierra

    2008-01-01

    Background: Habits are very complex neuromuscular patterns. Deforming buccal habits can obstruct the normal growth and development of stomatognathic system. Objective: To characterize subjects with deforming habits. Method: An observational, descriptive and correlacional study was developed in 341 children between 5 and 11 years old in Cienfuegos from December 2004 to September 2005. In addition to the clin...

  19. Does intrinsic motivation strengthen physical activity habit? Modeling relationships between self-determination, past behaviour, and habit strength.

    Science.gov (United States)

    Gardner, Benjamin; Lally, Phillippa

    2013-10-01

    Habit formation is thought to aid maintenance of physical activity, but little research is available into determinants of habit strength aside from repeated performance. Previous work has shown that intrinsically motivated physical activity, underpinned by inherent satisfaction derived from activity, is more likely to be sustained. We explored whether this might reflect a tendency for self-determined activity to become more strongly habitual. A sample of 192 adults aged 18-30 completed measures of motivational regulation, intention, behaviour, and habit strength. Results showed that self-determined regulation interacted with past behaviour in predicting habit strength: prior action was more predictive of habit strength among more autonomously motivated participants. There was an unexpected direct effect of self-determined regulation on habit strength, independently of past behaviour. Findings offer possible directions for future habit formation work.

  20. New Moon water, exploration, and future habitation

    CERN Document Server

    Crotts, Arlin

    2014-01-01

    Explore Earth's closest neighbor, the Moon, in this fascinating and timely book and discover what we should expect from this seemingly familiar but strange, new frontier. What startling discoveries are being uncovered on the Moon? What will these tell us about our place in the Universe? How can exploring the Moon benefit development on Earth? Discover the role of the Moon in Earth's past and present; read about the lunar environment and how it could be made more habitable for humans; consider whether continued exploration of the Moon is justified; and view rare Apollo-era photos and film still

  1. Smoking habits among pregnant Danish women

    DEFF Research Database (Denmark)

    Kesmodel, Ulrik; Olsen, Sjurdur Frodi

    1999-01-01

    with controls). DESIGN: Case-control nested in cohort study. SETTING AND PARTICIPANTS: A subsample of 503 women from a cohort of 6347 women established between 1989 and 1991 in Aarhus University Hospital. MAIN RESULTS: Measures of agreement between concurrent and retrospective data on smoking status varied......, particularly among women smoking > or = 10 cigarettes/day. CONCLUSIONS: Information on smoking habits could be accurately obtained retrospectively independent of recall time and the pregnancy outcomes studied here. Accuracy diminished with increasing alcohol intake, particularly among heavy smokers....

  2. The Planned Europa Clipper Mission: Exploring Europa to Investigate its Habitability

    Science.gov (United States)

    Pappalardo, Robert T.; Senske, David A.; Korth, Haje; Blaney, Diana L.; Blankenship, Donald D.; Christensen, Philip R.; Kempf, Sascha; Raymond, Carol Anne; Retherford, Kurt D.; Turtle, Elizabeth P.; Waite, J. Hunter; Westlake, Joseph H.; Collins, Geoffrey; Gudipati, Murthy; Lunine, Jonathan I.; Paty, Carol; Rathbun, Julie A.; Roberts, James; E Schmidt, Britney; Soderblom, Jason M.; Europa Clipper Science Team

    2017-10-01

    A key driver of planetary exploration is to understand the processes that lead to habitability across the solar system. In this context, the science goal of the planned Europa Clipper mission is: Explore Europa to investigate its habitability. Following from this goal are three Mission Objectives: 1) Characterize the ice shell and any subsurface water, including their heterogeneity, ocean properties, and the nature of surface-ice-ocean exchange; 2) Understand the habitability of Europa's ocean through composition and chemistry; and 3) Understand the formation of surface features, including sites of recent or current activity, and characterize localities of high science interest. Folded into these three objectives is the desire to search for and characterize any current activity.To address the Europa science objectives, a highly capable and synergistic suite of nine instruments comprise the mission's scientific payload. This payload includes five remote-sensing instruments that observe the wavelength range from ultraviolet through radar, specifically: Europa UltraViolet Spectrograph (Europa-UVS), Europa Imaging System (EIS), Mapping Imaging Spectrometer for Europa (MISE), Europa THErMal Imaging System (E-THEMIS), and Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON). In addition, four in-situ instruments measure fields and particles: Interior Characterization of Europa using MAGnetometry (ICEMAG), Plasma Instrument for Magnetic Sounding (PIMS), MAss Spectrometer for Planetary EXploration (MASPEX), and SUrface Dust Analyzer (SUDA). Moreover, gravity science can be addressed via the spacecraft's telecommunication system, and scientifically valuable engineering data from the radiation monitoring system would augment the plasma dataset. Working together, the planned Europa mission’s science payload would allow testing of hypotheses relevant to the composition, interior, and geology of Europa, to address the potential habitability of this

  3. Critical Dietary Habits in Early Childhood: Principles and Practice.

    Science.gov (United States)

    Kersting, Mathilde; Alexy, Ute; Schürmann, Susanne

    2016-01-01

    The adequacy of a diet is usually evaluated based on nutrient intake. As people eat foods but not nutrients, food-based dietary guidelines (FBDG) are needed. To evaluate dietary habits in infants and young children, the following stepwise approach is suggested: (1) develop country-specific FBDG to identify the potential of common nonfortified foods to ensure adequate nutrient intake and (2) examine potential 'critical' dietary patterns if main food groups are excluded, such as in vegetarian diets or if a family's precarious social status leads to food constraints. The German FBDG for infant and child nutrition demonstrate that a well-designed mixture of common foods results in an adequate supply of nutrients, except for vitamin D, iodine and iron. The following solutions are feasible to address deficiencies in these critical nutrients: routine supplementation (vitamin D), fortified complementary food consumption or supplementation for infants as well as inclusion of table salt in the family diet for children (iodine), and individual pediatric care for infants at risk (iron). In the exclusion of food groups of animal origin from vegetarian diets, several nutrients are at risk of becoming deficient if not substituted. Existing studies characterizing vegetarian children are rare. These were mainly published in the 1980s and 1990s and were biased towards a high social status. Thus, firm conclusions on today's dietary practices and health statuses of European vegetarian children cannot be drawn. A social gradient exists for food patterns and dietary quality in children, but energy intake need not necessarily be affected. Scenarios in Germany suggest that families on unemployment assistance can afford to eat a diet compliant with German FBDG only if they restrict food selection to basic food. Yet, the question of how families cope with financial constraints in everyday life remains. In conclusion, well-designed FBDG provide various opportunities to identify critical

  4. Mars-relevant phosphate minerals and implications for Martian habitability

    Science.gov (United States)

    Adcock, Christopher T.

    This dissertation is comprised of three studies focused on martian phosphate availability, with an introductory chapter introducing and linking the three studies. Chapter two is on the subject of merrillite synthesis. Merrillite is an extraterrestrial Ca-phosphate mineral similar to the mineral whitlockite and is found as a dominant primary phosphate mineral in martian meteorites. The chapter includes methods of whitlockite and merrillite synthesis as well as a detailed characterization of the produced minerals and a mechanism by which charge balance can be maintained when merrillite is synthesized through dehydrogenation of whitlockite. Chapter three presents the results of kinetic and thermodynamic studies on the Mars-relevant minerals chlorapatite and merrillite, as well as the more terrestrially-relevant minerals whitlockite and fluorapatite. The results of these studies indicate that the dominant primary Ca-phosphate minerals on Mars possess higher solubilities that could lead to more than twice the phosphate concentration in solution. Dissolution rates for the Mars-relevant minerals derived in the study, when combined with the higher martian phosphorus abundance, could result in phosphate release rates of up to 45x faster for a given set of aqueous conditions on Mars when compared to Earth. The implications of the results for past or present martian habitability are discussed. In Chapter four, reactive transport modeling was applied to investigate the transport and mobility of phosphate under martian conditions. The kinetic and thermodynamic data derived in Chapter three were combined with Mars mission data, results from an investigation of Mars analog basalts at Craters of the Moon National Monument in Idaho, and previously published data to inform a reactive transport code and model dissolution profiles measured by Mars Exploration Rover (MER) Spirit in Wishstone class rocks. The modeling results suggest phosphate release into near-neutral waters occurred

  5. Family meal traditions. Comparing reported childhood food habits to current food habits among university students.

    Science.gov (United States)

    De Backer, Charlotte J S

    2013-10-01

    The aim of this study is to investigate if reported childhood food habits predict the food habits of students at present. Questions addressed are: does the memory of childhood family meals promote commensality among students? Does the memory of (grand)parents' cooking influence students' cooking? And, is there still a gender difference in passing on everyday cooking skills? Using a cross-sectional survey, 104 students were asked about their current eating and cooking habits, and their eating habits and the cooking behavior of their (grand)parents during their childhood. Results show that frequencies in reported childhood family meals predict frequencies of students' commensality at present. The effects appear for breakfast and dinner, and stay within the same meal: recalled childhood family breakfasts predict current breakfast commensality, recalled childhood family dinners predict current dinner commensality. In terms of recalled cookery of (grand)parents and the use of family recipes a matrilineal dominance can be observed. Mothers are most influential, and maternal grandmothers outscore paternal grandmothers. Yet, fathers' childhood cooking did not pass unnoticed either. They seem to influence male students' cookery. Overall, in a life-stage of transgression students appear to maintain recalled childhood food rituals. Suggestions are discussed to further validate these results. Copyright © 2013 Elsevier Ltd. All rights reserved.

  6. Genetics of growth habit and development of new coleus (Solenostemon scutellarioides (L.) Codd) varieties with trailing habit and bright color.

    Science.gov (United States)

    Nguyen, Phuong; Quesenberry, Kenneth; Clark, David

    2008-01-01

    A high level of genetic variability for growth habit types is observed in tetraploid, cultivated coleus (Solenostemon scutellarioides (L.) Codd). Very few cultivars with trailing habit exist, and those that are available generally have dark green or purple foliage color. Coleus with trailing growth habit is desirable as it increases its utility for use in hanging baskets, mixed containers, and as ground cover. There is a lack of published information on the genetic mechanism controlling growth habit and the development of new trailing types with orange colors. Two commercial cultivars, "Red Trailing Queen" (RQ) with trailing habit and "Sedona" (S) with upright stature, were selfed and crossed (RQ x S) to produce self and F(1) populations. F(2) populations were produced by selfing plants in the F(1) population. For each population analyzed, growth habit was rated on a visual 1-5 phenotypic scale, where 1 = upright, 2 = semi-upright, 3 = prostrate, 4 = semitrailing, and 5 = trailing. Genotypes were assigned to each phenotype, assuming that upright was dominant to trailing. In this study, growth habit was observed to be controlled by a single gene (U) with additive effects, with upright growth habit designated with a UUUU genotype and trailing growth habit designated with a uuuu genotype. In addition, foliage color was rated on a visual 1-5 phenotypic scale, and purple foliage color was found to be dominant to yellow-orange color. Several new coleus selections with trailing growth habit and orange foliage color were successfully developed.

  7. Inflatable habitation for the lunar base

    Science.gov (United States)

    Roberts, M.

    1992-01-01

    Inflatable structures have a number of advantages over rigid modules in providing habitation at a lunar base. Some of these advantages are packaging efficiency, convenience of expansion, flexibility, and psychological benefit to the inhabitants. The relatively small, rigid cylinders fitted to the payload compartment of a launch vehicle are not as efficient volumetrically as a collapsible structure that fits into the same space when packaged, but when deployed is much larger. Pressurized volume is a valuable resource. By providing that resource efficiently, in large units, labor intensive external expansion (such as adding additional modules to the existing base) can be minimized. The expansive interior in an inflatable would facilitate rearrangement of the interior to suite the evolving needs of the base. This large, continuous volume would also relieve claustrophobia, enhancing habitability and improving morale. The purpose of this paper is to explore some of the aspects of inflatable habitat design, including structural, architectural, and environmental considerations. As a specific case, the conceptual design of an inflatable lunar habitat, developed for the Lunar Base Systems Study at the Johnson Space Center, is described.

  8. Shooting habits of youth recreational firearm users.

    Science.gov (United States)

    Stewart, Michael; Meinke, Deanna K; Snyders, Jessica K; Howerton, Kayla

    2014-03-01

    This study surveyed youth recreational firearm users (YRFUs) regarding shooting habits, reported use of hearing protection devices (HPDs), self-assessed auditory status, and attitudes about firearm noise and hearing loss. A descriptive study using a 28-item survey administered by personal interview. Two-hundred and ten youth aged 10 to 17 years responded. Seventy-eight percent of those surveyed began shooting before the age of ten. The majority reported using large caliber firearms capable of rapid fire for both hunting and target practice. Most youths in this study were not aware of, and therefore, were not utilizing HPDs specifically designed for the shooting sports. Ten percent of subjects reported constant tinnitus and 45% notice tinnitus occurred or worsened after shooting. Although the majority of YRFUs reported good or perfect hearing, a small percentage (4-5%) of youth reported having only 'fair" hearing. YRFUs are putting themselves at risk beginning at a young age for noise-induced hearing loss (NIHL) and tinnitus based on self-reported shooting habits and inconsistent use of HPDs during both target practice and hunting activities. This research highlights the need for early education and intervention efforts to minimize the risk of NIHL in youth.

  9. Food habits and beliefs in transitional societies.

    Science.gov (United States)

    Worsley, A

    1998-12-01

    This paper discusses the concept of the nutrition transition in detail. It commences with an overview of societies which are recognised as being in transition. The economic foundations of the transition from traditional to modern (and post-modern societies) will be emphasised. This will be followed by an examination of the nutrition problems and food habits associated with transitional societies. The public health context of such nutritional problems will also be described. Comparisons will be made between the food beliefs and habits held in traditional societies and those in transitional, modern and post-modern societies. It will be argued that nutritional and medical beliefs have come to play more extensive roles in non-traditional societies, most probably through the mass media. Changes in personal values associated with societal transition will be described in relation to the pursuit of luxury foods. Finally, some of the responses to the nutritional problems of transitional societies will be described. The essential roles of government and non-government organisations in moderating harmful effects of the global economy will be elucidated. It will be argued that the success of nutrition interventions such as food-based dietary guideline policies depend on the development of effective national and local social organisations.

  10. Galactic Habitable Zone and Astrobiological Complexity

    Science.gov (United States)

    Vukotic, B.

    2012-12-01

    This is a short thesis description and for the sake of brevity most things are left out. For more details, those interested are further directed to the thesis related papers in this article reference list. Thesis itself is available at the University of Belgrade library "Svetozar Markovic" (Serbian version only). In this thesis we study the astrobiological history of the Galactic habitable zone through the means of numerical modeling. First group of simulations are unidimensional (time-axis) toy models examine the influence of global regulation mechanisms (gamma-ray bursts and supernovae) on temporal evolution of Galactic astrobiological complexity. It is shown that under the assumption of global regulation classical anti SETI arguments can be undermined. Second group of simulations are more complex bidimensional probabilistic cellular automata models of the Galactic thin disk. They confirm the findings of the toy models and give some insights into the spatial clustering of astrobiological complexity. As a new emerging multidisciplinary science the basic concepts of astrobiology are poorly understood and although all the simulations present here do not include some basic physics (such as Galactic kinematics and dynamics), the input parameters are somewhat arbitrary and could use a future refinement (such as the boundaries of the Galactic habitable zone). This is the cause for low weight and high uncertainty in the output results of the simulations. However, the probabilistic cellular automata has shown as a highly adaptable modeling platform that can simulate various class of astrobiological models with great ease.

  11. Exploring New Potentials in Preventing Unhealthy Computer Habits

    DEFF Research Database (Denmark)

    Sonne, Tobias; Grønbæk, Kaj

    2013-01-01

    Each day millions of computer users experience pains due to unhealthy computer habits. Research in this field mainly focuses on encouraging users to take breaks and correct their posture. This paper shows that unhealthy computer habits calls for new sensing solutions. Based on a design process...... including experts in the field of computer-related injuries, The Habit-Aware Mouse prototype was developed. It provides high-accuracy sensing of whether a user's fingers are hovering above the mouse. This kind of hovering is known to cause pains in the forearm. The integration of trans-parent sensing...... in existing products enables medical researchers to gain new insights on unhealthy habits. The Habit-Aware Mouse is a diagnostic sensing tool to get detailed knowledge about the user's unhealthy computer habits. Sensing is the first step to enable feedback, preventing injuries from finger hovering....

  12. Bad habits and bad genes: early 20th-century eugenic attempts to eliminate syphilis and associated "defects" from the United States.

    Science.gov (United States)

    Wilson, Philip K

    2003-01-01

    American eugenists in the early 20th century distinguished "degenerates," including syphilitics, prostitutes, alcoholics and criminals, from the "normal" population by their particular bad habits. From eugenists' viewpoint, these bad habits were derived from bad character, a flaw that stemmed from an individual's bad genes. This essay explores how eugenists during this period characterized syphilitics and those with associated character "defects" in terms of heredity. Additionally, it examines the methods eugenists most frequently advocated to rectify these bad habits. These methods included marriage restriction, immigration control and reproductive sterilization. Overall, eugenists directed their efforts not so much at the "degenerate" as at his or her germ line.

  13. Lower lip sucking habit treated with a lip bumper appliance.

    Science.gov (United States)

    Germeç, Derya; Taner, Tülin Uğur

    2005-11-01

    The patient was an 11-year-old girl with a lower lip sucking habit with increased overjet, maxillary generalized spacing, and mandibular incisor irregularity. Hyperactivity of the mentalis muscle and deepening of the labiomental sulcus because of the abnormal sucking habit was observed. Orthodontic treatment was started with a lip bumper appliance to break the lower lip sucking habit and continued with fixed orthodontic mechanotherapy. The lip bumper appliance therapy resulted in the elimination of the lower lip sucking habit, musculus mentalis hyperactivity, and labiomental strain in addition to a gain in arch length, improvement of the lower incisor inclinations, and overjet reduction.

  14. Breaking the Thumb Sucking Habit: When Compliance Is Essential

    Directory of Open Access Journals (Sweden)

    Orlando Tanaka

    2016-01-01

    Full Text Available The anterior open bite (AOB and posterior cross bite are the most frequent malocclusions associated with prolonged sucking habits. This clinical case illustrates and discusses the use of a Haas-type palatal expander for stopping a thumb sucking habit. The improvement in closing the open bite with discontinuation of the habit was observed. But with the return of the habit and lack of cooperation, the relapse of anterior open bite occurred. Therefore, different approaches are necessary. The need of a multidisciplinary approach, consent, and cooperation are keys to a good prognosis.

  15. An Investigation Into Alternative Television Viewership Habits Of College Students

    National Research Council Canada - National Science Library

    Katie J Damratoski; April R Field; Katie N Mizell; Michael C Budden

    2011-01-01

    .... Research focused on the television viewing habits of college students, current challenges in television advertising and marketing and the increasing use of DVRs and the Internet are investigated...

  16. The Economic Value of Habits in Household Production

    DEFF Research Database (Denmark)

    Bejan, Ioana; Jensen, Carsten Lynge; Andersen, Laura Mørch

    People are prone to habits but how important are they for economic outcomes? In a randomized field experiment we compare two treatments with identical economic incentives to adjust a range of household production activities. Treatments only differ in the extent to which they allow households to a...... to adjust habits relevant for these activities. We utilize smart-metered hourly power consumption to unobtrusively measure treatment effects. We find that preventing habits from being adjusted reduces consumer surplus by 76% suggesting a substantial economic value of habits....

  17. Factors Affecting the Habitability of Earth-like Planets

    Science.gov (United States)

    Meadows, Victoria; NAI-Virtual Planetary Laboratory Team

    2014-03-01

    parameters and the gravitational influence of other planets in the system. A thorough assessment of a planet's environment and its potential habitability is a necessary first step in the search for biosignatures. Targeted environmental characteristics include surface temperature and pressure (e.g. Misra et al., 2013), a census of bulk and trace atmospheric gases, and whether there are signs of liquid water on the planetary surface (e.g. Robinson et al., 2010). The robustness of a planetary biosignature is dependent on being able to characterize the environment sufficiently well, and to understand likely star-planet interactions, to preclude formation of a biosignature gas via abiotic processes such as photochemistry (e.g. Segura et al., 2007; Domagal-Goldman et al., 2011; Grenfell et al., 2012). Here we also discuss potential false positives for O2 and O3, which, in large quantities, are often considered robust biosignatures for oxygenic photosynthesis. There is clearly significant future work required to better identify and understand the key environmental processes and interactions that allow a planet to support life, and to distinguish life's global impact on an environment from the environment itself.

  18. Postcranial morphology and the locomotor habits of living and extinct carnivorans.

    Science.gov (United States)

    Samuels, Joshua X; Meachen, Julie A; Sakai, Stacey A

    2013-02-01

    Members of the order Carnivora display a broad range of locomotor habits, including cursorial, scansorial, arboreal, semiaquatic, aquatic, and semifossorial species from multiple families. Ecomorphological analyses from osteological measurements have been used successfully in prior studies of carnivorans and rodents to accurately infer the locomotor habits of extinct species. This study uses 20 postcranial measurements that have been shown to be effective indicators of locomotor habits in rodents and incorporates an extensive sample of over 300 individuals from more than 100 living carnivoran species. We performed statistical analyses, including analysis of variance (ANOVA) and stepwise discriminant function analysis, using a set of 16 functional indices (ratios). Our ANOVA results reveal consistent differences in postcranial skeletal morphology among locomotor groups. Cursorial species display distal elongation of the limbs, gracile limb elements, and relatively narrow humeral and femoral epicondyles. Aquatic and semiaquatic species display relatively robust, shortened femora and elongate metatarsals. Semifossorial species display relatively short, robust limbs with enlarged muscular attachment sites and elongate claws. Both semiaquatic and semifossorial species have relatively elongate olecranon process of the ulna and enlarged humeral and femoral epicondyles. Terrestrial, scansorial, and arboreal species are characterized by having primarily intermediate features, but arboreal species do show relatively elongate manual digits. Morphological indices effectively discriminate locomotor groups, with cursorial and arboreal species more accurately classified than terrestrial, scansorial, or semiaquatic species. Both within and between families, species with similar locomotor habits converge toward similar postcranial morphology despite their independent evolutionary histories. The discriminant analysis worked particularly well to correctly classify members of the

  19. Nutritional knowledge and dietary habits survey in high school population.

    Science.gov (United States)

    Milosavljević, Dragana; Mandić, Milena L; Banjari, Ines

    2015-03-01

    During adolescence, young people are in a sensitive transition period when they gradually take over the responsibility for their own eating habits, health attitudes and behaviours and create lifelong habits so it is essential that they adopt healthy habits according to dietary recommendations. Knowledge is one of the factors necessary for the changes in dietary habits. The'objective of this study was to gain insight in nutritional knowledge and dietary habits of adolescents. The sample included 117 adolescents aged 17-19 years. Self-administered, anonymous questionnaire, representing modified version of General Nutrition Knowledge Questionnaire was used to assess general characteristics, nutritional knowledge about nutrients, dietary recommendations, sources of nutrients, diet-disease relationship, and dietary habits. Less than one third of adolescents showed satisfactory knowledge, but boys, adolescents from rural environment and overweight adolescents showed significantly lower knowledge unlike others. Meal skipping was present habit, especially for breakfast consumption. Especially high consumption of meat and meat products was noted for boys, while fruit and vegetables for girls. Fad dieting was quite practiced habit, especially in girls and overweight adolescents. Among girls, high consumption of sweets was confirmed, while boys showed high consumption of soft drinks. Television presents the main source of infor- mation about nutrition for adolescents. Collected data shows similarity with other research in Europe and North America that confirm strong influence of globalization and fast spread of unhealthy habits. The results pointed out weak spots in nutritional knowledge and revealed unhealthy eating habits. This information is necessary for the development of new approaches to modulate their knowledge and consequently act on their behaviour. Behavioral changes would include higher number of meals per day, regular breakfast consumption, higher intake of fish

  20. Eating habits and subjective well-being

    DEFF Research Database (Denmark)

    Schnettler, Berta Lorena; Miranda, Horacio; Lobos, Germán

    2015-01-01

    (mean age = 20.9 years, SD = 2.27). The survey included the Health-related Quality of Life Index-4 (HRQOL), Satisfaction with Life Scale (SWLS), Satisfaction with Food-related Life Scale (SWFL), as well as questions about the place of residence, importance of food for well-being, frequency of meals...... with mental health problems, number of days of health-related incapacity, place of residence, socioeconomic status, importance of food for well-being, frequency of breakfast and dinner in the place of residence, frequency of consumption of meat, milk, fruits and vegetables. It was found that most students...... with higher levels of life satisfaction and satisfaction with food-related life live with their parents, eat at home more frequently, report fewer health problems, have healthful eating habits and consider food very important for their well-being. Although it is necessary to promote or improve the campaigns...

  1. Feeding habits of Mesoclemmys vanderhaegei (Testudines: Chelidae

    Directory of Open Access Journals (Sweden)

    Elizangela Silva Brito

    2016-06-01

    Full Text Available We studied the feeding habits of Mesoclemmys vanderhaegei in small water bodies in the central region of the Brazilian Cerrado. We captured 80 individuals, 79 of which [41 (52% females, 27 males (34%, 11 (14% juveniles] had stomach contents for analysis. We identified 64 food item categories. The turtles were eating more animal than plant material, aquatic invertebrates being the most conspicuous diet item found. Plant material was more abundant in females and rare in the diet of juveniles. Mesoclemmys vanderhaegei proved to be an omnivorous and opportunistic chelonian, feeding on a wide range of food items. Although there are differences in the consumption of food items among sexes and age categories, the most consumed food categories were common in all water bodies sampled.

  2. A Maximum Radius for Habitable Planets.

    Science.gov (United States)

    Alibert, Yann

    2015-09-01

    We compute the maximum radius a planet can have in order to fulfill two constraints that are likely necessary conditions for habitability: 1- surface temperature and pressure compatible with the existence of liquid water, and 2- no ice layer at the bottom of a putative global ocean, that would prevent the operation of the geologic carbon cycle to operate. We demonstrate that, above a given radius, these two constraints cannot be met: in the Super-Earth mass range (1-12 Mearth), the overall maximum that a planet can have varies between 1.8 and 2.3 Rearth. This radius is reduced when considering planets with higher Fe/Si ratios, and taking into account irradiation effects on the structure of the gas envelope.

  3. Mars Habitability, Biosignature Preservation, and Mission Support

    Science.gov (United States)

    Oehler, Dorothy Z.; Allen, Carlton C.

    2014-01-01

    Our work has elucidated a new analog for the formation of giant polygons on Mars, involving fluid expulsion in a subaqueous environment. That work is based on three-dimensional (3D) seismic data on Earth that illustrate the mud volcanoes and giant polygons that result from sediment compaction in offshore settings. The description of this process has been published in the journal Icarus, where it will be part of a special volume on Martian analogs. These ideas have been carried further to suggest that giant polygons in the Martian lowlands may be the signature of an ancient ocean and, as such, could mark a region of enhanced habitability. A paper describing this hypothesis has been published in the journal Astrobiology.

  4. User habits and multimodal route planning

    Directory of Open Access Journals (Sweden)

    Géza Katona

    2017-10-01

    Full Text Available The results of route planning researches are monitored by logistic and automotive industries. The economic aspects of the cost saving are in the focus of the attention. An optimal route could cause time or fuel savings. An effective driving or an optimal route is a good basis to achieve an economical aim. Moreover the spread of new automotive solutions especially in case of electric cars the optimisation has particular significance regarding the limited battery storage. Additionally the autonomous car development could not be neglected. As a result the society could expect safer roads, better space usage and effective resource management. Nevertheless the requirements of users are extremely diverse, which is not negligible. Supporting these aims, in this paper the connection between the multimodal route planning and the user requirements are investigated. The examination is focused to a sensitivity analysis and a survey to evaluate the data and support the settings of a user habit effect to the final route.

  5. Habitable zone dependence on stellar parameter uncertainties

    Energy Technology Data Exchange (ETDEWEB)

    Kane, Stephen R., E-mail: skane@sfsu.edu [Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132 (United States)

    2014-02-20

    An important property of exoplanetary systems is the extent of the Habitable Zone (HZ), defined as that region where water can exist in a liquid state on the surface of a planet with sufficient atmospheric pressure. Both ground- and space-based observations have revealed a plethora of confirmed exoplanets and exoplanetary candidates, most notably from the Kepler mission using the transit detection technique. Many of these detected planets lie within the predicted HZ of their host star. However, as is the case with the derived properties of the planets themselves, the HZ boundaries depend on how well we understand the host star. Here we quantify the uncertainties of HZ boundaries on the parameter uncertainties of the host star. We examine the distribution of stellar parameter uncertainties from confirmed exoplanet hosts and Kepler candidate hosts and translate these into HZ boundary uncertainties. We apply this to several known systems with an HZ planet to determine the uncertainty in their HZ status.

  6. Planetary deep interiors, geodesy, and habitability

    Science.gov (United States)

    Dehant, Veronique

    2014-05-01

    The evolution of planets is driven by the composition, structure, and thermal state of their internal core, mantle, lithosphere, crust, and by interactions with possible ocean and atmosphere. This presentation puts in perspective the fundamental understanding of the relationships and interactions between those different planetary reservoirs and their evolution through time. It emphasizes on the deep interior part of terrestrial planets and moons. The core of a planet, when composed of liquid iron alloy, may provide magnetic field and further interaction with the magnetosphere, ingredients believed to be important for the evolution of an atmosphere and of a planet in general. The deep interior is believed to be of high importance for its habitability. Lander and orbiter, even rover at the surface of planets or moons of the solar system help in determining their interior properties. First of all orbiters feel the gravity of the planet and its variations. In particular, the tidal mass redistribution induces changes in the acceleration of the spacecraft orbiting around a planet. The Love number k2 has been determined for Venus, Mars, and the Earth, as well as for Titan and will be deduced for Mercury and for some of the Galilean satellites from new missions such as JUICE (Jupiter Icy satellite Explorer). The properties of the interior can also be determined from the observation of the rotation of the celestial body. Radar observation from the Earth ground stations of Mercury has allowed Margo et al. (2012, JGR) to determine the moments of inertia of Mercury with an unprecedented accuracy. Rovers such as the MERs (Mars Exploration Rovers) allow as well to obtain the precession and nutation of Mars from which the moments of inertia of the planet and its core can be deduced. Future missions such as the InSIGHT (Interior exploration using Seismic Investigations, Geodesy, and Heat Transport) NASA mission will further help in the determination of Mars interior and evolution

  7. Interior Structure and Habitability of Ocean Worlds

    Science.gov (United States)

    Vance, S.; Bills, B. G.; Cammarano, F.; Panning, M. P.; Stähler, S. C.

    2016-12-01

    Earth's habitability depends critically on its interior structure and dynamics. Global redox cycles rely on Earth's mantle for continued flux of reduced materials (e.g., Hayes and Waldbauer 2006). Similarly, the habitability of ocean worlds must be understood in terms of their interior structure and evolution (Zolotov and Shock 2004, Hand et al. 2009, Nimmo and Pappalardo 2016, Vance et al. 2016). Combined seismology, gravity, and magnetic investigations may be able to distinguish between a hot active interior and a cold dead one. To evaluate such investigations, we are developing detailed models of interior density, elastic and anelastic structure, and associated seismic sources and signatures, building on prior work (Cammarano et al. 2006). We will present self-consistent 1-D structural models for ocean world interiors that use available thermodynamic data for fluids, ices, and rocks. Cammarano, F., V. Lekic, M. Manga, M. Panning, and B. Romanowicz (2006). Long-period seismology on Europa: 1. Physically consistent interior models. Journal of Geophysical Research, E12009:doi:10.1029/2006JE002710. Hand, K. P., C. Chyba, J. Priscu, R. Carlson, and K. Nealson (2009). Astrobiology and the Potential for Life on Europa, page 589. Arizona University Press. Hayes, J. M. and J. R. Waldbauer (2006). The carbon cycle and associated redox processes through time. Philosophical Transactions of the Royal Society B: Biological Sciences, 361(1470):931-950. Nimmo, F. and R. T. Pappalardo (2016). Ocean Worlds in the Outer Solar System. Journal of Geophysical Research, doi:10.1002/2016JE005081 Vance, S. D., K. P. Hand, and R. T. Pappalardo (2016). Geophysical controls of chemical disequilibria in Europa. Geophysical Research Letters, doi:10.1002/2016GL068547. Zolotov, M. Y. and E. L. Shock (2004). A model for low-temperature biogeochemistry of sulfur, carbon, and iron on Europa. Journal of Geophysical Research-Planets, 109(E6):E06003.

  8. From good intentions to healthy habits: towards integrated computational models of goal striving and habit formation.

    Science.gov (United States)

    Pirolli, Peter

    2016-08-01

    Computational models were developed in the ACT-R neurocognitive architecture to address some aspects of the dynamics of behavior change. The simulations aim to address the day-to-day goal achievement data available from mobile health systems. The models refine current psychological theories of self-efficacy, intended effort, and habit formation, and provide an account for the mechanisms by which goal personalization, implementation intentions, and remindings work.

  9. Intergenerational and Urban-Rural Health Habits in Chinese Families

    Science.gov (United States)

    Li, Li; Lin, Chunqing; Cao, Haijun; Lieber, Eli

    2009-01-01

    Objective: To explore intergenerational health habits and compare differences between urban and rural families. Methods: A total of 2500 families with children ages 6-18 in China were surveyed regarding their health habits. Results: Urban families reported significantly greater food variety and more time exercising (for fathers and children) than…

  10. Turning shopping habits of young consumers into green

    NARCIS (Netherlands)

    Bialkova, Svetlana; van 't Erve, Sanne; van Hoof, Joris Jasper; Pruyn, Adriaan T.H.; Bigné, Enrique

    2014-01-01

    Consumers have strong shopping habits, and although being aware of sustainable issues, they hardly do green shopping. Therefore, a challenging question is: how to break the old shopping habits and turn those into green? The current study addresses this question looking at barriers and potential

  11. Genetics of growth habit and photoperiodic response to flowering ...

    Indian Academy of Sciences (India)

    2014-04-16

    Apr 16, 2014 ... Development of photoperiod insensitive and determinate type cultivars is one of the major objective of Dolichos bean breeding. For this, an understanding of the genetics of pho- toperiodic sensitivity to flowering time and growth habit is a prerequisite. Genetics of photoperiod sensitivity and growth habit was ...

  12. Primary School Teacher Candidates' Geometric Habits of Mind

    Science.gov (United States)

    Köse, Nilu¨fer Y.; Tanisli, Dilek

    2014-01-01

    Geometric habits of mind are productive ways of thinking that support learning and using geometric concepts. Identifying primary school teacher candidates' geometric habits of mind is important as they affect the development of their future students' geometric thinking. Therefore, this study attempts to determine primary school teachers' geometric…

  13. Computer Habits and Behaviours among Young Children in Singapore

    Science.gov (United States)

    Karuppiah, Nirmala

    2015-01-01

    This exploratory research project was aimed at developing baseline data on computer habits and behaviours among preschool children in Singapore. Three sets of data were collected from teachers, parents and children which are (1) why and how young children use computers; (2) what are the key physical, social and health habits and behaviours of…

  14. MAGNETIC SHIELDING OF EXOMOONS BEYOND THE CIRCUMPLANETARY HABITABLE EDGE

    Energy Technology Data Exchange (ETDEWEB)

    Heller, René [McMaster University, Department of Physics and Astronomy, Hamilton, ON L8S 4M1 (Canada); Zuluaga, Jorge I., E-mail: rheller@physics.mcmaster.ca, E-mail: jzuluaga@fisica.udea.edu.co [FACom - Instituto de Física - FCEN, Universidad de Antioquia, Calle 70 No. 52-21, Medellín (Colombia)

    2013-10-20

    With most planets and planetary candidates detected in the stellar habitable zone (HZ) being super-Earths and gas giants rather than Earth-like planets, we naturally wonder if their moons could be habitable. The first detection of such an exomoon has now become feasible, and due to observational biases it will be at least twice as massive as Mars. However, formation models predict that moons can hardly be as massive as Earth. Hence, a giant planet's magnetosphere could be the only possibility for such a moon to be shielded from cosmic and stellar high-energy radiation. Yet, the planetary radiation belt could also have detrimental effects on exomoon habitability. Here we synthesize models for the evolution of the magnetic environment of giant planets with thresholds from the runaway greenhouse (RG) effect to assess the habitability of exomoons. For modest eccentricities, we find that satellites around Neptune-sized planets in the center of the HZ around K dwarf stars will either be in an RG state and not be habitable, or they will be in wide orbits where they will not be affected by the planetary magnetosphere. Saturn-like planets have stronger fields, and Jupiter-like planets could coat close-in habitable moons soon after formation. Moons at distances between about 5 and 20 planetary radii from a giant planet can be habitable from an illumination and tidal heating point of view, but still the planetary magnetosphere would critically influence their habitability.

  15. Habits: How to Break the Bad and Cultivate the Good

    Science.gov (United States)

    Bellman, Geoffrey

    1976-01-01

    Every trainer and training director should take a close look at his or her habits--good and bad ones. The author provides a series of questions that, when answered by trainers will help them change or get rid of a habit or develop a new one. (BP)

  16. Reading Habit Formation and Relevance' of Effective School Libary ...

    African Journals Online (AJOL)

    This paper examined the roles played by effective school library service in reading habit formation. The analysis of the result of firidings showed that majority of the respondents are females and majority of them fell within the age range of 31 years and above. The result also showed that the foundation of good reading habit ...

  17. Making Ethics a Habit in Your Family Life.

    Science.gov (United States)

    Terkel, Susan Neiburg

    1993-01-01

    Suggests family activities related to moral values: (1) instilling the giving habit; (2) using stories and games to trigger moral reflection; (3) encouraging earth ethics; (4) developing the moral opinion habit; (5) making moral reminders part of the home decor; (6) using every opportunity to teach; and (7) sharing holidays with others. (GLR)

  18. Physical fitness, nutritional habits and daily locomotive action of 12 ...

    African Journals Online (AJOL)

    non-insulin-dependent (type 2) diabetes,. 12 colon cancers,. 2 ... As a result, the prevalence of childhood obesity is increasing ... sociated with limited physical activity and unhealthy nutritional habits. Another goal should be to motivate and create behav- iours that are conducive to better lifestyle habits. CORRespOnDenCe:.

  19. Dietary Habits Prone to Lifestyle-Related Disease

    Science.gov (United States)

    Nagai, M.; Uyama, O.; Kaji, H.

    2013-01-01

    Objective: To evaluate relations among dietary habits, bone mineral density (BMD), visceral fat area (VFA), and arterial stiffness and recommend better dietary habits. Methods: One hundred and six men and 381 women (aged 18-84) received a health checkup and answered questionnaires, with subsequent measurements of BMD (speed of sound), VFA…

  20. The food and feeding habits of the Delagoa threadfin bream ...

    African Journals Online (AJOL)

    Nemipterus bipunctatus is among the Nemipterids that support artisanal fisheries throughout most of the Western Indian Ocean (WIO) region. Despite its economic importance, information on food and feeding habits is poorly known in the region. Feeding habit was examined with respect to size, sex, maturity stages of the ...

  1. Health Status and Lifestyle Habits of US Medical Students: A ...

    African Journals Online (AJOL)

    Background: Evidence shows that physicians and medical students who engage in healthy lifestyle habits are more likely to counsel patients about such behaviors. Yet medical school is a challenging time that may bring about undesired changes to health and lifestyle habits. Aims: This study assessed changes in students' ...

  2. Factors That Were Found to Influence Ghanaian Adolescents’ Eating Habits

    OpenAIRE

    Patricia Mawusi Amos; Freda Dzifa Intiful; Laurene Boateng

    2012-01-01

    The study sought to find out whether factors such as parental, peer, and media influences predict Ghanaian adolescent students’ eating habits. A random selection of 150 students from a population of senior high school students in Ghana were asked to complete the Eating Habits Questionnaire for Adolescents. Data were analyzed by the use of bivariate correlation, t test, and multiple regression analytical techniques usin...

  3. Paternal smoking habits affect the reproductive life span of daughters

    DEFF Research Database (Denmark)

    Fukuda, Misao; Fukuda, Kiyomi; Shimizu, Takashi

    2011-01-01

    The present study assessed whether the smoking habits of fathers around the time of conception affected the period in which daughters experienced menstrual cycles (i.e., the reproductive life span). The study revealed that the smoking habits of the farther shortened the daughters' reproductive life...... span compared with daughters whose fathers did not smoke....

  4. DIURNAL FEEDING PATTERNS AND FOOD HABITS OF LA T ES

    African Journals Online (AJOL)

    habits of Latcs niloticus in the Speke Gulf Lake Victoria during January/February, July/August and December 2002. Feeding activity was ... Mhitu and Chanda ~ Diurnal feeding patterns andfood habits. -)>2. %_fl”“°. Rubafu bay?” Shimti ha ... Power, equipped with a bottom trawl net of. 38 mm mesh cod-end was used for ...

  5. Study habit skills as correlate of academic performance of ...

    African Journals Online (AJOL)

    Study habit is one of the major factors that could influence students' academic attainment. Thus, this study examined study habit skills as correlate of academic performance of undergraduates in Edo state, Nigeria. It employed a correlation research design, using multistage sampling technique. Two hundred and forty eight ...

  6. Weight status and eating habits of adolescent Nigerian urban ...

    African Journals Online (AJOL)

    Weight status and eating habits of adolescent Nigerian urban secondary school girls. ... In this school-based cross-sectional study, data were obtained on the subjectsf eating habits via a structured anonymous self administered questionnaire, while their ... All the students at the two study schools were invited to participate.

  7. Eating habits of students in Vyskov (The Czech Republic).

    Science.gov (United States)

    Jurikova, Jana; Julinkovă, Sona

    2007-01-01

    This project monitored eating habits of 777 students. Most of the students were aged between 18 and 20. This paper presents answers to questions concerning their eating habits. Almost all students have breakfast regularly. 60% of boys and 67% of girls eat lunch regularly. All boys and about 90% of girls have dinner regularly.

  8. Food consumption and eating habits of the respondents

    African Journals Online (AJOL)

    Mr Prosper

    Indeed, healthy food choices improve a child's wellbeing and ability to learn and play normally [1]. Dietary habits in childhood impact growth, development and the prevalence of disease throughout the life cycle. Healthy eating habits should thus be established during childhood [2]. The quality of diet declines as children ...

  9. Habit learning and memory in mammals: behavioral and neural characteristics.

    Science.gov (United States)

    Gasbarri, Antonella; Pompili, Assunta; Packard, Mark G; Tomaz, Carlos

    2014-10-01

    Goal-direct behavior and habit learning represent two forms of instrumental learning; whereas the former is rapidly acquired and regulated by its outcome, the latter is reflexive, elicited by antecedent stimuli rather than their consequences. Habit learning can be generally defined as the acquisition of associations between stimuli and responses. Habits are acquired via experience-dependent plasticity, occurring repeatedly over the course of days or years and becoming remarkably fixed. The distinction between habit learning, as a product of a procedural learning brain system, and a declarative learning system for encoding facts and episodes is based on the hypothesis that memory is composed of multiple systems that have distinct neuroanatomy and operating principles. Here we review recent research analyzing the main behavioral and neural characteristics of habit learning. In particular, we focus on the distinction between goal-directed and habitual behavior, and describe the brain areas and neurotransmitters systems involved in habit learning. The emotional modulation of habit learning in rodents and primates is reviewed, and the implications of habit learning in psychopathology are briefly described. Copyright © 2014 Elsevier Inc. All rights reserved.

  10. Using Habit Reversal to Decrease Filled Pauses in Public Speaking

    Science.gov (United States)

    Mancuso, Carolyn; Miltenberger, Raymond G.

    2016-01-01

    This study evaluated the effectiveness of simplified habit reversal in reducing filled pauses that occur during public speaking. Filled pauses consist of "uh," "um," or "er"; clicking sounds; and misuse of the word "like." After baseline, participants received habit reversal training that consisted of…

  11. Exercise habit formation in new gym members: a longitudinal study.

    Science.gov (United States)

    Kaushal, Navin; Rhodes, Ryan E

    2015-08-01

    Reasoned action approaches have primarily been applied to understand exercise behaviour for the past three decades, yet emerging findings in unconscious and Dual Process research show that behavior may also be predicted by automatic processes such as habit. The purpose of this study was to: (1) investigate the behavioral requirements for exercise habit formation, (2) how Dual Process approach predicts behaviour, and (3) what predicts habit by testing a model (Lally and Gardner in Health Psychol Rev 7:S137-S158, 2013). Participants (n = 111) were new gym members who completed surveys across 12 weeks. It was found that exercising for at least four bouts per week for 6 weeks was the minimum requirement to establish an exercise habit. Dual Process analysis using Linear Mixed Models (LMM) revealed habit and intention to be parallel predictors of exercise behavior in the trajectory analysis. Finally, the habit antecedent model in LLM showed that consistency (β = .21), low behavioral complexity (β = .19), environment (β = .17) and affective judgments (β = .13) all significantly (p habit formation over time. Trainers should keep exercises fun and simple for new clients and focus on consistency which could lead to habit formation in nearly 6 weeks.

  12. Adherence to prophylactic asthma medication: habit strength and cognitions.

    Science.gov (United States)

    Bolman, Catherine; Arwert, Titia G; Völlink, Trijntje

    2011-01-01

    To explain adherence to prophylactic asthma medication (PAM, inhaled corticosteroids) by the attitude, social influence, and self-efficacy (ASE) model added with the concept of habit strength and to study whether habit moderates or mediates relationships between ASE factors and adherence. A mail-out survey was conducted among 139 asthmatic adults. Multiple regression analysis was conducted, with self-reported adherence as the outcome and ASE factors and habit as the independent variables. Simple slope analyses and bootstrapping mediation analyses were also conducted. Having more severe asthma, taking PAM habitually, and perceiving few negative consequences of taking PAM were associated with better adherence. Self-efficacy influenced adherence indirectly through habit. The relationship between social norms and adherence was moderated by habit: In the case of weak habits, a supportive norm in a patient's environment toward taking PAM was positively related to PAM adherence; in the case of strong habits, a supportive norm led to less adherence. Interventions to increase adherence should enhance the formation of habits by stimulating patients to perform the behavior frequently in similar situations by increasing self-efficacy and providing environmental cues, such as reminder devices and pill organizers. In addition, the disadvantages of PAM use should be negated. Copyright © 2011 Elsevier Inc. All rights reserved.

  13. Can Habit Formation be Reconciled with Business Cycle Facts?

    NARCIS (Netherlands)

    Lettau, M.; Uhlig, H.F.H.V.S.

    1995-01-01

    Many asset pricing puzzles can be explained when habit formation is added to standard preferences. We show that utility functions with a habit then gives rise to a puzzle of consumption volatility in place of the asset pricing puzzles when agents can choose consumption and labor optimally in

  14. Budgeting and spending habits of university students in South Africa ...

    African Journals Online (AJOL)

    The aim of this study was to investigate the budgeting and spending habits of university students at a South African university. In addition, the study examined if there is a significant gender difference in the budgeting and spending habits of university students. The study adopted a quantitative research approach with a ...

  15. Exploring Mars for Evidence of Habitable Environments and Life

    Science.gov (United States)

    DesMarais, David J.

    2014-01-01

    The climate of Mars has been more similar to that of Earth than has the climate of any other planet in our Solar System. But Mars still provides a valuable alternative example of how planetary processes and environments can affect the potential presence of life elsewhere. For example, although Mars also differentiated very early into a core, mantle and crust, it then evolved mostly if not completely without plate tectonics and has lost most of its early atmosphere. The Martian crust has been more stable than that of Earth, thus it has probably preserved a more complete record of its earliest history. Orbital observations determined that near-surface water was once pervasive. Orbiters have identified the following diverse aqueous sedimentary deposits: layered phyllosilicates, phyllosilicates in intracrater fans, plains sediments potentially harboring evaporitic minerals, deep phyllosilicates, carbonate-bearing deposits, intracrater clay-sulfate deposits, Meridiani-type layered deposits, valles-type layered deposits, hydrated silica-bearing deposits, and gypsum plains. These features, together with evidence of more vigorous past geologic activity, indicate that early climates were wetter and perhaps also somewhat warmer. The denser atmosphere that was required for liquid water to be stable on the surface also provided more substantial protection from radiation. Whereas ancient climates might have favored habitable environments at least in some localities, clearly much of the Martian surface for most of its history has been markedly less favorable for life. The combination of dry conditions, oxidizing surface environments and typically low rates of sedimentation are not conducive to the preservation of evidence of ancient environments and any biota. Thus a strategy is required whereby candidate sites are first identified and then characterized for their potential to preserve evidence of past habitable environments. Rovers are then sent to explore the most promising

  16. Driving habits in patients with dementia: a report from Alzheimer's disease assessment units in northern Italy.

    Science.gov (United States)

    Mauri, Marco; Sinforiani, Elena; Cuzzoni, Maria Giovanna; Bono, Giorgio; Zucchella, Chiara

    2014-01-01

    The aim of this study was to characterize the driving behavior of a sample of patients with dementia. Demographic and clinical characteristics and parameters considered to be the most significant predictors of driving ability were collected. Of the total 198 patients enrolled, 172 were still driving. Many subjects (30-65%) were found to have modified their driving habits (reducing driving time and mileage, avoiding driving at night and during rush hours, sticking to familiar routes). The patients' own rating of their driving ability was significantly higher than their caregivers' rating (51% versus 29%). Crash history was not a significant variable. The patients' restriction of their driving increased significantly (pgold standard for determining fitness to drive, the patients' driving habits were self-regulated and, in particular, regulated by their caregivers. Age and degree of dementia can be considered among the best predictors of driving safety.

  17. The rotation of planets hosting atmospheric tides: from Venus to habitable super-Earths

    Science.gov (United States)

    Auclair-Desrotour, P.; Laskar, J.; Mathis, S.; Correia, A. C. M.

    2017-07-01

    The competition between the torques induced by solid and thermal tides drives the rotational dynamics of Venus-like planets and super-Earths orbiting in the habitable zone of low-mass stars. The resulting torque determines the possible equilibrium states of the planet's spin. Here we have computed an analytic expression for the total tidal torque exerted on a Venus-like planet. This expression is used to characterize the equilibrium rotation of the body. Close to the star, the solid tide dominates. Far from it, the thermal tide drives the rotational dynamics of the planet. The transition regime corresponds to the habitable zone, where prograde and retrograde equilibrium states appear. We demonstrate the strong impact of the atmospheric properties and of the rheology of the solid part on the rotational dynamics of Venus-like planets, highlighting the key role played by dissipative mechanisms in the stability of equilibrium configurations.

  18. Family eating habits, family support and subjective well-being in university students in Chile

    DEFF Research Database (Denmark)

    Schnettler, Berta; Höger, Yesly; Orellana, Ligia

    2016-01-01

    Aim: To characterize typologies of university students according to the perception of their families’ eating habits. Material and method: A questionnaire was applied to a non-probabilistic sample of 372 students of both genders at the Universidad de La Frontera, Temuco, Chile. The instrument...... included: the Family Eating Habits Questionnaire (FEHQ), the Satisfaction with Life Scale (SWLS), the Satisfaction with Food-related Life Scale (SWFL) and the Family Resources Scale (FRS). Estimated weight and height were asked about as well as sociodemographic variables. Results: Using an exploratory...... factor analysis (EFA) three factors were detected in the FEHQ: importance of eating to family members, cohesiveness of family eating, and pressure to eat. The EFA detected two factors on the FRS: intangible and tangible support. A confirmatory factor analysis (CFA) validated the structure of the FEHQ...

  19. Exoplanetary Atmospheres-Chemistry, Formation Conditions, and Habitability.

    Science.gov (United States)

    Madhusudhan, Nikku; Agúndez, Marcelino; Moses, Julianne I; Hu, Yongyun

    2016-12-01

    Characterizing the atmospheres of extrasolar planets is the new frontier in exoplanetary science. The last two decades of exoplanet discoveries have revealed that exoplanets are very common and extremely diverse in their orbital and bulk properties. We now enter a new era as we begin to investigate the chemical diversity of exoplanets, their atmospheric and interior processes, and their formation conditions. Recent developments in the field have led to unprecedented advancements in our understanding of atmospheric chemistry of exoplanets and the implications for their formation conditions. We review these developments in the present work. We review in detail the theory of atmospheric chemistry in all classes of exoplanets discovered to date, from highly irradiated gas giants, ice giants, and super-Earths, to directly imaged giant planets at large orbital separations. We then review the observational detections of chemical species in exoplanetary atmospheres of these various types using different methods, including transit spectroscopy, Doppler spectroscopy, and direct imaging. In addition to chemical detections, we discuss the advances in determining chemical abundances in these atmospheres and how such abundances are being used to constrain exoplanetary formation conditions and migration mechanisms. Finally, we review recent theoretical work on the atmospheres of habitable exoplanets, followed by a discussion of future outlook of the field.

  20. Nutritional Transition: A Reviewo of Students' Eating Habits

    Directory of Open Access Journals (Sweden)

    Aline Juliana Ricardo

    2012-12-01

    Full Text Available The nutritional transition process has started in Brazil since the modifications of the standard Brazilian food also concomitant with changes in the epidemiological scenario, resulting in a decline of malnutrition, but in a significant increase in obesity in children and adolescents in all socioeconomic classes. The school age comprises the age group between seven and ten years old and is characterized as a period of growth with high nutritional requirements that must be supplied with quality food and in sufficient quantity to prevent future health problems. For this reason, school, teachers and family members should be responsible for the feeding habits of these children, through nutrition education projects, activities related to good nutrition and consistent information according to the real world of children. The aim of this paper is to describe some aspects of the food profile of students and its influence over the increasing incidence and prevalence of obesity and associated to co-morbidities, as well as to identify the transition process that the country has been experiencing.

  1. Individual specialization in the foraging habits of female bottlenose dolphins living in a trophically diverse and habitat rich estuary

    Science.gov (United States)

    Rossman, Sam; Ostrom, Peggy H.; Stolen, Megan; Barros, Nélio B.; Gandhi, Hasand; Stricker, Craig A.; Wells, Randall S.

    2015-01-01

    We examine individual specialization in foraging habits (foraging habitat and trophic level) of female bottlenose dolphins (Tursiops truncatus) resident in Sarasota Bay, Florida, USA, by analyzing time series of stable isotope (δ15N and δ13C) values in sequential growth layer groups within teeth. The isotope data provide a chronology of foraging habits over the lifetime of the individual and allowed us to show that female bottlenose dolphins exhibit a high degree of individual specialization in both foraging habitat and trophic level. The foraging habits used by adult females are similar to those they used as calves and may be passed down from mother to calf through social learning. We also characterized the foraging habits and home range of each individual by constructing standard ellipses from isotope values and dolphin sightings data (latitude and longitude), respectively. These data show that Sarasota Bay bottlenose dolphins forage within a subset of the habitats in which they are observed. Moreover, females with similar observational standard ellipses often possessed different foraging specializations. Female bottlenose dolphins may demonstrate individual specialization in foraging habits because it reduces some of the cost of living in groups, such as competition for prey.

  2. What undermines healthy habits with regard to physical activity and food? Voices of adolescents in a disadvantaged community.

    Science.gov (United States)

    Jonsson, Linus; Larsson, Christel; Berg, Christina; Korp, Peter; Lindgren, Eva-Carin

    2017-12-01

    This study aimed to illuminate factors that undermine the healthy habits of adolescents from a multicultural community with low socioeconomic status (S.E.S.) in Sweden with regard to physical activity (P.A.) and food, as stated in their own voices. Adolescents (n = 53, 12-13 y/o) were recruited from one school situated in a multicultural community characterized by low S.E.S. Embracing an interpretive approach, 10 focus-group interviews were conducted to produce data for the study. The focus-group interviews were audio recorded, transcribed verbatim, and analysed using qualitative content analysis. The analysis resulted in two major themes: (1) the availability of temptations is large, and support from the surroundings is limited; and (2) norms and demands set the agenda. The adolescents' voices illuminate a profound awareness and the magnitude of tempting screen-based activities as undermining their P.A. and healthy food habits. Moreover, several gender boundaries were highlighted as undermining girls' P.A. and healthy food habits. The adolescents' stories illuminated that it is difficult for them, within their environment, to establish healthy habits with regard to P.A. and food. To facilitate the adolescents' healthy habits, we suggest that support from family, friends, the school, and society at large is essential.

  3. A Pragmatic Path to Investigating Europa's Habitability

    Science.gov (United States)

    Pappalardo; Bengenal; Bar; Bills; Blankenship; Connerney; Kurth; McGrath; Moore; Prockter; hide

    2011-01-01

    Assessment of Europa's habitability, as an overarching science goal, will progress via a comprehensive investigation of Europa's subsurface ocean, chemical composition, and internal dynamical processes, The National Research Council's Planetary Decadal Survey placed an extremely high priority on Europa science but noted that the budget profile for the Jupiter Europa Orbiter (1EO) mission concept is incompatible with NASA's projected planetary science budget Thus, NASA enlisted a small Europa Science Definition Team (ESDT) to consider more pragmatic Europa mission options, In its preliminary findings (May, 2011), the ESDT embraces a science scope and instrument complement comparable to the science "floor" for JEO, but with a radically different mission implementation. The ESDT is studying a two-element mission architecture, in which two relatively low-cost spacecraft would fulfill the Europa science objectives, An envisioned Europa orbital element would carry only a very small geophysics payload, addressing those investigations that are best carried out from Europa orbit An envisioned separate multiple Europa flyby element (in orbit about Jupiter) would emphasize remote sensing, This mission architecture would provide for a subset of radiation-shielded instruments (all relatively low mass, power, and data rate) to be delivered into Europa orbit by a modest spacecraft, saving on propellant and other spacecraft resources, More resource-intensive remote sensing instruments would achieve their science objectives through a conservative multiple-flyby approach, that is better situated to handle larger masses and higher data volumes, and which aims to limit radiation exposure, Separation of the payload into two spacecraft elements, phased in time, would permit costs to be spread more uniformly over mUltiple years, avoiding an excessively high peak in the funding profile, Implementation of each spacecraft would be greatly simplified compared to previous Europa mission

  4. Effect of smoking habits on sleep

    Directory of Open Access Journals (Sweden)

    S.G. Conway

    2008-08-01

    Full Text Available To evaluate the effect of smoking habits on sleep, data from 1492 adults referred to the Sleep Institute were accessed and divided into 3 categories of smoking status: current, former and non-smokers. Categories of pack-years (<15 and ≥15 defined smoking severity. The association of smoking status and smoking severity with sleep was analyzed for sleep parameters, especially apnea and hypopnea index (AHI ≥5, more than 5% of total sleep time (TST spent with oxyhemoglobin saturation (SaO2 <90%, and arousal index. The arousal index was higher among current (21 ± 17 and former smokers (20 ± 17 than non-smokers (17 ± 15; P < 0.04. Former smokers had a higher percent of TST at SaO2 <90% than non-smokers (9 ± 18 vs 6 ± 13; P < 0.04. Former smokers with pack-years ≥15 compared to <15 exhibited higher AHI (22 ± 24 vs 16 ± 21; P < 0.05 and arousal index (22 ± 19 vs 18 ± 15; P < 0.05. Current smokers with pack-years ≥15 compared to <15 exhibited higher arousal index (23 ± 18 vs 18 ± 16; P < 0.05 and percent of TST at SaO2 <90% (11 ± 17 vs 6 ± 13; P < 0.05. Smoking status and pack-years were not associated with AHI ≥5 on logistic regression analysis, but current smokers with pack-years ≥15 were 1.9 times more likely to spend more than 5% of TST at SaO2 <90% than non-smokers (95%CI = 1.21-2.97; P = 0.005. The variability of arousal index was influenced by gender, AHI and current smokers with pack-years ≥15 (all P < 0.01. Smoking habits seem to be associated with arousal and oxyhemoglobin desaturation during sleep, but not with AHI. The effect was more pronounced in current than former smokers.

  5. Promoting healthy bladder habits for seniors.

    Science.gov (United States)

    Newman, D K; Wallace, J; Blackwood, N; Spencer, C

    1996-01-01

    Urinary incontinence (UI) effects people of all ages, but is especially prevalent in the elderly population. Also significant is a lack of knowledge about UI. A health promotion project was developed and implemented in six ethnically diverse, predominantly minority, inner city senior centers, a program designed to address an elder population, as they are very likely to be experiencing UI and lacking knowledge concerning healthy bladder habits. The project consisted of three phases: orientation/training of key staff members/peer educators at the six senior centers; educating elder consumers through four one-hour weekly sessions involving visual aids and completion of bladder records and quizzes, and follow-up sessions with senior staff/peer educators to reinforce previous training. One result was that training of peer educators needed further refinement to allow for a more significant role throughout the program. The program was very well received by the participants and roughly 80 percent felt they had more control over their bladder by the end of the last session. This project will continue into 1997 and in addition to information on UI, the project will include prostate health for men and gynecological health for women, as this need became evident throughout the program.

  6. CASH 2021: commercial access and space habitation.

    Science.gov (United States)

    Aldrin, Andrew; Amara, Adam; Aris, Lodewijk; Baierl, Nida; Beatty, Patrick; Beaulieu, Catherine; Behnke, Torsten; Castegini, Roberta; Chauhan, Amitabh; Cojanis, Philip; Dayawansa, Pelawa; Diop, Marie; Eito, Kinya; Engle, Steve; Feretti, Stefano; Gassama, Hamet; Genova, Bojana; Goulding, Colin; Janjua, Jameel; Jansaeng, Thidarat; Jousset, Frederic; Kopik, Anatoly; Laurin, Catherine; Leggatt, Jason; Li, Hengnian; Mezzadri, Monica; Miura, Amane; Nolet, Simon; Ogami, Satoshi; Patry, Johanne; Patten, Laryssa; Payerne, Cyril; Peer, Guy; Prampolini, Marco; Rheaume, Caroline; Saary, Joan; Spehar, Daniela; Sufi, Atiya; Sun, Baosheng; Thompson, J Barry; Thomson, Ward; Trautner, Roland; Tursunmuratov, Murat; Venet, Vrata; Wilems, Elizabeth; Wilson, Helen; Wittwer, Karl; Wokke, Frank; Wu, Yansheng; Zhou, Shaobin; Zilioli, Ilaria

    2002-01-01

    Issues about commercialization of space have been a growing concern in the past decade for the space community. This paper focuses on the work from a team of 51 students attending the Summer Session Program of the International Space University in Bremen, Germany. CASH 2021 (Commercial Access and Space Habitation) documents a plan that identifies commercial opportunities for space utilization that will extend human presence in space, and will chart the way forward for the next 20 years. The group selected four commercial sectors that show the most promise for the future: tourism, entertainment, space system service, assembly and debris removal, and research and development/production. The content of this document presents the results of their research. Historical activities in each of the commercial sectors are reviewed along with the current market situation. To provide a coherent background for future commercialization possibilities a scenario has been developed. This scenario includes a postulated upon ideal future and includes social, political and economic factors that may affect the space industry over the timeline of the study. The study also presents a roadmap, within the limited optimistic scenario developed, for the successful commercialization of space leading to future human presence in space. A broad range of commercially viable opportunities, not only within the current limits of the International Space Station, but also among the many new developments that are expected by 2021 are discussed. c2002 International Astronautical Federation. Published by Elsevier Science Ltd. All rights reserved.

  7. Liquid Water Restricts Habitability in Extreme Deserts.

    Science.gov (United States)

    Cockell, Charles S; Brown, Sarah; Landenmark, Hanna; Samuels, Toby; Siddall, Rebecca; Wadsworth, Jennifer

    2017-04-01

    Liquid water is a requirement for biochemistry, yet under some circumstances it is deleterious to life. Here, we show that liquid water reduces the upper temperature survival limit for two extremophilic photosynthetic microorganisms (Gloeocapsa and Chroococcidiopsis spp.) by greater than 40°C under hydrated conditions compared to desiccated conditions. Under hydrated conditions, thermal stress causes protein inactivation as shown by the fluorescein diacetate assay. The presence of water was also found to enhance the deleterious effects of freeze-thaw in Chroococcidiopsis sp. In the presence of water, short-wavelength UV radiation more effectively kills Gloeocapsa sp. colonies, which we hypothesize is caused by factors including the greater penetration of UV radiation into hydrated colonies compared to desiccated colonies. The data predict that deserts where maximum thermal stress or irradiation occurs in conjunction with the presence of liquid water may be less habitable to some organisms than more extreme arid deserts where organisms can dehydrate prior to being exposed to these extremes, thus minimizing thermal and radiation damage. Life in extreme deserts is poised between the deleterious effects of the presence and the lack of liquid water. Key Words: Deserts-Extremophiles-Stress-High temperatures-UV radiation-Desiccation. Astrobiology 17, 309-318.

  8. Four Bad Habits of Modern Psychologists.

    Science.gov (United States)

    Grice, James; Barrett, Paul; Cota, Lisa; Felix, Crystal; Taylor, Zachery; Garner, Samantha; Medellin, Eliwid; Vest, Adam

    2017-08-14

    Four data sets from studies included in the Reproducibility Project were re-analyzed to demonstrate a number of flawed research practices (i.e., "bad habits") of modern psychology. Three of the four studies were successfully replicated, but re-analysis showed that in one study most of the participants responded in a manner inconsistent with the researchers' theoretical model. In the second study, the replicated effect was shown to be an experimental confound, and in the third study the replicated statistical effect was shown to be entirely trivial. The fourth study was an unsuccessful replication, yet re-analysis of the data showed that questioning the common assumptions of modern psychological measurement can lead to novel techniques of data analysis and potentially interesting findings missed by traditional methods of analysis. Considered together, these new analyses show that while it is true replication is a key feature of science, causal inference, modeling, and measurement are equally important and perhaps more fundamental to obtaining truly scientific knowledge of the natural world. It would therefore be prudent for psychologists to confront the limitations and flaws in their current analytical methods and research practices.

  9. [Hospital fluoroquinolone prescription habits in northern France].

    Science.gov (United States)

    Levent, T; Cabaret, P

    2010-09-01

    The aim of the study was to assess the good use organization and fluoroquinolone prescription habits in cases of bone and joint, urinary, pulmonary, and digestive infections. A declarative survey was made (questionnaire for the hospital and for the prescriber). Thirty percent (44/145) of hospitals participated with 274 prescribers. Eighty percent had prescription protocols, 71 % of clinicians had access to epidemiologic data. A percentage of 30.7 (853/2,771) of prescriptions included a fluoroquinolone, 44.5 % (380/853) among these had not been recommended. The excessive prescription reached 24.4 % (116/474) in case of bone and joint infection, 14.6 % (107/731), and 20 % (157/779) in cases of digestive and respiratory infection respectively. Prescriptions for urinary infection were adequate in 47.6 % (375/787) of cases. Inadequate prescriptions were made because of bad knowledge of bacteria resistance epidemiology and pharmacology (insufficient dose, monotherapy at risk of selection), and non-application of good practice recommendations. This study justifies the rationalization of antibiotic prescription. Copyright © 2010 Elsevier Masson SAS. All rights reserved.

  10. Customer habits and the Datourway strategy

    Directory of Open Access Journals (Sweden)

    Talabos István

    2014-01-01

    Full Text Available The different funds of European Union - ISPA, PHARE, SAPARD - ensured the possibility not only to work out developing projects, but also they provided possibility to realize them. These funds' aim was rural development, spatial development, development of economy but tourism has never been nominated. After the year of 2004 tourism received attention and several funds of European Union aimed at development of infrastructure for tourism, development of thematic routes, development of accommodation, etc. There were several strategies prepared for the Danube, and the Datourway project had its special name: Transnational Strategy for the Sustainable Territorial Development of the Danube Area with special regard to Tourism. The Danube is undervalued from the tourism point of view. In the participating countries the capitals, seaside, beaches, mountains are considered real attractions and it means that the tourism strategy for the Danube is a challenging task. The final and main outcome is not only the strategy for tourism considering the customer habits, but an Investment Guide Book pointing out the common values of destination and attraction development together with 'best practices' common projects for the different types of regions too, in order to serve the development of Danube Region.

  11. Habitability & Astrobiology Research in Mars Terrestrial Analogues

    Science.gov (United States)

    Foing, Bernard

    2014-05-01

    We performed a series of field research campaigns (ILEWG EuroMoonMars) in the extreme Utah desert relevant to Mars environments, and in order to help in the interpretation of Mars missions measurements from orbit (MEX, MRO) or from the surface (MER, MSL), or Moon geochemistry (SMART-1, LRO). We shall give an update on the sample analysis in the context of habitability and astrobiology. Methods & Results: In the frame of ILEWG EuroMoonMars campaigns (2009 to 2013) we deployed at Mars Desert Research station, near Hanksville Utah, a suite of instruments and techniques [A, 1, 2, 9-11] including sample collection, context imaging from remote to local and microscale, drilling, spectrometers and life sensors. We analyzed how geological and geochemical evolution affected local parameters (mineralogy, organics content, environment variations) and the habitability and signature of organics and biota. Among the important findings are the diversity in the composition of soil samples even when collected in close proximity, the low abundances of detectable PAHs and amino acids and the presence of biota of all three domains of life with significant heterogeneity. An extraordinary variety of putative extremophiles was observed [3,4,9]. A dominant factor seems to be soil porosity and lower clay-sized particle content [6-8]. A protocol was developed for sterile sampling, contamination issues, and the diagnostics of biodiversity via PCR and DGGE analysis in soils and rocks samples [10, 11]. We compare the 2009 campaign results [1-9] to new measurements from 2010-2013 campaigns [10-12] relevant to: comparison between remote sensing and in-situ measurements; the study of minerals; the detection of organics and signs of life. Keywords: field analogue research, astrobiology, habitability, life detection, Earth-Moon-Mars, organics References [A] Foing, Stoker & Ehrenfreund (Editors, 2011) "Astrobiology field Research in Moon/Mars Analogue Environments", Special Issue of International

  12. Breakfast eating habits among medical students.

    Science.gov (United States)

    Ackuaku-Dogbe, E M; Abaidoo, B

    2014-06-01

    Breakfast is often thought to be the most important meal of the day as it is known to provide energy for the brain and improve learning. It is also known to contribute significantly to the total daily energy and nutrient intake. Skipping breakfast may affect performance during the rest of the day. To determine the level of breakfast skipping among medical students and its effect on their attention span and level of fatigue during clinical sessions. A descriptive cross-sectional study of breakfast eating habits among medical students at the University of Ghana Medical School, Korle Bu-Accra. The University of Ghana Medical School, Korle Bu-Accra. Questionnaires were distributed to second year (pre-clinical) medical students studying the basic sciences and clinical students in ophthalmology to be self-administered. Interview data was captured and analyzed using SPSS version 17.0. The total number of pre-clinical students recruited was 154 and clinical students 163 bringing to a total of 317 students made up of 203 males and 114 females (M: F=1.8:1). The overall breakfast skipping among the students was 71.92%. The prevalence among the pre-clinical students was 76.62% and clinical students 67.48%. Generally, breakfast skipping was significantly related to fatigue and poor attention during clinical sessions. This study suggests that the medical students, both pre-clinical and clinical, skip breakfast and this may affect their studies adversely.

  13. Phthalate Metabolites, Consumer Habits and Health Effects

    Directory of Open Access Journals (Sweden)

    Peter Wallner

    2016-07-01

    Full Text Available Phthalates are multifunctional chemicals used in a wide variety of consumer products. The aim of this study was to investigate whether levels of urinary phthalate metabolites in urine samples of Austrian mothers and their children were associated with consumer habits and health indicators. Within an Austrian biomonitoring survey, urine samples from 50 mother-child pairs of five communities (two-stage random stratified sampling were analysed. The concentrations of 14 phthalate metabolites were determined, and a questionnaire was administered. Monoethyl phthalate (MEP, mono-n-butyl phthalate (MnBP, mono-isobutyl phthalate (MiBP, monobenzyl phthalate (MBzP, mono-(2-ethylhexyl phthalate (MEHP, mono-(2-ethyl-5-hydroxyhexyl phthalate (5OH-MEHP, mono-(2-ethyl-5-oxohexyl phthalate (5oxo-MEHP, mono-(5-carboxy-2-ethylpentyl phthalate (5cx-MEPP, and 3-carboxy-mono-propyl phthalate (3cx-MPP could be quantified in the majority of samples. Significant correlations were found between the use of hair mousse, hair dye, makeup, chewing gum, polyethylene terephthalate (PET bottles and the diethyl phthalate (DEP metabolite MEP. With regard to health effects, significant associations of MEP in urine with headache, repeated coughing, diarrhoea, and hormonal problems were observed. MBzP was associated with repeated coughing and MEHP was associated with itching.

  14. Stable habitable zones of single Jovian planet systems

    Science.gov (United States)

    Agnew, Matthew T.; Maddison, Sarah T.; Thilliez, Elodie; Horner, Jonathan

    2017-11-01

    With continued improvement in telescope sensitivity and observational techniques, the search for rocky planets in stellar habitable zones is entering an exciting era. With so many exoplanetary systems available for follow-up observations to find potentially habitable planets, one needs to prioritize the ever-growing list of candidates. We aim to determine which of the known planetary systems are dynamically capable of hosting rocky planets in their habitable zones, with the goal of helping to focus future planet search programmes. We perform an extensive suite of numerical simulations to identify regions in the habitable zones of single Jovian planet systems where Earth-mass planets could maintain stable orbits, specifically focusing on the systems in the Catalog of Earth-like Exoplanet Survey Targets (CELESTA). We find that small, Earth-mass planets can maintain stable orbits in cases where the habitable zone is largely, or partially, unperturbed by a nearby Jovian, and that mutual gravitational interactions and resonant mechanisms are capable of producing stable orbits even in habitable zones that are significantly or completely disrupted by a Jovian. Our results yield a list of 13 single Jovian planet systems in CELESTA that are not only capable of supporting an Earth-mass planet on stable orbits in their habitable zone, but for which we are also able to constrain the orbits of the Earth-mass planet such that the induced radial velocity signals would be detectable with next generation instruments.

  15. Multiple socio-economic circumstances and healthy food habits.

    Science.gov (United States)

    Lallukka, T; Laaksonen, M; Rahkonen, O; Roos, E; Lahelma, E

    2007-06-01

    To examine associations between seven indicators of socio-economic circumstances and healthy food habits, while taking into account assumed temporal order between these socio-economic indicators. Data were derived from cross-sectional postal questionnaires in 2000-2002. Socio-economic circumstances were assessed by parental education, childhood economic difficulties, own education, occupational class, household income, home ownership and current economic difficulties. Healthy food habits were measured by an index consisting of consumption of fresh vegetables, fruit or berries, rye bread, fish and choosing vegetable fats on bread and oil in cooking. Sequential logistic regression models were used, adjusting for age and marital status. Employees of the City of Helsinki, Finland (n=8960, aged 40-60 years). Healthy food habits were reported by 28% of women and by 17% of men. Own education, occupational class, household income, home ownership and current economic difficulties were associated with healthy food habits. These associations were attenuated but mainly remained after mutual adjustments for the socio-economic indicators. Among women, a pathway was found suggesting that part of the effects of education on food habits were mediated through occupational class. Employees in higher and lower socio-economic positions differ in their food habits, and those in lower positions and economically disadvantaged are less likely to report healthy food habits. Health promotion programmes and food policies should encourage healthier food choices among those in lower socio-economic positions and among those with economic difficulties in particular.

  16. Reading habits of secondary school students in Serbia

    Directory of Open Access Journals (Sweden)

    Krnjaić Zora

    2011-01-01

    Full Text Available Within the research study about free time, interests, cultural needs and habits of secondary school students, their reading habits were studied in particular. The paper is aimed at exploring the reading habits of secondary school students, which are expressed through different media, first and foremost, through book reading, as well as through reading the press and using the internet, and to determine the connection between them. The research was conducted by means of a questionnaire on the sample of 2426 students from 26 secondary schools from nine Serbian towns. The results referring to the level of development of reading habits of our secondary school students indicate that: 12% of students do not read; 21% read only the required reading; 40% read the required reading and occasionally the books that are not required; 20% read the required reading and often other books as well; and 7% are passionate readers. Secondary school students do not have a formed habit of using library services and most frequently read popular literature and popular science. The most frequently read texts in the press refer to leisure and sports. More developed reading habits of secondary school students are related to reading the sections on culture in daily newspapers, reading popular science magazines and using educational software. Educational implications of the paper indicate that it is necessary to develop students’ reading habits through teaching and learning and to encourage students to use both books and the modern media for learning purposes.

  17. The promotion of unhealthy habits in gay, lesbian, and straight intimate partnerships

    OpenAIRE

    Reczek, Corinne

    2012-01-01

    Health habits are linked to nearly half of U.S. and British deaths annually. While a legacy of research suggests that marriage has important positive consequences for health habits, recent work emphasizes that intimate ties can also deter from healthy habits and promote unhealthy habits. However, few studies examine the mechanisms through which unhealthy habits are promoted in marriage. Moreover, little research explores how unhealthy habits are promoted in intimate ties other than marriage—s...

  18. Anesthesiologists' perceptions of minimum acceptable work habits of nurse anesthetists.

    Science.gov (United States)

    Logvinov, Ilana I; Dexter, Franklin; Hindman, Bradley J; Brull, Sorin J

    2017-05-01

    Work habits are non-technical skills that are an important part of job performance. Although non-technical skills are usually evaluated on a relative basis (i.e., "grading on a curve"), validity of evaluation on an absolute basis (i.e., "minimum passing score") needs to be determined. Survey and observational study. None. None. The theme of "work habits" was assessed using a modification of Dannefer et al.'s 6-item scale, with scores ranging from 1 (lowest performance) to 5 (highest performance). E-mail invitations were sent to all consultant and fellow anesthesiologists at Mayo Clinic in Florida, Arizona, and Minnesota. Because work habits expectations can be generational, the survey was designed for adjustment based on all invited (responding or non-responding) anesthesiologists' year of graduation from residency. The overall mean±standard deviation of the score for anesthesiologists' minimum expectations of nurse anesthetists' work habits was 3.64±0.66 (N=48). Minimum acceptable scores were correlated with the year of graduation from anesthesia residency (linear regression P=0.004). Adjusting for survey non-response using all N=207 anesthesiologists, the mean of the minimum acceptable work habits adjusted for year of graduation was 3.69 (standard error 0.02). The minimum expectations for nurse anesthetists' work habits were compared with observational data obtained from the University of Iowa. Among 8940 individual nurse anesthetist work habits scores, only 2.6% were habits scores were significantly greater than the Mayo estimate (3.69) for the minimum expectations; all Phabits of nurse anesthetists within departments should not be compared with an appropriate minimum score (i.e., of 3.69). Instead, work habits scores should be analyzed based on relative reporting among anesthetists. Copyright © 2017 Elsevier Inc. All rights reserved.

  19. Healthy habits: efficacy of simple advice on weight control based on a habit-formation model.

    Science.gov (United States)

    Lally, P; Chipperfield, A; Wardle, J

    2008-04-01

    To evaluate the efficacy of a simple weight loss intervention, based on principles of habit formation. An exploratory trial in which overweight and obese adults were randomized either to a habit-based intervention condition (with two subgroups given weekly vs monthly weighing; n=33, n=36) or to a waiting-list control condition (n=35) over 8 weeks. Intervention participants were followed up for 8 months. A total of 104 adults (35 men, 69 women) with an average BMI of 30.9 kg m(-2). Intervention participants were given a leaflet containing advice on habit formation and simple recommendations for eating and activity behaviours promoting negative energy balance, together with a self-monitoring checklist. Weight change over 8 weeks in the intervention condition compared with the control condition and weight loss maintenance over 32 weeks in the intervention condition. At 8 weeks, people in the intervention condition had lost significantly more weight (mean=2.0 kg) than those in the control condition (0.4 kg), with no difference between weekly and monthly weighing subgroups. At 32 weeks, those who remained in the study had lost an average of 3.8 kg, with 54% losing 5% or more of their body weight. An intention-to-treat analysis (based on last-observation-carried-forward) reduced this to 2.6 kg, with 26% achieving a 5% weight loss. This easily disseminable, low-cost, simple intervention produced clinically significant weight loss. In limited resource settings it has potential as a tool for obesity management.

  20. Chiral habit selection on nanostructured epitaxial quartz films.

    Science.gov (United States)

    Carretero-Genevrier, Adrián; Gich, Martí; Picas, Laura; Sanchez, Clément; Rodriguez-Carvajal, Juan

    2015-01-01

    Understanding the crystallization of enantiomorphically pure systems can be relevant to diverse fields such as the study of the origins of life or the purification of racemates. Here we report on polycrystalline epitaxial thin films of quartz on Si substrates displaying two distinct types of chiral habits that never coexist in the same film. We combine Atomic Force Microscopy (AFM) analysis and computer-assisted crystallographic calculations to make a detailed study of these habits of quartz. By estimating the surface energies of the observed crystallites we argue that the films are enantiomorphically pure and we briefly outline a possible mechanism to explain the habit and chiral selection in this system.

  1. Sleep and Mental Health in Undergraduate Students with Generally Healthy Sleep Habits

    National Research Council Canada - National Science Library

    Milojevich, Helen M; Lukowski, Angela F

    2016-01-01

    ... quality and mental health in university students with generally healthy sleep habits. Understanding relations between sleep and mental health in individuals with generally healthy sleep habits is important...

  2. Physical activity, nutritional status, and dietary habits of students of a medical university.

    Science.gov (United States)

    Grygiel-Górniak, Bogna; Tomczak, Andrzej; Krulikowska, Natalia; Przysławski, Juliusz; Seraszek-Jaros, Agnieszka; Kaczmarek, Elżbieta

    Nutritional habits and physical activity influence the health status of young adults. In this study, we engaged a group of 151 students from a medical university (90 female and 61 male subjects). Anthropometric parameters, dietary habits (a 7-day dietary recall), and level of physical activity were measured. It was found that the daily food rations of female (F) and male (M) students were improperly balanced and characterized by high amount of total and animal protein, phosphorus, vitamin A, cholesterol, and insufficient intake of carbohydrates, dietary fiber, and vitamin C. Female subjects consumed low amounts of total fat and calcium. The intake of protein (total and animal), fat, phosphorus, and cholesterol correlated with higher body mass. The physical activity of the students was found to be higher than the average physical activity of the European Union populations, and a general tendency of lowering level of physical activity with age was observed. Students with the highest level of physical activity (MET > 1500) consumed lower amounts of simple carbohydrates (galactose and saccharose) when compared to students with lower physical activity (MET < 600, p < 0.05). Therefore, this study concluded that the dietary habits should be modified to prevent the development of diet-dependent diseases. Various forms of physical activity should be proposed to students and they should be encouraged to participate in high level of physical activity so as to promote good health status.

  3. THE HABITABILITY AND DETECTION OF EARTH-LIKE PLANETS ORBITING COOL WHITE DWARFS

    Energy Technology Data Exchange (ETDEWEB)

    Fossati, L.; Haswell, C. A.; Patel, M. R.; Busuttil, R. [Department of Physical Sciences, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); Bagnulo, S. [Armagh Observatory, College Hill, Armagh BT61 9DG (United Kingdom); Kowalski, P. M. [GFZ German Research Centre for Geosciences, Telegrafenberg, D-14473 Potsdam (Germany); Shulyak, D. V. [Institute of Astrophysics, Georg-August-University, Friedrich-Hund-Platz 1, D-37077 Goettingen (Germany); Sterzik, M. F., E-mail: l.fossati@open.ac.uk, E-mail: C.A.Haswell@open.ac.uk, E-mail: M.R.Patel@open.ac.uk, E-mail: r.busuttil@open.ac.uk, E-mail: sba@arm.ac.uk, E-mail: kowalski@gfz-potsdam.de, E-mail: denis.shulyak@gmail.com, E-mail: msterzik@eso.org [European Southern Observatory, Casilla 19001, Santiago 19 (Chile)

    2012-09-20

    Since there are several ways planets can survive the giant phase of the host star, we examine the habitability and detection of planets orbiting white dwarfs. As a white dwarf cools from 6000 K to 4000 K, a planet orbiting at 0.01 AU would remain in the continuous habitable zone (CHZ) for {approx}8 Gyr. We show that photosynthetic processes can be sustained on such planets. The DNA-weighted UV radiation dose for an Earth-like planet in the CHZ is less than the maxima encountered on Earth, and hence non-magnetic white dwarfs are compatible with the persistence of complex life. Polarization due to a terrestrial planet in the CHZ of a cool white dwarf (CWD) is 10{sup 2} (10{sup 4}) times larger than it would be in the habitable zone of a typical M-dwarf (Sun-like star). Polarimetry is thus a viable way to detect close-in rocky planets around white dwarfs. Multi-band polarimetry would also allow us to reveal the presence of a planet atmosphere, providing a first characterization. Planets in the CHZ of a 0.6 M{sub Sun} white dwarf will be distorted by Roche geometry, and a Kepler-11d analog would overfill its Roche lobe. With current facilities a super-Earth-sized atmosphereless planet is detectable with polarimetry around the brightest known CWD. Planned future facilities render smaller planets detectable, in particular by increasing the instrumental sensitivity in the blue.

  4. The Habitable Exoplanet (HabEx) Imaging Mission: Preliminary Science Drivers and Technical Requirements

    Science.gov (United States)

    Gaudi, B. Scott; Habitable Exoplanet Imaging Mission Science and Technology Definition Team

    2017-01-01

    HabEx is one of four candidate flagship missions being studied in detail by NASA, to be submitted for consideration to the 2020 Decadal Survey in Astronomy and Astrophysics for possible launch in the 2030s. It will be optimized for direct imaging and spectroscopy of potentially habitable exoplanets, and will also enable a wide range of general astrophysics science. HabEx aims to fully characterize planetary systems around nearby solar-type stars for the first time, including rocky planets, possible water worlds, gas giants, ice giants, and faint circumstellar debris disks. In particular, it will explore our nearest neighbors and search for signs of habitability and biosignatures in the atmospheres of rocky planets in the habitable zones of their parent stars. Such high spatial resolution, high contrast observations require a large (roughly greater than 3.5m), stable, and diffraction-limited optical space telescope. Such a telescope also opens up unique capabilities for studying the formation and evolution of stars and galaxies. We present some preliminary science objectives identified for HabEx by our Science and Technology Definition Team (STDT), together with a first look at the key challenges and design trades ahead.

  5. TRAPPIST-UCDTS: A prototype search for habitable planets transiting ultra-cool stars

    Directory of Open Access Journals (Sweden)

    Magain P.

    2013-04-01

    Full Text Available The ∼1000 nearest ultra-cool stars (spectral type M6 and latter represent a unique opportunity for the search for life outside solar system. Due to their small luminosity, their habitable zone is 30–100 times closer than for the Sun, the corresponding orbital periods ranging from one to a few days. Thanks to this proximity, the transits of a habitable planet are much more probable and frequent than for an Earth-Sun analog, while their tiny size (∼1 Jupiter radius leads to transits deep enough for a ground-based detection, even for sub-Earth size planets. Furthermore, a habitable planet transiting one of these nearby ultra-cool star would be amenable for a thorough atmospheric characterization, including the detection of possible biosignatures, notably with the near-to-come JWST. Motivated by these reasons, we have set up the concept of a ground-based survey optimized for detecting planets of Earth-size and below transiting the nearest Southern ultra-cool stars. To assess thoroughly the actual potential of this future survey, we are currently conducting a prototype mini-survey using the TRAPPIST robotic 60cm telescope located at La Silla ESO Observatory (Chile. We summarize here the preliminary results of this mini-survey that fully validate our concept.

  6. [Eating habits and subjective well-being among university students in southern Chile].

    Science.gov (United States)

    Schnettler, Berta; Denegri, Marianela; Miranda, Horacio; Sepúlveda, José; Orellana, Ligia; Paiva, Galo; Grunert, Klaus G

    2013-11-01

    To distinguish typologies of university students in southern Chile on the basis of their level of satisfaction with life and food-related life, and to characterize them according to their eating habits inside and outside the place of residence, aspects associated with health and demographic characteristics. A structured questionnaire was applied to a non-probabilistic sample of 347 students at the Universidad de La Frontera, Temuco, Chile. The instruments for collecting information included the SWLS (Satisfaction with Life Scale), SWFL (Satisfaction with Food-related Life) and the HRQOL (Health-related Quality of Life Index). Questions were asked about eating habits inside and outside the place of residence, weight and approximate height, and variables for demographic classification. Using a cluster analysis, three student typologies were distinguished, with significant differences in the SWLS and SWFL scores. The typologies differed in the number of days affected by emotional health problems, classification of their nutritional status (BMI), self-perception of their state of health, importance of food to personal well-being, place of residence during the period of studies, frequency of eating in the place of residence and frequency of meals at inconvenient times. The possibility of living with parents during the period of university studies is associated with better eating habits, better emotional health and self-perception of health, lower prevalence of overweight and obesity, and greater satisfaction with the life and food-related life. Copyright AULA MEDICA EDICIONES 2013. Published by AULA MEDICA. All rights reserved.

  7. Investigating the role of anticipatory reward and habit strength in obsessive-compulsive disorder.

    Science.gov (United States)

    Ferreira, Gabriela M; Yücel, Murat; Dawson, Andrew; Lorenzetti, Valentina; Fontenelle, Leonardo F

    2017-06-01

    Aims To determine the rates and associated illness characteristics of obsessive-compulsive disorder (OCD) patients who describe their symptoms as either rewarding or habitual. Seventy-three treatment-seeking OCD patients had their dominant compulsive behavior assessed with a structured interview (the Temporal Impulsive-Compulsive Scale-Revised) to track the progression of rewarding (ie, gain in positive affect), aversive (ie, decrease in negative affect), and neutral (or non-affective) states and a self-report scale (the Self-Report Habit Index) to evaluate their habitual features. Additional measures included structured diagnostic interviews for axis I and II disorders, measures of OCD symptoms severity, and a battery of instruments to comprehensively assess relevant aspects of sensitivity to reward and fear. Almost half (49%) of our OCD patients (particularly washers) endorsed that they anticipated obtaining a reward (ie, positive affect) from the enactment of their dominant compulsive behavior. Washers stood out in that their positive affects during and after compulsive behaviors were highly (and positively) correlated with duration of illness. In contrast, habit strength did not differ between washers, checkers, and arrangers, although it also correlated with duration of illness among checkers. Furthermore, the severity of OCD and comorbidity with impulse control disorders predicted up to 35% of the variance in the habit strength of OCD behaviors. Compulsive washing may be more clearly characterized by problems in reward processing. In contrast, duration of checking, severity of OCD, and comorbidity with impulse control disorders shape compulsive behaviors by imparting them with habitual tendencies.

  8. Physical fitness, nutritional habits and daily locomotive action of 12 ...

    African Journals Online (AJOL)

    The overweight and obese child is not physically active, has a sedentary way of ... physical fitness, daily nutritional habits and locomotive behaviour among pupils with .... unhealthy stimulations in terms of food intake when watching television.

  9. GIS Technology: Resource and Habitability Assessment Tool Project

    Data.gov (United States)

    National Aeronautics and Space Administration — This is a one-year project to apply a GIS analysis tool to new orbital data for lunar resource assessment and martian habitability identification.  We used...

  10. Thumb Sucking: Help Your Child Break the Habit

    Science.gov (United States)

    ... finger and pacifier habits. American Academy of Pediatric Dentistry. http://www.aapd.org/publications/brochures. Accessed July 8, 2015. Thumbsucking. American Dental Association. http://www.mouthhealthy.org/en/az-topics/t/thumbsucking. Accessed July 8, 2015. Tseng AG, ...

  11. Assessment of reading habits of national open university of Nigeria ...

    African Journals Online (AJOL)

    NOUN) students. Participants in the study were 500 NOUN students that were randomly selected from Abuja study centre. A well designed questionnaire on reading habits (RHQ), validated by experts in the field was used for data collection.

  12. PHYSICAL ACTIVITY AND EATING HABITS IN UNIVERSITY PROFESSORS: LITERATURE REVIEW

    Directory of Open Access Journals (Sweden)

    Hector Luiz Rodrigues Munaro

    2015-01-01

    Full Text Available Increasingly, university professors engage in academic tasks often stressful and sedentary behaviors, making the practice of physical activity and healthier eating habits. The aim of this study was to review the literature Brazilian studies on physical activity and eating habits of university professors .The search was conducted between March and May 2013, in electronic databases. For the delimitation of the study, was used as descriptors: Physical Activity, University Teachers and Eating Habits. At the end of the article selection process, remaining 06 studies that have been described and discussed in the text. And all of a descriptive nature, with small samples with some robust and consistent methodology. The selected studies, regardless of their qualities, point to the need of this population to engage in more physical activity and healthy eating habits programs

  13. Does a Low-Fat Dairy Habit Boost Parkinson's Risk?

    Science.gov (United States)

    ... html Does a Low-Fat Dairy Habit Boost Parkinson's Risk? Study showed 3 or more servings daily ... a slight rise in the risk of developing Parkinson's disease. Experts who reviewed the study stressed that ...

  14. PHYSICAL ACTIVITY AND EATING HABITS IN UNIVERSITY PROFESSORS: LITERATURE REVIEW

    Directory of Open Access Journals (Sweden)

    Hector Luiz Rodrigues Munaro

    2015-03-01

    Full Text Available Increasingly, university professors engage in academic tasks often stressful and sedentary behaviors, making the practice of physical activity and healthier eating habits. The aim of this study was to review the literature Brazilian studies on physical activity and eating habits of university professors .The search was conducted between March and May 2013, in electronic databases. For the delimitation of the study, was used as descriptors: Physical Activity, University Teachers and Eating Habits. At the end of the article selection process, remaining 06 studies that have been described and discussed in the text. And all of a descriptive nature, with small samples with some robust and consistent methodology. The selected studies, regardless of their qualities, point to the need of this population to engage in more physical activity and healthy eating habits programs.

  15. Problems of harmful habits and dependences of students.

    Directory of Open Access Journals (Sweden)

    Gorobey Nikolaj Petrovich

    2011-11-01

    Full Text Available The analysis of data of modern scientific literature is conducted on issue of harmful habits and dependences of students. It is shown that considerable part of student young people have harmful habits and dependences. Negative influence of harmful habits and dependences of students is exposed on the state of their health. Importance of delivering is well-proven from addiction behavior in practice of healthy way of life of students. It is set that one of foreground jobs of present time there is an increase of level of education of student young people on questions abandonment from harmful habits and dependences. The ways of decision of problem of addiction behavior of students are offered as an effective condition of improvement of the state of their health.

  16. The Food and nesting Habits of the Bald Eagle

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report summarizes the observations of the author who watched a bald eagle and studied its food habits at two nests. At the time of the report, the bald eagle...

  17. Nutrition habits in 24-hour mountain bike racers

    National Research Council Canada - National Science Library

    Chlíbková, Daniela; Knechtle, Beat; Rosemann, Thomas; Tomášková, Ivana; Chadim, Vlastimil; Shortall, Marcus

    2014-01-01

    We investigated seventy-four ultra-mountain bikers (MTBers) competing in the solo category in the first descriptive field study to detail nutrition habits and the most common food before during and...

  18. Healthy lifestyle habits and mortality in overweight and obese individuals

    National Research Council Canada - National Science Library

    Matheson, Eric M; King, Dana E; Everett, Charles J

    2012-01-01

    Though the benefits of healthy lifestyle choices are well-established among the general population, less is known about how developing and adhering to healthy lifestyle habits benefits obese versus...

  19. Changing eating habits in Ireland and the Scottish Highlands

    National Research Council Canada - National Science Library

    POUSSOU, Jean-Pierre

    2015-01-01

    .... Secondly, when eating habits began to change, principally in the 17th century, this was not marked by increased use of cereals, but by the predominant role of the potato, at least for the majority of the population...

  20. Artificial Selection for Determinate Growth Habit in Soybean

    Science.gov (United States)

    Determinacy is an agronomically important trait associated with the domestication in soybean (Glycine max). Most soybean cultivars are classifiable into indeterminate and determinate growth habit, while Glycine soja, the wild progenitor of soybean, is indeterminate. Indeterminate (Dt1) and determina...

  1. NMDA Receptors in Dopaminergic Neurons are Crucial for Habit Learning

    Science.gov (United States)

    Wang, Lei Phillip; Li, Fei; Wang, Dong; Xie, Kun; Wang, Deheng; Shen, Xiaoming; Tsien, Joe Z.

    2011-01-01

    Summary Dopamine is crucial for habit learning. Activities of midbrain dopaminergic neurons are regulated by the cortical and subcortical signals among which glutamatergic afferents provide excitatory inputs. Cognitive implications of glutamatergic afferents in regulating and engaging dopamine signals during habit learning however remain unclear. Here we show that mice with dopaminergic neuron-specific NMDAR1 deletion are impaired in a variety of habit learning tasks while normal in some other dopamine-modulated functions such as locomotor activities, goal directed learning, and spatial reference memories. In vivo neural recording revealed that DA neurons in these mutant mice could still develop the cue-reward association responses, but their conditioned response robustness was drastically blunted. Our results suggest that integration of glutamatergic inputs to DA neurons by NMDA receptors, likely by regulating associative activity patterns, is a crucial part of the cellular mechanism underpinning habit learning. PMID:22196339

  2. Downstream Processability of Crystal Habit-Modified Active Pharmaceutical Ingredient

    DEFF Research Database (Denmark)

    Pudasaini, Nawin; Upadhyay, Pratik Pankaj; Parker, Christian Richard

    2017-01-01

    of six representative crystal habits of 5-ASA (needles, plates, rectangular bars, rhombohedrals, elongated hexagons, and spheroids) in the context of direct compression using ring shear tester, flow rate analyzer, and instrumented tablet press. As expected, needles were very cohesive, had low flow rate...... and tabletability, creating significant processability difficulties on a production scale. However, such a habit can be adapted to the needs of downstream processing. To this end, we modified the needle-like crystal habit of the model API 5-aminosalicylic acid (5-ASA). This study reports processability assessment...... (1.0 ± 0.08 mg/s), and low bulk density (0.14 ± 0.01 g/mL) but showed better tabletability, whereas the opposite was observed with more isotropic crystal habits. For instance, spheroids, elongated hexagons, and rhombohedrals were easy/free-flowing and had high bulk densities (≥0.5 g/mL), but final...

  3. [Evolution of knowledge and oral hygiene habits in primary schoolchildren].

    Science.gov (United States)

    Iglesias Guerra, José Antonio; Fernández Calvo, María Teresa; Barrón Sinde, Julio; Bartolomé Lozano, María

    2013-01-01

    To analyze the evolution of knowledge and habits to oral hygiene children and adolescents in Palencia (Spain). A descriptive study of trend. The population of students from grade 5 of primary education between 2001/11 of the Palencia. Questionnaire data are collected knowledge and habits of the Oral Health Program, which are analyzed descriptively. The trend has been improving knowledge until 2006/07, after stagnating (p <0.05). In habits, increase students declare brushing teeth three times a day (p <0.05). There is a decrease in the consumption of candies between hours from 2004/2005, from 50,3% to 38,2% in 2010/11. The results of the program seem to be positive. Increasing knowledge and improving habits related to oral health health they stimulate to continuing being employed at this line. Copyright © 2012 SESPAS. Published by Elsevier Espana. All rights reserved.

  4. Relationship between sleep habits, anthropometric characteristics and lifestyle habits in adolescents with intellectual disabilities.

    Science.gov (United States)

    Vanhelst, J; Bui-Xuan, G; Fardy, P S; Mikulovic, J

    2013-09-01

    The aim was to explore the relationship between sleep habits and overweight/obesity, physical activity and sedentary behaviours in French adolescents with intellectual disabilities. This observational study was conducted on 535 French adolescents with intellectual deficiency. Sleep habits were analyzed and related to anthropometric measures, physical activity and sedentary behaviours. The study was conducted using a self-administered questionnaire. Adolescents completed the questionnaire during an interview with the principle investigator. Sleep timing behaviour was classified into 4 sleep patterns: Early-bed/Early-rise, Early-bed/Late-rise, Late-bed/Late-rise, and Late-bed/Early-rise. Of 573 eligible participants, 125 were excluded because of missing data on age, weight or height. The number of participants identified in each of the four sleep patterns was as follows: Early-bed/Early-rise, N=59 (15.4%), Early-bed/Late-rise, N=164 (43%), Late-bed/Early-rise, N=56 (15%), Late-bed/Late-rise N=102 (27%). Adolescents who woke up early were more active than those from the late rise group (padolescents who are sedentary was higher in late rise vs. early rise subjects (psleep behaviour was associated with overweight/obesity, physical activity and sedentary behaviour in adolescents with intellectual deficiency. Sleep behaviours should be considered in planning health promotion strategies. Copyright © 2013 Elsevier Ltd. All rights reserved.

  5. What makes a planet habitable, and how to search for habitable planets in other solar systems.

    Science.gov (United States)

    Papagiannis, M D

    1992-06-01

    The availability of liquid water is the most important factor that makes a planet habitable, because water is a very effective polar molecule and hence an excellent solvent and facilitator for the complex chemistry of life. Its presence presupposes a planet with a significant mass that guarantees the presence of a substantial atmosphere, and a reasonable spinning rate to avoid overheating. It also implies that the planet is at moderate distances from its central star, a range that is called the Ecosphere or the Habitable Zone. Since the evolution of life to high intelligence seems to take billions of years, it requires also that the central star must be neither too massive, that will produce a lot of lethal UV radiation and will have too short a life-span to allow life to evolve, nor of very small mass which will be producing too feeble a radiation to sustain life. The detection of free Oxygen in the atmosphere of a planet is a very strong evidence for the presence of life, because Oxygen is highly reactive and would rapidly disappear by combining with other elements, unless it is continuously replenished by life as the by-product of the process of photosynthesis that builds food for life (sugars) from CO2 and H2O.

  6. Amateur and professional football player to investigate of nutritional habits

    OpenAIRE

    Saygın, Ozcan; Göral, Kemal; Gelen, Ertugrul

    2009-01-01

    This study was carried out in order to investigate the nutritional habits level of footballers, considering the different league categories. From Turkey Super League, 2. League category A, 2.League category B, 3.League, 1.Amateur League, 2.Amateur League teams 360 active football players participated in the survey. To determine their the survey form developed by the researcher, benefiting previous scientific studies, consisting of 13 personal information questions, 20 nutritional habits quest...

  7. A genealogical map of the concept of habit

    OpenAIRE

    Barandiaran, Xabier E.; Ezequiel Alejandro Di Paolo

    2014-01-01

    The notion of information processing has dominated the study of the mind for over six decades. However, before the advent of cognitivism, one of the most prominent theoretical ideas was that of Habit. This is a concept with a rich and complex history, which is again starting to awaken interest, following recent embodied, enactive critiques of computationalist frameworks. We offer here a very brief history of the concept of habit in the form of a genealogical network-map. This serves to provi...

  8. Television-viewing habits and sleep disturbance in school children.

    Science.gov (United States)

    Owens, J; Maxim, R; McGuinn, M; Nobile, C; Msall, M; Alario, A

    1999-09-01

    To investigate the relationship between specific television-viewing habits and both sleep habits and sleep disturbances in school children. The parents of 495 children in grades kindergarten through fourth grade in three public elementary schools completed two retrospective survey questionnaires, one assessing their children's sleep behaviors and the other examining television-viewing habits of both the child and the family. Sleep domains assessed included bedtime resistance, sleep onset delay, sleep duration, anxiety around sleep, parasomnias, night wakings, and daytime sleepiness. Teachers from all three schools also completed daytime sleepiness questionnaires (N = 402) for the sample. Most of the television-viewing practices examined in this study were associated with at least one type of sleep disturbance. Despite overall close monitoring of television-viewing habits, one quarter of the parents reported the presence of a television set in the child's bedroom. The television-viewing habits associated most significantly with sleep disturbance were increased daily television viewing amounts and increased television viewing at bedtime, especially in the context of having a television set in the child's bedroom. The sleep domains that appeared to be affected most consistently by television were bedtime resistance, sleep onset delay, and anxiety around sleep, followed by shortened sleep duration. The parent's threshold for defining "problem sleep behavior" in their child was also important in determining the significance of the association between sleep disturbance and television-viewing habits. Health care practitioners should be aware of the potential negative impact of television viewing at bedtime. Parents should be questioned about their children's television-viewing habits as part of general screening for sleep disturbances and as part of anticipatory guidance in regards to healthy sleep habits in children. In particular, the presence of a television set in the

  9. Preschool teacher's role in helping preschoolers develop healthy eating habits

    OpenAIRE

    Pellis, Mateja

    2016-01-01

    This thesis focuses on the preschool teacher's role in helping preschoolers develop healthy eating habits. An attempt was made to determine her or his attitude toward the principle of choice and diversity, the principle of equal opportunities and recognizing diversity among children, as well as the principle of multiculturalism. The theoretical sections deal with the criteria of healthy nutrition in the preschool period and the forming of eating habits in early childhood – these manifest ...

  10. Eating attitudes anda habits on adolescents in the Pilsen region

    OpenAIRE

    CÍROVÁ, Vanda

    2016-01-01

    This bachelor thesis deals with the eating habits of pupils at elementary schools and of the third-year students of high school. The theoretical part deals with the definition of teenagers and adolescents eating habits and attitudes, the principles of a healthy diet, fluid intake, the most common eating disorders, metabolic disorders and obesity. The practical part contains the research carried out at selected elementary and secondary schools. Results are compared by gender, education level a...

  11. Diet Habits of Physical Education Students in Chukyo University

    OpenAIRE

    増岡, 和美; 湯浅, 景元; Kazumi, MASUOKA; Kagemoto, YUASA; 愛知みずほ大学; Aichi Mizuho College

    1994-01-01

    Diet habits of physical education students were questionnaired. The subjects were four hunderd sixty-three male and 198 female students of the school of physical eduation in Chukyo University. The questionnare was consisted of the three principal parts : 1) eating habits, 2) diet profile, and 3) eating consciousness. The results obtained from this study were summarized as follows : 1. For the half of the number of male students, the frequency of meals a day was less than three. 2. For both ma...

  12. A Consumption Habit of Street Foods Among Children

    OpenAIRE

    Febry, Fatmalina

    2010-01-01

    A consumption habit of street foods among children have become a general habit in all level of socio-economic level in society. Steet foods generally do not fulfill a health standard and have more risk to contain chemical or biological substances. On the other hand, street food also benefits for children' nutritions if they choose healthy and proper foods. Therefore, roles of parents and teachers in school is necessary to deliver correct knowledge about healthy and nutritious street food to...

  13. Paternal smoking habits affect the reproductive life span of daughters.

    Science.gov (United States)

    Fukuda, Misao; Fukuda, Kiyomi; Shimizu, Takashi; Nobunaga, Miho; Andersen, Elisabeth Wreford; Byskov, Anne Grete; Andersen, Claus Yding

    2011-06-30

    The present study assessed whether the smoking habits of fathers around the time of conception affected the period in which daughters experienced menstrual cycles (i.e., the reproductive life span). The study revealed that the smoking habits of the farther shortened the daughters' reproductive life span compared with daughters whose fathers did not smoke. Copyright © 2011 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.

  14. Habits: bridging the gap between personhood and personal identity

    Science.gov (United States)

    Wagner, Nils-Frederic; Northoff, Georg

    2014-01-01

    In philosophy, the criteria for personhood (PH) at a specific point in time (synchronic), and the necessary and sufficient conditions of personal identity (PI) over time (diachronic) are traditionally separated. Hence, the transition between both timescales of a person's life remains largely unclear. Personal habits reflect a decision-making (DM) process that binds together synchronic and diachronic timescales. Despite the fact that the actualization of habits takes place synchronically, they presuppose, for the possibility of their generation, time in a diachronic sense. The acquisition of habits therefore rests upon PI over time; that is, the temporal extension of personal decisions is the necessary condition for the possible development of habits. Conceptually, habits can thus be seen as a bridge between synchronic and diachronic timescales of a person's life. In order to investigate the empirical mediation of this temporal linkage, we draw upon the neuronal mechanisms underlying DM; in particular on the distinction between internally and externally guided DM. Externally guided DM relies on external criteria at a specific point in time (synchronic); on a neural level, this has been associated with lateral frontal and parietal brain regions. In contrast, internally guided DM is based on the person's own preferences that involve a more longitudinal and thus diachronic timescale, which has been associated with the brain's intrinsic activity. Habits can be considered to reflect a balance between internally and externally guided DM, which implicates a particular temporal balance between diachronic and synchronic elements, thus linking two different timescales. Based on such evidence, we suggest a habit-based neurophilosophical approach of PH and PI by focusing on the empirically-based linkage between the synchronic and diachronic elements of habits. By doing so, we propose to link together what philosophically has been described and analyzed separately as PH and PI

  15. READING AND LEISURE TIMES ACTIVITY HABITS OF PRESERVICE TEACHERS

    OpenAIRE

    Tahir Gür

    2014-01-01

    Reading has an undeniable importance in human life. The reading habits of teachers who educate future generations are extremely important in their education as weel as in their professional lives. In this study, we aimed to determine preservice teachers' reading habits, leisure time activities and reading motivations. In this context, reading was taken in a broader sense that includes reading of new technological materials and environments besides traditional materials. According to the...

  16. The reading habits of parents of preschool children

    OpenAIRE

    Jalovec, Alenka

    2011-01-01

    The reading habits of parents of preschool children are very important for development of reading literacy. The role of parents in reading is very high. It is important that parents often read for themselves and for their children regardless of age, sex and education. With reading they are giving the children an example and attach great importance to reading. An important factor is the frequency of library visits and dealing with books. On the reading habits of parents have important influenc...

  17. Titania may produce abiotic oxygen atmospheres on habitable exoplanets

    OpenAIRE

    Norio Narita; Takafumi Enomoto; Shigeyuki Masaoka; Nobuhiko Kusakabe

    2015-01-01

    The search for habitable exoplanets in the Universe is actively ongoing in the field of astronomy. The biggest future milestone is to determine whether life exists on such habitable exoplanets. In that context, oxygen in the atmosphere has been considered strong evidence for the presence of photosynthetic organisms. In this paper, we show that a previously unconsidered photochemical mechanism by titanium (IV) oxide (titania) can produce abiotic oxygen from liquid water under near ultraviolet ...

  18. Technology Maturity for the Habitable-zone Exoplanet Imaging Mission (HabEx) Concept

    Science.gov (United States)

    Morgan, Rhonda; Warfield, Keith R.; Stahl, H. Philip; Mennesson, Bertrand; Nikzad, Shouleh; nissen, joel; Balasubramanian, Kunjithapatham; Krist, John; Mawet, Dimitri; Stapelfeldt, Karl; warwick, Steve

    2018-01-01

    HabEx Architecture A is a 4m unobscured telescope optimized for direct imaging and spectroscopy of potentially habitable exoplanets, and also enables a wide range of general astrophysics science. The exoplanet detection and characterization drives the enabling core technologies. A hybrid starlight suppression approach of a starshade and coronagraph diversifies technology maturation risk. In this poster we assess these exoplanet-driven technologies, including elements of coronagraphs, starshades, mirrors, jitter mitigation, wavefront control, and detectors. By utilizing high technology readiness solutions where feasible, and identifying required technology development that can begin early, HabEx will be well positioned for assessment by the community in 2020 Astrophysics Decadal Survey.

  19. Habit predicts in-the-moment alcohol consumption.

    Science.gov (United States)

    Albery, Ian P; Collins, Isabelle; Moss, Antony C; Frings, Daniel; Spada, Marcantonio M

    2015-02-01

    The objective of this study was to examine whether habit predicts in-the-moment behavioural intention (amount of alcohol poured) and behavioural enactment (amount and proportion of alcohol consumed) controlling for craving and positive alcohol expectancies. Forty-six college students, who defined themselves as social drinkers, were tested individually in a laboratory setting. After completing a measure of craving they were given a bottle of non-alcoholic beer and a cup, asked to pour a drink, and then drink as much as they liked. They were not informed that the beer was non-alcoholic. They were subsequently asked to complete measures of alcohol use and misuse, positive alcohol expectancies and habit. Positive alcohol expectancies were positively and significantly associated with the amount of alcohol poured and the amount and proportion of alcohol consumed. Habit was positively and significantly associated with the amount and proportion of alcohol consumed but not with the amount of alcohol poured. Hierarchical regression analyses revealed that only habit was a significant predictor of both the amount and proportion of alcohol consumed. Even though measures of intention (amount of alcohol poured) and behaviour (amount and proportion of alcohol consumed) were positively correlated, habit was shown to effectively discriminate between these measures. These findings suggest that habit predicts in-the-moment behavioural enactment in terms of the amount and proportion of alcohol consumed. Copyright © 2014 Elsevier Ltd. All rights reserved.

  20. A student research review of the mouthbreathing habit: discussing measurement methods, manifestations and treatment of the mouthbreathing habit.

    Science.gov (United States)

    Stokes, N; Della Mattia, D

    1996-01-01

    Mouthbreathing as an oral habit is seldom discussed in detail and as a consequence has tended to be overlooked by dental professionals. This review paper is an in-depth look at the current research on the mouthbreathing habit. This report aims to inform the dental professional of the most current definition of mouthbreathing and the methods of measuring the habit, including both observational and quantitative techniques. The various factors that can cause a mouthbreathing habit, such as asthma, allergies and enlarged glandular tissue, are discussed in detail. A review of current data on the skeleto-facial, dental and gingival changes that occur in mouthbreathing individuals is given, with the intention of raising the awareness of dental professionals to the special needs of these patients.

  1. Building healthy eating habits in childhood: a study of the attitudes, knowledge and dietary habits of schoolchildren in Malaysia

    OpenAIRE

    Kazi Enamul Hoque; Megat Ahmad Kamaluddin; Ahmad Zabidi Abdul Razak; Afiq Athari Abdul Wahid

    2016-01-01

    Background Overweight and obesity have increased rapidly in incidence to become a global issue today. Overweight and obesity problems are significantly linked to unhealthy dietary patterns, physical inactivity and misperception of body image. This study aimed to determine whether Malaysian children build healthy eating habits from childhood. Methods A survey on eating habits was conducted among primary school students in standards 4 to 6 in the state of Selangor, Malaysia. The findings of the...

  2. Smoking habits in secondary school students

    Directory of Open Access Journals (Sweden)

    C. Damas

    2009-01-01

    Full Text Available Background: Smoking is an important health risk in general, and responsible for diseases with significant mortality and morbidity. Smoking habits start early and adolescence is a notorious time for starting smoking. Aim and Methods: To assess knowledge on smoking and smoking habits in a population of adolescents in four Porto schools, using a confidential self administered questionnaire. Collected data were evaluated using the SPSS 1.2 statistics program (2004 version. Results: A total of 1770 students aged 11 - 21 (median 15.1 years, mainly female, (58%, answered. Most students (n=952, 54.6% were unaware of signs or warnings against smoking in their schools. The great majority (n=1639, 92.7% considered themselves well informed on the harmful effects of smoking, but only 6.7% could list three or more tobacco-associated health consequences, however. Parents and friends were seen as privileged sources of information. Among these students, 194 (11.1% were smokers and the average started to smoke at the age of 15. The majority of these (n=111, 57.2% had parents who smoked and 96.4% had friends who smoked, versus 83.1% of non-smokers, a statistically significant difference (p<0.001. Pocket money was the means of acquiring cigarettes in 34.8%. Most (60.8% considered themselves able to stop smoking at any time, while 11.4% of the smokers smoked more than one pack a day and 9.8% smoked the first cigarette within 5 minutes of waking, however. Conclusions: The percentage of smokers in this group of teenagers was considerable and indicators of nicotine dependence were found. Knowledge of the risks of smoking was poor and information on smoking given by schools had an apparently low and variable impact. Parents’ and friends’ behaviour may have a weighty impact on the decision to start smoking. Resumo: Introdução: O consumo de tabaco é um factor de risco importante em doenças com mortalidade e morbilidade importante. O hábito de

  3. Driving habits in patients with dementia: a report from Alzheimer’s disease assessment units in northern Italy

    OpenAIRE

    Mauri, Marco; Sinforiani, Elena; Cuzzoni, Maria Giovanna; Bono, Giorgio; Zucchella, Chiara

    2014-01-01

    The aim of this study was to characterize the driving behavior of a sample of patients with dementia. Demographic and clinical characteristics and parameters considered to be the most significant predictors of driving ability were collected. Of the total 198 patients enrolled, 172 were still driving. Many subjects (30–65%) were found to have modified their driving habits (reducing driving time and mileage, avoiding driving at night and during rush hours, sticking to familiar routes). The pati...

  4. [A longitudinal study on dietary habits and the primary socialization of these habits in young children].

    Science.gov (United States)

    Vereecken, C A

    2010-01-01

    The Family Influences on Food Intake study (FIFI), is a longitudinal study on dietary habits of young children and the primary socialization of these habits during childhood and during the transition into adolescence. Special attention is paid to the development, validation and feasibility of instruments measuring as well dependent as independent variables useful for large scale surveys. Parents of preschool children from the first year (+/-3 years of age) of 56 school departments were asked to complete a self-administered questionnaire biennially. Data of 862 children was available for the first measurement (2008). A web based dietary record tool was developed to investigate the relative validity of the Food Frequency Questionnaire (FFQ) used in the study. Two hundred and seventeen parents completed the online tool for three non-consecutive days. The feasibility of the online data collection is investigated and the reported intake is compared with the FFQ estimates. Associations between nutritional knowledge and attitudes of the children's mothers and dietary patterns of the children (FFQ) are investigated as well as relations between parent and child characteristics and fruit and vegetable intake. Additionally, 70 teachers completed a questionnaire on their attitudes towards the school food policy. The teachers' responses are compared with responses of parents from a previous study. Finally, the feasibility of an animated web based fruit and vegetables preferences tool, to be used in the follow up surveys, has been investigated in 4-6 years old (n=139 for fruit and n=135 for vegetables). The findings are summarized in the present paper.

  5. Anxiety, cognition, and habit: a multiple memory systems perspective.

    Science.gov (United States)

    Packard, Mark G

    2009-10-13

    Consistent with a multiple systems approach to memory organization in the mammalian brain, numerous studies have differentiated the roles of the hippocampus and dorsal striatum in "cognitive" and "habit" learning and memory, respectively. Additional research indicates that activation of efferent projections of the basolateral amygdala (BLA), a brain region implicated in mammalian emotion, modulates memory processes occurring in other brain structures. The present brief review describes research designed to link these general concepts by examining the manner in which emotional state may influence the relative use of multiple memory systems. In a dual-solution plus-maze task that can be acquired using either hippocampus-dependent or dorsal striatal-dependent learning, acute pre-training or pre-retrieval emotional arousal (restraint stress/inescapable foot shock, exposure to the predator odor TMT, or peripheral injection of anixogenic drugs) biases rats towards the use of habit memory. Moreover, intra-BLA injection of anxiogenic drugs is sufficient to bias rats towards the use of dorsal striatal-dependent habit memory. In single-solution plus-maze tasks that require the use of either cognitive or habit learning, intra-BLA infusions of anxiogenic drugs result in a behavioral profile indicating an impairing effect on hippocampus-dependent memory that effectively produces enhanced habit learning by eliminating competitive interference between cognitive and habit memory systems. It is speculated that the predominant use of habit memory that can be produced by anxious and/or stressful emotional states may have implications for understanding the role of learning and memory processes in various human psychopathologies, including for example post-traumatic stress disorder and drug addiction.

  6. Healthy lifestyle habits and mortality in overweight and obese individuals.

    Science.gov (United States)

    Matheson, Eric M; King, Dana E; Everett, Charles J

    2012-01-01

    Though the benefits of healthy lifestyle choices are well-established among the general population, less is known about how developing and adhering to healthy lifestyle habits benefits obese versus normal weight or overweight individuals. The purpose of this study was to determine the association between healthy lifestyle habits (eating 5 or more fruits and vegetables daily, exercising regularly, consuming alcohol in moderation, and not smoking) and mortality in a large, population-based sample stratified by body mass index (BMI). We examined the association between healthy lifestyle habits and mortality in a sample of 11,761 men and women from the National Health and Nutrition Examination Survey III; subjects were ages 21 and older and fell at various points along the BMI scale, from normal weight to obese. Subjects were enrolled between October 1988 and October 1994 and were followed for an average of 170 months. After multivariable adjustment for age, sex, race, education, and marital status, the hazard ratios (95% CIs) for all-cause mortality for individuals who adhered to 0, 1, 2, or 3 healthy habits were 3.27 (2.36-4.54), 2.59 (2.06-3.25), 1.74 (1.51-2.02), and 1.29 (1.09-1.53), respectively, relative to individuals who adhered to all 4 healthy habits. When stratified into normal weight, overweight, and obese groups, all groups benefited from the adoption of healthy habits, with the greatest benefit seen within the obese group. Healthy lifestyle habits are associated with a significant decrease in mortality regardless of baseline body mass index.

  7. Quantitative estimates of the surface habitability of Kepler-452b

    Science.gov (United States)

    Silva, Laura; Vladilo, Giovanni; Murante, Giuseppe; Provenzale, Antonello

    2017-09-01

    Kepler-452b is currently the best example of an Earth-size planet in the habitable zone of a sun-like star, a type of planet whose number of detections is expected to increase in the future. Searching for biosignatures in the supposedly thin atmospheres of these planets is a challenging goal that requires a careful selection of the targets. Under the assumption of a rocky-dominated nature for Kepler-452b, we considered it as a test case to calculate a temperature-dependent habitability index, h050, designed to maximize the potential presence of biosignature-producing activity. The surface temperature has been computed for a broad range of climate factors using a climate model designed for terrestrial-type exoplanets. After fixing the planetary data according to the experimental results, we changed the surface gravity, CO2 abundance, surface pressure, orbital eccentricity, rotation period, axis obliquity and ocean fraction within the range of validity of our model. For most choices of parameters, we find habitable solutions with h050 > 0.2 only for CO2 partial pressure p_CO_2 ≲ 0.04 bar. At this limiting value of CO2 abundance, the planet is still habitable if the total pressure is p ≲ 2 bar. In all cases, the habitability drops for eccentricity e ≳ 0.3. Changes of rotation period and obliquity affect the habitability through their impact on the equator-pole temperature difference rather than on the mean global temperature. We calculated the variation of h050 resulting from the luminosity evolution of the host star for a wide range of input parameters. Only a small combination of parameters yields habitability-weighted lifetimes ≳2 Gyr, sufficiently long to develop atmospheric biosignatures still detectable at the present time.

  8. Habitability of Mars: hyperthermophiles in permafrost

    Science.gov (United States)

    Gilichinsky, David; Rivkina, Elizaveta; Vishnivetskaya, Tatiana; Felipe, Gomez; Mironov, Vasilii; Blamey, Jenny; Ramos, Miguel; Ángel de Pablo, Miguel; Castro, Miguel; Boehmwald, Freddy

    This is a first microbiological study of volcanic permafrost carried out on Kluchevskaya volcano group (Kamchatka Peninsula) and Deception Island (Antarctica). By culture-and culture-independent methods we showed the presence of viable hyper(thermophilic) microorganisms and their genes within volcanic permafrost. The optimal temperature for sulfide producing bacteria was 65, whereas acetogens and methanogens were able to produce acetate and methane at temperatures up to 75o C, while sulphur-reducers showed optimal growth at 85-92o C. Hy-per(thermophiles) were never found in permafrost outside the volcanic areas before. The only way they are to appear within a frozen material is a concurrent deposition during the eruption, together with products associated with volcano heated subsurface geothermal oases. The elo-quent evidence to the hypothesis is the presence among clones of the sequences affiliated with (hyper)thermophilic bacteria, both, aerobic and anaerobic, in the environmental DNA derived from ashes freshly deposited on snow in close proximity to volcano Shiveluch (Kamchatka) and aerobic bacteria incubated at 80o C from ashes freshly deposited on the top of Llaima Vol-cano glacier (Andes). Thus, in the areas of active volcanism the catastrophic geological events transports the life from the depths to the surface and this life from high-temperature ecological niches might survive in permafrost over a long period of time. The results obtained give insights for habitability of Mars. Terrestrial permafrost represents a possible ecosystem for Mars as an Earth-like cryogenic planet. But permafrost on Earth and Mars vary in age, from a few million years on Earth to a few billion years on Mars. Because such difference in age, the longevity of life forms preserved within terrestrial permafrost may only serve as an approximate model for Mars. On the other hand, numerous ancient extinct volcanoes are known on Mars. Their past eruptions periodically burn-through the

  9. Prevalence of temporomandibular disorders and its association with parafunctional habits among senior-secondary school children of Lucknow, India

    Directory of Open Access Journals (Sweden)

    Kriti Agarwal

    2016-01-01

    Full Text Available Introduction: Temporomandibular disorders (TMD are defined as heterogeneous group of psychological disorders, commonly characterized by orofacial pain, chewing dysfunction, or both. Aim: To determine the prevalence of TMD and to describe the association between parafunctional habits and signs and symptoms of TMD among 15–17-year-old school children in Lucknow. Materials and Methods: This study followed a cross-sectional design, with a sample of 407 school children aged 15–17-year-old. A single, trained, calibrated investigator interviewed the participants according to Fonseca's Anamnestic Questionnaire-1994, which provided information on the prevalence of TMD, followed by the clinical examination of temporomandibular joint (TMJ according to WHO (1997. Chi-square test and Univariate and Multivariate Logistic Regression analysis were used. Results: The prevalence of TMD was (22.4%. There was no statistically significant association was found between age, (P = 0.81 gender (P = 0.09 and TMD. Nail-biting (88.3% was the most common habit, followed by clenching/grinding (68.4% and mouth breathing (53.4%. However, habits and TMJ symptoms were found statistically significant P < 0.01 or P < 0.001 associated to TMD. Further, adjusted (age and gender logistic regression analysis revealed that digit-sucking, mouth breathing, nail biting, and clenching has made a significant contribution to prediction (P < 0.001. Conclusion: The habits especially digit-sucking, mouth breathing, nail biting, and clenching had statistically significantly associated with TMD.

  10. Geophysical Limitations on the Habitable Zone: Volcanism and Plate Tectonics

    Science.gov (United States)

    Noack, Lena; Rivoldini, Attilio; Van Hoolst, Tim

    2016-04-01

    Planets are typically classified as potentially life-bearing planets (i.e. habitable planets) if they are rocky planets and if a liquid (e.g. water) could exist at the surface. The latter depends on several factors, like for example the amount of available solar energy, greenhouse effects in the atmosphere and an efficient CO2-cycle. However, the definition of the habitable zone should be updated to include possible geophysical constraints, that could potentially influence the CO2-cycle. Planets like Mars without plate tectonics and no or only limited volcanic events can only be considered to be habitable at the inner boundary of the habitable zone, since the greenhouse effect needed to ensure liquid surface water farther away from the sun is strongly reduced. We investigate if the planet mass as well as the interior structure can set constraints on the occurrence of plate tectonics and outgassing, and therefore affect the habitable zone, using both parameterized evolution models [1] and mantle convection simulations [1,2]. We find that plate tectonics, if it occurs, always leads to sufficient volcanic outgassing and therefore greenhouse effect needed for the outer boundary of the habitable zone (several tens of bar CO2), see also [3]. One-plate planets, however, may suffer strong volcanic limitations. The existence of a dense-enough CO2 atmosphere allowing for the carbon-silicate cycle and release of carbon at the outer boundary of the habitable zone may be strongly limited for planets: 1) without plate tectonics, 2) with a large planet mass, and/or 3) a high iron content. Acknowledgements This work has been funded by the Interuniversity Attraction Poles Programme initiated by the Belgian Science Policy Office through the Planet Topers alliance, and results within the collaboration of the COST Action TD 1308. References Noack, L., Rivoldini, A., and Van Hoolst, T.: CHIC - Coupling Habitability, Interior and Crust, INFOCOMP 2015, ISSN 2308-3484, ISBN 978

  11. The influence of family structure on breakfast habits among adolescents.

    Science.gov (United States)

    Jørgensen, Astrid; Pedersen, Trine Pagh; Meilstrup, Charlotte Riebeling; Rasmussen, Mette

    2011-05-01

    Regular breakfast habits are important for the health and well-being of young people. The family is an important setting for developing regular breakfast habits. The objectives of the present study are to study the association between family structure and the regularity of breakfast habits among children and adolescents, and to analyse whether such potential association is modified by gender. Data are from the Danish contribution to the international study entitled Health Behaviour in School aged Children, 2006. Participants are school children aged 11, 13 and 15 drawn from a random sample of Danish schools. The response rate was 88.8%, n = 6,269. Family structure was categorized into traditional family, single-parent family and reconstructed family. Irregular breakfast habits (IBH) were defined as having breakfast 0-1 times per week. Analyses of the total population show an increased, significant odds ratio (OR) of 1.56 for IBH among children from single-parent families. Among children from reconstructed families, an insignificant OR of 1.27 was observed. Further, the results suggest that girls living in a reconstructed family may also have an increased risk of IBH. The breakfast habits of adolescent boys and girls are influenced by family structure.

  12. Dental hygiene habits and oral health status of seafarers.

    Science.gov (United States)

    Mahdi, Syed Sarosh; Sibilio, Fabio; Amenta, Francesco

    2016-01-01

    This study has assessed the dental hygiene habits and problems of seafarers and their attitudes/ perceptions regarding oral hygiene using a dental hygiene/habits questionnaire. A research questionnaire on oral hygiene habits was prepared along with a summary of all the questions and sent to ships via e-mail by Centro Internazionale Radio Medico (CIRM) networks. CIRM, is the Italian Telemedical Maritime Assistance Service (TMAS), and represents the Centre with the largest number of seafarers assisted on board ships worldwide. CIRM proposed the questionnaire to all ships (n = 1,198) asking for medical advice from 1 July 2014 till 31 October 2014. Two dental professionals were involved in the development and analysis of the questionnaire. Seafarers are at risk of several dental health problems due to their oral hygiene and dietary habits, smoking and alcohol consumption, poor oral hygiene knowledge and motivation. Dietary habits during voyages were also questionable and seafarers consume food rich in fermentable carbohydrates, which is a major risk factor for dental caries. Seafarers need better oral hygiene education and care to enable them to manage their oral health in a better way. Life at the sea, under challenging circumstances is not without stress, that is why it is important that seafarers are given complete information about correct oral hygiene protocols and dental hygiene and the advantages for their health of keeping a healthy mouth.

  13. Relationships between eating habits and periodontal condition in university students.

    Science.gov (United States)

    Tomofuji, Takaaki; Furuta, Michiko; Ekuni, Daisuke; Irie, Koichiro; Azuma, Tetsuji; Iwasaki, Yoshiaki; Morita, Manabu

    2011-12-01

    Being overweight is a risk factor for periodontitis. Unhealthy eating habits, which can induce overweight, may be involved in the development of periodontitis in young people. The present study aims to examine the relationships among overweight, eating habits, and the periodontal condition in Japanese university students. We conducted a cross-sectional study of 801 university students (413 males and 388 females; age range: 18 to 25 years). Patients were classified as underweight (body mass index [BMI] Students completed a questionnaire including items related to eating habits and underwent oral health examinations. Patients with a community periodontal index (CPI) of 0 to 2 were considered controls, and patients with a CPI >2 were considered to have periodontitis. The prevalence of underweight, normal weight, and overweight patients was 21%, 62%, and 17%, respectively. In overweight patients, the periodontitis risk was increased by the frequent consumption of fatty foods (adjusted odds ratio: 2.3; 95% confidence interval: 1.1 to 5.2; P eating habits did not differ significantly according to the presence of periodontitis. In overweight students, the frequent consumption of fatty foods and infrequent consumption of vegetables were associated with an increased risk of periodontitis. In underweight and normal-weight students, eating habits had little effect on the periodontal condition.

  14. An investigation of habit learning in Anorexia Nervosa.

    Science.gov (United States)

    Godier, Lauren R; de Wit, Sanne; Pinto, Anthony; Steinglass, Joanna E; Greene, Ashley L; Scaife, Jessica; Gillan, Claire M; Walsh, B Timothy; Simpson, Helen-Blair; Park, Rebecca J

    2016-10-30

    Anorexia Nervosa (AN) is a disorder characterised by compulsive behaviour, such as self-starvation and excessive exercise, which develop in the pursuit of weight-loss. Recent theory suggests that once established, compulsive weight-loss behaviours in AN may become habitual. In two parallel studies, we measured whether individuals with AN showed a bias toward habits using two outcome-devaluation tasks. In Study 1, 23 women with AN (restrictive and binge/purge subtypes), and 18 healthy controls (HC) completed the slips-of-action paradigm, designed to assess reward-based habits. In Study 2, 13 women with restrictive AN, 14 women recovered from restrictive AN, and 17 female HC participants completed the slips-of-action paradigm, and an avoidance paradigm, designed to assess aversive habits. AN participants showed no deficit relative to HCs in the ability to use feedback to respond correctly to stimuli. Following devaluation of outcomes, all groups in both studies were equally able to withhold inappropriate responses, suggesting no deficit in the balance between goal-directed and habitual control of behaviour in these tasks in AN. These results suggest that individuals with AN do not show a generalised tendency to rely on habits in two outcome-devaluation tasks. Future research is needed to investigate the potential role of disorder-specific habits in the maintenance of behaviour in AN. Copyright © 2016. Published by Elsevier Ireland Ltd.

  15. Selected nutritional habits of teenagers associated with overweight and obesity.

    Science.gov (United States)

    Zalewska, Magdalena; Maciorkowska, Elżbieta

    2017-01-01

    A balanced diet is at the heart of healthy growth and development of children and youth, whereas inappropriate eating habits considerably influence the incidence of disorders connected with nutrition, including overweight and obesity. This paper aims at studying nutritional factors of 18-year-old secondary school youth in the urban environment and their effect on the incidence of overweight and obesity. The survey was conducted among 1,999 secondary school students chosen at random. The research tool consisted an original survey questionnaire. The measurements of respondents' height and body mass provided data for calculating the body mass index. The percentage of youth with deficient body mass was estimated at 8.4%. The percentage of normal weight students in the surveyed group was estimated at 77.6%. Overweight and obesity characterized 14.0% of the total number. As many as 21.8% of overweight and obese respondents would eat one or two meals as opposed to 16.8% of normal weight students. Three-fourths of the surveyed students would eat breakfast regardless of their nutritional habits. Lunch is eaten by 52.9% of normal weight 18-year-olds and 46.1% of overweight and obese students. The analysis of mealtimes suggests that overweight and obese students would have their breakfast and dinner at later hours than the rest of the surveyed. More than half of the participating students failed to eat lunch (53.9%), and one in four students within this group resigned from supper. Girls would eat fruit and vegetables more frequently than boys several times a day. The percentage of persons in the surveyed groups who would eat fast foods on a daily basis was similar regardless of their nutritional status. Sweetened carbonated beverages would be drunk more often by overweight and obese boys (81.2%) as compared with boys with proper body mass (75.8%). The same type of beverages would be popular with two-thirds of girls, and this result was similar regardless of their nutritional

  16. On the habitability of a stagnant-lid Earth

    Science.gov (United States)

    Tosi, Nicola; Stracke, Barbara; Godolt, Mareike; Ruedas, Thomas; Grenfell, John Lee; Höning, Dennis; Nikolaou, Athanasia; Plesa, Ana-Catalina; Breuer, Doris; Spohn, Tilman

    2016-04-01

    Whether plate tectonics is a recurrent feature of terrestrial bodies orbiting other stars or is unique to the Earth is unknown. The stagnant-lid may rather be the most common tectonic mode through which terrestrial bodies operate. Here we model the thermal history of the mantle, the outgassing evolution of H2O and CO2, and the resulting climate of a hypothetical planet with the same mass, radius, and composition as the Earth, but lacking plate tectonics. We employ a 1-D model of parameterized stagnant-lid convection to simulate the evolution of melt generation, crust production, and volatile extraction over a timespan of 4.5 Gyr, focusing on the effects of three key mantle parameters: the initial temperature, which controls the overall volume of partial melt produced; the initial water content, which affects the mantle rheology and solidus temperature; and the oxygen fugacity, which is employed in a model of redox melting to determine the amount of carbon stored in partial melts. We assume that the planet lost its primordial atmosphere and use the H2O and CO2 outgassed from the interior to build up a secondary atmosphere over time. Furthermore, we assume that the planet may possess an Earth-like ocean. We calculate the atmospheric pressure based on the solubility of H2O and CO2 in basaltic magmas at the evolving surface pressure conditions. We then employ a 1-D radiative-convective, cloud-free stationary atmospheric model to calculate the resulting atmospheric temperature, pressure and water content, and the corresponding boundaries of the habitable zone (HZ) accounting for the evolution of the Sun's luminosity with time but neglecting escape processes. The interior evolution is characterized by a large initial production of partial melt accompanied by the formation of crust that rapidly grows until its thickness matches that of the stagnant lid so that the convecting sublithospheric mantle prevents further crustal growth. Even for initial water concentrations in

  17. Oceanus: A New Frontiers orbiter to study Titan's potential habitability

    Science.gov (United States)

    Sotin, Christophe; Hayes, Alex; Malaska, Michael; Nimmo, Francis; Trainer, Melissa; Tortora, Paolo

    2017-04-01

    The New Frontiers 4 AO includes the theme "Ocean Worlds (Titan and/or Enceladus)" focused on the search for signs of extant life and/or characterizing the potential habitability of Titan and/or Enceladus. The Cassini has demonstrated that Titan is an organic world of two oceans: surface hydrocarbon seas [1,2] that cover part of the north polar region and a deep water ocean [3] that decouples the outer ice crust from an inner core likely composed of hydrated silicates [4]. Oceanus is an orbiter that would follow up on Cassini's amazing discoveries and assess Titan's habitability by following the organics through the methanologic cycle and assessing ex-change processes between the atmosphere, surface, and subsurface. Titan's reduced nitrogen-rich atmosphere operates as an organic factory [5] where heavy organic molecules are produced by a series of reations starting by the photolysis of methane [6,7]. The mass spectrometer will perform high-resolution in situ measurements of the organic material over a large mass range and at different altitudes. It will provide the information required to determine (i) the processes at work to form the heavy molecules, (ii) the functional group pattern of large molecules providing information on their composition. These organics coat Titan's surface and are moved around through a complex source-to-sink sediment transport system analogous to surface processes here on Earth. Titan's 90-95 K surface temperature at 1.5 bar surface pressure permit me-thane and ethane to condense out of the atmosphere and flow as liquids on the surface. As a result, Titan's methane-based hydrologic system produces a rich set of geologic features (dunes, river net-works, polar lakes/seas, etc.). Cassini's observations of this rich geomorphology is hindered by kilometer-scale resolution. Oceanus will take ad-vantage of a narrow atmospheric window at 5 µm to acquire 25 m/pixel (< 100 m resolution) images of Titan diverse surface [8]. The presence of 40Ar, a

  18. Selected nutritional habits of teenagers associated with overweight and obesity

    Directory of Open Access Journals (Sweden)

    Magdalena Zalewska

    2017-09-01

    Full Text Available Introduction A balanced diet is at the heart of healthy growth and development of children and youth, whereas inappropriate eating habits considerably influence the incidence of disorders connected with nutrition, including overweight and obesity. This paper aims at studying nutritional factors of 18-year-old secondary school youth in the urban environment and their effect on the incidence of overweight and obesity. Materials and methods The survey was conducted among 1,999 secondary school students chosen at random. The research tool consisted an original survey questionnaire. The measurements of respondents’ height and body mass provided data for calculating the body mass index. Results and conclusion The percentage of youth with deficient body mass was estimated at 8.4%. The percentage of normal weight students in the surveyed group was estimated at 77.6%. Overweight and obesity characterized 14.0% of the total number. As many as 21.8% of overweight and obese respondents would eat one or two meals as opposed to 16.8% of normal weight students. Three-fourths of the surveyed students would eat breakfast regardless of their nutritional habits. Lunch is eaten by 52.9% of normal weight 18-year-olds and 46.1% of overweight and obese students. The analysis of mealtimes suggests that overweight and obese students would have their breakfast and dinner at later hours than the rest of the surveyed. More than half of the participating students failed to eat lunch (53.9%, and one in four students within this group resigned from supper. Girls would eat fruit and vegetables more frequently than boys several times a day. The percentage of persons in the surveyed groups who would eat fast foods on a daily basis was similar regardless of their nutritional status. Sweetened carbonated beverages would be drunk more often by overweight and obese boys (81.2% as compared with boys with proper body mass (75.8%. The same type of beverages would be popular with two

  19. Sociodemographic differences in dietary habits described by food frequency questions

    DEFF Research Database (Denmark)

    Dynesen, Anja Weirsøe; Haraldsdottír, Johanna; Holm, Lotte

    2003-01-01

    OBJECTIVES: To investigate whether a modest number of food frequency questions are sufficient to describe sociodemographic differences in dietary habits, and to identify sociodemographic characteristics of subjects adhering to food-based dietary guidelines operationalised in a "healthy-diet index...... household vs single household). The results also showed that gender difference in dietary habits is associated with other sociodemographic variables. CONCLUSIONS: The selected food frequency questions proved sufficient to describe sociodemographic differences in dietary habits, and this method may......". DESIGN: Cross-sectional population survey. SUBJECTS: A total of 480 men, 515 women, aged 15-90 y. Random sample of private telephone numbers drawn from regional telephone records, geographically stratified. Participation rate 62%. METHODS: Computer-assisted telephone interviews, including six food...

  20. Nurturing healthy dietary habits among children and youth in Singapore.

    Science.gov (United States)

    Shiu, Letty Kwok Chong; Loke, Wong Mun; Vijaya, K; Sandhu, Nimrta Kaur

    2012-01-01

    Healthy diet is a key tenet in the prevention of many chronic diseases. Nurturing healthy dietary habits is especially important in childhood as this is a critical period of growth and development. Furthermore, dietary habits are shaped from an early age with many of them forming even below the age of 5 years. Therefore, the importance of nurturing healthy dietary habits during a child's formative years cannot be underestimated. Reducing fat, salt and sugar intake and at the same time, advocating the consumption of adequate whole-grains, fruit and vegetables among the population remain the cornerstone of the Singapore Health Promotion Board's (HPB) key nutrition initiatives. To achieve this, HPB adopts a multi-pronged approach comprising various strategies to promote healthy eating among children and youth in Singapore. This article provides an overview of these strategies and the broad range of nutrition education efforts targeted at the young.

  1. Plate tectonics and planetary habitability: current status and future challenges.

    Science.gov (United States)

    Korenaga, Jun

    2012-07-01

    Plate tectonics is one of the major factors affecting the potential habitability of a terrestrial planet. The physics of plate tectonics is, however, still far from being complete, leading to considerable uncertainty when discussing planetary habitability. Here, I summarize recent developments on the evolution of plate tectonics on Earth, which suggest a radically new view on Earth dynamics: convection in the mantle has been speeding up despite its secular cooling, and the operation of plate tectonics has been facilitated throughout Earth's history by the gradual subduction of water into an initially dry mantle. The role of plate tectonics in planetary habitability through its influence on atmospheric evolution is still difficult to quantify, and, to this end, it will be vital to better understand a coupled core-mantle-atmosphere system in the context of solar system evolution. © 2012 New York Academy of Sciences.

  2. Sleep habits, academic performance, and the adolescent brain structure.

    Science.gov (United States)

    Urrila, Anna S; Artiges, Eric; Massicotte, Jessica; Miranda, Ruben; Vulser, Hélène; Bézivin-Frere, Pauline; Lapidaire, Winok; Lemaître, Hervé; Penttilä, Jani; Conrod, Patricia J; Garavan, Hugh; Paillère Martinot, Marie-Laure; Martinot, Jean-Luc

    2017-02-09

    Here we report the first and most robust evidence about how sleep habits are associated with regional brain grey matter volumes and school grade average in early adolescence. Shorter time in bed during weekdays, and later weekend sleeping hours correlate with smaller brain grey matter volumes in frontal, anterior cingulate, and precuneus cortex regions. Poor school grade average associates with later weekend bedtime and smaller grey matter volumes in medial brain regions. The medial prefrontal - anterior cingulate cortex appears most tightly related to the adolescents' variations in sleep habits, as its volume correlates inversely with both weekend bedtime and wake up time, and also with poor school performance. These findings suggest that sleep habits, notably during the weekends, have an alarming link with both the structure of the adolescent brain and school performance, and thus highlight the need for informed interventions.

  3. Panspermia in tightly-packed habitable multi-planet systems

    Science.gov (United States)

    Veras, D.; Armstrong, D. J.; Schaefer, H.; Gutierrez-Marcos, J. F.; Hollands, M.

    2017-09-01

    The discovery of multiple planets in the habitable zone of the TRAPPIST-1 system is a watershed in exoplanetary science. As missions such as PLATO extend habitable zone sensitivity out to 1 au, we can expect an increasing number of similarly exciting systems. Consequently, developing analytical techniques to quantify extrasolar intra-system panspermia will become increasingly important. Here, we apply an impulse formalism from Jackson et al. (2014) to determine the asteroid impact characteristics which would be necessary to transport life both inwards and outwards within tightly-packed multi-planet habitable systems. We provide estimates for the dissemination of life within those systems, and assess the prospects for eukaryotic and microbial survival at both impact and in space.

  4. PAYING FOR PERFORMANCE: THE POWER OF INCENTIVES OVER HABITS

    Science.gov (United States)

    Sindelar, Jody L.

    2010-01-01

    New evidence suggests that individuals do not always make rational decisions, especially with regard to health habits. Smoking, misuse of alcohol, overeating and illicit drug use are leading causes of morbidity and mortality. Thus, influencing health habits is critical for improving overall health and well-being. This editorial argues that economists should take a more active role in shaping individuals’ health habits. Two recent innovations in economic theory pave the way. One change is that some economists now view rationality as bounded and willpower in short supply. Another, related to the first, is a more accepting perspective on paternalism, authorizing economists to help individuals make better choices when the neoclassical model breaks down. Findings from psychology offer incentive-based approaches; specifically, contingency management (CM). Economists could use this approach as a basis for developing public and private policies. PMID:18348117

  5. Spacecraft Habitable Volume: Results of an Interdisciplinary Workshop

    Science.gov (United States)

    Fitts, David J.; Connolly, Janis; Howard, Robert

    2011-01-01

    NASA's Human Exploration Framework Team posed the question: "Is 80 cubic meters per person of habitable volume acceptable for a proposed Deep Space Habitat?" The goal of the workshop was to address the "net habitable volume" necessary for long-duration human spaceflight missions and identify design and psychological issues and mitigations. The objectives were: (1) Identify psychological factors -- i.e., "stressors" -- that impact volume and layout specifications for long duration missions (2) Identify mitigation strategies for stressors, especially those that can be written as volume design specifications (3) Identify a forward research roadmap -- i.e., what future work is needed to define and validate objective design metrics? (4) Provide advisories on the human factors consequences of poor net habitable volume allocation and layout design.

  6. Eating Habits and Associated Factors Among Adolescent Students in Jordan.

    Science.gov (United States)

    Dalky, Heyam F; Al Momani, Maysa H; Al-Drabaah, Taghreed Kh; Jarrah, Samiha

    2017-08-01

    The study aimed to assess adolescent patterns of eating habits, determine factors influencing these patterns, and identify male and female differences related to eating habits. Using a cross-sectional study approach, a sample of adolescents ( N = 423) in randomly selected clusters chosen from government and private schools in the south of Jordan completed self-administered questionnaires relating to socio-demographic data and personal eating habits. Results showed that parents, peers, and mass media are contributing factors, with peer pressure likely outweighing parental guidance. Males were more likely to be influenced by peers than females, whereas females were more likely to be influenced by media-based advertising. Lower body mass indices correlate with eating breakfast, which a majority of adolescents reported they do not do. Interventions targeted toward improving eating and active behaviors should involve peers as well as parents.

  7. What can we learn from atmospheres of transitioning low-mass towards habitable planets?

    Science.gov (United States)

    Ikoma, Masahiro

    2015-07-01

    Transit observations with the Kepler space telescope revealed that planets smaller than Neptune are much more abundant than gas giants beyond our Solar System. The observed mass-radius relationships for such small planets are known to be diverse, which may mean that the amount of the atmospheric gas differs from planet to planet. Also, recent observational characterization of atmospheres of some transiting low-mass exoplanets suggests that the atmospheric composition is also diverse. Thus, understanding the diversity of atmospheres of transiting low-mass planets and their origins must be a key to predicting possible diversity of planets in habitable zones. In this paper, I will overview recent theories of the formation and evolution of planetary atmosphere. I will also discuss what we can learn from on-going and future observations for characterizing transiting planet atmospheres.

  8. Modelling habits as self-sustaining patterns of sensorimotor behavior

    Directory of Open Access Journals (Sweden)

    Matthew Deems Egbert

    2014-08-01

    Full Text Available In the recent history of psychology and cognitive neuroscience, the notion of habit hasbeen reduced to a stimulus-triggered response probability correlation. In this paper we usea computational model to present an alternative theoretical view (with some philosophicalimplications, where habits are seen as self-maintaining patterns of behavior that shareproperties in common with self-maintaining biological processes, and that inhabit a complexecological context, including the presence and influence of other habits. Far from mechanicalautomatisms, this organismic and self-organizing concept of habit can overcome the dominatingatomistic and statistical conceptions, and the high temporal resolution effects of situatedness,embodiment and sensorimotor loops emerge as playing a more central, subtle and complex rolein the organization of behavior. The model is based on a novel iterant deformable sensorimotormedium (IDSM, designed such that trajectories taken through sensorimotor-space increasethe likelihood that in the future, similar trajectories will be taken. We couple the IDSM to sensorsand motors of a simulated body and environment and show that under certain conditions,the IDSM forms self-maintaining patterns of activity that operate across the IDSM, the body,and the environment. We present various environments and the resulting habits that form inthem. The model acts as an abstraction of habits at a much needed sensorimotor meso-scalebetween microscopic neuron-based models and macroscopic descriptions of behavior. Finally,we discuss how this model and extensions of it can help us understand aspects of behavioralself-organization, historicity and autonomy that remain out of the scope of contemporaryrepresentationalist frameworks.

  9. Modeling habits as self-sustaining patterns of sensorimotor behavior

    Science.gov (United States)

    Egbert, Matthew D.; Barandiaran, Xabier E.

    2014-01-01

    In the recent history of psychology and cognitive neuroscience, the notion of habit has been reduced to a stimulus-triggered response probability correlation. In this paper we use a computational model to present an alternative theoretical view (with some philosophical implications), where habits are seen as self-maintaining patterns of behavior that share properties in common with self-maintaining biological processes, and that inhabit a complex ecological context, including the presence and influence of other habits. Far from mechanical automatisms, this organismic and self-organizing concept of habit can overcome the dominating atomistic and statistical conceptions, and the high temporal resolution effects of situatedness, embodiment and sensorimotor loops emerge as playing a more central, subtle and complex role in the organization of behavior. The model is based on a novel “iterant deformable sensorimotor medium (IDSM),” designed such that trajectories taken through sensorimotor-space increase the likelihood that in the future, similar trajectories will be taken. We couple the IDSM to sensors and motors of a simulated robot, and show that under certain conditions, the IDSM conditions, the IDSM forms self-maintaining patterns of activity that operate across the IDSM, the robot's body, and the environment. We present various environments and the resulting habits that form in them. The model acts as an abstraction of habits at a much needed sensorimotor “meso-scale” between microscopic neuron-based models and macroscopic descriptions of behavior. Finally, we discuss how this model and extensions of it can help us understand aspects of behavioral self-organization, historicity and autonomy that remain out of the scope of contemporary representationalist frameworks. PMID:25152724

  10. Voice Habits and Behaviors: Voice Care Among Flamenco Singers.

    Science.gov (United States)

    Garzón García, Marina; Muñoz López, Juana; Y Mendoza Lara, Elvira

    2017-03-01

    The purpose of this study is to analyze the vocal behavior of flamenco singers, as compared with classical music singers, to establish a differential vocal profile of voice habits and behaviors in flamenco music. Bibliographic review was conducted, and the Singer's Vocal Habits Questionnaire, an experimental tool designed by the authors to gather data regarding hygiene behavior, drinking and smoking habits, type of practice, voice care, and symptomatology perceived in both the singing and the speaking voice, was administered. We interviewed 94 singers, divided into two groups: the flamenco experimental group (FEG, n = 48) and the classical control group (CCG, n = 46). Frequency analysis, a Likert scale, and discriminant and exploratory factor analysis were used to obtain a differential profile for each group. The FEG scored higher than the CCG in speaking voice symptomatology. The FEG scored significantly higher than the CCG in use of "inadequate vocal technique" when singing. Regarding voice habits, the FEG scored higher in "lack of practice and warm-up" and "environmental habits." A total of 92.6% of the subjects classified themselves correctly in each group. The Singer's Vocal Habits Questionnaire has proven effective in differentiating flamenco and classical singers. Flamenco singers are exposed to numerous vocal risk factors that make them more prone to vocal fatigue, mucosa dehydration, phonotrauma, and muscle stiffness than classical singers. Further research is needed in voice training in flamenco music, as a means to strengthen the voice and enable it to meet the requirements of this musical genre. Copyright © 2017 The Voice Foundation. Published by Elsevier Inc. All rights reserved.

  11. ERICA: prevalence of healthy eating habits among Brazilian adolescents.

    Science.gov (United States)

    Barufaldi, Laura Augusta; Abreu, Gabriela de Azevedo; Oliveira, Juliana Souza; dos Santos, Debora França; Fujimori, Elizabeth; Vasconcelos, Sandra Mary Lima; de Vasconcelos, Francisco de Assis Guedes; Tavares, Bruno Mendes

    2016-02-01

    OBJECTIVE To describe the prevalence of eating habits considered healthy in adolescents according to sex, age, education level of the mother, school type, session of study, and geographic region. METHODS The assessed data come from the Study of Cardiovascular Risks in Adolescents (ERICA), a cross-sectional, national and school-based study. Adolescents of 1,247 schools of 124 Brazilian municipalities were evaluated using a self-administered questionnaire with a section on aspects related to eating behaviors. The following eating behaviors were considered healthy: consuming breakfast, drinking water, and having meals accompanied by parents or legal guardians. All prevalence estimates were presented proportionally, with their respective 95% confidence intervals. The Chi-square test was used to evaluate the differences in healthy eating habits prevalences according to other variables. The module survey of the Stata program version 13.0 was used to analyze complex data. RESULTS We evaluated 74,589 adolescents (72.9% of the eligible students). Of these, 55.2% were female, average age being 14.6 years (SD = 1.6). Among Brazilian adolescents, approximately half of them showed healthy eating habits when consuming breakfast, drinking five or more glasses of water a day, and having meals with parents or legal guardians. All analyzed healthy eating habits showed statistically significant differences by sex, age, type of school, session of study, or geographic region . CONCLUSIONS We suggest that specific actions of intersectoral approach are implemented for the dissemination of the benefits of healthy eating habits. Older female adolescents (15 to 17 years old) who studied in public schools, resided in the Southeast region, and whose mothers had lower education levels, should be the focus of these actions since they present lower frequencies concerning the evaluated healthy habits.

  12. Water in Extrasolar Planets and Implications for Habitability

    Science.gov (United States)

    Noack, Lena; Snellen, Ignas; Rauer, Heike

    2017-10-01

    Exoplanet detection missions have found thousands of planets or planet candidates outside of the Solar System—some of which are in the habitable zone, where liquid water is possible at the surface. We give an overview of the recent progress in observations of water-rich exoplanets, detection of water in the atmosphere of gas giants and less-massive targets, and modelling of the interior and evolution of water layers in exoplanets. We summarise the possible habitability of water-rich planets and discuss the potential of future missions and telescopes towards the detection of water in the atmosphere of low-mass exoplanets or on their surface.

  13. Food habits of redheads at the Horicon marsh, Wisconsin

    Science.gov (United States)

    Kenow, K.P.; Rusch, D.H.

    1996-01-01

    Food habits of Redheads (Aythya americana) investigated at the Horicon National Wildlife Refuge, Wisconsin, during 1983-1985. Prelaying females consumed plant material almost exclusively, primarily seeds of moist-soil plant species. The diet of laying and incubating females was dominated by seeds but also contained 16-17% animal matter. Consumption of animal matter during egg production was substantially lower than reported in other studies of food habits of Redheads. The diet of Juvenile Redheads changed with age. Animal foods were nearly half of the diet of ducklings diversity of flooding regimes may promote plant communities that produce importance food resources for Redheads on the Horicon Marsh.

  14. Habit Formation, Surplus Consumption and Return Predictability: International Evidence

    DEFF Research Database (Denmark)

    Engsted, Tom; Hyde, Stuart; Møller, Stig V.

    On an international post World War II dataset, we use an iterated GMM pro- cedure to estimate and test the Campbell-Cochrane (1999) habit formation model. In addition, we analyze the predictive power of the surplus consumption ratio for future asset returns. We find that, although there are impor......On an international post World War II dataset, we use an iterated GMM pro- cedure to estimate and test the Campbell-Cochrane (1999) habit formation model. In addition, we analyze the predictive power of the surplus consumption ratio for future asset returns. We find that, although...

  15. Cocrystal habit engineering to improve drug dissolution and alter derived powder properties.

    Science.gov (United States)

    Serrano, Dolores R; O'Connell, Peter; Paluch, Krzysztof J; Walsh, David; Healy, Anne Marie

    2016-05-01

    Cocrystallization of sulfadimidine (SDM) with suitable coformers, such as 4-aminosalicylic acid (4-ASA), combined with changes in the crystal habit can favourably alter its physicochemical properties. The aim of this work was to engineer SDM : 4-ASA cocrystals with different habits to investigate the effect on dissolution, and the derived powder properties of flow and compaction. Cocrystals were prepared in a 1 : 1 molar ratio by solvent evaporation using ethanol (habit I) or acetone (habit II), solvent evaporation followed by grinding (habit III) and spray drying (habit IV). Powder X-ray diffraction showed Bragg peak position was the same in all the solid products. The peak intensity varied, indicating different preferred crystal orientation confirmed by SEM micrographs: large prismatic crystals (habit I), large plate-like crystals (habit II), small cube-like crystals (habit III) and microspheres (habit IV). The habit III exhibited the fasted dissolution rate; however, it underwent a polymorphic transition during dissolution. Habits I and IV exhibited the highest Carr's compressibility index, indicating poor flowability. However, habits II and III demonstrated improved flow. Spray drying resulted in cocrystals with improved compaction properties. Even for cocrystals with poor pharmaceutical characteristics, a habit can be engineered to alter the dissolution, flowability and compaction behaviour. © 2015 Royal Pharmaceutical Society.

  16. Preliminary studies on some aspects of Kikuyu food habits

    NARCIS (Netherlands)

    Hoorweg, J.C.; Niemeijer, R.

    1980-01-01

    Description of a research project. The studies cover general aspects of Kikuyu food habits such as foods presently in use, the classification of foods and food preferences for children. The emphasises is on the methods employed in these studies which can also be used elsewhere to obtain information

  17. Fresh Food Program Promotes Healthy Eating Habits among Children

    Science.gov (United States)

    Kish, Stacy

    2008-01-01

    Communities across the nation are fighting the increased incidence of childhood obesity and Type II diabetes. With funding from USDA's Cooperative State Research, Education, and Extension Service (CSREES), a group in Illinois is promoting environmental sustainability and healthy eating habits in young Americans. Seven Generations Ahead's…

  18. breakfast habits among school children in selected communities in ...

    African Journals Online (AJOL)

    2014-06-01

    Jun 1, 2014 ... school children (n=359) between the ages of 6-19 years in Manya Krobo in the Eastern Region of Ghana. Questionnaires were used to collect information on background characteristics and breakfast consumption habits. The 24-hour dietary recall method was used to obtain information on the children's ...

  19. 1 Food and Feeding Habits of the Guppy.cdr

    African Journals Online (AJOL)

    Administrator

    gills feed on detritus, diatoms and filamentous algae. P. reticulata feeds on zooplankton, larvae of small insects and detritus (Arthington, 1989; Rodriguez,. 1997). Despite the value of P. reticulata to the local populace and its potentials in export. Food and Feeding Habits of the Guppy, Poecilia reticulata, from Drainage Canal ...

  20. Bowel Habits of Preterm Infants in Ilorin | Adegboye | Nigerian ...

    African Journals Online (AJOL)

    Objective: To determine the pattern of bowel habits of preterm infants in the first 10 days of postnatal life. Methods: One hundred and forty preterm infants delivered at the University of Ilorin Teaching Hospital (UITH) or referred to it within twelve hours of delivery, were studied. The babies were divided into two equal groups ...

  1. Habit-based asset pricing with limited participation consumption

    DEFF Research Database (Denmark)

    Møller, Stig Vinther; Bach, Christian

    2011-01-01

    We calibrate and estimate a consumption-based asset pricing model with habit formation using limited participation consumption data. Based on survey data of a representative sample of American households, we distinguish between assetholder and non-assetholder consumption, as well as the standard...

  2. [Physical activity and health habits in Argentinian undergraduates].

    Science.gov (United States)

    Pérez Ugidos, Guillermo; Laíño, Fernando A; Zelarayán, Julio; Márquez, Sara

    2014-10-01

    Deterioration of healthy habits in young people, particularly undergraduates, justifies their study in these populations. The aim of the present research is to analyze physical activity levels of students from the Universidad Nacional de La Matanza (Argentina), trying to describe homogeneous groups by demographic characteristics, health habits and perceived wellbeing, and to identify the level of physical activity that best describes each of the groups. Participants were 554 students (281 males and 273 females) of different careers which were applied the Global Physical Activity Questionnaire (GPAQ), and a survey related to health habits, perception of happiness and other demographic variables. Measures of central tendency and variability, and percentiles P25 and P75, were calculated for all variables. Segmentation was performed using hierarchical cluster analysis, after a previous factor analysis. 79.8% of students, and 97.2% of Physical Education students met the recommendations of physical activity. Students identified with a high physical activity level were those who attended in day shift, did not smoke, did not consume alcohol or drugs, did not work, had no children or stable partner, and with a medium socio-economic level. It is suggested the need for a strong educational intervention by universities to promote healthy habits and regular performance of physical activity, as they have a primary social responsibility regarding these issues. Copyright AULA MEDICA EDICIONES 2014. Published by AULA MEDICA. All rights reserved.

  3. Dietary Habits and Body Size Perception of Elementary School Children

    Science.gov (United States)

    Murimi, Mary W.

    2004-01-01

    This study assessed the attitudes and concerns of children in grades 1 through 5 regarding their perceived body size and ideal body size, and it assessed their Body Mass Index (BMI) and dietary habits. This study found an overweight prevalence of 11.4%, based on the children's BMI. Most of the overweight students were either African American or…

  4. Activity and dietary habits of mothers and children: close ties.

    Science.gov (United States)

    Greenberg, Robert S; Ariza, Adolfo J; Binns, Helen J

    2010-11-01

    To examine associations between activity and dietary habits reported by mothers for themselves and their children aged 2 to 11 years. Cross-sectional, consecutive samples of parents at 13 primary care practices were surveyed on health behaviors. Survey questions were used to define 5 "healthy" habits: low-fat milk choice; low fast food use; low weekend screen time; low juice/sweet drinks intake; and high-frequency physical activity. Mixed-effects logistic regression models were applied. Responses from a socioeconomically diverse group of 2115 mothers were analyzed. For each healthy behavior self-reported by the mother, the odds of the healthy behavior being reported for the child were significantly higher (range: odds ratio [OR] = 3.2 for high-frequency physical activity to OR = 19.7 for low-fat milk choice). Mothers and children often have similar health habits. The impact of clinician counseling for children may be strengthened by promotion of healthy habits for their mothers.

  5. Food habits of bald eagles wintering in northern Arizona

    Science.gov (United States)

    Teryl G. Grubb; Roy G. Lopez

    2000-01-01

    We used pellets collected from roosts to supplement incidental foraging observations to identify prey species of Bald Eagles (Haliaeetus leucoughalus) and to evaluate spatial and temporal trends in their food habits while wintering in northern Arizona between 1994-96. We analyzed 1057 pellets collected from 14 roosts, and identified five mammal and...

  6. An Assessment of the Nutritional Knowledge and Eating Habits of ...

    African Journals Online (AJOL)

    2012r

    2014-09-30

    Sep 30, 2014 ... The objectives of this paper were to identify the nutritional knowledge and beliefs of vegetarians, assess their eating habits and also investigate on the reasons why they have adopted a vegetarian diet. A survey questionnaire was adopted for the study. A quota sampling of 100 vegetarians from four ...

  7. An Assessment of the Nutritional Knowledge and Eating Habits of ...

    African Journals Online (AJOL)

    The objectives of this paper were to identify the nutritional knowledge and beliefs of vegetarians, assess their eating habits and also investigate on the reasons why they have adopted a vegetarian diet. A survey questionnaire was adopted for the study. A quota sampling of 100 vegetarians from four different age groups was ...

  8. Endogenous factors that relate to the eating habits of adolescents ...

    African Journals Online (AJOL)

    The aim in this research was to determine how endogenous factors such as gender, intelligence, self-concept, and personality relate to the eating habits of adolescents. An empirical investigation was conducted using 340 secondary school learners, 162 boys and 178 girls. From the results it appeared that girls tend to have ...

  9. The Reading Habits of Church Active Mormon Women.

    Science.gov (United States)

    Appleton, Marianne; Cranney, A. Garr

    Data from 149 female members of the Church of Jesus Christ of Latter Day Saints (LDS) were used to construct a composite of the reading habits and their relation to other characterisitics of this group. The typical respondent was a married woman between 26 and 40 years old who had attended college but remained at home to care for children under…

  10. Alcoholic beverage preference and dietary habits: a systematic literature review

    NARCIS (Netherlands)

    Sluik, D.; Bezemer, R.A.; Sierksma, A.; Feskens, E.J.M.

    2016-01-01

    Introduction: The aim of this review is to systematically and critically evaluate the existing literature into the association between alcoholic beverage preference and dietary habits in adults. Methods: A literature search was conducted in the databases of Medline (Pubmed), ISI Web of Knowledge,

  11. Lifestyle in Curacao - Smoking, alcohol consumption, eating habits and exercise

    NARCIS (Netherlands)

    Grol, MEC; Halabi, YT; Gerstenbluth, [No Value; Alberts, JF; ONiel, J

    The Curacao Health Study was carried out among a randomized sample (n = 2248, response rate = 85%) of the adult non-institutionalized population in order to assess aspects of lifestyle that may pose health risks. Factors examined were tobacco and alcohol use, eating habits and exercise behaviour.

  12. Business Communication Students Learn to Hear a Bad Speech Habit

    Science.gov (United States)

    Bell, Reginald L.; Liang-Bell, Lei Paula; Deselle, Bettye

    2006-01-01

    Students were trained to perceive filled pauses (FP) as a bad speech habit. In a series of classroom sensitivity training activities, followed by students being rewarded to observe twenty minutes of live television from the public media, no differences between male and female Business Communication students was revealed. The practice of teaching…

  13. Study on Feeding Habit of Clariid Catfish ( Clarias Gariepinus ...

    African Journals Online (AJOL)

    A survey was conducted to investigate the feeding habit of catfish (Clarias gariepinus Burchell, 1822) in Otamiri River, South-Eastern Nigeria. Stomach items analyzed include mainly algae, fish scales, annelids, benthic invertebrates, and detritus confirmed the fish as omnivorous species. However, few stomach contents ...

  14. Using Awareness Training to Decrease Nervous Habits during Public Speaking

    Science.gov (United States)

    Spieler, Claire; Miltenberger, Raymond

    2017-01-01

    This study evaluated the effectiveness of awareness training for the reduction of three nervous habits that manifest during public speaking: filled pauses, tongue clicks, and inappropriate use of the word "like." Four university students delivered short speeches during baseline and assessment sessions. Awareness training resulted in…

  15. The smoking habits, attitudes towards smoking and knowledge ...

    African Journals Online (AJOL)

    South African Family Practice ... Background : The study aimed to i) investigate the smoking habits of students attending tertiary institutions of learning in the Eastern Cape Province (ECP) and ii) ... Forty-five per cent of the Coloured students smoked, while the figures for Whites and Blacks were 26% and 25% respectively.

  16. Relationship between dietary habits and nutritional status among ...

    African Journals Online (AJOL)

    2017-02-09

    Feb 9, 2017 ... Dietary habits and choice of food influences nutrient and energy consumption and .... sis to identify effect modification and control for con- founding. Results ..... nutritious and/or junk foods; 5 binge eating and starva- tion.6 The ...

  17. Causes and consequences of poor reading habit on primary school ...

    African Journals Online (AJOL)

    The aim of this research work was to find out the causes and consequences of poor reading habit on primary school pupils in Enugu urban. Out of the whole population, 200 (two hundred) teachers and five primary schools were selected. The method of data collection was thro questionnaire while collected data collected ...

  18. Physical fitness, nutritional habits and daily locomotive action of 12 ...

    African Journals Online (AJOL)

    The results of this study support the need for intervention at school through physical education and health education lessons, to inform pupils about the health risks associated with limited physical activity and unhealthy nutritional habits. Another goal should be to motivate and create behaviours that are conducive to better ...

  19. Home is where the habit of the heart is

    NARCIS (Netherlands)

    Wilde, Mandy De

    2016-01-01

    Dutch neighborhood policy is increasingly, and quite literally, addressing the habits of the heart-residents' values, emotions, and intimate relationships-To encourage what we may call "affective citizenship." Central to this governmental strategy is the creation of communities as spheres of

  20. Sleep Habits and Patterns of College Students: A Preliminary Study.

    Science.gov (United States)

    Buboltz, Walter C.; Brown, Franklin; Soper, Barlow

    2001-01-01

    Surveyed college students regarding their sleep habits, patterns, and problems. A large majority had at least occasional sleep problems, with women reporting more of some difficulties than men. The most common sleep difficulties were taking more than 30 minutes to fall asleep, trouble falling asleep more than three times per week, morning…

  1. Cigarette smoking and habits (1): Some studies on gender and ...

    African Journals Online (AJOL)

    Cigarette smoking is an intense growing habit among today's youth. A survey using a structured questionnaire was carried out among 100 randomly picked second year students of University of Brighton, approved by a University of Brighton Ethical Committee. It was tested for reliability to ensure consistency using the Test ...

  2. Radio listening habits of pupils of Nomadic Pastoralists and Migrant ...

    African Journals Online (AJOL)

    The need to integrate Nigeria with other nations in the world that have achieved landmark results in Interactive Radio Instruction (IRI) innovation necessitated this study on radio listening habits of pupils of nomadic pastoralists and migrant fisherfolks in Nigeria. The study was carried out in four pastoralists' states of Borno, ...

  3. Modeling as an Engineering Habit of Mind and Practice

    Science.gov (United States)

    Lammi, Matthew D.; Denson, Cameron D.

    2017-01-01

    In this paper we examine a case study of a pedagogical strategy that focuses on the teaching of modeling as a habit of mind and practice for novice designers engaged in engineering design challenges. In an engineering design course, pre-service teachers created modeling artifacts in the form of conceptual models, graphical models, mathematical…

  4. THE HABITABLE ZONES OF PRE-MAIN-SEQUENCE STARS

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, Ramses M.; Kaltenegger, Lisa [Institute for Pale Blue Dots, Cornell University, Ithaca, NY (United States)

    2014-12-20

    We calculate the pre-main-sequence habitable zone (HZ) for stars of spectral classes F-M. The spatial distribution of liquid water and its change during the pre-main-sequence phase of protoplanetary systems is important for understanding how planets become habitable. Such worlds are interesting targets for future missions because the coolest stars could provide habitable conditions for up to 2.5 billion years post-accretion. Moreover, for a given star type, planetary systems are more easily resolved because of higher pre-main-sequence stellar luminosities, resulting in larger planet-star separation for cool stars than is the case for the traditional main-sequence (MS) HZ. We use one-dimensional radiative-convective climate and stellar evolutionary models to calculate pre-main-sequence HZ distances for F1-M8 stellar types. We also show that accreting planets that are later located in the traditional MS HZ orbiting stars cooler than a K5 (including the full range of M stars) receive stellar fluxes that exceed the runaway greenhouse threshold, and thus may lose substantial amounts of water initially delivered to them. We predict that M-star planets need to initially accrete more water than Earth did, or, alternatively, have additional water delivered later during the long pre-MS phase to remain habitable. Our findings are also consistent with recent claims that Venus lost its water during accretion.

  5. Deep Habits: Workshop as Critique in Creative Writing

    Science.gov (United States)

    Stukenberg, Jill

    2017-01-01

    The creative writing workshop, involving peer critique of manuscripts in progress, is deeply connected to many writerly habits of mind. As such, this article examines workshop as a signature pedagogy in creative writing. Through workshop, students develop awareness of their readers, understanding of how texts are created by readers and through…

  6. Food and Feeding Habits of Mona Monkey Cercopithecus Mona in ...

    African Journals Online (AJOL)

    The feeding habits of mona monkey Cercopithecus mona in Ayede/Isan forest reserve, Ayede, Ekiti State, Nigeria were studied for six months. Direct observation was used in the data collection. The study area was visited two days per week between 0600-1100hours and 1600-1800hours for the six months in the forest ...

  7. Food and feeding habits, condition factor and length-weight ...

    African Journals Online (AJOL)

    A study of the diet of Mugil cephalus and Pseudotolithus elongatus from Calabar Estuary in Calabar was carried out between the months of December 2007 to March 2008 at Nsidung Beach, a tributary of Calabar estuary, Cross River State, Nigeria to understand some aspect of food and feeding habits of these selected fish ...

  8. Effect of Health Education on the Riding Habits of Commercial ...

    African Journals Online (AJOL)

    BACKGROUND: The increasing number of motorcyclists in Nigeria has led to a rise in poor road safety practices leading to increased rate of accidents. This study was conducted to implement and evaluate the effect of safety education on riding habits of motorcyclists in Uyo, Nigeria. METHODS: The intervention study was ...

  9. Study habits among senior secondary school students in some ...

    African Journals Online (AJOL)

    ... significantly from students from low socio-economic homes. The recommendations made include (i) the need to teach study skills to senior secondary school students so that they can all cultivate good and effective study habits; and (ii) equal opportunities for studying should be provided to all students irrespective of sex.

  10. Lost habits and the acceptance of product service systems

    NARCIS (Netherlands)

    Schotman, Henrikus

    2017-01-01

    Product Service Systems (PSS) are a combination of products and services, jointly fulfilling a user’s need. PSS can offer numerous benefits for businesses, society and the environment, but consumer acceptance of PSS remains rather low. Required behaviour change and existing user habits are one of

  11. Prevalence of oral and parafunctional habits in Nigerian patients ...

    African Journals Online (AJOL)

    This study was conducted to determine the prevalence of oral and parafunctional habits in Nigerian patients suffering temporomandibular joint pain and dysfunction. It consisted of patients that were referred for treatment at the oral and maxillofacial surgery clinic of the University of Benin Teaching Hospital, Benin City, ...

  12. Evaluation of food and feeding habits of Hoplobatrachus occipitalis ...

    African Journals Online (AJOL)

    The food and feeding habits of Hoplobatrachus occipitalis (Dicroglossidae), in Obafemi Awolowo Campus, Ile-Ife were evaluated. This was with a view to determining the feeding behaviour and the foraging preference for prey by the species. The ingested food items were retrieved by stomach flushing and viewed under a ...

  13. Food and feeding habits of Clarias gariepinus (burchell 1822) in ...

    African Journals Online (AJOL)

    The food and feeding habit of the catfish Clarias gariepinus in Egbe Reservoir in Ekiti State, Nigeria was studied using 450 Clarias samples collected between January 2010 and November, 2010. Analysis of the stomach contents was done using numerical, frequency of occurrence and volumetric methods. The fish fed ...

  14. Library resource factors as predictors of reading habit among ...

    African Journals Online (AJOL)

    The study investigated the extent to which library resource factors such as availability, adequacy and utilisation of information resources predicted reading habits of senior secondary school students in Ogun State, Nigeria. The survey research design was adopted while questionnaire was used as major instruments of data ...

  15. Physical exercise: Knowledge, attitudes and habits of literate women ...

    African Journals Online (AJOL)

    This study assessed the knowledge, attitudes and habits of women as it relates to physical exercises and its benefits on health and well-being. The participants were recruited from various workplaces within lbadan North Municipality, Western Nigeria using convenience sampling. A questionnaire with close ended questions ...

  16. Analysis of Food And Feeding Habits of Catfish ( Bagrus bayad ...

    African Journals Online (AJOL)

    Food and feeding habits of the two size class of Bagrus bayad caught in River Rima and Goronyo Dam in north western Nigeria between October, 2002 and September, 2003 were studied for feeding adaptations and stomach contents. Feeding adaptive features such as mouth, gill rakers, dentition and gut system were ...

  17. Diet and dietary habits of Labeo senegalensis in a tropical ...

    African Journals Online (AJOL)

    The food composition and dietary habit of Labeo senegalensis at Idah area of river Niger was carried out between January and February, 2010. 155 samples were obtained from artisanal fishermen and brought to biological sciences laboratory for analysis. Fish samples were dissected and the stomach contents emptied ...

  18. Gender disparity in internet utilisation habits of medical students ...

    African Journals Online (AJOL)

    1,119 students comprising students of Basic Medical and Clinical sciences, constituted the population of the study. 120 students were selected as the sample for the study using Stratified Random Sam pling Technique. A researcher developed structured questionnaire tagged Gender Disparity and Internet Utilisation Habits ...

  19. Alcoholic Beverage Buying Habits of University of Delaware Students

    Science.gov (United States)

    Newton, John P.

    1978-01-01

    Goal of study was comparing alcoholic beverage buying habits of University of Delaware students with those of students at other colleges. Random sample of 639 was drawn from 13,000 undergraduates and interviews conducted. Drinking at Delaware was similar to that at other schools. Seniors spent significantly more on alcohol than freshmen. (Author)

  20. Study of Sleep Habits and Sleep Problems Among Medical Students ...

    African Journals Online (AJOL)

    Background: Good quality sleep and adequate amount of sleep are important in order to have better cognitive performance and avoid health problems and psychiatric disorders. Aim: The aim of this study was to describe sleep habits and sleep problems in a population of undergraduates, interns and postgraduate students ...

  1. Eating habits associated with Echinostoma malayanum infections in the Philippines.

    Science.gov (United States)

    Tangtrongchitr, A; Monzon, R B

    1991-12-01

    A survey of 61 residents belonging to 12 pre-selected families (having at least one member positive for echinostomiasis malayanum) from Barangay Malibago, Echague, Isabela (northern Luzon) suggested that infections with Echinostoma malayanum follow a "familial trend". The parasite is endemic because the raw ingestion of Lymnaea (Bullastra) cumingiana, the second intermediate host in the Philippines, is a learned habit passed down from one generation to the next. A questionnaire on eating habits revealed that Lymnaea (Bullastra) cumingiana or "birabid" was usually prepared raw or half-cooked after treatment with salt or "bagoong" (salted fish paste). It was abundant in rice fields during the wet months of the year, thus implying a seasonal infection pattern since eating frequency was affected by availability. Those who ate this snail reported a long duration of indulgence with this habit. In contrast, Pila luzonica or "kuhol", the second intermediate host of E. ilocanum, is subjected to similar eating practices but is rarely ingested raw or "half-cooked". Other than snails, shrimps, fish (Tilapia sp.) and meat are also eaten raw. This suggests that the local population is potentially susceptible to other food-borne helminthiases. Extensive use of mass media and public health education is necessary to awaken the awareness of the people to the potential hazards associated with their traditional eating habits.

  2. Feeding habits of songbirds in East Texas clearcuts during winter

    Science.gov (United States)

    Donald W. Worthington; R. Montague Jr. Whiting; James G. Dickson

    2004-01-01

    This east Texas study was undertaken to determine the importance of seeds of forbs, grasses, and woody shrubs to songbirds wintering in young pine plantations which had been established utilizing the clearcut regeneration system. The feeding habits and preferences of four species of songbirds, northern cardinals (Cardinalis cardinalis), song sparrows...

  3. Eating Habits of the Elderly in Asaba, Delta State, Nigeria ...

    African Journals Online (AJOL)

    Consumption of refined carbohydrate, fatty foods and alcoholic drink by the respondents were low. As much as 60.2% did not consume alcoholic drink. Conclusion: These educated elderly subjects portrayed healthy eating habits. However, it will be necessary to conduct similar survey among rural and illiterate elderly ...

  4. Sleep Habits and Patterns of College Students: An Expanded Study

    Science.gov (United States)

    Buboltz, Walter, Jr., Jenkins, Steve M.; Soper, Barlow; Woller, Kevin; Johnson, Patrick; Faes, Theresa

    2009-01-01

    This study represents an expansion of previous research investigating the prevalence of sleep difficulties in college students. Sleep quality and sleep habits were assessed via self-report questionnaires. Poor sleep quality was reported by 22.6% of participants, whereas 65.9% replied that they experienced occasional sleep problems. More than half…

  5. Chemical Evolution and the Galactic Habitable Zone of M31

    NARCIS (Netherlands)

    Carigi, Leticia; Garcia-Rojas, Jorge; Meneses-Goytia, Sofia

    2013-01-01

    We have computed the Galactic Habitable Zones (GHZs) of the Andromeda galaxy (M31) based on the probability of terrestrial planet formation, which depends on the metallicity (Z) of the interstellar medium, and the number of stars formed per unit surface area. The GHZ was obtained from a chemical

  6. Social, recreational and housing habits of residents of Selebi ...

    African Journals Online (AJOL)

    This study presents a survey of the existing status of the social, recreational and housing habits related to the environmental health of residents living within the Selebi-Phikwe Ni-Cu mine area, Botswana. Primary data of residents obtained through the administration of questionnaire and structured interviews was processed ...

  7. Chapter 22: Marbled Murrelet Food Habits and Prey Ecology

    Science.gov (United States)

    Esther E. Burkett

    1995-01-01

    Information on food habits of the Marbled Murrelet (Brachyramphus marmoratus) was compiled from systematic studies and anecdotal reports from Alaska to California. Major differences between the winter and summer diets were apparent, with euphausiids and mysids becoming more dominant during winter and spring. The primary invertebrate prey items were...

  8. Using Education and Time Maximization for Effective Study Habits of ...

    African Journals Online (AJOL)

    This paper explains that there is a blend of education and time maximization for effective study habits of students in Nigerian tertiary institutions. Education will certainly take its rightful place to enlighten and transform individuals, societies and nations as it will eliminate common problems like: being members of secret cults, ...

  9. Physical Activity and Smoking Habits in Relation to Weight Status ...

    African Journals Online (AJOL)

    Purpose: Understanding factors that impact overweight or obesity is an essential step towards formulating programs to prevent or control obesity in young adults. Thus, we aim to assess the prevalence of physical activity and smoking habits in relation to weight status among a sample of university students. Methods: A ...

  10. Gender, locus of control and smoking habits of undergraduate ...

    African Journals Online (AJOL)

    Health psychologists believe that a significant proportion of human morbidity and mortality could be significantly reduced and humans' quality of life greatly enhanced if people could be helped to correct their health-impairing habits and behaviours, such as smoking and other forms of substance abuse. The present study ...

  11. Awareness and habit: important factors in physical activity in children

    NARCIS (Netherlands)

    Kremers, S.P.J.; Dijkman, M.A.M.; de Meij, J.S.B.; Jurg, M.E.; Brug, J.

    2008-01-01

    Purpose - The purpose of this paper is to gain insight into the extent to which Dutch children are aware of their own physical activity level, and to what extent children's physical activity is habitual. Special attention was paid to the potential moderating effect of "awareness" and "habit

  12. Nutritional status, functional ability and food habits of ...

    African Journals Online (AJOL)

    The institutionalised ones appear to be better off than their counterparts. However, this condition is not equally reflected in their eating habits. Generally, most of the elderly have poor or no source of income, which make them to have poor living conditions. They are also faced with problems of functional disabilities of which ...

  13. The importance of timing for breaking commuters’ car driving habits

    DEFF Research Database (Denmark)

    Thøgersen, John

    2012-01-01

    A large sample of Copenhagen car drivers were randomly assigned to either receive a free month travel card for public transportation or serve as a control group. As predicted, the free travel card neutralized the negative effect of car driving habits and made the use of public transportation more...... alternatives to car-driving....

  14. Evaluation of dietary habits and caries experience among children ...

    African Journals Online (AJOL)

    There was no relationship between nutritional status and dental caries of children with HD and those without HD. However there was a relationship between the dietary habits and dental caries. "Kool" was related to caries experience of children with HD while milk/tea with sugar was related to caries experience of children ...

  15. Peer influence on the study habit of secondary school adolescents ...

    African Journals Online (AJOL)

    This study investigated the influence of peer group on the study habit of secondary school adolescents. A sample of two hundred and ninety two (292) students was randomly selected from nine schools in two Local Government Areas of Ogun State. Two instruments were used to collect data. They are: Adolescents' Peer ...

  16. Make Handwashing a Habit (A Minute of Health with CDC)

    Centers for Disease Control (CDC) Podcasts

    2016-10-13

    Regular handwashing helps prevent the spread of potentially harmful germs. This podcast discusses the importance of making proper handwashing (with soap and water) a regular habit.  Created: 10/13/2016 by MMWR.   Date Released: 10/13/2016.

  17. Reading Habits among Secondary School Students in Ondo State ...

    African Journals Online (AJOL)

    This survey investigated the reading habits of eight senior secondary school students in Ondo State Nigeria using a multistage sampling technique to draw three local government areas out of 18 in the State. Eight hundred copies of questionnaire were administered on 100 students from each of the eight schools sampled in ...

  18. Study habits and library usage among undergraduates in federal ...

    African Journals Online (AJOL)

    It is against this background that this study investigated the study habits and library usage among undergraduates in federal universities in South-West, Nigeria. The study adopted the survey research design. Questionnaire was used for data collection. Out of 2,086 undergraduate students from three federal universities ...

  19. Health Status and Lifestyle Habits of US Medical Students: A ...

    African Journals Online (AJOL)

    College of Nursing, University of Cincinnati, 1Clinical Translational Research Center, Cincinnati Children's Hospital. Medical Center ... Aims: This study assessed changes in students' health and lifestyle behaviors during medical school. Subjects and ... negative impact on personal health and lifestyle habits. The aim of this ...

  20. Food and Feeding Habits of the Guppy, Poecilia reticulata , from ...

    African Journals Online (AJOL)

    The food and feeding habits of the Guppy, Poecilia reticulata, from drainage canal systems in Lagos Metropolis, Nigeria, was investigated over a period of 24 months. Fish samples were collected monthly from 15 study sites. A total of 2400 fish stomachs were analyzed using the numerical and frequency of occurrence ...

  1. Saving and Habit Formation : Evidence from Dutch Panel Data

    NARCIS (Netherlands)

    Alessie, R.J.M.; Teppa, F.

    2002-01-01

    This paper focuses on the role of habit formation in individual preferences over consumption and saving.We closely relate to Alessie and Lusardi's (1997) model as we estimate a model which is based on their closed-form solution, where saving is expressed as a function of lagged saving and other

  2. Habit-based Asset Pricing with Limited Participation Consumption

    DEFF Research Database (Denmark)

    Bach, Christian; Møller, Stig Vinther

    We calibrate and estimate a consumption-based asset pricing model with habit formation using limited participation consumption data. Based on survey data of a representative sample of American households, we distinguish between assetholder and non-assetholder consumption, as well as the standard...

  3. Saving and habit formation : evidence from Dutch panel data

    NARCIS (Netherlands)

    Alessie, R.J.M.; Teppa, F.

    This paper focuses on the role of habit formation in individual preferences. In this study, the model of Alessie and Lusardi (Econ Lett 55:103-108, 1997) and its extension by Guariglia and Rossi (Oxf Econ Pap 54:1-19, 2002) are considered. Our empirical specifications are based on their closed-form

  4. Genetics of growth habit and photoperiodic response to flowering ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Genetics; Volume 93; Issue 1. Genetics of growth habit and photoperiodic response to flowering time in dolichos bean (Lablab purpureus (L.) Sweet). C. M. Keerthi S. Ramesh M. Byregowda A. Mohan Rao B. S. Rajendra Prasad P. V. Vaijayanthi. Research Note Volume 93 Issue 1 April 2014 pp ...

  5. Assessment of hygiene habits and attitudes among removable ...

    African Journals Online (AJOL)

    2014-12-01

    Dec 1, 2014 ... Aims: The aim of this study was conducting a survey of hygiene habits and use of removable partial dentures (RPDs) and correlate them with the social conditions of the interviewees. Methods: A total of 145 RPD wearers were interviewed by experienced clinical staff using a structured questionnaire.

  6. Dietary Habits and Nutritional Status of Rural School Age Children ...

    African Journals Online (AJOL)

    Stunting was significantly (p<0.05) higher among 10-14year old children (56.1%) than 5-9 year olds (34.6%). Conclusion: There is urgent need for nutrition intervention targeted at rural school age children inEbonyi State. Keywords: School age children, dietary habits, hemoglobin levels, stunting, overweight, underweight, ...

  7. Breakfast Habits among School Children in Selected Communities ...

    African Journals Online (AJOL)

    Background: Breakfast is considered the most important meal of the day, yet many people skip breakfast. Studies indicate that school age children who regularly skip breakfast are not likely to concentrate in class, thus affecting school performance. This study determined the breakfast habits and nutrient contributions of the ...

  8. Dietary habits, plasma polyunsaturated fatty acids and selected ...

    African Journals Online (AJOL)

    Dietary habits, plasma polyunsaturated fatty acids and selected coronary disease risk factors in Tanzania. ... Our results indicate that, there are significant differences in dietary patterns among the three study areas, and that the intake of fish is inversely associated with selected risk factors for coronary heart disease.

  9. Exploring exercise behavior, intention and habit strength relationships

    NARCIS (Netherlands)

    de Bruijn, G.J.; Rhodes, R.E.

    2011-01-01

    The purpose of this study was to explore the relevance of integrating exercise habit strength within the framework of the theory of planned behavior. Data were obtained from 538 undergraduate students [mean age=21.19 (SD=2.57); 28.4% males] using validated questionnaires and analyzed using

  10. Social Support for Exercise and Dietary Habits among College Students

    Science.gov (United States)

    Gruber, Kenneth J.

    2008-01-01

    An assessment inventory (the Friend/Peer Support-Health Eating Physical Activity Scale-FPS-HEPAS) was developed to measure social influence patterns of college student physical activity and food consumption habits. Principal components analysis of 50 items with two referent sets (friends and peers) produced two scales with common factors:…

  11. Restoring Residential Slums into Habitable Districts: A Study of Odo ...

    African Journals Online (AJOL)

    The study employed the use of questionnaire to gather information on the condition of buildings and socioeconomic variables. ... The study notes that there is hope in restoring the slum into a good and habitable environment and therefore recommends that government should wake up to her responsibility by providing ...

  12. Weight status and eating habits of adolescent Nigerian urban ...

    African Journals Online (AJOL)

    countries showing the influence of eating patterns on the escalating prevalence of obesity,[13] little is known about this relationship in the. Nigerian setting. Adolescent girls as a group are highly receptive to new food products and to fast foods, largely owing to peer group influence. As a consequence, their food habits tend ...

  13. Eating habits and obesity among Lebanese university students

    Directory of Open Access Journals (Sweden)

    Abdallah Abbass

    2008-10-01

    Full Text Available Abstract Background In the past year Lebanon has been experiencing a nutritional transition in food choices from the typical Mediterranean diet to the fast food pattern. As a consequence, the dietary habits of young adults have been affected; thus, overweight and obesity are increasingly being observed among the young. The purpose of this study is to assess the prevalence of overweight and obesity on a sample of students from the Lebanese American University (in Beirut and to examine their eating habits. Methods A cross-sectional survey of 220 students (43.6% male and 56.4% female, aged 20 ± 1.9 years, were chosen randomly from the Lebanese American University (LAU campus during the fall 2006 semester. Students were asked to fill out a self-reported questionnaire that included questions on their eating, drinking and smoking habits. Also, their weight, height, percentage body fat and body mass index were measured. Body mass index (BMI was used to assess students' weight status. Statistical analyses were performed using the Statistical Package for Social Sciences software (version 13.0 to determine overweight and obesity among students and to categorize eating habits. Results This study showed that the majority of the students (64.7% were of normal weight (49% male students compared to 76.8% female students. The prevalence of overweight and obesity was more common among male students compared to females (37.5% and 12.5% vs. 13.6% and 3.2%, respectively. In contrast, 6.4% female students were underweight as compared to 1% males. Eating habits of the students showed that the majority (61.4% reported taking meals regularly. Female students showed healthier eating habits compared to male students in terms of daily breakfast intake and meal frequency. 53.3% of female students reported eating breakfast daily or three to four times per week compared to 52.1% of male students. There was a significant gender difference in the frequency of meal intake (P

  14. Eating habits and obesity among Lebanese university students.

    Science.gov (United States)

    Yahia, Najat; Achkar, Alice; Abdallah, Abbass; Rizk, Sandra

    2008-10-30

    In the past year Lebanon has been experiencing a nutritional transition in food choices from the typical Mediterranean diet to the fast food pattern. As a consequence, the dietary habits of young adults have been affected; thus, overweight and obesity are increasingly being observed among the young. The purpose of this study is to assess the prevalence of overweight and obesity on a sample of students from the Lebanese American University (in Beirut) and to examine their eating habits. A cross-sectional survey of 220 students (43.6% male and 56.4% female), aged 20 +/- 1.9 years, were chosen randomly from the Lebanese American University (LAU) campus during the fall 2006 semester. Students were asked to fill out a self-reported questionnaire that included questions on their eating, drinking and smoking habits. Also, their weight, height, percentage body fat and body mass index were measured. Body mass index (BMI) was used to assess students' weight status. Statistical analyses were performed using the Statistical Package for Social Sciences software (version 13.0) to determine overweight and obesity among students and to categorize eating habits. This study showed that the majority of the students (64.7%) were of normal weight (49% male students compared to 76.8% female students). The prevalence of overweight and obesity was more common among male students compared to females (37.5% and 12.5% vs. 13.6% and 3.2%, respectively). In contrast, 6.4% female students were underweight as compared to 1% males. Eating habits of the students showed that the majority (61.4%) reported taking meals regularly. Female students showed healthier eating habits compared to male students in terms of daily breakfast intake and meal frequency. 53.3% of female students reported eating breakfast daily or three to four times per week compared to 52.1% of male students. There was a significant gender difference in the frequency of meal intake (P = 0.001). Intake of colored vegetables and

  15. Swedish nurses encounter barriers when promoting healthy habits in children.

    Science.gov (United States)

    Ljungkrona-Falk, Lena; Brekke, Hilde; Nyholm, Maria

    2014-12-01

    To increase the understanding of difficulties in promoting healthy habits to parents, we explore barriers in health-care provision. The aim of this study is to describe nurses' perceived barriers when discussing with parents regarding healthy food habits, physical activity and their child's body weight. A mixed method approach was chosen. Nurses (n = 76) working at 29 different Child Health Care Centers' in an area in west Sweden were included in the study. Three focus group interviews were conducted and 17 nurses were selected according to maximum variation. Data were categorized and qualitative content analysis was the chosen analysis method. In the second method, data were obtained from a questionnaire distributed to all 76 nurses. The latent content was formulated into a theme: even with encouragement and support, the nurses perceive barriers of both an external and internal nature. The results identified four main barriers: experienced barriers in the workplace-internal and external; the nurse's own fear and uncertainty; perceived obstacles in nurse-parent interactions and modern society impedes parents' ability to promote healthy habits. The nurses' perceived barriers were confirmed by the results from 62 of the nurses who completed the questionnaire. Despite education and professional support, the health professionals perceived both external and internal barriers in promoting healthy habits to parents when implementing a new method of health promotion in primary care. Further qualitative studies are needed to gain deeper understanding of the perceived barriers when promoting healthy habits to parents. © The Author (2013). Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

  16. Integrating Science and Pedagogy Breaks our Unreflective Habit of Teaching

    Science.gov (United States)

    McManus, D. A.

    2005-12-01

    Almost no faculty, particularly at research universities, were taught to teach. We merely continued the habit of teaching that we experienced as student learners, with little thought to assumptions and goals underlying the habit. Until the integration of science and pedagogy, this habit had rarely undergone broad critical examination. Rather, it had been tacitly accepted as "common sense," and reasonably so, when we neglected to examine it. It was treated as a "force of nature." Now we use the results of research in pedagogy and the science of learning to erect new educational assumptions and goals. The following are some contrasts of new and old assumptions and goals: Assumptions about education: The process of student learning is as important as the content taught; rather than only the content taught being important. Learning is a dynamic process of restructuring, rather than merely a process of accumulation. Students enter class with a perceptual framework intact, rather than with "empty" minds. Most students are different from the professor, rather than being like the professor. Educational goals: The professor creates a learning environment for the students, rather than transfers information to the students. Students develop skills in constructing and using knowledge, rather than accumulate knowledge. To apply these new assumptions and goals in the classroom is to break an old habit. To break a habit this hoary is difficult and risky. It requires of us more than learning other teaching methods, new methods of assessing results, and new responsibilities as a teacher. It means internalizing these new assumptions and goals. It means entering a different world of education that places the greatest importance on what the students learn, what they take away from the class, rather than on what the professor teaches, what he or she puts into the class. We learn to apply to our teaching the risk acceptance, feedback, reflection, adaptation, creativity, and partnership

  17. A genealogical map of the concept of habit.

    Science.gov (United States)

    Barandiaran, Xabier E; Di Paolo, Ezequiel A

    2014-01-01

    The notion of information processing has dominated the study of the mind for over six decades. However, before the advent of cognitivism, one of the most prominent theoretical ideas was that of Habit. This is a concept with a rich and complex history, which is again starting to awaken interest, following recent embodied, enactive critiques of computationalist frameworks. We offer here a very brief history of the concept of habit in the form of a genealogical network-map. This serves to provide an overview of the richness of this notion and as a guide for further re-appraisal. We identify 77 thinkers and their influences, and group them into seven schools of thought. Two major trends can be distinguished. One is the associationist trend, starting with the work of Locke and Hume, developed by Hartley, Bain, and Mill to be later absorbed into behaviorism through pioneering animal psychologists (Morgan and Thorndike). This tradition conceived of habits atomistically and as automatisms (a conception later debunked by cognitivism). Another historical trend we have called organicism inherits the legacy of Aristotle and develops along German idealism, French spiritualism, pragmatism, and phenomenology. It feeds into the work of continental psychologists in the early 20th century, influencing important figures such as Merleau-Ponty, Piaget, and Gibson. But it has not yet been taken up by mainstream cognitive neuroscience and psychology. Habits, in this tradition, are seen as ecological, self-organizing structures that relate to a web of predispositions and plastic dependencies both in the agent and in the environment. In addition, they are not conceptualized in opposition to rational, volitional processes, but as transversing a continuum from reflective to embodied intentionality. These are properties that make habit a particularly attractive idea for embodied, enactive perspectives, which can now re-evaluate it in light of dynamical systems theory and complexity research.

  18. A genealogical map of the concept of habit

    Directory of Open Access Journals (Sweden)

    Xabier E Barandiaran

    2014-07-01

    Full Text Available The notion of information processing has dominated the study of the mind for over six decades. However, before the advent of cognitivism, one of the most prominent theoretical ideas was that of Habit. This is a concept with a rich and complex history, which is again starting to awaken interest, following recent embodied, enactive critiques of computationalist frameworks. We offer here a very brief history of the concept of habit in the form of a genealogical network-map. This serves to provide an overview of the richness of this notion and as a guide for further re-appraisal. We identify 77 thinkers and their influences, and group them into seven schools of thought. Two major trends can be distinguished. One is the associationist trend, starting with the work of Locke and Hume, developed by Hartley, Bain and Mill to be later absorbed into behaviourism through pioneering animal psychologists (Morgan and Thorndike. This tradition conceived of habits atomistically and as automatisms (a conception later debunked by cognitivism. Another historical trend we have called organicism inherits the legacy of Aristotle and develops along German idealism, French spiritualism, pragmatism, and phenomenology. It feeds into the work of continental psychologists in the early 20th century, influencing important figures such as Merleau-Ponty, Piaget, and Gibson. But it has not yet been taken up by mainstream cognitive neuroscience and psychology. Habits, in this tradition, are seen as ecological, self-organizing structures that relate to a web of predispositions and plastic dependencies both in the agent and in the environment. In addition, they are not conceptualized in opposition to rational, volitional processes, but as transversing a continuum from reflective to embodied intentionality. These are properties that make habit a particularly attractive idea for embodied, enactive perspectives, which can now re-evaluate it in light of dynamical systems theory and

  19. Habitable zone lifetimes of exoplanets around main sequence stars.

    Science.gov (United States)

    Rushby, Andrew J; Claire, Mark W; Osborn, Hugh; Watson, Andrew J

    2013-09-01

    The potential habitability of newly discovered exoplanets is initially assessed by determining whether their orbits fall within the circumstellar habitable zone of their star. However, the habitable zone (HZ) is not static in time or space, and its boundaries migrate outward at a rate proportional to the increase in luminosity of a star undergoing stellar evolution, possibly including or excluding planets over the course of the star's main sequence lifetime. We describe the time that a planet spends within the HZ as its "habitable zone lifetime." The HZ lifetime of a planet has strong astrobiological implications and is especially important when considering the evolution of complex life, which is likely to require a longer residence time within the HZ. Here, we present results from a simple model built to investigate the evolution of the "classic" HZ over time, while also providing estimates for the evolution of stellar luminosity over time in order to develop a "hybrid" HZ model. These models return estimates for the HZ lifetimes of Earth and 7 confirmed HZ exoplanets and 27 unconfirmed Kepler candidates. The HZ lifetime for Earth ranges between 6.29 and 7.79×10⁹ years (Gyr). The 7 exoplanets fall in a range between ∼1 and 54.72 Gyr, while the 27 Kepler candidate planets' HZ lifetimes range between 0.43 and 18.8 Gyr. Our results show that exoplanet HD 85512b is no longer within the HZ, assuming it has an Earth analog atmosphere. The HZ lifetime should be considered in future models of planetary habitability as setting an upper limit on the lifetime of any potential exoplanetary biosphere, and also for identifying planets of high astrobiological potential for continued observational or modeling campaigns.

  20. A model of habitability within the Milky Way galaxy.

    Science.gov (United States)

    Gowanlock, M G; Patton, D R; McConnell, S M

    2011-11-01

    We present a model of the galactic habitable zone (GHZ), described in terms of the spatial and temporal dimensions of the Galaxy that may favor the development of complex life. The Milky Way galaxy was modeled using a computational approach by populating stars and their planetary systems on an individual basis by employing Monte Carlo methods. We began with well-established properties of the disk of the Milky Way, such as the stellar number density distribution, the initial mass function, the star formation history, and the metallicity gradient as a function of radial position and time. We varied some of these properties and created four models to test the sensitivity of our assumptions. To assess habitability on the galactic scale, we modeled supernova rates, planet formation, and the time required for complex life to evolve. Our study has improved on other literature on the GHZ by populating stars on an individual basis and modeling Type II supernova (SNII) and Type Ia supernova (SNIa) sterilizations by selecting their progenitors from within this preexisting stellar population. Furthermore, we considered habitability on tidally locked and non-tidally locked planets separately and studied habitability as a function of height above and below the galactic midplane. In the model that most accurately reproduces the properties of the Galaxy, the results indicate that an individual SNIa is ∼5.6× more lethal than an individual SNII on average. In addition, we predict that ∼1.2% of all stars host a planet that may have been capable of supporting complex life at some point in the history of the Galaxy. Of those stars with a habitable planet, ∼75% of planets are predicted to be in a tidally locked configuration with their host star. The majority of these planets that may support complex life are found toward the inner Galaxy, distributed within, and significantly above and below, the galactic midplane.

  1. Different healthy habits between northern and southern Spanish school children.

    Science.gov (United States)

    Arriscado, Daniel; Knox, Emily; Zabala, Mikel; Zurita-Ortega, Félix; Dalmau, Jose Maria; Muros, Jose Joaquin

    2017-01-01

    Healthy habits are influenced by several factors such as geographical location. The aims of this study were to describe and compare healthy habits within two populations of sixth-grade primary school children (aged 11-12 years) from northern and southern Spain. A cross-sectional study using two representative samples of school children was conducted. Participants came from Logroño (n = 329) in the north and Granada (n = 284) in the south of Spain. Socio-demographic and anthropometric variables, adherence to the Mediterranean diet, aerobic fitness, and healthy lifestyles were recorded. Boys reported a higher level of physical activity and aerobic fitness than girls (p = 0.000). Southern school children reported significantly higher adherence to the Mediterranean diet (♀: p = 0.041; ♂: p = 0.008), lower aerobic fitness (♀: p = 0.000; ♂: p = 0.042) and hours of nightly sleep (♀: p = 0.008, ♂: p = 0.007) than northern school children. Southern boys also reported lower levels of physical activity (p = 0.013). There were slight or moderate correlations among all habits measured (physical activity, diet, screen and sleep time). Additionally, the physical activity level was inversely related to weight status. Overweight and obese northern boys reported less physical activity than healthy-weight northern boys (p = 0.020) and overweight and obese southern girls reported less physical activity than healthy-weight southern girls (p = 0.024). Results showed differences in physical activity, eating and sleep habits, and aerobic fitness according to geographical location. The relationships found among lifestyle habits indicate the need for health promotion interventions nationally and considering the differences discussed here.

  2. A genealogical map of the concept of habit

    Science.gov (United States)

    Barandiaran, Xabier E.; Di Paolo, Ezequiel A.

    2014-01-01

    The notion of information processing has dominated the study of the mind for over six decades. However, before the advent of cognitivism, one of the most prominent theoretical ideas was that of Habit. This is a concept with a rich and complex history, which is again starting to awaken interest, following recent embodied, enactive critiques of computationalist frameworks. We offer here a very brief history of the concept of habit in the form of a genealogical network-map. This serves to provide an overview of the richness of this notion and as a guide for further re-appraisal. We identify 77 thinkers and their influences, and group them into seven schools of thought. Two major trends can be distinguished. One is the associationist trend, starting with the work of Locke and Hume, developed by Hartley, Bain, and Mill to be later absorbed into behaviorism through pioneering animal psychologists (Morgan and Thorndike). This tradition conceived of habits atomistically and as automatisms (a conception later debunked by cognitivism). Another historical trend we have called organicism inherits the legacy of Aristotle and develops along German idealism, French spiritualism, pragmatism, and phenomenology. It feeds into the work of continental psychologists in the early 20th century, influencing important figures such as Merleau-Ponty, Piaget, and Gibson. But it has not yet been taken up by mainstream cognitive neuroscience and psychology. Habits, in this tradition, are seen as ecological, self-organizing structures that relate to a web of predispositions and plastic dependencies both in the agent and in the environment. In addition, they are not conceptualized in opposition to rational, volitional processes, but as transversing a continuum from reflective to embodied intentionality. These are properties that make habit a particularly attractive idea for embodied, enactive perspectives, which can now re-evaluate it in light of dynamical systems theory and complexity research

  3. Statistical-likelihood Exo-Planetary Habitability Index (SEPHI)

    Science.gov (United States)

    Rodríguez-Mozos, J. M.; Moya, A.

    2017-11-01

    A new index, the Statistical-likelihood Exo-Planetary Habitability Index (SEPHI), is presented. It has been developed to cover the current and future features required for a classification scheme disentangling whether any exoplanet discovered is potentially habitable compared with life on Earth. SEPHI uses likelihood functions to estimate the habitability potential. It is defined as the geometric mean of four sub-indexes related to four comparison criteria: Is the planet telluric? Does it have an atmosphere dense enough and a gravity compatible with life? Does it have liquid water on its surface? Does it have a magnetic field shielding its surface from harmful radiation and stellar winds? SEPHI can be estimated with only seven physical characteristics: planetary mass, planetary radius, planetary orbital period, stellar mass, stellar radius, stellar effective temperature and planetary system age. We have applied SEPHI to all the planets in the Exoplanet Encyclopaedia using a Monte Carlo method. Kepler-1229b, Kepler-186f and Kepler-442b have the largest SEPHI values assuming certain physical descriptions. Kepler-1229b is the most unexpected planet in this privileged position since no previous study pointed to this planet as a potentially interesting and habitable one. In addition, most of the tidally locked Earth-like planets present a weak magnetic field, incompatible with habitability potential. We must stress that our results are linked to the physics used in this study. Any change in the physics used implies only an updating of the likelihood functions. We have developed a web application allowing the online estimation of SEPHI (http://sephi.azurewebsites.net/).

  4. The promotion of unhealthy habits in gay, lesbian, and straight intimate partnerships.

    Science.gov (United States)

    Reczek, Corinne

    2012-09-01

    Health habits are linked to nearly half of U.S. and British deaths annually. While a legacy of research suggests that marriage has important positive consequences for health habits, recent work emphasizes that intimate ties can also deter from healthy habits and promote unhealthy habits. However, few studies examine the mechanisms through which unhealthy habits are promoted in marriage. Moreover, little research explores how unhealthy habits are promoted in intimate ties other than marriage-such as in gay and lesbian cohabiting relationships. The present study analyzes the mechanisms through which gay, lesbian, and straight long-term partners (N = 120) contribute to one another's unhealthy habits. Three distinct mechanisms emerge. First, respondents identify a process of unilateral health habit diffusion wherein one partner's health habits directly influence the other partners' habits. Second, respondents describe bilateral unhealthy habit diffusion, wherein both partner's unhealthy habits are reinforced via mutual pleasure seeking or mutual failed motivation. Third, respondents describe a discourse of personal responsibility, wherein both partners purposefully fail to deter one another's unhealthy habits. Analysis further illustrates how these mechanisms operate differently for men and women in gay, lesbian, and straight relationships. Copyright © 2012 Elsevier Ltd. All rights reserved.

  5. Ontogenetic variations and feeding habits of a Neotropical annual fish from southern Brazil

    Directory of Open Access Journals (Sweden)

    Tatiana S. Dias

    Full Text Available ABSTRACT Knowing the feeding biology of a population and its ontogenetic aspects can help in understanding the functioning of fish assemblages, essential to the conservation of the habitat biodiversity in which these species are found. Annual fishes complete their life cycle in temporary aquatic environments, existing in adult stage only for brief annual periods. Changes in the feeding habits between different size classes could indicate that a species belongs to different feeding groups in different growth phases. The aim of this work was to characterize the diet of Cynopoecilus fulgens Costa, 2002 in a temporary flooded area in the coastal plain of southern Brazil, taking into consideration possible alterations in feeding habits in different body size classes caused by ontogenetic changes, to explain the coexistence of these individuals in a short space of time. The diet analysis indicated that C. fulgens is a generalist, consuming small crustaceans and autochthonous insects. Intraspecific differences in diet were determined when compared between nine classes of standard length. Adults fed mainly on autochthonous insects, and juveniles ingested mostly crustaceans, with the population being separated into two trophic groups: invertivores and invertivores with a tendency towards zooplanktivory. It is possible to conclude that the ontogenetic changes in the diet of C. fulgens are related to morphological restrictions due to the size of the individuals, since feeding competitive relations are probably not so evident.

  6. [Feeding habits of cichlid species (Perciformes: Cichlidae) in Caobas lake, Quintana Roo, Mexico].

    Science.gov (United States)

    Valtierra-Vega, M T; Schmitter-Soto, J J

    2000-01-01

    Feeding habits of seven cichlid species (Archocentrus octofasciatus, A. spilurus, "Cichlasoma" robertsoni, "C." synspilum, "C." urophthalmus, Petenia splendida, Thorichthys meeki) in Lake Caobas, southern Yucatan Peninsula, were studied. Samples were taken with enclosure and cast nets during the dry and rainy seasons of 1995 (day and night). The environment was characterized by measuring temperature, conductivity and pH. All individuals were below 41 mm SL (N = 281). Frequency of occurrence and prey abundance were analyzed. Main prey items were chironomids, mites, copepods, cladocerans, and ostracods. The cichlids fed mainly on zooplankton, with the partial exceptions of P. splendida (piscivore), "C." synspilum and A. spilurus (herbivores). A cluster analysis showed that the most similar trophic spectra were those of T. meeki, "C." robertsoni and "C." salvini, which were also the least diverse. "C." synspilum and A. spilurus had an intermediate distance between their diets and those of other species. The species with the most distinctive feeding composition were P. splendida (with the most diverse and equitable diet) and the omnivore A. octofasciatus (whose diet was the richest one). T. meeki showed quantitative diel, ontogenetic, and seasonal diet changes, but none between sexes. "C." robertsoni, "C." salvini and "C." synspilum differ in food habits in Caobas and in other localities, a fact that underscores the trophic adaptability of cichlids. Trophic overlap between cichlids in Caobas could imply absence of competition, perhaps because resources are abundant in the ecosystem.

  7. Oral hygiene habits and oral hygiene index of public school students

    Directory of Open Access Journals (Sweden)

    Adriano Pivotto

    2014-09-01

    Full Text Available Objective: To verify the oral hygiene habits and oral hygiene index of schoolchildren in public elementary school in the city of Itajaí-SC. Methods: Descriptive cross-sectional research. The sample consisted of children enrolled in the first year of elementary level in public schools of Itajaí-SC in 2011. Data collection was performed through registration of the children’s Simplified Oral Hygiene Index (OHI-S and a questionnaire applied to parents/guardians about the characterization of schoolstudent’s oral hygiene. Results: The study evaluated 202 schoolstudent. Regarding daily toothbrushing, 121 (59.9% reported that an adult is responsible for carrying out this procedure for the child and 81 (40.1% reported the own child performs brushing. Brushing frequency for 128 (63.4% children was three times a day and floss was not used by 137 (68% of them. In 114 (56.4% of the schoolchildren was found an OHI-S classified as reasonable hygiene (1.3 to 2. Regarding how to deal with the oral hygiene of children, 140 (69% parents stated having already received such information and the source cited by 118 (58.4% was the dentist. Conclusion: Schoolchildren presented oral hygiene habits with deficiency in dental plaque removal and flossing, resulting in a reasonable OHI-S. doi: http://dx.doi.org/10.5020/18061230.2013.p455

  8. The eating habits of Patients with Type 2 diabetes in Algeria.

    Science.gov (United States)

    Laissaoui, Aicha; Allem, Rachida

    2016-01-01

    To evaluate the eating habits and the practice of physical-activity of patients with Tyhpe-2 diabetes. (DT2). A total of 1523 patients DT2 with average age 58±9.9 were recruited. A questionnaire about their eating habits, physical activity was conducted. Data were analyzed using SPSS statistical. Most of the patients were obese (64%), with irregular and weak practice of the physical-activity. The patients based their consumption on food rich with nutrients of high glycaemic index. Their food was mainly characterized by high amounts of fats, the green salads and the desserts (fruits) represent only a secondary amount. Statistically, Overweight + obese patients with diabetes had significantly higher level of consumption of the bread. However, the normal weight patients with diabetes had significantly higher level of the consumption of fruit and vegetables (p=0.006 and p=0 respectively). On the other hand, there was no significant difference in level of the consumption of the greasy substances, milk and dairy products, meat-fish-egg two groups (p=0.53, p=0.06 and P > 0.05). This study showed the need for an improvement in the nutritional care of DT2 patients in the area of Ain Defla (Algeria), also, the practice of the physical-activity, in order to plan an adequate therapeutic care.

  9. Habitable Exoplanet Imaging Mission (HabEx): Architecture of the 4m Mission Concept

    Science.gov (United States)

    Kuan, Gary M.; Warfield, Keith R.; Mennesson, Bertrand; Kiessling, Alina; Stahl, H. Philip; Martin, Stefan; Shaklan, Stuart B.; amini, rashied

    2018-01-01

    The Habitable Exoplanet Imaging Mission (HabEx) study is tasked by NASA to develop a scientifically compelling and technologically feasible exoplanet direct imaging mission concept, with extensive general astrophysics capabilities, for the 2020 Decadal Survey in Astrophysics. The baseline architecture of this space-based observatory concept encompasses an unobscured 4m diameter aperture telescope flying in formation with a 72-meter diameter starshade occulter. This large aperture, ultra-stable observatory concept extends and enhances upon the legacy of the Hubble Space Telescope by allowing us to probe even fainter objects and peer deeper into the Universe in the same ultraviolet, visible, and near infrared wavelengths, and gives us the capability, for the first time, to image and characterize potentially habitable, Earth-sized exoplanets orbiting nearby stars. Revolutionary direct imaging of exoplanets will be undertaken using a high-contrast coronagraph and a starshade imager. General astrophysics science will be undertaken with two world-class instruments – a wide-field workhorse camera for imaging and multi-object grism spectroscopy, and a multi-object, multi-resolution ultraviolet spectrograph. This poster outlines the baseline architecture of the HabEx flagship mission concept.

  10. [Functional dyspepsia in students of eigth peruvians medical schools. Influence of the habits].

    Science.gov (United States)

    Vargas, Mariela; Talledo-Ulfe, Lincolth; Samaniego, Reimer O; Heredia, Paula; Rodríguez, Christian A S; Mogollón, César A; Enriquez, Walter F; Mejia, Christian R

    2016-06-01

    Functional dyspepsia impacts on quality of life. Due to its multifactorial etiology its characterization proves difficult, especially in populations at risk such as medical students. To determine if behavioral and harmful habits of medical students from eight universities of Peru were associated to functional dyspepsia. Multicentric, cross-sectional study. A self-administered questionnaire was taken among students enrolled in eight medical faculties in Peru. Functional dyspepsia was measured using a validated test; diet characteristics, alcohol, tobacco, coffee or energy drinks consumption were considered behavioral habits. Furthermore, others from the social and educational sphere were measured. Bivariate and multivariate statistical analyses were made. From a total of 1.923 students, the median of the ages was 20, 55% were women and 24% suffered from functional dyspepsia. Factors which diminished the frequency of functional dyspepsia were masculine gender (aPR:0,75; 95%CI:0.64-0.87; p eating following a fixed schedule (aPR:0,80; 95%CI:0,67- 0,95; p = 0,013); however, having failed a course increases the frequency of functional dyspepsia (aPR:1.24; 95%CI:1.13-1.37; p students suffered from functional dyspepsia, this being related to several behavioral variables; therefore further studies as well as educational institutions’ intervention is required, due to the short and long term problems that may arise from this situation.

  11. Food habits and risk of cardiovascular disease in schoolchildren from Ouro Preto, Minas Gerais

    Directory of Open Access Journals (Sweden)

    Lorene Gonçalves Coelho

    2015-04-01

    Full Text Available OBJECTIVE: To investigate the relationship between food habits and risk factors for cardiovascular disease in schoolchildren of the city Ouro Preto, Minas Gerais. METHODS: A cross-sectional study was conducted in a population-based sample of 738 schoolchildren aged 6-14 years. A semi-structured questionnaire was used for collecting demographic, socioeconomic, biochemical, clinical, and anthropometric data. Food intake was determined by a food-frequency questionnaire. Food habits were evaluated according to the adapted Recommended Food Score. Multiple linear regression models were constructed to assess how food consumption was associated with cardiovascular risk factors. RESULTS: The schoolchildren presented a dietary pattern characterized by low consumption of healthy foods. Association of cardiovascular risk factors showed that the consumption of foods according to the adapted Recommended Food Score was negatively and significantly associated with tetrapolar percentage of body fat (p=0.030 and systolic blood pressure (p=0.049 in children aged 6-9 years. CONCLUSION: Children's dietary patterns proved to be an important determinant of some of the cardiovascular risk factors studied. Thus, food intake assessment is a primary tool for the prevention and early intervention on cardiovascular risk factors during childhood.

  12. [Psychometric validation of the Spanish version of the scale properties Self-Report Habit Index (SRHI) measuring physical exercise habits].

    Science.gov (United States)

    Gutiérrez-Sánchez, Agueda; Pino-Juste, Margarita

    2011-08-01

    The measurement of physical activity habits is especially important in the evaluation of the consequences of chronic diseases. The study tries was to validate to the context Spanish the scale Self-Report Habit Index (SRHI) of 12 items for to measure the habit strength. The psychometric properties of SRHI were analyzed realizing a analysis statistical of the items, an factorial analysis and an estimation of the reliability coefficient via Cronbach alpha. A sample of 222 university students of first year was used. The majority of they has practiced some type of sport during his school stage. To assess the adequacy of sampling and possible sphericity of data obtained, both Kaiser-Meyer-Olkin (KMO) tests were performed (which resulted in 0.953) and Bartlett (which resulted in p=.000). The Cronbach alpha coefficient is 0.96. The results of a factor mining analysis (unrotated, orthogonal) point to a grouping of the 12 items into a single factor with eigenvalue of 8.342 and a percentage of total variance of 69.52%. Results show that the scale is valid and reliable to measure physical activity habits A clear similarity of the psychometric properties of the Spanish version of the original version SRHI is shown.

  13. Nutritional status and nutritional habits of men with benign prostatic hyperplasia or prostate cancer - preliminary investigation.

    Science.gov (United States)

    Goluch-Koniuszy, Zuzanna; Rygielska, Magda; Nowacka, Ilona

    2013-01-01

    The ageing in men, the most frequent pathologic lesions affecting the prostatic gland in this period are benign prostatic hyperplasia (BPH) and prostate cancer (PC), the course of which may be influenced by the improper nutritional status of patients and their nutritional habits. The aim of this study was, therefore, to evaluate the nutritional status and eating habits of men diagnosed and treated for one of the above diseases. MATERIAL AND METODS: The nutritional status of 30 male patients with clinically confirmed and treated disease of the prostatic gland, including 15 men (aged 51-75 years) with BPH and 15 men (aged 51-73 years) with PC, was evaluated based on their BMI, WC, WHR, and WHtR parameters. In turn, the energy and nutritive value of 90 daily food rations (DFRs) was evaluated. Finally, calculations were made for the Key's index of diet atherogenicity, resultant Glycemic Index (GI) and Glycemic Load (GL). Higher values of the BMI, WC, WHR and WHtR parameters were noted in the men with PC, they were also characterized by a higher incidence of peripheral subcutaneous obesity and visceral obesity. The DFRs of the men were characterized by a low energy value and by a low intake of available carbohydrates, dietary fi ber, K, Ca, Mg, vitamins D and C, and fl uids at a simultaneously high intake of total and animal protein, cholesterol, Na, P, Fe, Cu as well as vitamins B2 and PP. The contribution of energy derived from the basic nutrients diverged from the recommended values. In addition, the DFRs were characterized by high values of Key's index and 24-h GL. Differences in meeting the RDA for selected nutrients between the analysed groups of men were statistically significant. The improper nutritional status of the men may result from their incorrect nutritional habits which fail to improve their health status, and even predispose them to the development of some diet-dependent diseases. In view of that, both correction of diets of the surveyed men, as well as

  14. Deglaciation and the Evolution of Planetary Lake Habitability

    Science.gov (United States)

    Cabrol, N. A.; Grin, E. A.; Haberle, C.; Moersch, J. E.; Jacobsen, R. E.; Sommaruga, R.; Fleming, E.; Detweiler, A. M.; Echeverria, A.; Parro, V.; Blanco, Y.; Rivas, L.; Demergasso, C.; Bebout, L.; Chong, G.; Rose, K.; Smith, T.; Pedersen, L.; Lee, S.; Fong, T.; Wettergreen, D.; Tambley, C.

    2012-12-01

    The goal of the Planetary Lake Lander project (PLL) is to deploy an adaptive robotic lake lander in the Central Andes of Chile, where ice is melting at an accelerated rate. Deglaciation subjects lakes to interannual variability, raising questions about its impact on metabolic activity and biogeochemical cycles, lake habitat, ecosystem, and biodiversity. Documenting these questions contributes to a better understanding of the changes affecting Earth's glacial lake ecosystems, and may shed light on how life adapted during past deglaciations. From an astrobiological perspective, it brings new insights into the evolution of Mars habitability during comparable geological periods. Further, the robotic exploration of glacial lakes confronts us with challenges analogous to those that will be faced by future planetary missions to Titan's planetary seas. PLL, thus, bridges planets along an intertwined pathway where the study of one planet informs on the evolution of others and on the technological challenges associated with their exploration. During our field field campaign In November 2011, we characterized the physical, geological, and biological environment of Laguna Negra (33.65S -70.13W) a 6-km large, 300 m deep glacial lake, and generated an environmental database to baseline the adaptive system that will be used in the future by the lake lander to autonomously monitor the lake.Time series show changes in precipitation over the past decades, and in temperature and relative humidity. Meteorological stations and a stream gauge are tracking daily and seasonal changes at high resolution. Data are correlated to daily vertical profiles performed by the lake lander to monitor physico-chemical changes. Bathymetric maps reveal the bottom topography, and isolated habitats. Most dominant spectral units have been defined in ASTER near- and thermal infrared. They were sampled from spectra and hand specimens in the field and are now being characterized for mineralogic compositions

  15. The Origins Space Telescope: Tracing the Signatures of Life and the Ingredients of Habitable Worlds

    Science.gov (United States)

    Pontoppidan, Klaus Martin; Bergin, Edwin; Kaltenegger, Lisa; Milam, Stefanie N.; Sandstrom, Karin; Stevenson, Kevin; Origins Space Telescope Science and Technology Definition Team

    2018-01-01

    The Origins Space Telescope (OST) is the mission concept for the Far-Infrared Surveyor, one of the four science and technology definition studies of NASA Headquarters for the 2020 Astronomy and Astrophysics Decadal survey.Planet-hunting programs such as TRAPPIST, MEarth, and NASA's Kepler Space Observatory have confirmed the first Earth-sized planets orbiting within the habitable zones of their host stars. However, only once these planets' atmospheres have been characterized can their potential for supporting life be ascertained. Along with any detections of bio-relevant constituents of exoplanetary atmospheres, additional questions emerge. How are volatile elements - carbon, nitrogen, oxygen and the hydrogen in water - critical for life, delivered to habitable planets? This was an inefficient process for the Earth, but is it similarly difficult to deliver volatiles to Earth-sized planets in the habitable zone around other stars?The OST will have the power to reveal the formation, evolution and potential existence of biospheres, using the many unique tracers of water, organics and nitrogen-bearing species that dominate the infrared wavelength regions (5-600 micron). Using improved infrared detector stability and its large collecting area, OST will obtain infrared transmission and thermal emission spectra of transiting, potentially habitable, planets between 5.5-20 micron. This will allow for definitive measurements of atmospheric biosignatures and related species, such as CH4, O3, and CO2, and will measure planetary temperatures. An actively cooled, 4K telescope will vastly improve current sensitivities to far-infrared molecular lines by more than 3 orders of magnitude. OST will consequently be able to spectrally survey at least 1000 protoplanetary disks around stars down to the hydrogen-burning limit, map their content of water, and measure their total gas masses using HD as a tracer. Finally, OST will trace water back to its origin in the dense interstellar

  16. Association between exercise habits and subcortical gray matter volumes in healthy elderly people: A population-based study in Japan

    Directory of Open Access Journals (Sweden)

    Mikie Yamamoto

    2017-06-01

    Conclusion: Subjects with exercise habits show larger subcortical gray matter volumes than subjects without exercise habits in community-dwelling elderly subjects in Japan. Specifically, the volume of the nucleus accumbens correlates with both exercise habits and cognitive preservation.

  17. Effects of Early-Life Stress on Actions, Habits, and the Neural Systems Supporting Instrumental Behavior

    OpenAIRE

    Patterson, Tara

    2017-01-01

    Factors contributing to the formation of habits, defined as the stimulus-response associations that form the basis of much human and animal behavior, are not well understood, and although habits are believed to underlie many negative health behaviors such as addictions, the extent to which findings from animal research on habits apply in the human is largely unknown. In Study 1 (Chapter 2), we conducted two experiments on appetitive habit formation in adults with a history of early-life stres...

  18. Scientific habits of mind: A reform of structure and relationships

    Science.gov (United States)

    Mooney, Linda Beth

    This research was designed to broaden current elementary science reform efforts by including the voices of our young scientists. Ten high school students who were defined as possessing both coherent science knowledge and scientific habits of mind were selected for the study. Through a three-part series of in-depth, phenomenological interviews, these students revealed early childhood experiences from birth through age ten to which they attributed their development of science knowledge and scientific habits of mind. Educational connoisseurship and criticism provided the framework through which the experiences were analyzed. The research revealed the overwhelming role of scientific habits of mind in the current success of these young scientists. Scientific habits of mind were developed through the structures and relationships in the home. Parents of the participants provided a non-authoritarian, fun, playful, tolerant atmosphere in which messes and experimentation were the norm. Large blocks of uninterrupted, unstructured time and space that "belonged" to the child allowed these children to follow where curiosity led. Frequently, the parent modeled scientific habits of mind. Good discipline in the minds of these families had nothing to do with punishments, rewards, or rules. The parents gave the children responsibilities, "free rein," and their trust, and the children blossomed in that trust and mutual respect. Parents recognized and supported the uniqueness, autonomy, interests, and emotions of the child. Above all, the young scientists valued the time, freedom, patience, and emotional support provided by their parents. For girls, construction toys, hot wheels, sand boxes, and outdoor experiences were particularly important. Art classes, free access to art media, sewing, music, and physical activity facilitated observational skills and spatial relationship development. The girls knew that doing traditionally masculine and feminine activities were acceptable and

  19. What determines video game use? The impact of users’ habits, addictive tendencies, and intentions to play

    NARCIS (Netherlands)

    Hartmann, T.; Jung, Y.; Vorderer, P.A.

    2012-01-01

    The present study explores the role of intentions, habits, and addictive tendencies in people’s video game use. Although both habits and addictive tendencies may determine higher amounts of video game use, the present study examines whether the impact of habits and addictive tendencies on video game

  20. Using implicit associations towards fruit consumption to understand fruit consumption behaviour and habit strength relationships

    NARCIS (Netherlands)

    de Bruijn, G.-J.; Keer, M.; Conner, M.; Rhodes, R.

    2012-01-01

    An implicit association test (IAT) was used to investigate how habit strength, implicit attitudes and fruit consumption interrelate. Fifty-two participants completed a computerized IAT and provided measures of fruit consumption and related habit strength. Implicit attitudes moderated the habit

  1. The importance of habits in eating behaviour: an overview and recommendations for future research

    NARCIS (Netherlands)

    van 't Riet, J.; Sijtsema, S.J.; Dagevos, H.; de Bruijn, G.-J.

    2011-01-01

    There is ample evidence to suggest that a significant part of daily eating behaviours consists of habits. In line with this, the concept of habit is increasingly incorporated into studies investigating the behavioural and psychosocial determinants of food choice, yielding evidence that habit is one

  2. EFFECTS OF AN INTERVENTION PROGRAM (HHP) ON THE PROMOTION OF HEALTHY HABITS IN EARLY ADOLESCENCE.

    Science.gov (United States)

    Nebot Paradells, Vicente; Pablos Monzó, Ana; Elvira Macagno, Laura; Guzmán Luján, José Francisco; Pablos Abella, Carlos

    2015-12-01

    it is vital to monitor and promote healthy lifestyle habits in early adolescence, as it is a time of changes when future lifestyle habits are formed. a study was conducted to find out the effects of a Healthy Habits Program (HHP) in children between the ages of 10 and 12 years (N = 158). The study included an intervention group (IG) (n = 90), which participated in the HHP for 8 months, and a control group (CG) (n = 100). In order to assess healthy habits in these children we used the Inventory of Healthy Habits (IHH), the reliability of which was previously evaluated (N = 134). the IHH obtained good reliability, Interclass Correlation Coefficient (range .506 - 884; p habits initially (p = .564), but by the end of the study (p = .001) the IG showed better habits. As for the other healthy habits indicators, the CG had better habits initially (p = .047), but the score of the IG improved and there were no differences between the groups at the end of the study. it was shown that the IHH is a suitable and reliable questionnaire for studying habits in adolescents. The HHP brought about changes in the IG, which achieved better scores for eating habits and sum of health habits. Copyright AULA MEDICA EDICIONES 2014. Published by AULA MEDICA. All rights reserved.

  3. Uncovering Reading Habits of University Students in Uganda: Does ICT Matter?

    Science.gov (United States)

    Mlay, Samali V.; Sabi, Humphrey M.; Tsuma, Clive K.; Langmia, Kehbuma

    2015-01-01

    This paper investigates how Information and Communication Technology (ICT) can improve reading habits among university students. We also investigated the influence of home culture, school culture and disposable income on reading habit. Our main objective was to assess the effect of ICT on the reading habit of particularly university students in…

  4. What determines video game use? The impact of users’ habits, addictive tendencies, and intentions to play

    NARCIS (Netherlands)

    Hartmann, T.; Jung, Y.; Vorderer, P.A.

    2012-01-01

    The present study explores the role of intentions, habits, and addictive tendencies in people's video game use. Although both habits and addictive tendencies may determine higher amounts of video game use, the present study examines whether the impact of habits and addictive tendencies on video game

  5. A Study of the Reading Habits of Students in Selected Secondary ...

    African Journals Online (AJOL)

    This paper focused on the reading habits of students in four selected secondary schools in Oyo town. The study was designed to find out the difference in the reading habits of the students in selected secondary schools in Oyo town. It is also aimed at finding solutions to poor reading habits, among the students. A survey ...

  6. The importance of habits in eating behaviour: An overview and recommendations for future research

    NARCIS (Netherlands)

    Riet, J.P. van 't; Sijtsema, S.J.; Dagevos, H.; Bruijn, G.J. de

    2011-01-01

    There is ample evidence to suggest that a significant part of daily eating behaviours consists of habits. In line with this, the concept of habit is increasingly incorporated into studies investigating the behavioural and psychosocial determinants of food choice, yielding evidence that habit is one

  7. The importance of habits in eating behaviour: an overview and recommendations for future research.

    NARCIS (Netherlands)

    Riet, van 't J.P.; Sijtsema, S.J.; Dagevos, H.

    2011-01-01

    There is ample evidence to suggest that a significant part of daily eating behaviours consists of habits. In line with this, the concept of habit is increasingly incorporated into studies investigating the behavioural and psychosocial determinants of food choice, yielding evidence that habit is one

  8. Atmospheric escape from the TRAPPIST-1 planets and implications for habitability.

    Science.gov (United States)

    Dong, Chuanfei; Jin, Meng; Lingam, Manasvi; Airapetian, Vladimir S; Ma, Yingjuan; van der Holst, Bart

    2018-01-09

    The presence of an atmosphere over sufficiently long timescales is widely perceived as one of the most prominent criteria associated with planetary surface habitability. We address the crucial question of whether the seven Earth-sized planets transiting the recently discovered ultracool dwarf star TRAPPIST-1 are capable of retaining their atmospheres. To this effect, we carry out numerical simulations to characterize the stellar wind of TRAPPIST-1 and the atmospheric ion escape rates for all of the seven planets. We also estimate the escape rates analytically and demonstrate that they are in good agreement with the numerical results. We conclude that the outer planets of the TRAPPIST-1 system are capable of retaining their atmospheres over billion-year timescales. The consequences arising from our results are also explored in the context of abiogenesis, biodiversity, and searches for future exoplanets. In light of the many unknowns and assumptions involved, we recommend that these conclusions must be interpreted with due caution.

  9. On the inclination and habitability of the HD 10180 system

    Energy Technology Data Exchange (ETDEWEB)

    Kane, Stephen R. [Department of Physics and Astronomy, San Francisco State University, 1600 Holloway Avenue, San Francisco, CA 94132 (United States); Gelino, Dawn M., E-mail: skane@sfsu.edu [NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125 (United States)

    2014-09-10

    There are numerous multi-planet systems that have now been detected via a variety of techniques. These systems exhibit a range of both planetary properties and orbital configurations. For those systems without detected planetary transits, a significant unknown factor is the orbital inclination. This produces an uncertainty in the mass of the planets and their related properties, such as atmospheric scale height. Here we investigate the HD 10180 system, which was discovered using the radial velocity technique. We provide a new orbital solution for the system which allows for eccentric orbits for all planets. We show how the inclination of the system affects the mass/radius properties of the planets and how the detection of phase signatures may resolve the inclination ambiguity. We finally evaluate the Habitable Zone properties of the system and show that the g planet spends 100% of an eccentric orbit within the Habitable Zone.

  10. FOOD HABIT AMONG ELEMENTARY SCHOOL CHILDREN IN URBAN BOGOR

    Directory of Open Access Journals (Sweden)

    Evy Damayanthi

    2012-03-01

    Full Text Available 800x600 Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} Food habit strongly predicts individual nutritional status. It is largely influenced by family food habit and family socioeconomic, partly by nutrition education learning in the school.  Objectives of this study were to analyze elementary school children eating habit and examine whether it relates to family socioeconomic and nutritional status. One hundred elementary school children, and their mother, from one school in urban Bogor were chosen purposively according to SIBERMAS Program criteria (i.e. grade 4th and 5th, morning school, having UKS program and not having canteen. Self administered, structured pre-coded questionnaire were used to collect the data. Nutritional status was assessed using weight and height, and body mass index for age (BAZ and height for age (HAZ were then calculated using AnthroPlus software developed by WHO (2009. School children were 8-11 years old (mean 9.37 + 0.66 years, more girls (54%, and mostly had normal nutritional status using both indexes (72% for BAZ and 95% for HAZ. School children were commonly from middle class as indicated by father education (sarjana and mother (senior high school.  Almost all school children (99% knew breakfast was important and 81% of them ate breakfast. Only 32% school children brought lunch box everyday although 92% stated their habit to bring lunch box to school. Buying snack in school was also common among school children. Generally school children ate rice 3 times a day (2.95 + 0.97 with fish, meat, chicken (2.47 + 1.14, tempe and

  11. Fluid Expulsion, Habitability, and the Search for Life on Mars

    Science.gov (United States)

    Oehler, Dorothy Z.; Allen, Carlton C.

    2012-01-01

    Habitability assessments are critical for identifying settings in which potential biosignatures could exist in quantities large enough to be detected by rovers. Habitability depends on 1) the potential for long-lived liquid water, 2) conditions affording protection from surface processes destructive to organic biomolecules, and 3) a source of renewing nutrients and energy. Of these criteria, the latter is often overlooked. Here we present an analysis of a large "ghost" crater in northern Chryse Planitia [1] that appears to have satisfied each of these requirements, with several processes providing potential sources of nutrient/energy renewal [1-2]. This analysis can serve as a model for identifying other localities that could provide similarly favorable settings in which to seek evidence of life on Mars.

  12. Understanding the Reading Habits of Children in Singapore

    Directory of Open Access Journals (Sweden)

    Shaheen Majid

    2007-12-01

    Full Text Available Leisure reading contributes significantly to improving language competencies of children. This study investigates the reading habits and preferences of children, motivations behind reading, and their attitudes towards reading. A pre-tested questionnaire was used for collecting data and 440 upper primary students participated in the study. The findings suggest that a majority of the participating students were motivated to read for academically-related reasons, such as to improve language skills and to obtain better grades in examinations. Reading was the third most preferred leisure activity after hobbies and playing on computer or the Internet. It was also found that girls were generally more avid readers than boys. This paper offers certain suggestions for promoting reading habits among children.

  13. Developing occupational therapy students' practice habits via qualitative inquiry education.

    Science.gov (United States)

    Marterella, Abbey L; Aldrich, Rebecca M

    2015-04-01

    Accreditation standards and practice competencies underscore the importance of research for occupational therapy practice, but they do not guide how occupational therapy education addresses research. Despite the prominence of qualitative research in the health professions, there exists a need to articulate how and why qualitative inquiry is taught in occupational therapy education. We discuss how qualitative inquiry education can develop habits of reflection and reflexivity, criticality, and active engagement in preparation for occupational therapy practice. We hold that our students' professional abilities to practice in a well-reasoned, ethical, and responsive manner are enhanced by experiences with qualitative inquiry and suggest that there is potential in linking qualitative inquiry experiences to professional habit formation in occupational therapy education. In addition to teaching research for its own sake, we suggest that educators can adopt a broader view of how qualitative inquiry functions within occupational therapy education.

  14. Habitability of extrasolar planets and tidal spin evolution.

    Science.gov (United States)

    Heller, René; Barnes, Rory; Leconte, Jérémy

    2011-12-01

    Stellar radiation has conservatively been used as the key constraint to planetary habitability. We review here the effects of tides, exerted by the host star on the planet, on the evolution of the planetary spin. Tides initially drive the rotation period and the orientation of the rotation axis into an equilibrium state but do not necessarily lead to synchronous rotation. As tides also circularize the orbit, eventually the rotation period does equal the orbital period and one hemisphere will be permanently irradiated by the star. Furthermore, the rotational axis will become perpendicular to the orbit, i.e. the planetary surface will not experience seasonal variations of the insolation. We illustrate here how tides alter the spins of planets in the traditional habitable zone. As an example, we show that, neglecting perturbations due to other companions, the Super-Earth Gl581d performs two rotations per orbit and that any primordial obliquity has been eroded.

  15. Emergence of Architectural Phenomena in the Human Habitation of Space

    Science.gov (United States)

    Collen, Arne

    Considering the impact on human beings and human activities of architectural decisions in the design of space for human habitation, this chapter discusses the increasingly evident and necessary confluence in contemporary times of many disciplines and human-oriented sciences, with architecture being the meeting ground to know emergent phenomena of human habitation. As both a general rubric and a specific phenomenon, architectural emergence is the chosen focus of discussion and other phenomena are related to it. Attention is given to the phenomena of architectural induction, emergence, and convergence as having strategic and explanatory value in understanding tensions between two competing mentalities, the global domineering nature-for-humans attitude, in opposition to the lesser practiced humans-for-nature attitude.

  16. Wearable Eating Habit Sensing System Using Internal Body Sound

    Science.gov (United States)

    Shuzo, Masaki; Komori, Shintaro; Takashima, Tomoko; Lopez, Guillaume; Tatsuta, Seiji; Yanagimoto, Shintaro; Warisawa, Shin'ichi; Delaunay, Jean-Jacques; Yamada, Ichiro

    Continuous monitoring of eating habits could be useful in preventing lifestyle diseases such as metabolic syndrome. Conventional methods consist of self-reporting and calculating mastication frequency based on the myoelectric potential of the masseter muscle. Both these methods are significant burdens for the user. We developed a non-invasive, wearable sensing system that can record eating habits over a long period of time in daily life. Our sensing system is composed of two bone conduction microphones placed in the ears that send internal body sound data to a portable IC recorder. Applying frequency spectrum analysis on the collected sound data, we could not only count the number of mastications during eating, but also accurately differentiate between eating, drinking, and speaking activities. This information can be used to evaluate the regularity of meals. Moreover, we were able to analyze sound features to classify the types of foods eaten by food texture.

  17. Analysis of the relationship between food habits and health students

    Directory of Open Access Journals (Sweden)

    Podrigalo L.V.

    2012-11-01

    Full Text Available The article analyzes nutrition of students, based on the assessment of frequency of consumption of basic food products. The study involved 50 students aged 21-22 years. Set that the nutrition of the majority of students is irrational, in the daily life of young people there is a number of risk factors associated with inadequate intake of healthy food products. Have far-reaching enough food habits due to the consumption of so-called "food waste". The analysis of the correlation relationship between nutrition, mental performance and lifestyle factors, confirmed that a violation of the rules of a healthy diet affects the performance efficiency, increases the likelihood of bad habits. Slow food culture, lack of knowledge of young people on healthy food cause the need for appropriate health education.

  18. Preliminary studies on some aspects of Kikuyu food habits

    OpenAIRE

    Hoorweg, J.C.; Niemeijer, R.

    1980-01-01

    Description of a research project. The studies cover general aspects of Kikuyu food habits such as foods presently in use, the classification of foods and food preferences for children. The emphasises is on the methods employed in these studies which can also be used elsewhere to obtain information vital to the evaluation and planning of child nutrition programmes. A discussion on foods used by the Kikuyu in the rural areas is accompanied by a list of food names in the vernacular

  19. Dietary habits and gastroesophageal reflux disease in preschool children.

    Science.gov (United States)

    Choi, You Jin; Ha, Eun Kyo; Jeong, Su Jin

    2016-07-01

    To identify the relationship between dietary habits and childhood gastroesophageal reflux disease (GERD) in preschool children. We performed a questionnaire study to analyze the relationship between dietary habits and GERD in 85 preschool children with GERD and 117 healthy children of the same age. Irregular and picky eating were more p-revalent in the GERD group than in the control group (odds ratio [OR], 4.14; 95% confidence interval [CI], 1.37-12.54 and OR, 4.96; 95% CI, 1.88-13.14, respectively). The snack preferences and the late night eating habits were significantly more prevalent in the GERD group than in the control group (OR, 3.83; 95% CI, 1.23-11.87 and OR, 9.51; 95% CI, 2.55-35.49, respectively). A preference for liquid foods was significantly more prevalent in the GERD group (OR, 9.51; 95% CI, 2.548-35.485). The dinner-to-bedtime interval was significantly shorter in the GERD group than in the control group (157.06±48.47 vs. 174.62±55.10, P=0.020). In addition, the time between dinner and bedtime was shorter than 3 hours in 47 children (55.3%) of the GERD group and 44 (37.6%) of the control group. This difference was statistical significance (P=0.015). Dietary habits such as picky and irregular eating, snack preference, a preference of liquid foods, late night eating, and a shorter dinner-to-bedtime interval had a significant correlation with GERD. Further large-scale studies are necessary to confirm our results.

  20. WATER CONSUMPTION HABITS OF FAMILIES IN CONSUMER SOCIETY

    OpenAIRE

    ÖZCAN, Ayşegül; ŞERMET-KAYA, Şenay; ÖZDİL, Kamuran; SEZER, Fatma

    2017-01-01

    AbstractIntroductionand Objective: To meet water needs of families, it is important to know the kind ofwater they use, their usage reasons and storage conditions, to raise awareness ofthe community and individuals about the water usage habits in terms of directingwater policy. So, this research was  planned to determine the water consumptionhabits of families.Materialand Method: The universeconsisted of the families living in seven districts in the center of the AvanosDistrict, Nevşe...

  1. Sleep habits, academic performance, and the adolescent brain structure

    OpenAIRE

    Urrila, Anna S.; Eric Artiges; Jessica Massicotte; Ruben Miranda; Hélène Vulser; Pauline Bézivin-Frere; Winok Lapidaire; Hervé Lemaître; Jani Penttilä; Conrod, Patricia J.; Hugh Garavan; Marie-Laure Paillère Martinot; Jean-Luc Martinot

    2017-01-01

    Here we report the first and most robust evidence about how sleep habits are associated with regional brain grey matter volumes and school grade average in early adolescence. Shorter time in bed during weekdays, and later weekend sleeping hours correlate with smaller brain grey matter volumes in frontal, anterior cingulate, and precuneus cortex regions. Poor school grade average associates with later weekend bedtime and smaller grey matter volumes in medial brain regions. The medial prefronta...

  2. Bringing Habits and Emotions into Food Waste Behaviour

    OpenAIRE

    Russell, SV; Young, CW; Unsworth, KL; Robinson, C.

    2017-01-01

    This study examined consumer food waste behaviour using a comprehensive model integrating the theory of planned behaviour (TPB), the theory of interpersonal behaviour, and the comprehensive model of environmental behaviour. Using a temporally lagged design, one hundred and seventy-two respondents answered four questionnaires over a period of 14 months. Questionnaires measured emotions in relation to food waste, habits, the TPB variables, intention to reduce food waste, and self-reported food ...

  3. Developing Students' Writing Skill by Diary Writing Habit

    OpenAIRE

    Putri, Fatima A; Salatar, Bery; Susanto, Susanto

    2015-01-01

    Writing is a process of expressing feelings, thoughts, and ideas in the form of graphic language and it is one of English skills that should be mastered by the English language learners (Harmer, 2004; Meyers, 2005). To develop and improve students' writing skill, diary can be used as one of teaching media (Ningrum, Rita & Hastini, 2013). The paper presents a pleliminary study on developing the writing skill of the students by diary writing habit. The participants in the research are the ...

  4. Assessment of healthy lifestyle habits among Mosul university students

    OpenAIRE

    Nasir Younis

    2014-01-01

    Background: A healthy lifestyle leaves you fit, energetic and at reduced risk for disease, based on the choices you make about your daily habits. Good nutrition, daily exercise and adequate sleep are the foundations for continuing good health. Managing stress in positive ways, instead of through smoking or drinking alcohol, reduces wear and tear on your body at the hormonal level. For a longer and more comfortable life, put together your plan for a healthy lifestyle and live up to it. Objec...

  5. Dietary Habits Are Associated With School Performance in Adolescents

    OpenAIRE

    Kim, So Young; Sim, Songyong; Park, Bumjung; Kong, Il Gyu; Kim, Jin-Hwan; Choi, Hyo Geun

    2016-01-01

    Abstract Several studies suggest that dietary habits are associated with poor academic performance. However, few studies have evaluated these relations after adjusting for numerous confounding factors. This study evaluated the frequency of various diet items (fruit, soft drinks, fast foods, instant noodles, confections, vegetables, and milk) and the regularity of meal times (breakfast, lunch, and dinner) all at once. A total of 359,264 participants aged from 12 to 18 years old were pooled fro...

  6. Heat-Driven Fan for Tent Habitability Improvement

    Science.gov (United States)

    1982-11-01

    are in the coldest part of the tent. The habitability of the tent is marginal even though the average tent temperature is in the confortable range...operte ithabout 75% efficiency, and cost $40 to $80 each. One must be careful not to makethehea-drvenfan too expensive, however. A non-essential item such...variables which could be optimized. An intensive investigation of fan blade design could result in a design with more airflow, using less power, yielding

  7. Health Habits and Coping Behaviors Among Practicing Physicians

    OpenAIRE

    Linn, Lawrence S.; Cope, Dennis; Leake, Barbara; YAGER, JOEL

    1986-01-01

    Practicing physicians on the full-time academic and clinical (volunteer) faculty of an urban university department of medicine (N = 211) completed questionnaires that examined their coping behaviors, health habits, life satisfaction, job stress, conflict between work and home life, health status and moods. Attempts to organize and restructure work activities were more frequently practiced by physicians who were more satisfied with work. Socializing, exercising and discussing feelings with oth...

  8. Dietary and lifestyle habits amongst adolescents in Bahrain

    Directory of Open Access Journals (Sweden)

    Khaldoon Al-Roomi

    2011-09-01

    Full Text Available Changes in dietary habits and lifestyle are considered the main factors associated with several diet-related diseases in the Arab Gulf countries. The aim of this study was, therefore, to describe the dietary and lifestyle habits amongst adolescents in Bahrain. A cross-sectional study was carried out amongst male and female secondary school students selected using the multi-stage stratified random sampling technique. A sample size of 735 subjects (339 males and 396 females, aged 15–18 years, was selected from government schools from all the governorates of Bahrain. Skipping breakfast was significantly greater in females (62.8% compared to males (37.2%, (P<0.01. About 88% of adolescents snacked during school break, 70.7% procuring food from the school canteen. Fruit was not consumed by about 27.7% of respondents (33.5% males, 66.5% females and the gender difference was statistically significant (P<0.01. Fish and lentils were less preferred, while chicken was more popular. There was no significant difference between gender and frequency of eating fast food. About 8.4% of respondents reported not eating burgers, with 68.8% preferring regular size burgers. Furthermore, 24.4% preferred large portions of potato chips (53.1% male, 46.9% female. About 29.8% watched TV for more than 5 hours a day (51.2% females, 48.8% males. About 69% of males practiced sports everyday as against 30.8% of females (P<0.01 and 81.6% of those who participated in sport activity outside school were males compared to 18.4% of females. It seems that the adolescents in Bahrain are moving toward unhealthy dietary habits and lifestyles, which in turn will affect their health status in the future. Promoting healthy lifestyle and eating habits should be given a priority in school health programs.

  9. Reading Habits of the College Students across Discipline

    OpenAIRE

    Loan, Fayaz Ahmad

    2011-01-01

    From last century, many researchers have devoted efforts to examine reading habits of students. The present study is a step forward in the process which aims to identify the reading preferences and tastes of the college students across disciplines. The scope of the study is limited to the degree college students of Kashmir covering the faculties of General Science, Business/ Commerce, Computer Science, Social Sciences and Humanities. The sample was selected through statistical sampling formul...

  10. Reproductive biology and feeding habits of the catfish Clarias ...

    African Journals Online (AJOL)

    C. gariepinus was found to be carnivorous in its feeding habit and fish was the most important food item. It contributed 81.7% of the food items of the juveniles and 86.8% of the food of the adults by volume. A cichlid fish (Oreochromis niloticus) was the most utilized prey of C. gariepinus. O. niloticus accounted for 71.0% of the ...

  11. Studying the Formation, Evolution, and Habitability of the Galilean Satellites

    Science.gov (United States)

    McGrath, M.; Waite, J. H. Jr.; Brockwell, T.; McKinnon, W.; Wyrick, D.; Mousis, O.; Magee, B.

    2013-01-01

    Highly sensitive, high-mass resolution mass spectrometry is an important in situ tool for the study of solar system bodies. In this talk we detail the science objectives, develop the rationale for the measurement requirements, and describe potential instrument/mission methodologies for studying the formation, evolution, and habitability of the Galilean satellites. We emphasize our studies of Ganymede and Europa as described in our instrument proposals for the recently selected JUICE mission and the proposed Europa Clipper mission.

  12. Dietary Habits Are Associated With School Performance in Adolescents.

    Science.gov (United States)

    Kim, So Young; Sim, Songyong; Park, Bumjung; Kong, Il Gyu; Kim, Jin-Hwan; Choi, Hyo Geun

    2016-03-01

    Several studies suggest that dietary habits are associated with poor academic performance. However, few studies have evaluated these relations after adjusting for numerous confounding factors. This study evaluated the frequency of various diet items (fruit, soft drinks, fast foods, instant noodles, confections, vegetables, and milk) and the regularity of meal times (breakfast, lunch, and dinner) all at once.A total of 359,264 participants aged from 12 to 18 years old were pooled from the Korea Youth Risk Behavior Web-based Survey (KYRBWS) for the 2009 to 2013 period. Dietary habits over the last 7 days were surveyed, including the regularity of consuming breakfast, lunch and dinner and the frequency of eating fruits, soft drinks, fast foods, instant noodles, confections, vegetables, and milk. Physical activity, obesity, region of residence, subjective assessment of health, stress level, economic level, and parental education level were collected from all of the study participants. School performance was classified into 5 levels. The adjusted odds ratios (AORs) of dietary habits for school performance were analyzed using multinomial logistic regression analyses with complex sampling. Structural equation modeling was used to analyze the effects of diet factors on school performance while considering the effects of other variables on both diet factors and school performance.Frequent intakes of breakfast (AOR = 2.34, 95% confidence interval [CI] = 2.20-2.48), fruits (AOR = 1.73, 95% CI = 1.62-1.86), vegetables (AOR = 1.48, 95% CI = 1.37-1.61), and milk (AOR = 1.35, 95% CI = 1.28-1.43) were related to high levels of school performance (each with P performance (each with P performance and dietary habits that find a positive association with eating breakfast and consuming fruits and milk and a negative relation with soft drinks, instant noodles, fast foods, and confections.

  13. Anthropometric measures, eating habits and performance of Portuguese soccer players

    OpenAIRE

    Mota, Adriana; Mendes, Sandrina; Fernandes, António; Souza, Juliana de

    2014-01-01

    Introduction: According to the literature, anthropometric and physiological variables may be a determinant success factor for the players’ performance. Objective: Verify the in:fuence of anthropometric mea- sures on player's performance. Verify the in:fuence of eat- ing habits on player’s performance. Methods: A cross-sectional, quantitative, observational and analytical study was developed. A sample of 87 Soccer Players from Superliga (Portuguese Football League) was collected. Ant...

  14. Dietary habits among persons hired on shift work

    Directory of Open Access Journals (Sweden)

    Joanna Strzemecka

    2014-03-01

    Full Text Available Introduction. Shift-work determinates irregular nutrition habits. The quality as well as the quantity of meals consumed by shift-workers can significantly affects their health. Objective. The aim of this study was to evaluate the dietary habits of people performing shift work in the Bogdanka mine. Material and Methods. The study was carried out in the Bogdanka mine in Leczna. The questionnaire, which was designed by the author of this dissertation, was conducted among 700 shift-workers, working underground. The results were subjected to statistical analysis based on STATISTICA v. 7.1 (StatSoft, Poland software. Results. Nearly half of respondents reported regular consumption of meals (40.0% Interviewees admitted having warm meals during the day (81.4%. The most frequently consumed meal during the day was the hot one (50.9%, three meals and more were consumed the least frequently (8.1%. Almost half of respondents considered their eating habits as inappropriate (46.3%. Among those, nearly half (68.2% stated that shift – work is the reason for their nutrition habits. More than half of respondents (66.0% admitted that shift work hampers regular consumption of meals. Conclusions. Shift work makes nourishment and regular consumption difficult. It contributes to the limited amount of warm meals eaten during the day. In order to maintain preventive health care and the improvement of quality of life, shift workers should be provided with an easier access to meals (including warm one at specified times of the day.

  15. The Habitability of Basaltic Hydrovolcanic Tuffs: Implications for Mars

    Science.gov (United States)

    Nikitczuk, M. P. C.; Schmidt, M. E.; Flemming, R. L.

    2014-12-01

    Reed and South Reed Rock are two hydrovolcanic tuff ring deposits in the Fort Rock Volcanic Field (FRVF), Oregon, where microbial ichnofossils (endolithic microbores) exist within basaltic glass pyroclasts. Their presence indicates that continental volcanic settings can provide a habitable environment. The secondary phase assemblage of smectite clays (nontronite), zeolites (chabazite), calcite and palagonite point to a contemporaneous to post depositional hydrothermal alteration temperature range (~25-120°C), below which microbes introduced through groundwater were able to inhabit. Electron Dispersive Spectroscopy reveals geochemical differences between fresh glass and microbore interiors (eg., Fe, Mg depletion and K and Ca enrichment). These differences are interpreted to reflect acquisition by microbes of nutrients and energy by oxidizing and dissolving fresh basaltic glass. The Black Hills, a second study area located 20 km south the Reed Rocks, consists of a series of at least 6 hydrovolcanic vents. Petrographic observations from the Black Hills also reveal microbial ichnofossil features within basaltic glass pyroclasts. Conditions necessary for a habitable environment may therefore be common throughout the FRVF. In both locations, eruptive, depositional, and hydrothermal processes led to an environment conducive to microbial activity in which glass-rich deposits possess a source of biogenic elements, energy, and water. The histories of these deposits however, may be quite different in terms of peak hydrothermal temperatures, age relationships, water content and timing. Comparison of the textural, mineralogical and geochemical properties of the Reed Rocks and Black Hills deposits is ongoing in order to gain a better understanding of the conditions of habitability in these types of deposits. These results have important astrobiological implications for Mars where basaltic pyroclastic materials are widely distributed and may represent a habitable environment.

  16. Delivery of Volatiles to Habitable Planets in Extrasolar Planetary Systems

    Science.gov (United States)

    Chambers, John E.; Kress, Monika E.; Bell, K. Robbins; Cash, Michele; DeVincenzi, Donald L. (Technical Monitor)

    2000-01-01

    The Earth can support life because: (1) its orbit lies in the Sun's habitable zone', and (2) it contains enough volatile material (e.g. water and organics) for life to flourish. However, it seems likely that the Earth was drier when it formed because it accreted in a part of the Sun's protoplanetary nebula that was too hot for volatiles to condense. If this is correct, water and organics must have been delivered to the habitable zone, after dissipation of the solar nebula, from a 'wet zone' in the asteroid belt or the outer solar system, where the nebula was cool enough for volatiles to condense. Material from the wet zone would have been delivered to the Earth by Jupiter and Saturn. Gravitational perturbations from these giant planets made much of the wet zone unstable, scattering volatile-rich planetesimals and protoplanets across the Solar System. Some of these objects ultimately collided with the inner Planets which themselves lie in a stable part of the Solar System. Giant planets are now being discovered orbiting other sunlike stars. To date, these planets have orbits and masses very different from Jupiter and Saturn, such that few if any of these systems is likely to have terrestrial planets in the star's habitable zone. However, new discoveries are anticipated due to improved detector sensitivity and the increase in the timespan of observations. Here we present numerical experiments examining the range of giant-planet characteristics that: (1) allow stable terrestrial Planets to exist in a star's habitable zone, and (2) make a large part of the star's wet zone weakly unstable, thus delivering volatiles to the terrestrial planets over an extended period of time after the dissipation of the solar nebula.

  17. Traditional Food in Western Balkan Countries Consumers’ Perceptions and Habits

    OpenAIRE

    Barjolle, Dominique; Brecic, Ruzica; Cerjak, Marija; Giraud, Georges

    2015-01-01

    Te aim of this paper is to explore consumers' perceptions and habits regarding traditional food in the Western Balkan Countries. In each Western Balkan country, two focus groups were carried-out (total twelve focus groups; eight to ten participants per each – total sample of 104 participants). Results of this study show that consumer motives for the choice of traditional products pertain to higher health, safety, sensory and increasingly also sustainability beliefs and expectation. Results of...

  18. The Relation of Eating Habits with Obesity in University Students

    Directory of Open Access Journals (Sweden)

    Mehmet Altın

    2015-10-01

    Full Text Available In this study, it was aimed to determine the relation of eating habits with obesity in university students. Hereby, totally 604 students including 226 females and 378 males, studying at 5 different faculties of Selcuk University in the 2013-2014 academic year, participated in this study. The students’ heights, weights and body mass indexes (BMI were estimated, their BMI values were calculated by dividing body weights (cm into square meter (m² of height. A questionnaire was applied to the relevant students in order to assess their eating habits through the BAI (Eating Habits Index developed by Demirezen and Coşansu in 2005. The BAI internal consistency analysis the Cronbach alpha value was estimated as 0,76. To determine the differences from the total points in BAI between the female and male students, t-test was used in the independent groups; the answers to the questions by the students were expressed as percentages and frequencies. Within this study; the female students’ BMI value was found out as 26,23 ± 7,74, the male students’ BMI value was also found out as 23,43 ± 8,12, in all of the groups this value was estimated as 24,77 ± 7,02 as well. According to the reports of the World Health Organization, these values are regarded as a category of overweight ones (Table 1. While the total BAI value of females was 13,2, the BAI value of males was 12,4, when considering the all relevant students in the research, this value was calculated as 12,7. According to these results, considering the university students’ eating habits, it is concluded that males have risks at a medium level while females have higher risks of obesity.

  19. Spectroscopic constraints on growth of Siberian mixed-habit diamonds

    Science.gov (United States)

    Skuzovatov, Sergei Yu.; Zedgenizov, Dmitry A.; Rakevich, Alexander L.

    2017-06-01

    Notable within-crystal variability of mineralogical and geochemical properties of single natural diamonds are commonly attributed to changing chemistry of parental fluids, sources of carbon and redox conditions of diamond precipitation. A distinct type of compositional heterogeneity (mixed-habit structure) is well-known to occur in diamonds as well as in many other minerals due to purely "structural" reasons that are unequal crystal chemistry of crystallographically different faces and selective absorption and fractionation of impurities between adjacent growth pyramids. Based on the combined cathodoluminescence, Fourier-transformed infrared spectroscopy and photoluminescence spectroscopy, study of nine diamond crystals with different growth histories and external morphology, but all showing mixed-habit patterns at different growth stages, we show that mixed-diamonds may grow in closed system conditions or with a slowly decreasing growth rate from a media with a much lower impurity content than previously thought. Intracrystal nitrogen distribution seems to be a function of growth rate even in the cases of unusual impurity partitioning between growth sectors. Generally poor with IR-active hydrogen at moderate nitrogen aggregation parameters, studied diamonds likely resemble the low hydrogen content from the growth medium that, for cubic diamonds, was typically suggested hydrogen-rich and a crucial factor for growth of cubic and mixed-habit diamonds. We also show that mixed-habit diamond growth may occur not only in peridotitic suite but also in an extended field of geochemical affinities from high-Ni to low-Ni or maybe even Ni-free environments, such as pyroxenitic or eclogitic.

  20. Studying the Formation, Evolution, and Habitability of the Galilean Satellites

    Science.gov (United States)

    McGrath, M. A.; Waite, J. H.; Brockwell, T.; McKinnon, W. B.; Wyrick, D. Y.; Mousis, O.; Magee, B.

    2013-12-01

    Highly sensitive, high-mass resolution mass spectrometry is an important in situ tool for the study of solar system bodies. In this talk we detail the science objectives, develop the rationale for the measurement requirements, and describe potential instrument/mission methodologies for studying the formation, evolution, and habitability of the Galilean satellites. We emphasize our studies of Ganymede and Europa as described in our instrument proposals for the recently selected JUICE mission and the proposed Europa Clipper mission.