WorldWideScience

Sample records for maa takeoff 7-8-04

  1. 14 CFR 25.113 - Takeoff distance and takeoff run.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff distance and takeoff run. 25.113... and takeoff run. (a) Takeoff distance on a dry runway is the greater of— (1) The horizontal distance... include a clearway, the takeoff run is equal to the takeoff distance. If the takeoff distance includes...

  2. 14 CFR 23.59 - Takeoff distance and takeoff run.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff distance and takeoff run. 23.59... Takeoff distance and takeoff run. For each commuter category airplane, the takeoff distance and, at the option of the applicant, the takeoff run, must be determined. (a) Takeoff distance is the greater of—...

  3. Unistuste maa / Fred Jüssi

    Index Scriptorium Estoniae

    Jüssi, Fred, 1935-

    2010-01-01

    Rahvusvahelise dokumentaalfilmi festivali DocPoint avafilmina Kumu Auditooriumis 29. ja 31. jaanuaril linastuvast Islandi režissööride Thorfinnur Gudnasoni ja Andri Snær Magnasoni filmist "Unistuste maa"

  4. Maa tõmbab, maa tõukab : Uusimaid raamatuid lugedes / Peeter Künstler

    Index Scriptorium Estoniae

    Künstler, Peeter, 1958-2009

    1995-01-01

    Arvustused: Vahing, Vaino. Kaunimad jutud. Tartu : Ilmamaa, 1995 ; Dovlatov, Sergei. Kompromiss. Tallinn : Kupar, 1995 ; Mukka, Timo K. Maa on patune laul. [Tartu] : Ilmamaa, 1995 ; Luiga, Juhan. Mäss ja meelehaigus. Tartu : Ilmamaa, 1995 ; Böll, Heinrich. Katharina Blumi kaotatud au. Tallinn : Perioodika, 1995 ; Nirk, Endel. Siin maa peal. 2. Tallinn : E. Nirk, 1995

  5. Maa hoiab rahva koos / Janno Reiljan

    Index Scriptorium Estoniae

    Reiljan, Janno, 1951-

    2002-01-01

    Ilmunud ka: Koit, Lääne-Harju Ekspress 3. august lk. 6;3, Hiiu Leht 6. august lk. 5, Nädaline 6. august lk. 4, Molodjozh Estonii 7. august lk. 9, Meie Maa 7. august lk. 2, Valgamaalane 15. august lk. 2, ERL Teataja juuli-august nr. 7-8 lk. 2. Autori sõnul ei poolda Rahvaliit välismaalastele maamüügi täielikku ja igavest keelustamist. Välismaalastele maa müügi piirangu põhimõtted. Autor: ERL. Parlamendisaadik

  6. UNESCO peakorteris avati rahvusvaheline Planeet Maa Aasta / Alvar Soesoo

    Index Scriptorium Estoniae

    Soesoo, Alvar, 1963-

    2008-01-01

    12.-13. veebruaril oli UNESCO peakorteris Pariisis rahvusvahelise Maa Aasta avaüritus. Maa Aasta ürituste sari Eestis algas geoteadusele ja ühiskonna vajadustele pühendatud üritustega 2007. aastal

  7. UNESCO peakorteris avati rahvusvaheline Planeet Maa Aasta / Alvar Soesoo

    Index Scriptorium Estoniae

    Soesoo, Alvar, 1963-

    2008-01-01

    12.-13. veebruaril oli UNESCO peakorteris Pariisis rahvusvahelise Maa Aasta avaüritus. Maa Aasta ürituste sari Eestis algas geoteadusele ja ühiskonna vajadustele pühendatud üritustega 2007. aastal

  8. Nabalas ongi maa-alused jõed / Viio Aitsam

    Index Scriptorium Estoniae

    Aitsam, Viio, 1955-

    2008-01-01

    Kose valla elanikud tellisid maa-aluseid jõgesid tõestama Soome kuulsa georadarifirma, kes avastas Nabala lubjakivimaardla alalt lisaks teadaolevale kaheksale veel ka üheksanda maa-aluse vooluveekogu. Lisa: Kas ministeerium tunnistab soomlaste uuringut?

  9. 14 CFR 23.57 - Takeoff path.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff path. 23.57 Section 23.57... path. For each commuter category airplane, the takeoff path is as follows: (a) The takeoff path extends... completed; and (1) The takeoff path must be based on the procedures prescribed in § 23.45; (2) The...

  10. Isa-ema maa : [luuletused] / Leelo Tungal

    Index Scriptorium Estoniae

    Tungal, Leelo, 1947-

    2001-01-01

    Sisu: Isa-ema maa ; Vahetund ; Päkapikk võis näha ; Kodune jutt ; Koeruse mõõt ; mütsid ; Loomade laul ; Igal sügisel ; Väike jõulusoov ; Millal tuled, jõuluvana ; Paharet ; Suur õun ; Teiste laste mänguasjad ; Oi heldeke! ; Tere-tere ; Kui ma ... ; Magus tähestik ; Pluss ja miinus ; Pinalis ; Esimese klassi õpilane ; Teise klassi õpilane ; Miks on kana vana? ; Hommik ; Seitsme maa ja mere taga ; Köha pere ; Harjad ; Täna sügist mängib suvi ; Toas ; Laps jäi voodis magama ; Klassivennad ; Talvehommik ; Siili elu ; Hiirehernesupp ; Hundi lugemine ; Karu ärkamine ; Unelaul ; Salajutt ; Kooli eel ; Laiskvorsti elu ; Kindel plaan ; Oma kohal ; Puhkama ; Vana vahva lasteaed ; Sama laps ; Tüli

  11. 14 CFR 23.53 - Takeoff performance.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff performance. 23.53 Section 23.53... STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES Flight Performance § 23.53 Takeoff performance. (a) For normal, utility, and acrobatic category airplanes, the takeoff distance must...

  12. Eclipse takeoff and flight

    Science.gov (United States)

    1998-01-01

    This 25-second clip shows the QF-106 'Delta Dart' tethered to the USAF C-141A during takeoff and in flight. NASA Dryden Flight Research Center, Edwards, California, supported a Kelly Space and Technology, Inc. (KST)/U.S. Air Force project known as Eclipse, which demonstrated a reusable tow launch vehicle concept. The purpose of the project was to demonstrate a reusable tow launch vehicle concept that had been conceived and patented by KST. Kelly Space obtained a contract with the USAF Research Laboratory for the tow launch demonstration project under the Small Business Innovation Research (SBIR) program. The USAF SBIR contract included the modifications to turn the QF-106 into the Experimental Demonstrator #1 (EXD-01), and the C141A aircraft to incorporate the tow provisions to link the two aircraft, as well as conducting flight tests. The demonstration consisted of ground and flight tests. These tests included a Combined Systems Test of both airplanes joined by a tow rope, a towed taxi test, and six towed flights. The primary goal of the project was demonstrating the tow phase of the Eclipse concept using a scaled-down tow aircraft (C-141A) and a representative aerodynamically-shaped aircraft (QF-106A) as a launch vehicle. This was successfully accomplished. On December 20, 1997, NASA research pilot Mark Stucky flew a QF-106 on the first towed flight behind an Air Force C-141 in the joint Eclipse project with KST to demonstrate the reusable tow launch vehicle concept developed by KST. Kelly hoped to use the data from the tow tests to validate a tow-to-launch procedure for reusable space launch vehicles. Stucky flew six successful tow tests between December 1997 and February 6, 1998. On February 6, 1998, the sixth and final towed flight brought the project to a successful completion. Preliminary flight results determined that the handling qualities of the QF-106 on tow were very stable; actual flight measured values of tow rope tension were well within predictions

  13. Effecten van uiterwaardverlaging op landbouw en natuur langs de Maas

    NARCIS (Netherlands)

    Eupen, van M.; Maas, G.J.; Stoffelsen, G.H.; Wolfert, H.P.

    2003-01-01

    De overkoepelde studie Integrale Verkenning Maas (IVM) is een verkennend onderzoek naar de mogelijkheden om een verhoogde afvoer van de Maas van 4.600 m3/s door het beheersgebied van de Directie Limburg te voeren. Randvoorwaarden daarbij is, dat de waterstanden behorende bij de huidige veiligheidsno

  14. Modern acoustics in China related to Dah-You MAA

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jialu

    2006-01-01

    The history of Acoustics is very long, but for modern Acoustics it was only started from the end of 19th century after Bell's and Sabine's works. Modern Acoustics in China was developed even later. The main contributions to the development of modern Acoustics in China of Dah-You MAA and his academic achievements were presented in this paper. It is shown that Dah-You MAA who is one of the founders of the normal mode theory and the modern Acoustics in China has played an important role in developing modern Acoustics. Some preliminary studies of MAA's scientific philosophy and his social activities were discussed in this paper also.

  15. Kranich kiidab maa-ameti eksjuhti / Toivo Tänavsuu

    Index Scriptorium Estoniae

    Tänavsuu, Toivo

    2006-01-01

    Endine keskkonnaminister, firma South Kinnisvara omanik Heiki Kranich ei usu, et maa-ameti vahistatud peadirektor Kalev Kangur on seadust rikkunud. Firma varasematest maavahetustehingutest, H. Kranichi kavatsusest firma likvideerida. Lisa: Vettuse tehing oli kolmes versioonis

  16. A purified MAA-based ELISA is a useful tool for determining anti-MAA antibody titer with high sensitivity

    Science.gov (United States)

    Shimomoto, Takasumi; Collins, Leonard B.; Yi, Xianwen; Holley, Darcy W.; Zhang, Zhenfa; Tian, Xu; Uchida, Koji; Wang, Chunguang; Hörkkö, Sohvi; Willis, Monte S.; Gold, Avram; Bultman, Scott J.; Nakamura, Jun

    2017-01-01

    Atherosclerosis is widely accepted to be a chronic inflammatory disease, and the immunological response to the accumulation of LDL is believed to play a critical role in the development of this disease. 1,4-Dihydropyridine-type MAA-adducted LDL has been implicated in atherosclerosis. Here, we have demonstrated that pure MAA-modified residues can be chemically conjugated to large proteins without by-product contamination. Using this pure antigen, we established a purified MAA-ELISA, with which a marked increase in anti-MAA antibody titer was determined at a very early stage of atherosclerosis in 3-month ApoE-/- mice fed with a normal diet. Our methods of Nε-MAA-L-lysine purification and purified antigen-based ELISA will be easily applicable for biomarker-based detection of early stage atherosclerosis in patients, as well as for the development of an adduct-specific Liquid Chromatography/Mass Spectrometry-based quantification of physiological and pathological levels of MAA. PMID:28222187

  17. 14 CFR 25.111 - Takeoff path.

    Science.gov (United States)

    2010-01-01

    ... height equal to its wing span. (e) For airplanes equipped with standby power rocket engines, the takeoff... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff path. 25.111 Section 25.111 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT...

  18. 14 CFR 23.61 - Takeoff flight path.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff flight path. 23.61 Section 23.61... flight path. For each commuter category airplane, the takeoff flight path must be determined as follows: (a) The takeoff flight path begins 35 feet above the takeoff surface at the end of the...

  19. 14 CFR 25.115 - Takeoff flight path.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff flight path. 25.115 Section 25.115... STANDARDS: TRANSPORT CATEGORY AIRPLANES Flight Performance § 25.115 Takeoff flight path. (a) The takeoff flight path shall be considered to begin 35 feet above the takeoff surface at the end of the...

  20. Analysis of proteins involved in the production of MAA׳s in two Cyanobacteria Synechocystis PCC 6803 and Anabaena cylindrica.

    Science.gov (United States)

    Rahman, Md Akhlaqur; Sinha, Sukrat; Sachan, Shephali; Kumar, Gaurav; Singh, Shailendra Kumar; Sundaram, Shanthy

    2014-01-01

    Mycosporine- like amino acids (MAAs) are small (6803 and Anabaena cylindrica were tested for their ability to synthesize MAAs and protein involved in the production of MAAs. It was found that protein sequence 3-phosphoshikimate 1-carboxyvinyltransferase is involved in producing mycosporine glycine in Synechocystis PCC 6803 and 3-dehydroquinate synthase is involved for producing shinorine in Anabaena cylindrica. Phylogenetic and bioinformatic analysis of Mycosporine like amino acid producing protein sequence of both cyanobacterial species Synechocystis PCC 6803 and Anabaena cylindrica provide a useful framework to understand the relationship of the different forms and how they have evolved from a common ancestor. These products seem to be conserved but the residues are prone to variation which might be due the fact that different cyanobacteria show different physiological process in response of Ultraviolet stress.

  1. Take-off and landing of aicraft

    Directory of Open Access Journals (Sweden)

    Nicolae APOSTOLESCU

    2012-06-01

    Full Text Available In this paper, the take-off and landing segments of an airplane trajectory are studied. The equations of motion for the ground run are derived and solved for distance. Then, specific formulas are obtained for the take-off ground distance and time and the landing ground distance and time. Transitions from take-off to climb and descent to landing are investigated so that take-off distance and landing distance and time can be estimated. The run distances and the run times for take-of and landing dependent of altitude, speed wing, temperature, the coefficient of rolling friction. In conformity with mathematical model, programs of calculation were elaborated. Also interfaces of calculations were elaborated for programs of calculation.

  2. Kas Soome on paha maa? / Aku Louhimies ; interv. Margit Tõnson

    Index Scriptorium Estoniae

    Louhimies, Aku

    2006-01-01

    Vestlus soome režissööriga tema festivalidel mitmeid auhindu saanud filmist "Paha maa" : Soome 2005. Režissöör filmib Niguliste kirikus stseene oma neljandasse filmi "Paljas mees". Lisaks fakte "Aku Louhimies - laia ampluaaga filmimees"

  3. Venus Express uurib Maa kurja kaksikut / ref. Triin Thalheim

    Index Scriptorium Estoniae

    2005-01-01

    9. novembril startis Baikonuri kosmodroomilt Veenusele Euroopa Kosmoseagentuuri sond Venus Express, mis peaks planeedi atmosfääri sisenema aprillis. Teadlaste sõnul peab sondi saadetav info aitama mõista naaberplaneedi kliimat ja atmosfääri ning tooma selgust, kas Maa võib kunagi Veenuse sarnaseks muutuda. Lisaks joonis: Venus Express

  4. Venus Express uurib Maa kurja kaksikut / ref. Triin Thalheim

    Index Scriptorium Estoniae

    2005-01-01

    9. novembril startis Baikonuri kosmodroomilt Veenusele Euroopa Kosmoseagentuuri sond Venus Express, mis peaks planeedi atmosfääri sisenema aprillis. Teadlaste sõnul peab sondi saadetav info aitama mõista naaberplaneedi kliimat ja atmosfääri ning tooma selgust, kas Maa võib kunagi Veenuse sarnaseks muutuda. Lisaks joonis: Venus Express

  5. Maaülikool Tõnissoni õunaaias / Heli Raamets

    Index Scriptorium Estoniae

    Raamets, Heli, 1975-

    2011-01-01

    Vendade Jaan, Jüri ja Hans Tõnissonide aiandusalastest ettevõtmistest ja kinnisvaradest Tartu külje all Eerikal möödunud sajandi algul. Tõnissoni Wennaste Aia-äri oli eestlaste vanim kavakindlalt sisse seatud aiandusettevõte. Jüri Tõnissoni villast tahab maaülikool arendada mahepõllumajandusliku uurimiskeskuse

  6. Effect of Polymerization Condition on Particle Size Distribution in St/BA/MAA Emulsion Polymerization Process

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    A series of St/BA/MAA emulsion polymerizations was carried out. By using PCS (photon correlation spectroscopy), the particle size distribution(PSD) of the whole St/BA/MAA emulsion polymerization process was gotten easily and quickly. The effect of polymerization condition on PSD in St/BA/MAA emulsion process was discussed.

  7. Maa asendamise ja ostueesõigusega erastamise kord Tallinna linnas : [bakalaureusetöö] / Kersti Kägi ; Tartu Ülikool, õigusteaduskond ; juhendaja: Kalle Merusk

    Index Scriptorium Estoniae

    Kägi, Kersti

    1995-01-01

    Maade asendamine ja ostueesõigusega erastamine maareformi osana, õigusvastaselt võõrandatud maa asendamine, maa ostueesõigusega erastamine; maa asendamise kord Tallinna linnas, maa ostueesõigusega erastamise kord Tallinna linnas

  8. Maas-Rijnverbinding: een verkennende studie naar mogelijke scheepvaartverbindingen tussen de Maas en de Rijn alsmede naar effecten daarvan

    NARCIS (Netherlands)

    Agema, J.F.; Ferguson, A.; Stuip, J.; Tiemersma, J.J.

    1985-01-01

    In het voorliggende rapport is allereerst een inventarisatie gemaakt van studies, geïnitiëerd en uitgevoerd door diverse instanties, organisaties en/of belanghebbenden naar een verbinding tussen de Maas en de Rijn. De kern van het rapport is een tracé-onderzoek. Met behulp van een multicriteria-anal

  9. Determination of rare earth elements in plant protoplasts by MAA

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    A preliminary study on the speciation of rare earth elements in plant cells has been carried out by molecular activation analysis (MAA). Mesophyll protoplasts of Brassica napus were isolated by enzymatic digestion. After being washed with isosmotic solution containing EDTA for several times, the protoplasts were purified by gradient centrifugation. Then the concentration of rare earth elements (REEs) in the protoplasts was determined by neutron activation analysis. The result shows that REEs can enter the cells of the plant.

  10. Motion fidelity during a simulated takeoff

    NARCIS (Netherlands)

    Groen, E.L.; Hosman, R.J.A.W.; Dominicus, J.W.

    2003-01-01

    In this psychophysical study, seven airline pilots reported on their perceived self-motion in response to variations of motion filter gains during a simulated takeoff. Each pilot participated both as pilot flying and pilot non-flying. In order to vary the gains of the simulated linear acceleration

  11. Synthesis and characterization of PEG-P(MAA-SS-VCL) nanoparticles

    Science.gov (United States)

    Yu, L. L.; Yang, K.; Mu, R. H.; Zhang, N.; Su, L.

    2016-07-01

    The PEG-P(MAA-SS-VCL) nanoparticles were obtained using disulfide containing dimethacrylate (SS) as cross-linking agent, using polyethylene glycol methyl acrylate (PEGMA), N-Vinyl-ε-caprolactam (VCL), and methacrylic acid (MAA) as monomers via homogeneous polymerization in aqueous. The PEG-P(MAA-SS-VCL) nanoparticles were characterized by FT-IR and TGA. The particle size and morphology variation in different environments were detected by dynamic light scattering (DLS) and scanning electron microscopy (SEM). It is the very method that PEG-P(MAA-SS-VCL) nanoparticles can be obtained in this study.

  12. The Mindful Attention Awareness Scale for Adolescents (MAAS-A): psychometric properties in a Dutch sample

    NARCIS (Netherlands)

    de Bruin, E.I.; Zijlstra, B.J.H.; van de Weijer-Bergsma, E.; Bögels, S.M.

    2011-01-01

    The factor structure and psychometric properties of the Dutch version of the Mindful Attention Awareness Scale for Adolescents (MAAS-A) was studied in a sample of adolescents (n = 717; age range, 11-17 years) of the general population. The MAAS-A and other questionnaires measuring other constructs w

  13. The Mindful Attention Awareness Scale for Adolescents (MAAS-A): psychometric properties in a Dutch sample

    NARCIS (Netherlands)

    de Bruin, E.I.; Zijlstra, B.J.H.; van de Weijer-Bergsma, E.; Bögels, S.M.

    2011-01-01

    The factor structure and psychometric properties of the Dutch version of the Mindful Attention Awareness Scale for Adolescents (MAAS-A) was studied in a sample of adolescents (n = 717; age range, 11-17 years) of the general population. The MAAS-A and other questionnaires measuring other constructs

  14. Synthesis, characterization and properties of radiation-induced Starch/(EG-co-MAA hydrogels

    Directory of Open Access Journals (Sweden)

    H.L. Abd El-Mohdy

    2016-11-01

    Full Text Available Association of poly(carboxylic acids and non-ionic polymers in solutions via hydrogen bonding results in formation of novel polymeric materials–interpolymer complexes. Starch/(EG-co-MAA polymeric hydrogels were obtained by γ-initiated radiation copolymerization of ethylene glycol (EG with methacrylic acid (MAA which grafted on starch. The gel content of prepared hydrogels was varied with changes in starch content, EG:MAA composition and irradiation dose as well as crosslinking density. The swelling was studied as a function of starch content, EG:MAA composition, irradiation dose, type of soaked liquid, pH and temperature of matrix-surrounding medium. The degree of swelling greatly increased with enhanced MAA content, pH and temperature whereas, it decreased with reduced starch content and irradiation dose. The swelling was varied with the polarity of soaked liquid. The results showed that Starch/(EG-co-MAA hydrogels reached the equilibrium swelling state in water after 72 h. The structure and surface morphology of prepared polymer were confirmed with FTIR and SEM, respectively. The thermal properties of hydrogels were studied by using DSC and TGA, they cleared that there is miscibility between EG and MAA in copolymer and adding them improve the thermal stability of starch. The results indicate that Starch/(EG-co-MAA materials may be used in various applications.

  15. PNIPAAm-MAA nanoparticles as delivery vehicles for curcumin against MCF-7 breast cancer cells.

    Science.gov (United States)

    Zeighamian, Vahideh; Darabi, Masoud; Akbarzadeh, Abolfazl; Rahmati-Yamchi, Mohammad; Zarghami, Nosratollah; Badrzadeh, Fariba; Salehi, Roya; Mirakabad, Fatemeh Sadat Tabatabaei; Taheri-Anganeh, Mortaza

    2016-01-01

    Breast cancer is the most frequently occurring cancer among women throughout the world. Natural compounds such as curcumin hold promise to treat a variety of cancers including breast cancer. However, curcumin's therapeutic application is limited, due to its rapid degradation and poor aqueous solubility. On the other hand, previous studies have stated that drug delivery using nanoparticles might improve the therapeutic response to anticancer drugs. Poly(N-isopropylacrylamide-co-methacrylic acid) (PNIPAAm-MAA) is one of the hydrogel copolymers utilized in the drug delivery system for cancer therapy. The aim of this study was to examine the cytotoxic potential of curcumin encapsulated within the NIPAAm-MAA nanoparticle, on the MCF-7 breast cancer cell line. In this work, polymeric nanoparticles were synthesized through the free radical mechanism, and curcumin was encapsulated into NIPAAm-MAA nanoparticles. Then, the cytotoxic effect of curcumin-loaded NIPAAm-MAA on the MCF-7 breast cancer cell line was measured by MTT assays. The evaluation of the results showed that curcumin-loaded NIPAAm-MAA has more cytotoxic effect on the MCF-7 cell line and efficiently inhibited the growth of the breast cancer cell population, compared with free curcumin. In conclusion, this study indicates that curcumin-loaded NIPAAm-MAA suppresses the growth of the MCF-7 cell line. Overall, it is concluded that encapsulating curcumin into the NIPAAm-MAA copolymer could open up new avenues for breast cancer treatment.

  16. The effective take-off angle in PHI Quantera systems

    NARCIS (Netherlands)

    Van der Marel, C.

    2010-01-01

    It is well known that for quantitative analysis of XPS results theeffective take-off angle of the electrons is an important parameter.In the report is shown that the effective take-off angle i n PHI Quantera systems deviates significanlty from the set value. This is NOT a consequence of inadequa

  17. A case of hepatopulmonary syndrome diagnosed by {sup 99m}Tc-MAA perfusion lung scan

    Energy Technology Data Exchange (ETDEWEB)

    Oh, Hyung Tae; Lee, Moo Yong; Song, Il Han; Park, Seok Gun [College of Medicine, Dankook Univ., Cheonan (Korea, Republic of)

    2002-06-01

    In patients with chronic liver disease, hepatopulmonary syndrome, the right to left shunt without previous pulmonary and cardiac disease, can develope and cause respiratory distress. Tools to prove shunt are contrast echocardiography, pulmonary angiography, and {sup 99m}Tc-MAA perfusion lung scan. Among them, {sup 99m}Tc-MAA scan is a simple and safe method detecting the right to left shunt. At the same time, quantitation of shunt amount is possible by this method. We report a case of hepatopulmonary syndrome confirmed by {sup 99m}Tc-MAA scan and contrast echocardiography with review of literatures.

  18. Aerodynamic ground effect in fruitfly sized insect takeoff

    CERN Document Server

    Kolomenskiy, Dmitry; Engels, Thomas; Liu, Hao; Schneider, Kai; Nave, Jean-Christophe

    2015-01-01

    Flapping-wing takeoff is studied using numerical modelling, considering the voluntary takeoff of a fruitfly as reference. The parameters of the model are then varied to explore the possible effects of interaction between the flapping-wing model and the ground plane. The numerical method is based on a three-dimensional Navier-Stokes solver and a simple flight dynamics solver that accounts for the body weight, inertia, and the leg thrust. Forces, power and displacements are compared for takeoffs with and without ground effect. Natural voluntary takeoff of a fruitfly, modified takeoffs and hovering are analyzed. The results show that the ground effect during the natural voluntary takeoff is negligible. In the modified takeoffs, the ground effect does not produce any significant increase of the vertical force neither. Moreover, the vertical force even drops in most of the cases considered. There is a consistent increase of the horizontal force, and a decrease of the aerodynamic power, if the rate of climb is suff...

  19. Validity evidence of the brazilian version of the Mindful Attention Awareness Scale (MAAS

    Directory of Open Access Journals (Sweden)

    Víviam Vargas de Barros

    2015-03-01

    Full Text Available Mindfulness is a skill that allows the practitioner to expand an existing space between stimulus and response, so he/she may make more conscious choices which in turn prevents the perpetuation of dysfunctional patterns of behaviors, contributing to the improvement of his/her well-being. The goal of this study was to evaluate the psychometric properties of the Brazilian version of the Mindful Attention Awareness Scale (MAAS in a sample with 395 participants divided into smokers, people from the general population, college students and meditators. They answered the MAAS and the Psychological Well-Being Scale (PWBS. An exploratory factor analysis was conducted to test the factor structure of the MAAS. Internal consistency, test-retest reliability and split half were respectively assessed with Cronbach's α and correlation coefficients. Construct validity was examined by correlating the MAAS with psychological well-being. Criterion validity was assessed by comparing the meditators' scores on the MAAS with the scores of other participants. After the exploratory factor analysis, the Brazilian MAAS remained a unidimensional scale. Reliability [α = .83; split half = .67 and test-retest = .80 (p < .001] and validity measures were adequate, except the criterion validity which was not confirmed in the mentioned sample.

  20. Unmanned air vehicle: autonomous takeoff and landing

    Science.gov (United States)

    Lim, K. L.; Gitano-Briggs, Horizon Walker

    2010-03-01

    UAVs are increasing in popularity and sophistication due to the demonstrated performance which cannot be attained by manned aircraft1. These developments have been made possible by development of sensors, instrumentation, telemetry and controls during the last few decades. UAVs are now common in areas such as aerial observation and as communication relays3. Most UAVs, however, are still flown by a human pilot via remote control from a ground station. Even the existing autonomous UAVs often require a human pilot to handle the most difficult tasks of take off and landing2 (TOL). This is mainly because the navigation of the airplane requires observation, constant situational assessment and hours of experience from the pilot himself4. Therefore, an autonomous takeoff and landing system (TLS) for UAVs using a few practical design rules with various sensors, instrumentation, etc has been developed. This paper details the design and modeling of the UAV TLS. The model indicates that the UAV's TLS shows promising stability.

  1. The role of traditional foods in food-based dietary guidelines - A South African case study on maas (cultured milk).

    Science.gov (United States)

    Du Plooy, Z; Schönfeldt, H C; Hall, N

    2018-01-01

    With the revision of the South African food-based dietary guidelines (FBDGs) a new guideline specifically recommending the daily consumption of dairy products including maas (cultured milk) was introduced. This paper aims to evaluate the relevance of including maas as a traditional food product in the FBDGs. It was found that maas is a culturally relevant and traditional food product in South Africa. The nutrient profile of maas has changed notably over time since the first nutrient analysis was performed in 1995. The health benefits of maas, together with its popularity and its cultural relevance as part of the South African diet, make maas a suitable traditional food product to be included in the South African FBDGs. Copyright © 2017 Elsevier Ltd. All rights reserved.

  2. Effect of Low Molecule Polyamide and Nano-SiO2 on Properties of the Poly (MMA/BA/MAA)

    Institute of Scientific and Technical Information of China (English)

    Wenjun ZOU; Bo LIAO; Jin PENG; Linqi ZHANG; Yun YANG; Furen XIAO

    2007-01-01

    Effects of Iow molecule polyamide (LMPA) and namometer SiO2 particles on the properties of the poly (MMA/BA/MAA) adhesive for wearable and nonskid PVC (polyvinyl carbazole) materials were investigated. The experimental results show that the shear strength of poly (MMA/BA/MAA)/LMPA is increased, when the LMPA is added into poly (MMA/BA/MAA). The optimum addition of LMPA is about 4 wt pct. By adding 3 wt pct nano-SiO2 into poly (MMA/BA/MAA)/LMPA adhesive, its properties such as the shear strength,thermal stability, wear resistance and sea waterproof resistance are increased too.

  3. {sup 99m}Tc-MAA/{sup 90}Y-Bremsstrahlung SPECT/CT after simultaneous Tc-MAA/{sup 90}Y-microsphere injection for immediate treatment monitoring and further therapy planning for radioembolization

    Energy Technology Data Exchange (ETDEWEB)

    Ahmadzadehfar, Hojjat; Sabet, Amir; Muckle, Marianne; Reichmann, Karl; Biersack, Hans-Juergen; Ezziddin, Samer [University Hospital Bonn, Department of Nuclear Medicine, Bonn (Germany); Wilhelm, Kai [University Hospital Bonn, Department of Radiology, Bonn (Germany)

    2011-07-15

    An angiographic evaluation combined with {sup 99m}Tc-macroaggregated albumin (Tc-MAA) scanning should precede the treatment of any selected candidates for radioembolization (RE) of the liver. If the tumours in one liver lobe have not been targeted in the test angiogram, it should be repeated. However, in a few cases treatment of one liver lobe or at least some segments is safe and feasible and performing a repeated test angiogram with Tc-MAA (Re-MAA) in a separate session leads to more radiation exposure and could be time consuming. Our aim was to evaluate the feasibility of concurrent RE of a part of the liver and therapy planning for another region by simultaneous injection of the Tc-MAA and {sup 90}Y-microspheres in two different locations in the therapy session. Tc-MAA and bremsstrahlung (BS) single photon emission computed tomography (SPECT)/CT were performed separately in an effort to distinguish between the distributions of these two different radiopharmaceuticals. RE was combined with a simultaneous second test angiogram of another lobe or segments in the same session in six patients [44-70 years; five women (83%)]. Five patients suffered from colorectal carcinoma (CRC) and one from ovarian cancer. Tc-MAA and BS SPECT/CT were performed for all cases. Post-therapeutic Tc-MAA SPECT/CT showed in all patients only the distribution of Tc-MAA without any detectable BS. Evaluation of {sup 90}Y-microsphere distribution was not always possible in the post-therapeutic BS scan performed 24 h later due to remaining Tc-MAA radiation. However, scans performed at 48 h post-intervention no longer showed any Tc-MAA ''contamination''. Combining RE and Re-MAA is feasible in appropriately selected patients. (orig.)

  4. [Examination of the psychometric properties of the French translation of the Maternal Antenatal Attachment Scale (MAAS)].

    Science.gov (United States)

    Denis, A; Callahan, S; Bouvard, M

    2015-02-01

    Prenatal attachment (PA) is defined as the relationship that develops between a woman and her foetus. Three measurements exist for evaluating PA: the Maternal Foetal Attachment Scale (MFAS), the Maternal Antenatal Attachment Scale (MAAS) and the Prenatal Attachment Inventory (PAI). Of these three, only the PAI has been used in French. The overall objective of the current study was to evaluate the psychometric properties of this second measure of PA: the MAAS. This scale was developed in 1993 by Condon. The MAAS is a 19-item self-report questionnaire which allows for calculating a total attachment score and two subscale scores; one score estimating the quality of the affective attachment experience and the other that estimates the intensity of concern about the foetus. For each item, the future mother provided an appreciation on a 5-point Likert scale (1=absence of feelings for the foetus; 5=very strong feelings for the foetus). The sample was composed of 117 primiparous French females (27.5 ± 4.27 years) in the third trimester of pregnancy (32.84 ± 3.77 weeks of amenorrhea). The study was carried out over a period of 5 months (January-May 2012). Each woman was asked to provide demographic data, a French version of the MAAS, a validated French version of the PAI, and a scale evaluating depressive symptoms (Edinburgh PostNatal Depression Scale, EPDS). The MAAS demonstrated moderately good psychometric properties. Condon's two-factor structure of MAAS was not supported in our sample. Four factors were identified with exploratory factor analysis. Internal consistency was satisfactory for the global scale and for the factor 1 but not sufficiently adequate for the other factors. Concurrent validity was indicated by moderate correlations between the global MAAS scores with the total PAI score. A weak but significant inverse correlation was found between the MAAS and the EPDS suggesting good divergent validity. The authors suggest that additional research be conducted on

  5. Avastatud maa-alune järv võib lõpetada Darfuri kodusõja / Karin Volmer

    Index Scriptorium Estoniae

    Volmer, Karin

    2007-01-01

    Ilmunud ka: Postimees : na russkom jazõke, 23. juuli 2007, lk. 6. Teadlaste hinnangul võib Darfuri konflikti lõpetada Darfuris avastatud maa-alune järv, sest kodusõda araablastest karjakasvatajate ja põlluharijatest põliselanike vahel võib tingitud olla veepuudusest. Kaart: Darfuri maa-alune järv. Lisa: Darfuri konflikt

  6. Density Functional Theory (DFT) Study of Molecularly Imprinted Polymer (MIP) Methacrylic Acid (MAA) with D-Glucose

    Science.gov (United States)

    Wungu, T. D. K.; Marsha, S. E.; Widayani; Suprijadi

    2017-07-01

    In order to find an alternative biosensor material which enables to detect the glucose level, therefore in this study, the interaction between Methacrylic Acid (MAA) based Molecularly Imprinted Polymer (MIP) with D-Glucose is investigated using the Density Functional Theory (DFT). The aim of this study is to determine whether a molecule of the MAA can be functioned as a bio-sensing of glucose. In this calculation, the Gaussian 09 with B3LYP and 631+G(d) basis sets is used to calculate all electronic properties. It is found that the interaction between a molecule of MAA and a molecule of D-Glucose was observed through the shortened distance between the two molecules. The binding energy of MAA/D-glucose and the Mulliken population analysis are investigated for checking possible interaction. From analysis, the MAA based MIP can be used as a bio-sensing material.

  7. 76 FR 77111 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-12-12

    ... Federal Aviation Administration 14 CFR Part 97 Standard Instrument Approach Procedures, and Takeoff... Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure... obtained from: 1. FAA Public Inquiry Center (APA-200), FAA Headquarters Building, 800 Independence...

  8. 78 FR 7650 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-02-04

    ... Federal Aviation Administration 14 CFR Part 97 Standard Instrument Approach Procedures, and Takeoff... Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure... from: 1. FAA Public Inquiry Center (APA-200), FAA Headquarters Building, 800 Independence Avenue...

  9. 75 FR 76626 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-12-09

    ... 8260-15A. The large number of SIAPs, Takeoff Minimums and ODPs, in addition to their complex nature and... Koyukuk, AK, Koyukuk, DIBVY TWO, Graphic Obstacle DP Platinum, AK, Platinum, Takeoff Minimums and...

  10. 75 FR 60304 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-09-30

    .... John M. Allen, Director, Flight Standards Service. Adoption of the Amendment Accordingly, pursuant to..., Takeoff Minimums and Obstacle DP, Amdt 2 Minden, LA, Minden-Webster, Takeoff Minimums and Obstacle...

  11. Aerodynamic Ground Effect in Fruitfly Sized Insect Takeoff.

    Directory of Open Access Journals (Sweden)

    Dmitry Kolomenskiy

    Full Text Available Aerodynamic ground effect in flapping-wing insect flight is of importance to comparative morphologies and of interest to the micro-air-vehicle (MAV community. Recent studies, however, show apparently contradictory results of either some significant extra lift or power savings, or zero ground effect. Here we present a numerical study of fruitfly sized insect takeoff with a specific focus on the significance of leg thrust and wing kinematics. Flapping-wing takeoff is studied using numerical modelling and high performance computing. The aerodynamic forces are calculated using a three-dimensional Navier-Stokes solver based on a pseudo-spectral method with volume penalization. It is coupled with a flight dynamics solver that accounts for the body weight, inertia and the leg thrust, while only having two degrees of freedom: the vertical and the longitudinal horizontal displacement. The natural voluntary takeoff of a fruitfly is considered as reference. The parameters of the model are then varied to explore possible effects of interaction between the flapping-wing model and the ground plane. These modified takeoffs include cases with decreased leg thrust parameter, and/or with periodic wing kinematics, constant body pitch angle. The results show that the ground effect during natural voluntary takeoff is negligible. In the modified takeoffs, when the rate of climb is slow, the difference in the aerodynamic forces due to the interaction with the ground is up to 6%. Surprisingly, depending on the kinematics, the difference is either positive or negative, in contrast to the intuition based on the helicopter theory, which suggests positive excess lift. This effect is attributed to unsteady wing-wake interactions. A similar effect is found during hovering.

  12. MAA-modified and luminescence properties of ZnO quantum dots

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The precursor of ZnO has been prepared by refluxing in ethanol at 70℃ for 4 h using ZnAc2·H2O as the initial agent. Then ZnO has been prepared from the reaction of LiOH·H2O and the precursor. The ZnO is modified by mercaptoacetic acid (MAA) and detected by SEM and XRD. These ZnO particles have single phase,like-sphere and size of 4.6 nm. The modified effectivity of MAA for the quantum dots (QDs) has been investigated with UV-visible and fluorescence analysis,and the mechanism and property of ZnO light emitting have been discussed under given conditions. The reasons why the fluorescent emission peak of surface defects disappear and the exciton emission peak increase are that MAA effectively covers the surface defects of ZnO and stably coats ZnO particles. At the same time,the effect of the added amount of the MAA,temperature and electrolyte on light-emitting properties of modified product has also been studied. The result shows that the modified ZnO QDs have good fluorescence property,stability and suitable capability of resisting electrolyte. These results are important for biological analysis.

  13. Two-dimensional structure of the MAAS-Global rating list for consultation skills of doctors

    NARCIS (Netherlands)

    J.M. van Es; C.J.W. Schrijver; H.H. Oberink; M.R.M. Visser

    2012-01-01

    Background: The MAAS-Global (MG) is widely used to assess doctor-patient communication skills. Reliability and validity have been investigated, but little is known about its dimensionality. Assuming physicians tend to adopt certain styles or preferences in their communication with patients, a multi-

  14. Eesti Maaülikooli uus üliõpilasesindus astus ametisse / Silver Kuusik

    Index Scriptorium Estoniae

    Kuusik, Silver

    2008-01-01

    Maaülikooli üliõpilasesinduse üldistest ja konkreetsetest eesmärkidest. Küsimusele, mida vast valitud esinduse liikmed kooli heaks teha saavad, vastasid Kersti Pärtelpoeg, Veikko Kiis, Anni Haavakats, Julia Koltsova, Maarja Sõrmus, Rainer Zirnask, Gerlin Järvela, Iiris Rausk, Marili Köster, Christina Birnbaum ja Siim Lokko

  15. Eesti Maaülikooli spordihoone = Estonian University of Life Sciences' Athletics Centre

    Index Scriptorium Estoniae

    2010-01-01

    Eesti Sisearhitektide Liidu 2009. a. ühiskondliku interjööri preemia pälvinud Eesti Maaülikooli spordihoonest Tartus Kreutzwaldi t. 3. Sisekujunduse autorid Katrin Kaevats ja Jaan Port (Funk AB), nende tähtsamate tööde loetelu. Hoone arhitekt Salto AB (Karli Luik, Ralf Lõoke, Maarja Kask)

  16. Two-dimensional structure of the MAAS-Global rating list for consultation skills of doctors

    NARCIS (Netherlands)

    van Es, J.M.; Schrijver, C.J.W.; Oberink, H.H.; Visser, M.R.M.

    2012-01-01

    Background: The MAAS-Global (MG) is widely used to assess doctor-patient communication skills. Reliability and validity have been investigated, but little is known about its dimensionality. Assuming physicians tend to adopt certain styles or preferences in their communication with patients, a

  17. Eesti Maaülikooli spordihoone = Estonian University of Life Sciences' Athletics Centre

    Index Scriptorium Estoniae

    2010-01-01

    Eesti Sisearhitektide Liidu 2009. a. ühiskondliku interjööri preemia pälvinud Eesti Maaülikooli spordihoonest Tartus Kreutzwaldi t. 3. Sisekujunduse autorid Katrin Kaevats ja Jaan Port (Funk AB), nende tähtsamate tööde loetelu. Hoone arhitekt Salto AB (Karli Luik, Ralf Lõoke, Maarja Kask)

  18. Effecten van polaire organische microverontreinigingen (XAD-concentraat) op de ontwikkeling van fytoplankton in de Maas

    NARCIS (Netherlands)

    Breebaart L; Tubbing GMJ; Burger-Wiersma T; LWD

    1996-01-01

    Binnen het projekt Ecologisch Herstel Rijn en Maas vindt onderzoek plaats naar de effecten van stoffen op het voorkomen en functioneren van planktongemeenschappen in het Maasstroomgebied. Tijdens het Maasmonitoring programma in 1993 is in de maanden april, juni en augustus additioneel onderzoek

  19. 14 CFR 25.491 - Taxi, takeoff and landing roll.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Taxi, takeoff and landing roll. 25.491 Section 25.491 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY AIRPLANES Structure Ground Loads § 25.491 Taxi...

  20. QUALITY INFLUENCE OF SURFACE ON AIRCRAFT TAKE-OFF

    Directory of Open Access Journals (Sweden)

    2016-01-01

    Full Text Available The article considers quality impact influence of surface on aircraft take-off. It considers the IL-114 takeoff with all the operating engines. The goal of this research is to conduct calculating experiment to determine quality influence of surface on alteration of IL-114 takeoff characteristics during operation. Researches were carried out using the system of mathematical modeling of a flight dynamics. The main part of the system is a unit for calculating increments of aerodynam- ic coefficients caused with changing of technical condition of the surface of the airframe (roughness, waviness, available protruding elements on the airframe surface, etc. and residual deformation of the wing, fuselage, vertical and horizontal tail, as well as the difference between the rods symmetrically operating engines. In order to compute loss of rod and an increase in engine fuel consumption due to engine operation time during operation, an integral factor of thrust loss and increase in fuel consumption coefficient were introduced. Research proved that the individual characteristics of the aircraft, due to loss of engine power and increase in drag do not affect the assigned level of flight safety. The plane has a considera- ble reserve as for unsafe takeoff speed and the full gradient of climb, that ensures safety of operation.

  1. Kahtlustus : maa-ameti juht võttis 11 miljonit krooni pistist! / Sulev Vedler, Tarmo Vahter

    Index Scriptorium Estoniae

    Vedler, Sulev, 1970-

    2006-01-01

    Ilmunud ka: Infopress 20. okt. nr. 42 lk. 152. Kaitsepolitsei versiooni kohaselt olid supersoodsad maadevahetused Maa-ameti juhi Kalev Kanguri isiklik salaäri, kes omakasu huvides kasutas ära võimu ja teadmisi, peamised kõrge riigiametniku vastu esitatud süüdistused. Vt. samas lk. A3: Janar Filippov. Riigikogulased nõudsid eeluurimisinfo avaldamist; lk. A4: Kelle tellimusi täitis Kanguri punt?; Raul Ranne. Mida otsis Kapo Merkost; Jüri Muttika. Kuidas Annus hankis 58 hektarit maad Rae vallas; lk. A28: Tex Vertmann. Meedia võim ettevõtte väärtuse kujundajana. Maa-ameti korruptsioonijuhtumi seostamine Merkoga mõjutas viimase aktsia hinda

  2. Kahtlustus : maa-ameti juht võttis 11 miljonit krooni pistist! / Sulev Vedler, Tarmo Vahter

    Index Scriptorium Estoniae

    Vedler, Sulev, 1970-

    2006-01-01

    Ilmunud ka: Infopress 20. okt. nr. 42 lk. 152. Kaitsepolitsei versiooni kohaselt olid supersoodsad maadevahetused Maa-ameti juhi Kalev Kanguri isiklik salaäri, kes omakasu huvides kasutas ära võimu ja teadmisi, peamised kõrge riigiametniku vastu esitatud süüdistused. Vt. samas lk. A3: Janar Filippov. Riigikogulased nõudsid eeluurimisinfo avaldamist; lk. A4: Kelle tellimusi täitis Kanguri punt?; Raul Ranne. Mida otsis Kapo Merkost; Jüri Muttika. Kuidas Annus hankis 58 hektarit maad Rae vallas; lk. A28: Tex Vertmann. Meedia võim ettevõtte väärtuse kujundajana. Maa-ameti korruptsioonijuhtumi seostamine Merkoga mõjutas viimase aktsia hinda

  3. Psychometric properties of the Spanish version of the mindful attention awareness scale (MAAS in patients with fibromyalgia

    Directory of Open Access Journals (Sweden)

    Cebolla Ausias

    2013-01-01

    Full Text Available Abstract Background Mindful-based interventions improve functioning and quality of life in fibromyalgia (FM patients. The aim of the study is to perform a psychometric analysis of the Spanish version of the Mindful Attention Awareness Scale (MAAS in a sample of patients diagnosed with FM. Methods The following measures were administered to 251 Spanish patients with FM: the Spanish version of MAAS, the Chronic Pain Acceptance Questionnaire, the Pain Catastrophising Scale, the Injustice Experience Questionnaire, the Psychological Inflexibility in Pain Scale, the Fibromyalgia Impact Questionnaire and the Euroqol. Factorial structure was analysed using Confirmatory Factor Analyses (CFA. Cronbach's α coefficient was calculated to examine internal consistency, and the intraclass correlation coefficient (ICC was calculated to assess the test-retest reliability of the measures. Pearson’s correlation tests were run to evaluate univariate relationships between scores on the MAAS and criterion variables. Results The MAAS scores in our sample were low (M = 56.7; SD = 17.5. CFA confirmed a two-factor structure, with the following fit indices [sbX2 = 172.34 (p  Conclusion Psychometric properties of the Spanish version of the MAAS in patients with FM are adequate. The dimensionality of the MAAS found in this sample and directions for future research are discussed.

  4. Acumulación de aminoácidos tipo micosporina (MAAs: biosíntesis, fotocontrol y funciones ecofisiológicas Accumulation of mycosporine-like amino acids (MAAs: biosynthesis, photocontrol and ecophysiological functions

    Directory of Open Access Journals (Sweden)

    NATHALIE KORBEE

    2006-03-01

    Full Text Available Los efectos nocivos que inducen la radiación UV en organismos acuáticos pueden ser aminorados a través de varios mecanismos de fotoprotección entre los que se encuentran la acumulación de sustancias que absorben radiación UV (fotoprotectores y activación de sistemas antioxidantes. Entre los fotoprotectores descritos se encuentran los aminoácidos tipo micosporina (MAAs. En esta revisión se enfatiza sobre la capacidad fotoprotectora y antioxidante de estas sustancias. La función fotoprotectora de los MAAs puede deducirse de las características fotofísicas de estos compuestos. Es sabido que actúan como pantalla pasiva disipando térmicamente la energía UV absorbida. La acumulación de MAAs se induce tanto por radiación UV (UV-A y UV-B como por luz azul dentro de la banda de la radiación activa fotosintética (PAR. Por otro lado, hay algunas referencias que indican otras funciones fisiológicas de los MAAs, incluyendo la actividad antioxidante, la regulación osmótica y la reproductora. Siendo los MAAs sustancias nitrogenadas, recientemente se ha comenzado a estudiar la influencia de la disponibilidad de nitrógeno en la acumulación de estos, en combinación con UV y/o alta irradiancia de PAR. El amonio se moviliza hacia los MAAs relativamente rápido, por lo que se ha propuesto también a los MAAs como reservorio de nitrógenoThe negative effects of UV radiation on aquatic organisms can be diminished by several photo-protective mechanisms such as the accumulation of UV absorbing substances (photoprotectors and the activation of antioxidant systems. The mycosporine-like amino acids (MAAs are one of the most known photoprotectors. In this review their photoprotective and antioxidant capabilities are described. The UV screening function of MAAs can be inferred from their photophysic characteristics. It is known that MAAs act as passive screen dissipating the UV energy absorbed as thermal form. The accumulation of MAAs is induced by

  5. Maaülikooli uksed uutele tulijatele valla / Sirje Pärismaa

    Index Scriptorium Estoniae

    Pärismaa, Sirje, 1958-

    2008-01-01

    Oma õpingutest räägivad maaülikooli tudengid: Kadi Avi (majandusarvestus ja finantsjuhtimine III), Kaiti Pilk (maastikuarhitekt III), Mart Kelk (metsatööstuse magistrantuur I), Karin Ojamäe (rakendushüdrobioloogia III), Heidi Heitur (ökonoomika ja ettevõtlus I); Margus Paesalu (metsatööstus III), Kadri Kalle ( maastikukaitse ja -hoolduse magistrantuur I), Liisi Õunapuu (loodusvarade kasutamine ja kaitse III), Laura Niemelä (veterinaarmeditsiin IV) ja Peep Teppo (metsamajanduse magistrantuur II) ning õppeprorektor Jüri Lehtsaar

  6. Maaülikooli uksed uutele tulijatele valla / Sirje Pärismaa

    Index Scriptorium Estoniae

    Pärismaa, Sirje, 1958-

    2008-01-01

    Oma õpingutest räägivad maaülikooli tudengid: Kadi Avi (majandusarvestus ja finantsjuhtimine III), Kaiti Pilk (maastikuarhitekt III), Mart Kelk (metsatööstuse magistrantuur I), Karin Ojamäe (rakendushüdrobioloogia III), Heidi Heitur (ökonoomika ja ettevõtlus I); Margus Paesalu (metsatööstus III), Kadri Kalle ( maastikukaitse ja -hoolduse magistrantuur I), Liisi Õunapuu (loodusvarade kasutamine ja kaitse III), Laura Niemelä (veterinaarmeditsiin IV) ja Peep Teppo (metsamajanduse magistrantuur II) ning õppeprorektor Jüri Lehtsaar

  7. Parimad 2009: maaülikool, Apollo, Baltika, Röa paviljon / Tanel Veenre

    Index Scriptorium Estoniae

    Veenre, Tanel, 1977-

    2010-01-01

    Eesti Sisearhitektide Liidu aastapreemiad. Ajaloolise interjööri preemia: Röa pargipaviljon - autor Leila Pärtelpoeg. Ühiskondliku interjööri preemia: Eesti Maaülikooli spordihoone - autorid Katrin Kaevats ja Jaan Port. Büroo preemia: Baltika büroohoone - autorid AB Studio 3, Kolm Pluss Üks. Kaupluse preemia: Apollo raamatupood Solarise keskuses - autorid Tüüne-Kristin ja Urmo Vaikla. Näitus "Eesti parimad interjöörid" Arhitektuuri- ja Disainigaleriis 30. maini 2010

  8. Effect of solvents on properties of Bombyx mori silk grafted by methyl methacrylate (MMA and methacrylamide (MAA

    Directory of Open Access Journals (Sweden)

    Wattana Klairatsamee

    2005-11-01

    Full Text Available Mulberry silks were chemically modified in order to increase weight gain, resulting from degumming process using graft copolymerisation technique with vinyl monomers, i.e. MMA, MAA and MMA/MAA. Due to the appearance of PMMA homopolymer granules adhered on the MMA- and MMA/MAA-grafted silk surfaces resulting in surface roughness when silk was grafted by MMA in water, the influence of grafting solvents was examined, using different water/ethanol volume ratios of 100/0, 75/25, 50/50, 25/75 and 0/100. FTIR spectra of the grafted silks presented the absorption bands of the vinyl monomers used for the grafting process. In addition, high values of % polymer add-on were obtained for all of the grafted silks. It was also found that the suitable solvents were 25/75 water/ethanol for the silk grafted by MMA and MMA/MAA, and water for the silk grafted by MAA, in order to get the smooth grafted silk surface and high polymer add-on. Moreover, all the grafted silks showed slightly greater stiffness, as indicated by the increase of Young's modulus and the decrease of elongation.

  9. Comment on "Identification of low order manifolds: validating the algorithm of Maas and Pope" [Chaos 9, 108-123 (1999)].

    Science.gov (United States)

    Flockerzi, Dietrich; Heineken, Wolfram

    2006-12-01

    It is claimed by Rhodes, Morari, and Wiggins [Chaos 9, 108-123 (1999)] that the projection algorithm of Maas and Pope [Combust. Flame 88, 239-264 (1992)] identifies the slow invariant manifold of a system of ordinary differential equations with time-scale separation. A transformation to Fenichel normal form serves as a tool to prove this statement. Furthermore, Rhodes, Morari, and Wiggins [Chaos 9, 108-123 (1999)] conjectured that away from a slow manifold, the criterion of Maas and Pope will never be fulfilled. We present two examples that refute the assertions of Rhodes, Morari, and Wiggins. In the first example, the algorithm of Maas and Pope leads to a manifold that is not invariant but close to a slow invariant manifold. The claim of Rhodes, Morari, and Wiggins that the Maas and Pope projection algorithm is invariant under a coordinate transformation to Fenichel normal form is shown to be not correct in this case. In the second example, the projection algorithm of Maas and Pope leads to a manifold that lies in a region where no slow manifold exists at all. This rejects the conjecture of Rhodes, Morari, and Wiggins mentioned above.

  10. Electromagnetic launch systems for civil aircraft assisted take-off

    Directory of Open Access Journals (Sweden)

    Bertola Luca

    2015-12-01

    Full Text Available This paper considers the feasibility of different technologies for an electromagnetic launcher to assist civil aircraft take-off. This method is investigated to reduce the power required from the engines during initial acceleration. Assisted launch has the potential of reducing the required runway length, reducing noise near airports and improving overall aircraft efficiency through reducing engine thrust requirements. The research compares two possible linear motor topologies which may be efficaciously used for this application. The comparison is made on results from both analytical and finite element analysis (FEA.

  11. AGFATL- ACTIVE GEAR FLEXIBLE AIRCRAFT TAKEOFF AND LANDING ANALYSIS

    Science.gov (United States)

    Mcgehee, J. R.

    1994-01-01

    The Active Gear, Flexible Aircraft Takeoff and Landing Analysis program, AGFATL, was developed to provide a complete simulation of the aircraft takeoff and landing dynamics problem. AGFATL can represent an airplane either as a rigid body with six degrees of freedom or as a flexible body with multiple degrees of freedom. The airframe flexibility is represented by the superposition of up to twenty free vibration modes on the rigid-body motions. The analysis includes maneuver logic and autopilots programmed to control the aircraft during glide slope, flare, landing, and takeoff. The program is modular so that performance of the aircraft in flight and during landing and ground maneuvers can be studied separately or in combination. A program restart capability is included in AGFATL. Effects simulated in the AGFATL program include: (1) flexible aircraft control and performance during glide slope, flare, landing roll, and takeoff roll under conditions of changing winds, engine failures, brake failures, control system failures, strut failures, restrictions due to runway length, and control variable limits and time lags; (2) landing gear loads and dynamics for up to five gears; (3) single and multiple engines (maximum of four) including selective engine reversing and failure; (4) drag chute and spoiler effects; (5) wheel braking (including skid-control) and selective brake failure; (6) aerodynamic ground effects; (7) aircraft carrier operations; (8) inclined runways and runway perturbations; (9) flexible or rigid airframes; 10) rudder and nose gear steering; and 11) actively controlled landing gear shock struts. Input to the AGFATL program includes data which describe runway roughness; vehicle geometry, flexibility and aerodynamic characteristics; landing gear(s); propulsion; and initial conditions such as attitude, attitude change rates, and velocities. AGFATL performs a time integration of the equations of motion and outputs comprehensive information on the airframe

  12. Optimal take-off trajectories in the presence of windshear

    Science.gov (United States)

    Miele, A.; Wang, T.; Melvin, W. W.

    1986-01-01

    The present consideration of takeoff trajectory optimization in eight different fundamental problems involving wind shears assumes that the power setting is held at the maximum value, and that the aircraft is controlled with respect to angle-of-attack. While the first three problems are least-squares ones of the Bolza type, the remaining five are minimax problems of the Chebyshev type which can be converted to Bolza type by means of suitable transformations. All problems are solved on the basis of the dual sequential gradient-restoration algorithm for optimal control problems. The trajectory solutions obtained are superior to constant angle-of-attack trajectories.

  13. Mindfulness and psychopathology: Adaptation of the Mindful Attention Awareness Scale (MAAS in a Spanish sample

    Directory of Open Access Journals (Sweden)

    Santiago Barajas

    2014-01-01

    Full Text Available Se presenta una adaptación al español de la Mindful Attention Awareness Scale (MAAS (Brown y Ryan, 2003. El trabajo se realizó con una muestra clínica de pacientes (N= 100 con trastornos de ansiedad, depresivos y trastorno límite de la personalidad, una muestra de población general (N= 100, y una muestrade estudiantes universitarios (N= 54. La validez de criterio se contrastó mediante correlaciones con CBAS, BDI-II, BAI y AAQ-II. Los resultados demuestran una elevada consistencia interna (α= .88, equivalente a la encontrada hasta ahora en otros trabajos con muestras fundamentalmente de estudiantes de otros países. Se encontraron diferencias estadísticamente significativas en la puntuación entre las tres muestras. Los sujetos normales muestran un mayor nivel de mindfulness, al menos tal y como este es medido por la MAAS, que los estudiantes y estos últimos mayor que los pacientes con sintomatología clínica de ansiedad y/o depresión.

  14. 14 CFR 121.637 - Takeoffs from unlisted and alternate airports: Domestic and flag operations.

    Science.gov (United States)

    2010-01-01

    ... airports: Domestic and flag operations. 121.637 Section 121.637 Aeronautics and Space FEDERAL AVIATION... Flight Release Rules § 121.637 Takeoffs from unlisted and alternate airports: Domestic and flag operations. (a) No pilot may takeoff an airplane from an airport that is not listed in the...

  15. 75 FR 32653 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-06-09

    ... Giddings, TX, Giddings-Lee County, Takeoff Minimum and Obstacle DP, Orig Hebbronville, TX, Jim Hogg County, GPS RWY 13, Amdt 1A, CANCELLED Hebbronville, TX, Jim Hogg County, NDB RWY 13, Amdt 4 Hebbronville, TX, Jim Hogg County, RNAV (GPS) RWY 13, Orig Hebbronville, TX, Jim Hogg County, Takeoff Minimum...

  16. 14 CFR Appendix I to Part 25 - Installation of an Automatic Takeoff Thrust Control System (ATTCS)

    Science.gov (United States)

    2010-01-01

    ... Appendix I to Part 25—Installation of an Automatic Takeoff Thrust Control System (ATTCS) I25.1General. (a... crew to increase thrust or power. I25.2Definitions. (a) Automatic Takeoff Thrust Control System (ATTCS... Control System (ATTCS) I Appendix I to Part 25 Aeronautics and Space FEDERAL AVIATION...

  17. 14 CFR 25.904 - Automatic takeoff thrust control system (ATTCS).

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Automatic takeoff thrust control system... Automatic takeoff thrust control system (ATTCS). Each applicant seeking approval for installation of an engine power control system that automatically resets the power or thrust on the operating engine(s)...

  18. 14 CFR 29.55 - Takeoff decision point (TDP): Category A.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff decision point (TDP): Category A... decision point (TDP): Category A. (a) The TDP is the first point from which a continued takeoff capability... assured within the distance determined under § 29.62. (b) The TDP must be established in relation to the...

  19. 14 CFR 23.66 - Takeoff climb: One-engine inoperative.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Takeoff climb: One-engine inoperative. 23... Performance § 23.66 Takeoff climb: One-engine inoperative. For normal, utility, and acrobatic category... airplanes in the normal, utility, and acrobatic category, the steady gradient of climb or descent must...

  20. 75 FR 63712 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-10-18

    ... Continent, VOR RWY 14, Amdt 1D Boston, MA, General Edward Lawrence Logan Intl, Takeoff Minimums and Obstacle... Mount Pocono, PA, Pocono Mountains Muni, RNAV (GPS) RWY 13, Amdt 2 Mount Pocono, PA, Pocono Mountains Muni, RNAV (GPS) RWY 31, Amdt 1 Mount Pocono, PA, Pocono Mountains Muni, Takeoff Minimums and Obstacle...

  1. Changes in long jump take-off technique with increasing run-up speed.

    Science.gov (United States)

    Bridgett, Lisa A; Linthorne, Nicholas P

    2006-08-01

    The aim of this study was to determine the influence of run-up speed on take-off technique in the long jump. Seventy-one jumps by an elite male long jumper were recorded in the sagittal plane by a high-speed video camera. A wide range of run-up speeds was obtained using direct intervention to set the length of the athlete's run-up. As the athlete's run-up speed increased, the jump distance and take-off speed increased, the leg angle at touchdown remained almost unchanged, and the take-off angle and take-off duration steadily decreased. The predictions of two previously published mathematical models of the long jump take-off are in reasonable agreement with the experimental data.

  2. The Impacts of Rising Temperatures on Aircraft Takeoff Performance

    Science.gov (United States)

    Coffel, Ethan; Thompson, Terence R.; Horton, Radley M.

    2017-01-01

    Steadily rising mean and extreme temperatures as a result of climate change will likely impact the air transportation system over the coming decades. As air temperatures rise at constant pressure, air density declines, resulting in less lift generation by an aircraft wing at a given airspeed and potentially imposing a weight restriction on departing aircraft. This study presents a general model to project future weight restrictions across a fleet of aircraft with different takeoff weights operating at a variety of airports. We construct performance models for five common commercial aircraft and 19 major airports around the world and use projections of daily temperatures from the CMIP5 model suite under the RCP 4.5 and RCP 8.5 emissions scenarios to calculate required hourly weight restriction. We find that on average, 10 - 30% of annual flights departing at the time of daily maximum temperature may require some weight restriction below their maximum takeoff weights, with mean restrictions ranging from 0.5 to 4% of total aircraft payload and fuel capacity by mid- to late century. Both mid-sized and large aircraft are affected, and airports with short runways and high temperatures, or those at high elevations, will see the largest impacts. Our results suggest that weight restriction may impose a non-trivial cost on airlines and impact aviation operations around the world and that adaptation may be required in aircraft design, airline schedules, and/or runway lengths.

  3. Biomechanical and dynamic mechanism of locust take-off

    Science.gov (United States)

    Chen, Dian-Sheng; Yin, Jun-Mao; Chen, Ke-Wei; Li, Zhen

    2014-10-01

    The biomimetic locust robot hopping vehicle has promising applications in planet exploration and reconnaissance. This paper explores the bionic dynamics model of locust jumping by using high-speed video and force analysis. This paper applies hybrid rigid-flexible mechanisms to bionic locust hopping and studies its dynamics with emphasis laid on the relationship between force and jumping performance. The hybrid rigid-flexible model is introduced in the analysis of locust mechanism to address the principles of dynamics that govern locust joints and mechanisms during energy storage and take-off. The dynamic response of the biomimetic mechanism is studied by considering the flexibility according to the locust jumping dynamics mechanism. A multi-rigid-body dynamics model of locust jumping is established and analyzed based on Lagrange method; elastic knee and tarsus mechanisms that were proposed in previous works are analyzed alongside the original bionic joint configurations and their machinery principles. This work offers primary theories for take-off dynamics and establishes a theoretical basis for future studies and engineering applications.

  4. The effect of an advisory system on pilots' go/no-go decision during take-off

    DEFF Research Database (Denmark)

    Bove, T.; Andersen, H.B.

    2002-01-01

    The take-off phase of modem airliners is a relatively critical phase of flight. Thus, about 12% of all civil aviation accidents happen during take-off. In this paper we describe results of an experimental study of a prototype cockpit advisory take-off monitoring system designed to help pilots...

  5. Laccase immobilized onto poly(GMA-MAA) microspheres for p-benzenediol removal from wastewater.

    Science.gov (United States)

    Li, Congcong; Lou, Yuhong; Wan, Yazhen; Wang, Weiqiang; Yao, Jilei; Zhang, Bing

    2013-01-01

    Enzymes have already been extensively applied to degrade various organic pollutants in industrial wastewater, and how to improve the stability and reusability of the enzymes is critical to their practical application. In this study, poly(glycidyl methacrylate-methacrylic acid), poly(GMA-MAA), microspheres were prepared by suspension polymerization, and were used as a new support to immobilize Trametes versicolor laccase. The maximum loading capacity to immobilize enzyme reached as high as 44.78 mg protein/g support. The stability and reusability of laccase were greatly improved after immobilization on the microspheres. While the immobilized laccase was used as catalyst to remove p-benzenediol from wastewater, the removal efficiency reached 88.5%.

  6. The effect of lumber sympathectomy. Evaluation of using {sup 99m}Tc-MAA

    Energy Technology Data Exchange (ETDEWEB)

    Tachihara, Hiromasa; Akaba, Noritake; Shimada, Takao [Jikei Univ., Tokyo (Japan). School of Medicine

    1996-05-01

    Lumbar sympathectomy (LST) remains even now an effective treatment especially for severe ischemic symptoms, such as ulcerous necrosis of skin, in chronic obstructive disease of artery. The efficacy of LST is evaluated not only by a comparative study of the clinical effect of treatment, but also by a through evaluation of functional change in the sympathetic nerves occurring after LST. In the present investigation, we used a nuclear medical test with {sup 99m}Tc-MAA, and calculated the rate of arteriovenous shunt in the lower extremities from the dilation of subcutaneous arteriovenous anastomosis (AVAs) caused by LST. We then evaluated the effect of LST based on this rate. The present study consisted of 26 patients with Buerger`s disease treated in our department in the period from 1977 to 1995. The patients were examined by the nuclear medical test before and after LST. From the results of the shunt rate in 23 patients (a total of 69 limbs), except for three patients whose test was not successful, we investigated the prolonged effect of LST. It was concluded that: measurement of the rate of arteriovenous shunt in the lower extremities with {sup 99m}Tc-MAA was useful for the quantitative evaluation of LST efficacy, L{sub 2-4} LST, the standard procedure performed, led to stable and prolonged sympathetic blockage of long-duration, and although the effect of LST has not yet been clarified in many respects, the findings suggested that a difference exists in the action of sympathetic blockage (collapse) by LST between diabetic neuropathy and Buerger`s disease. (author)

  7. Synthesis and Study of Guest-Rebinding of MIP Based on MAA Prepared using Theophylline Template

    Science.gov (United States)

    Nurhayati, T.; Yanti; Royani, I.; Widayani; Khairurrijal

    2016-08-01

    A molecularly imprinted polymer (MIP) based on methacrylic acid (MAA) monomer and theophylline template has been synthesized using a modified bulk polymerization method. Theophylline was employed as a template and it formed a complex with MAA through hydrogen bonding. Self-assembly of template-monomer was followed by cross-linking process using ethylene glycol dimethacrylate (EGDMA) cross-linker. The polymerization process was initiated by thermal decomposition of benzoyl peroxide (BPO) as the initiator at 60oC after cooling treatment at -5oC. After 7 hours, a rigid polymer was obtained and followed by grinding the polymer and removing the template. As a reference, a nonimprinted polymer (NIP) has also been synthesized using similar procedure by excluding the template. FTIR study was carried out to investigate the presence of theophylline in the as- prepared polymer, MIP, and NIP. The spectra indicated that theophylline was successfully incorporated in the as-prepared polymer. This result was also confirmed by EDS analysis showing that N atoms of the as-prepared polymer were derived from amino group of theophylline. Furthermore, the polymer particles of MIP were irregular in shape and size as shown by its SEM image. The capability of guest-rebinding of the MIP was analyzed through Batchwise guest-binding experiment. The results showed that for initial concentration of theophylline in methanol/chloroform (1/1, v/v) of 0.333 mM, the binding capacity of the MIP was 23.22 /mol/g. Compared to the MIP, the adsorption capacity of the NIP was only 3.73 /mol/g. This result shows that MIP has higher affinity than NIP.

  8. Maa-ameti eksjuht läks Tiit Vähi palgale / Aleksei Günter, Andrus Karnau

    Index Scriptorium Estoniae

    Günter, Aleksei, 1979-

    2007-01-01

    Ilmunud ka: Postimees : na russkom jazõke, 16. aug. 2007, lk. 4. Looduskaitsemaade vahetuse skandaali tõttu kapo uurimise alla sattunud maa-ameti eksjuht Kalev Kangur asus tööle Silmet Grupis sadama õigusnõunikuna. Lisa: Maadevahetuse skandaal

  9. Integreeritud ökosüsteemiuuringud Järvseljal : õhk-vesi-maa / Steffen M. Noe, Ülo Niinemets

    Index Scriptorium Estoniae

    Noe, Steffen M., 1966-

    2008-01-01

    Järvselja Õppe- ja Katsemetskonnas toimunud Euroopa Teadusfondi VOCBAS ja Keskkonnainvesteeringute Keskuse projekti raames biosfääri ja atmosfääri vastasmõjude uurimise rahvusvahelisest mõõtekampaaniast, millel osalesid ka Maaülikooli teadlased

  10. Wing and body kinematics of takeoff and landing flight in the pigeon (Columba livia).

    Science.gov (United States)

    Berg, Angela M; Biewener, Andrew A

    2010-05-01

    Takeoff and landing are critical phases in a flight. To better understand the functional importance of the kinematic adjustments birds use to execute these flight modes, we studied the wing and body movements of pigeons (Columba livia) during short-distance free-flights between two perches. The greatest accelerations were observed during the second wingbeat of takeoff. The wings were responsible for the majority of acceleration during takeoff and landing, with the legs contributing only one-quarter of the acceleration. Parameters relating to aerodynamic power output such as downstroke amplitude, wingbeat frequency and downstroke velocity were all greatest during takeoff flight and decreased with each successive takeoff wingbeat. This pattern indicates that downstroke velocity must be greater for accelerating flight to increase the amount of air accelerated by the wings. Pigeons used multiple mechanisms to adjust thrust and drag to accelerate during takeoff and decelerate during landing. Body angle, tail angle and wing plane angles all shifted from more horizontal orientations during takeoff to near-vertical orientations during landing, thereby reducing drag during takeoff and increasing drag during landing. The stroke plane was tilted steeply downward throughout takeoff (increasing from -60+/-5 deg. to -47+/-1 deg.), supporting our hypothesis that a downward-tilted stroke plane pushes more air rearward to accelerate the bird forward. Similarly, the stroke plane tilted upward during landing (increasing from -1+/-2 deg. to 17+/-7 deg.), implying that an upward-tilted stroke plane pushes more air forward to slow the bird down. Rotations of the stroke plane, wing planes and tail were all strongly correlated with rotation of the body angle, suggesting that pigeons are able to redirect aerodynamic force and shift between flight modes through modulation of body angle alone.

  11. Behaviour of coconut mites preceding take-off to passive aerial dispersal.

    Science.gov (United States)

    Melo, J W S; Lima, D B; Sabelis, M W; Pallini, A; Gondim, M G C

    2014-12-01

    For more than three decades the coconut mite Aceria guerreronis Keifer is one of the most important pests of coconut palms and has recently spread to many coconut production areas worldwide. Colonization of coconut palms is thought to arise from mites dispersing aerially after take-off from other plants within the same plantation or other plantations. The underlying dispersal behaviour of the mite at take-off, in the airborne state and after landing is largely unknown and this is essential to understand how they spread from tree to tree. In this article we studied whether take-off to aerial dispersal of coconut mites is preceded by characteristic behaviour, whether there is a correlation between the body position preceding aerial dispersal and the direction of the wind, and whether the substrate (outer surface of coconut bracts or epidermis) and the wind speed matter to the decision to take-off. We found that take-off can sometimes be preceded by a raised body stance, but more frequently take-off occurs while the mite is walking or resting on its substrate. Coconut mites that become airborne assumed a body stance that had no relation to the wind direction. Take-off was suppressed on a substrate providing food to coconut mites, but occurred significantly more frequently on the outer surface of coconut bracts than on the surface of the fruit. For both substrates, take-off frequency increased with wind speed. We conclude that coconut mites have at least some degree of control over take-off for aerial dispersal and that there is as yet no reason to infer that a raised body stance is necessary to become airborne.

  12. Differences in kinematics of the support limb depends on specific movement tasks of take-off

    Directory of Open Access Journals (Sweden)

    Vladimír Hojka

    2016-06-01

    Full Text Available Background: Many sport activities are a sequence of jumps (running, jumping, hurdling etc.. Each jump flight phase is the result of the execution of the previous support phase. Objective: The goal of the research was to identify differences in adjustment of the support lower limb and differences in take-off kinematics in specific take-off movement task. Methods: 14 male athletes (22.6 ± 4.4 years; 182.4 ± 5.3 cm; 74.7 ± 6.2 kg took part in a laboratory experiment. Each athlete performed five different take-off movements (running, acceleration running - second step, long jump take-off, high jump take-off and take-off to the hurdle. System Qualisys was used to analyze the kinematics of the support limb. Dynamics of the support phase was monitored via force plate. ANOVA and Bonferroni post-hoc test were used to measure the significance of the differences between different take off tasks. Results: Dynamic characteristic showed significant differences in take-off (p < .001. This variability is caused by differences in kinematic parameters at the instant of touch-down, minimum joint angles and take-off. The most important finding was different variability in range of motion in eccentric or concentric phases of each jump. Vertically orientated jumps are terminated in a higher degree of extension. Horizontal take-off types are characterized by the highest ranges of motion especially in the ankle joint. Conclusions: The support lower limb compliance is adjusted to the required task, which is related to lower limb kinematics during the support phase. High range of motion in each joint refers to more compliant adjustment of the joint.

  13. Compound Wing Vertical Takeoff and Landing Small Unmanned Aircraft System

    Science.gov (United States)

    Logan, Michael J. (Inventor); Motter, Mark A. (Inventor); Deloach, Richard (Inventor); Vranas, Thomas L. (Inventor); Prendergast, Joseph M. (Inventor); Lipp, Brittney N. (Inventor)

    2017-01-01

    Systems, methods, and devices are provided that enable robust operations of a small unmanned aircraft system (sUAS) using a compound wing. The various embodiments may provide a sUAS with vertical takeoff and landing capability, long endurance, and the capability to operate in adverse environmental conditions. In the various embodiments a sUAS may include a fuselage and a compound wing comprising a fixed portion coupled to the fuselage, a wing lifting portion outboard of the fixed portion comprising a rigid cross member and a controllable articulating portion configured to rotate controllable through a range of motion from a horizontal position to a vertical position, and a freely rotating wing portion outboard of the wing lifting portion and configured to rotate freely based on wind forces incident on the freely rotating wing portion.

  14. Genome mining of mycosporine-like amino acid (MAA) synthesizing and non-synthesizing cyanobacteria: A bioinformatics study.

    Science.gov (United States)

    Singh, Shailendra P; Klisch, Manfred; Sinha, Rajeshwar P; Häder, Donat-P

    2010-02-01

    Mycosporine-like amino acids (MAAs) are a family of more than 20 compounds having absorption maxima between 310 and 362 nm. These compounds are well known for their UV-absorbing/screening role in various organisms and seem to have evolutionary significance. In the present investigation we tested four cyanobacteria, e.g., Anabaena variabilis PCC 7937, Anabaena sp. PCC 7120, Synechocystis sp. PCC 6803 and Synechococcus sp. PCC 6301, for their ability to synthesize MAA and conducted genomic and phylogenetic analysis to identify the possible set of genes that might be involved in the biosynthesis of these compounds. Out of the four investigated species, only A. variabilis PCC 7937 was able to synthesize MAA. Genome mining identified a combination of genes, YP_324358 (predicted DHQ synthase) and YP_324357 (O-methyltransferase), which were present only in A. variabilis PCC 7937 and missing in the other studied cyanobacteria. Phylogenetic analysis revealed that these two genes are transferred from a cyanobacterial donor to dinoflagellates and finally to metazoa by a lateral gene transfer event. All other cyanobacteria, which have these two genes, also had another copy of the DHQ synthase gene. The predicted protein structure for YP_324358 also suggested that this product is different from the chemically characterized DHQ synthase of Aspergillus nidulans contrary to the YP_324879, which was predicted to be similar to the DHQ synthase. The present study provides a first insight into the genes of cyanobacteria involved in MAA biosynthesis and thus widens the field of research for molecular, bioinformatics and phylogenetic analysis of these evolutionary and industrially important compounds. Based on the results we propose that YP_324358 and YP_324357 gene products are involved in the biosynthesis of the common core (deoxygadusol) of all MAAs.

  15. Wing and body motion and aerodynamic and leg forces during take-off in droneflies

    OpenAIRE

    Chen, Mao Wei; Zhang, Yan Lai; Sun, Mao

    2013-01-01

    Here, we present a detailed analysis of the take-off mechanics in droneflies performing voluntary take-offs. Wing and body kinematics of the insects during take-off were measured using high-speed video techniques. Based on the measured data, the inertia force acting on the insect was computed and the aerodynamic force of the wings was calculated by the method of computational fluid dynamics. Subtracting the aerodynamic force and the weight from the inertia force gave the leg force. In take-of...

  16. Fault analysis of mid-channel power takeoff in DCW MHD generators

    Science.gov (United States)

    Ishikawa, M.; Wu, Y. C. L.; Scott, M. H.

    1982-06-01

    Analysis is presented of the effect of loading faults on the mid-channel power takeoff of a diagonal-conducting-wall MHD generator in special loading schemes. Two-dimensional calculations indicate that an open-circuit condition in the upstream load circuit results in a large current density at the power takeoff anode and drives a shorting current over the interframe insulators at the cathode side. A short-circuit condition in the upstream load circuit results in a large current density at the power takeoff cathode and a shorting current over the interframe insulators at the anode side.

  17. Changes in long jump take-off technique with increasing run-up speed

    OpenAIRE

    Bridgett, LA; Linthorne, NP

    2006-01-01

    The aim of this study was to determine the influence of run-up speed on take-off technique in the long jump. Seventy-one jumps by an elite male long jumper were recorded in the sagittal plane by a high-speed video camera. A wide range of run-up speeds was obtained using direct intervention to set the length of the athlete's run-up. As the athlete's run-up speed increased, the jump distance and take-off speed increased, the leg angle at touchdown remained almost unchanged, and the take-off ang...

  18. A model for nocturnal frost formation on a wing section: Aircraft takeoff performance penalties

    Science.gov (United States)

    Dietenberger, M. A.

    1983-01-01

    The nocturnal frost formation on a wing section, to explain the hazard associated with frost during takeoff was investigated. A model of nocturnal frost formation on a wing section which predicts when the nocturnal frost will form and also its thickness and density as a function of time was developed. The aerodynamic penalities as related to the nocturnal frost formation properties were analyzed to determine how much the takeoff performance would be degraded by a specific frost layer. With an aircraft takeoff assuming equations representing a steady climbing flight, it is determined that a reduction in the maximum gross weight or a partial frost clearance and a reduction in the takeoff angle of attack is needed to neutralize drag and life penalities which are due to frost. Atmospheric conditions which produce the most hazardous frost buildup are determined.

  19. 77 FR 45922 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-08-02

    ... Vista TX--Rusty Allen, RNAV (GPS) RWY 15, Orig Robstown, TX, Nueces County, GPS RWY 13, Orig-C, CANCELED Robstown, TX, Nueces County, RNAV (GPS) RWY 13, Orig Robstown, TX, Nueces County, Takeoff Minimums...

  20. 77 FR 26669 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-05-07

    ...), ILS RWY 7R (SA CAT I), Amdt 3 Oneonta, AL, Robbins Field, RNAV (GPS) RWY 5, Orig Oneonta, AL, Robbins Field, RNAV (GPS) RWY 23, Orig Oneonta, AL, Robbins Field, Takeoff Minimums and Obstacle DP, Orig...

  1. Influence of determination of reference position of image on rocket take-off drift

    Science.gov (United States)

    Cui, Shuhua; Liu, Jun; Shen, Si; Hu, Shaolin

    2016-01-01

    Mathematical analysis model for influence of reference position deviation on carrier rocket take-off drift has been made to tackle the issue on determination of reference position of reticule for optical tracking and measurement of video image in aerospace test range and the variation in rocket take-off drift due to reference position deviation has been subjected to quantitative analysis based on angular error of tracking and lateral error of measuring point as a result of deviation of reference position of reticule cross. The method serves as technical support to quality analysis of rocket take-off deviation measurement data and improvement in data processing precision for carrier rocket take-off drift.

  2. Evaluation of perceived motion during a simulated take-off run

    NARCIS (Netherlands)

    Groen, E.L.; Clari, M.S.V. Valenti; Hosman, R.J.A.W.

    2001-01-01

    In de Nationale Simulator Faciliteit (NSF) werd bij een ervaren verkeersvlieger bepaald welke simulator bewegingen veriest zijn voor een realistische sensatie van lineaire versnelling tijdens een gesimuleerde take-off.

  3. 76 FR 28173 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-05-16

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... specified, as follows: PART 97--STANDARD INSTRUMENT APPROACH PROCEDURES 0 1. The authority citation for...

  4. 77 FR 37799 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-06-25

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... specified, as follows: PART 97--STANDARD INSTRUMENT APPROACH PROCEDURES 0 1. The authority citation for...

  5. 75 FR 60305 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-09-30

    ... Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA-200), FAA... citation for part 97 continues to read as follows: Authority: 49 U.S.C. 106(g), 40103, 40106, 40113,...

  6. 77 FR 45925 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-08-02

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... citation for part 97 continues to read as follows: Authority: 49 U.S.C. 106(g), 40103, 40106, 40113,...

  7. 76 FR 61040 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-10-03

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... citation for part 97 continues to read as follows: Authority: 49 U.S.C. 106(g), 40103, 40106, 40113,...

  8. 76 FR 25232 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-05-04

    ..., VOR/DME RWY 35, Orig-A, CANCELLED Lincoln Park, NJ, Lincoln Park, NDB RWY 1, Amdt 3, CANCELLED Clovis, NM, Clovis Muni, Takeoff Minimums and Obstacle DP, Orig Lima, OH, Lima Allen County, VOR RWY 28,...

  9. 77 FR 5694 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-02-06

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... large number of SIAPs, their complex nature, and the need for a special format make their verbatim...

  10. 78 FR 64170 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-10-28

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  11. 78 FR 64168 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-10-28

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  12. 77 FR 66536 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-11-06

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1.FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  13. 76 FR 70055 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-11-10

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  14. 77 FR 1013 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-01-09

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  15. 78 FR 25386 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-05-01

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... large number of SIAPs, their complex nature, and the need for a special format make their verbatim...

  16. 76 FR 65951 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-10-25

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  17. 78 FR 70491 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-11-26

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  18. 77 FR 56762 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-09-14

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  19. 78 FR 78714 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-12-27

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  20. 78 FR 43781 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-07-22

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  1. 78 FR 28133 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-05-14

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  2. 78 FR 68704 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-11-15

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  3. 76 FR 1355 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-01-10

    ... Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA-200), FAA..., and the need for a special format make their verbatim publication in the Federal Register expensive...

  4. 78 FR 50326 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-08-19

    ..., individual SIAP and Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA... number of SIAPs, their complex nature, and the need for a special format make their verbatim publication...

  5. 75 FR 8243 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-02-24

    ... Takeoff Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA-200), FAA..., and the need for a special format make their verbatim publication in the Federal Register expensive...

  6. 75 FR 72942 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-11-29

    ... on 8260-15A. The large number of SIAPs, Takeoff Minimums and ODPs, in addition to their complex...) RWY 27, Amdt 1 Koyukuk, AK, Dibvy, DIBVY TWO Graphic Obstacle DP Platinum, AK, Platinum, RNAV...

  7. 75 FR 65940 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-10-27

    ... on 8260-15A. The large number of SIAPs, Takeoff Minimums and ODPs, in addition to their complex... 2010 Platinum, AK, Platinum, RNAV (GPS) RWY 14, Amdt 1 St. Paul Island, AK, St. Paul Island, ILS OR...

  8. 76 FR 66179 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-10-26

    ...: Effective 17 NOV 2011 Troy, AL, Troy Muni, RADAR-1, Amdt 9 Show Low, AZ, Show Low Rgnl, RNAV (GPS) RWY 24...-Jackson Atlanta Intl, Takeoff Minimums and Obstacle DP, Amdt 4A Newton, KS, Newton-City-County,...

  9. Wing and body motion and aerodynamic and leg forces during take-off in droneflies.

    Science.gov (United States)

    Chen, Mao Wei; Zhang, Yan Lai; Sun, Mao

    2013-12-06

    Here, we present a detailed analysis of the take-off mechanics in droneflies performing voluntary take-offs. Wing and body kinematics of the insects during take-off were measured using high-speed video techniques. Based on the measured data, the inertia force acting on the insect was computed and the aerodynamic force of the wings was calculated by the method of computational fluid dynamics. Subtracting the aerodynamic force and the weight from the inertia force gave the leg force. In take-off, a dronefly increases its stroke amplitude gradually in the first 10-14 wingbeats and becomes airborne at about the 12th wingbeat. The aerodynamic force increases monotonously from zero to a value a little larger than its weight, and the leg force decreases monotonously from a value equal to its weight to zero, showing that the droneflies do not jump and only use aerodynamic force of flapping wings to lift themselves into the air. Compared with take-offs in insects in previous studies, in which a very large force (5-10 times of the weight) generated either by jumping legs (locusts, milkweed bugs and fruit flies) or by the 'fling' mechanism of the wing pair (butterflies) is used in a short time, the take-off in the droneflies is relatively slow but smoother.

  10. Usefulness and pitfalls of MAA SPECT/CT in identifying digestive extrahepatic uptake when planning liver radioembolization

    Energy Technology Data Exchange (ETDEWEB)

    Lenoir, Laurence; Garin, Etienne [Comprehensive Cancer Institute Eugene Marquis, Department of Nuclear Medicine, CS 44229, Rennes (France); University of Rennes 1, Rennes (France); Liver Metabolisms and Cancer, INSERM, U-991, Rennes (France); Edeline, Julien [University of Rennes 1, Rennes (France); Comprehensive Cancer Institute Eugene Marquis, Department of Medical Oncology, CS 44229, Rennes (France); Rolland, Yann [Comprehensive Cancer Institute Eugene Marquis, Department of Medical Imaging, CS 44229, Rennes (France); Pracht, Marc [Comprehensive Cancer Institute Eugene Marquis, Department of Medical Oncology, CS 44229, Rennes (France); Raoul, Jean-Luc [Comprehensive Cancer Institute Paoli Calmette, Department of Medical Oncology, Marseille (France); Ardisson, Valerie [Comprehensive Cancer Institute Eugene Marquis, Department of Nuclear Medicine, CS 44229, Rennes (France); Bourguet, Patrick [Comprehensive Cancer Institute Eugene Marquis, Department of Nuclear Medicine, CS 44229, Rennes (France); University of Rennes 1, Rennes (France); Clement, Bruno [Liver Metabolisms and Cancer, INSERM, U-991, Rennes (France); Boucher, Eveline [Liver Metabolisms and Cancer, INSERM, U-991, Rennes (France); Comprehensive Cancer Institute Eugene Marquis, Department of Medical Oncology, CS 44229, Rennes (France)

    2012-05-15

    Identifying gastroduodenal uptake of {sup 99m}Tc-macroaggregated albumin (MAA), which is associated with an increased risk of ulcer disease, is a crucial part of the therapeutic management of patients undergoing radioembolization for liver tumours. Given this context, the use of MAA single photon emission computed tomography (SPECT)/CT may be essential, but the procedure has still not been thoroughly evaluated. The aim of this retrospective study was to determine the effectiveness of MAA SPECT/CT in identifying digestive extrahepatic uptake, while determining potential diagnostic pitfalls. Overall, 139 MAA SPECT/CT scans were performed on 103 patients with different hepatic tumour types. Patients were followed up for at least 6 months according to standard requirements. Digestive, or digestive-like, uptake other than free pertechnetate was identified in 5.7% of cases using planar imaging and in 36.6% of cases using SPECT/CT. Uptake sites identified by SPECT/CT included the gastroduodenal region (3.6%), gall bladder (12.2%), portal vein thrombosis (6.5%), hepatic artery (6.5%), coil embolization site (2.1%) as well as falciform artery (5.0%). For 2.1% of explorations, a coregistration error between SPECT and CT imaging could have led to a false diagnosis by erroneously attributing an uptake site to the stomach or gall bladder, when the uptake actually occurred in the liver. SPECT/CT is more efficacious than planar imaging in identifying digestive extrahepatic uptake sites, with extrahepatic uptake observed in one third of scans using the former procedure. However, more than half of the uptake sites in our study were vascular in nature, without therapeutic implications. The risk of coregistration errors must also be kept in mind. (orig.)

  11. {sup 99m}Tc-labelled macroaggregated albumin (MAA) scintigraphy for planning treatment with {sup 90}Y microspheres

    Energy Technology Data Exchange (ETDEWEB)

    Lambert, Bieke; Mertens, Jeroen; Stienaers, Steven; D' Asseler, Yves [Ghent University Hospital, Department of Nuclear Medicine, Ghent (Belgium); Sturm, Emiel J.; Defreyne, Luc [Ghent University Hospital, Department of Interventional Radiology, Ghent (Belgium)

    2010-12-15

    {sup 90}Y microspheres are used for intra-arterial treatment of liver tumours. In the patient preparation, a hepatic angiogram is performed and all arteries that could transport microspheres from the targeted liver vasculature to extrahepatic organs are blocked. {sup 99m}Tc-labelled macroaggregated albumin (MAA) is injected intra-arterially to simulate the treatment and whole-body scintigraphy and single photon emission computed tomography (SPECT) of the abdomen are performed. Various aspects of lung shunt fraction (LSF) estimation were studied: interobserver and intrapatient variability, influence of scan quality and underlying disease. Secondly, the interobserver variability in reading the MAA SPECT of the abdomen was investigated. We reviewed 90 whole-body scans and 20 SPECT scans performed at our institution. Readers were blinded to each other's findings. Scoring the scan quality was based on the visualization of tracer degradation. The mean difference in LSF between the readers was 1%. In 1 of 23 patients who underwent repeated MAA injections a marked change in LSF was observed. No significant differences in LSF were recorded for primary versus secondary liver tumours. There was a correlation between scan quality and LSF, suggesting that low scan quality leads to overestimation of the LSF. Concordant results in ruling out the presence of extrahepatic tracer deposition were reached in 17 of 20 scans (85%). Interobserver and intrapatient variability in LSF calculation was limited. LSF was clearly dependent on scan quality. The underlying disease had no significant impact on the LSF. Interobserver variability for reading the MAA SPECT scans was acceptable. (orig.)

  12. Structural, thermal and optical properties of Cu$^{2+}$ doped methacrylic acid–ethyl acrylate (MAA:EA) copolymer films

    Indian Academy of Sciences (India)

    Y MADHAVA KUMAR; N O GOPAL; Ch RAMU; S BABU; J LAKSHMANA RAO; H NAGABHUSHANA; S C SHARMA

    2017-09-01

    Pure and Cu$^{2+}$ doped methacrylic acid–ethyl acrylate (MAA:EA) copolymer films were prepared using thesolution cast technique. The amorphous feature of the copolymer was depicted using X-ray diffraction scans and degreeof crystallinity was found to vary with increasing doping content. UV–Vis absorption spectra in the wavelength region200–900 nm were used to evaluate the optical properties like direct band gap, indirect band gap and absorption edge. Theoptical band gap decreased with the increase of mol% of Cu$^{2+}$ ions. Fourier transform infrared spectral studies on pureMAA:EA and Cu$^{2+}$ ions-doped films revealed the vibrational changes that occurred due to the effect of dopant salt inthe copolymer. Thermal properties of these films were investigated by employing differential scanning calorimetry andthermogravimetric analysis. The variation in film morphology was examined by scanning electron microscopy. Electronparamagnetic resonance (EPR) spectra of all the doped samples exhibited signals due to Cu2+ ions with the effective$g$-values $g_{\\parallel} = 2.177$ and $g_{\\perp} = 2.058$. The observed variation in the EPR signal intensity is due to the isolated and aggregated copper ions. The photoluminescence spectra of Cu$^{2+}$ ions-doped MAA:EA copolymer exhibited four emissionpeaks at 480 (blue), 579 (yellow), 604 (red) and 671nm (red).

  13. Synthesis of P(St-BA-MAA-SPAA) nano-latex and its application in high anti-corrisive coating

    Institute of Scientific and Technical Information of China (English)

    LIU Hai-feng; SHENG Ming-shuang; PAN Zhao-ji; QIU Da-jian; GUO Zhi-hua; GAN Fu-xing

    2008-01-01

    A novel zinc-rich pigment based on P(St-BA-MAA-SPAA) nano-latex was obtained, which is suitable for the use in hot alkali liquid medium. The nano-latex was synthesized by active emulsifier latex polymerization method with monomers of styrene(St), butylaerylate (BA), methylacrylic acid(MAA) in the presence of active emulsifier 3-sulfopropylaerylate(SPAA). The synthesis condition and properties of the latex were investigated. And the anti-corrosive property of the resultant zinc-rich coating was studied. The results show that the nano-latex is self-stabilized and has a narrow particle diameter distribution, the average diameter of the latex particles is 71 nm. Zinc powders can be evenly dispersed in the nano-latex, which indicates that the P(St-BA-MAA-SPAA)nano latex can be used as the binder of zinc-rich coating. The resultant zinc-rich coating is able to resist the invasion of hot alkali solution(the temperature is 95 ℃ and the pH value is 14) for 480 h and the exposure time in salt spray is 1 200 h. Moreover, the coating shows good thermal conductivity and static electricity properties, its thermal conductivity and electric resistivity are 21-37 W/(m·K) and 6.7×105-3.5×106 Ω.cm, respectively

  14. Response to ``Comment on `Identification of low order manifolds: Validating the algorithm of Maas and Pope''' [Chaos 16, 048101 (2006)

    Science.gov (United States)

    Rhodes, Carl; Morari, Manfred; Wiggins, Stephen

    2006-12-01

    Flockerzi and Heineken [Chaos 16, 048101 (2006)] present two examples with the goal of elucidating issues related to the Maas and Pope method for identifying low dimensional "slow" manifolds in systems with a time-scale separation. The goal of their first example is to show that the result claimed by Rhodes et al. [Chaos 9, 108-123 (1999)] that the Maas and Pope algorithm identifies the slow invariant manifold in the situation in which there is finite time-scale separation is incorrect. We show that their arguments result from an incomplete understanding of the situation and that, in fact, their example supports, and is completely consistent with, the result in Rhodes et al.. Their second example claims to be a counterexample to a conjecture in Rhodes et al. that away from the slow manifold the criterion of Maas and Pope [Combust. Flame 88, 239-264 (1992)] will never be fulfilled. While this conjecture may indeed be false, we argue that it is not clear that the example presented by Flockerzi and Heineken is indeed a counterexample.

  15. Hollandi paviljon Hannoveri maailmanäitusel EXPO 2000 : Uus Loodus = Dutch Pavilion at EXPO 2000 in Hannover : New Nature / Winy Maas, Jacob van Rijs, Nathalie de Vries

    Index Scriptorium Estoniae

    Maas, Winy

    2000-01-01

    Hollandi paviljon - näide looduse ja tehnoloogia segunemisest. Projekteerija: MVRDV. Arhitektid Winy Maas, Jacob van Rijs, Nathalie de Vries; kaasa töötasid Stefan Witteman, Jaap van Dijk, Chrisoph Schindler, Kristina Adsersen, Rüdiger Kreiselmayer

  16. Predicting tumor response in patient with metastatic liver cancer to hepatic artery infusion chemotherapy. Evaluation with {sup 99m}Tc-MAA SPECT hepatic artery perfusion scintigraphy

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Linfeng; Nakagawa, Tetsuya; Higashi, Kotaro; Okimura, Tetsuro; Yamamoto, Itaru [Kanazawa Medical Univ., Uchinada, Ishikawa (Japan)

    1996-09-01

    {sup 99m}Tc-MAA planar and SPECT hepatic artery perfusion scintigraphy were performed in 25 patients with metastatic liver cancer. A total of 42 metastatic nodules were evaluated on SPECT. Twenty five of 42 metastatic nodules showed positive uptake; 17 showed negative uptake. The results indicate that there is no significant quantitative correlation between the {sup 99m}Tc-MAA uptake ratio of metastatic nodules and the regression of metastatic nodules determined by CT scan. However, there is a statistically significant difference in the regression of metastatic nodule between the {sup 99m}Tc-MAA of uptake positive group and negative group. It means that a positive uptake of {sup 99m}Tc-MAA of tumor predicts a trend of better response to chemotherapy. (author)

  17. Tallinna sadama ümbruse maa-ala renoveerimise ideekonkurss 1996 = The area around the port of Tallinn : contest for renovation ideas 1996 / Veljo Kaasik

    Index Scriptorium Estoniae

    Kaasik, Veljo

    1999-01-01

    Tallinna sadamapiirkonnast. Linnaehituslik ideekava Tallinna kesklinna sadama ümbruse maa-ala renoveerimiseks (ideekonkursi võistlustöö arhitektuurne osa, 1996). Autorid: A. Alver, V. Kaasik, T. Trummal. Kaasautorid: T. Laht, S. Koppel, U. Mets

  18. Hollandi paviljon Hannoveri maailmanäitusel EXPO 2000 : Uus Loodus = Dutch Pavilion at EXPO 2000 in Hannover : New Nature / Winy Maas, Jacob van Rijs, Nathalie de Vries

    Index Scriptorium Estoniae

    Maas, Winy

    2000-01-01

    Hollandi paviljon - näide looduse ja tehnoloogia segunemisest. Projekteerija: MVRDV. Arhitektid Winy Maas, Jacob van Rijs, Nathalie de Vries; kaasa töötasid Stefan Witteman, Jaap van Dijk, Chrisoph Schindler, Kristina Adsersen, Rüdiger Kreiselmayer

  19. Tallinna sadama ümbruse maa-ala renoveerimise ideekonkurss 1996 = The area around the port of Tallinn : contest for renovation ideas 1996 / Veljo Kaasik

    Index Scriptorium Estoniae

    Kaasik, Veljo

    1999-01-01

    Tallinna sadamapiirkonnast. Linnaehituslik ideekava Tallinna kesklinna sadama ümbruse maa-ala renoveerimiseks (ideekonkursi võistlustöö arhitektuurne osa, 1996). Autorid: A. Alver, V. Kaasik, T. Trummal. Kaasautorid: T. Laht, S. Koppel, U. Mets

  20. Preparation and Performance of P(MAA-co-DMA) Polyampholyte Microgels%P(MAA-co-DMA)两性电解质微凝胶的制备与性能

    Institute of Scientific and Technical Information of China (English)

    申迎华; 李晓琴; 刘慧敏; 树学峰; 刘妙青; 张林香

    2011-01-01

    以甲基丙烯酸(MAA)和甲基丙烯酸二甲氨基乙酯(DMA)为单体,N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,采用反相微乳液聚合法制备了一系列不同单体物质的量比的聚两性电解质微凝胶P(MAA-co-DMA).通过傅里叶红外光谱(FT-IR)、电位与电导滴定、动态光散射(DLS)及紫外可见分光光度法等测试手段对其进行表征与分析.研究结果表明,P(MAA-co-DMA)为两性聚合物,其实际组成与投料比一致;在低和高pH值范围,微凝胶粒子处于溶胀状态,在等电点(IEP)附近,粒子收缩,微观结构变得紧密,IEP值与理论预测值相比有所偏移;随着pH值的变化,微凝胶分散液透光率变化不明显.%A series of polya mpholyte microgel particles with different mole percentages of monomers, containing both methacrylic acid (MAA) and 2-(dimethylamino) ethyl methacrylate (DMA), were prepared by inverse microemulsion polymerization. N,N'- methylenebisacrylamide(MBA) was used as crosslinker. The particles were characterized through Fourier tmnsform infrared spectrophotometer (FT-IR), potentiometric and conductometric titration, dynamic light scattering (DLS) and UV vis spectrophotometry. The results confirm P(MAA-co-DMA) is the amphoteric polymer. The actual compositions of the microgel systems show good agreement with feed ratio. The microgel swells at low and high pH and possesses a compact structurenear the isoelectric point (IEP), shift occurs between the observed IEP values with theoretical IEP. Changes in microgel dispersion trans mittance is slightly at different pH.

  1. Specificity of mimotope-induced anti-high molecular weight-melanoma associated antigen (HMW-MAA antibodies does not ensure biological activity.

    Directory of Open Access Journals (Sweden)

    Julia Latzka

    Full Text Available Vaccines based on peptide mimics (mimotopes of conformational tumor antigen epitopes have been investigated for a variety of human tumors including breast cancer, tumors expressing the carcinoembryonic antigen, B cell lymphoma, neuroblastoma, and melanoma. In our previous work, we designed a vaccine based on a mimotope of the high molecular weight-melanoma associated antigen (HMW-MAA that elicited HMW-MAA-specific antibodies (Abs with anti-tumor activity in vitro and in vivo. In this study, we aimed to identify mimotopes of additional distinct HMW-MAA epitopes, since they could be used to construct a polymimotope melanoma vaccine. For this purpose, random peptide phage libraries were screened with the anti-HMW-MAA monoclonal antibodies (mAbs VT80.12 and VF1-TP43 yielding one peptide ligand for each mAb. Both peptides inhibited the binding of the corresponding mAb to the HMW-MAA. Furthermore, when coupled to the carrier protein keyhole limpet hemocyanin (KLH, both HMW-MAA mimotopes elicited peptide-specific Abs in rabbits or BALB/c mice, but only the mimotope isolated with the mAb VT80.12 elicited HMW-MAA-specific Abs and only in mice. However, the latter Abs had no detectable effect on HMW-MAA expressing human melanoma cells in vitro. These results describe limitations related to the phage display technique and emphasize the need to characterize the functional properties of the mAb utilized to isolate mimotopes of the corresponding epitopes.

  2. Improved diagnostic accuracy of lung perfusion imaging using Tc-99m MAA SPECT

    Energy Technology Data Exchange (ETDEWEB)

    O' Donnell, J.K.; Golish, J.A.; Go, R.T.; Risius, B.; Graor, R.A.; MacIntyre, W.J.; Feiglin, D.H.

    1984-01-01

    The addition of emission tomography (SPECT) to pulmonary perfusion imaging should improve diagnostic accuracy by detecting perfusion defects otherwise masked by superimposition of normal lung activity and by reducing problems with interpretation of defects that result from overlying soft tissue or pleural effusions. In order to examine the contribution of SPECT in the scintigraphic evaluation for pulmonary embolus (PE), the authors have obtained both planar and SPECT studies in 94 cases of suspected PE. All studies employed 3-4 mCi of Tc-99m MAA and standard six-view planar image acquisition. SPECT raw data of 64 images were then acquired over a 360 degree transaxial rotation with subsequent computer reconstruction. Xe-133 ventilation studies were performed when clinically indicated and tolerated by the patient. For 19 studies angiographic (AN) correlation was obtained within 24 hours. In 16/19 planar and SPECT both gave a high probability of PE but SPECT gave better segmental localization and showed better agreement with the number of defects seen at AN. In 3 indeterminate planar scans, 2 were low probability with SPECT and had negative AN. The third, a patient with Wegener's vasculitis, remained indeterminate with SPECT and had negative AN. Five patients with PE had repeat planar/SPECT/AN studies to evaluate response to treatment. SPECT correlated better with AN findings in each case. The authors conclude that SPECT perfusion imaging provides better anatomic accuracy for defects representing PE and is the non-invasive technique of choice for documenting response to therapy.

  3. "Sügis on salali maa peale laskumas..." : [luuletused] / Maksõm Rõlski ; tlk. Harald Rajamets

    Index Scriptorium Estoniae

    Rõlski, Maksõm

    2004-01-01

    Sisu: "Sügis on salali maa peale laskumas..." ; "Küpsenud on õunad, punetavad õunad..." ; "Möödas on kõu, mähib maad magus raugus ja hõngab..." ; "Siin kõrgel on vaid kivi, karm ja vaik..." ; "Ühtäkki kardin õõtsus aknasuul..." ; "Lõksatas lukku mu uks. Taas töötama toa rahus üksi..." ; "Haab väriseb, ning tüve hõbedase..." ; "Erootika on väsitanud mind..." ; Kolm meest paadis (rääkimata koerast) ; "Ürglaanes, kus on üksnes loomarajad..." ; "Tuul peksab külmi aknaid jäisel uhal..." ; "Näe, hirmuähmis pageb lambakari..." ; Ausammas ; Haned ; "Kord katab laotust pilv ja paiskab piisku alla..." ; Sadamasillal ; "Oo vaikne sadam sa, mu töölaud, reisi eel ..." ; Chopin ; "Kevad suitsedes on teel ..." ; "Laht tukub, päikses roheliselt särav..." ; "Öösse nagu kaevuvette..." ; "Jõeluhalt kõlas vileviis..." ; Lumikelluke torkas salus..." ; "Ja meenus (aknasse lõi kerge tuul ja lõhnav pimedus) üks pilt, nii kauge..." ; "Glütsiiniatel tung on ikka kõrgemale..." ; Tasa ; Sügisele ; Äike ; Öökülm ; Sonett ; "Ikka tuleb habras õhtu meelde..." ; Flamingod ; Notre Dame ; Aadria meri ; "Mets on hõbesulgses suitsuvines..." ; Kuis ma ei armastaks... ; Luulekunst ; "Käod lahkumist kukkusid kaugel..." ; "Kui mõnus elada on sel..." ; Kiir ; "Ju kustus õhtu punav lee..."

  4. Multi-body dynamic system simulation of carrier-based aircraft ski-jump takeoff

    Institute of Scientific and Technical Information of China (English)

    Wang Yangang; Wang Weijun; Qu Xiangju

    2013-01-01

    The flight safety is threatened by the special flight conditions and the low speed of carrier-based aircraft ski-jump takeoff.The aircraft carrier motion,aircraft dynamics,landing gears and wind field of sea state are comprehensively considered to dispose this multidiscipline intersection problem.According to the particular naval operating environment of the carrier-based aircraft ski-jump takeoff,the integrated dynamic simulation models of multi-body system are developed,which involves the movement entities of the carrier,the aircraft and the landing gears,and involves takeoff instruction,control system and the deck wind disturbance.Based on Matlab/Simulink environment,the multi-body system simulation is realized.The validity of the model and the rationality of the result are verified by an example simulation of carrier-based aircraft ski-jump takeoff.The simulation model and the software are suitable for the study of the multidiscipline intersection problems which are involved in the performance,flight quality and safety of carrier-based aircraft takeoff,the effects of landing gear loads,parameters of carrier deck,etc.

  5. Correlation of climbing perception and eye movements during daytime and nighttime takeoffs using a flight simulator.

    Science.gov (United States)

    Tamura, Atsushi; Wada, Yoshiro; Shimizu, Naoki; Inui, Takuo; Shiotani, Akihiro

    2016-01-01

    This study suggests that the subjective climbing perception can be quantitatively evaluated using values calculated from induced eye movements, and the findings may aid in the detection of pilots who are susceptible to spatial disorientation in a screening test. The climbing perception experienced by a pilot during takeoff at night is stronger than that experienced during the day. To investigate this illusion, this study assessed eye movements and analyzed their correlation with subjective climbing perception during daytime and nighttime takeoffs. Eight male volunteers participated in this study. A simulated aircraft takeoff environment was created using a flight simulator and the maximum slow-phase velocities and vestibulo-ocular reflex gain of vertical eye movements were calculated during takeoff simulation. Four of the eight participants reported that their perception of climbing at night was stronger, while the other four reported that there was no difference between day and night. These perceptions were correlated with eye movements; participants with a small difference in the maximum slow-phase velocities of their downward eye movements between daytime and nighttime takeoffs indicated that their perception of climbing was the same under the two conditions.

  6. Study on in vitro drug release behavior P (EG-MAA-MEG) pH sensitive hydrogels%P(CE-MAA-MEG)pH敏感性水凝胶的体外释放药物行为考察

    Institute of Scientific and Technical Information of China (English)

    郑施施; 王增寿

    2012-01-01

    目的:研究一种P(EG-MAA-MEG) pH敏感性水凝胶在口服药物传输体系中的应用.方法:本文采用自由基聚合方法制备一种具有良好pH响应性能的水凝胶,并对其pH响应性能进行相关的表征.以维生素B12(VB12)为模型药物,考察载药水凝胶在不同pH环境条件下(pH 1.2和pH 7.4)的药物释放行为.结果:P(EG-MAA-MEG) pH敏感水凝胶具有明显的孔洞结构和良好的pH响应性能,在中性磷酸盐缓冲溶液(pH 7.4)中吸水率显著大于在酸性溶液(pH 1.2)中的吸水率.装载维生素B12的pH敏感水凝胶在中性磷酸盐缓冲溶液(pH 7.4)中的8h的药物累计释放率达到50%,而在酸性溶液(pH1.2)中的8h的药物累计释放率只有30%左右.结论:可生物降解P(EG-MAA-MEG) pH敏感性水凝胶具有良好的pH敏感性和药物缓控释性能,在口服结肠靶向给药体系中有一定的应用前景.%OBJECTIVE To study of the P (EG-MAA-MEG) pH sensitive hydrogels for the application in oral drug delivery system. METHODS Using free radical polymerization method to develop a good pH response properties of the hydrogel, and the pH response performance were characterized. Using vitamin B12 as a model drug, the dnug release behavior of hydrogel at different pH conditions (pH I. 2 and pH 7. 4) was examined. RESULTS P (EG-MAA-MEG) pH sensitive hydrogels with visible hole structure and good pH response performance,in neutral phosphate buffer solution (pH 7. 4) in water absorption rate was significantly higher than that in acidic solution ( pH I, 2) in the rate of water absorption . Containing vitamin B12 pH sensitive hydrogels in neutral phosphate buffer solution ( pH 7. 4) ,the 8 h drug accumulative release rate reached 50%,m an acidic solution ( pH 1. 2),the 8 h drug accumulative release rate of only about 30% . CONCLUSION Biodegradable P (EG-MAA-MEG) pH sensitive hydrogel has good pH sensitivity and controlled drug release properties, in oral drug delivery system it has

  7. The EMG activity and mechanics of the running jump as a function of takeoff angle.

    Science.gov (United States)

    Kakihana, W; Suzuki, S

    2001-10-01

    To characterize the electromyographic (EMG) activity, ground reaction forces, and kinematics were used in the running jump with different takeoff angles. Two male long jumpers volunteered to perform running jumps at different approach speeds by varying the number of steps (from 3 to 9) in the run-up. Subject TM achieved a greater vertical velocity of the center of gravity (CG) at takeoff for all approach distances. This jumping strategy was associated with greater backward trunk lean at touchdown and takeoff, a lesser range of motion for the thigh during the support phase, more extended knee and ankle angles at touchdown, and a more flexed knee angle at takeoff. Accompanying these differences in kinematics, TM experienced greater braking impulses and lesser propulsion impulses for the forward-backward component of the ground reaction force. Furthermore, TM activated mainly the rectus femoris, vastus medialis, lateral gastrocnemius, and tibialis anterior, while if rarely activated the biceps femoris from just before contact to roughly the first two-thirds of the support phase. These results indicate that TM used a greater takeoff angle in the running jump because he enabled and sustained a greater blocking effect via the coordination patterns of the muscles relative to the hip, knee, and ankle joints. These findings also suggest that the muscle activities recorded in the present experiment are reflected in kinematics and kinetics. Further, the possible influence of these muscle activities on joint movements in the takeoff leg, and their effect on the vertical and/or horizontal velocity of the jump are discussed.

  8. Measurement of Required Power with Human-Powered Aircraft in Take-off Ground Running

    Science.gov (United States)

    Yoshikawa, Toshiaki; Sakamoto, Shinsuke; Hori, Kotono; Kusumoto, Hiroshi; Yamamoto, Yasushi; Hattori, Takashi; Sata, Kouta

    In this paper, we propose the method for the measurement of required power and the adjustment of optimum gear ratio in take-off ground running. To get the values of required power and speed, we measured torque of the left side and the right side of pedals, RPM of pedals, and speed of the cockpit frame. In order to improve the take-off speed, some drums were applied, and the optimum gear ratio of the front drum to the rear drum was determined.

  9. Description of the Power Take-off System on board the Wave Dragon Prototype

    DEFF Research Database (Denmark)

    Kofoed, Jens Peter; Frigaard, Peter; Knapp, Wilfried

    2005-01-01

    The paper describes the power take-off system of the overtopping based wave energy converter Wave Dragon (WD). Focus is put on the hydro turbine arrangement used for the extraction of the potential energy in the water obtained by wave overtopping of the ramp into the reservoir.......The paper describes the power take-off system of the overtopping based wave energy converter Wave Dragon (WD). Focus is put on the hydro turbine arrangement used for the extraction of the potential energy in the water obtained by wave overtopping of the ramp into the reservoir....

  10. Controlled release from thermo-sensitive PNVCL-co-MAA electrospun nanofibers: The effects of hydrophilicity/hydrophobicity of a drug.

    Science.gov (United States)

    Liu, Lin; Bai, Shaoqing; Yang, Huiqin; Li, Shubai; Quan, Jing; Zhu, Limin; Nie, Huali

    2016-10-01

    The thermo-sensitive copolymer poly(N-vinylcaprolactam-co-methacrylic acid) (PNVCL-co-MAA) was synthesized by free radical polymerization and the resulting nanofibers were fabricated using an electrospinning process. The molecular weight of the copolymer was adjusted by varying the content of methacrylic acid (MAA) while keeping that of N-vinylcaprolactam (NVCL) constant. Hydrophilic captopril and hydrophobic ketoprofen were used as model drugs, and PNVCL-co-MAA nanofibers were used as the drug carrier to investigate the effects of drug on its release properties from nanofibers at different temperatures. The results showed that slow release over several hours was observed at 40°C (above the lower critical solution temperature (LCST) of PNVCL-co-MAA), while the drugs exhibited a burst release of several seconds at 20°C (below the LCST). Drug release slowed with increasing content of the hydrophobic monomer NVCL. The hydrophilic captopril was released at a higher rate than the hydrophobic ketoprofen. The drug release characteristics were dependent on the temperature, the portion of hydrophilic groups and hydrophobic groups in the copolymer and hydrophilicity/hydrophobicity of drug. Study on the mechanism of release showed that Korsmeyer-Peppas model as a major drug release mechanism. Given these results, the PNVCL-co-MAA copolymers are proposed to have useful applications in intellectual drug delivery systems.

  11. Comparison between effects of free curcumin and curcumin loaded NIPAAm-MAA nanoparticles on telomerase and PinX1 gene expression in lung cancer cells.

    Science.gov (United States)

    Badrzadeh, Fariba; Akbarzadeh, Abolfazl; Zarghami, Nosratollah; Yamchi, Mohammad Rahmati; Zeighamian, Vahide; Tabatabae, Fateme Sadate; Taheri, Morteza; Kafil, Hossein Samadi

    2014-01-01

    Herbal compounds such as curcumin which decrease telomerase and gene expression have been considered as beneficial tools for lung cancer treatment. In this article, we compared the effects of pure curcumin and curcumin-loaded NIPAAm-MAA nanoparticles on telomerase and PinX1 gene expression in a lung cancer cell line. A tetrazolium-based assay was used for determination of cytotoxic effects of curcumin on the Calu-6 lung cancer cell line and telomerase and pinX1 gene expression was measured with real-time PCR. MTT assay showed that Curcumin-loaded NIPAAm-MAA inhibited the growth of the Calu-6 lung cancer cell line in a time and dose-dependent manner. Our q-PCR results showed that the expression of telomerase gene was effectively reduced as the concentration of curcumin-loaded NIPAAm-MAA increased while expression of the PinX1 gene became elevated. The results showed that curcumin- loaded- NIPAAm-MAA exerted cytotoxic effects on the Calu-6 cell line through down-regulation of telomerase and stimulation of pinX1 gene expression. NIPPAm-MAA could be good carrier for such kinds of hydrophobic agent.

  12. The Performance and Release Application of Polyampholyte Microgels P(MAA-co-DEA)%聚两性电解质微凝胶P(MAA-co-DEA)的性能及其释放行为

    Institute of Scientific and Technical Information of China (English)

    任燕妮; 申迎华; 张文新; 郭兴梅; 刘旭光

    2013-01-01

    以甲基丙烯酸(MAA)和甲基丙烯酸二乙氨基乙酯(DEA)为单体,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,聚乙二醇单甲基丙烯酸酯(PEGMA)为大分子稳定剂,采用反相微乳液聚合方法制备了pH响应性聚两性电解质微凝胶P(MAA-co-DEA).利用透射电镜、动态光散射对其形貌与溶胀性能进行了表征;以牛血清白蛋白(BSA)为模拟药物,用紫外分光光度法考察了交联剂用量、pH值及离子强度对微凝胶释放行为的影响,初步研究了其释放机理.结果表明:微凝胶在低pH或高pH下的流体力学直径及溶胀率均比等电点处(IEP)的大;BSA的释放与交联剂用量有关,且有最佳用量值;BSA的释放率在pH=5的缓冲溶液中不到10%,而在pH=9的缓冲溶液中,释放率可达65%左右;释放率随着离子强度的增加而减小;微凝胶对BSA的释放主要由微凝胶的溶胀及BSA的扩散作用引起.%Inverse microemulsion polymerization of methacrylic acid (MAA) and 2-(diethyl-amino) ethyl-methacrylate (DEA) yielded pH-responsive polyampholyte microgels P (MAA-co-DEA).The morphology and swelling performance were characterized by means of transmission electron microscopy,dynamic light scattering and UV-vis spectrophotometry.Bovine serum albumin (BSA) was used as a kind of model drug and the release behavior of P(MAA-co-DEA) was studied.These microgels showed enhanced hydrophilic behavior in aqueous medium at low and high pH,their hydrodynamic diameter (Dh) was 100 nm at isoelectric pH and increased to 180~260 nm at pH 2 or 12.By varying the pH of solution and the content of MBA in the microgel,it was possible to vary the hydrodynamic diameter and swelling ratio.The microgel absorbed BSA with slow and controlled release.The compound hardly released the BSA at pH=5,but the release quantity reached 65% at pH=3 or 9 and the release behavior reached balance within 24 h.The pH and cross-linking degree affected the release rate and release

  13. Modulation of MAA-induced apoptosis in male germ cells: role of Sertoli cell P/Q-type calcium channels

    Directory of Open Access Journals (Sweden)

    Aguanno Salvatore

    2005-04-01

    Full Text Available Abstract Spontaneous germ cell death by apoptosis occurs during normal spermatogenesis in mammals and is thought to play a role in the physiological mechanism limiting the clonal expansion of such cell population in the male gonad. In the prepubertal rat testis, the most conspicuous dying cells are pachytene spermatocytes, which are also the primary target of the apoptosis experimentally induced by the methoxyacetic acid (MAA. Since we have recently reported that Sertoli cells, the somatic component of the seminiferous epithelium, regulate not only germ cell viability and differentiation but also their death, we have further investigated the mechanism involved in such a control. In this paper we have used the protein clusterin, produced by Sertoli cells and associated with tissue damage or injury, as indicator of germ cell apoptosis in rat seminiferous tubules treated with MAA in the presence or in the absence of omega-agatoxin, a specific inhibitor of P/Q type voltage-operated calcium channels (VOCC's. We performed both a qualitative analysis of clusterin content and germ cell apoptosis by immunofluorescence experiments and a quantitative analysis by in situ end labelling of apoptotic germ cells followed by flow cytometry. The results obtained demonstrate that Sertoli cells modulate germ cell apoptosis induced by methoxyacetic acid also throughout the P/Q-type VOCC's.

  14. 76 FR 47985 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-08-08

    ..., CA, McClellan-Palomar, ILS OR LOC/DME RWY 24, Amdt 9 Carlsbad, CA, McClellan-Palomar, RNAV (RNP) Z RWY 24, Orig Carlsbad, CA, McClellan-Palomar, VOR-A, Amdt 8 Long Beach, CA, Long Beach/Daugherty Field... Minimums and Obstacle DP, Amdt 5 Charleston, SC, Charleston AFB/Intl, Takeoff Minimums and Obstacle...

  15. 76 FR 64005 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-10-17

    ... Policies and Procedures (44 FR 11034; February 26,1979); and (3) does not warrant preparation of a... Minimums and Obstacle DP, Orig Red Wing, MN, Red Wing Rgnl, RNAV (GPS) RWY 27, Amdt 2B Malta, MT, Malta, RNAV (GPS) RWY 8, Amdt 1 Malta, MT, Malta, RNAV (GPS) RWY 26, Amdt 1 Malta, MT, Malta, Takeoff...

  16. 77 FR 12452 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-03-01

    ..., Billings Logan Intl, ILS OR LOC RWY 10L, Amdt 25 Billings, MT, Billings Logan Intl, RNAV (GPS) RWY 10L, Amdt 2 Billings, MT, Billings Logan Intl, RNAV (GPS) RWY 28R, Amdt 2 Billings, MT, Billings Logan Intl, Takeoff Minimums & Obstacle DP, Amdt 6 Billings, MT, Billings Logan Intl, VOR-A, Amdt 2 Billings, MT...

  17. 75 FR 51663 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-08-23

    ... impractical. Furthermore, airmen do not use the regulatory text of the SIAPs, Takeoff Minimums or ODPs, but... a regulatory evaluation as the anticipated impact is so minimal. For the same reason, the FAA..., Summerville, RNAV (GPS) RWY 24, Orig-A Corpus Christi, TX, Corpus Christi Intl, RNAV (GPS) Y RWY 13, Amdt...

  18. Increasing Functional Variability in the Preparatory Phase of the Takeoff Improves Elite Springboard Diving Performance

    Science.gov (United States)

    Barris, Sian; Farrow, Damian; Davids, Keith

    2014-01-01

    Purpose: Previous research demonstrating that specific performance outcome goals can be achieved in different ways is functionally significant for springboard divers whose performance environment can vary extensively. This body of work raises questions about the traditional approach of balking (terminating the takeoff) by elite divers aiming to…

  19. BIODYNAMICAL PROFIL OF THE TAKE-OFF ACTION IN HIGH JUMP

    Directory of Open Access Journals (Sweden)

    Milan Čoh

    2010-09-01

    Full Text Available The aim of this study was to identify the key dynamic and kinematic parameters of the take-off action in the high jump. The authors studied a single elite athlete (personal record 2.31m using a direct measurement method, i.e. a force plate, to measure the dynamic parameters and a synchronised 3D video system to measure the kinematic parameters. They were able to collect and calculate data on 49 variables. Given that the study was focused on just one athlete, generalisation of the results can only be limited. However, this was a very specific experiment where the results clearly have theoretical and practical value for biomechanical research of high jump technique modelling. Their findings include that the jumper studied developed the highest ground reaction force in the eccentric phase of the take-off. The ground reaction force in the vertical direction exceeded his body weight by 5.6 times. In the concentric phase, the maximum ground reaction force was 9% lower than in the eccentric phase. They were also able to identify large ground reaction forces in the horizontal and lateral directions, which are manifested in extreme loading on the ankle joint of the jumper’s take-off leg during the take-off action.

  20. EMG activities and plantar pressures during ski jumping take-off on three different sized hills.

    Science.gov (United States)

    Virmavirta, M; Perttunen, J; Komi, P V

    2001-04-01

    Different profiles of ski jumping hills have been assumed to make the initiation of take-off difficult especially when moving from one hill to another. Neuromuscular adaptation of ski jumpers to the different jumping hills was examined by measuring muscle activation and plantar pressure of the primary take-off muscles on three different sized hills. Two young ski jumpers volunteered as subjects and they performed several trials from each hill (K-35 m, K-65 m and K-90 m) with the same electromyographic (EMG) electrode and insole pressure transducer set-up. The results showed that the differences in plantar pressure and EMGs between the jumping hills were smaller than expected for both jumpers. The small changes in EMG amplitudes between the hills support the assumption that the take-off was performed with the same intensity on different jumping hills and the timing of the gluteus EMG demonstrates well the similarity of the muscle activation on different hills. On the basis of the results obtained it seems that ski jumping training on small hills does not disturb the movement patterns for bigger hills and can also be helpful for special take-off training with low speed.

  1. 77 FR 37801 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-06-25

    ... Takeoff Minimums and textual ODP amendments may have been issued previously by the FAA in a Flight Data... Minimums and ODPs, and safety in air commerce, I find that notice and public procedures before adopting..., Dothan Rgnl, RNAV (GPS) RWY 36, Amdt 1 Dothan, AL, Dothan Rgnl, VOR OR TACAN-A, Amdt 13 Mobile, AL...

  2. Behaviour of Coconut Mites Preceding Take-off to Passive Aerial Dispersal

    NARCIS (Netherlands)

    Melo, J.W.S.; Lima, D.B.; Sabelis, M.W.; Pallini, A.; Gondim Jr., M.G.C.

    2014-01-01

    For more than three decades the coconut mite Aceria guerreronis Keifer is one of the most important pests of coconut palms and has recently spread to many coconut production areas worldwide. Colonization of coconut palms is thought to arise from mites dispersing aerially after take-off from other pl

  3. 78 FR 70494 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-11-26

    ... 14 CFR Part 97 [Docket No. 30929; Amdt. No. 3564] Standard Instrument Approach Procedures, and... Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure... from: 1. FAA Public Inquiry Center (APA-200), FAA Headquarters Building, 800 Independence Avenue...

  4. 76 FR 28171 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-05-16

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations..., Cheboygan County, RNAV (GPS) RWY 10, Amdt 2 Spearfish, SD, Black Hills-Clyde Ice Field, Takeoff Minimum and..., Panguitch Muni, RNAV (GPS) RWY 18, Orig Panguitch, UT, Panguitch Muni, RNAV (GPS) RWY 36, Orig Panguitch, UT...

  5. 75 FR 42308 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-07-21

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations..., Kissimmee Gateway, RNAV (GPS) RWY 15, Amdt 1 Orlando, FL, Kissimmee Gateway, RNAV (GPS) RWY 33, Amdt 1..., Klawock, Takeoff Minimums and Obstacle DP, Amdt 3 Lincoln, CA, Lincoln Rgnl/Karl Harder Field, GPS RWY 15...

  6. 75 FR 55963 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-09-15

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... Muni, Takeoff Minimums and Obstacle DP, Orig Arcata/Eureka, CA, Arcata, RNAV (GPS) RWY 32, Orig-B Bakersfield, CA, Meadows Field, RNAV (GPS) RWY 12L, Amdt 1A Titusville, FL, Space Coast Rgnl, ILS OR LOC RWY...

  7. 77 FR 24369 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-04-24

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... Muni, GPS RWY 1, Orig-A, CANCELLED Oroville, CA, Oroville Muni, RNAV (GPS) RWY 1, Orig Oroville, CA... County, Takeoff Minimums and Obstacle DP, Amdt 1 Punta Gorda, FL, Punta Gorda, RNAV (GPS) RWY 4, Amdt 1...

  8. 75 FR 12977 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-03-18

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... 2010 Auburn, CA, Auburn Muni, Takeoff Minimums and Obstacle DP, Amdt 1 Columbia, CA, Columbia, GPS RWY 35, Orig, CANCELLED Columbia, CA, Columbia, RNAV (GPS) RWY 35, Orig Lakeport, CA, Lampson Field...

  9. 77 FR 22475 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-04-16

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe..., Gillespie Field, RNAV (GPS) RWY 17, Amdt 2 Danbury, CT, Danbury Muni, Takeoff Minimums and Obstacle DP, Amdt 4 Rensselaer, IN, Jasper County, GPS RWY 18, Orig-A, CANCELLED Rensselaer, IN, Jasper County, NDB...

  10. 76 FR 55233 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-09-07

    ... (GPS) RWY 2, Amdt 2 Billings, MT, Billings Logan Intl, RNAV (GPS) RWY 25, Orig-B Bowman, ND, Bowman... Procedures (44 FR 11034; February 26, 1979); and (3) does not warrant preparation of a regulatory evaluation....-Blacker, Takeoff Minimums and Obstacle DP, Amdt 6 Miles City, MT, Frank Wiley Field, NDB RWY 4, Amdt...

  11. 76 FR 52239 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-08-22

    ... & Obstacle DP, Amdt 3 Storm Lake, IA, Storm Lake Muni, Takeoff Minimums & Obstacle DP, Orig Dwight, IL..., Orig Dallas, TX, Dallas Love Field, RNAV (GPS) RWY 31R, Amdt 1 Dallas, TX, Dallas Love Field, RNAV (GPS... (SA CAT II), Amdt 23B Moses Lake, WA, Grant Co Intl, ILS OR LOC RWY 32R, Amdt 20B Toledo, WA, Ed...

  12. Towards Ocean Grazer's Modular Power Take-Off System Modeling : A Port-Hamiltonian Approach

    NARCIS (Netherlands)

    Barradas Berglind, Jose de Jesus; Muñoz Arias, Mauricio; Wei, Yanji; Prins, Wouter; Vakis, Antonis I.; Jayawardhana, Bayu

    2017-01-01

    This paper presents a modular modeling framework for the Ocean Grazer’s Power Take-Off (PTO) system, which operates as an array of point-absorber type devices connected to a hydraulic system. The modeling is based on the port-Hamiltonian (PH) framework that enables energy-based analysis and control

  13. Stability analysis of the Gyroscopic Power Take-Off wave energy point absorber

    DEFF Research Database (Denmark)

    Nielsen, Søren R. K.; Zhang, Zili; Kramer, Morten Mejlhede

    2015-01-01

    The Gyroscopic Power Take-Off (GyroPTO) wave energy point absorber consists of a float rigidly connected to a lever. The operational principle is somewhat similar to that of the so-called gyroscopic hand wrist exercisers, where the rotation of the float is brought forward by the rotational partic...

  14. 75 FR 39152 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-07-08

    ... Jackson, AL, Jackson Muni, RNAV (GPS) RWY 1, Orig Jackson, AL, Jackson Muni, RNAV (GPS) RWY 19, Orig Troy, AL, Troy Muni, ILS OR LOC RWY 7, Amdt 9 Troy, AL, Troy Muni, RNAV (GPS) RWY 7, Amdt 1 Troy, AL, Troy... Minimums and Obstacle DP, Amdt 1 East Troy, WI, East Troy Muni, Takeoff Minimums and Obstacle DP,......

  15. Shh pathway in wounds in non-diabetic Shh-Cre-eGFP/Ptch1-LacZ mice treated with MAA beads.

    Science.gov (United States)

    Lisovsky, Alexandra; Sefton, Michael V

    2016-09-01

    Previously, poly(methacrylic acid-co-methyl methacrylate) (MAA) beads were shown to improve vessel formation with a concomitant increase in the expression of the sonic hedgehog (Shh) gene, a pleiotropic factor implicated in vascularization. The aim of this study was to follow up on this observation in the absence of the confounding factors of diabetes in non-diabetic Shh-Cre-eGFP/Ptch1-LacZ mice; in this mouse, expression of GFP and β-Gal is consistent with the transcription patterns of Shh and its receptor patched 1 (Ptch1), respectively. In agreement with studies in diabetic males, MAA beads improved vascularization in large (15 mm × 15 mm) wounds in non-diabetic males at day 7. Shh pathway activation was suggested, as the numbers of GFP+ (Shh) and β-Gal+ (Ptch1, a target of the pathway) cells increased in the granulation tissue. Shh signaling pathway modulation was also suggested in the healthy skin surrounding the wound bed, as evidenced by an increase in the number of GFP+ and β-Gal+ cells in males at day 4. Gene expression analysis of the wounds confirmed increase in Ptch1 and showed the upregulation of a downstream transcription factor Gli3, involved in the vascular effect of the Shh pathway, implicating the pathway in the effect of MAA beads. The efficacy of MAA beads was also investigated in females; MAA beads modulated the Shh pathway within granulation tissue similarly as in males, but had no enhancement effect on the healthy skin and on vascularization. We believe that understanding the molecular and cellular mechanisms of MAA-based biomaterials and testing the efficacy of therapeutics in both sexes will inform the development of novel therapeutic biomaterials.

  16. Functional evolution of jumping in frogs: Interspecific differences in take-off and landing.

    Science.gov (United States)

    Reilly, Stephen M; Montuelle, Stephane J; Schmidt, André; Krause, Cornelia; Naylor, Emily; Essner, Richard L

    2016-03-01

    Ancestral frogs underwent anatomical shifts including elongation of the hindlimbs and pelvis and reduction of the tail and vertebral column that heralded the transition to jumping as a primary mode of locomotion. Jumping has been hypothesized to have evolved in a step-wise fashion with basal frogs taking-off with synchronous hindlimb extension and crash-landing on their bodies, and then their limbs move forward. Subsequently, frogs began to recycle the forelimbs forward earlier in the jump to control landing. Frogs with forelimb landing radiated into many forms, locomotor modes, habitats, and niches with controlled landing thought to improve escape behavior. While the biology of take-off behavior has seen considerable study, interspecific comparisons of take-off and landing behavior are limited. In order to understand the evolution of jumping and controlled landing in frogs, data are needed on the movements of the limbs and body across an array of taxa. Here, we present the first description and comparison of kinematics of the hindlimbs, forelimbs and body during take-off and landing in relation to ground reaction forces in four frog species spanning the frog phylogeny. The goal of this study is to understand what interspecific differences reveal about the evolution of take-off and controlled landing in frogs. We provide the first comparative description of the entire process of jumping in frogs. Statistical comparisons identify both homologous behaviors and significant differences among species that are used to map patterns of trait evolution and generate hypotheses regarding the functional evolution of take-off and landing in frogs.

  17. Transition from leg to wing forces during take-off in birds.

    Science.gov (United States)

    Provini, Pauline; Tobalske, Bret W; Crandell, Kristen E; Abourachid, Anick

    2012-12-01

    Take-off mechanics are fundamental to the ecology and evolution of flying animals. Recent research has revealed that initial take-off velocity in birds is driven mostly by hindlimb forces. However, the contribution of the wings during the transition to air is unknown. To investigate this transition, we integrated measurements of both leg and wing forces during take-off and the first three wingbeats in zebra finch (Taeniopygia guttata, body mass 15 g, N=7) and diamond dove (Geopelia cuneata, body mass 50 g, N=3). We measured ground reaction forces produced by the hindlimbs using a perch mounted on a force plate, whole-body and wing kinematics using high-speed video, and aerodynamic forces using particle image velocimetry (PIV). Take-off performance was generally similar between species. When birds were perched, an acceleration peak produced by the legs contributed to 85±1% of the whole-body resultant acceleration in finch and 77±6% in dove. At lift-off, coincident with the start of the first downstroke, the percentage of hindlimb contribution to initial flight velocity was 93.6±0.6% in finch and 95.2±0.4% in dove. In finch, the first wingbeat produced 57.9±3.4% of the lift created during subsequent wingbeats compared with 62.5±2.2% in dove. Advance ratios were aerodynamics during wingbeats 2 and 3. These results underscore the relatively low contribution of the wings to initial take-off, and reveal a novel transitional role for the first wingbeat in terms of force production.

  18. The psychometric properties of the Mindful Attention Awareness Scale (MAAS and Freiburg Mindfulness Inventory (FMI as measures of mindfulness and their relationship with burnout and work engagement

    Directory of Open Access Journals (Sweden)

    Martina Kotzé

    2016-04-01

    Full Text Available Orientation: Given the increasing interest in mindfulness in the workplace, recent research recommends that the psychometric properties of existing mindfulness measures be evaluated in terms of convergent and predictive validity.Research purpose: The research purpose was to assess the psychometric properties of the 15-item (short version Mindful Attention Awareness Scale (MAAS and the 14-item (short version Freiburg Mindfulness Inventory (FMI in parallel on a South African sample. Furthermore, the research aimed to investigate the convergent validity between the FMI and MAAS as well as their relationship to burnout and work engagement (predictive validity.Motivation for the study: Organisational scholars must investigate the most appropriate instruments for measuring mindfulness in the workplace. Doing so would allow an eventual meta-analysis on the construct and its relationships and utility in the workplace.Research design, approach and methodology: For this study, a quantitative cross-sectional survey research design was employed. Convenience sampling was chosen and 497 participants applying for admission to a management and leadership degree programme at a South African Business School participated in the study. All participants of the sample are employed at either private or public institutions. Confirmatory factor analysis was used to determine the convergent validity of the instruments. Cronbach’s alpha was utilised in determining the reliabilities of the instruments. The product–moment correlation by Pearson was used to compare the two instruments in terms of their relationship to burnout and work engagement. Stepwise multiple regression was used to determine whether the FMI and MAAS are significant predictors of burnout and work engagement (predictive validity.Main findings: The results showed that the short versions of both the FMI and the MAAS are valid and reliable unidimensional measures of mindfulness. The findings showed that

  19. CLINICAL APPLICATION OF 99mTc MAA PULMONARY SCINTISCAN IN DEEP VEIN THROMBOSIS AND RHEUMATIC HEART DISEASE

    Institute of Scientific and Technical Information of China (English)

    陈万春; 曾昭瑞; 金立仁; 包玉倩

    1992-01-01

    We studied 21 cases of pulmonary thromboembolism (PTE) in 67 consecutive cases of deep vein thrombosis (DVT) of the lower limbs and 4 cases in 9 selective cases of rheumatic heart disease (RHD). The incidence of PTE in DVT could be inferred as being 31.3%. PTE were diagnosed by 99mTc MAA lung scintiscans. In the DVT cases, lung scintiscan were done right after venography of the legs. Six cases underwent pulmonary angiography, ⅠDSA. As PTE in the DVT cases were all subclinical, only oligemia andvascular "pruning" were noted. Injection of urokinase into the pulmonary artery concerned through a catheter after which intravenous infusion was continued for 10-14 days, only 3 PTE resolved, probably representing early cases.

  20. Study on Soap-free P(MMA-EA-AA/MAA) Latex Particles With Narrow Size Distribution

    Institute of Scientific and Technical Information of China (English)

    K. Kang; C. Y. Kan; Y. Du; D. S. Liu

    2005-01-01

    @@ 1Introduction In the past decades, more and more studies have been focused on the synthesis of monodisperse particles with different diameter by special polymerization technique. In 1980' s, Ugelstad, et al[1] invented two-step swelling method to prepare monodisperse microsphere with large size more than 1 μm. In the following decade, Okubo and his coworkers[2] synthesized monodisperse crosslinked polymer particles above 3 μm using one-step dynamic swelling method. New method has been developed to produce particles more than 50 μm in diameter with a standard deviation of less than 2%[3]. Up to now, most of the monodisperse particles were usually prepared by polymerization of St in the presence of surfactants. In this presentation, sub-micro sized P (MMA-EA-AA/MAA) particles with narrow size distribution were prepared by seeded emulsion polymerization in the absence of any surfactant materials.

  1. ANTIFOULING PROPERTIES OF POLY(VINYL CHLORIDE) MEMBRANES MODIFIED BY AMPHIPHILIC COPOLYMERS P(MMA-b-MAA)

    Institute of Scientific and Technical Information of China (English)

    Wei-dong Liu; Yong-hua Zhang; Li-feng Fang; Bao-ku Zhu; Li-ping Zhu

    2012-01-01

    Three well-defined diblock copolymers ofpoly(methyl methacrylate-b-methaerylic acid) (P(MMA-b-MAA)) were synthesized using atom transfer radical polymerization method and varying poly(methacrylic acid) (PMAA) chain lengths.These copolymers were blended with PVC to fabricate porous membranes via phase inversion process.Membrane morphologies were observed by scanning electron microscopy (SEM),and chemical composition changes of the membrane surfaces were measured by X-ray photoelectron spectroscopy (XPS).Static and dynamic protein adsorption experiments were used to evaluate antifouling properties of the blend membranes.It was found that,the blend membranes containing longer PMAA arm length showed lower static protein adsorption,higher water permeation flux and better protein solution flux recovery.

  2. The large carpenter bees of central Saudi Arabia, with notes on the biology of Xylocopa sulcatipes Maa (Hymenoptera, Apidae, Xylocopinae

    Directory of Open Access Journals (Sweden)

    Mohammed Hannan

    2012-06-01

    Full Text Available The large carpenter bees (Xylocopinae, Xylocopa Latreille occurring in central Saudi Arabia are reviewed. Two species are recognized in the fauna, Xylocopa (Koptortosoma aestuans (Linnaeus and X. (Ctenoxylocopa sulcatipes Maa. Diagnoses for and keys to the species of these prominent components of the central Saudi Arabian bee fauna are provided to aid their identification by pollination researchers active in the region. Females and males of both species are figured and biological notes provided for X. sulcatipes. Notes on the nesting biology and ecology of X. sulcatipes are appended. As in studies for this species from elsewhere, nests were found in dried stems of Calotropis procera (Aiton (Asclepiadaceae and Phoenix dactylifera L. (Arecaceae.

  3. Synthesis and characterization of MAA-based molecularly-imprinted polymer (MIP) with D-glucose template

    Science.gov (United States)

    Yanti; Nurhayati, T.; Royani, I.; Widayani; Khairurrijal

    2016-08-01

    In this study, molecularly-imprinted polymer (MIP) was prepared by using a D-glucose template and a methacrylic acid (MAA) functional monomer. The obtained MIP was characterized using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy techniques to study the template imprinting results. For comparison, similar characterizations were also carried out for the respective non imprinted polymer (NIP). It was found that the polymer has semicrystalline structure, with crystallinity degree of the unleached- polymer, the NIP, and the MIP is 62.40%, 62.97%, and 63.47%, respectively. XRD patterns showed that the intensity peaks increases as D-glucose content decreases. The FTIR spectra of the MIP indicate the detail interaction of template and functional monomer.

  4. Intern doctors’ views on the current and future antibiotic resistance situation of Chattagram Maa O Shishu Hospital Medical College, Bangladesh

    Directory of Open Access Journals (Sweden)

    Hoque R

    2015-08-01

    Full Text Available Rozina Hoque,1 Asma Mostafa,2 Mainul Haque3 1Department of Pharmacology, 2Department of Anatomy, Chattagram Maa O Shishu Hospital Medical College, Agrabad, Chittagong, Bangladesh; 3Unit of Pharmacology, Faculty of Medicine, Universiti Sultan Zainal Abidin, Terengganu, Malaysia Background: Bacterial resistance due to antibiotic misuse is reported every day. Such threat calls for a consensus to develop new strategies to prevent the development of antibiotic resistance of bacteria. Medical doctors must play a pivotal role to control and prevent the misuse of antibiotics. There were complaints that prescribers are lacking behind in updates and advancement in the field. To address such knowledge gap, a study was conducted to know the views of interns on the current antibiotic resistance situation in a teaching hospital in Bangladesh. Methods: This study was a cross-sectional, randomized, and questionnaire-based survey. Interns of the medicine, gynecology, and surgery departments of Chattagram Maa O Shishu Hospital Medical College were the study population. Results: Out of 50 respondents, 98% would like more education on antibiotic selection. All respondents believed that prescribing inappropriate or unnecessary antibiotics was professionally unethical. Ninety percent of the participants were confident in making an accurate diagnosis of infection. Eighty-four percent of them were confident about dosage schedule. In all, 98% participants thought that antibiotic resistance is a national problem and 64% of the respondents thought that same problem also existed in their hospital. Study participants were of the view that 41%–60% of antibiotic usages are irrational in Bangladesh. Fifty-eight percent of the study population thought that antimicrobial resistance (AR would be a greater problem in the future. Conclusion: The interns believe that there is a knowledge gap on AR. More emphasis should be given to AR and its implications in the undergraduate

  5. Does Step Length Adjustment Determine Take-Off Accuracy and Approach Run Velocity in Long and Triple Jumps?

    National Research Council Canada - National Science Library

    Makaruk Hubert; Marcin Starzak; Jerzy Sadowski

    2015-01-01

    Purpose. While take-off accuracy and approach run velocity are known determinants of long and triple jump performance, the interaction of these factors with step length adjustment (SLA) is not as clear. Methods...

  6. Stable Vertical Takeoff of an Insect-Mimicking Flapping-Wing System Without Guide Implementing Inherent Pitching Stability

    Institute of Scientific and Technical Information of China (English)

    Hoang Vu Phan; Quoc Viet Nguyen; Quang Tri Truong; Tien Van Truong; Hoon Cheol Park; Nam Seo Goo; Doyoung Byun; Min Jun Kim

    2012-01-01

    We briefly summarized how to design and fabricate an insect-mimicking flapping-wing system and demonstrate how to implement inherent pitching stability for stable vertical takeoff.The effect of relative locations of the Center of Gravity (CG) and the mean Aerodynamic Center (AC) on vertical flight was theoretically examined through static force balance consideration.We conducted a series of vertical takeoff tests in which the location of the mean AC was determined using an unsteady Blade Element Theory (BET) previously developed by the authors.Sequential images were captured during the takeoff tests using a high-speed camera.The results demonstrated that inherent pitching stability for vertical takeoff can be achieved by controlling the relative position between the CG and the mean AC of the flapping system.

  7. The relationship between the percentage of lung shunting on Tc-99m macroaggregated albumin (Tc-99m MAA scan and the grade of hepatocellular carcinoma vascularity

    Directory of Open Access Journals (Sweden)

    Rania Refaat

    2014-06-01

    Conclusion: Tc-99m MAA scan is fundamental prior to Y-90 microsphere SIRT as it minimizes the risk of post-radioembolization complications, hence, enhancing the safety of Y-90 microsphere subsequent administration. Moreover, the percentage of lung shunting varies considerably among patients with HCC relying on the grade of tumor vascularity.

  8. The Average IQ of Sub-Saharan Africans Assessed by the Progressive Matrices: A Reply to Wicherts, Dolan, Carlson & van der Maas

    Science.gov (United States)

    Lynn, Richard

    2010-01-01

    Wicherts, Dolan, Carlson & van der Maas (WDCM) (2010) contend that the average IQ in sub-Saharan Africa is about 76 in relation to a British mean of 100 and sd of 15. This result is achieved by including many studies of unrepresentative elite samples. Studies of acceptably representative samples indicate a sub-Saharan Africa IQ of…

  9. Microphysical Properties of Warm Clouds During The Aircraft Take-Off and Landing Over Bucharest, Romania

    Science.gov (United States)

    Stefan, Sabina; Nicolae Vajaiac, Sorin; Boscornea, Andreea

    2016-06-01

    This paper is focused on airborne measurements of microphysical parameters into warm clouds when the aircraft penetrates the cloud, both during take-off and landing. The experiment was conducted during the aircraft flight between Bucharest and Craiova, in the southern part of Romania. The duration of the experimental flight was 2 hours and 35 minutes in October 7th, 2014, but the present study is dealing solely with the analysis of cloud microphysical properties at the beginning of the experiment (during the aircraft take-off) and at the end, when it got finalized by the aircraft landing procedure. The processing and interpretation of the measurements showed the differences between microphysical parameters, emphasizing that the type of cloud over Bucharest changed, as it was expected. In addition, the results showed that it is important to take into account both the synoptic context and the cloud perturbation due to the velocity of the aircraft, in such cases.

  10. Flow-based method for epinephrine determination using a solid reactor based on molecularly imprinted poly(FePP-MAA-EGDMA)

    Energy Technology Data Exchange (ETDEWEB)

    Sartori, Lucas Rossi [Programa de Pos-Graduacao em Ciencias Farmaceuticas, Universidade Federal de Alfenas (Unifal-MG), Rua Gabriel Monteiro da Silva, 714, 37130-000, Alfenas/MG (Brazil); Santos, Wilney de Jesus Rodrigues [Departamento de Quimica Analitica, Instituto de Quimica, Universidade Estadual de Campinas (Unicamp), Cidade Universitaria Zeferino Vaz s/n,13083-970, Campinas/SP (Brazil); Kubota, Lauro Tatsuo [Departamento de Quimica Analitica, Instituto de Quimica, Universidade Estadual de Campinas (Unicamp), Cidade Universitaria Zeferino Vaz s/n,13083-970, Campinas/SP (Brazil); Instituto Nacional de Ciencia e Tecnologia (INCT) de Bioanalitica, Universidade Estadual de Campinas (Unicamp), Instituto de Quimica, Departamento de Quimica Analitica, Cidade Universitaria Zeferino Vaz s/n, 13083-970, Campinas/SP (Brazil); Segatelli, Mariana Gava [Departamento de Quimica, Universidade Estadual de Londrina (UEL), Rod. Celso Garcia PR 445 Km 380, 86051-990, Londrina/PR (Brazil); Tarley, Cesar Ricardo Teixeira, E-mail: tarley@uel.br [Programa de Pos-Graduacao em Ciencias Farmaceuticas, Universidade Federal de Alfenas (Unifal-MG), Rua Gabriel Monteiro da Silva, 714, 37130-000, Alfenas/MG (Brazil); Instituto Nacional de Ciencia e Tecnologia (INCT) de Bioanalitica, Universidade Estadual de Campinas (Unicamp), Instituto de Quimica, Departamento de Quimica Analitica, Cidade Universitaria Zeferino Vaz s/n, 13083-970, Campinas/SP (Brazil)

    2011-03-12

    A solid phase reactor based on molecularly imprinted poly(iron (III) protoporphyrin-methacrylic acid-ethylene glycol dimethacrylate) (MIP-MAA) has been synthesized by bulk method and applied as an selective material for the epinephrine determination in the presence of hydrogen peroxide. In order to prove the selective behaviour of MIP, two blank polymers named non-imprinted polymer (NIP1), non-imprinted polymer in the absence of hemin (NIP2) as well as a poly(iron (III) protoporphyrin-4-vynilpyridine-ethylene glycol dimethacrylate) (MIP-4VPy) were synthesized. The epinephrine-selective MIP-MAA reactor was used in a flow injection system, in which an epinephrine solution (120 {mu}L) at pH 8.0 percolates in the presence of hydrogen peroxide (300 {mu}mol L{sup -1}) through MIP-MAA. The oxidation of epinephrine by hydrogen peroxide is increased by using MIP-MAA, being the product formed monitored by amperometry at 0.0 V vs. Ag/AgCl. The MIP-MAA showed better selective behaviour than NIP1, NIP2 and MIP-4VPy, demonstrating the effectiveness of molecular imprinting effect. Highly improved response was observed for epinephrine in detriment of similar substances (phenol, ascorbic acid, methyl-L-DOPA, p-aminophenol, catechol, L-DOPA and guaiacol). The method provided a calibration curve ranging from 10 to 500 {mu}mol L{sup -1} and a limit of detection of 5.2 {mu}mol L{sup -1}. Kinetic data indicated a value of maximum rate V{sub max} (0.993 {mu}A) and apparent Michaelis-Menten constant of K{sub m}{sup app}(725.6 {mu}mol L{sup -1}). The feasibility of biomimetic solid reactor was attested by its successful application for epinephrine determination in pharmaceutical formulation.

  11. Methods for predicting unsteady takeoff and landing trajectories of the aircraft

    Science.gov (United States)

    Shevchenko, A.; Pavlov, B.; Nachinkina, G.

    2017-01-01

    Informational and situational awareness of the aircrew greatly affects the probability of accidents, during takeoff and landing in particular. For the purpose of assessing the current and predicting the future states of an aircraft the energy approach to the flight control is used. Key energy balance equation is generalized to the ground phases. The equation describes the process of accumulating of the total energy of the aircraft along the entire trajectory, including the segment ahead. This segment length is defined by the required terminal energy state. For the takeoff phase the predict algorithm calculates the aircraft position on a runway after which it is possible to accelerate up to the speed of steady level flight and to reach the altitude sufficient for overcoming the high-rise obstacles. For the landing phase the braking distance length is determined. For increasing the likelihood of predicting the correction of the algorithm is introduced. The results of modeling many takeoffs and landings of passenger liner with different weights with the ahead obstacle and the engine failure are given. Working availability of the algorithm correction is shown.

  12. Optimum take-off techniques and muscle design for long jump.

    Science.gov (United States)

    Seyfarth, A; Blickhan, R; Van Leeuwen, J L

    2000-02-01

    A two-segment model based on Alexander (1990; Phil. Trans. R. Soc. Lond. B 329, 3-10) was used to investigate the action of knee extensor muscles during long jumps. A more realistic representation of the muscle and tendon properties than implemented previously was necessary to demonstrate the advantages of eccentric force enhancement and non-linear tendon properties. During the take-off phase of the long jump, highly stretched leg extensor muscles are able to generate the required vertical momentum. Thereby, serially arranged elastic structures may increase the duration of muscle lengthening and dissipative operation, resulting in an enhanced force generation of the muscle-tendon complex. To obtain maximum performance, athletes run at maximum speed and have a net loss in mechanical energy during the take-off phase. The positive work done by the concentrically operating muscle is clearly less than the work done by the surrounding system on the muscle during the eccentric phase. Jumping performance was insensitive to changes in tendon compliance and muscle speed, but was greatly influenced by muscle strength and eccentric force enhancement. In agreement with a variety of experimental jumping performances, the optimal jumping technique (angle of attack) was insensitive to the approach speed and to muscle properties (muscle mass, the ratio of muscle fibre to tendon cross-sectional area, relative length of fibres and tendon). The muscle properties also restrict the predicted range of the angle of the velocity vector at take-off.

  13. Is prophylactic embolization of the hepatic falciform artery needed before radioembolization in patients with {sup 99m}Tc-MAA accumulation in the anterior abdominal wall?

    Energy Technology Data Exchange (ETDEWEB)

    Ahmadzadehfar, Hojjat; Sabet, Amir; Muckle, Marianne; Haslerud, Torjan; Biersack, Hans Juergen; Ezziddin, Samer [University Hospital Bonn, Department of Nuclear Medicine, Bonn (Germany); Moehlenbruch, Markus; Meyer, Carsten; Wilhelm, Kai; Schild, Hans Heinz [University Hospital Bonn, Department of Radiology, Bonn (Germany)

    2011-08-15

    While influx of chemoembolic agents into the hepatic falciform artery (HFA) from the hepatic artery can cause supraumbilical skin rash, epigastric pain and even skin necrosis, the significance of a patent HFA in patients undergoing radioembolization is not completely clear. Furthermore, the presence of tracer in the anterior abdominal wall seen in {sup 99m}Tc-macroaggregated albumin ({sup 99m}Tc-MAA) images, which is generally performed prior to radioembolization, has been described as a sign of a patent HFA. The aim of this retrospective study was to evaluate the incidence and consequences of {sup 99m}Tc-MAA accumulation in the anterior abdominal wall, indicating a patent HFA, in patients undergoing radioembolization of liver tumours. A total of 224 diagnostic hepatic angiograms combined with {sup 99m}Tc-MAA SPECT/CT were acquired in 192 patients with different types of cancer, of whom 142 were treated with a total of 214 radioembolization procedures. All patients received a whole-body scan, and planar and SPECT/CT scans of the abdomen. Only patients with extrahepatic {sup 99m}Tc-MAA accumulation in the anterior abdominal wall were included in this study. Posttreatment bremsstrahlung SPECT/CT and follow-up results for at least 3 months served as reference standards. Tracer accumulation in the anterior abdominal wall was present in pretreatment {sup 99m}Tc-MAA SPECT/CT images of 18 patients (9.3%). The HFA was found and embolized by radiologists before treatment in one patient. In the remaining patients radioembolization was performed without any modification in the treatment plan despite the previously mentioned extrahepatic accumulation. Only one patient experienced abdominal muscle pain above the navel, which started 24 h after treatment and lasted for 48 h without any skin changes. The remaining patients did not experience any relevant side effects during the follow-up period. Side effects after radioembolization in patients with tracer accumulation in the

  14. {sup 99m}Tc-MAA overestimates the absorbed dose to the lungs in radioembolization: a quantitative evaluation in patients treated with {sup 166}Ho-microspheres

    Energy Technology Data Exchange (ETDEWEB)

    Elschot, Mattijs; Nijsen, Johannes F.W.; Lam, Marnix G.E.H.; Smits, Maarten L.J.; Prince, Jip F.; Bosch, Maurice A.A.J. van den; Zonnenberg, Bernard A.; Jong, Hugo W.A.M. de [University Medical Center Utrecht, Department of Radiology and Nuclear Medicine, Utrecht (Netherlands); Viergever, Max A. [University Medical Center Utrecht, Department of Radiology and Nuclear Medicine, Utrecht (Netherlands); University Medical Center Utrecht, Image Sciences Institute, Utrecht (Netherlands)

    2014-10-15

    Radiation pneumonitis is a rare but serious complication of radioembolic therapy of liver tumours. Estimation of the mean absorbed dose to the lungs based on pretreatment diagnostic {sup 99m}Tc-macroaggregated albumin ({sup 99m}Tc-MAA) imaging should prevent this, with administered activities adjusted accordingly. The accuracy of {sup 99m}Tc-MAA-based lung absorbed dose estimates was evaluated and compared to absorbed dose estimates based on pretreatment diagnostic {sup 166}Ho-microsphere imaging and to the actual lung absorbed doses after {sup 166}Ho radioembolization. This prospective clinical study included 14 patients with chemorefractory, unresectable liver metastases treated with {sup 166}Ho radioembolization. {sup 99m}Tc-MAA-based and {sup 166}Ho-microsphere-based estimation of lung absorbed doses was performed on pretreatment diagnostic planar scintigraphic and SPECT/CT images. The clinical analysis was preceded by an anthropomorphic torso phantom study with simulated lung shunt fractions of 0 to 30 % to determine the accuracy of the image-based lung absorbed dose estimates after {sup 166}Ho radioembolization. In the phantom study, {sup 166}Ho SPECT/CT-based lung absorbed dose estimates were more accurate (absolute error range 0.1 to -4.4 Gy) than {sup 166}Ho planar scintigraphy-based lung absorbed dose estimates (absolute error range 9.5 to 12.1 Gy). Clinically, the actual median lung absorbed dose was 0.02 Gy (range 0.0 to 0.7 Gy) based on posttreatment {sup 166}Ho-microsphere SPECT/CT imaging. Lung absorbed doses estimated on the basis of pretreatment diagnostic {sup 166}Ho-microsphere SPECT/CT imaging (median 0.02 Gy, range 0.0 to 0.4 Gy) were significantly better predictors of the actual lung absorbed doses than doses estimated on the basis of {sup 166}Ho-microsphere planar scintigraphy (median 10.4 Gy, range 4.0 to 17.3 Gy; p < 0.001), {sup 99m}Tc-MAA SPECT/CT imaging (median 2.5 Gy, range 1.2 to 12.3 Gy; p < 0.001), and {sup 99m}Tc-MAA planar

  15. CALCULATION OF OPERATING PARAMETERS OF HIGH-VOLTAGE POWER TAKE-OFF SYSTEM FOR THE PHOTOVOLTAIC FACILITY

    Directory of Open Access Journals (Sweden)

    R.V. Zaitsev

    2016-09-01

    Full Text Available Purpose. To ensure maximum production of electric power by photovoltaic vacilities, in addition to using highly efficient photovoltaic modules equipped with solar radiation concentrators must use a highly effective power take-off system. This paper is inscribed to solving the problem of a highly efficient and economic power take-off system development. Methodology. To solving the problem, we implemented three stages. On the first stage examines the dependence of electrical power from the intensity of the incident solar radiation. Based on this, the second stage is calculated the DC-DC converter resonant circuit and its working parameters, and developed circuit diagram of DC-DC converter. On the third stage, we carry out an analysis of power take-off system with step up DC-DC converter working. Results. In this paper, we carry out the analysis of working efficiency for photovoltaic facility power take-off system with step-up boost converter. The result of such analysis show that the efficiency of such system in a wide range of photovoltaic energy module illumination power is at 0.92, whereas the efficiency of classic power take-off systems does not exceed 0.70. Achieved results allow designing a circuit scheme of a controlled bridge resonant step-up converter with digital control. Proposed scheme will ensure reliable operation, fast and accurate location point of maximum power and conversion efficiency up to 0.96. Originality. Novelty of proposed power take-off system solution constitute in implementation of circuit with DC-DC converters, which as it shown by results of carrying out modeling is the most effective. Practical value. Practical implementation of proposed power take-off system design will allow reducing losses in connective wires and increasing the efficiency of such a system up to 92.5% in wide range of photovoltaic energy modules illumination.

  16. Distribution of lung blood on modified bilateral Glenn shunt evaluated by Tc-99m-MAA lung perfusion scintigraphy

    Science.gov (United States)

    Si, Biao; Luan, Zhao-sheng; Wang, Tong-jian; Ning, Yan-song; Li, Na; Zhu, Meng; Liu, Zhong-min; Ding, Guang-hong; Qiao, Bin

    2016-01-01

    Abstract The aim of the present study was to determine the distribution of lung blood in a modified bilateral Glenn procedure designed in our institute with lung perfusion scintigraphy. Sixteen consecutive patients who underwent modified bilateral Glenn operation from 2011 to 2014 were enrolled in the study. The control group consisted of 7 patients who underwent bidirectional Glenn shunt. Radionuclide lung perfusion scintigraphy was performed using Tc-99m-macro aggregated albumin (MAA) in all patients. For the patients in modified bilateral Glenn group, the time at which the radioactivity accumulation peaked did not differ significantly between the right and left lung field (t = 0.608, P = 0.554). The incidence of perfusion abnormality in each lung lobe also did not differ significantly (P = 0.426 by Fisher exact test). The radioactive counts were higher in the right lung than in the left lung, but the difference was not statistically significant (t = 1.502, P = 0.157). Radioactive perfusion in the lower lung field was significantly greater than that in the upper field (t = 4.368, P lung to that in left lung was significantly lower in the modified bilateral Glenn group (t = 3.686, P = 0.002). Lung perfusion scintigraphy confirmed the benefit of the modified bilateral Glenn shunt with regard to more balanced blood perfusion in both lungs. PMID:27661042

  17. Analysis of the dynamic states of pulmonary ventilation and perfusion in bronchial asthmatics using (133)Xe gas ventilation scintigraphy and (99m)Tc-MAA lung perfusion scintigraphy

    OpenAIRE

    石濱,英暢

    1994-01-01

    To clarify the organic changes and pathophysiology of the lungs in intractable asthmatics, the dynamic states of pulmonary ventilation and perfusion were analyzed in 15 bronchial asthmatic in the stable state using (133)Xe gas ventilation scintigraphy and (99m)Tc-MAA lung perfusion scintigraphy, respectively. Dysfunction of pulmonary ventilation and impairment of pulmonary perfusin were significantly severer in intractable asthmatics than in non-intractable asthmatics (p

  18. Evaluation of residual functional lung volume on Tc-99m DTPA aerosol ventilation and Tc-99m MAA perfusion scintigraphy in primary ciliary dyskinesia (Kartagener syndrome).

    Science.gov (United States)

    Chen, Yu-Wen; Chang, Chin-Chuan; Lai, Yung-Chuang; Lu, Chia-Ying; Dai, Zen-Kong

    2008-12-01

    Kartagener syndrome is diagnosed as sinusitis, bronchitis (bronchiectasis), and situs inversus by the clinical features. It is a subclass of primary ciliary dyskinesia (PCD) disease. A 12-year-old girl who had frequent upper and lower airway infections since birth, which was confirmed as Kartagener syndrome by HRCT imaging. We present the residual functional lung volume and mucociliary clearance findings seen on Tc-99m DTPA aerosol ventilation and Tc-99m MAA perfusion scintigraphy.

  19. Study of Mechanical Properties of P(AAm-co-MAA) Novel Hybrid Hydrogels in the Presence of PANI and MWNTs-COOH at Different pH Environment%P(AAm-co-MAA)/PANI/MWNTs-COOH新型杂合水凝胶在不同pH环境下力学性能的研究

    Institute of Scientific and Technical Information of China (English)

    刘展晴

    2012-01-01

    The morphological characterization and mechanical properties of the gels were investigated by an environmental scanning electron microscopy and a dynamical viscoelasticity analyzer, respectively. The experimental results indicated that after incorporating the polyelectrolyte PANI and MWNTs-COOH into poly(acrylamide-co-methac-rylate) (P(AAm-co-MAA)), the P(AAm-co-MAA)/PANI/MWNTs-COOH hybrid hydrogels show an even better mechanical properties and a stronger pH-sensitivity than the genuine hydrogels.as may primarily be attributed to the presence of PANL The novel hybrid hydrogels are expected to find applications in tissue engineering.%利用环境扫描电镜、动态粘弹谱仪分析了所制备新型水凝胶的结构和力学性能.结果表明,将聚苯胺(PANI)和羧基碳纳米管(MWNTs-COOH)引入到聚(丙烯酰胺-co-甲基丙烯酸)(P( AAm-co-MAA))网络中,制备的P(AAm-co-MAA)/PANI/MWNTs-COOH新型杂合水凝胶表现出比纯水凝胶更好的力学性能和更强的pH敏感性.这些优越的性能主要归因于PANI的存在.这种新型杂合水凝胶有望应用于组织工程.

  20. Influence of time delay on the estimated lung shunt fraction on 99mTc-labeled MAA scintigraphy for 90Y microsphere treatment planning.

    Science.gov (United States)

    De Gersem, Ruth; Maleux, Geert; Vanbilloen, Hubert; Baete, Kristof; Verslype, Chris; Haustermans, Karin; Verbruggen, Alfons; Van Cutsem, Eric; Deroose, Christophe Michel

    2013-12-01

    90Y-microspheres therapy is used to treat selected patients with primary or metastatic liver tumors in a safe and effective way. As a preparation for 90Y-microspheres treatment, a 99mTc-macroaggregated albumin (99mTc-MAA) simulation procedure is essential to evaluate particle shunting to the lung or gastrointestinal tract. We investigated the effect of interval between injection of 99mTc-MAA and time of scanning on the lung shunt fraction (LSF). In 4 patients with secondary hepatic malignancies who underwent repeated whole-body scintigraphy up to 5 hours after injection of 99mTc-MAA, a marked change in LSF was observed. It appears that tracer degradation leads to an important overestimation of LSF at later time points. An overestimation of LSF can lead to dose reduction or canceling of the planned 90Y-microspheres treatment. It is concluded that the interval between injection and scanning should be kept as short as possible.

  1. Analysis of Mycosporine-Like Amino Acids in Selected Algae and Cyanobacteria by Hydrophilic Interaction Liquid Chromatography and a Novel MAA from the Red Alga Catenella repens

    Directory of Open Access Journals (Sweden)

    Anja Hartmann

    2015-10-01

    Full Text Available Mycosporine-like amino acids (MAAs, a group of small secondary metabolites found in algae, cyanobacteria, lichens and fungi, have become ecologically and pharmacologically relevant because of their pronounced UV-absorbing and photo-protective potential. Their analytical characterization is generally achieved by reversed phase HPLC and the compounds are often quantified based on molar extinction coefficients. As an alternative approach, in our study a fully validated hydrophilic interaction liquid chromatography (HILIC method is presented. It enables the precise quantification of several analytes with adequate retention times in a single run, and can be coupled directly to MS. Excellent linear correlation coefficients (R2 > 0.9991 were obtained, with limit of detection (LOD values ranging from 0.16 to 0.43 µg/mL. Furthermore, the assay was found to be accurate (recovery rates from 89.8% to 104.1% and precise (intra-day precision: 5.6%, inter-day precision ≤6.6%. Several algae were assayed for their content of known MAAs like porphyra-334, shinorine, and palythine. Liquid chromatography-mass spectrometry (LC-MS data indicated a novel compound in some of them, which could be isolated from the marine species Catenella repens and structurally elucidated by nuclear magnetic resonance spectroscopy (NMR as (E-3-hydroxy-2-((5-hydroxy-5-(hydroxymethyl-2-methoxy-3-((2-sulfoethylaminocyclohex-2-en-1-ylideneamino propanoic acid, a novel MAA called catenelline.

  2. Utility of Quantitative 99mTc-MAA SPECT/CT for 90yttrium-Labelled Microsphere Treatment Planning: Calculating Vascularized Hepatic Volume and Dosimetric Approach

    Directory of Open Access Journals (Sweden)

    Etienne Garin

    2011-01-01

    Full Text Available Objectives. The aim of this study was to assess the effectiveness of SPECT/CT for volume measurements and to report a case illustrating the major impact of SPECT/CT in calculating the vascularized liver volume and dosimetry prior to injecting radiolabelled yttrium-90 microspheres (Therasphere. Materials and Methods. This was a phantom study, involving volume measurements carried out by two operators using SPECT and SPECT/CT images. The percentage of error for each method was calculated, and interobserver reproducibility was evaluated. A treatment using Therasphere was planned in a patient with three hepatic arteries, and the quantitative analysis of SPECT/CT for this patient is provided. Results. SPECT/CT volume measurements proved to be accurate (mean error <6% for volumes ≥16 cm3 and reproductive (interobserver agreement = 0.9. In the case report, 99mTc-MAA SPECT/CT identified a large liver volume, not previously identified with angiography, which was shown to be vascularized after selective MAA injection into an arterial branch, resulting in a large modification in the activity of Therasphere used. Conclusions. MAA SPECT/CT is accurate for vascularized liver volume measurements, providing a valuable contribution to the therapeutic planning of patients with complex hepatic vascularization.

  3. [Kari Tarkiainen, Ülle Tarkiainen. Provinsen bortom havet : Estlands svenska historia 1561-1710; Kari Tarkiainen, Ülle Tarkiainen. Meretagune maa : Rootsi aeg Eestis 1561-1710] / Pärtel Piirimäe

    Index Scriptorium Estoniae

    Piirimäe, Pärtel, 1972-

    2015-01-01

    Arvustus: Tarkiainen Kari, Tarkiainen Ülle. Provinsen bortom havet : Estlands svenska historia 1561-1710 Verlag Atlantis. Stockholm 2013; Tarkiainen, Kari, Tarkiainen, Ülle. Meretagune maa : Rootsi aeg Eestis 1561-1710. verlag Varrak Tallinn 2014

  4. [Kari Tarkiainen, Ülle Tarkiainen. Provinsen bortom havet : Estlands svenska historia 1561-1710; Kari Tarkiainen, Ülle Tarkiainen. Meretagune maa : Rootsi aeg Eestis 1561-1710] / Pärtel Piirimäe

    Index Scriptorium Estoniae

    Piirimäe, Pärtel, 1972-

    2015-01-01

    Arvustus: Tarkiainen Kari, Tarkiainen Ülle. Provinsen bortom havet : Estlands svenska historia 1561-1710 Verlag Atlantis. Stockholm 2013; Tarkiainen, Kari, Tarkiainen, Ülle. Meretagune maa : Rootsi aeg Eestis 1561-1710. verlag Varrak Tallinn 2014

  5. New stabilization design for planar vertical take-off and landing aircrafts

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    This paper presents a new stabilizing control law for a planar vertical take-off and landing aircraft.The model is first transformed into an equivalent form,and then a control law consisting of a linear term and a saturated term is given for a related subsystem,with the saturation levels being assigned as large as possible.Compared to the existing saturation scheme in which all states are restricted by saturations,the design brings about a relatively fast convergence.The effectiveness and advantage of the d...

  6. Unsteady Flow and Force Control in Butterfly Take-off Flight

    CERN Document Server

    Dong, Haibo; Liang, Zongxian; Yun, Xiang

    2012-01-01

    In this work, high-resolution, high-speed videos of a Monarch butterfly (Danaus plexippus) in take-off flight were obtained using a photogrammetry system. Using a 3D subdivision surface reconstruction methodology, the butterfly's body/wing deformation and kinematics were modeled and reconstructed from those videos. High fidelity simulations were then carried out in order to understand vortex formation in both near-field and far-field of butterfly wings and examine the associated aerodynamic performance. A Cartesian grid based sharp interface immersed boundary solver was used to handle such flows in all their complexity.

  7. ICT diffusion in developing countries towards a new concept of technological takeoff

    CERN Document Server

    Lechman, Ewa

    2015-01-01

    This book provides an extensive overview of the diffusion of Information and Communication Technologies (ICTs) in developing countries between 2000 and 2012. It covers issues such as country-specific ICT diffusion patterns, technological substitution and technological convergence. By identifying social, economic and institutional prerequisites and analyzing critical country-specific conditions, the author develops a new approach to explaining the emergence of their technological takeoff. Readers will discover how developing countries are now adopting ICTs, rapidly catching up with the developed world in terms of ICT access and use.

  8. Effects of visual and motion simulation cueing systems on pilot performance during takeoffs with engine failures

    Science.gov (United States)

    Parris, B. L.; Cook, A. M.

    1978-01-01

    Data are presented that show the effects of visual and motion during cueing on pilot performance during takeoffs with engine failures. Four groups of USAF pilots flew a simulated KC-135 using four different cueing systems. The most basic of these systems was of the instrument-only type. Visual scene simulation and/or motion simulation was added to produce the other systems. Learning curves, mean performance, and subjective data are examined. The results show that the addition of visual cueing results in significant improvement in pilot performance, but the combined use of visual and motion cueing results in far better performance.

  9. Discrete Displacement Hydraulic Power Take-Off System for the Wavestar Wave Energy Converter

    DEFF Research Database (Denmark)

    Hansen, Rico Hjerm; Kramer, Morten; Vidal, Enrique

    2013-01-01

    The Wavestar Wave Energy Converter (WEC) is a multiple absorber concept, consisting of 20 hemisphere shaped floats attached to a single platform. The heart of the Wavestar WEC is the Power Take-Off (PTO) system, converting the wave induced motion of the floats into a steady power output to the grid....... In the present work, a PTO based on a novel discrete displacement fluid power technology is explored for the Wavestar WEC. Absorption of power from the floats is performed by hydraulic cylinders, supplying power to a common fixed pressure system with accumulators for energy smoothing. The stored pressure energy...

  10. Research on In-situ Cyclization Reaction in the Preparation of MAA/AN Copolymer Foam%甲基丙烯酸/丙烯腈(MAA/AN)共聚物泡沫制备过程中的"原位成环"反应研究

    Institute of Scientific and Technical Information of China (English)

    刘铁民; 张广成; 梁国正; 陈挺; 史学涛; 张翠

    2006-01-01

    以甲基丙烯酸(MAA)和丙烯腈(AN)为原料,通过自由基本体聚合制备了一种硬质MAA/AN共聚物泡沫.探讨了相应共聚物在发泡和热处理过程中发生的"原位成环"反应及机理,并利用差示扫描量热分析(DSC)和红外光谱(FTIR)进行了验证.结果表明:MAA/AN共聚物的DSC曲线在179.57℃有酸酐化放热反应峰.发泡和热处理以后,MAA/AN共聚物FTIR谱图中的羧羟基-OH弯曲振动峰减弱,而酸酐C-O-C伸缩振动峰加强,且出现了酸酐(>)C(=)O的伸缩振动峰;生成了较为强烈的(>)C(-)N弯曲振动峰;(-)C(≡)N伸缩振动吸收峰略微减弱,并出现了新的-C(=)N-吸收谱带.说明分子链上发生了"原位成环"反应,形成的刚性酸酐环、六元酰亚胺环以及梯形结构使MAA/AN共聚物泡沫具有高闭孔率和优异的力学、耐热性能.

  11. Magnetic levitation assisted aircraft take-off and landing (feasibility study - GABRIEL concept)

    Science.gov (United States)

    Rohacs, Daniel; Rohacs, Jozsef

    2016-08-01

    The Technology Roadmap 2013 developed by the International Air Transport Association envisions the option of flying without an undercarriage to be in operation by 2032. Preliminary investigations clearly indicate that magnetic levitation technology (MagLev) might be an appealing solution to assist the aircraft take-off and landing. The EU supported research project, abbreviated as GABRIEL, was dealing with (i) the concept development, (ii) the identification, evaluation and selection of the deployable magnetic levitation technology, (iii) the definition of the core system elements (including the required aircraft modifications, the ground-based system and airport elements, and the rendezvous control system), (iv) the analysis of the safety and security aspects, (v) the concept validation and (vi) the estimation of the proposed concept impact in terms of aircraft weight, noise, emission, cost-benefit). All results introduced here are compared to a medium size hypothetic passenger aircraft (identical with an Airbus A320). This paper gives a systematic overview of (i) the applied methods, (ii) the investigation of the possible use of magnetic levitation technology to assist the commercial aircraft take-off and landing processes and (iii) the demonstrations, validations showing the feasibility of the radically new concept. All major results are outlined.

  12. Linear kinematics at take-off in horses jumping the wall in an international Puissance competition.

    Science.gov (United States)

    Powers, Pippa

    2005-07-01

    Sagittal plane SVHS video recordings (50 Hz) were made of horses jumping the wall at an international Puissance competition. Video sequences were manually digitized and six kinematic variables at take-off were analyzed. Nine horses started the competition with the fence height at 1.80 m, and two horses attempted the fence in the fifth and final round with the fence height at 2.27 m. For successful performances, fence height was correlated with the following take-off variables: vertical velocity of the centre of mass (r = 0.45, p = 0.03); height of centre of mass (r = 0.44, p = 0.04); distance of centre of mass from fence (r = 0.46, p = 0.03); and distance from leading hind limb to centre of mass (r = -0.61, p horses jumping over a Puissance wall. The results should help horse riders and trainers improve performance in Puissance jumping horses, and perhaps help in the early selection of horses with a talent for jumping high fences.

  13. Rheological Properties and Gelation of pH-Responsive P(HEMA/MAA) Nano-Microgel Dispersions%pH响应型P(HEMA/MAA)纳米微凝胶分散液的凝胶化行为和流变性能

    Institute of Scientific and Technical Information of China (English)

    申迎华; 刘慧敏; 李国卿; 翟志国; 树学峰; 台秀梅

    2011-01-01

    Poly((2-hydroxyethyl methacrylate)-co-(methacrylic acid)) (P(HEMA/MAA)) microgels with potential application in the restoration of damaged tissue were prepared. The phase transition behavior of P(HEMA/MAA) microgel dispersions at different pH values and concentrations as well as rheological properties of diluent and concentrated dispersions were investigated by tube inversion measurements and rheometry, respectively. The mechanism of the pH-induced physical gel phase transition was discussed. The results indicate that P(HEMA/MAA) microgel dispersions at a given concentration can be transformed into a macroscopic gel for gelation at a physiological pH. The mechanical strength of the P(HEMA-co-MAA) macroscopic gel (nHEMA/nMAA=8/2, pH=7.0) is the best and the elastic modulus (G') value can reach 7.58 ×103 Pa. The swelling effects of the P(HEMA/MAA) microgel are different under different conditions, which results in a variety of apparent viscosities for the diluent dispersions. We deduce that the swelling behavior of the microgel particles can be divided into three stages from the outer parts of the particles to the inner parts. The gelation transitions of the concentrated dispersions are caused synergistically by space electrostatic interactions and hydrogen bonds of the neighboring microgel particles or between microgel particles and water molecules.%制备了在修复受损组织方面有应用潜能的纳米级聚(甲基丙烯酸羟乙酯/甲基丙烯酸)(P(HEMA/MAA))微凝胶:采用试管倒转法对不同pH值和浓度的P(HEMA/MAA)微凝胶分散液的凝胶化相转变行为进行了研究:借助椎板流变仪考察了低浓度和高浓度微凝胶分散液的流变性能,并对pH触发物理凝胶化相转变机理进行了推测.结果表明:在生理pH值环境下,一定浓度的P(HEMNMAA)微凝胶分散液可以发生凝胶化相转变形成凝胶态,pH=7时,HEMA/MAA进料摩尔比为8/2的微凝胶分散液凝胶化后得到的凝胶力学性能最

  14. The Investigation of Take-off and Landing Characteristics of Jet Shortened Take-off and Landing Aircraft (STOL) (K Voprosu Issledovaniya Vzletno-Posadochnykh Kharakteristik Reaktivnykh Samoletov Ukorochennogo Vzleta i Posadki (SUVP)),

    Science.gov (United States)

    1977-07-25

    including an analysis made from the viewpoint of take-off and landing and flight characteristics , as well as safety and economy is vital for this purpose...No. 16, l96~ . 8. A Manual on VTOL Aircraft. Trudy TsAGI , 1965. 9. W. Seibold. Untersuchungen uber die von Hubstrahlen an Senkrechstartern Erzeugen

  15. Development of SCR Aircraft takeoff and landing procedures for community noise abatement and their impact on flight safety

    Science.gov (United States)

    Grantham, W. D.; Smith, P. M.

    1980-01-01

    Piloted simulator studies to determine takeoff and landing procedures for a supersonic cruise transport concept that result in predicted community noise levels which meet current Federal Aviation Administration (FAA) standards are discussed. The results indicate that with the use of advanced procedures, the subject simulated aircraft meets the FAA traded noise levels during takeoff and landing utilizing average flight crew skills. The advanced takeoff procedures developed involved violating three of the current Federal Aviation Regulations (FAR) noise test conditions. These were: (1) thrust cutbacks at altitudes below 214 meters (700 ft); (2) thrust cutback level below those presently allowed; and (3) configuration change, other than raising the landing gear. It was not necessary to violate any FAR noise test conditions during landing approach. It was determined that the advanced procedures developed do not compromise flight safety. Automation of some of the aircraft functions reduced pilot workload, and the development of a simple head-up display to assist in the takeoff flight mode proved to be adequate.

  16. Jõekalda "Maa saadikute" projektis

    Index Scriptorium Estoniae

    2000-01-01

    Edela-Prantsusmaal Poitiers' lähedal 4. II 2000-10. II 2001 avatud näitus esitab kõigi maailmajagude kunstnike käsitluse lõppevast millenniumist. Eestit esindab Loit Jõekalda frotaazhtehnikas töö "Tee I-II". Kuraator Monique Stupar, stsenografist Isabelle Barbazanges.

  17. "Tõotatud maa" / Ilmar Mikiver

    Index Scriptorium Estoniae

    Mikiver, Ilmar, 1920-2010

    2008-01-01

    autori mälestusi 1942. a. praktikandina Tartu Kirjandusmuuseumis töötamise ajast, eestlaste väljarändest Abhaasiasse ja Krimmi, Sinimetsa (Simititsa) asunduse tekkeloost. Washington Times'i korrespondendi Svetlana Korenovska ülevaade olukorrast Abhaasias

  18. Clinical impact of {sup 99m}Tc-MAA SPECT/CT-based dosimetry in the radioembolization of liver malignancies with {sup 90}Y-loaded microspheres

    Energy Technology Data Exchange (ETDEWEB)

    Garin, Etienne [Cancer Institute Eugene Marquis, Department of Nuclear Medicine, Rennes (France); University of Rennes 1, Rennes (France); INSERM, U-991, Liver Metabolisms and Cancer, Rennes (France); Rolland, Yan [Cancer Institute Eugene Marquis, Department of Medical Imaging, Rennes (France); Laffont, Sophie [University of Rennes 1, Rennes (France); Edeline, Julien [University of Rennes 1, Rennes (France); INSERM, U-991, Liver Metabolisms and Cancer, Rennes (France); Cancer Institute Eugene Marquis, Department of Medical Oncology, Rennes (France)

    2016-03-15

    Radioembolization with {sup 90}Y-loaded microspheres is increasingly used in the treatment of primary and secondary liver cancer. Technetium-99 m macroaggregated albumin (MAA) scintigraphy is used as a surrogate of microsphere distribution to assess lung or digestive shunting prior to therapy, based on tumoral targeting and dosimetry. To date, this has been the sole pre-therapeutic tool available for such evaluation. Several dosimetric approaches have been described using both glass and resin microspheres in hepatocellular carcinoma (HCC) and liver metastasis. Given that each product offers different specific activities and numbers of spheres injected, their radiobiological properties are believed to lightly differ. This paper summarizes and discusses the available studies focused on MAA-based dosimetry, particularly concentrating on potential confounding factors like clinical context, tumor size, cirrhosis, previous or concomitant therapy, and product used. In terms of the impact of tumoral dose in HCC, the results were concordant and a response relationship and tumoral threshold dose was clearly identified, especially in studies using glass microspheres. Tumoral dose has also been found to influence survival. The concept of treatment intensification has recently been introduced, yet despite several studies publishing interesting findings on the tumor dose-metastasis relationship, no consensus has been reached, and further clarification is thus required. Nor has the maximal tolerated dose to the liver been well documented, requiring more accurate evaluation. Lung dose was well described, despite recently identified factors influencing its evaluation, requiring further assessment. MAA SPECT/CT dosimetry is accurate in HCC and can now be used in order to achieve a fully customized approach, including treatment intensification. Yet further studies are warranted for the metastasis setting and evaluating the maximal tolerated liver dose. (orig.)

  19. Evaluation of the absorbed dose to the lungs due to Xe{sup 133} and Tc{sup 99m} (MAA); Evaluacion de la dosis absorbida en los pulmones debido al Xe{sup 133} y Tc{sup 99m} (MAA)

    Energy Technology Data Exchange (ETDEWEB)

    Vazquez A, M.; Murillo C, F.; Castillo D, C.; Sifuentes D, Y.; Sanchez S, P. [Universidad Nacional de Trujillo, Av. Juan Pablo II s/n, Trujillo (Peru); Rojas P, E. [Instituto Peruano de Energia Nuclear, Av. Canada 1470, Lima (Peru); Marquez P, F., E-mail: marvva@hotmail.com [Instituto Nacional de Enfermedades Neoplasicas, Av. Angamos 2520, Lima (Peru)

    2015-10-15

    The absorbed dose in lungs of an adult patient has been evaluated using the biokinetics of radiopharmaceuticals containing Xe{sup 133} or Tc{sup 99m} (MAA). The absorbed dose was calculated using the MIRD formalism, and the Cristy-and Eckerman lungs model. The absorbed dose in the lungs due to {sup 133}Xe is 0.00104 mGy/MBq. Here, the absorbed dose due to remaining tissue, included in the {sup 133}Xe biokinetics is not significant. The absorbed dose in the lungs, due Tc{sup 99m} (MAA), is 0.065 mGy/MBq. Approximately, 4.6% of the absorbed dose is due to organs like liver, kidneys, bladder, and the rest of tissues, included in the Tc{sup 99m} biokinetics. Here, the absorbed dose is very significant to be overlooked. The dose contribution is mainly due to photons emitted by the liver. (Author)

  20. The Field of Technology in Sweden: The Historical Take-Off of the Engineering Professions

    Directory of Open Access Journals (Sweden)

    Glenn Sjöstrand

    2013-12-01

    Full Text Available Although the engineering profession has been called “the failed profession” owing to its lack of social closure, engineers have been successful in claiming their area of expertise and specialized knowledge as legitimate areas of research, knowledge, and intervention. In this article, the historical development of engineering professions in Sweden is used as a case of professional development. With the use of primary statistical sources and secondary historical sources, I endeavor to explain engineers’ professional development via coinciding factors such as the expansion and scientific content of lower and higher engineering education, the struggle for power in interest groups and unions, and engineers’ position in what seems to be an ever-increasingly diversified labor market. I argue that the professionalization process for Swedish engineers has fluctuated and that more than one professional take-off (two or even three has occurred.

  1. Hover performance estimation and validation of battery powered vertical takeoff and landing aircraft

    Institute of Scientific and Technical Information of China (English)

    王波; 侯中喜; 鲁亚飞; 朱雄峰

    2016-01-01

    Battery powered vertical takeoff and landing (VTOL) aircraft attracts more and more interests from public, while limited hover endurance hinders many prospective applications. Based on the weight models of battery, motor and electronic speed controller, the power consumption model of propeller and the constant power discharge model of battery, an efficient method to estimate the hover endurance of battery powered VTOL aircraft was presented. In order to understand the mechanism of performance improvement, the impacts of propulsion system parameters on hover endurance were analyzed by simulations, including the motor power density, the battery capacity, specific energy and Peukert coefficient. Ground experiment platform was established and validation experiments were carried out, the results of which showed a well agreement with the simulations. The estimation method and the analysis results could be used for optimization design and hover performance evaluation of battery powered VTOL aircraft.

  2. Power Take-off System for Marine Renewable Devices, CRADA Number CRD-14-566

    Energy Technology Data Exchange (ETDEWEB)

    Muljadi, Eduard [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-13

    Ocean Renewable Power Company (ORPC) proposes a project to develop and test innovative second-generation power take-off (PTO) components for the U.S. Department of Energy's 2013 FOA: Marine and Hydrokinetic System Performance Advancement, Topic Area 2 (Project). Innovative PTO components will include new and improved designs for bearings, couplings and a subsea electrical generator. Specific project objectives include the following: (1) Develop components for an advanced PTO suitable for MHK devices; (2) Bench test these components; (3) Assess the component and system performance benefits; (4) Perform a system integration study to integrate these components into an ORPC hydrokinetic turbine. National Renewable Energy Laboratory (NREL) will participate on the ORPC lead team to review design of the generator and will provide guidance on the design. Based on inputs from the project team, NREL will also provide an economic analysis of the impacts of the proposed system performance advancements.

  3. Study of turning takeoff maneuver in free-flying dragonflies: effect of dynamic coupling

    CERN Document Server

    Zeyghami, Samane

    2015-01-01

    Turning takeoff flights of several dragonflies were recorded during which a dragonfly takes off while changing the flight direction at the same time. Center of mass was elevated about 1-2 body lengths. Five of these maneuvers were selected for 3D body surface reconstruction and the body orientation measurement. In oppose to conventional banked turn model, which neglects interactions between the rotational motions, in this study we investigated the strength of the dynamic coupling by dividing pitch, roll and yaw angular accelerations into two contributions: one from aerodynamic torque and one from dynamic coupling effect. The latter term is referred to as Dynamic Coupling Acceleration (DCA). The DCA term can be measured directly from instantaneous rotational velocities of the insect. We found a strong correlation between pitch and yaw velocities at the end of each wingbeat and the time integral of the corresponding DCA term. Generation of pitch, roll and yaw torques requires different aerodynamic mechanisms an...

  4. Global Hepatic Uptake of {sup 99m}Tc-MAA During VQ Scintigraphy Secondary to Synchronous Superior and Inferior Vena Caval Obstruction: a Demonstraion of Trans-Portal Venous Collateral Pathways

    Energy Technology Data Exchange (ETDEWEB)

    Conway, Oliver; Lloyd, Simon; Gruening, Thomas [Derriford Hospital, Plymouth (United States)

    2013-12-15

    A 38-year-old woman underwent lung scintigraphy. Injection of technetium-99m macroaggregated albumin ({sup 99m}Tc-MAA) via the left antecubital fossa revealed global hepatic uptake. Review of contemporary computed tomography (CT) imaging demonstrated synchronous superior and inferior vena cava (SVC and IVC) obstruction, with formation of systemic-portal venous collateral pathways. Systemic-portal venous collateralisation can in rare circumstances lead to focal hepatic uptake of {sup 99m}Tc-MAA during lung scintigraphy. This case of global hepatic uptake, secondary to synchronous SVC and IVC obstruction, demonstrates the trans-portal venous collateral pathways leading to this unusual imaging outcome.

  5. A new 3D Eikonal solver for accurate traveltimes, take-off angles and amplitudes

    Science.gov (United States)

    Noble, Mark; Gesret, Alexandrine

    2013-04-01

    The finite-difference approximation to the eikonal equation was first introduced by J.Vidale in 1988 to propagate first-arrival times throughout a 2D or 3D gridded velocity model. Even today this method is still very attractive from a computational point of view when dealing with large datasets. Among many domains of application, the eikonal solver may be used for 2-D or 3-D depth migration, tomography or microseismicity data analysis. The original 3D method proposed by Vidale in 1990 did exhibit some degree of travel time error that may lead to poor image focusing in migration or inaccurate velocities estimated via tomographic inversion. The method even failed when large and sharp velocity contrasts were encountered. To try and overcome these limitations many authors proposed alternative algorithms, incorporating new finite-difference operators and/or new schemes of implementing the operators to propagate the travel times through the velocity model. If many recently published algorithms for resolving the 3D eikonal equation do yield fairly accurate travel times for most applications, the spatial derivatives of travel times remain very approximate and prevent reliable computation of auxiliary quantities such as take-off angle and amplitude. This limitation is due to the fact that the finite-difference operators locally assume that the wavefront is flat (plane wave). This assumption is in particularly wrong when close to the source where a spherical approximation would be more suitable. To overcome this singularity at the source, some authors proposed an adaptive method that reduces inaccuracies, however, the cost is more algorithmic complexity. The objective of this study is to develop an efficient simple 3D eikonal solver that is able to: overcome the problem of the source singularity, handle velocity models that exhibit strong vertical and horizontal velocity variations, use different grid spacing in x, y and z axis of model. The final goal is of course to

  6. Fatiguing effect of multiple take-offs and landings in regional airline operations.

    Science.gov (United States)

    Honn, Kimberly A; Satterfield, Brieann C; McCauley, Peter; Caldwell, J Lynn; Van Dongen, Hans P A

    2016-01-01

    Fatigue is a risk factor for flight performance and safety in commercial aviation. In US commercial aviation, to help to curb fatigue, the maximum duration of flight duty periods is regulated based on the scheduled start time and the number of flight segments to be flown. There is scientific support for regulating maximum duty duration based on scheduled start time; fatigue is well established to be modulated by circadian rhythms. However, it has not been established scientifically whether the number of flight segments, per se, affects fatigue. To address this science gap, we conducted a randomized, counterbalanced, cross-over study with 24 active-duty regional airline pilots. Objective and subjective fatigue was compared between a 9-hour duty day with multiple take-offs and landings versus a duty day of equal duration with a single take-off and landing. To standardize experimental conditions and isolate the fatiguing effect of the number of segments flown, the entire duty schedules were carried out in a high-fidelity, moving-base, full-flight, regional jet flight simulator. Steps were taken to maintain operational realism, including simulated airplane inspections and acceptance checks, use of realistic dispatch releases and airport charts, real-world air traffic control interactions, etc. During each of the two duty days, 10 fatigue test bouts were administered, which included a 10-minute Psychomotor Vigilance Test (PVT) assessment of objective fatigue and Samn-Perelli (SP) and Karolinska Sleepiness Scale (KSS) assessments of subjective sleepiness/fatigue. Results showed a greater build-up of objective and subjective fatigue in the multi-segment duty day than in the single-segment duty day. With duty start time and duration and other variables that could impact fatigue levels held constant, the greater build-up of fatigue in the multi-segment duty day was attributable specifically to the difference in the number of flight segments flown. Compared to findings in

  7. Using EMGs and kinematics data to study the take-off technique of experts and novices for a pole vaulting short run-up educational exercise.

    Science.gov (United States)

    Bassement, Maud; Garnier, Cyril; Goss-Sampson, Mark; Watelain, Eric; Lepoutre, François-Xavier

    2010-09-01

    This study attempts to characterise the electromyographic activity and kinematics exhibited during the performance of take-off for a pole vaulting short run-up educational exercise, for different expertise levels. Two groups (experts and novices) participated in this study. Both groups were asked to execute their take-off technique for that specific exercise. Among the kinematics variables studied, the knee, hip and ankle angles and the hip and knee angular velocities were significantly different. There were also significant differences in the EMG variables, especially in terms of (i) biceps femoris and gastrocnemius lateralis activity at touchdown and (ii) vastus lateralis and gastrocnemius lateralis activity during take-off. During touchdown, the experts tended to increase the stiffness of the take-off leg to decrease braking. Novices exhibited less stiffness in the take-off leg due to their tendency to maintain a tighter knee angle. Novices also transferred less energy forward during take-off due to lack of contraction in the vastus lateralis, which is known to contribute to forward energy transfers. This study highlights the differences in both groups in terms of muscular and angular control according to the studied variables. Such studies of pole vaulting could be useful to help novices to learn expert's technique.

  8. Hunting archer fish match their take-off speed to distance from the future point of catch.

    Science.gov (United States)

    Wöhl, Saskia; Schuster, Stefan

    2006-01-01

    Archer fish can shoot down insect prey with a sharp jet of water. Fish usually fire from positions that are not directly below their target so that a dislodged insect falls ballistically with a horizontal velocity component. Only 100 ms after the insect is on its path both the shooter and other school members can initiate a rapid turn and then head straight in the direction of the later point of impact of their falling prey. The quick turn and subsequent take-off are performed ;open-loop', based on the initial values of the falling insect's motion. We report here that archer fish can not only take off in the direction of the later point of impact but also predict its distance. Distance information allows the fish to adjust their take-off speed so that they would arrive within a narrow time slot slightly (about 50 ms) after their prey's impact, despite large differences in the size of the aligning turn and in the distance to be covered. Selecting a constant speed program with matched speed and catching the insect on the move minimizes frictional losses. The initial speed of starting fish is slightly but systematically too slow and is increased later so that the fish arrive 20 ms earlier than expected and often make the catch on a higher than take-off speed. The variability of later speed changes suggests a systematic ;error' in the take-off, as if the fish underestimated distance. However, this apparent deficiency seems well adapted to the fish catching their prey at a high speed: if later the fish had no possibility to correct an initial error then it is better to start slightly too slow in order to minimize the risk of overshooting the point of catch.

  9. Probabilistic model, analysis and computer code for take-off and landing related aircraft crashes into a structure

    Energy Technology Data Exchange (ETDEWEB)

    Glaser, R.

    1996-02-06

    A methodology is presented that allows the calculation of the probability that any of a particular collection of structures will be hit by an aircraft in a take-off or landing related accident during a specified window of time with a velocity exceeding a given critical value. A probabilistic model is developed that incorporates the location of each structure relative to airport runways in the vicinity; the size of the structure; the sizes, types, and frequency of use of commercial, military, and general aviation aircraft which take-off and land at these runways; the relative frequency of take-off and landing related accidents by aircraft type; the stochastic properties of off-runway crashes, namely impact location, impact angle, impact velocity, and the heading, deceleration, and skid distance after impact; and the stochastic properties of runway overruns and runoffs, namely the position at which the aircraft exits the runway, its exit velocity, and the heading and deceleration after exiting. Relevant probability distributions are fitted from extensive commercial, military, and general aviation accident report data bases. The computer source code for implementation of the calculation is provided.

  10. Conceptual Design of a Vertical Takeoff and Landing Unmanned Aerial Vehicle with 24-HR Endurance

    Science.gov (United States)

    Fredericks, William J.

    2010-01-01

    This paper describes a conceptual design study for a vertical takeoff and landing (VTOL) unmanned aerial vehicle (UAV) that is able to carry a 25-lb science payload for 24 hr and is able to land and take off at elevations as high as 15,000 ft without human intervention. In addition to the science payload, this vehicle must be able to carry a satellite communication system, and the vehicle must be able to be transported in a standard full-size pickup truck and assembled by only two operators. This project started with a brainstorming phase to devise possible vehicle configurations that might satisfy the requirements. A down select was performed to select a near-term solution and two advanced vehicle concepts that are better suited to the intent of the mission. Sensitivity analyses were also performed on the requirements and the technology levels to obtain a better understanding of the design space. This study found that within the study assumptions the mission is feasible; the selected concepts are recommended for further development.

  11. Mathematical model for takeoff simulation of a wing in proximity to the ground

    Science.gov (United States)

    Kinaci, Omer Kemal

    2016-06-01

    Aircraft flying close to the ground benefit from enhanced efficiency owing to decreased induced drag and increased lift. In this study, a mathematical model is developed to simulate the takeoff of a wing near the ground using an Iterative Boundary Element Method (IBEM) and the finite difference scheme. Two stand-alone sub-codes and a mother code, which enables communication between the sub-codes, are developed to solve for the self-excitation of the Wing-In-Ground (WIG) effect. The aerodynamic force exerted on the wing is calculated by the first sub-code using the IBEM, and the vertical displacement of the wing is calculated by the second sub-code using the finite difference scheme. The mother code commands the two sub-codes and can solve for the aerodynamics of the wing and operating height within seconds. The developed code system is used to solve for the force, velocity, and displacement of an NACA6409 wing at a 4° Angle of Attack (AoA) which has various numerical and experimental studies in the literature. The effects of thickness and AoA are then investigated and conclusions were drawn with respect to generated results. The proposed model provides a practical method for understanding the flight dynamics and it is specifically beneficial at the pre-design stages of a WIG effect craft.

  12. Concentric circles based simple optical landing aid for vertical takeoff and landing aircrafts

    Science.gov (United States)

    Murshid, Syed H.; Enaya, Rayan; Lovell, Gregory L.

    2014-09-01

    Vertical takeoff and landing (VTOL) aircrafts such as helicopters and drones, add a flexible degree of operation to airborne vehicles. In order to operate these devices in low light situations, where it is difficult to determine slope of the landing surface, a lightweight and standalone device is proposed here. This small optical device can be easily integrated into current VTOL systems. An optical projector consisting of low power, light weight, solid state laser along with minimal optics is utilized to illuminate the landing surface with donut shaped circles and coaxial centralized dot. This device can placed anywhere on the aircraft and a properly placed fiber system can be used to illuminate the surface beneath the bottom of the VTOL aircraft in a fashion that during operation, when the aircraft is parallel to the landing surface, the radius between the central dot and outer ring(s) are equidistant for the entire circumference; however, when there the landing surface of the VTOL aircraft is not parallel to the landing strip, the radial distance between two opposite sides of the circle and central dot will be unequal. The larger this distortion, the greater the difference will be between the opposite sides of the circle. Visual confirmation or other optical devices can be used to determine relative alignment of the projector output allowing the pilot to make proper adjustments as they approach the landing surface to ensure safe landings. Simulated and experimental results from a prototype optical projector are presented here.

  13. Far-field noise and internal modes from a ducted propeller at simulated aircraft takeoff conditions

    Science.gov (United States)

    Woodward, Richard P.; Bock, Lawrence A.; Heidelberg, Laurence J.; Hall, David G.

    1992-01-01

    The ducted propeller offers structural and acoustic benefits typical of conventional turbofan engines while retaining much of the aeroacoustic benefits of the unducted propeller. A model Advanced Ducted Propeller (ADP) was tested in the NASA Lewis Low-Speed Anechoic Wind Tunnel at a simulated takeoff velocity of Mach 0.2. The ADP model was designed and manufactured by the Pratt and Whitney Division of United Technologies. The 16-blade rotor ADP was tested with 22- and 40-vane stators to achieve cut-on and cut-off criterion with respect to propagation of the fundamental rotor-stator interaction tone. Additional test parameters included three inlet lengths, three nozzle sizes, two spinner configurations, and two rotor rub strip configurations. The model was tested over a range of rotor blade setting angles and propeller axis angles-of-attack. Acoustic data were taken with a sideline translating microphone probe and with a unique inlet microphone probe which identified inlet rotating acoustic modes. The beneficial acoustic effects of cut-off were clearly demonstrated. A 5 dB fundamental tone reduction was associated with the long inlet and 40-vane sector, which may relate to inlet duct geometry. The fundamental tone level was essentially unaffected by propeller axis angle-of-attack at rotor speeds of at least 96 percent design.

  14. Preparation of multihollow P(St-MAA) particles by sequence soap-free/soap emulsion polymerization and followed by stepwise alkali/acid posttreatment

    Institute of Scientific and Technical Information of China (English)

    Rong Long Li; Cheng You Kan; Ze Ping Li; Yi Du; Yan Nan Cui

    2007-01-01

    The effects of ionic emulsifier, sodium dodecylbenzene sulfate (SDBS), on the formation of the multihollow structures in sub-micron sized polymer particles produced by alkali/acid posttreatment were investigated.The original latex particles with narrow size distribution were synthesized by a new sequence emulsifier-free/emulsifier emulsion copolymerization of styrene (St) and methacrylic acid (MAA).Results indicated that the pore size decreased and the pore number increased with the increase of SDBS amount, and the morphology of the posttreated latex particles was also significantly influenced by the introducing time of SDBS in the preparation of the original latex particles, and a suitable introducing time was 3 h of polymerization.

  15. A review of Dieter Maas's thoughts of social welfare%蒂特马斯社会福利思想述评

    Institute of Scientific and Technical Information of China (English)

    王方方

    2013-01-01

    In the UK and Europe and the United States social welfare policy system and founder of theory, empirical social welfare policies of the first person to do, Dieter Maas with his keen observation and unique insights, with its distinct and value orientation of pragmatic and the persevering pursuit of social equity, building a complete national welfare thought.%  作为英国和欧美国家社会政策体系与福利理论奠基人、经验性社会福利政策研究开山鼻祖,蒂特马斯以其敏锐的观察力和独到的见解,以其鲜明而务实的价值取向及对社会公平的执着追求,构建了完整的国家福利思想。

  16. Esmamuljed maaülikoolist / Kristi Kägu, Ülle Ütsik, Priit Veeroja, Simon Soll...[jt.] ; küsitlenud Sirje Pärismaa

    Index Scriptorium Estoniae

    2008-01-01

    Küsimusele, kuidas on möödunud esimesed nädalad, vastasid Maaülikooli esmakursuslased: majandusarvestuse ja finantsjuhtimise erialalt Kristi Kägu, ökonoomika ja ettevõtluse erialalt Ülle Ütsik, veemajanduse erialalt Priit Veeroja, maastikuarhitektuuri erialalt Simon Soll, kinnisvara planeerimise erialalt Merlin Henning ja liha- ja piimatehnoloogia erialalt Liina Politanova

  17. Esmamuljed maaülikoolist / Kristi Kägu, Ülle Ütsik, Priit Veeroja, Simon Soll...[jt.] ; küsitlenud Sirje Pärismaa

    Index Scriptorium Estoniae

    2008-01-01

    Küsimusele, kuidas on möödunud esimesed nädalad, vastasid Maaülikooli esmakursuslased: majandusarvestuse ja finantsjuhtimise erialalt Kristi Kägu, ökonoomika ja ettevõtluse erialalt Ülle Ütsik, veemajanduse erialalt Priit Veeroja, maastikuarhitektuuri erialalt Simon Soll, kinnisvara planeerimise erialalt Merlin Henning ja liha- ja piimatehnoloogia erialalt Liina Politanova

  18. Computed tomography hepatic arteriography has a hepatic falciform artery detection rate that is much higher than that of digital subtraction angiography and 99mTc-MAA SPECT/CT: Implications for planning 90Y radioembolization?

    Energy Technology Data Exchange (ETDEWEB)

    Burgmans, M.C., E-mail: mburgmans@hotmail.com [Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Too, C.W., E-mail: too.chow.wei@singhealth.com.sg [Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Kao, Y.H., E-mail: yung.h.kao@gmail.com [Department of Nuclear Medicine and PET, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Goh, A.S.W., E-mail: anthony.goh.s.w@sgh.com.sg [Department of Nuclear Medicine and PET, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Chow, P.K.H., E-mail: gsupc@singnet.com.sg [Department of General Surgery, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Office of Clinical Sciences, Duke-NUS Graduate Medical School Singapore, 8 College Road, Singapore 169857 (Singapore); Department of Surgical Oncology, National Cancer Center Singapore, 11 Hospital Drive, Singapore 169610 (Singapore); Tan, B.S., E-mail: tan.bien.soo@sgh.com.sg [Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Tay, K.H., E-mail: tay.kiang.hiong@sgh.com.sg [Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore); Lo, R.H.G., E-mail: richard.lo.h.g@sgh.com.sg [Department of Diagnostic Radiology, Singapore General Hospital, Outram Road, Singapore 169608 (Singapore)

    2012-12-15

    Purpose: To compare the hepatic falciform artery (HFA) detection rates of digital subtraction angiography (DSA), computed tomography hepatic arteriography (CTHA) and 99mTc-macroaggregated albumin (99mTc-MAA) single photon emission computed tomography with integrated CT (SPECT/CT) and to correlate HFA patency with complication rates of yttrium-90 (90Y) radioembolization. Material and methods: From August 2008 to November 2010, 79 patients (range 23–83 years, mean 62.3 years; 67 male) underwent pre-treatment DSA, CTHA and 99mTc-MAA scintigraphy (planar/SPECT/CT) to assess suitability for radioembolization with 90Y resin microspheres. Thirty-seven patients were excluded from the study, because CTHA was performed with a catheter position that did not result in opacification of the liver parenchyma adjacent to the falciform ligament. DSA, CTHA and 99mTc-MAA SPECT/CT images and medical records were retrospectively reviewed. Results: A patent HFA was detected in 22 of 42 patients (52.3%). The HFA detection rates of DSA, CTHA and 99mTc-MAA SPECT/CT were 11.9%, 52.3% and 13.3%, respectively (p < 0.0001). An origin from the segment 4 artery was seen in 51.7% of HFAs. Prophylactic HFA coil-embolization prior to 90Y microspheres infusion was performed in 2 patients. Of the patients who underwent radioembolization with a patent HFA, none developed supra-umbilical radiation dermatitis. One patient experienced epigastric pain attributed to post-embolization syndrome and was managed conservatively. Conclusion: The HFA detection rate of CTHA is superior to that of DSA and 99mTc-MAA SPECT/CT. Complications related to non-target radiation of the HFA vascular territory rarely occur, even in patients undergoing radioembolization with a patent HFA.

  19. Takeoff procedure simulation of carrier plane based on T-Petri%面向任务T-Petri网的舰载机出动流程仿真

    Institute of Scientific and Technical Information of China (English)

    司维超; 韩维; 宋岩

    2014-01-01

    In order to know the takeoff process of carrier plane definitely and instruct its action better, the takeoff procedure simulation of carrier plane is researched. By analyzing the commonness about takeoff procedure and the strongpoint about Petri Net, a new task oriented model-T-Petri(Task-Petri)is proposed. T-Petri can simulate different takeoff task dynami-cally by extending its basic net simply. It simplifies takeoff procedure, satisfies the diversity modeling demands of takeoff task and avoided complexity of repeated modeling. T-Petri is used to simulate the carrier plane takeoff procedure of Kuznetsov aircraft carrier. And the Gantt chart about takeoff procedure is given, which shows the takeoff procedure distinctly. The takeoff time expression is proposed. By comparing the takeoff time given by takeoff time expression and T-Petri simu-lation respectively, the results show that T-Petri can be used to simulate takeoff procedure of carrier plane, and the simula-tion result is precise.%为明确舰载机的出动过程,以更好地指导舰载机操作,对舰载机出动流程仿真问题进行研究。在分析舰载机出动流程共性以及Petri网优点的基础上设计了一种面向任务的综合T-Petri(Task-Petri)网模型。该模型通过对基本网进行简单扩充便可以动态仿真不同的出动任务,不仅简化了出动流程,而且可以满足舰载机出动任务的多样性建模要求,避免了重复建模的复杂性。利用T-Petri网模型对库兹涅佐夫号航母舰载机出动流程进行仿真试验,并给出了甘特图,比较直观地给出了舰载机出动流程。分析给出了舰载机出动时间计算公式,将其所得的出动时间与通过T-Petri网仿真得出的出动时间进行比较,结果表明所提出的T-Petri网模型用于仿真舰载机出动流程是可行的,且结果比较精确。

  20. Discrete Displacement Hydraulic Power Take-Off System for the Wavestar Wave Energy Converter

    Directory of Open Access Journals (Sweden)

    Enrique Vidal

    2013-08-01

    Full Text Available The Wavestar Wave Energy Converter (WEC is a multiple absorber concept, consisting of 20 hemisphere shaped floats attached to a single platform. The heart of the Wavestar WEC is the Power Take-Off (PTO system, converting the wave induced motion of the floats into a steady power output to the grid. In the present work, a PTO based on a novel discrete displacement fluid power technology is explored for the Wavestar WEC. Absorption of power from the floats is performed by hydraulic cylinders, supplying power to a common fixed pressure system with accumulators for energy smoothing. The stored pressure energy is converted into electricity at a steady pace by hydraulic motors and generators. The storage, thereby, decouples the complicated process of wave power absorption from power generation. The core for enabling this PTO technology is implementing a near loss-free force control of the energy absorbing cylinders. This is achieved by using special multi-chambered cylinders, where the different chambers may be connected to the available system pressures using fast on/off valves. Resultantly, a Discrete Displacement Cylinder (DDC is created, allowing near loss free discrete force control. This paper presents a complete PTO system for a 20 float Wavestar based on the DDC. The WEC and PTO is rigorously modeled from incident waves to the electric output to the grid. The resulting model of +600 states is simulated in different irregular seas, showing that power conversion efficiencies above 70% from input power to electrical power is achievable for all relevant sea conditions.

  1. Take-off speed in jumping mantises depends on body size and a power-limited mechanism.

    Science.gov (United States)

    Sutton, G P; Doroshenko, M; Cullen, D A; Burrows, M

    2016-07-15

    Many insects such as fleas, froghoppers and grasshoppers use a catapult mechanism to jump, and a direct consequence of this is that their take-off velocities are independent of their mass. In contrast, insects such as mantises, caddis flies and bush crickets propel their jumps by direct muscle contractions. What constrains the jumping performance of insects that use this second mechanism? To answer this question, the jumping performance of the mantis Stagmomantis theophila was measured through all its developmental stages, from 5 mg first instar nymphs to 1200 mg adults. Older and heavier mantises have longer hind and middle legs and higher take-off velocities than younger and lighter mantises. The length of the propulsive hind and middle legs scaled approximately isometrically with body mass (exponent=0.29 and 0.32, respectively). The front legs, which do not contribute to propulsion, scaled with an exponent of 0.37. Take-off velocity increased with increasing body mass (exponent=0.12). Time to accelerate increased and maximum acceleration decreased, but the measured power that a given mass of jumping muscle produced remained constant throughout all stages. Mathematical models were used to distinguish between three possible limitations to the scaling relationships: first, an energy-limited model (which explains catapult jumpers); second, a power-limited model; and third, an acceleration -: limited model. Only the model limited by muscle power explained the experimental data. Therefore, the two biomechanical mechanisms impose different limitations on jumping: those involving direct muscle contractions (mantises) are constrained by muscle power, whereas those involving catapult mechanisms are constrained by muscle energy.

  2. Take-off speed in jumping mantises depends on body size and a power-limited mechanism

    Science.gov (United States)

    Doroshenko, M.; Cullen, D. A.; Burrows, M.

    2016-01-01

    ABSTRACT Many insects such as fleas, froghoppers and grasshoppers use a catapult mechanism to jump, and a direct consequence of this is that their take-off velocities are independent of their mass. In contrast, insects such as mantises, caddis flies and bush crickets propel their jumps by direct muscle contractions. What constrains the jumping performance of insects that use this second mechanism? To answer this question, the jumping performance of the mantis Stagmomantis theophila was measured through all its developmental stages, from 5 mg first instar nymphs to 1200 mg adults. Older and heavier mantises have longer hind and middle legs and higher take-off velocities than younger and lighter mantises. The length of the propulsive hind and middle legs scaled approximately isometrically with body mass (exponent=0.29 and 0.32, respectively). The front legs, which do not contribute to propulsion, scaled with an exponent of 0.37. Take-off velocity increased with increasing body mass (exponent=0.12). Time to accelerate increased and maximum acceleration decreased, but the measured power that a given mass of jumping muscle produced remained constant throughout all stages. Mathematical models were used to distinguish between three possible limitations to the scaling relationships: first, an energy-limited model (which explains catapult jumpers); second, a power-limited model; and third, an acceleration-limited model. Only the model limited by muscle power explained the experimental data. Therefore, the two biomechanical mechanisms impose different limitations on jumping: those involving direct muscle contractions (mantises) are constrained by muscle power, whereas those involving catapult mechanisms are constrained by muscle energy. PMID:27284067

  3. Far-Field Acoustic Power Level and Performance Analyses of F31/A31 Open Rotor Model at Simulated Scaled Takeoff, Nominal Takeoff, and Approach Conditions: Technical Report I

    Science.gov (United States)

    Sree, Dave

    2015-01-01

    Far-field acoustic power level and performance analyses of open rotor model F31/A31 have been performed to determine its noise characteristics at simulated scaled takeoff, nominal takeoff, and approach flight conditions. The nonproprietary parts of the data obtained from experiments in 9- by 15-Foot Low-Speed Wind Tunnel (9?15 LSWT) tests were provided by NASA Glenn Research Center to perform the analyses. The tone and broadband noise components have been separated from raw test data by using a new data analysis tool. Results in terms of sound pressure levels, acoustic power levels, and their variations with rotor speed, angle of attack, thrust, and input shaft power have been presented and discussed. The effect of an upstream pylon on the noise levels of the model has been addressed. Empirical equations relating model's acoustic power level, thrust, and input shaft power have been developed. The far-field acoustic efficiency of the model is also determined for various simulated flight conditions. It is intended that the results presented in this work will serve as a database for comparison and improvement of other open rotor blade designs and also for validating open rotor noise prediction codes.

  4. Long-term Exposure to PM10 and NO2 in Association with Lung Volume and Airway Resistance in the MAAS Birth Cohort

    Science.gov (United States)

    Agius, Raymond M.; de Vocht, Frank; Lindley, Sarah; Gerrard, William; Lowe, Lesley; Belgrave, Danielle; Custovic, Adnan; Simpson, Angela

    2013-01-01

    Background: Findings from previous studies on the effects of air pollution exposure on lung function during childhood have been inconsistent. A common limitation has been the quality of exposure data used, and few studies have modeled exposure longitudinally throughout early life. Objectives: We sought to study the long-term effects of exposure to particulate matter with an aerodynamic diameter ≤ 10 μm (PM10) and to nitrogen dioxide (NO2) on specific airway resistance (sRaw) and forced expiratory volume in 1 sec (FEV1) before and after bronchodilator treatment. Subjects were from the Manchester Asthma and Allergy Study (MAAS) birth cohort (n = 1,185). Methods: Spirometry was performed during clinic visits at ages 3, 5, 8, and 11 years. Individual-level PM10 and NO2 exposures were estimated from birth to 11 years of age through a microenvironmental exposure model. Longitudinal and cross-sectional associations were estimated using generalized estimating equations and multivariable linear regression models. Results: Lifetime exposure to PM10 and NO2 was associated with significantly less growth in FEV1 (percent predicted) over time, both before (–1.37%; 95% CI: –2.52, –0.23 for a 1-unit increase in PM10 and –0.83%; 95% CI: –1.39, –0.28 for a 1-unit increase in NO2) and after bronchodilator treatment (–3.59%; 95% CI: –5.36, –1.83 and –1.20%; 95% CI: –1.97, –0.43, respectively). We found no association between lifetime exposure and sRaw over time. Cross-sectional analyses of detailed exposure estimates for the summer and winter before 11 years of age and lung function at 11 years indicated no significant associations. Conclusions: Long-term PM10 and NO2 exposures were associated with small but statistically significant reductions in lung volume growth in children of elementary-school age. Citation: Mölter A, Agius RM, de Vocht F, Lindley S, Gerrard W, Lowe L, Belgrave D, Custovic A, Simpson A. 2013. Long-term exposure to PM10 and NO2 in

  5. Final Scientific/Technical Report: ADVANCED INTEGRATION OF POWER TAKE-OFF IN VIVACE

    Energy Technology Data Exchange (ETDEWEB)

    Simiao, Gustavo

    2014-03-21

    Vortex Hydro Energy is commercializing a University of Michigan patented MHK device, the VIVACE converter (Vortex Induced Vibration Aquatic Clean Energy). Unlike water turbines, it does not use propeller blades. Rather, river or ocean currents flow around cylinders causing them to move up and down in Flow Induced Motions (FIM). This kinetic energy of the cylinder is then converted to electricity. Importantly, the VIVACE converter is simpler in design and more cost effective than water turbines. This project accelerated the development of the VIVACE technology. Funding from the DOE enabled VHE to accelerate the development in three ways. One was to increase the efficiency of the hydrodynamics of the system. This aided in maximizing the power output for a wide range of water speeds. The second was to design, build, and test an efficient power take-off (PTO) that converted the most power from the VIVACE cylinders into electricity. This effort was necessary because of the nature of power generated using this technology. Although the PTO uses off-the-shelf components, it is specifically tuned to the specific water flow characteristics. The third way the development was accelerated was by testing the improved Beta 1B prototype over a longer period of time in a river. The greatest benefit from the longer open-water testing-period is a better understand of the power generation characteristics of the system as well as the maintenance lifespan of the device. Renewable energy generation is one of today’s most challenging global dilemmas. The energy crisis requires tapping into every source of energy and developing every technology that can generate energy at a competitive cost within the next 50 years. Development of VIVACE will bolster domestic energy security and mitigate global climate change. There are numerous commercial and military applications for a fully developed system, which could generate clean/renewable energy from small scale (1-5kW) to medium scale (500k

  6. Contribution of hand and foot force to take-off velocity for the kick-start in competitive swimming.

    Science.gov (United States)

    Takeda, Tsuyoshi; Sakai, Shin; Takagi, Hideki; Okuno, Keisuke; Tsubakimoto, Shozo

    2017-03-01

    This study examines the hand and foot reaction force recorded independently while performing the kick-start technique. Eleven male competitive swimmers performed three trials for the kick-start with maximum effort. Three force platforms (main block, backplate and handgrip) were used to measure reaction forces during starting motion. Force impulses from the hands, front foot and rearfoot were calculated via time integration. During the kick-start, the vertical impulse from the front foot was significantly higher than that from the rearfoot and the horizontal impulse from the rearfoot was significantly higher than that from the front foot. The force impulse from the front foot was dominant for generating vertical take-off velocity and the force impulse from the rearfoot was dominant for horizontal take-off velocity. The kick-start's shorter block time in comparison to prior measurements of the grab start was explained by the development of horizontal reaction force from the hands and the rearfoot at the beginning of the starting motion.

  7. Numerical Investigation of Cowl Lip Adjustments for a Rocket-Based Combined-Cycle Inlet in Takeoff Regime

    Science.gov (United States)

    Shi, Lei; Liu, Xiaowei; He, Guoqiang; Qin, Fei; Wei, Xianggeng; Yang, Bing; Wu, Lele

    2016-09-01

    Numerical integration simulations were performed on a ready-made central strut-based rocket-based combined-cycle (RBCC) engine operating in the ejector mode during the takeoff regime. The effective principles of various cowl lip positions and shapes on the inlet operation and the overall performance of the entire engine were investigated in detail. Under the static condition, reverse cowl lip rotation in a certain range was found to contribute comprehensive improvement to the RBCC inlet and the entire engine. However, the reverse rotation of the cowl lip contributed very little enhancement of the RBCC inlet under the low subsonic flight regime and induced extremely negative impacts in the high subsonic flight regime, especially in terms of a significant increase in the drag of the inlet. Changes to the cowl lip shape provided little improvement to the overall performance of the RBCC engine, merely shifting the location of the leeward area inside the RBCC inlet, as well as the flow separation and eddy, but not relieving or eliminating those phenomena. The results of this study indicate that proper cowl lip rotation offers an efficient variable geometry scheme for a RBCC inlet in the takeoff regime.

  8. Does Step Length Adjustment Determine Take-Off Accuracy and Approach Run Velocity in Long and Triple Jumps?

    Directory of Open Access Journals (Sweden)

    Hubert Makaruk

    2015-09-01

    Full Text Available Purpose. While take-off accuracy and approach run velocity are known determinants of long and triple jump performance, the interaction of these factors with step length adjustment (SLA is not as clear. Methods. The study involved 39 male and 31 female national-level long and triple jumpers. The Optojump Next device was used to analyse jump attempts. Three groups were identified according to maximum variability of footfall placement (HVF - high, MVF - medium, LVF - Low as well as three groups regarding the onset of step length adjustment (ESLA - early, MSLA - mid, LSLA - late. Results. Take-off accuracy in the LVF and MVF groups was greater compared with the HVF group among females. Among males, the LVF group made significantly (p < 0.05 fewer foul attempts than the HVF group. The ESLA group achieved significantly (p < 0.05 higher velocity during the last five steps of the approach run than the LSLA group in men. Conclusions. Coaches should implement exercises targeting SLA in long and triple jump training exercises to improve performance.

  9. Low-elevation tracking technique for X-band unmanned aerial vehicle automatic take-off and landing system

    Science.gov (United States)

    Lin, S.-Y.; Cho, M.-H.; Lin, M.-Y.; Hu, W.-Y.; Sun, J.-S.

    2017-05-01

    In this study, an automatic take-off and landing system (ATOLS) based on radar guidance was developed to provide day/night, all weather, automatic takeoff and landing for unmanned aerial vehicles (UAVs). The ATOLS contains a ground-based tracking radar subsystem and an airborne transponder subsystem. This X-band tracking radar can provide precise position information for UAV-control operations (transponder mode) and fire-control systems (skin mode). It provides 360 degrees of azimuth coverage and therefore can be employed for navigation applications. Its maximum tracking range is about 17 km and accuracy of altitude measurement is about 1 ft with a 50-ft decision height above ground level. To substantiate the proposed ATOLS system, a differential global positioning system (DGPS) was also developed. When a UAV at a low-elevation angle is detected and tracked by a tracking radar, multipath propagation often leads to the degradation of tracking accuracy or even cause the radar to break track. As a result, it becomes a potential risk to flight safety of the ATOLS guidance and control of UAVs. To overcome this technical difficulty, this paper proposes a solution based on optimization of radar parameters to mitigate the interference from multipath signals. The feasibility of proposed method has been experimentally proven through the flight trials of UAVs. Compared to the conventional low-elevation tracking techniques, the proposed one employs the radar signal processing, and does not consume additional hardware and resources.

  10. Distribution of lung blood on modified bilateral Glenn shunt evaluated by Tc-99m-MAA lung perfusion scintigraphy: A retrospective study.

    Science.gov (United States)

    Si, Biao; Luan, Zhao-Sheng; Wang, Tong-Jian; Ning, Yan-Song; Li, Na; Zhu, Meng; Liu, Zhong-Min; Ding, Guang-Hong; Qiao, Bin

    2016-09-01

    The aim of the present study was to determine the distribution of lung blood in a modified bilateral Glenn procedure designed in our institute with lung perfusion scintigraphy. Sixteen consecutive patients who underwent modified bilateral Glenn operation from 2011 to 2014 were enrolled in the study. The control group consisted of 7 patients who underwent bidirectional Glenn shunt. Radionuclide lung perfusion scintigraphy was performed using Tc-99m-macro aggregated albumin (MAA) in all patients. For the patients in modified bilateral Glenn group, the time at which the radioactivity accumulation peaked did not differ significantly between the right and left lung field (t = 0.608, P = 0.554). The incidence of perfusion abnormality in each lung lobe also did not differ significantly (P = 0.426 by Fisher exact test). The radioactive counts were higher in the right lung than in the left lung, but the difference was not statistically significant (t = 1.502, P = 0.157). Radioactive perfusion in the lower lung field was significantly greater than that in the upper field (t = 4.368, P lung to that in left lung was significantly lower in the modified bilateral Glenn group (t = 3.686, P = 0.002). Lung perfusion scintigraphy confirmed the benefit of the modified bilateral Glenn shunt with regard to more balanced blood perfusion in both lungs.

  11. Extracts of Renealmia alpinia (Rottb. MAAS Protect against Lethality and Systemic Hemorrhage Induced by Bothrops asper Venom: Insights from a Model with Extract Administration before Venom Injection

    Directory of Open Access Journals (Sweden)

    Arley Camilo Patiño

    2015-04-01

    Full Text Available Renealmia alpinia (Rottb. MAAS, obtained by micropropagation (in vitro and wild forms have previously been shown to inhibit some toxic activities of Bothrops asper snake venom if preincubated before injection. In this study, assays were performed in a murine model in which extracts were administered for three days before venom injection. R. alpinia extracts inhibited lethal activity of B. asper venom injected by intraperitoneal route. Median Effective Dose (ED50 values were 36.6 ± 3.2 mg/kg and 31.7 ± 5.4 mg/kg (p > 0.05 for R. alpinia wild and in vitro extracts, respectively. At a dose of 75 mg/kg, both extracts totally inhibited the lethal activity of the venom. Moreover, this dose prolonged survival time of mice receiving a lethal dose of venom by the intravenous route. At 75 mg/kg, both extracts of R. alpinia reduced the extent of venom-induced pulmonary hemorrhage by 48.0% (in vitro extract and 34.7% (wild extract, in agreement with histological observations of lung tissue. R. alpinia extracts also inhibited hemorrhage in heart and kidneys, as evidenced by a decrease in mg of hemoglobin/g of organ. These results suggest the possibility of using R. alpinia as a prophylactic agent in snakebite, a hypothesis that needs to be further explored.

  12. Effectiveness of quantitative MAA SPECT/CT for the definition of vascularized hepatic volume and dosimetric approach: phantom validation and clinical preliminary results in patients with complex hepatic vascularization treated with yttrium-90-labeled microspheres.

    Science.gov (United States)

    Garin, Etienne; Lenoir, Laurence; Rolland, Yan; Laffont, Sophie; Pracht, Marc; Mesbah, Habiba; Porée, Philippe; Ardisson, Valérie; Bourguet, Patrick; Clement, Bruno; Boucher, Eveline

    2011-12-01

    The goal of this study was to assess the use of quantitative single-photon emission computed tomography/computed tomography (SPECT/CT) analysis for vascularized volume measurements in the use of the yttrium-90-radiolabeled microspheres (TheraSphere). A phantom study was conducted for the validation of SPECT/CT volume measurement. SPECT/CT quantitative analysis was used for the measurement of the volume of distribution of the albumin macroaggregates (MAA; i.e., the vascularized volume) in the liver and the tumor, and the total activity contained in the liver and the tumor in four consecutive patients presenting with a complex liver vascularization referred for a treatment with TheraSphere. SPECT/CT volume measurement proved to be accurate (mean error data, instead of angiography and CT data, results in modifying the activity injected for three treatments of eight. Moreover, quantitative analysis of SPECT/CT allows us to calculate the absorbed dose in the tumor and in the healthy liver, leading to doubling of the injected activity for one treatment of eight. MAA SPECT/CT is accurate for volume measurements. It provides a valuable contribution to the therapeutic planning of patients presenting with complex hepatic vascularization, in particular for calculating the vascularized liver volume, the activity to be injected and the absorbed doses. Studies should be conducted to assess the role of quantitative MAA/SPECT CT in therapeutic planning.

  13. Evaluation of Landing Characteristics Achieved by Simulations and Flight Tests on a Small-scaled Model Related to Magnetically Levitated Advanced Take-off and Landing Operations

    NARCIS (Netherlands)

    Rohacs, D.; Voskuijl, M.; Siepenkotter, N.

    2014-01-01

    The goal of this paper is to simulate and measure on a small-scaled model the landing characteristics related to take-off and landing (TOL) operations supported by a magnetic levitation (MAGLEV) system as ground-based power supply. The technical feasibility and the potential benefits of using ground

  14. Mechanical design and modeling of a single-piston pump for the novel power take-off system of a wave energy converter

    NARCIS (Netherlands)

    Vakis, Antonis I.; Anagnostopoulos, John S.

    2016-01-01

    A multi-pump, multi-piston power take-off wave energy converter ((MPPTO)-P-2 WEC) has been proposed for use with a novel renewable energy harvester termed the Ocean Grazer. The (MPPTO)-P-2 WEC utilizes wave motion to pump via buoys connected to pistons working fluid within a closed circuit and store

  15. A comparison of take-off dynamics during three different spikes, block and counter-movement jump in female volleyball players.

    Science.gov (United States)

    Kabacinski, Jaroslae; Dworak, Lecholslaw B; Murawa, Michal; Ostarello, John; Rzepnicka, Agata; Maczynski, Jacek

    2016-12-01

    The purpose of the study was to compare the take-off dynamics in counter-movement jump (CMJ), volleyball block and spikes. Twelve professional female players, representing the highest volleyball league in Poland, participated in the laboratory tests. A force platform was used to record ground reaction force (GRF) during take-off phase in CMJ test, block from a run-up and spikes: front row attack, slide attack, back row attack. Vertical (v) GRF (peak: Rmax and integral mean: ), impulse of vGRF (J) and mechanical power (peak: Pmax and integral mean: ) were analyzed. Significant differences (P, J, Pmax, and ) were found between CMJ, block from a run-up and three different technique spikes. The highest values were recorded during take-off in the back row attack: peak vGRF (2.93±0.05 BW), integral mean vGRF (1.90±0.08 BW), impulse of vGRF (354±40 Ns), peak power (5320±918 W) and integral mean power (3604±683 W). Peak power (2608±217 W) and integral mean power (1417±94 W) were determined in CMJ test to evaluate the force-velocity capabilities of the players. In terms of GRF and the mechanical power, high level of dynamics in take-off influences positively the jumping height and significantly increases the effectiveness of attacks during spike of the ball over the block of the opponent.

  16. Investigating the Adaptability of the Multi-Pump Multi-Piston Power Take-Off System for a Novel Wave Energy Converter

    NARCIS (Netherlands)

    Wei, Y.; Barradas Berglind, J.J; van Rooij, M.; Prins, WA; Jayawardhana, B.; Vakis, A. I.

    2017-01-01

    In this work, a numerical model is developed in order to investigate the adaptability of the multi-pump multi-piston power take-off (MP2PTO) system of a novel wave energy converter (WEC). This model is realized in the MATLAB/SIMULINK environment, using the multi-body dynamics solver Multibody™, whic

  17. Evaluation of Landing Characteristics Achieved by Simulations and Flight Tests on a Small-scaled Model Related to Magnetically Levitated Advanced Take-off and Landing Operations

    NARCIS (Netherlands)

    Rohacs, D.; Voskuijl, M.; Siepenkotter, N.

    2014-01-01

    The goal of this paper is to simulate and measure on a small-scaled model the landing characteristics related to take-off and landing (TOL) operations supported by a magnetic levitation (MAGLEV) system as ground-based power supply. The technical feasibility and the potential benefits of using ground

  18. 31 CFR 585.208 - Prohibited overflights, takeoffs and landings of aircraft en route to or from the FRY (S&M).

    Science.gov (United States)

    2010-07-01

    ... landings of aircraft en route to or from the FRY (S&M). 585.208 Section 585.208 Money and Finance: Treasury..., takeoffs and landings of aircraft en route to or from the FRY (S&M). Except as otherwise authorized, no... off from the territory of the FRY (S&M). See also: Special Federal Aviation Regulation (SFAR) No....

  19. Design of A Hydraulic Power Take-off System for the Wave Energy Device with An Inverse Pendulum

    Institute of Scientific and Technical Information of China (English)

    张大海; 李伟; 赵海涛; 鲍经纬; 林勇刚

    2014-01-01

    This paper describes a dual-stroke acting hydraulic power take-off (PTO) system employed in the wave energy converter (WEC) with an inverse pendulum. The hydraulic PTO converts slow irregular reciprocating wave motions to relatively smooth, fast rotation of an electrical generator. The design of the hydraulic PTO system and its control are critical to maximize the generated power. A time domain simulation study and the laboratory experiment of the full-scale beach test are presented. The results of the simulation and laboratory experiments including their comparison at full-scale are also presented, which have validated the rationality of the design and the reliability of some key components of the prototype of the WEC with an inverse pendulum with the dual-stroke acting hydraulic PTO system.

  20. Model Predictive Control-based Power take-off Control of an Oscillating Water Column Wave Energy Conversion System

    Science.gov (United States)

    Rajapakse, G.; Jayasinghe, S. G.; Fleming, A.; Shahnia, F.

    2017-07-01

    Australia’s extended coastline asserts abundance of wave and tidal power. The predictability of these energy sources and their proximity to cities and towns make them more desirable. Several tidal current turbine and ocean wave energy conversion projects have already been planned in the coastline of southern Australia. Some of these projects use air turbine technology with air driven turbines to harvest the energy from an oscillating water column. This study focuses on the power take-off control of a single stage unidirectional oscillating water column air turbine generator system, and proposes a model predictive control-based speed controller for the generator-turbine assembly. The proposed method is verified with simulation results that show the efficacy of the controller in extracting power from the turbine while maintaining the speed at the desired level.

  1. Kosmosest maa peale / Alina Kurvits

    Index Scriptorium Estoniae

    Kurvits, Alina

    2004-01-01

    Eesti noorte moeloojate võistlusest "Supernoova 2004". Üksikute finalistide kollektsioonide iseloomustus - Heleliis Hõim, Kati Ilves, Lemmiki Ehatamm, Triin Kaiv, Kaisa Reimand, Marin Sild, Maria Ossadtsaja, Kris Lemsalu, Ingel Undusk, Mari Hiietamm, Kaspar Paas, Maarja Metspalu, Kätlin Kaljuvee, Marje Mõttus, Julia Korovina, Külli-Kerttu Siplane,Piret Paal, Raili Nõlvak, Oksana Tandit, Vassilissa Shehovtsova

  2. Kontrastide maa Brasiilia / Meelis Joost

    Index Scriptorium Estoniae

    Joost, Meelis

    2011-01-01

    Artikli autor kuulus Euroopa Majandus- ja Sotsiaalkomitee delegatsioon, mis külastas lihavõttenädalale järgneval nädalal Brasiilia Majandus– ja Sotsiaalnõukogu kutsel Brasiilia Föderatsiooni pealinna Brasíliat ning riigi esimest pealinna, praegust Bahia osariigi pealinna Salvadori, et osaleda 4. EL– Brasiilia kodanikuühiskonna ümarlaual

  3. Meie maa - Rehemaa / Terje Alas

    Index Scriptorium Estoniae

    Alas, Terje

    2005-01-01

    Aiakujundaja Toomas Türk ning käsitööõpetaja ja aiakujundaja Terje Alas on kolinud oma perega elama Raplamaale Rehemaa tallu ja vahendavad vana talu elluäratamist oma uueks koduks. Talukoha valikust, hoonetest, aiast ja esimestest sammudest aia uuendamisel. 7 ill

  4. Kontrastide maa Brasiilia / Meelis Joost

    Index Scriptorium Estoniae

    Joost, Meelis

    2011-01-01

    Artikli autor kuulus Euroopa Majandus- ja Sotsiaalkomitee delegatsioon, mis külastas lihavõttenädalale järgneval nädalal Brasiilia Majandus– ja Sotsiaalnõukogu kutsel Brasiilia Föderatsiooni pealinna Brasíliat ning riigi esimest pealinna, praegust Bahia osariigi pealinna Salvadori, et osaleda 4. EL– Brasiilia kodanikuühiskonna ümarlaual

  5. Kosmosest maa peale / Alina Kurvits

    Index Scriptorium Estoniae

    Kurvits, Alina

    2004-01-01

    Eesti noorte moeloojate võistlusest "Supernoova 2004". Üksikute finalistide kollektsioonide iseloomustus - Heleliis Hõim, Kati Ilves, Lemmiki Ehatamm, Triin Kaiv, Kaisa Reimand, Marin Sild, Maria Ossadtsaja, Kris Lemsalu, Ingel Undusk, Mari Hiietamm, Kaspar Paas, Maarja Metspalu, Kätlin Kaljuvee, Marje Mõttus, Julia Korovina, Külli-Kerttu Siplane,Piret Paal, Raili Nõlvak, Oksana Tandit, Vassilissa Shehovtsova

  6. Size tuning of MAA capped CdSe and CdSe/CdS quantum dots and their stability in different pH environments

    Energy Technology Data Exchange (ETDEWEB)

    Kaur, Gurvir; Tripathi, S.K., E-mail: surya@pu.ac.in

    2014-01-15

    The present work reports synthesis of mercaptoacetic acid capped CdSe nanoparticles soluble in water at different temperatures and with different precursor ratios. This enabled to tune the particle size of QDs from 2.7 to 5.8 nm. The particles consist of nanocrystals; with mixed phase, hexagonal wurtzite as well as sphalerite cubic and are luminescent with quantum yield 10%. The quantum yield up to 20% has been obtained by growing a shell of CdS over the CdSe. HR-TEM images, XRD patterns and the photoluminescence excitation spectra shows epitaxial growth of CdS shell over CdSe and with average size 3.2 ± 1.2 and 4.7 ± 1.2 nm for CdSe and CdSe/CdS quantum dots respectively. FT-IR spectrum and the negative zeta potential value together confirms the attachment of mercaptoacetic acid to the QD surface, where the carboxylic acid group is facing towards solvent and provides stability due to electrostatic hindrance. Further, the QDs are checked for their stability and the luminescence in environments of different pH (4–11 pH). Both CdSe and CdSe/CdS agglomerate with total elimination of fluorescence for 4 pH medium, and no shift in the fluorescence emission peak observed for the 6–9 pH, therefore QDs can be applicable as the fluorescence tags in this specific range of pH. - Highlights: • Synthesis of MAA capped CdSe and CdSe/CdS core/shell QDs. • Synthesis temperature and precursor ratio controls the growth of QDs. • PLE spectra shows four kind of absorption features for CdSe QDs. • Growth of CdS shell over CdSe core has not affected the energy levels of the core. • CdSe and CdSe/CdS QDs are not stable in low pH (less than 6) environments.

  7. 甲基丙烯酸-丙烯醛共聚物/蒙脱土纳米复合材料的合成与性能%SYNTHESIS AND PROPERTIES OF POLY(MAA-co-AL)/MMT NANOCOMPOSITE

    Institute of Scientific and Technical Information of China (English)

    鲍艳; 马建中

    2008-01-01

    采用水溶性聚合单体甲基丙烯酸和丙烯醛在钠基蒙脱土层间直接原位插层聚合制备水溶性甲基丙烯酸-丙烯醛共聚物/蒙脱土纳米复合材料,并采用X射线衍射、透射电镜、红外光谱、热分析仪等对纳米复合材料的结构进行表征.结果表明:聚合物分子与黏土片层之间具有相互作用,甲基丙烯酸和丙烯醛在蒙脱土层问成功发生了聚合,所制备的纳米复合材料属于剥离型纳米复合材料.与未改性的聚合物基体相比,纳米复合材料的热分解温度提高了20多度.与纯铬粉鞣制的胶原相比,采用6%(质量分数,下同)纳米复合材料结合2%铬粉处理胶原可使胶原的各方面性能均得到较大改善,同时,废液中的铬含量减少了50%以上.%Water-soluble poly (methacrylic acid (MAA)-co-acraldehyde (AL))/montmorillonite (MMT)(poly(MAA-co-AL)/MMT)eomposites were prepared using Na+-montmorillonite (Na+-MMT) via in-situ polymerization of methacrylie acid (MAA) and acraldehyde (AL) in aqueous medium. The resulting poly(MAA-eo-AL)/MMT nanocomposites were characterized by X-ray diffrac-tion, transmission electron microscope, Fourier transform infrared spectroscopy, and thermo-gravimetric analysis. Polymer molecules and clay particles interacted with each other. Moreover, methacrylie acid and acraldehyde were polymerized in the MMT in-ter-lamellar. The nanocomposite formed could be categorized as an exfoliated nanoeomposite. It exhibites more than 20℃ im-provement in thermal degradation temperature, compared to the unmodified polymer counterpart. The improved properties of colla-gen treated with 6% (in mass, the same below) nanocomposites associated with 2% chromate are shown, in contrast to the collagen only treated with chromate. Furthermore, the chrome content of waste liquids decreases by more than 50%.

  8. Preliminary performance of a vertical-attitude takeoff and landing, supersonic cruise aircraft concept having thrust vectoring integrated into the flight control system

    Science.gov (United States)

    Robins, A. W.; Beissner, F. L., Jr.; Domack, C. S.; Swanson, E. E.

    1985-01-01

    A performance study was made of a vertical attitude takeoff and landing (VATOL), supersonic cruise aircraft concept having thrust vectoring integrated into the flight control system. Those characteristics considered were aerodynamics, weight, balance, and performance. Preliminary results indicate that high levels of supersonic aerodynamic performance can be achieved. Further, with the assumption of an advanced (1985 technology readiness) low bypass ratio turbofan engine and advanced structures, excellent mission performance capability is indicated.

  9. Intra-specific variation in wing morphology and its impact on take-off performance in blue tits (Cyanistes caeruleus) during escape flights.

    Science.gov (United States)

    McFarlane, Laura; Altringham, John D; Askew, Graham N

    2016-05-01

    Diurnal and seasonal increases in body mass and seasonal reductions in wing area may compromise a bird's ability to escape, as less of the power available from the flight muscles can be used to accelerate and elevate the animal's centre of mass. Here, we investigated the effects of intra-specific variation in wing morphology on escape take-off performance in blue tits (Cyanistes caeruleus). Flights were recorded using synchronised high-speed video cameras and take-off performance was quantified as the sum of the rates of change of the kinetic and potential energies of the centre of mass. Individuals with a lower wing loading, WL (WL=body weight/wing area) had higher escape take-off performance, consistent with the increase in lift production expected from relatively larger wings. Unexpectedly, it was found that the total power available from the flight muscles (estimated using an aerodynamic analysis) was inversely related to WL. This could simply be because birds with a higher WL have relatively smaller flight muscles. Alternatively or additionally, variation in the aerodynamic load on the wing resulting from differences in wing morphology will affect the mechanical performance of the flight muscles via effects on the muscle's length trajectory. Consistent with this hypothesis is the observation that wing beat frequency and relative downstroke duration increase with decreasing WL; both are factors that are expected to increase muscle power output. Understanding how wing morphology influences take-off performance gives insight into the potential risks associated with feather loss and seasonal and diurnal fluctuations in body mass.

  10. Water distribution uniformity improvement of microtube-type and button-type drip irrigation system using adjustable pressure-loss lateral takeoff valves

    OpenAIRE

    Ella, Victor B.; Keller, J.; Reyes, Manuel R.; R. Yoder

    2012-01-01

    Irrigation application using microtube-type and button-type drip irrigation systems tends to be relatively non-uniform especially under steep slopes and low operating heads. This study was conducted to determine the effect of using a device called Adjustable Pressure-Loss Lateral Takeoff Valves (APLTVs) on water distribution uniformity of both types of drip systems LTRA-12 (Conservation agriculture for food security in Cambodia and the Philippines)

  11. 小型气象无人机作业与起降方式试验研究%Tests of Takeoff and Landing Approach Of Small Meteorological UAV

    Institute of Scientific and Technical Information of China (English)

    吴朝晖; 刘志平; 马瑞升; 孙涵; 林宗桂

    2011-01-01

    通过对比分析2003年以来6种气象无人机起飞和5种降落方式的飞行测试,得出30Kg以下无人机的起飞和降落方式对场地的要求,以及优点和不足;试验证明,弹射起飞和伞降与滑降相结合的回收方式在民用领域中适应性最好,可广泛用于我国的山地、丘陵和平原地形环境,是经济性、安全性俱佳的小型无人机起降方式。%Basing the MUAV (Meteorological Unmanned Aerial Vehicle) flight tests of six kinds of takeoff and 5 kinds of landing approach, the space requirements for MUAV takeoff and landing were discussed, as well as the strengths and weaknesses. It shows that catapult takeoff and the recovery way of parachute combined with downhill race made a best adaptation to the civil field, which can be widely used in China's mountains, hills and plains terrain environment.

  12. MAXIMIZING HEIGHT, DISTANCE OR ROTATION FROM REAL-TIME ANALYSIS VISUALISATION OF TAKE-OFF ANGLES AND SPEED

    Directory of Open Access Journals (Sweden)

    Richard Green

    2006-12-01

    Full Text Available Studies to optimise take off angles for height or distance have usually involved either a time-consuming invasive approach of placing markers on the body in a laboratory setting or using even less efficient manual frame-by-frame joint angle calculations with one of the many sport science video analysis software tools available. This research introduces a computer-vision based, marker-free, real-time biomechanical analysis approach to optimise take-off angles based on speed, base of support and dynamically calculated joint angles and mass of body segments. The goal of a jump is usually for height, distance or rotation with consequent dependencies on speed and phase of joint angles, centre of mass COM and base of support. First and second derivatives of joint angles and body part COMs are derived from a Continuous Human Movement Recognition (CHMR system for kinematical and what-if calculations. Motion is automatically segmented using hierarchical Hidden Markov Models and 3D tracking is further stabilized by estimating the joint angles for the next frame using a forward smoothing Particle filter. The results from a study of jumps, leaps and summersaults supporting regular knowledge of results feedback during training sessions indicate that this approach is useful for optimising the height, distance or rotation of skills

  13. Takeoff and landing performance and noise measurements of a deflected slipstream STOL airplane with interconnected propellers and rotating cylinder flaps

    Science.gov (United States)

    Weiberg, J. A.; Giulianetti, D.; Gambucci, B.; Innis, R. C.

    1973-01-01

    A YOV-10A aircraft was modified to incorporate rotating cylinder flaps and interconnected propellers with Lycoming T-53-L11 engines. Flight tests were made to evaluate the low speed handling qualities and performance characteristics. The flight test results indicated that landings could be made with approach speeds of 55 to 65 knots (CL = 4.5) and descent angles of 6 deg to 8 deg for total flap angles of 60 deg to 75 deg. At higher flap angles, deterioration of stability and control characteristics precluded attempts at landing. The noise level on the ground under an 8 deg landing approach path was below 86 PNdB at distances beyond 1 nautical mile from touchdown. Takeoffs were made with 30 deg to 45 deg flaps at lift off speeds of 75 to 80 knots and climb angles of 4 deg to 8 deg. Noise levels were below 83 PNdB at 3.5 nautical miles from the start of ground roll.

  14. Noise of a model high speed counterrotation propeller at simulated takeoff/approach conditions (F7/A7)

    Science.gov (United States)

    Woodward, Richard P.

    1987-01-01

    A high speed advanced counterrotation propeller, was tested in the NASA-Lewis 9 x 15 foot Anechoic Wind Tunnel at simulated takeoff/approach conditions of 0.2 Mach number. Acoustic measurements were taken with fixed floor microphones, an axially translating microphone probe, and with a polar microphone probe which was fixed to the propeller nacelle and could take both sideline and circumferential acoustic surveys. Aerodynamic measurements were also made to establish the propeller operating conditions. The propeller was run over a range of blade setting angles from 36.4/36.5 to 41.1/39.4 deg, tip speeds from 165 to 259 m/sec, rotor spacings from 1.56 to 3.63 based on forward rotor tip chord to aerodynamic separation, and angles of attack to + or - 16 deg. First order rotor alone tones showed highest directivity levels near the propeller plane, while interaction tone showed high levels throughout sideline directivity, especially toward the propeller rotation axis. Interaction tone levels were sensitive to propeller row spacing while rotor alone tones showed little spacing effect. There is a decreased noise level associated with higher propeller blade numbers for the same overall propeller thrust.

  15. NO and NO2 emission ratios measured from in-use commercial aircraft during taxi and takeoff.

    Science.gov (United States)

    Herndon, Scott C; Shorter, Joanne H; Zahniser, Mark S; Nelson, David D; Jayne, John; Brown, Robert C; Miake-Lye, Richard C; Waitz, Ian; Silva, Phillip; Lanni, Thomas; Demerjian, Ken; Kolb, Charles E

    2004-11-15

    In August 2001, the Aerodyne Mobile Laboratory simultaneously measured NO, NO2, and CO2 within 350 m of a taxiway and 550 m of a runway at John F. Kennedy Airport. The meteorological conditions were such that taxi and takeoff plumes from individual aircraft were clearly resolved against background levels. NO and NO2 concentrations were measured with 1 s time resolution using a dual tunable infrared laser differential absorption spectroscopy instrument, utilizing an astigmatic multipass Herriott cell. The CO2 measurements were also obtained at 1 s time resolution using a commercial non-dispersive infrared absorption instrument. Plumes were measured from over 30 individual planes, ranging from turbo props to jumbo jets. NOx emission indices were determined by examining the correlation between NOx (NO + NO2) and CO2 during the plume measurements. Several aircraft tail numbers were unambiguously identified, allowing those specific airframe/engine combinations to be determined. The resulting NOx emission indices from positively identified in-service operating airplanes are compared with the published International Civil Aviation Organization engine certification test database collected on new engines in certification test cells.

  16. Modeling Innovative Power Take-Off Based on Double-Acting Hydraulic Cylinders Array for Wave Energy Conversion

    Directory of Open Access Journals (Sweden)

    Juan Carlos Antolín-Urbaneja

    2015-03-01

    Full Text Available One of the key systems of a Wave Energy Converter for extraction of wave energy is the Power Take-Off (PTO device. This device transforms the mechanical energy of a moving body into electrical energy. This paper describes the model of an innovative PTO based on independently activated double-acting hydraulic cylinders array. The model has been developed using a simulation tool, based on a port-based approach to model hydraulics systems. The components and subsystems used in the model have been parameterized as real components and their values experimentally obtained from an existing prototype. In fact, the model takes into account most of the hydraulic losses of each component. The simulations show the flexibility to apply different restraining torques to the input movement depending on the geometrical configuration and the hydraulic cylinders on duty, easily modified by a control law. The combination of these two actions allows suitable flexibility to adapt the device to different sea states whilst optimizing the energy extraction. The model has been validated using a real test bench showing good correlations between simulation and experimental tests.

  17. A Comparison of Jump Height, Takeoff Velocities, and Blocking Coverage in the Swing and Traditional Volleyball Blocking Techniques

    Directory of Open Access Journals (Sweden)

    Travis Ficklin

    2014-03-01

    Full Text Available The purpose of this study was to compare traditional and swing blocking techniques on center of mass (COM projectile motion and effective blocking area in nine healthy Division I female volleyball players. Two high-definition (1080 p video cameras (60 Hz were used to collect two-dimensional variables from two separate views. One was placed perpendicular to the plane of the net and the other was directed along the top of the net, and were used to estimate COM locations and blocking area in a plane parallel to the net and hand penetration through the plane of the net respectively. Video of both the traditional and swing techniques were digitized and kinematic variables were calculated. Paired samples t-tests indicated that the swing technique resulted in greater (p < 0.05 vertical and horizontal takeoff velocities (vy and vx, jump height (H, duration of the block (tBLOCK, blocking coverage during the block (C as well as hand penetration above and through the net’s plane (YPEN, ZPEN. The traditional technique had significantly greater approach time (tAPP. The results of this study suggest that the swing technique results in both greater jump height and effective blocking area. However, the shorter tAPP that occurs with swing is associated with longer times in the air during the block which may reduce the ability of the athlete to make adjustments to attacks designed to misdirect the defense.

  18. Utilization of BIM for automation of quantity takeoffs and cost estimation in transport infrastructure construction projects in the Czech Republic

    Science.gov (United States)

    Vitásek, Stanislav; Matějka, Petr

    2017-09-01

    The article deals with problematic parts of automated processing of quantity takeoff (QTO) from data generated in BIM model. It focuses on models of road constructions, and uses volumes and dimensions of excavation work to create an estimate of construction costs. The article uses a case study and explorative methods to discuss possibilities and problems of data transfer from a model to a price system of construction production when such transfer is used for price estimates of construction works. Current QTOs and price tenders are made with 2D documents. This process is becoming obsolete because more modern tools can be used. The BIM phenomenon enables partial automation in processing volumes and dimensions of construction units and matching the data to units in a given price scheme. Therefore price of construction can be estimated and structured without lengthy and often imprecise manual calculations. The use of BIM for QTO is highly dependent on local market budgeting systems, therefore proper push/pull strategy is required. It also requires proper requirements specification, compatible pricing database and software.

  19. Partition Model-Based 99mTc-MAA SPECT/CT Predictive Dosimetry Compared with 90Y TOF PET/CT Posttreatment Dosimetry in Radioembolization of Hepatocellular Carcinoma: A Quantitative Agreement Comparison.

    Science.gov (United States)

    Gnesin, Silvano; Canetti, Laurent; Adib, Salim; Cherbuin, Nicolas; Silva Monteiro, Marina; Bize, Pierre; Denys, Alban; Prior, John O; Baechler, Sebastien; Boubaker, Ariane

    2016-11-01

    (90)Y-microsphere selective internal radiation therapy (SIRT) is a valuable treatment in unresectable hepatocellular carcinoma (HCC). Partition-model predictive dosimetry relies on differential tumor-to-nontumor perfusion evaluated on pretreatment (99m)Tc-macroaggregated albumin (MAA) SPECT/CT. The aim of this study was to evaluate agreement between the predictive dosimetry of (99m)Tc-MAA SPECT/CT and posttreatment dosimetry based on (90)Y time-of-flight (TOF) PET/CT. We compared the (99m)Tc-MAA SPECT/CT results for 27 treatment sessions (25 HCC patients, 41 tumors) with (90)Y SIRT (7 glass spheres, 20 resin spheres) and the posttreatment (90)Y TOF PET/CT results. Three-dimensional voxelized dose maps were computed from the (99m)Tc-MAA SPECT/CT and (90)Y TOF PET/CT data. Mean absorbed dose ([Formula: see text]) was evaluated to compute the predicted-to-actual dose ratio ([Formula: see text]) in tumor volumes (TVs) and nontumor volumes (NTVs) for glass and resin spheres. The Lin concordance ([Formula: see text]) was used to measure accuracy ([Formula: see text]) and precision (ρ). Administered activity ranged from 0.8 to 1.9 GBq for glass spheres and from 0.6 to 3.4 GBq for resin spheres, and the respective TVs ranged from 2 to 125 mL and from 6 to 1,828 mL. The mean dose [Formula: see text] was 240 Gy for glass and 122 Gy for resin in TVs and 72 Gy for glass and 47 Gy for resin in NTVs. [Formula: see text] was 1.46 ± 0.58 (0.65-2.53) for glass and 1.16 ± 0.41 (0.54-2.54) for resin, and the respective values for [Formula: see text] were 0.88 ± 0.15 (0.56-1.00) and 0.86 ± 0.2 (0.58-1.35). DR variability was substantially lower in NTVs than in TVs. The Lin concordance between [Formula: see text] and [Formula: see text] (resin) was significantly better for tumors larger than 150 mL than for tumors 150 mL or smaller ([Formula: see text] = 0.93 and [Formula: see text] = 0.95 vs. [Formula: see text] = 0.57 and [Formula: see text] = 0.93; P < 0.05). In (90)Y

  20. Semi-quantitative analysis of post-transarterial radioembolization {sup 90}Y Microsphere position emission tomography combined with computed tomography (PET/CT) images in advance liver malignancy: Comparison with {sup 99m}Tc macroaggregated albumin (MAA) single photon emission computed tomography (SPECT)

    Energy Technology Data Exchange (ETDEWEB)

    Rhee, Seung Hong; Kim, Sung Eun; Cho, Jae Hyuk; Park, Ju Kyung; Kim, Yun Hwan; Choe, Jae Gol [Korea University Anam Hospital, Seoul (Korea, Republic of); Eo, Jae Seon; Park, So Yeon; Lee, Eun Sub [Dept. of Nuclear Medicine, Korea University Guro Hospital, Seoul (Korea, Republic of)

    2016-03-15

    The purpose of this study is to evaluate the correlation between pretreatment planning technetium-99m ({sup 99}mTc) macroaggregated albumin (MAA) SPECT images and posttreatment transarterial radioembolization (TARE) yttirum-90 ({sup 90}Y) PET/CT images by comparing the ratios of tumor-to-normal liver counts. Fifty-two patients with advanced hepatic malignancy who underwent {sup 90}Y microsphere radioembolization from January 2010 to December 2012 were retrospectively reviewed. Patients had undergone {sup 99}mTc MAA intraarterial injection SPECT for a pretreatment evaluation of microsphere distribution and therapy planning. After the administration of {sup 90}Y microspheres, the patients underwent posttreatment {sup 90}Y PET/CT within 24 h. For semiquantitative analysis, the tumor-to-normal uptake ratios in {sup 90}Y PET/CT (TNR-yp) and {sup 99}mTc MAA SPECT (TNR-ms) as well as the tumor volumes measured in angiographic CT were obtained and analyzed. The relationship of TNR-yp and TNR-ms was evaluated by Spearman's rank correlation and Wilcoxon's matched pairs test. In a total of 79 lesions of 52 patients, the distribution of microspheres was well demonstrated in both the SPECT and PET/CT images. A good correlation was observed of between TNR-ms and TNR-yp (rho value = 0.648, p < 0.001). The TNR-yp (median 2.78, interquartile range 2.43) tend to show significantly higher values than TNR-ms (median 2.49, interquartile range of 1.55) (p = 0.012). The TNR-yp showed weak correlation with tumor volume (rho = 0.230, p = 0.041). The 99mTc MAA SPECT showed a good correlation with {sup 90}Y PET/CT in TNR values, suggesting that {sup 99}mTc MAA can be used as an adequate pretreatment evaluation method. However, the {sup 99}mTc MAA SPECT image consistently shows lower TNR values compared to 90Y PET/CT, which means the possibility of underestimation of tumorous uptake in the partition dosimetry model using {sup 99}mTc MAA SPECT. Considering that

  1. First-round design of the flight scenario for Chang'e-2's extended mission: takeoff from lunar orbit

    Science.gov (United States)

    Gao, Yang; Li, Heng-Nian; He, Sheng-Mao

    2012-10-01

    Chang'e-2, Chinese second lunar probe, was inserted into a 100 km altitude low lunar orbit on October 9th, 2010, its purpose is to continuously photograph the lunar surface and possibly chosen landing sites for future lunar missions. The probe will still carry considerable amount of propellant after completing all prescribed tasks in about six months. After the successful launch of Chang'e-2, we began designing the probe's subsequent flight scenario, considering a total impulse of 1 100 m/s for takeoff from low lunar orbit and a maximum 3×106 km distance for Earth-probe telecommunication. Our first-round effort proposed a preliminary flight scenario that involves consecutive arrivals at the halo orbits around the Earth-Moon L1/L2 and Sun-Earth L1/L2 points, near-Earth asteroid flyby, Earth return, and lunar impact. The designed solution of Chang'e-2's subsequent flight scenario is a multi-segment flight trajectory that serves as a reference for making the final decision on Chang'e-2's extended mission, which is a flight to the Sun-Earth L2 point, and a possible scheme of lunar impact via Earth flyby after remaining at the Sun-Earth L2 point was also presented. The proposed flight trajectory, which possesses acceptable solution accuracy for mission analysis, is a novel design that effectively exploits the invariant manifolds in the circular restricted three-body problem and the patched-manifold-conic method.

  2. Study of belly-flaps to enhance lift and pitching moment coefficient of a Blended-Wing-Body airplane in landing and takeoff configuration

    Science.gov (United States)

    Staelens, Yann Daniel

    During the first century of flight few major changes have been made to the configuration of subsonic airplanes. A distinct fuselage with wings, a tail, engines and a landing gear persists as the dominant arrangement. During WWII some companies developed tailless all-wing airplanes. However the concept failed to advance till the late 80's when the B-2, the only flying wing to enter production to date, illustrated its benefits at least for a stealth platform. The advent of the Blended-Wing-Body (BWB) addresses the historical shortcomings of all-wing designs, specifically poor volume utility and excess wetted area as a result. The BWB is now poised to become the new standard for large subsonic airplanes. Major aerospace companies are studying the concept for next generation of passenger airplanes. But there are still challenges. One is the BWB's short control lever-arm pitch. This affects rotation and go-around performances. This study presents a possible solution by using a novel type of control surface, a belly-flap, on the under side of the wing to enhance its lift and pitching moment coefficient during landing, go-around and takeoff. Increases of up to 30% in lift-off CL and 8% in positive pitching moment have been achieved during wind tunnel tests on a generic BWB-model with a belly-flap. These aerodynamic improvements when used in a mathematical simulation of landing, go-around and takeoff procedure were showing reduction in landing-field-length by up to 22%, in takeoff-field-length by up to 8% and in loss in altitude between initiation of rotation and actual rotation during go-around by up to 21.5%.

  3. Application of the concept of dynamic trim control and nonlinear system inverses to automatic control of a vertical attitude takeoff and landing aircraft

    Science.gov (United States)

    Smith, G. A.; Meyer, G.

    1981-01-01

    A full envelope automatic flight control system based on nonlinear inverse systems concepts has been applied to a vertical attitude takeoff and landing (VATOL) fighter aircraft. A new method for using an airborne digital aircraft model to perform the inversion of a nonlinear aircraft model is presented together with the results of a simulation study of the nonlinear inverse system concept for the vertical-attitude hover mode. The system response to maneuver commands in the vertical attitude was found to be excellent; and recovery from large initial offsets and large disturbances was found to be very satisfactory.

  4. Application of the concept of dynamic trim control and nonlinear system inverses to automatic control of a vertical attitude takeoff and landing aircraft

    Science.gov (United States)

    Smith, G. A.; Meyer, G.

    1981-01-01

    A full envelope automatic flight control system based on nonlinear inverse systems concepts has been applied to a vertical attitude takeoff and landing (VATOL) fighter aircraft. A new method for using an airborne digital aircraft model to perform the inversion of a nonlinear aircraft model is presented together with the results of a simulation study of the nonlinear inverse system concept for the vertical-attitude hover mode. The system response to maneuver commands in the vertical attitude was found to be excellent; and recovery from large initial offsets and large disturbances was found to be very satisfactory.

  5. Balancing Power Absorption and Structural Loading for a Novel Fixed-Bottom Wave Energy Converter with Nonideal Power Take-Off in Regular Waves: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Tom, Nathan M [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Yu, Yi-Hsiang [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Wright, Alan D [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-06-08

    In this work, the net power delivered to the grid from a nonideal power take-off (PTO) is introduced followed by a review of the pseudo-spectral control theory. A power-to-load ratio, used to evaluate the pseudo-spectral controller performance, is discussed, and the results obtained from optimizing a multiterm objective function are compared against results obtained from maximizing the net output power to the grid. Simulation results are then presented for four different oscillating wave energy converter geometries to highlight the potential of combing both geometry and PTO control to maximize power while minimizing loads.

  6. Characteristics of the Takeoff Performance Variations of B737-800 Airplane with the Flap Deflection%波音737-800飞机起飞性能随襟翼放出量的变化特点

    Institute of Scientific and Technical Information of China (English)

    陈昌荣

    2014-01-01

    波音737飞机与其他民用机型的一个不同之处是前缘缝翼在起飞时可以使用开缝状态。分析了波音737-800飞机下列四个起飞性能参数与襟翼放出量的关系:场地长度限制的最大起飞重量;爬升梯度限制的最大起飞重量;障碍物限制的最大起飞重量;起飞决断速度。结果显示这四个参数在襟翼放出量为10时出现异常,原因是前缘缝翼状态发生了变化。在襟翼放出量由5增大到10的过程中,前缘缝翼由不开缝的放出状态变成开缝的完全放出状态,降低了升力系数。%One characteristic of B737 airplane is that the slotted extension state of the leading edge slats can be ap-plied in the takeoff, while other types of airplanes do not apply this state in the takeoff. In this paper, the relation-ships between the flap deflection and the following four parameters of the takeoff were analyzed:the maximum takeoff weight limited by field length, the maximum takeoff weight limited by climb gradient, the maximum takeoff weight limited by obstacles and the takeoff decision speed. The results show that these four parameters of takeoff are abnor-mal when the flap deflection is 10. The reason is that the extension state of the leading edge slats is changed. During the increase of the flap deflection from 5 to 10, the extension state of the leading edge slats is changed from the sealed extension state to the slotted extension state, and such a change of state causes a decrease of the lift coefficient.

  7. The course correction implementation of the inertial navigation system based on the information from the aircraft satellite navigation system before take-off

    Science.gov (United States)

    Markelov, V.; Shukalov, A.; Zharinov, I.; Kostishin, M.; Kniga, I.

    2016-04-01

    The use of the correction course option before aircraft take-off after inertial navigation system (INS) inaccurate alignment based on the platform attitude-and-heading reference system in azimuth is considered in the paper. A course correction is performed based on the track angle defined by the information received from the satellite navigation system (SNS). The course correction includes a calculated track error definition during ground taxiing along straight sections before take-off with its input in the onboard digital computational system like amendment for using in the current flight. The track error calculation is performed by the statistical evaluation of the track angle comparison defined by the SNS information with the current course measured by INS for a given number of measurements on the realizable time interval. The course correction testing results and recommendation application are given in the paper. The course correction based on the information from SNS can be used for improving accuracy characteristics for determining an aircraft path after making accelerated INS preparation concerning inaccurate initial azimuth alignment.

  8. Wing Tip Drag Reduction at Nominal Take-Off Mach Number: An Approach to Local Active Flow Control with a Highly Robust Actuator System

    Directory of Open Access Journals (Sweden)

    Matthias Bauer

    2016-10-01

    Full Text Available This paper discusses wind tunnel test results aimed at advancing active flow control technology to increase the aerodynamic efficiency of an aircraft during take-off. A model of the outer section of a representative civil airliner wing was equipped with two-stage fluidic actuators between the slat edge and wing tip, where mechanical high-lift devices fail to integrate. The experiments were conducted at a nominal take-off Mach number of M = 0.2. At this incidence velocity, separation on the wing section, accompanied by increased drag, is triggered by the strong slat edge vortex at high angles of attack. On the basis of global force measurements and local static pressure data, the effect of pulsed blowing on the complex flow is evaluated, considering various momentum coefficients and spanwise distributions of the actuation effort. It is shown that through local intensification of forcing, a momentum coefficient of less than c μ = 0.6 % suffices to offset the stall by 2.4°, increase the maximum lift by more than 10% and reduce the drag by 37% compared to the uncontrolled flow.

  9. Estimation of Joint Forces and Moments for the In-Run and Take-Off in Ski Jumping Based on Measurements with Wearable Inertial Sensors

    Directory of Open Access Journals (Sweden)

    Grega Logar

    2015-05-01

    Full Text Available This study uses inertial sensors to measure ski jumper kinematics and joint dynamics, which was until now only a part of simulation studies. For subsequent calculation of dynamics in the joints, a link-segment model was developed. The model relies on the recursive Newton–Euler inverse dynamics. This approach allowed the calculation of the ground reaction force at take-off. For the model validation, four ski jumpers from the National Nordic center performed a simulated jump in a laboratory environment on a force platform; in total, 20 jumps were recorded. The results fit well to the reference system, presenting small errors in the mean and standard deviation and small root-mean-square errors. The error is under 12% of the reference value. For field tests, six jumpers participated in the study; in total, 28 jumps were recorded. All of the measured forces and moments were within the range of prior simulated studies. The proposed system was able to indirectly provide the values of forces and moments in the joints of the ski-jumpers’ body segments, as well as the ground reaction force during the in-run and take-off phases in comparison to the force platform installed on the table. Kinematics assessment and estimation of dynamics parameters can be applied to jumps from any ski jumping hill.

  10. Science and Technology Takeoff and Its Conditions Based on Five Large Economies Experiences%主要国家的科技起飞及其条件

    Institute of Scientific and Technical Information of China (English)

    高建

    2006-01-01

    本文的主要理论贡献是揭示了科技起飞使技术创新从使用技术向改进和创造技术阶段转换过程中的科技加速发展现象。通过分析西方发达国家和新兴工业化国家的科技起飞历史,总结了科技起飞的三个初始条件和技术创新阶段转换的关键因素。%The main theoretical contribution of this paper is to exploit science and technology take-off,which is a phenomenon of accelerated progress of science and technology in the process of tech-nological innovation from the stage of using technology to improving and creating technology.By an-alyzing the history of science and technology takeoff happened in developed countries and emerging industrialized countries,the author summarized three initial conditions for science and technology take-off and found key factors for the stage transition of technological innovation.

  11. 基于可靠性的起飞驾驶误差系数确定方法%Confirmation Method of Aircraft Take-off Drive Error Coefficient Based on Reliability

    Institute of Scientific and Technical Information of China (English)

    宋花玉

    2015-01-01

    Average value method used in the current confirmation method of aircraft take-off drive error coefficient was unsafe .In order to remedy the situation ,the distribution of a certain aircraft take-off drive error coefficient was studied by means of mathematical statistics , and a confirmation method of aircraft take-off drive error coefficient based on reliability was put forward .Two runway lengthes were calculated through the aircraft take-off drive error coefficients which were confirmed by average value method and reliability method respectively .The runway length calculated by average value method can only ensure the safety of take-off with the probability of 50%, while the runway length calculated by reliability method can ensure the safety of take-off with the probability of 90%.Furthermore,The runway length calculated by reliability method is 10%more than that designed by average value method .This indicate that reliabil-ity method is more reasonable than average value method in confirmation of aircraft take-off drive error coefficient .%针对现行起飞驾驶误差系数的平均值确定法偏于不安全的问题,运用数理统计的理论和方法对起飞驾驶误差系数的分布规律进行了研究,提出了基于可靠性的起飞驾驶误差系数确定方法。对某型飞机分别用平均值法和可靠性法确定起飞驾驶误差系数进行跑道长度设计,平均值法设计的跑道长度只能以50%的概率保证飞机安全起飞,可靠性法设计的跑道长度却能以90%的概率保证飞机安全起飞,同时可靠性法设计的跑道长度只比平均值法设计的跑道长度多10%,这表明可靠性法确定起飞驾驶误差系数比平均值法更科学合理。

  12. Intrahepatic arterial {sup 99M}Technetium ({sup 99M}Tc) macroaggregated albumin (MAA) scan prior to selective internal radiation therapy (SIRT) with {sup 90}Yttrium (90Y) microspheres for liver tumours

    Energy Technology Data Exchange (ETDEWEB)

    Langan, P.; Alwan, M.H.; Stubbs, R.S. [Wakefield Hospital, Wellington (New Zealand). Department of Radiology and Gastroenterology

    1998-06-01

    Full text: {sup 90}Y-microspheres is a regional treatment modality that is used for patients with inoperable primary or secondary liver tumours. Success of treatment depends on the increased uptake and retention of the {sup 90}Y by the tumour relative to normal liver, and the absence of significant extrahepatic shunting. Between February and November 1997, 32 patients were treated with SIRT at Wakefield Gastroenterology Centre. A group of these patients received subsequent hepatic arterial infusion chemotherapy (HAI) using 5-Fluorouracil (5FU). {sup 99m}Tc-MAA in a median dose of 135 MBq (3.6 mCi) [range: 120-150 MBq, or 3.4- 4.1 mCi] with >90% of the particles 10 to 90 {mu}m in size and none greater than 150 {mu}n was injected through a subcutaneously implanted port inserted at laparotomy in the gastroduodenal artery which led to the common hepatic artery (26 patients), or through a transfemoral catheter positioned in the hepatic artery (6 patients). Scintigraphic images of the liver, lungs and gastroduodenal regions were taken with a GE Statcam 4000i gamma camera. The total count rate was computed from the digitised image, and the percentages of activity were calculated as the ratio of lung counts-to-total counts. A liver/lung shunt of < 15% was a prerequisite for treatment with SIRT. There were 18 males and 14 females with a median age of 60.5 years (range: 29 to 76). Twenty eight patients had secondary tumours (23 colorectal, 5 others) and 4 patients had hepatocellular cardnoma (HCC). The median liver/lung shunt was 0.6% (range: 0% to 9.3%). The median shunt for HCC was 0.7% (range: 0% to 2%) and for the secondary tumours 0.6% (<0.1% to 9.3%). No significant shunt was detected in the gastroduodenal region. Assessment of lung shunting of {sup 99m}Tc-MAA scan is useful for excluding patients who may be at risk of pulmonary irradiation, or significant systemic toxicity after regional chemotherapy

  13. Ground Stereo Vision-Based Navigation for Autonomous Take-off and Landing of UAVs: A Chan-Vese Model Approach

    Directory of Open Access Journals (Sweden)

    Dengqing Tang

    2016-04-01

    Full Text Available This article aims at flying target detection and localization of a fixed-wing unmanned aerial vehicle (UAV autonomous take-off and landing within Global Navigation Satellite System (GNSS-denied environments. A Chan-Vese model–based approach is proposed and developed for ground stereo vision detection. Extended Kalman Filter (EKF is fused into state estimation to reduce the localization inaccuracy caused by measurement errors of object detection and Pan-Tilt unit (PTU attitudes. Furthermore, the region-of-interest (ROI setting up is conducted to improve the real-time capability. The present work contributes to real-time, accurate and robust features, compared with our previous works. Both offline and online experimental results validate the effectiveness and better performances of the proposed method against the traditional triangulation-based localization algorithm.

  14. Relationship between preoperative pulmonary blood flow measured by lung perfusion scanning with /sup 99m/Tc-MAA and values of PaO2 during one-lung anaesthesia

    Energy Technology Data Exchange (ETDEWEB)

    Nomoto, Yukiko

    1985-04-01

    Occassionally one-lung anaesthesia may cause severe hypoxia. The author analyzed the relationship between preoperative pulmonary blood flow by means of lung perfusion scanning with /sup 99m/Tc-MAA and values of PaO2 during one-lung anaesthesia in 30 adult patients undergoing elective thoracotomy. The ratio of perfusion partition between the dependent lung and the non-dependent one was 67.5 +- 3.6 percent (mean +- SE). Mean value of PaO2 of 30 minutes after one lung ventilation (FlO2 0.99) was 216.7 +- 21.5 mmHg. These values of PaO2 during one-lung anaesthesia were well correlated with the preoperative lung perfusion partition ratios (el=0.893). Meanwhile, in eight cases whose lung perfusion ratios of the dependent lung were less than 50 percent, marked hypoxemia with mean values of PaO2 of 69.8 +- 3.5 mmHg was observed. These results indicated that preoperative evaluation of lung perfusion could predict the values of PaO2 during one-lung anaesthesia. (author).

  15. Synthesis and Performances of Acrylamide-2-Acrylamido-2-Methylpropanesulfonic Acid-Methacrylic Acid-Diallyl Dimethyl Ammonium Chloride Quadripolymer%AM/AMPS/MAA/DADMAC四元共聚物的合成与性能

    Institute of Scientific and Technical Information of China (English)

    王中华

    2001-01-01

    Acrylamide-2-acrylamido-2-methylpropanesulfonic acid-methacrylic acid-diallyl dimethyl ammonium chloride quadripolymer as drilling-fluid additive was synthesized by redox initation. The mud performances of the quadripolymer was evaluated in the laboratory. The results showed that acrylamide-2-acrylamido-2-methylpropanesulfonic acid-methacrylic acid-diallyl dimethyl ammonium chloride quadripolymer has very good heat resistance,depressing filter loss, salt tolerance, and protection against collapse.%采用氧化-还原引发体系合成丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸/甲基丙烯酸/二烯丙基二甲基氯化铵四元共聚物作为钻井液处理剂。初步评价了此四元共聚物的泥浆性能,结果表明,AM/AMPS/MAA/DADMAC四元共聚物具有较好的降滤失和耐温性能,较强的抗盐能力,及较好的防塌效果。

  16. 运输类飞机弹射起飞动力学特性分析%Analysis of dynamical characteristics for transport catapult-assisted take-off

    Institute of Scientific and Technical Information of China (English)

    杨生民; 刘超; 刘智汉

    2011-01-01

    根据运输类飞机弹射起飞特点,建立了运输类飞机、舰船和风场等数学模型,着重介绍了能够反映飞机和舰船间多体动力学关系的起落架模型、弹射器和舰船运动模型的建模方法;开展了运输类飞机弹射起飞动力学特性研究,重点分析了起飞重量、升降舵预置偏度、甲板运动、前起落架突伸等因素对弹射起飞的影响,以期为运输类舰载机的设计和飞行试验提供技术支持.%Based on dynamical characteristics of transport catapult-assisted take-off, several models of carrier-type transports, and their near zones between a carrier and wind fields are designed in this paper. It mainly introduces the modeling method of different models for landing gears, a catapult and carrier motions to be able to represent the multi-body dynamical relevance between aircraft and carrier, and discusses dynamical characteristics for the transport catapult-assisted take-off. It is focus on analyzing the effects of various factors, including the transport ' s take-off weight, elevator predefined deflections, deck motions and nose gear sudden extension on the catapult-assisted take-off. The simulation results will give a reference to design and flight test for carrier-type transports.

  17. A Simulator Study of the Effectiveness of a Pilot's Indicator which Combined Angle of Attack and Rate of Change of Total Pressure as Applied to the Take-Off Rotation and Climbout of a Supersonic Transport

    Science.gov (United States)

    Hall, Albert W.; Harris, Jack E.

    1961-01-01

    A simulator study has been made to determine the effectiveness of a single instrument presentation as an aid to the pilot in controlling both rotation and climbout path in take-off. The instrument was basically an angle-of-attack indicator, biased with a total-pressure-rate input as a means of suppressing the phugoid oscillation. Linearized six-degree-of-freedom equations of motion were utilized in simulating a hypothetical supersonic transport as the test vehicle. Each of several experienced pilots performed a number of simulated take-offs, using conventional flight instruments and either an angle-of-attack instrument or the combined angle-of-attack and total-pressure-rate instrument. The pilots were able to rotate the airplane, with satisfactory precision, to the 15 deg. angle of attack required for lift-off when using either an angle-of-attack instrument or the instrument which combined total-pressure-rate with angle of attack. At least 4 to 6 second-S appeared to be required for rotation to prevent overshoot, particularly with the latter instrument. The flight paths resulting from take-offs with simulated engine failures were relatively smooth and repeatable within a reasonably narrow band when the combined angle-of-attack and total-pressure-rate instrument presentation was used. Some of the flight paths resulting from take-offs with the same engine-failure conditions were very oscillatory when conventional instruments and an angle-of-attack instrument were used. The pilots considered the combined angle-of-attack and total- pressure-rate instrument a very effective aid. Even though they could, with sufficient practice, perform satisfactory climbouts after simulated engine failure by monitoring the conventional instruments and making correction based on their readings, it was much easier to maintain a smooth flight path with the single combined angle-of-attack and total-pressure-rate instrument.

  18. Balancing the Power-to-Load Ratio for a Novel Variable Geometry Wave Energy Converter with Nonideal Power Take-Off in Regular Waves: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Tom, Nathan M [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Yu, Yi-Hsiang [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Wright, Alan D [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

    2017-09-28

    This work attempts to balance power absorption against structural loading for a novel variable geometry wave energy converter. The variable geometry consists of four identical flaps that will be opened in ascending order starting with the flap closest to the seafloor and moving to the free surface. The influence of a pitch motion constraint on power absorption when utilizing a nonideal power take-off (PTO) is examined and found to reduce the losses associated with bidirectional energy flow. The power-to-load ratio is evaluated using pseudo-spectral control to determine the optimum PTO torque based on a multiterm objective function. The pseudo-spectral optimal control problem is extended to include load metrics in the objective function, which may now consist of competing terms. Separate penalty weights are attached to the surge-foundation force and PTO control torque to tune the optimizer performance to emphasize either power absorption or load shedding. PTO efficiency is not included in the objective function, but the penalty weights are utilized to limit the force and torque amplitudes, thereby reducing losses associated with bidirectional energy flow. Results from pseudo-spectral control demonstrate that shedding a portion of the available wave energy can provide greater reductions in structural loads and reactive power.

  19. Noise of a model counterrotation propeller with reduced aft rotor diameter at simulated takeoff/approach conditions (F7/A3)

    Science.gov (United States)

    Woodward, Richard P.; Gordon, Eliott B.

    1988-01-01

    A model high-speed advanced counterrotation propeller, F7/A3, was tested in the NASA Lewis Research Center 9 by 15 foot Anechoic Wind Tunnel at simulated takeoff/approach conditions of 0.2 Mach number. Acoustic measurements were taken with an axially translating microphone probe, and with a polar microphone probe which was fixed to the propeller nacelle and could take both sideline and circumferential acoustic surveys. Aerodynamic measurements were also made to establish propeller operating conditions. The propeller was run at two setting angles (front angle/rear angle) of 36.4/43.5 and 41.1/46.4 degrees, forward rotor tip speeds from 165 to 259 m/sec, rotor spacings from 8.48 to 14.99 cm based on pitch change axis separation, and angles of attack to 16 degrees. The aft rotor diameter was 85 percent of the forward rotor diameter to reduce tip vortex-aft rotor interaction as a major interaction noise source. Results are compared with equal diameter F7/A7 data which was previously obtained under similar operating conditions. The aft rotor-alone tone was 7 dB lower for the reduced diameter aft rotor, due to reduced tip speed at constant rpm. Interaction tone levels for the F7/A3 propeller were higher at minimum row spacing and lower at maximum spacing.

  20. Noise of a model counterrotation propeller with reduced aft rotor diameter at simulated takeoff/approach conditions (F7/A3)

    Science.gov (United States)

    Woodward, Richard P.; Gordon, Eliott B.

    1988-01-01

    A model high-speed advanced counterrotation propeller, F7/A3, was tested in the NASA Lewis Research Center 9 by 15 foot Anechoic Wind Tunnel at simulated takeoff/approach conditions of 0.2 Mach number. Acoustic measurements were taken with an axially translating microphone probe, and with a polar microphone probe which was fixed to the propeller nacelle and could take both sideline and circumferential acoustic surveys. Aerodynamic measurements were also made to establish propeller operating conditions. The propeller was run at two setting angles (front angle/rear angle) of 36.4/43.5 and 41.1/46.4 degrees, forward rotor tip speeds from 165 to 259 m/sec, rotor spacings from 8.48 to 14.99 cm based on pitch change axis separation, and angles of attack to 16 degrees. The aft rotor diameter was 85 percent of the forward rotor diameter to reduce tip vortex-aft rotor interaction as a major interaction noise source. Results are compared with equal diameter F7/A7 data which was previously obtained under similar operating conditions. The aft rotor-alone tone was 7 dB lower for the reduced diameter aft rotor, due to reduced tip speed at constant rpm. Interaction tone levels for the F7/A3 propeller were higher at minimum row spacing and lower at maximum spacing.

  1. 应用电磁弹射器的舰载机起飞性能分析%Performance Analysis of Catapult Take-Off Process of Carrier-Based Aircraft Using Electromagnetic Aircraft Launch System

    Institute of Scientific and Technical Information of China (English)

    李静; 左斌; 路翠华

    2012-01-01

    针对应用电磁弹射器的舰载机弹射起飞过程,综合考虑了电磁弹射器的推力、舰载机前起落架突伸力和载舰的运动,建立了舰载机弹射起飞的数学模型,并据此,分析了上述各种因素对舰载机弹射起飞安全性的影响,计算得到在满足舰载机弹射起飞安全准则的条件下,各种起飞因素应该满足的适应范围。研究分析表明:在风浪较大的恶劣天气条件下,通过适当地增加电磁弹射器的电磁推力和前起落架的突伸力,可以有效抑制舰载机的航迹下沉现象,确保舰载机的安全起飞过程。%Taking into consideration the thrust force of electromagnetic launch system,the nose gear fast-extension force and the ship motion process,a mathematical model of a carrier-based aircraft using electromagnetic launch system during the catapult takeoff process was built.Based on the proposed model,the influence of the above factors on catapult take-off safety was analyzed.Moreover,the scales of several take-off factors which accord with the catapult take-off safety were computed.The results indicated that properly increasing the thrust force of electromagnetic launch system and enhancing the nose gear fast-extension force could help to decrease the flight path sinkage and guarantee the catapult take-off safety of the carrier-based aircraft under the condition of atrocious weather.

  2. Venestus - kas tundmata maa? / Mart Laar

    Index Scriptorium Estoniae

    Laar, Mart, 1960-

    2010-01-01

    Arvustus: Vene impeerium ja Baltikum : venestus, rahvuslus ja moderniseerimine 19. sajandi teisel poolel ja 20. sajandi alguses. II / koostanud Tõnu Tannberg ja Bradley Woodworth. Tartu : Eesti Ajalooarhiiv, 2010

  3. Tagasi kahe jalaga maa peale / Simon Long

    Index Scriptorium Estoniae

    Long, Simon

    2006-01-01

    Ootused, et India kerkib maailmas silmapaistvaks majanduslikuks ja poliitiliseks jõuks, on alati läinud vastuollu riigis tegelikult toimuvaga. Vt. samas: Tom Felix Joehnk. Suur India müür; Paneme lambid põlema

  4. Maffia, hullus ja Sannikovi maa / Vaapo Vaher

    Index Scriptorium Estoniae

    Vaher, Vaapo, 1945-

    2011-01-01

    Arvustus: Roberts, Gregory David. Shantaram. 1.-2. raamat / tõlkinud Riina Jesmin. Tallinn : Varrak, 2011 ; Akutagawa, Ryūnosuke. Mandariinid tihnikus. Tallinn : Varrak, 2011 ; Põder, Rein. Kauge. Tallinn : Eesti Raamat, 2011

  5. Tagasi kahe jalaga maa peale / Simon Long

    Index Scriptorium Estoniae

    Long, Simon

    2006-01-01

    Ootused, et India kerkib maailmas silmapaistvaks majanduslikuks ja poliitiliseks jõuks, on alati läinud vastuollu riigis tegelikult toimuvaga. Vt. samas: Tom Felix Joehnk. Suur India müür; Paneme lambid põlema

  6. Maffia, hullus ja Sannikovi maa / Vaapo Vaher

    Index Scriptorium Estoniae

    Vaher, Vaapo, 1945-

    2011-01-01

    Arvustus: Roberts, Gregory David. Shantaram. 1.-2. raamat / tõlkinud Riina Jesmin. Tallinn : Varrak, 2011 ; Akutagawa, Ryūnosuke. Mandariinid tihnikus. Tallinn : Varrak, 2011 ; Põder, Rein. Kauge. Tallinn : Eesti Raamat, 2011

  7. Mohamed - tark mees maa all / Mari Aigro

    Index Scriptorium Estoniae

    Aigro, Mari

    2008-01-01

    Tallinnas Vabaduse väljaku tunnelis idamaiste toodete poodi pidav egiptlane Mohamed Gamal Abdelmeged El Maayergy on Eestis elanud kolm aastat. Lisaks oma äri pidamisele on tal käsil kaks ülikooli : ta õpib Tallinna Ülikoolis antropoloogiat ja Tallinna Tehnikaülikoolis ärijuhtimist

  8. Mohamed - tark mees maa all / Mari Aigro

    Index Scriptorium Estoniae

    Aigro, Mari

    2008-01-01

    Tallinnas Vabaduse väljaku tunnelis idamaiste toodete poodi pidav egiptlane Mohamed Gamal Abdelmeged El Maayergy on Eestis elanud kolm aastat. Lisaks oma äri pidamisele on tal käsil kaks ülikooli : ta õpib Tallinna Ülikoolis antropoloogiat ja Tallinna Tehnikaülikoolis ärijuhtimist

  9. Sõjast väsinud maa

    Index Scriptorium Estoniae

    2004-01-01

    Oma kogemustest Bagrami lennubaasis Afganistanis räägivad Eesti Päästemeeskonna demineerimismissiooni liikmed Jaanus Vahersalu, Jaan Ohtra, Kaukko Kiisk, Toomas Sims, Tõnu Mägi, Raido Taalmann, Indrek Samm, Kalvar Tammine, Kaido Kaurit, Rauno Saareleht ja Pille Volmerson

  10. Egiptus - seni vaid lubaduste maa / Heiki Suurkask

    Index Scriptorium Estoniae

    Suurkask, Heiki, 1972-

    2011-01-01

    Egiptuse president Hosni Mubarak on tagasi astunud ja võim on nüüd kõrgeima sõjanõukogu juhi Muhammad Hussain Tantawi käes, kes on lasknud juba rahva vastu ka füüsilist jõudu kasutada. Senisele võimueliidile on kehtestatud riigist lahkumise keeld, parlament on laiali saadetud ja põhiseaduse kehtivus on peatatud. Edaspidistest arenguvõimalustest ja mulluste parlamendivalimiste tulemustest

  11. Terve Maa uueks loomine / Mark Williams

    Index Scriptorium Estoniae

    Williams, Mark

    2010-01-01

    Rohelise liikumise asutaja Stewart Brandi hinnangutest kliimamuutustele, tuumaenergeetikale jt rohelise mõtteviisiga seotud mõistetele. S. Brandi arvates tuleb kriitiliselt hinnata vasakpoolsete roheliste arusaami ning aru saada, et ökoloogiliste muutuste puhul tuleb muuta ka kindlakskujunenud mõttestampe

  12. P(MMA-BA-MAA)/P(MMA-BA-VP)共聚物复合体系的氢键相互作用%HYDROGEN BONDING INTERACTION BETWEEN POLY(METHYL METHACRYLATE-co-BUTYL ACRYLATE-co-METHACRYLIC ACID) AND POLY(METHYL METHACRYLATE-co-BUTYL ACRYLATE-co-N-VINYL-2-PYRROLIDONE)

    Institute of Scientific and Technical Information of China (English)

    齐波; 淡宜; 杨玉霞

    2001-01-01

    Two copolymers, poly(methyl methacrylate-co-butyl acrylate-co-methacrylic acid) and poly(methyl methacrylate-co-butyl acrylate-co-N-vinyl-2-pyrrolidone), with complementary chemical structure were synthesized through emulsion polymerization. Compositions of the copolymers were determined through 1H-NMR. Hydrogen bonding interaction between these two copolymers and properties of the copolymers complex were studied by means of FT-IR, DSC, surface energy, and tensile measurements. The results show that, there exists hydrogenbonding interactions in the copolyemrs complex, and it is the interactions that results in decreasing of surface energy and promoting of tensility of copolymers complex.%通过乳液共聚合分别合成了两种具有互补结构的共聚物乳液:聚(甲基丙烯酸甲酯-丙烯酸丁酯-甲基丙烯酸)[P(MMA-BA-MAA)]和聚(甲基丙烯酸甲酯-丙烯酸丁酯-乙烯基吡咯烷酮)[P(MMA-BA-VP)]。通过1H-NMR测定,研究了共聚物组成与单体投料组成的关系;通过FR-IR、DSC、表面能及力学性能测试,研究了P(MMA-BA-MAA)/P(MMA-BA-VP)共聚物复合体系氢键相互作用及其对聚合物性能的影响。结果表明,P(MMA-BA-MAA)/P(MMA-BA-VP)共聚物复合体系存在氢键相互作用,氢键相互作用导致复合体系表面能降低、拉伸强度提高。

  13. First-round design of the flight scenario for Chang'e-2's extended mission:takeoff from lunar orbit

    Institute of Scientific and Technical Information of China (English)

    Yang Gao; Heng-Nian Li; Sheng-Mao He

    2012-01-01

    Chang'e-2,Chinese second lunar probe,was inserted into a 100 km altitude low lunar orbit on October 9th,2010.its purpose is to continuously photograph the lunar surface and possibly chosen landing sites for future lunar missions.The probe will still carry considerable amount of propellant after completing all prescribed tasks in about six months.After the successful launch of Chang'e-2,we began designing the probe's subsequent flight scenario,considering a total impulse of 1100 m/s for takeoff from low lunar orbit and a maximum 3× 106 km distance for Earth-probe telecommunication.Our first-round effort proposed a preliminary flight scenario that involves consecutive arrivals at the halo orbits around the Earth-Moon L1/L2 and Sun-Earth L1/L2 points,near-Earth asteroid flyby,Earth return,and lunar impact.The designed solution of Chang'e-2's subsequent flight scenario is a multi-segment flight trajectory that serves as a reference for making the final decision on Chang'e-2's extended mission,which is a flight to the Sun-Earth L2 point,and a possible scheme of lunar impact via Earth flyby after remaining at the Sun-Earth L2 point was also presented.The proposed flight trajectory,which possesses acceptable solution accuracy for mission analysis,is a novel design that effectively exploits the invariant manifolds in the circular restricted three-body problem and the patched-manifold-conic method.

  14. 基于ArcGIS平台的减噪起飞程序仿真研究%Simulation Research of Noise Abatement Take-off Climb Procedure Based on ArcGIS

    Institute of Scientific and Technical Information of China (English)

    刘雨佳; 朱代武; 陈彬

    2015-01-01

    Airport noise problems have become increasingly prominent,it is important to use noise abatement flight procedures to reduce the scope and strength of airport noise exposure.The article took LWECPN as noise index,established Xiamen airport noise prediction calculation model,calculated predictive noise value and drew noise contour line by ArcGIS software,analyzed the impact of takeoff procedures on aircraft noise.Conclusion shows that noise abatement take-off climb procedures have some influence on takeoff noise;the method can overcome the limitations of traditional airport noise curve drawing.%机场噪声问题日渐突出,研究减噪飞行程序减小机场噪声的影响范围与强度显得非常重要。该文以厦门高崎机场为例建立机场噪声预测模型,采用计权等效连续感觉噪声级作为评价指标,使用Java编程完成噪声值计算及大地坐标转换,使用ArcGIS软件结合地理信息绘制噪声等值线,分析不同爬升梯度下减噪起飞程序产生的噪声影响范围。结论表明,该方法可以量化噪声影响范围,克服传统机场噪声曲线绘制方法的局限性。

  15. The Estimated Method of the Takeoff Distance of a WIG on Water%地效飞行器水面起飞滑跑距离估算方法

    Institute of Scientific and Technical Information of China (English)

    许震宇; 成航; 李沙

    2011-01-01

    地效飞行器、水上飞机在水面起飞时,由于受到发动机推力、水动力和空气动力的作用,其运动规律非常复杂。加上阵风、水面状态以及驾驶员的操纵技术等一系列因素,使情况更加复杂化了。本文在基本运动方程中引入了机身浸湿面积与滑行速度成负斜率线性关系的假设,从而简化了起飞距离的计算过程,得到发动机推力与起飞滑行距离之间的关系曲线。本文为地效飞行器、水上飞机的发动机选型或起飞滑跑距离的估算,提供了简便的计算方法。%When Wing in Ground Vehicles (WIG Vehicles), Seaplane take off on water, the law of motion may be very complicated, because of the effect of propeller thrust, hydrodynamic force and the aerodynamic force. The situation may be more complicated, if considering the gust, surf, and the skill of the pilot. The assumption that the wetted area of the fuselage is negative proportional to the velocity is introduced in the kinematical equations. Accordingly, the computation of the takeoff distance is simplified, and the relational graph between the propeller thrust and the takeoff distance can be draw. The simplified method can be used to help selecting the engine model or to evaluate the takeoff distance.

  16. 周进周出式二沉池流态数值模拟%Numerical simulation of flow pattern in a peripheral-feed and peripheral takeoff secondary clarifier

    Institute of Scientific and Technical Information of China (English)

    全荣

    2011-01-01

    In order to study the flow pattern in a peripheral-feed and peripheral takeoff secondary clarifier of Hedong wastewater treatment plant in Xiangtan city, a modified RNG k-ε two-equation model was used for the numerical simulation of the flow patterns in the said kind of secondary clarifier under different reflux ratios with the aid of software FLUENT6.3. The results showed that: short circuit did not exist in the peripheral-feed and peripheral takeoff secondary clarifier of Hedong wastewater treatment plant in Xiangtan city; with the increasing of reflux ratio, volume availability increased gradually. It could be seen that, peripheral-feed and peripheral takeoff secondary clarifier could meet the design requirement for flow pattern, and had high volume availability but poor anti-shock loading capability.%为了研究湘潭市河东污水处理厂周进周出式二沉池的流态,利用改进的RNGk-ε双方程模型,借助FLUENT6.3软件,对不同回流比情况下的周进周出式二沉池流态进行了数值模拟.结果表明:湘潭市河东污水处理厂周进周出式二沉池并不存在短流现象;随着回流比的增大,容积利用率逐渐增大,周进周出式二沉池实际流态基本上能达到设计目的,容积利用率较高但不耐水量冲击.

  17. Take-off and Landing

    Science.gov (United States)

    1975-01-01

    de ddoollage. Cette conception est bases sur les remarques suivantos, conoemart le pilotage aveo lo tableau de bord classique ; a) L’atterrissage...fonction de ses dl&nents d’appr£clation, le commandant de bord peut alors decider de poursuivre I’atterrlssage en pilotage manuel, ft l’aide des...pourrait Itxe un futur tableau d« bord . La parti« principal« de ce tableau de bord , oonpie pour les phases d&sollaga et atterriasage, «at un viseur

  18. Model-as-a-service (MaaS) using the cloud service innovation platform (CSIP)

    Science.gov (United States)

    Cloud infrastructures for modelling activities such as data processing, performing environmental simulations, or conducting model calibrations/optimizations provide a cost effective alternative to traditional high performance computing approaches. Cloud-based modelling examples emerged into the more...

  19. Preparation of Nano-Titanium Dioxide P(MMA-BA)-MAA (Core/Shell) Hybrid Composite Particles%纳米二氧化钛核/聚甲基丙烯酸甲酯-丙烯酸丁酯-甲基丙烯酸壳杂化复合粒子的制备

    Institute of Scientific and Technical Information of China (English)

    张建民; 汪志勇; 孙秀果; 彭政

    2006-01-01

    以阴离子与非离子表面活性剂作为复合表面活性剂,反应过程中控制纳米TiO2乳液的pH值在8~10,采用乳液聚合法制备了以纳米TiO2为核,聚甲基丙烯酸甲酯-丙烯酸丁酯-甲基丙烯酸(P[(MMA-BA)-MAA])为壳的杂化复合粒子.用透光率和亲水亲油实验来检验复合粒子在有机溶剂中的分散性,并借助于TEM,FT-IR表征了复合粒子的形貌和结构.

  20. Flight Test Technology Research on Crosswind Takeoff and Landing of Civil Airplane%民用飞机大侧风起降试飞关键技术研究

    Institute of Scientific and Technical Information of China (English)

    张海妮; 程伟豪; 张强

    2015-01-01

    In China, the critical lfight test technology of crosswind takeoff and landing was ifrst applied to civil airplane according to CCAR-25 when the interrelated lfight test of a civil airplane was carried out. Based on the test, this paper researched and validated a method of evaluating an airplane’s capability of resistance to crosswind, brought out a method of converting an airplane’s capability of resistance to crosswind within the whole weight range of the airplane, and expatiated the critical lfight test technology of the crosswind takeoff and landing lfight test of civil airplane. Those can provide an important reference for other transport category airplane.%某型民用飞机的大侧风起降试飞是我国首次严格按照CCAR25部的要求将相关试飞技术完整运用于民用飞机。结合该飞机的大侧风起降试飞,对飞机理论抗侧风量的预测方法进行了研究和验证,提出了将飞机的理论抗侧风量换算至全重量范围内的方法,并详细阐述了民用飞机大侧风起降试飞过程中的关键试飞技术,可为其他运输类飞机的大侧风起降试飞提供重要的参考。

  1. Kinematical Analysis on the Take-off Technique of Male High Jumpers in the 11th IAAF World Junior Championship%第11届世界青年田径锦标赛男子跳高运动员起跳技术的运动学分析

    Institute of Scientific and Technical Information of China (English)

    石晓峰; 刘生杰; 李建英

    2009-01-01

    对第11届世界青年田径锦标赛男子跳高运动员进行起跳技术的三维运动学分析,结果表明:研究对象最后一步技术与世界优秀运动员的差异性小;H2、成绩和重心最大高度均相对较低;起跳点距离横杆垂直面过近;助跑速度和起跳结束时的身体重心垂直速度低;利用水平速度的能力不够;起跳结束时重心垂直速度与垂直加速距离、摆动腿摆动速度与摆动腿水平角、缓冲时间占总时间的百分比与垂直速度呈显著性正相关.%This paper studies male high jumper's take-off technique in the 11th IAAF World Junior Championship with three-dimensional kinematics analysis method. The result shows that this text is tried the last step technique and the world top jumper's difference being small;the H2, performance and largest height of center are relatively low; some is too near from the ver-tical plane of horizontal pole to take-off; run-up pace and take-off centre of body weight fin-ish,vertical pace low; ability to utilize horizontal pace is not enough; take-off weight vertical pace expire, with accelerate distance vertically, swing the leg and swing the pace with swinging the horizontal angle of leg, buffering the significance positive correlation presented with the vertical pace in the percentage of the time in total time.

  2. 舰载机弹射起飞上升段控制律研究%Control Law for Climbing Stage of Carrier-Based Aircraft in Catapult-Assisted Take-Off

    Institute of Scientific and Technical Information of China (English)

    朱熠; 江驹; 甄子洋; 王新华; 焦鑫

    2012-01-01

    针对舰载机的安全弹射起飞要求,研究了弹射起飞上升段控制律设计问题.分析了常用弹射装置原理以及弹射起飞的工作流程.构建了弹射起飞过程中的上升段相关数学模型,包括某型舰载机的纵向模型、前起落架突伸结构和阵风模型.设计了舰载机起飞离舰后上升段的飞行姿态控制律,在仿真中将加速滑跑阶段的各种因素转化成初始条件,同时分析了阵风干扰对上升段飞机飞行特性的影响.仿真结果表明:设计的姿态控制律可以改善舰载机在离舰上升段的姿态,抵抗气流干扰等因素的影响,提高弹射起飞的安全性.%According to the safety requirements of catapult-assisted take-off,the control law design for the aircraft in the climbing stage was studied. The principle of a common catapult device was studied and the process of catapult-assisted take-off was introduced. The mathematic models in the climbing stage were established, including the model of longitudinal small perturbation equations of the aircraft, the sudden stretch structure of the nose gear and the gust disturbance. The attitude control law of the climbing stage was designed. In simulation, the initial value was based on the influence of different factors in speeding stage. The influence of the gust disturbance on flight performance of the aircraft in its climbing stage was also analyzed. The results of simulation showed that the designed control law can improve the aircraft attitude in the climbing stage, decrease the adverse effect of gust disturbance, and thus can enhance the security of the catapult-assisted take-off.

  3. 浅谈美国对战后日本经济起飞的作用%A Brief Discussion on the Role of America in the Take-off of Post-war Japan's Economy

    Institute of Scientific and Technical Information of China (English)

    方伟

    2012-01-01

      二战给日本带来了深重的灾难,但是日本只用了二三十年的时间便实现了经济的恢复与发展,成为资本主义世界强国。日本之所以崛起,与美国的作用是分不开的,本文主要讲述美国对战后日本起飞的作用%  World War II brought a heavy disaster to the Japa-nese,however,Japan had just spent three decades to achieve ec-onomic recovery and development,and became the world power of capitalism.The role of the United States is inseparable in the rise of Japan. This article focuses on the role of the United States in the take-off of Japan's economy after World War II.

  4. Research on Takeoff Technique of Movement 813 of Elite Men' s Trampoline Athletes%我国优秀男子蹦床运动员813〈起跳技术研究

    Institute of Scientific and Technical Information of China (English)

    王海; 李茂

    2011-01-01

    Through using the method of biomechanical analysis, comparison and literature review, this paper makes analysis on takeoff technique of movement 813 of men' s trampoline athletes LU Chun - long and DONG Dong. The result shows that when finishing the movement 813, the certain angle of touching net is very important.%采用运动生物力学分析、对比分析、文献资料等方法,对我国优秀男子蹦床运动员陆春龙与董栋813〈起跳技术进行研究。结果表明:完成813〈时以一定的入网角触网;蹬伸从“最佳登伸”时刻开始达到“人网合一”的最佳效果;到压网最低点时压网要充分;离网时以一定角度离网,带臂要对称,头部要梗直,向前上方挺髋拱膝上体有一定范围的后倒,避免出现起跳网上转体现象。

  5. 优秀男子跳远运动员起跳技术的运动学研究--以全国田径锦标赛石家庄站为例%A Study of Kinematics on Take-off Technique of Chinese Elite Long Jump Athelites--Taking National Track and Field Championships in Shijiazhuang Station as an Example

    Institute of Scientific and Technical Information of China (English)

    康红哲; 杜鹏; 贾为宗

    2015-01-01

    In the whole course of completing long jump, take-off technique is not only the central part of linking run-up and jump, but also the guarantee of elite athletes achieving outstanding performances. This study makes an analysis of kinematics of eight elite male long jump athletes through two JVC9800 high-speed cameras and Ariel image analytic system. Results show that the elite male long jump athletes in our country have significant differences inlanding angle, sector angle and leg thrust angle from foreign athletes; Long buffer time and far-distanced gravity projection point of the body at take-off moment are the factors that influence the rapid support stretching in takeoff; Enhancing the power of the take-off leg can help improve the long jump performance; At the take-off moment, the angles of ankle joint and knee joint are small and the angle of hip joint is similar to that of the world elite athletes; The horizontal lifting velocity is higher than that of the foreign athelites, but the vertical lifting velocity is lower than theirs.%在完成整个跳远的过程中,起跳技术是衔接助跑与腾空的中心环节,也是运动员创造优异运动成绩的必要保障。通过两台 JVC9800高速摄相机和 Ariel 图像解析系统对8名优秀男子跳远运动员进行运动学分析。结果表明:现阶段我国优秀男子跳远运动员着地角、扇面角和蹬地角都与国外运动员具有显著性的差异;缓冲时间过长,起跳瞬间身体重心投影点较远,是影响快速支撑蹬伸起跳的因素,增强起跳腿的力量有助于提高跳远的成绩;起跳瞬间踝关节角和膝关节角较小,髋关节角度与世界优秀运动员较为接近;腾起水平速度高于国外选手,但是腾起的垂直速度比国外运动员低。

  6. Measurement and Analysis on Take-off Ability of Basketball Players′Layup Shot%篮球运动员行进间投篮跨步起跳能力的测量与分析

    Institute of Scientific and Technical Information of China (English)

    贾恩峰

    2016-01-01

    The paper takes the basketball players′take-off ability of layup shot as objects of study , by means of study method of kinematics measurement.Research results show that the buffer speed of knee joint is an important manifestation of basketball players′take-off ability of layup shot.Basketball players′step take-off power is mainly determined by extensors′maximum effort of hip joint and flexors′accelerating force of knee joint; Coordination of actions is determined by the eccentric ability of the central foot and lifting time of non central leg .The stability of the action is determined by the maximum strength level of ankle extensor muscle.We should strengthen exercises of the extensor strength of ankle joint.%采用运动学测量的研究方法,对篮球运动员行进间投篮跨步起跳能力进行研究,结果表明,缓冲速度快、时间短是篮球运动员行进间投篮跨步起跳能力的重要体现;篮球运动员的跨步起跳力量主要由髋关节伸肌最大力量和膝关节屈肌的快速力量决定;动作协调性主要由中枢腿的退让收缩能力和非中枢腿的上抬时机决定;动作的稳定性由踝关节伸肌肉最大力量水平决定,需要加强踝关节伸肌力量练习。

  7. Research on Estimation of Take-off Weight of Large and Medium Civil Aircraft%大中型民用飞机起飞总重估算方法研究

    Institute of Scientific and Technical Information of China (English)

    班凯

    2012-01-01

    推导了基于发动机推力估算起飞总重和基于旅客座位数估算起飞总重的公式.通过多种大中型喷气式民用客机相关参数的统计值,建立起飞总重对相关参数的多元回归分析模型,通过显著性检验,说明模型是有效的,并据此建立了新的起飞总重估算公式.通过算例结果分析表明,新的起飞总重估算公式具有很高精度.在新机的方案设计阶段若能给定此公式所需的相关参数,可以计算得到相对合理的设计起飞总重值.%Formulas for estimating civil airplane take- off weight based on engine thrust and seating capacity are presented respectively. Through a variety of jet civil airplanes' statistical data of related parameters, the multiple regression analysis model of take- off weight with respect to the related parameters is built. The significance test shows that the model is effective, and a novel formula for estimating civil airplane take- off weight is established. The analysis of examples shows that the new formula is accurate. If the parameters required is given in the scheme design stage,then the relatively reasonable design take-off weight value can be obtained by the method of this paper.

  8. Flight Path Measurement During Takeoff and Landing Phase Based-on High Speed Camera Array%基于高速像机阵列的起飞着陆段航迹测量技术

    Institute of Scientific and Technical Information of China (English)

    张杰; 冯巧宁

    2013-01-01

    The sampling frequency and accuracy of GPS information are very low.To get higher frequency and higher precision of location and speed parameter,the motion process of the flight is taken by the high-speed camera array during the takeoff and landing phase.Through analyzing the image sequence,the position,velocity can be solved by digital image processing and 3-dimentional linear transformation.This method can get the position and velocity information of aircraft by photos.And it can be a reference in aircraft trajectory measurement.%针对GPS采样频率低、动态精度差的问题,为了在飞机起降性能测试课题中获取更高频率、更高精度的位置、速度等参数信息,利用高速像机阵列对飞机的起飞着陆运动过程进行接力拍摄,通过对各站点高速像机拍摄到的图像序列分析处理,利用数字图像处理技术、近景数字摄影测量三维直接线性变换(DLT)等算法,解算出了飞机的位置及速度数据.该方法对其他类似飞行物的轨迹测量具有指导意义.

  9. Modeling of Carrier-based Aircraft Ski Jump Take-off Based on Tensor%基于张量的舰载机滑跃式起飞动力学建模

    Institute of Scientific and Technical Information of China (English)

    刘伟伟; 屈香菊

    2005-01-01

    A general mathematical model of carrier-based aircraft ski jump take-off is derived based on tensor. The carrier, the aircraft body and the movable parts of the landing gears are treated as independent entities. These entities are assembled into a multi-rigid-body system with flexible links. Dynamical equations of each entity are derived on the basis of the Newton law and the Euler transformation. Using the invariance property of the tensor, the dynamical and kinematical equations are converted to tensor forms which are invariant under time-dependent coordinate transformations. Then the tensor-formed equations are expressed by the matrix operation. Differential equation group of the matrix form is formulated for the programming. The closure of the model is discussed, and the simulation results are given.%基于张量推导建立了舰载机起飞过程的一般数学模型.将航空母舰、飞机、飞机的前后起落架活动部分视为具有独立质量的实体, 构成柔性连接的多刚体系统.用牛顿-欧拉法(N-E法)建立各个实体的动力学方程.利用张量的不变性对动力学和运动学方程进行变换,消除坐标系转换的影响,得到矩阵形式的微分方程组.这样动力学的全部计算均统一为矩阵形式.讨论了模型的封闭性,并给出了仿真结果.

  10. 微小型垂直起降飞行器升力螺旋桨实验%Experimental study of static-thrust propeller for mini-vertical takeoff and landing (VTOL) aircraft

    Institute of Scientific and Technical Information of China (English)

    吴大卫; 李寒冰; 李书

    2011-01-01

    为提高微小型无人垂直起降飞行器的载重能力,针对其升力螺旋桨的悬停性能进行了系统性的参数对比实验.通过对实验数据进行分析对比和静推力状态螺旋桨片条理论计算,得出了各种几何参数对几何定距螺旋桨悬停性能影响的一系列结论.给出了此类螺旋桨的性能实验数据,结果表明较大的直径可显著改善悬停性能,同时存在最佳的中等偏低几何螺距、实度和平面形状,但后两个因素对此类螺旋桨的悬停性能影响较小.%Systematic experiments about static-thrust propellers' hovering performance with different geometrical parameters for unmanned mini-vertical takeoff and landing (VTOL) aircraft were made to enhance the lifting ability for more payloads. A series of conclusions about geometrical parameters' influence on hovering performance for propellers with constant pitch were summarized based on the test data and propeller strip theory suitable for static-thrust condition. This paper provides the test data of these propellers. The results show that larger diameter can improve hovering performance obviously, and there exist optimal lower medium pitch value, solidity and planform, but the latter two factors don't influence hovering performance obviously.

  11. 柏林田径世锦赛男子三级跳远运动员起跳技术分析%Analysis on Take-off Techniques of Triple Jump Athletes in the Track and Field World Championships in Berlin

    Institute of Scientific and Technical Information of China (English)

    袁晓毅; 吴冀; 赵俊华

    2011-01-01

    The techniques of triple jump are indivisible and irreversible.The study of the interrelated techniques of the three take-offs that determine the final results is not only a precondition of bringing athletes' potential into full play reasonably,but also a process of deepening the understanding of the techniques.This study,based on the performance of the top eight athletes in the triple jump final of 2009 Berlin World Champions,unfolds the status quo and characteristics of top-level athletes' take-off techniques and provides a reference for narrowing the gap between the techniques of athletes at home and abroad and improving take-off performance of domestic athletes.%三级跳远技术结构是一个不可分割的整体,其技术环节存在不可颠倒性。就三跳而言,三次起跳技术相互关联并直接决定了最后的总成绩,所以对三级跳远技术的深入研究是充分、合理发挥人体潜能的条件,也是人们对三级跳远技术的认识不断完善的一个过程。通过对世界顶尖级运动员三次起跳技术分析,揭示近年高水平运动员起跳技术现状和特点,为我国运动员改进技术找出差距原因,提高起跳效果提供参考依据。

  12. Halloo Kosmos, hallo Maa! / Kairit Tsäro

    Index Scriptorium Estoniae

    Tsäro, Kairit, 1974-

    2009-01-01

    Režissööride Rob Lettermani ja Conrad Vernoni animafilm "Koletised tulnukate vastu", mis on dubleeritud ka eesti keelde. Tallinnas Coca Cola Plazas, Tartus kinos Ekraan vaadatav 3D (kolmemõõtmelisena)

  13. Resources for Teaching Linear Algebra. MAA Notes Volume 42.

    Science.gov (United States)

    Carlson, David, Ed.; And Others

    This book takes the position that the teaching of elementary linear algebra can be made more effective by emphasizing applications, exposition, and pedagogy. It includes the recommendations of the Linear Algebra Curriculum Study Group with their core syllabus for the first course, and the thoughts of mathematics faculty who have taught linear…

  14. Eestlased tulevad mitme maa ja mere tagant koju / Vahur Koorits

    Index Scriptorium Estoniae

    Koorits, Vahur, 1981-

    2010-01-01

    Islandi vulkaanituhast põhjustatud lennuliikluse ajutine seiskumine tingis riigijuhtide ja ametnike reisimise busside ja rongidega. Kaart; Diagramm. President Toomas Hendrik Ilves koos kaaskonnaga alustas tagasiteed Türgi-visiidilt autodega läbi Bulgaaria, Serbia, Ungari, Slovakkia, Poola, Leedu ja Läti. Eesti riigipea kohtus Serbia riigipea Boris Tadic'iga ning kavatseb 20. aprillil 2010 asetada pärja Poola presidendi Lech Kaczynski ja tema abikaasa hauale Krakowis. Vt. ka foto lk. 1. Ametlik visiit Türgi Vabariiki 15.-21.04.2010

  15. Elamused maa ja taeva vahel / Kaileen Mägi

    Index Scriptorium Estoniae

    Mägi, Kaileen, 1975-

    2006-01-01

    Konkursi Ettevõtluse Auhind 2006 Turismi Uuendaja 2006 kategoorias osutus parimaks Otepää Seikluspark OÜ. Prantslase Pierre Get Perre projekteeritud seikluspark pakub unustamatuid elamusi. Tabel: Turismi uuendaja 2006 nominendid ja nende lühitutvustus

  16. Cleaning must be well planned; Rengjoeringsopplegget maa planlegges

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    Both detergents and water may damage painted and varnished surfaces in the long run. It is therefore important to choose the right cleaning method once the rooms are put to use. It is essential that a cleaning method be found that does not require great quantities of chemicals. Professional cleaning implies that a program is used that describes in detail the cleaning operation in each room. Materials used in walls often do not tolerate much moisture. If such components are cleaned by means of too much water to which is added detergents, they may swell. These walls are exposed above all the first time they are cleaned because those doing the cleaning are not aware of the situation. Some of the detergents in current use contain hazardous components. It is very important to know the individual detergent's contents of volatile components as these may cause damage. Some detergents may lead to deterioration of the surface if incorrectly used. Some contain perfume or dyes that may develop allergies. Thus, detergents must be selected with due consideration of both the subject and the personnel. Declaration and user instruction is necessary.

  17. Resources for Teaching Linear Algebra. MAA Notes Volume 42.

    Science.gov (United States)

    Carlson, David, Ed.; And Others

    This book takes the position that the teaching of elementary linear algebra can be made more effective by emphasizing applications, exposition, and pedagogy. It includes the recommendations of the Linear Algebra Curriculum Study Group with their core syllabus for the first course, and the thoughts of mathematics faculty who have taught linear…

  18. Kuressaares loevad kolme maa luuletajad oma loomingut / Katri Lindau

    Index Scriptorium Estoniae

    Lindau, Katri

    2007-01-01

    Eesti luuletajad Andres Ehin ja Ly Seppel, soome luuletajad A. W. Yrjänä ning Saila Susiluoto ja läti luuletajad Juris Kronbergs ning Guntars Godinsh osalevad luuleüritusel "Luulesõit" ja loevad omakeelset luulet

  19. Teenäitaja-maa Belgia trotsib USAd / Jeroen Bult

    Index Scriptorium Estoniae

    Bult, Jeroen

    2004-01-01

    Probleemidest Belgia ja USA suhetes, mis tekkisid Belgias avaldatud raporti "Genotsiidid" pärast, mille järgi on Põhja-Ameerikas tapetud 15 miljonit pärisameeriklast ja pole mainitud genotsiidi lõpuaastat. Belgia välispoliitika seostamisest antiamerikanismiga

  20. Tõotatud maa - kellele? / Tal Adler ; interv. Reet Varblane

    Index Scriptorium Estoniae

    Adler, Tal

    2006-01-01

    Intervjuu iisraeli kunstniku Tal Adler'iga, kelle näitust "Tunnustamata / Unrecognized" saab Tallinna Linnagaleriis vaadata kuni 3. XII. Näitus on beduiinide tunnustamata küladest Iisraeli lõunaosas Negevi piitkonnas

  1. Tõotatud maa - kellele? / Tal Adler ; interv. Reet Varblane

    Index Scriptorium Estoniae

    Adler, Tal

    2006-01-01

    Intervjuu iisraeli kunstniku Tal Adler'iga, kelle näitust "Tunnustamata / Unrecognized" saab Tallinna Linnagaleriis vaadata kuni 3. XII. Näitus on beduiinide tunnustamata küladest Iisraeli lõunaosas Negevi piitkonnas

  2. Elamused maa ja taeva vahel / Kaileen Mägi

    Index Scriptorium Estoniae

    Mägi, Kaileen, 1975-

    2006-01-01

    Konkursi Ettevõtluse Auhind 2006 Turismi Uuendaja 2006 kategoorias osutus parimaks Otepää Seikluspark OÜ. Prantslase Pierre Get Perre projekteeritud seikluspark pakub unustamatuid elamusi. Tabel: Turismi uuendaja 2006 nominendid ja nende lühitutvustus

  3. The Mindful Attention Awareness Scale (MAAS) in an Argentine Population

    Science.gov (United States)

    Montes, Silvana Andrea; Ledesma, Rubén Daniel; García, Natalia Mariana; Poó, Fernando Martín

    2014-01-01

    The purpose of this study was to provide evidence of validity for the Mindful Attention Awareness Scale scores in an Argentine sample (Spanish-language version). Results indicated satisfactory psychometric properties (a one-factor structure, good item discrimination, high reliability, and significant correlations with additional measures). This…

  4. Halloo Kosmos, hallo Maa! / Kairit Tsäro

    Index Scriptorium Estoniae

    Tsäro, Kairit, 1974-

    2009-01-01

    Režissööride Rob Lettermani ja Conrad Vernoni animafilm "Koletised tulnukate vastu", mis on dubleeritud ka eesti keelde. Tallinnas Coca Cola Plazas, Tartus kinos Ekraan vaadatav 3D (kolmemõõtmelisena)

  5. STUDY ON ASPIRIN-MAA HYDROGEL MIP SYSTEM

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The controlled release system of MIP-Asp hydrogel was prepared by using self-assembly molecular imprinted technique (MIP). 1H NMR was used to detect the changes of active hydrogen atoms. Moreover, the effect of crosslinking degree of hydrogel on the release of medicine was investigated and the temperature/pH sensitivity was also considered. The results demonstrated that: the MIPs-Asp was a procedure involving the participation of active hydrogen; the lower crosslinking degree corresponded to the higher medicine release ratio; high temperature is better for the release; weak acidity is better for the release of Asp.

  6. STUDY ON ASPIRIN-MAA HYDROGEL MIP SYSTEM

    Institute of Scientific and Technical Information of China (English)

    LIU Xiaohang; CHENG Guoxiang; LI Guohua

    2008-01-01

    The controUed release system of MIP-Asp hydrogel was prepared by using self-assembly molecular imprinted technique (MIP).1H NMR was used to detect the changes of active hydrogen atoms.Moreover, the effect of crosslinkin8 degree of hydrogel on the release of medicine was investigated and the temperature/pH sensitivity was also considered.The results demonstrated that: the MIPs-Asp was a procedure involving the participation of active hydrogen; the lower crosslinking degree corresponded to the higher medicine release ratio; high temperature is better for the release; weak acidity is better for the release of Asp.

  7. Mis saab maaärist? / Ester Šank

    Index Scriptorium Estoniae

    Šank, Ester, 1956-

    2000-01-01

    Maaostu piirava seaduseelnõu Riigikogu menetlusest välja arvamist kommenteerib Vootele Hansen. Lisatud ka eelnõu autorite Jaanus Marrandi, Harri Õunapuu ja töörühma liikme Ain Kendra seisukohad

  8. Insights from the MAA National Study of College Calculus

    Science.gov (United States)

    Bressoud, David

    2015-01-01

    Over the past five years, the Mathematical Association of America, with support from the National Science Foundation, has explored the teaching of mainstream Calculus 1 at the postsecondary level, where by "mainstream" we mean those courses that can be used as part of the prerequisite stream to more advanced postsecondary mathematics. We…

  9. Rohelise maa uus film vallutab Euroopat / Margit Tõnson

    Index Scriptorium Estoniae

    Tõnson, Margit, 1978-

    2004-01-01

    Iiri filmiprogrammis "Green Screen", mille on koostanud Iiri Filmiinstituut ja Iiri Filminõukogu Euroopa Liitu astuvate riikide jaoks, võib kinos "Sõprus" näha kaheksat uuemat filmi. Tutvustavalt kolmest mängufilmist : Kirsten Sheridani "Diskopõrsad", Liz Gilli "Kuldkala mälu" ja Aisling Walshi "St Jude'i vangid"

  10. Rohelise maa uus film vallutab Euroopat / Margit Tõnson

    Index Scriptorium Estoniae

    Tõnson, Margit, 1978-

    2004-01-01

    Iiri filmiprogrammis "Green Screen", mille on koostanud Iiri Filmiinstituut ja Iiri Filminõukogu Euroopa Liitu astuvate riikide jaoks, võib kinos "Sõprus" näha kaheksat uuemat filmi. Tutvustavalt kolmest mängufilmist : Kirsten Sheridani "Diskopõrsad", Liz Gilli "Kuldkala mälu" ja Aisling Walshi "St Jude'i vangid"

  11. Eestlased tulevad mitme maa ja mere tagant koju / Vahur Koorits

    Index Scriptorium Estoniae

    Koorits, Vahur, 1981-

    2010-01-01

    Islandi vulkaanituhast põhjustatud lennuliikluse ajutine seiskumine tingis riigijuhtide ja ametnike reisimise busside ja rongidega. Kaart; Diagramm. President Toomas Hendrik Ilves koos kaaskonnaga alustas tagasiteed Türgi-visiidilt autodega läbi Bulgaaria, Serbia, Ungari, Slovakkia, Poola, Leedu ja Läti. Eesti riigipea kohtus Serbia riigipea Boris Tadic'iga ning kavatseb 20. aprillil 2010 asetada pärja Poola presidendi Lech Kaczynski ja tema abikaasa hauale Krakowis. Vt. ka foto lk. 1. Ametlik visiit Türgi Vabariiki 15.-21.04.2010

  12. Insights from the MAA National Study of College Calculus

    Science.gov (United States)

    Bressoud, David

    2015-01-01

    Over the past five years, the Mathematical Association of America, with support from the National Science Foundation, has explored the teaching of mainstream Calculus 1 at the postsecondary level, where by "mainstream" we mean those courses that can be used as part of the prerequisite stream to more advanced postsecondary mathematics. We…

  13. The Mindful Attention Awareness Scale (MAAS) in an Argentine Population

    Science.gov (United States)

    Montes, Silvana Andrea; Ledesma, Rubén Daniel; García, Natalia Mariana; Poó, Fernando Martín

    2014-01-01

    The purpose of this study was to provide evidence of validity for the Mindful Attention Awareness Scale scores in an Argentine sample (Spanish-language version). Results indicated satisfactory psychometric properties (a one-factor structure, good item discrimination, high reliability, and significant correlations with additional measures). This…

  14. Mis saab maaärist? / Ester Šank

    Index Scriptorium Estoniae

    Šank, Ester, 1956-

    2000-01-01

    Maaostu piirava seaduseelnõu Riigikogu menetlusest välja arvamist kommenteerib Vootele Hansen. Lisatud ka eelnõu autorite Jaanus Marrandi, Harri Õunapuu ja töörühma liikme Ain Kendra seisukohad

  15. Modelling socio-metabolic transitions: The historical take-off, the acceleration of fossil fuel use, and the 1970s oil price shock - the first trigger of a future decline?

    Science.gov (United States)

    Wiedenhofer, Dominik; Rovenskaya, Elena; Krausmann, Fridolin; Haas, Willi; Fischer-Kowalski, Marina

    2013-04-01

    By talking about socio-metabolic transitions, we talk about changes in the energy base of socio-economic systems, leading to fundamental changes in social and environmental relations. This refers to the historical shift from a biomass-based (agrarian) economy to a fossil fuel based (industrial) economy just as much as to a future shift from fossil fuels to renewable energy carriers. In our presentation, • We will first show that this pattern of transition can be identified for most high income industrial countries: the later the transition started, the faster it proceeded, and the turning point to stabilization of metabolic rates in all of them happened in the early 1970ies. Due to the inherent non-linearity of this process, two approaches will be aplied to estimate parameters for the starting point, transition speed and saturation level: firstly a combination of an expontential and a generalized logistic function and secondly a Gompertz function. For both an iterative test procedure is applied to find the global minimum of the residual error for the whole function and all its parameters. This theory-based approach allows us to apply a robust methodology across all cases, thereby yielding results which can be generalized. • Next, we will show that this was not just a "historical" socio-ecological transition, however. Currently, a substantial number of countries comprising more than half of the world's population are following a similar transitional pathway at an ever accelerating pace. Based on empirical data on physical resource use and the above sketched methodology, we can show that these so-called emerging economies are currently in the take-off or acceleration phase of the very same transition. • Apart from these "endogenous" processes of socio-metabolic transition, we will investigate the effect of external shocks and their impact on the dynamics of energy and materials use. The first such shock we will explore is the oil crisis of 1972 that possibly

  16. The muscle mechanics and dynamics of take-off technology movement in long jump%跳远运动中起跳技术的肌肉力学和动力学研究

    Institute of Scientific and Technical Information of China (English)

    邵晓军; 牛健壮; 孙得朋

    2013-01-01

    The experiments reflect the biomechanical parameters conducive Long Jump technology and its appropriate range to identify the intrinsic link between the technical movements parameters and laws,to provides valuable reference data for the long jump teaching and college training.Through telemetry EMG test and three-dimensional force platform,four outstanding men's long jump athletes are tested using the method of image analysis,mathematical statistics methods.In plate buffer stage,the rectus femoris and the right side gastrocnemius EMG integral of the object of study average of 102.00 uvs 91.25 uvs,the vertical direction force mean 7035.16N.For Class A athlete Mr.Li,the vertical direction force 6428.30N,its value is significantly less than the vertical force mean; in kicking stage,the rectus abdominis integral value reaches 131.00 UVS,the vertical direction force reaches the maximum when the vertical direction force reach a mean 3226.32 N,Li's perpendicular force is 3652.65N,in terms of takeoff leg landing impact force on the ground Class A athlete is significantly less than Class B athletes.Kicking stage,the torso rectus abdominis and the take-off leg of the rectus femoris performance is the most excited,appeared mainly in muscle; when maximum force reaches the vertical direction of the object of study,the higher the rank,the higher the level perpendicular force,by contrast to the horizontal direction.%通过实验客观地反映有利于跳远起跳技术的各项生物力学参数及其适宜范围,找出此技术动作参数间内在联系和规律,为跳远运动的基础训练和深入的理论研究提供参考依据.研究方法上采用遥测肌电测试和三维测力台同步技术,对4名优秀男子跳远运动员的起跳动作进行现场测试,运用图像解析法、数理统计法等方法进行统计分析.在着板缓冲阶段,研究对象右侧股直肌和右侧腓肠肌肌电积分平均值分别为102.00 uvs和91.25 uvs,研究对象

  17. Diagnosis and Analysis on Take-off technique of Excellent Female Long Jumpers —— Taking Top Eight Jumpers in China's Athletics Grand Prix (2011 ) for examples%优秀跳远女运动员起跳技术的指标诊断与分析——以2011年全国田径大奖赛前8名运动员为例

    Institute of Scientific and Technical Information of China (English)

    韩玉柱; 丁伟

    2011-01-01

    本研究采用文献资料法、运动生物力学解析法等,结合运动训练实践提出起跳效率指标,以诊断起跳腿的效能;同时拟定了起跳支撑期重心腾升角指标,并对这两个指标的定义、应用进行了研究,为准确地诊断我国跳远技术,完善训练计划,提高运动员成绩提供参考。%Introduced by the method of literal materials and the analysis of sports biomechanics, this research proposes the diagnosis on efficiency of take-off leg on the basis of take-off efficiency combining with sport training practice. Meantime, it also protocols the standards of rising angles of take-off support center and studies definition and application of the two standards, which has given great references to correct diagnosis on China's long jump technique, perfect training plans and improve athletes' performance.

  18. Dynamic stability of a seaplane in takeoff

    CSIR Research Space (South Africa)

    Dala, L

    2015-01-01

    Full Text Available set of conditions, a hydroplaning hull will begin to porpoise, an instability oscillation in both the vertical direction, and about the centre of gravity In order to investigate the porpoising motion, a shallow water flume was used. It was the first...

  19. The Takeoff of Social Media in Tourism

    DEFF Research Database (Denmark)

    Hvass, Kristian Anders; Munar, Ana Maria

    2012-01-01

    Over the years, online marketing has grown in importance in the tourism industry. This media space offers companies throughout the tourism value system numerous marketing tools, one of the most recent being social media. Social media allows companies to interact directly with customers via various...... by airlines is analyzed and categorized according to the promotional marketing mix. In addition, the authors propose four categories to describe the overall communicative behavior. Among the results, it is shown that there is a lack of strategic perspective among airlines’ utilization of social media...... as it is being used with limited uniformity. These findings may aid marketing departments in their marketing and social media communication strategies, while complementing current marketing research....

  20. Realize Tarim Oilfield Take-off

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ PetroChina Tarim Oilfield Company, former Tarim Petroleum Exploration & Development Bureau founded in April 1989, is one of the regional subsidiaries under PetroChina Company Limited (PetroChina). It is a large-scale oil company integrated in petroleum exploration and development, oil refining, production of petrochemicals, technological study and marketing business. Headquartered on the bank of Peacock River in Korle City of Xinjiang Uygur Autonomous Region, the company operates itself in more than 20 counties of five prefectures around Tarim Basin. It has since its foundation adhered to the principles of "adopting new management system and new technology, as well as realizing high-grade and high-efficiency battle for oil", implemented market operation, contract management,professional service, and socialization dependence.

  1. Cleared for Takeoff: Paper Airplanes in Flight

    Science.gov (United States)

    Reeder, Stacy L.

    2012-01-01

    As middle school mathematics becomes more abstract, it is imperative for teachers to introduce concepts in ways that are interesting and meaningful to students. Since her students struggled at times to stay engaged in mathematics and seemed to have difficulty developing conceptual understanding, the author looked for ways to create learning…

  2. Effects of temperature and light on take-off activity of Bactrocera cucurbitae%温度、光照强度对瓜实蝇成虫飞行行为的影响

    Institute of Scientific and Technical Information of China (English)

    崔志富; 曹凤勤; 程立生; 符悦冠; 万方浩; 张桂芬

    2016-01-01

    [Background] Bactrocera cucurbitae is the important pest of Amphisarca in Sourthern China. The objective of this study was to examine the fly movement of B. cucurbitae to between control this fly. [Method] Based on the known biological characteris-tics, artificial climate chamber and some other equipment were used to study the effects of temperature and light changes on fly be-havior activity of B. cucurbitae. [Result] The results showed that the fly activities increased with temperature starting at 15℃ with an optimum temperature between 20 and 30 ℃. Flying activities were obviously the greatest at temperatures above 35 ℃ and the least when temperatures dropped under 10℃. The activity percent of B. cucurbitae is more than 50% at 25~40℃, but it is 0% at 10、15 and 45 ℃ respectively. Light intensity also affected fly behavior with fly activities increasing over 2400 lx and reaching a peak at 9600 lx. Extreme light intensity (12000 lx) inhibited flight behavior. The number of take-off activity of B. cucurbitae increased with the increase of light intensity.[Conclusion and significance] Extremes in temperature and light intensity may limit flight activity of B. cucurbitae. Moderate high temperature can encourage fly behavior.%【背景】瓜实蝇是我国南方瓜果的主要害虫。本试验分析了影响瓜实蝇成虫飞行行为及活跃度的原因,以便能更有效地控制瓜实蝇危害。【方法】在已知瓜实蝇的生物学特性及部分活动规律的基础上利用智能人工气候箱等设施,分别测定温度、光照对瓜实蝇的飞行行为的影响。【结果】瓜实蝇成虫在15℃下开始飞行,飞行活动的群体数量随着温度的升高而增加,最适飞行活动温度范围为20~30℃,低温10℃明显对其飞行行为有抑制作用,高温(35℃以上)明显对其有刺激作用,促进其飞行行为的发生。瓜实蝇成虫的活跃度在25~40℃下较高,均大于50%,在10、15和45℃下则为0

  3. 中国男子跳远运动员起跳不同时相的运动学参数%Study on different kinematic parameters during the take-off phase of Chinese male broad jump athletes

    Institute of Scientific and Technical Information of China (English)

    马俊明; 周巧玲; 朱咏贤

    2003-01-01

    目的中国优秀男子跳远运动员起跳中不同时相速度变化特征的研究 ,对提高跳远成绩提供理论价值.方法采用现场定点高速摄影、影片分析以及数理统计等方法,通过对 8名优秀男子跳远运动员 A, B两组起跳阶段不同时相身体重心水平速度和垂直速度的变化与着板角、起跳缓冲和蹬伸阶段膝角变化的比较分析.结果成绩较好时,缓冲阶段身体重心水平速度的减小和垂直速度的增加相对较大;蹬伸阶段身体重心水平速度略有回升、垂直速度保持增加的态势,而且,离板瞬间身体重心水平速度和垂直速度都呈现出相对较大的趋势.结论中国优秀男子跳远运动员起跳缓冲阶段身体重心水平速度减小和垂直速度增加之间存在着密切关系.%Aim To study the velocity variations of take-off phase of Chinese male elite broad jump athletes so as to lay a theoretical basis for the improvement of broad jump results.Methods High-speed camera photography and method of film analysis were used to record and analyze the jumping results of 7 male elite Chinese broad jump athletes. The optimal results of these 8 athletes were included in group A,and the worst results in group B.The variations of the body center gravity horizontal velocity and vertical velocity, and the variations of the landing board angle of the jumping foot, buffer and knee angle during the taking off phase were compared and analyzed between A and B groups.Results The decrease of the horizontal velocity and the increase of the vertical velocity were more remarkable in the group A than in the group B during the buffer phase.The Chinese male elite long jumpers tended to incline to a small landing angle when the taking-off foot touched the board coordinated with obvious knee angle variations during the buffer and taking-off phases The horizontal velocity and vertical velocity of the athletes' body center gravity inclined to the tendency of

  4. Study on the Takeoff Leg's Capacity of Stretching-Shortening Cycle in Male Triple Jumpers%男子三级跳远运动员起跳腿“拉长—缩短周期”收缩能力的研究

    Institute of Scientific and Technical Information of China (English)

    龙跃玉; 吕季东; 徐剑光

    2001-01-01

    Employing biomechanical research methods, the authors analyzed the takeoff leg’s capacity of stretching-shortening cycle (SSC) in different levels of male triple jumpers. The results showed that the muscle response features of the takeoff leg affected the performance; the SSC capacity of high-level jumpers was better than that of low-level jumpers; the hip joint was not the main joint in reducing the load; the eccentric capacity of the knee joint had great effect on takeoff; there showed no significant difference between high-level and low-level jumpers in the eccentric capacity of ankle joints; as the planting horizontal velocity increased, the range of ankle joint's buffer increased; and the average extension angular velocity of high-level jumpers' ankle joint was greater than that of low-level jumpers.%运用运动生物力学的方法对两种不同水平的男子三级跳远运动员,进行了起跳腿的“拉长—缩短周期”收缩能力的对比研究。结果表明,三级跳远运动员起跳腿的肌肉反应特性,是影响三级跳远成绩的一个重要因素,水平高的三级跳远运动员起跳腿“拉长-缩短周期”收缩能力总体上高于低水平运动员;髋关节并不是缓冲外界负荷的主要关节;膝关节的退让工作能力对起跳效果有很大的影响;不同水平运动员之间,踝关节伸肌群的退让工作能力不具显著性差异;踝关节的缓冲幅度很大程度上是受上板水平速度的影响;高水平运动员的踝关节蹬伸平均角速度要大于低水平运动员的。

  5. Considerations For Distributed Short Takeoff Vertical Landing (STOVL) Operations

    Science.gov (United States)

    2015-05-18

    Commander (JFC) with options in the near -peer Anti-Access / Area Denial (A2/AD) environment. It is an enabler for the JFC’s larger Joint Operational...Protection, Operational Deception, Joint Platform Independence, Near -peer battle 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT 18. NUMBER...Operations, seeks to provide the Joint Force Commander (JFC) with options in the near -peer Anti-Access / Area Denial (A2/AD) environment. It is an

  6. Hydraulic power take-off for wave energy systems

    DEFF Research Database (Denmark)

    Christensen, Georg Kronborg

    2001-01-01

    Investigation and laboratory experiments with a hydraulic power conversion system for converting forces from a 2.5m diamter float to extract energy from seawaves. The test rig consists of a hydraulic wave simulator and a hydraulic point absorber. The absorber converts the incomming forces...

  7. 14 CFR 91.175 - Takeoff and landing under IFR.

    Science.gov (United States)

    2010-01-01

    ..., vertical speed, aircraft attitude, heading, altitude, command guidance as appropriate for the approach to... characteristics and dynamics are suitable for manual control of the aircraft. ... airport, each person operating an aircraft must use a standard instrument approach procedure prescribed in...

  8. Alternative energies. Sustainable biofuels technically near take-off

    Energy Technology Data Exchange (ETDEWEB)

    Preesman, L.

    2009-05-15

    The aircraft company Boeing says it has proven the technical viability of biofuels for use in commercial aircraft. Now the company wants to speed up the process of making biofuels available on a commercial scale.

  9. Refrigeration and the Reduction of the Takeoff Rate of Bushmeat

    Directory of Open Access Journals (Sweden)

    Andrew J. Buck

    2017-01-01

    Full Text Available Rising incomes in the developing world has led to increased consumption of bushmeat as a luxury good with a mounting risk of species extirpation. In a two-period model with stochastic supply, this article shows that the simple expedient of introducing refrigeration to the bushmeat markets can lead to the reduction of harvest rates. In the absence of refrigeration, all bushmeat brought to the market must be sold immediately, putting downward pressure on price and sending the incorrect signal to hunters that everything they kill can and will be sold. With refrigeration, it is possible to carry over inventory from one period to the next, which in turn limits harvests. Although harvest rates fall unequivocally, there may be no incentive for market participants to introduce refrigeration. This last result is explained through the use of the economists’ notion of economic welfare as measured by consumer and producer surplus. Achieving the socially desirable goal of lower harvest rates may require third-party intervention in the market.

  10. Visual Confirmation (VICON) of Takeoff Clearance Signal System Impact Study.

    Science.gov (United States)

    1980-11-01

    1-3 1.5 Report Organization.. .......... . ..... o ........ 1-8 2. DATA ANALYSIS METODOLOGY ........................... 2-i 2.1...SCHEMATIC DIAGRAM OF VICON INSTALLATION ATBRADLEY ........... ..... . . .. . . ...... ... . 1-6 IQ 1-3 VICON LIGHT CLUSTER ............ o .. . .... 1-7 2-1...solution to airport surface traffic problems. VICON consists of a cluster of three green lights located on the left side of the runway at each

  11. Ready for Takeoff: China’s Advancing Aerospace Industry

    Science.gov (United States)

    2011-01-01

    Several variants have been developed, most of which have been produced for the PLA (“Zhi-11 Utility Helicopter,” 2007). HC120/EC120 Colibri The HAIG...HC120/EC120 Colibri is a lightweight, single-engine heli- copter developed by an industrial partnership comprising Eurocopter, China’s Current

  12. EMA确认吡非尼酮治疗IPF的MAA

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    InterMune公司宣布,3月2日提交的吡非尼酮(pirfenidone)(I)治疗成人特发性肺纤维化(IPF)的销售许可申请(MAA)已获欧洲药品管理局(EMA)确认。EMA确认MAA意味着申请完整,

  13. Tuulepesade või inimeste maa = A Land for Wind Besoms or People? / Antti Ahlava

    Index Scriptorium Estoniae

    Ahlava, Antti

    2004-01-01

    20.-21. sajandi vahetuse soome arhitektuurist, ajakirjast "Arkkitehti", linnaplaneerimisest, linnakultuurist, müütidest (ökologia, poolkinnine kvartal, traditsioonilisus, uued vajadused). Helsingi ja Tallinna koostööst ja kohalikust eripärast. 8 ill

  14. "See õpilasmalev on ikka täitsa tume maa" / Jaanus Kulli

    Index Scriptorium Estoniae

    Kulli, Jaanus, 1955-

    2003-01-01

    Stsenaristide-režissööride Jaak Kilmi ja Rene Reinumägi poolt läbiviidud castingutest filmi "Sigade revolutsioon" peaosaliste leidmiseks, valiti välja õpilased Uku Uusberg, Lilian Alto ja Jass Seljamaa

  15. Kadriorus voolivad mitme maa skulptorid jääst kujusid / Tatjana Bratoljubova

    Index Scriptorium Estoniae

    Bratoljubova, Tatjana

    2008-01-01

    Kadrioru pargi 290. sünnipäeva puhul loovad kunstnikud Tallinnas Luigetiigi ääres jääskulptuure. Taieseid teostavad Kate Robinson Shotimaalt, Natalia Tshistjakova ja Jevgeni Zavjalov Peterburist ning Tiiu Kirsipuu, Ekke Väli ja Kalle Pruuden Eestist

  16. Maa, kus õitseb ajalooliste verstapostide tööstus / Gwynne Dyer

    Index Scriptorium Estoniae

    Dyer, Gwynne

    2005-01-01

    Ilmunud ka: Molodjozh Estonii 31. okt. lk. 11. Enamus iraaklasi hääletas uue põhiseaduse poolt. Iraagis hukkus 2000. USA sõdur, avaliku arvamuse vaikimise põhjustest. Iraagi avaliku arvamuse suhtumisest koalitsioonivägede kohalolekusse

  17. At vi maa frycte dig af idel kjærlighed

    DEFF Research Database (Denmark)

    Olden-Jørgensen, Sebastian

    1997-01-01

    Med udgangspunkt i Max Webers bregeber "Macht" og "Herrschaft" analyseres den danske enevældes konsolideringsperiode 1660-700 i et politisk og kulturhistorisk perspektiv.......Med udgangspunkt i Max Webers bregeber "Macht" og "Herrschaft" analyseres den danske enevældes konsolideringsperiode 1660-700 i et politisk og kulturhistorisk perspektiv....

  18. Saksamaa, immigrantide maa? / Hans-Werner Sinn ; tõlk. Villu Zirnask

    Index Scriptorium Estoniae

    Sinn, Hans-Werner, 1948-

    2006-01-01

    Autori sõnul on massiimmigratsioon Saksamaale kestnud juba mitu aastakümmet ning ei peatu ka järgmistel aastakümnetel. Saksamaa peab aga ümber hindama oma sotsiaalse mudeli ja sobitama selle massiimmigratsiooniga. Tabel: Rahvaarv ja immigrantide arv mõnedes maailma riikides

  19. Miks Soomest sai odavate mobiilikõnede maa? / Sami Seppänen

    Index Scriptorium Estoniae

    Seppänen, Sami

    2005-01-01

    Elisa juhatuse esimees põhjendab, miks Soomes on Euroopa Liidu vanade liikmesriikide ühed madalamad mobiilsidehinnad. Soome mobiilsideturu arengust alates numbriliikuvuse jõustumisest, tehtud vigadest

  20. Laste teadmiste areng. Taevas, Maa ja Päike laste seletustes

    Directory of Open Access Journals (Sweden)

    Eve Kikas

    2005-01-01

    Full Text Available The paper analyses the development of knowledge in children and the problems children face in the process of constructing this knowledge. The results of the empirical studies, carried out on Estonian preschool and school children are described and the reasons for difficulties analysed. Knowledge about the world is mediated by senses and by various mental and material tools. Infants rely on perceptual information, but, additionally, certain perceptual and conceptual structures (beliefs help them to interpret and integrate pieces of this information. When children grow older, their learning about the world will be increasingly based on language. Children synthesise information from different sources and form their own interpretations and models. Vosniadou and her colleagues have studied astronomical concepts among children of different age and cultures using interviews and drawings. They have shown that children first construct initial models (e.g. flat disc or quadrangle model of the earth and afterwards synthetic models (dual, flattened and hollow earth models. Similar models have been found while studying Estonian children (e.g. in their drawings. However, in studies carried out in Estonia, these integrated models were found in the minority of children. The articles present examples which illustrate children's difficulties in understanding the earth as a planet. It is even more difficult for children and adults to understand the reasons for seasonal changes. Several factors influence the changes of temperature: these are taught at school as separate subjects; also, diagrams, which interpretation is not taught to students, also inhibit understanding. A wide-spread explanation behind seasonal changes is `the distance theory', which states that the temperature in summer and winter differs because the distance between the earth and the sun is different during these seasons. The schoolchildren's difficulties in explaining the reasons for seasonal changes are illustrated with examples from interviews and discussions.

  1. "Tarto maa rahwa Näddali-Lehe" (1806) päisillustratsioon / Kristiina Tiideberg

    Index Scriptorium Estoniae

    Tiideberg, Kristiina, 1985-

    2012-01-01

    Tsaarivalitsus lasi ajalehe sulgeda ja kogu tiraaži hävitada. Seetõttu on ainsad säilinud eksemplarid Venemaa Riiklikus Ajalooarhiivis Peterburis. Tartu Ülikooli raamatukogus on säilinud esimese eestikeelse ajalehe originaalgraafikas päisillustratsioon. Illustratsiooni autor Karl August Senff ja Senffi kavandi järgi puulõike valmistanud tõenäoliselt Samuel Benjamin Schultz

  2. Ukraina oranzh koalitsioon ripub jälle maa ja taeva vahel / Taras Burnos

    Index Scriptorium Estoniae

    Burnos, Taras

    2007-01-01

    Kaualubatud Ukraina oranzh koalitsioon jäi oodatult ülemraada esimesel istungil loomata. Selle asemel jõudis suur osa parlamendiliikmetest demonstratiivse saalist lahkumisega oma pahameelt väljendada

  3. Tõotatud maa ameerika lastekirjanduses ehk kuidas kasvatada lapsest diktaator / David Ilmar Beecher

    Index Scriptorium Estoniae

    Beecher, David Ilmar

    2015-01-01

    Lastekirjandusest teadusliku allikana ning Maurice Sendaci lasteraamatust "Where the wild things are" (1964) ja Steven Kelloggi lasteraamatust "The island of the Skog" (1976). Tekst põhineb "Õnnekonverentsi" ettekandel, mis peeti 3. mail 2011. aastal

  4. Fabrication of photonic crystals with nigrosine-doped poly(MMA-co-DVB-co-MAA) particles.

    Science.gov (United States)

    Zhang, Shuai; Zhao, Xiang-Wei; Xu, Hua; Zhu, Rong; Gu, Zhong-Ze

    2007-12-01

    A convenient approach was developed to fabricate monodisperse nigrosine-doped poly(methyl methacrylate-co-divinylbenzene-co-methacrylic acid) nanoparticles with different cross-linkage by soap-free emulsion polymerization at boiling status and swelling process. The dye-doped nanoparticles were used for the fabrication of colloidal crystal films and beads. It was found that nigrosine dye in the nanoparticles can efficiently depress the light scattering inside the colloidal crystal films and eliminate the iridescent effect in the photonic beads. These results make the colloidal crystals useful in photonic paper, bioassay, and so on.

  5. Maa ja taevas = Heaven and Earth / Priit Hõbemägi

    Index Scriptorium Estoniae

    Hõbemägi, Priit, 1957-

    2013-01-01

    Soome telekommunikatsiooniettevõtte Nokia edust. Eesti maismaast üle viiekümne protsendi moodustavad metsad, mis on üks suurimaid väärtusi tänapäeva maailmas. Et leida oma Nokia, tuleb mõnikord istuda lennukisse ja tõusta pilvepiirile, et sealt alla vaadata

  6. "Maa sool" - ületöötanud ja alamakstud / Marcus Hildebrandt

    Index Scriptorium Estoniae

    Hildebrandt, Marcus

    2011-01-01

    Inglise ja ladina keele õpetaja Marcus Hildebrandt kirjutab, et oma esimestel aastatel Eestis õpetajana arvas ta, et diskussioon õpetajate palkade ja õpetajaameti tähtsustamise üle on siiras, kuid nüüd ta kahtleb, kas poliitikuid huvitab tegelikult Eesti haridussüsteemi tulevik

  7. Inimeste tegevus on Maa välja kurnanud / Arko Olesk

    Index Scriptorium Estoniae

    Olesk, Arko, 1981-

    2005-01-01

    Inimesed on viimase 50 aasta jooksul käinud loodusvaradega ümber nii priiskavalt ja hoolimatult, et see seab ohtu tulevaste põlvkondade elukvaliteedi, järeldab eile avaldatud põhjalik raport (Millennium Ecosystem Assessment)

  8. Eco-efficiency in the risk management of contaminated land; Pilaantuneiden maa-alueiden riskinhallinnan ekotehokkuus

    Energy Technology Data Exchange (ETDEWEB)

    Sorvari, J.; Antikainen, R.; Kosola, M.-L.; Jaakkonen, S.; Nerg, N.; Vaenskae, M.; Pyy, O.

    2009-09-15

    This report presents the results of the second phase of the project 'Ecoefficient risk management of contaminated soil and groundwater' (PIRRE2). The project is a follow-up of the PIRRE1-project where an internet based decision support system (DSS) was developed (available at www.ymparisto.fi /syke/pirre). The DSS includes data, guidance and recommendations on risk assessment, cost evaluation, the assessment of environmental impacts and risk communication. It also includes a calculation tool known as PIRTU which can be used site-specifically to compare the eco-efficiency of different risk management options. In the PIRRE2- project the eco-efficiency concept was broadened to cover a regional scale. Therefore, a literature review was conducted in order to identify and further develop indicators that are suitable for measuring regional eco-efficiency. As a result of this review, 14 indicators are proposed which depict the characteristics of the region, the number and properties of contaminated sites remediated annually including their emissions, energy consumption and the consumption of raw materials associated with remediation activities. The use of the indicators was demonstrated in three separate regions, i.e. The City of Helsinki and the areas corresponding e the territorial jurisdiction of the Pirkanmaa regional environment centre and the Kainuu regional environment centre, using data collated from the years 2004, 2005 and 2006. The different characteristics of these regions were particularly evident as differences in the number of contaminated sites and treatment facilities for excavated contaminated soil as well as the differing characteristics of contamination (area of the sites, volume of contaminated soil). The results did not show clear changes or tendency in the regional eco-efficiency over time. Concerning the indicators of eco-efficiency, developing indicators that evince costs and risks was identified as an important development need. Such indicators could not be adopted in this project owing to a lack of regional data. Particularly in the case of costs, the measurement of eco-efficiency requires systematic data collection and monitoring of costs on a regional scale. There are several factors that contribute to the realization of regional eco-efficiency in the risk management of contaminated sites in the future. The most important of these include legislation and guidance; the economic situation; population migration; and the development of methods and practices to assess and manage the risks, costs and other factors involved in decision-making. These factors also partly determine what kind of sites (location, size and contaminants) will be remediated in the future, how the risks are managed (methods) and where and how the excavated soils are reused, treated or disposed of. It was estimated that the pending changes in policy instruments, the goals set in environmental strategies and the development and implementation of remediation and assessment methods would enhance the realization of more eco-efficient risk management in the future. (orig.)

  9. Tõotatud maa ameerika lastekirjanduses ehk kuidas kasvatada lapsest diktaator / David Ilmar Beecher

    Index Scriptorium Estoniae

    Beecher, David Ilmar

    2015-01-01

    Lastekirjandusest teadusliku allikana ning Maurice Sendaci lasteraamatust "Where the wild things are" (1964) ja Steven Kelloggi lasteraamatust "The island of the Skog" (1976). Tekst põhineb "Õnnekonverentsi" ettekandel, mis peeti 3. mail 2011. aastal

  10. Toward a Global Ocean Ecosystem Mid-trophic Automatic Acoustic Sampler (MAAS)

    OpenAIRE

    Handegard, Nils Olav; Demer, David A; Kloser, Rudy; Lehodey, Patrick; Maury, Olivier; Simard, Yvard

    2009-01-01

    Despite their huge biomass and pivotal role, the mid-trophic levels of marine ecosystems are not generally subject to systematic monitoring. Data from such monitoring is crucial for parameterizing, validating, and constraining numerical models of mid-trophic communities. In recent years, acoustic sampling technology has matured, and we argue that acoustic sampling technology, due to long-range propagation in water, is the only means to efficiently observe the large biomass of the mid-trophic ...

  11. Taani - külade maa / Silvi Kuhi-Teesalu, Ulrich Holstein-Holsteinborg

    Index Scriptorium Estoniae

    Kuhi-Teesalu, Silvi

    2005-01-01

    Taanit ja taanlasi eestlase pilguga tutvustab Taani-Eesti Kultuuriinstituudi juhataja Silvi Kuhi-Teesalu. Eestlastest taanlase pilguga räägib Taani-Eesti Seltsi esimees krahv Ulrich Holstein-Holsteinborg

  12. Kindlustajad lõid Eestist terroriohuga maa / Aleksei Günter

    Index Scriptorium Estoniae

    Günter, Aleksei, 1979-

    2006-01-01

    Ilmunud ka: Postimees : na russkom jazõke 27. apr. lk. 2. Julgeolekuanalüütikute ja kindlustusmüüjate hinnangutel põhineva rahvusvahelise riskianalüüsi firma Aon uuringu järgi on Eestis ettevaatust tekitav terrorismioht. Kaart: Eestis on terrorioht suurem kui näiteks Lätis või Leedus. Kommenteerib Kaitsepolitsei komisaar Henno Kuurmann

  13. Inimeste tegevus on Maa välja kurnanud / Arko Olesk

    Index Scriptorium Estoniae

    Olesk, Arko, 1981-

    2005-01-01

    Inimesed on viimase 50 aasta jooksul käinud loodusvaradega ümber nii priiskavalt ja hoolimatult, et see seab ohtu tulevaste põlvkondade elukvaliteedi, järeldab eile avaldatud põhjalik raport (Millennium Ecosystem Assessment)

  14. "See õpilasmalev on ikka täitsa tume maa" / Jaanus Kulli

    Index Scriptorium Estoniae

    Kulli, Jaanus, 1955-

    2003-01-01

    Stsenaristide-režissööride Jaak Kilmi ja Rene Reinumägi poolt läbiviidud castingutest filmi "Sigade revolutsioon" peaosaliste leidmiseks, valiti välja õpilased Uku Uusberg, Lilian Alto ja Jass Seljamaa

  15. Renealmia alpinia (Rottb.: Maas (Zingiberaceae: planta comestible de la Sierra Norte de Puebla (México

    Directory of Open Access Journals (Sweden)

    Macía, Manuel J.

    2002-06-01

    Full Text Available The edible fruits of Renealmia alpinia are highly valued in the Sierra Norte de Puebla (México where they are managed at a household level. The plant is wild in the región, although a rare species. The aril of the fruit is the edible part. After harvesting, the aril is extracted fresh and processed for local consumption. Sometimes the fruits are commercialized in tradicional markets. Only 19% of the total weight of the fruits is used for food.Los frutos comestibles de Renealmia alpinia son muy apreciados en la Sierra Norte de Puebla (México, en donde son manejados a nivel familiar. La planta crece silvestre en la región, aunque es una especie poco frecuente. La parte comestible es el arilo de los frutos. Tras la cosecha, se extrae en fresco el arilo y se procesa para su consumo familiar. Ocasionalmente los frutos se comercializan en los mercados tradicionales. Solamente el 19 % del peso total de los frutos se aprovecha para alimentación.

  16. Kadriorus voolivad mitme maa skulptorid jääst kujusid / Tatjana Bratoljubova

    Index Scriptorium Estoniae

    Bratoljubova, Tatjana

    2008-01-01

    Kadrioru pargi 290. sünnipäeva puhul loovad kunstnikud Tallinnas Luigetiigi ääres jääskulptuure. Taieseid teostavad Kate Robinson Shotimaalt, Natalia Tshistjakova ja Jevgeni Zavjalov Peterburist ning Tiiu Kirsipuu, Ekke Väli ja Kalle Pruuden Eestist

  17. Maa ja taevas = Heaven and Earth / Priit Hõbemägi

    Index Scriptorium Estoniae

    Hõbemägi, Priit, 1957-

    2013-01-01

    Soome telekommunikatsiooniettevõtte Nokia edust. Eesti maismaast üle viiekümne protsendi moodustavad metsad, mis on üks suurimaid väärtusi tänapäeva maailmas. Et leida oma Nokia, tuleb mõnikord istuda lennukisse ja tõusta pilvepiirile, et sealt alla vaadata

  18. Tuulepesade või inimeste maa = A Land for Wind Besoms or People? / Antti Ahlava

    Index Scriptorium Estoniae

    Ahlava, Antti

    2004-01-01

    20.-21. sajandi vahetuse soome arhitektuurist, ajakirjast "Arkkitehti", linnaplaneerimisest, linnakultuurist, müütidest (ökologia, poolkinnine kvartal, traditsioonilisus, uued vajadused). Helsingi ja Tallinna koostööst ja kohalikust eripärast. 8 ill

  19. Taani - külade maa / Silvi Kuhi-Teesalu, Ulrich Holstein-Holsteinborg

    Index Scriptorium Estoniae

    Kuhi-Teesalu, Silvi

    2005-01-01

    Taanit ja taanlasi eestlase pilguga tutvustab Taani-Eesti Kultuuriinstituudi juhataja Silvi Kuhi-Teesalu. Eestlastest taanlase pilguga räägib Taani-Eesti Seltsi esimees krahv Ulrich Holstein-Holsteinborg

  20. Leonid Apananski müüs AB Grupi maa oma firmale / Silva Männik

    Index Scriptorium Estoniae

    Männik, Silva, 1974-

    1999-01-01

    Ilmunud ka: Den za Dnjom Nov/26 lk. 8. Apananski müüs AB Kindlustuse Grupile kuulunud Maakri tänava kinnistu. Skeem: AB Grupist on välja viidud ligikaudu 70 milj. krooni. Ilmunud ka: Den za Dnjom 23. nov. lk. 3

  1. Harry Pye postkaart Londonist : Öö maa peal = Harry Pye's Postcard from London : Night on Earth / Harry Pye

    Index Scriptorium Estoniae

    Pye, Harry, 1973-

    2006-01-01

    Kuraator, kunstnik ja kirjanik Harry Pye kirjeldab Jim Jarmuschi filmist inspireeritud näitust "Night on Earth" Ida-Londonis, endises Viktooria-aegses koolimajas - erinevate inimeste muljed ühest õhtust maakera erinevates paikades koos kunstnike illustratsioonidega

  2. Versatile applications of the culinary-medicinal mushroom Mycoleptodonoides aitchisonii (Berk.) Maas G. (Higher Basidiomycetes): a review.

    Science.gov (United States)

    Chandrasekaran, Gayathri; Oh, Deuk-Sil; Shin, Hyun-Jae

    2012-01-01

    Higher Basidiomycetes medicinal mushroom Mycoleptodonoides aitchisonii has become attractive as a natural health product because of its antihypertensive effects on human health. Moreover, the food industry is especially interested in the preparation of the nutritional tonic of this mushroom. Various studies on this mushroom have shown that it has antidiabetic, antihypertensive, and antioxidant effects. The aim of this review is to report the present findings from studies on this mushroom and to discuss its future prospects.

  3. UCP Mainport : kontseptuaalne uurimus Utrechti raudteejaama maa-ala arendamiseks = UCP Mainport : concept study redevelopment station area Utrecht

    Index Scriptorium Estoniae

    2000-01-01

    Mainporti projekti arhitekt Ben van Berkel, projekteerijad: Van Berkel & Bos, Holland Railconsult. Projekti II etapis uuriti Hoog Catherijne ostukeskuse laiendamist. Projekteerijad: Van Berkel & Bos, Neutelings & Riedijk, Alsop & Störmer.Van Berkel & Bos (arhitektibüroo, Holland). Holland Railconsult (projekteerimisbüroo, Utrecht). Alsop & Störmer (arhitektibüroo, London). Neutelings & Riedijk (arhitektibüroo, Rotterdam)

  4. Landschappen van Maas en Peel : een toegepast historisch-geografisch onderzoek in het streekplangebied Noord- en Midden-Limburg

    NARCIS (Netherlands)

    Renes, J.

    1999-01-01

    Summary

    The theme of this book is use of data on the historic cultural landscape in physical planning. The book contains a general introduction into this subject, as well as a case study: a large survey of the northern and central parts of the

  5. Maardu ja Jõelähtme maa alla võib tulla elektrijaam / Erik Müürsepp

    Index Scriptorium Estoniae

    Müürsepp, Erik

    2009-01-01

    OÜ Maardu Graniidikaevandus taotleb graniidikaevanduse luba, ettevõtte juhi Peep Siitami väitel oleks kaeveõõnte hilisem kasutamine pump-hüdroakumulatsioonijaama asukohana parim võimalus kuni 1000 megavati võimsuse ulatuses tuulikuparkide töö ühtlustamiseks

  6. Eesti Maaülikooli spordihoone = The Sports Hall of the Estonian University of Life Sciences / Margit Mutso

    Index Scriptorium Estoniae

    Mutso, Margit, 1966-

    2010-01-01

    Tartus Kreutzwaldi 3 asuva EMÜ spordihoone arhitektuursest lahendusest. Arhitektid: Maarja Kask, Karli Luik, Ralf Lõoke (Salto AB). Sisearhitektid: Katrin Kaevats, Jaan Port (Funk AB). Žürii liikme Kalle Komissarovi hinnang kultuurkapitali aastapreemiale esitatud hoonele

  7. Landschappen van Maas en Peel : een toegepast historisch-geografisch onderzoek in het streekplangebied Noord- en Midden-Limburg

    NARCIS (Netherlands)

    Renes, J.

    1999-01-01

    SummaryThe theme of this book is use of data on the historic cultural landscape in physical planning. The book contains a general introduction into this subject, as well as a case study: a large survey of the northern and central parts of the Dutch province of Limburg.Struct

  8. UCP Mainport : kontseptuaalne uurimus Utrechti raudteejaama maa-ala arendamiseks = UCP Mainport : concept study redevelopment station area Utrecht

    Index Scriptorium Estoniae

    2000-01-01

    Mainporti projekti arhitekt Ben van Berkel, projekteerijad: Van Berkel & Bos, Holland Railconsult. Projekti II etapis uuriti Hoog Catherijne ostukeskuse laiendamist. Projekteerijad: Van Berkel & Bos, Neutelings & Riedijk, Alsop & Störmer.Van Berkel & Bos (arhitektibüroo, Holland). Holland Railconsult (projekteerimisbüroo, Utrecht). Alsop & Störmer (arhitektibüroo, London). Neutelings & Riedijk (arhitektibüroo, Rotterdam)

  9. MAA-1, a novel acyl-CoA-binding protein involved in endosomal vesicle transport in Caenorhabditis elegans

    DEFF Research Database (Denmark)

    Larsen, Morten K; Tuck, Simon; Færgeman, Nils J.

    2006-01-01

    The budding and fission of vesicles during membrane trafficking requires many proteins, including those that coat the vesicles, adaptor proteins that recruit components of the coat, and small GTPases that initiate vesicle formation. In addition, vesicle formation in vitro is promoted by the hydro...

  10. Traditional use of the genus Renealmia and Renealmia alpinia (Rottb.) Maas (Zingiberaceae)-a review in the treatment of snakebites.

    Science.gov (United States)

    Gómez-Betancur, Isabel; Benjumea, Dora

    2014-09-01

    Renealmia alpinia (R. alpinia) typically occurs in the tropical rainforests of Mexico to Peru, Brazil through the Antilles, Guyana, Suriname, Colombia and Venezuela. It has traditionally been used against snakebite in Colombia. In addition to the common local use for pain, R. alpinia has been used as an antipyretic and antiemetic to treat wounds, malignant ulcers, epilepsy and fungal infections. The species of the Zingiberaceae family are famous for their use as spices and herbs. This review provides information on the traditional use of plants in the Zingiberaceae family, Renealmia genus, and specifically R. alpinia. We conducted a narrative review in English and Spanish in electronic databases, such as ScienceDirect, Napralert, PubMed, ScFinder, SciElo, during August 2011 to March 2013. We were interested in their applications in ethnomedicine and their chemical components, providing a major and methodical revision. We found 120 sources, 98 of which were selected as they contained essential information. This study has stimulated the development of a new work, which aims to isolate and evaluate metabolites from R. alpinia leads toward the development of a phytotherapeutic product, which might be accessible to the population. Studies on the toxicity and safety of R. alpinia are insufficient to provide information on the ethnomedical use of this species. Thus, the present review summarizes information about R. alpinia and proposes possible scope of future research to fill gaps identified in this narrative review.

  11. Maardu ja Jõelähtme maa alla võib tulla elektrijaam / Erik Müürsepp

    Index Scriptorium Estoniae

    Müürsepp, Erik

    2009-01-01

    OÜ Maardu Graniidikaevandus taotleb graniidikaevanduse luba, ettevõtte juhi Peep Siitami väitel oleks kaeveõõnte hilisem kasutamine pump-hüdroakumulatsioonijaama asukohana parim võimalus kuni 1000 megavati võimsuse ulatuses tuulikuparkide töö ühtlustamiseks

  12. Harry Pye postkaart Londonist : Öö maa peal = Harry Pye's Postcard from London : Night on Earth / Harry Pye

    Index Scriptorium Estoniae

    Pye, Harry, 1973-

    2006-01-01

    Kuraator, kunstnik ja kirjanik Harry Pye kirjeldab Jim Jarmuschi filmist inspireeritud näitust "Night on Earth" Ida-Londonis, endises Viktooria-aegses koolimajas - erinevate inimeste muljed ühest õhtust maakera erinevates paikades koos kunstnike illustratsioonidega

  13. HIF-1-dependent regulation of lifespan in Caenorhabditis elegans by the acyl-CoA-binding protein MAA-1

    DEFF Research Database (Denmark)

    Shamalnasab, Mehrnaz; Dhaoui, Manel; Thondamal, Manjunatha

    2017-01-01

    In yeast, the broadly conserved acyl-CoA-binding protein (ACBP) is a negative regulator of stress resistance and longevity. Here, we have turned to the nematode C. elegans as a model organism in which to determine whether ACBPs play similar roles in multicellular organisms. We systematically...

  14. Zeeland geeft glastuinbouw belangrijke rol in Biopark Terneuzen (Bram van der Maas: "Ontzorgd telen is het uitgangspunt")

    NARCIS (Netherlands)

    Staalduinen, van J.; Maas, van der A.A.

    2008-01-01

    Biopark Terneuzen is een ambitieus plan voor integrale gebiedsontwikkeling, waarin industrie en glastuinbouw centraal staan. De industrie voorziet 160 ha kassen van restwarmte en CO2 wat de milieubelasting vermindert. Het draagvlak voor de plannen is groot en zo'n twintig telers hebben concrete inte

  15. Landschappen van Maas en Peel : een toegepast historisch-geografisch onderzoek in het streekplangebied Noord- en Midden-Limburg

    OpenAIRE

    Renes, J.

    1999-01-01

    SummaryThe theme of this book is use of data on the historic cultural landscape in physical planning. The book contains a general introduction into this subject, as well as a case study: a large survey of the northern and central parts of the Dutch province of Limburg.Structure of the bookThe book consists of five parts. The first, introductory, part presents the contours of the research project, as well as chapters on terminology and on the development of applied historical geography in the ...

  16. Building the Islamic moral self: Sufi Abed's Busta-n Fa-t.imah ma'a ...

    African Journals Online (AJOL)

    when seen as a totality, seek to build the moral self. Keywords: ... testimony to his esteem as a spiritual master. Mayet (42–4) and ..... of all creation that is recorded in the Divine, sacred tablet (lauh. mah.fu-z.) .... In the generation that followed ...

  17. Eesti Maaülikooli spordihoone = The Sports Hall of the Estonian University of Life Sciences / Margit Mutso

    Index Scriptorium Estoniae

    Mutso, Margit, 1966-

    2010-01-01

    Tartus Kreutzwaldi 3 asuva EMÜ spordihoone arhitektuursest lahendusest. Arhitektid: Maarja Kask, Karli Luik, Ralf Lõoke (Salto AB). Sisearhitektid: Katrin Kaevats, Jaan Port (Funk AB). Žürii liikme Kalle Komissarovi hinnang kultuurkapitali aastapreemiale esitatud hoonele

  18. Fluvial sequences of the Maas: a 10 Ma record of neotectonics and climate change at various time-scales.

    NARCIS (Netherlands)

    Berg, van den M.W.

    1996-01-01

    Around 10 million years ago, the interplay of tectonics, climate and sea level changed markedly in the southern North Sea Basin. One of the results was the start of rapid progradation of the Rhine/Meuse delta. The sediments of this basin-filling complex have been preserved in a number of depocentres

  19. Vertebral uptake of Tc-99m macroaggregated albumin (MAA) with SPECT/CT occurring in superior vena cava obstruction

    Energy Technology Data Exchange (ETDEWEB)

    Karls, Shawn; Hassoun, Hani; Derbekyan, Vilma [Dept. of Nuclear Madicine, Royal Victoria Hospital, Montreal (Canada)

    2016-09-15

    A 67-year-old male presented with dyspnea for which lung scintigraphy was ordered to rule out pulmonary embolus. Planar images demonstrated abnormal midline uptake of Tc-99m macroaggregated albumin, which SPECT/CT localized to several thoracic vertebrae. Thoracic vertebral uptake on perfusion lung scintigraphy was previously described on planar imaging. Radionuclide venography and contrast-enhanced CT subsequently demonstrated superior vena cava (SVC) obstruction with collateralization through the azygous/hemiazygous system and vertebral venous plexus. SPECT/CT differentiated residual esophageal/tracheal ventilation activity, a clinically insignificant finding, from vertebral uptake indicative of SVC obstruction, a potentially life-threatening condition.

  20. Power Take-Off with Integrated Resonator for Energy Extraction from Linear Motions

    DEFF Research Database (Denmark)

    2014-01-01

    The invention relates to a magnetic gear for converting linear motion into rotational motion and vice versa. The present invention converts slow linear irregular oscillating motion of wave energy devices into torque on a high speed shaft for powering a generator while making the wave energy device...... of sea or ocean waves into useful energy, such as electricity. The invention relates to the control and operation of a magnetic gear based motor/generator system. The invention provides a high force density electric powered linear actuator....

  1. Design Of Vertical Take-Off And Landing VTOL Aircraft System

    Directory of Open Access Journals (Sweden)

    Win Ko Ko Oo

    2015-08-01

    Full Text Available Vertical Take Off and Landing Vehicles VTOL are the ones which can take off and land from the same place without need of long runway. This paper presents the design and implementation of tricopter mode and aircraft mode for VTOL aircraft system. Firstly the aircraft design is considered for VTOL mode. And then the mathematical model of the VTOL aircraft is applied to test stability. In this research the KK 2.1 flight controller is used for VTOL mode and aircraft mode. The first part is to develop the VTOL mode and the next part is the transition of VTOL mode to aircraft mode. This paper gives brief idea about numerous types of VTOLs and their advantages over traditional aircraftsand insight to various types of tricopter and evaluates their configurations.

  2. STS-76 - SCA 747 Aircraft Takeoff for Delivery to Kennedy Space Center

    Science.gov (United States)

    1996-01-01

    NASA's Boeing 747 Shuttle Carrier Aircraft leaves the runway with the Shuttle Atlantis on its back. Following the STS-76 dawn landing at NASA's Dryden Flight Research Center, Edwards, California, on 31 March 1996. NASA 905, one of two modified 747's, was prepared to ferry Atlantis back to the Kennedy Space Center, FL. Delivery of Altlantis to Florida was delayed until 11 April 1996, due to an engine warning light that appeared shortly after take off on 6 April. The SCA #905 returned to Edwards with Atlantis aboard only minutes after departure. The right inboard engine #3 was exchanged and the 747 with Atlantis atop was able to depart for Davis-Monthan Air Force Base for a refueling stop. Space Shuttles are the main element of America's Space Transportation System and are used for space research and other space applications. The shuttles are the first vehicles capable of being launched into space and returning to Earth on a routine basis. Space Shuttles are used as orbiting laboratories in which scientists and mission specialists conduct a wide variety of scientific experiments. Crews aboard shuttles place satellites in orbit, rendezvous with satellites to carry out repair missions and return them to space, and retrieve satellites and return them to Earth for refurbishment and reuse. Space Shuttles are true aerospace vehicles. They leave Earth and its atmosphere under rocket power provided by three liquid-propellant main engines with two solid-propellant boosters attached plus an external liquid-fuel tank. After their orbital missions, they streak back through the atmosphere and land like airplanes. The returning shuttles, however, land like gliders, without power and on runways. Other rockets can place heavy payloads into orbit, but, they can only be used once. Space Shuttles are designed to be continually reused. When Space Shuttles are used to transport complete scientific laboratories into space, the laboratories remain inside the payload bay throughout the mission. They are then removed after the Space Shuttle returns to Earth and can be reused on future flights. Some of these orbital laboratories, like the Spacelab, provide facilities for several specialists to conduct experiments in such fields as medicine, astronomy, and materials manufacturing. Some types of satellites deployed by Space Shuttles include those involved in environmental and resources protection, astronomy, weather forecasting, navigation, oceanographic studies, and other scientific fields. The Space Shuttles can also launch spacecraft into orbits higher than the Shuttle's altitude limit through the use of Inertial Upper Stage (IUS) propulsion units. After release from the Space Shuttle payload bay, the IUS is ignited to carry the spacecraft into deep space. The Space Shuttles are also being used to carry elements of the International Space Station into space where they are assembled in orbit. The Space Shuttles were built by Rockwell International's Space Transportation Systems Division, Downey, California. Rockwell's Rocketdyne Division (now part of Boeing) builds the three main engines, and Thiokol, Brigham City, Utah, makes the solid rocket booster motors. Martin Marietta Corporation (now Lockheed Martin), New Orleans, Louisiana, makes the external tanks. Each orbiter (Space Shuttle) is 121 feet long, has a wingspan of 78 feet, and a height of 57 feet. The Space Shuttle is approximately the size of a DC-9 commercial airliner and can carry a payload of 65,000 pounds into orbit. The payload bay is 60 feet long and 15 feet in diameter. Each main engine is capable of producing a sea level thrust of 375,000 pounds and a vacuum (orbital) thrust of 470,000 pounds. The engines burn a mixture of liquid oxygen and liquid hydrogen. In orbit, the Space Shuttles circle the earth at a speed of 17,500 miles per hour with each orbit taking about 90 minutes. A Space Shuttle crew sees a sunrise or sunset every 45 minutes. When Space Shuttle flights began in April 1981, Dryden Flight Research Center, Edwards, California, was the primary landing site for the Shuttles. Now Kennedy Space Center, Florida, is the primary landing site with Dryden remaining as the principal alternate landing site.

  3. A concept set for take-off? Lightweight idea may be heavyweight transportation solution

    Energy Technology Data Exchange (ETDEWEB)

    Bentein, J.

    2004-12-01

    This paper described the use of airships in changing the bulk transport business. Mercatus Ventures Inc. is working with Ontario-based 21st Century Airships Inc. on developing a heavy lift spherical airship that could replace the need for roads to remote oil and gas mining development sites. Airships would be particularly useful in Canada's North where bulk products cannot be transported outside of ice road season. Transportation accounts for 60 per cent of the cost of drilling a natural gas well in areas that lack all-weather road access. In addition to being environmentally sound, a $10 million or $20 million airship could save companies many millions of dollars in transportation costs. The design of the 21st Century models can be readily adapted to carry heavy loads. A prototype is currently under development to carry 20 to 40 tonnes of equipment including coil tubing rigs and parts of drilling platforms to remote work locations. The Century 21st spherical airship is equipped with panoramic windows and a glass bottom floor and can also be used for high altitude communications and surveillance. Test flights have sailed at altitudes of 6,234 meters. An unmanned version is under development to soar up to 20,000 meters, well above problematic weather systems. An airship equipped with fuel cells and solar panels can stay aloft for more than a year at that level. New airship models use non-flammable helium to support the ship's weight. 1 ref., 4 figs.

  4. Visual Confirmation of Voice Takeoff Clearance (VICON) Operational Evaluation. Volume I.

    Science.gov (United States)

    1981-02-01

    William Petruzel, ARD-110. The FAA Technical Center Program Manager was Mr. Felix F. Hierbaum, Jr., ACT-210. Appreciation is expressed to Mr. Donald G...to 200,000 candela . It also of Bradley International where decreased the beam width from 50* to 120 briefings, posters, and questionnaires in the

  5. Communities ready for takeoffIntegrating social assets for biofuel site-selection modeling.

    Science.gov (United States)

    Rijkhoff, Sanne A M; Hoard, Season A; Gaffney, Michael J; Smith, Paul M

    2017-01-01

    Although much of the social science literature supports the importance of community assets for success in many policy areas, these assets are often overlooked when selecting communities for new infrastructure facilities. Extensive collaboration is crucial for the success of environmental and economic projects, yet it often is not adequately addressed when making siting decisions for new projects. This article develops a social asset framework that includes social, creative, and human capital to inform site-selection decisions. This framework is applied to the Northwest Advanced Renewables Alliance project to assess community suitability for biofuel-related developments. This framework is the first to take all necessary community assets into account, providing insight into successful site selection beyond current models. The framework not only serves as a model for future biorefinery projects but also guides tasks that depend on informed location selection for success.

  6. 77 FR 51894 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-08-28

    ..., NJ, Trenton Mercer, VOR OR GPS RWY 24, Amdt 4B, CANCELED Albuquerque, NM, Albuquerque Intl Sunport, RNAV (GPS) Y RWY 3, Orig-B Albuquerque, NM, Albuquerque Intl Sunport, RNAV (GPS) Y RWY 8, Orig-A Albuquerque, NM, Albuquerque Intl Sunport, RNAV (RNP) Y RWY 21, Orig Albuquerque, NM, Albuquerque Intl...

  7. 75 FR 80680 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-12-23

    ... Airport FDC No. FDC Date Subject 13 Jan-11 IN La Porte La Porte Muni...... 0/7781 11/22/10 VOR A, Amdt 7A. 13 Jan-11 IN La Porte La Porte Muni...... 0/7782 11/22/10 RNAV (GPS) RWY 2, Orig-A. 13 Jan-11 IN La Porte La Porte Muni...... 0/7783 11/22/10 LOC/NDB RWY 2, Amdt 1A. 13 Jan-11 WI...

  8. 75 FR 5232 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-02-02

    ........... 0/0393 1/7/10 RNAV (GPS) Rwy 24, Amdt 1. 11-Mar-10 IN La Porte La Porte Muni......... 0/0656 1/8/10 RNAV (GPS) Rwy 2, Orig. 11-Mar-10 IN La Porte La Porte Muni......... 0/0657 1/8/10 LOC/NDB Rwy 2, Amdt 1. 11-Mar-10 IN La Porte La Porte Muni......... 0/0658 1/8/10 VOR-A, Amdt 7. 11-Mar-10 IL...

  9. 78 FR 32088 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-05-29

    ... Minimums and Obstacle DP, Amdt 2 Starkville, MS, George M Bryan, RNAV (GPS) RWY 36, Amdt 3A Dillon, MT..., Syracuse Hancock Intl, RNAV (RNP) Y RWY 28, Orig Redmond, OR, Roberts Field, ILS OR LOC/DME RWY 22, Amdt 3...

  10. 76 FR 8288 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-02-14

    ..., and VOR/DME or TACAN; Sec. 97.25 LOC, LOC/DME, LDA, LDA/DME, SDF, SDF/DME; Sec. 97.27 NDB, NDB/DME... County....... 1/2665 1/26/11 SDF RWY 23, Amdt 2A 10-Mar-11 KY Campbellsville...... Taylor County..........

  11. 76 FR 78810 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-12-20

    ... ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV SIAPs; and Sec. 97.35....... 1/3411 12/1/11 ILS OR LOC RWY 24, ILS RWY 24 (SA CAT I), ILS RWY 24 (SA CAT II), Amdt 12. 12-Jan-12......... TN Memphis......... Memphis Intl.... 1/4441 12/1/11 ILS OR LOC RWY 36L, ILS RWY 36L (CAT II), ILS...

  12. 76 FR 77113 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-12-12

    ..., SDF/DME; Sec. 97.27 NDB, NDB/DME; Sec. 97.29 ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR.../2074 11/9/11 ILS OR LOC RWY 20, Amdt 4A. 12-Jan-12 DC Washington Washington 1/2075 11/9/11 RNAV (RNP) Z........ 1/2597 11/9/11 ILS OR LOC RWY 1L, ILS RWY 1L (SA CAT I), ILS RWY 1L (CAT II), ILS RWY 1L (CAT...

  13. 75 FR 54766 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-09-09

    ..., Metropolitan Oakland Intl, ILS OR LOC RWY 11, Amdt 6 Oakland, CA, Metropolitan Oakland Intl, RNAV (GPS) Y RWY... RWY 35R, Orig Denver, CO, Denver Intl, ILS OR LOC RWY 34L, ILS RWY 34L (CAT II), ILS RWY 34L (CAT III), Amdt 1 Denver, CO, Denver Intl, ILS OR LOC RWY 34R, ILS RWY 34R (CAT II), ILS RWY 34R (CAT III), Amdt...

  14. 76 FR 21232 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-04-15

    ... Fairhope, AL, H L Sonny Callahan, VOR/DME-A, Amdt 7 Gulf Shores, AL, Jack Edwards, ILS OR LOC RWY 27, Amdt...) RWY 27, Amdt 2 Montgomery, AL, Montgomery Rgnl (Dannelly Field), ILS OR LOC RWY 28, Amdt 10 Montgomery..., Hartsfield-Jackson Atlanta Intl, ILS OR LOC RWY 10, ILS RWY 10 (SA CAT I), ILS RWY 10 (CAT II), ILS RWY...

  15. 75 FR 45049 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-08-02

    ...; Sec. 97.25 LOC, LOC/DME, LDA, LDA/DME, SDF, SDF/DME; Sec. 97.27 NDB, NDB/DME; Sec. 97.29 ILS, ILS/DME.../10 ILS OR LOC RWY 6, AMDT 29D 26-Aug-10 KY LONDON LONDON-CORBIN ARPT- 0/1641 6/28/10 ILS OR LOC RWY 6...-10 PA ERIE ERIE INTL/TOM RIDGE 0/5381 6/28/10 ILS OR LOC RWY 6, AMDT 16 FIELD. 26-Aug-10 MA...

  16. 76 FR 6050 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-02-03

    ....27 NDB, NDB/DME; Sec. 97.29 ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33... ILS OR LOC RWY 4, Amdt 1 Rgnl. 10-Mar-11 NC Goldsboro Goldsboro-Wayne Muni 0/3173 1/3/11 RNAV (GPS... ILS OR LOC RWY 17C, ILS RWY 17C (CAT II), Intl. ILS RWY 17C (CAT III), Amdt 9 10-Mar-11 TX...

  17. 77 FR 62429 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-10-15

    ..., Metropolitan Oakland Intl, ILS OR LOC RWY 29, ILS RWY 29 (SA CAT I), ILS RWY 29 (CAT II), ILS RWY 29 (CAT III... 35R, Amdt 1 Denver, CO, Centennial, RNAV (GPS) Z RWY 35R, Orig Denver, CO, Denver Intl, ILS OR LOC RWY 35L, ILS RWY 35L (CAT II), ILS RWY 35L (CAT III), ILS RWY 35L (SA CAT I), Amdt 5 Denver, CO,...

  18. 76 FR 11944 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-03-04

    .... 97.29 ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV SIAPs; and Sec... (GPS) RWY 3, Orig 7-Apr-11 IL Chicago Chicago-O'Hare Intl. 0/7506 2/7/11 ILS OR LOC RWY 9L, ILS RWY 9L (CAT II), ILS RWY 9L (CAT III), Orig-B 7-Apr-11 NE Nebraska City....... Nebraska City Muni.. 0/8316...

  19. 77 FR 22477 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-04-16

    ... ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV SIAPs; and Sec. 97.35...) RWY Intl. 34R, Amdt 1 3-May-12 MS Jackson......... Jackson-Evers 2/2513 3/19/12 ILS OR LOC RWY Intl.../4557 3/19/12 ILS OR LOC RWY Intl--Carl T 18R, ILS RWY Jones Field. 18R (CAT II), Amdt 24B 3-May-12...

  20. 77 FR 59735 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-10-01

    ... Denver, CO, Denver Intl, ILS OR LOC RWY 7, Amdt 3 Denver, CO, Denver Intl, ILS OR LOC RWY 8, Amdt 5 Denver, CO, Denver Intl, ILS OR LOC RWY 16L, Amdt 3 Denver, CO, Denver Intl, ILS OR LOC RWY 16R, Amdt 1 Denver, CO, Denver Intl, ILS OR LOC RWY 17L, Amdt 4 Denver, CO, Denver Intl, ILS OR LOC RWY 17R, Amdt...

  1. 77 FR 33087 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-06-05

    ... July 2012 Bethel, AK, Bethel, ILS OR LOC/DME Z RWY 19R, Amdt 7A Fairbanks, AK, Fairbanks Intl, ILS OR LOC RWY 2L, ILS RWY 2L (SA CAT I), ILS RWY 2L (CAT II), ILS RWY 2L (CAT III), Amdt 9 Auburn, AL, Auburn University Rgnl, ILS OR LOC RWY 36, Amdt 2 Auburn, AL, Auburn University Rgnl, RNAV (GPS) RWY...

  2. 77 FR 15577 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-03-16

    ..., SDF/DME; Sec. 97.27 NDB, NDB/DME; Sec. 97.29 ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR.../0280 2/23/12 ILS RWY 23, ILS Kingsport. Cities Rgnl. RWY 23 (CAT II), Amdt 24D. 5-Apr-12 AK Soldotna... 2A. 5-Apr-12 MO St Louis........ Lambert-St Louis 2/2720 2/27/12 ILS OR LOC RWY Intl. 11, ILS RWY...

  3. 77 FR 41666 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-07-16

    .... 97.29 ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV SIAPs; and Sec... State.. 2/2176 6/18/12 ILS OR LOC RWY 16, Amdt 10A 26-Jul-12 RI North Kingstown. Quonset State.. 2/2177........ Los Angeles 2/4270 6/18/12 ILS OR LOC RWY Intl. 25L, Amdt 12, ILS RWY 25L (CAT II), Amdt 12, ILS...

  4. 77 FR 24371 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-04-24

    ... ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV ] SIAPs; and Sec. 97.35... GA Atlanta Fulton County 2/0684 4/10/12 ILS OR LOC RWY 8, Amdt 16A. Airport-Brown Field. 31-May-12 GA... Charlotte/Douglas 2/0925 4/10/12 ILS OR LOC RWY 18R, ILS RWY 18R (CAT II), Intl. ILS RWY 18R (CAT III),...

  5. 76 FR 61038 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-10-03

    ... 2011 West Memphis, AR, West Memphis Muni, ILS OR LOC RWY 17, Amdt 5 Windsor Locks, CT, Bradley Intl, ILS OR LOC RWY 6, ILS RWY 6 (SA CAT I), ILS RWY 6 (CAT II), ILS RWY 6 (CAT III), Amdt 37 Windsor Locks, CT, Bradley Intl, ILS OR LOC RWY 24, ILS RWY 24 (SA CAT I), ILS RWY 24 (SA CAT II), Amdt 12...

  6. 78 FR 34559 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-06-10

    ... Chicago, IL, Chicago Midway Intl, ILS OR LOC/DME RWY 31C, Amdt 2 Chicago, IL, Chicago Midway Intl, RNAV... County, ILS PRM RWY 3R, ILS PRM RWY 3R (CAT II), ILS PRM RWY 3R (CAT III) (SIMULTANEOUS CLOSE PARALLEL), Orig-C Detroit, MI, Detroit Metropolitan Wayne County, ILS PRM RWY 4R, ILS PRM RWY 4R (CAT II), ILS...

  7. 76 FR 72615 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-11-25

    ..., RNAV (GPS) RWY 27, Amdt 1 Jacksonville, FL, Jacksonville Intl, ILS OR LOC RWY 8, ILS RWY 8 (SA CAT I), ILS RWY 8 (CAT II), ILS RWY 8 (CAT III), Amdt 13 Jacksonville, FL, Jacksonville Intl, ILS OR LOC RWY 14, Amdt 7 Jacksonville, FL, Jacksonville Intl, ILS OR LOC RWY 26, Amdt 2 Jacksonville,...

  8. 77 FR 3098 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-01-23

    ..., NDB/DME; Sec. 97.29 ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV... ILS OR LOC RWY 5L, ILS RWY 5L (CAT II), ILS RWY 5L (CAT III), Orig 9-Feb-12 NC Greensboro Piedmont Triad Intl. 1/0286 12/9/11 ILS OR LOC RWY 23R, Orig 9-Feb-12 WI Madison Blackhawk Airfield.. 1/0691...

  9. 76 FR 78812 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-12-20

    ..., Orig Independence, KS, Independence Muni, ILS OR LOC RWY 35, Amdt 1A Olathe, KS, Johnson County..., ILS OR LOC RWY 10R, ILS RWY 10R (SA CAT I), ILS RWY 10R (CAT II), ILS RWY 10R (CAT III), Amdt 34... Intl, ILS OR LOC/DME RWY 7L, ILS RWY 7L (SA CAT I), ILS RWY 7L (CAT II), Amdt 2 Anchorage, AK,...

  10. 78 FR 59810 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-09-30

    ... ILS, ILS/DME, MLS, MLS/DME, MLS/RNAV; Sec. 97.31 RADAR SIAPs; Sec. 97.33 RNAV SIAPs; and Sec. 97.35......... 3/1006 8/29/13 ILS OR LOC RWY 29, Amdt 1A 10/17/13 CA Half Moon Bay....... Half Moon Bay....... 3..., Amdt 4A 10/17/13 WA Bellingham Bellingham Intl..... 3/2757 9/10/13 ILS OR LOC RWY 16, ILS RWY 16...

  11. 78 FR 21239 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-04-10

    ...) RWY 30, Amdt 1 Atlanta, GA, Hartsfield--Jackson Atlanta Intl, ILS OR LOC RWY 8L, ILS RWY 8L (SA CAT I), ILS RWY 8L (CAT II), ILS RWY 8L (CAT III), Amdt 4 Atlanta, GA, Hartsfield--Jackson Atlanta Intl, ILS OR LOC RWY 8R, Amdt 60 Atlanta, GA, Hartsfield--Jackson Atlanta Intl, ILS OR LOC RWY 9L, Amdt...

  12. 75 FR 39150 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-07-08

    ... 33, Orig 29-Jul-10....... IN North Vernon........ North Vernon 0/2108 6/4/10 RNAV (GPS) Z Rwy 23... Selawik 0/2192 6/7/10 RNAV (GPS) Z Rwy 22, Orig-A. 29-Jul-10....... KY Somerset Lake Cumberland Rgnl......

  13. 75 FR 25760 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-05-10

    ... Muni, VOR/DME-B, Amdt 4 Newburgh, NY, Steward Intl, ILS OR LOC RWY 27, Amdt 1 Newburgh, NY, Steward Intl, RNAV (GPS) RWY 9, Amdt 1 Newburgh, NY, Steward Intl, RNAV (GPS) RWY 27, Amdt 1 Newburgh, NY, Steward Intl, VOR RWY 27, Amdt 5 Rome, NY, Griffiss Intl, ILS RWY 15, Orig-A, CANCELLED Rome, NY,...

  14. 78 FR 40383 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-07-05

    ...). Issued in Washington, DC, on June 21, 2013. John M. Allen, Director, Flight Standards Service. Adoption..., Lafayette Rgnl, VOR/DME RWY 11, Amdt 1E Holland, MI, West Michigan Rgnl, ILS OR LOC/DME RWY 26, Amdt 2A...

  15. 76 FR 35098 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-06-16

    ... Federal Register expensive and impractical. Further, airmen do not use the regulatory text of the SIAPs... a regulatory evaluation as the anticipated impact is so minimal. For the same reason, the FAA... Corpus Christi...... Corpus Christi Intl. 1/9809 5/6/11 RNAV (RNP) Z RWY 13, Orig 30-Jun-11 TX...

  16. 77 FR 71497 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-12-03

    ... Register expensive and impractical. Furthermore, airmen do not use the regulatory text of the SIAPs... warrant preparation of a regulatory evaluation as the anticipated impact is so minimal. For the same... RWY 33, Amdt 2 Rome, NY, Griffiss Intl, RNAV (GPS) RWY 33, Amdt 2 Corpus Christi, TX, Corpus...

  17. "Slowed Rotor/Compound" Vertical Takeoff and Landing Personal Air Vehicle Project

    Data.gov (United States)

    National Aeronautics and Space Administration — slowed rotor / compound (SL/C) aircraft offer VTOL combined with fixed-wing flight-efficiencies. They are safer than any other type aircraft -- with much lower...

  18. 78 FR 14010 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-03-04

    ...-Chippewa County, VOR RWY 14, Amdt 5 Cleveland, OH, Cleveland-Hopkins Intl, ILS PRM RWY 6L, Orig-D, CANCELED Cleveland, OH, Cleveland-Hopkins Intl, ILS PRM RWY 24R, Amdt 1, CANCELED Cleveland, OH, Cleveland-Hopkins Intl, LDA PRM RWY 6R, Amdt 1C, CANCELED Cleveland, OH, Cleveland-Hopkins Intl, LDA PRM RWY 24L,...

  19. 78 FR 48800 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-08-12

    ..., Amdt 7A St Louis, MO, Lambert-St Louis Intl, ILS PRM RWY 11, ILS PRM RWY 11 (CAT II), ILS PRM RWY 11 (CAT III) (SIMULTANEOUS CLOSE PARALLEL), Orig-C, CANCELED St Louis, MO, Lambert-St Louis Intl, ILS PRM RWY 12L, ILS PRM RWY 12L (CAT II), ILS PRM RWY 12L (CAT III) (SIMULTANEOUS CLOSE PARALLEL), Amdt...

  20. 78 FR 54564 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-09-05

    ..., Hartsfield-Jackson Atlanta Intl, ILS PRM RWY 8L, ILS PRM RWY 8L (SA CAT I), ILS PRM RWY 8L (CAT II), ILS PRM..., ILS PRM RWY 28, ILS PRM RWY 28 (SA CAT I), ILS PRM RWY 28 (CAT II) (SIMULTANEOUS CLOSE PARALLEL),...

  1. 76 FR 4064 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-01-24

    ... PRM RWY 11 (Sim. Close Parallel), Orig- Intl. B; ILS PRM RWY 11 (CAT II) (Sim Close Parallel), Orig-B; ILS PRM RWY 11 (CAT III) (Sim Close Parallel), Orig-B. 10-Feb-11 MO St Louis Lambert-St Louis 0/2655 12/23/10 ILS PRM RWY 12L (Sim. Close Parallel), Amdt Intl. 1; ILS PRM RWY 12L (CAT II) (Sim...

  2. 77 FR 3100 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-01-23

    ... Aiken, SC, Aiken Muni, ILS OR LOC/DME RWY 7, Orig Aiken, SC, Aiken Muni, LOC RWY 7, Orig, CANCELLED Aiken, SC, Aiken Muni, RNAV (GPS) RWY 7, Amdt 1 Aiken, SC, Aiken Muni, RNAV (GPS) RWY 25, Amdt 1...

  3. Preparing Beginning Teachers for Technology Integration in Education: Ready for Take-Off?

    Science.gov (United States)

    Tondeur, Jo; Pareja Roblin, Natalie; van Braak, Johan; Voogt, Joke; Prestridge, Sarah

    2017-01-01

    The overall aims of this study are to explore (1) how beginning teachers integrate technology in their practice and (2) the connections between teachers' technology uses and their pre-service education programmes. Data of this follow-up study were collected through in-depth interviews with beginning teachers. The results reveal that all beginning…

  4. 75 FR 35627 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-06-23

    ... Honolulu Intl....... 0/2769 5/27/10 RNAV (RNP) Z RWY 8L, ORIG. 29-Jul-10 TX San Angelo San Angelo Regional/ 0/2779 6/8/10 VOR/DME OR TACAN RWY 3, ORIG-A. Mathis Fld. 29-Jul-10 TX San Angelo San Angelo Regional/ 0/2780 6/8/10 RADAR-1, AMDT 1. Mathis Fld. 29-Jul-10 TX San Angelo San Angelo Regional/ 0/2781...

  5. 78 FR 18803 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-03-28

    .... 2-May-13 MI Iron Mountain Ford 3/9905 3/4/2013 RNAV (GPS) RWY 1, Orig. Kingsford. 2-May-13 MI Iron Mountain Ford 3/9906 3/4/2013 RNAV (GPS) RWY 19, Orig. Kingsford. 2-May-13 MI Iron Mountain Ford 3/9907 3/4/2013 LOC/DME BC RWY 19, Amdt 13. Kingsford. 2-May-13 MI Iron Mountain Ford 3/9908 3/4/2013 ILS OR LOC...

  6. Gyroscopic power take-off wave energy point absorber in irregular sea states

    DEFF Research Database (Denmark)

    Zhang, Zili; Chen, Bei; Nielsen, Søren R.K.

    2017-01-01

    Highlights •A GyroPTO wave energy point absorber with magnetic coupling mechanism is proposed. •A 4DOF nonlinear model of the GyroPTO absorber has been derived. •Rational approximations are performed on the radiation damping moments. •Synchronization of the device is more easily maintained in nar...... in narrow-banded sea waves. •The generator gain and the magnetic coupling constant influence the performance of the device....

  7. Model based design of efficient power take-off systems for wave energy converters

    DEFF Research Database (Denmark)

    Hansen, Rico Hjerm; Andersen, Torben Ole; Pedersen, Henrik C.

    2011-01-01

    an essential part of the PTO, being the only technology having the required force densities. The focus of this paper is to show the achievable efficiency of a PTO system based on a conventional hydro-static transmission topology. The design is performed using a model based approach. Generic component models...

  8. Bamboo and Poison Gas: Take-Off Points for Developing Skills.

    Science.gov (United States)

    Hantula, James

    1986-01-01

    Shows how to use common topics within area studies to develop important social studies skills. The example provided illustrates how to develop data analysis, data evaluation, problem solving, and map skills using the topics of bamboo and the Bhopal, India, chemical disaster. (JDH)

  9. Targeting and timing promotional activities : An agent-based model for the takeoff of new products

    NARCIS (Netherlands)

    Delre, S. A.; Jager, W.; Bijmolt, T. H. A.; Janssen, M. A.

    2007-01-01

    Many marketing efforts focus on promotional activities that support the launch of new products. Promotional strategies may play a crucial role in the early stages of the product life cycle, and determine to a large extent the diffusion of a new product. This paper proposes an agent-based model to si

  10. 75 FR 9098 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-03-01

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... OK ENID ENID WOODRING RGNL. 0/2569 2/3/10 RNAV (GPS) RWY 35, ORIG. 8-Apr-10 OK ENID ENID WOODRING... VOR OR GPS A, ORIG-B. 8-Apr-10 FL NAPLES NAPLES MUNI........ 0/2858 2/4/10 VOR RWY 23, AMDT 6C. 8-Apr...

  11. 76 FR 64006 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-10-17

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... NDB A, Amdt 1 17-Nov-11 UT Brigham City....... Brigham City...... 1/0188 9/23/11 RNAV (GPS) RWY 35... RWY 24L, Orig-D 17-Nov-11 NY Rochester Greater Rochester 1/0596 9/21/11 RNAV (GPS) RWY 28, Amdt 1A...

  12. 75 FR 80682 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-12-23

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations..., Amdt 2 Yakutat, AK, Yakutat, LOC/DME BC RWY 29, Amdt 6 Yakutat, AK, Yakutat, RNAV (GPS) RWY 2, Amdt 2 Yakutat, AK, Yakutat, RNAV (GPS) RWY 11, Amdt 3 Yakutat, AK, Yakutat, RNAV (GPS) RWY 29, Amdt 3 Yakutat...

  13. 77 FR 26667 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-05-07

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... Intl. 31-May-12 MO Columbia Columbia Rgnl....... 2/1214 4/20/12 RNAV (GPS) RWY 31, Orig 31-May-12 AK... Mankato Rgnl........ 2/1869 4/20/12 RNAV (GPS) RWY 22, Orig 31-May-12 TN Memphis Memphis Intl........ 2...

  14. 75 FR 9095 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-03-01

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... 2010 Atka, AK, Atka, GPS-A, Orig, CANCELLED Atka, AK, Atka, RNAV (GPS)-A, Orig Brewton, AL, Brewton..., Montgomery Field, ILS OR LOC RWY 28R, Amdt 4 San Diego, CA, Montgomery Field, RNAV (GPS) RWY 28R, Amdt 1...

  15. 76 FR 18381 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-04-04

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... No. FDC date Subject 5-May-11...... KS Iola Allen County... 0/2223 3/1/11 RNAV (GPS) RWY 19, Orig 5-May-11...... MA Marshfield Marshfield Muni- 1/0112 3/9/11 RNAV (GPS) RWY George Harlow 6, Orig Field...

  16. 78 FR 21242 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-04-10

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... No. FDC Date Subject 2-May-13 TX Waco McGregor Executive. 3/2024 03/15/13 RNAV (GPS) RWY 35, Amdt 1 2-May-13 TX Waco McGregor Executive. 3/2029 03/15/13 RNAV (GPS) RWY 17, Amdt 1 2-May-13 MA Marshfield...

  17. 75 FR 4488 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-01-28

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... Executive, GPS RWY 4, Orig-A, CANCELLED Avon Park, FL, Avon Park Executive, GPS RWY 9, Orig-A, CANCELLED Avon Park, FL, Avon Park Executive, RNAV (GPS) RWY 5, Orig Avon Park, FL, Avon Park Executive, RNAV...

  18. 75 FR 19541 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-04-15

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... Obstacle DP, Orig Red Oak, IA, Red Oak Muni, NDB RWY 17, Amdt 9 Flora, IL, Flora Muni, RNAV (GPS) RWY 21..., Mount Carmel Muni, NDB OR GPS RWY 4, Amdt 5, CANCELLED Mount Carmel, IL, Mount Carmel Muni, VOR RWY 22...

  19. 75 FR 35629 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-06-23

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations..., Amdt 1 Dothan, AL, Dothan Rgnl, RNAV (GPS) RWY 18, Amdt 1 Dothan, AL, Dothan Rgnl, RNAV (GPS) RWY 36... RWY 2, Orig, CANCELLED Flagstaff, AZ, Flagstaff Pulliam, GPS RWY 3, Orig-B, CANCELLED Flagstaff, AZ...

  20. 77 FR 42627 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-07-20

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe..., RNAV (GPS) RWY 25, Amdt 1A Tompkinsville, KY, Tompkinsville-Monroe County, RNAV (GPS) RWY 4, Orig-A Gaithersburg, MD, Montgomery County Airpark, RNAV (GPS) RWY 14, Amdt 3A Detroit/Grosse Ile, MI, Grosse Ile Muni...

  1. 76 FR 18379 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-04-04

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... 2011 Deadhorse, AK, Deadhorse, RNAV (GPS) Y RWY 5, Amdt 1B Deadhorse, AK, Deadhorse, RNAV (GPS) Y RWY..., Northwest Arkansas Rgnl, RNAV (GPS) RWY 17, Orig Fayetteville/Springdale, AR, Northwest Arkansas Rgnl, RNAV...

  2. 75 FR 22215 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-04-28

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... 2010 Kotzebue, AK, Ralph Wien Memorial, RNAV (GPS) RWY 9, Amdt 2 Alexander City, AL, Thomas C Russell Fld, NDB-A, Amdt 2 Alexander City, AL, Thomas C Russell Fld, RNAV (GPS) RWY 18, Orig Alexander City...

  3. 75 FR 21983 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-04-27

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations... 2010 Smithfield, NC, Johnston County, NDB OR GPS RWY 21, Amdt 6, CANCELLED Montgomery, NY, Orange County, ILS OR LOC RWY 3, Amdt 3A Montgomery, NY, Orange County, RNAV (GPS) RWY 26, Amdt 1A Mount...

  4. 77 FR 12454 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-03-01

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... Airport FDC No. FDC date Subject 5-Apr-12 WY Torrington Torrington Muni...... 1/0250 2/6/12 GPS RWY 10, Orig-A 5-Apr-12 WY Torrington Torrington Muni...... 1/0251 2/6/12 GPS RWY 28, Orig-A 5-Apr-12 VA Orange...

  5. 77 FR 15576 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-03-16

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe..., Bethel, ILS OR LOC/DME Z RWY 19R, Amdt 7 Bethel, AK, Bethel, RNAV (GPS) RWY 19R, Amdt 2 Jasper, AL, Walker County-Bevill Field, RNAV (GPS) RWY 9, Orig Scottsdale, AZ, Scottsdale, RNAV (GPS)-D, Amdt 1...

  6. 78 FR 59808 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-09-30

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe..., Homer, LOC/DME RWY 4, Amdt 10 Kaltag, AK, Kaltag, RNAV (GPS) RWY 3, Orig-B Kiana, AK, Bob Baker Memorial, RNAV (GPS) RWY 6, Orig-A Nome, AK, Nome, RNAV (GPS) RWY 10, Amdt 1 Nome, AK, Nome, RNAV (GPS) RWY 28...

  7. 76 FR 35101 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-06-16

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations..., ILS or LOC/DME RWY 3, Orig Talladega, AL, Talladega Muni, RNAV (GPS) RWY 3, Amdt 1 Talladega, AL, Talladega Muni, RNAV (GPS) RWY 21, Amdt 1 Telluride, CO, Telluride Rgnl, LOC/DME RWY 9, Amdt 2 Telluride, CO...

  8. 78 FR 7652 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-02-04

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... No. FDC Date Subject 7-Mar-13 MI Detroit Coleman A. Young 2/7262 01/11/13 RNAV (GPS) RWY 33, Orig Muni. 7-Mar-13 TX Graford Possum Kingdom...... 3/0511 01/11/13 RNAV (GPS) RWY 20, Orig 7-Mar-13 TX...

  9. 77 FR 41668 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2012-07-16

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe..., DE, Delaware Airpark, RNAV (GPS) RWY 9, Amdt 2 Dover/Cheswold, DE, Delaware Airpark, RNAV (GPS) RWY... Pensacola, FL, Pensacola Gulf Coast Rgnl, RNAV (GPS) RWY 8, Amdt 2 Pensacola, FL, Pensacola Gulf Coast Rgnl...

  10. 78 FR 48797 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-08-12

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe... 8/22/13 OR John Day Grant Co Rgnl/ 3/1041 7/16/13 RNAV (GPS) Z Rwy 9, Orig-A Ogilvie Field. 8/22/13 OR John Day Grant Co Rgnl/ 3/1042 7/16/13 RNAV (GPS) Y Rwy 9, Orig-A Ogilvie Field. 8/22/13 CA Blythe...

  11. 75 FR 69332 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-11-12

    ... to provide safe and efficient use of the navigable airspace and to promote safe flight operations........ 0/0737 10/15/10 RNAV (GPS) Rwy 36, Orig. 16-Dec-10 IA Bloomfield Bloomfield Muni..... 0/0738 10/15/10 NDB Rwy 36, Amdt 3. 16-Dec-10 NE Fremont Fremont Muni........ 0/0741 10/15/10 RNAV (GPS) Rwy 14...

  12. 78 FR 56830 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2013-09-16

    ... changes are designed to provide safe and efficient use of the navigable airspace and to promote safe...: Effective 17 OCTOBER 2013 Cold Bay, AK, Cold Bay, RNAV (GPS) RWY 26, Amdt 2 Coldfoot, AK, Coldfoot, RNAV (GPS) RWY 1, Amdt 1A Ruby, AK, Ruby, RNAV (GPS) RWY 3, Amdt 1A Scottsboro, AL, Scottsboro Muni-Word...

  13. Power Take-Off with Integrated Resonator for Energy Extraction from Linear Motions

    DEFF Research Database (Denmark)

    2014-01-01

    The invention relates to a magnetic gear for converting linear motion into rotational motion and vice versa. The present invention converts slow linear irregular oscillating motion of wave energy devices into torque on a high speed shaft for powering a generator while making the wave energy device...... of sea or ocean waves into useful energy, such as electricity. The invention relates to the control and operation of a magnetic gear based motor/generator system. The invention provides a high force density electric powered linear actuator....... resonate with the waves. The invention relates to the field of energy-harvesting from energy sources, where the energy-harvesting requires the extraction of energy from slow and often irregular reciprocating motion of bodies. The present invention relates to a wave power apparatus for converting power...

  14. 75 FR 915 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-01-07

    ... Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA-200), FAA Headquarters... specified, as follows: PART 97--STANDARD INSTRUMENT APPROACH PROCEDURES 0 1. The authority citation for...

  15. 75 FR 54769 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2010-09-09

    ... Minimums and ODP copies may be obtained from: 1. FAA Public Inquiry Center (APA-200), FAA Headquarters... specified, as follows: PART 97--STANDARD INSTRUMENT APPROACH PROCEDURES 0 1. The authority citation for...

  16. 76 FR 40600 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-07-11

    ..., Amdt 1 Harvey, ND, Harvey Muni, RNAV (GPS) RWY 29, Orig-A Eastland, TX, Eastland Muni, RNAV (GPS) RWY..., David Wayne Hooks Memorial, LOC RWY 17R, Amdt 2 Lockhart, TX, Lockhart Muni, GPS RWY 18, Orig,...

  17. 76 FR 4061 - Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures...

    Science.gov (United States)

    2011-01-24

    ..., AL, Huntsville Intl--Carl T Jones Field, RADAR-1, Amdt 10 Mobile, AL, Mobile Downtown, VOR RWY 14... 18 Akron, OH, Akron-Canton Rgnl, RNAV (GPS) RWY 23, Orig Oklahoma City, OK, Will Rogers World, ILS...

  18. Wave-actuated power take-off device for electricity generation

    Energy Technology Data Exchange (ETDEWEB)

    Chertok, Allan

    2013-01-31

    Since 2008, Resolute Marine Energy, Inc. (RME) has been engaged in the development of a rigidly moored shallow-water point absorber wave energy converter, the "3D-WEC". RME anticipated that the 3D-WEC configuration with a fully buoyant point absorber buoy coupled to three power take off (PTO) units by a tripod array of tethers would achieve higher power capture than a more conventional 1-D configuration with a single tether and PTO. The investigation conducted under this program and documented herein addressed the following principal research question regarding RME's power take off (PTO) concept for its 3D-WEC: Is RME's winch-driven generator PTO concept, previously implemented at sub-scale and tested at the Ohmsett wave tank facility, scalable in a cost-effective manner to significant power levels e.g., 10 to 100kW?

  19. Targeting and timing promotional activities : An agent-based model for the takeoff of new products

    NARCIS (Netherlands)

    Delre, S. A.; Jager, W.; Bijmolt, T. H. A.; Janssen, M. A.

    Many marketing efforts focus on promotional activities that support the launch of new products. Promotional strategies may play a crucial role in the early stages of the product life cycle, and determine to a large extent the diffusion of a new product. This paper proposes an agent-based model to

  20. Take-Off. De opbouw van de Nederlandse luchtstrijdkrachten 1945-1973

    OpenAIRE

    van der Vegt, Q.J.

    2013-01-01

    There has been little academic focus on the build-up of the Dutch Air Force after the Second World War. The aim of this study is to identify the key developments in the build-up and sustainment of the Dutch air force between 1945 and 1973 and to answer the question as to which factors and actors shaped these developments. This study describes that process from the perspectives of foreign policy, domestic policy and the institutional perspective. At the level of multilateral dynamics, the Cold...