Alkaloids, including 2,5-dialkylpyrrolidines and 2,5-dialkylpyrrolines, have been reported to be components in the venom of little black ants, Monomorium minimum (Buckley). Two fatty amines were recently reported as minor compounds. By analyzing the discharge collected from the stinger apparatus (...
Alder, Patricia; Silverman, Jules
2005-04-01
We evaluated the effects of interspecific competition on ant bait performance with two urban pest ants, the Argentine ant, Linepithema humile (Mayr), and the little black ant, Monomorium minimum (Buckley). In a laboratory study, the impact of a solid sulfluramid bait on M. minimum was diminished when L. humile were present, whereas the presence of M. minimum reduced the performance of a liquid fipronil bait against L. humile. Argentine ants were not adversely affected by sulfluramid bait at any time, whereas M. minimum was unaffected by fipronil bait until 14 d of exposure. In field studies measuring diel foraging activity, M. minimum seemed to delay L. humile foraging to food stations by approximately 30 min during summer 2001. However, L. humile subsequently recruited to food stations in very high numbers, thereby displacing M. minimum. L. humile visited food stations over an entire 24-h period, whereas M. minimum was only observed visiting food stations during daylight hours. Adjusting the timing of bait placement in the field may minimize any negative effects of interspecific competition between these two species on toxic bait performance.
Wang, Lei; Chen, Jian
2015-08-01
Red imported fire ants, Solenopsis invicta, are significant invasive pests. Certain native ant species can compete with S. invicta, such as the little black ant, Monomorium minimum. Defensive secretions may contribute to the competition capacity of native ants. The chemistry of ant defensive secretions in the genus Monomorium has been subjected to extensive research. The insecticidal alkaloids, 2,5-dialkyl-pyrrolidines and 2,5-dialkyl-pyrrolines have been reported to dominate the venom of M. minimum. In this study, analysis of defensive secretions of workers and queens of M. minimum revealed two primary amines, decylamine and dodecylamine. Neither amine has been reported previously from natural sources. Toxicity and digging suppression by these two amines against S. invicta were examined. Decylamine had higher toxicity to S. invicta workers than dodecylamine, a quicker knockdown effect, and suppressed the digging behavior of S. invicta workers at lower concentration. However, the amount of fatty amines in an individual ant was not enough to knockdown a fire ant or suppress its digging behavior. These amines most likely work in concert with other components in the chemical defense of M. minimum.
DEFF Research Database (Denmark)
Eelen, Dieter; Børgesen, Lisbeth W.; Billen, Johan
2006-01-01
nurses and foragers. We suggest the PPG serves different purposes in pharaoh's ants: it is likely that the PPG of workers and virgin queens is used to feed larvae. In mated queens the gland probably plays a role in providing the queen with nutritious oils for egg production. The PPG may also function......The postpharyngeal gland (PPG) is unique to ants and is the largest exocrine gland in their head. In queens of the pharaoh's ant, Monomorium pharaonis, the gland contains approximately 15 finger-like epithelial extensions on each side and opens dorsolaterally in the posterior pharynx. In these ants...
Environmental Assessment, Project MOUNTAINVIEW Facility, Buckley Air Force Base, Colorado
2011-10-01
of a single individual. Species with high potential to occur at Buckley AFB, but that were not documented, include the tiger salamander (Ambystoma...in danger of extinction throughout all or a significant portion of its range; a threatened species is one that is likely to become endangered in the
Travelling wave solution of the Buckley-Leverett equation
Tychkov, Sergey
2016-09-01
A two-dimensional Buckley-Leverett system governing motion of two-phase flow is considered. Travelling-wave solutions for these equations are found. Wavefronts of these solutions may be circles, lines and parabolae. Values of pressure and saturation on the wave fronts are found.
Queen-worker caste ratio depends on colony size in the pharaoh ant (Monomorium pharaonis)
DEFF Research Database (Denmark)
Schmidt, Anna Mosegaard; Linksvayer, Timothy Arnold; Boomsma, Jacobus Jan
2011-01-01
The success of an ant colony depends on the simultaneous presence of reproducing queens and nonreproducing workers in a ratio that will maximize colony growth and reproduction. Despite its presumably crucial role, queen–worker caste ratios (the ratio of adult queens to workers) and the factors...... affecting this variable remain scarcely studied. Maintaining polygynous pharaoh ant (Monomorium pharaonis) colonies in the laboratory has provided us with the opportunity to experimentally manipulate colony size, one of the key factors that can be expected to affect colony level queen–worker caste ratios...... and body size of eclosing workers, gynes and males. We found that smaller colonies produced more new queens relative to workers, and that these queens and workers both tended to be larger. However, colony size had no effect on the size of males or on the sex ratio of the individuals reared. Furthermore...
Vobrázková, E; Vanková, J; Samsinák, K
1976-05-01
Of two apartment houses infested with ants of the species Monomorium pharaonis, one was treated with a biological, the other with a chemical substance. In the first case we used Bathurin in combination with borax at a concentration of 1.3% for both substances. In the first week, borax was added to the bait (minced beef), within the next three weeks, the bait was mixed with Bathurin. The procedure was repeated 5 times. After this period, we achieved complete control of the ants on the infested premises.--Our results obtained with the chemical substance (the insecticide Anthrix) were less successful. This indicates that the first method, although time-consuming and requiring a perfect collaboration with all inhabitants, is safer, because it leads to the complete eradication of ants in the infested premises.
Eelen, Dieter; Børgesen, Lisbeth W; Billen, Johan
2004-10-01
A novel glandular epithelium lining the infrabuccal cavity and anterior pharynx is described in both workers and queens of the pharaoh's ant Monomorium pharaonis. The infrabuccal cavity, connected with the buccal tube, forms a ventral outgrowth of the anterior pharynx, and as such displays the tegumental lining with a cuticle and an epithelial layer. In its dorsal region, the cavity's epithelium reaches a thickness of approx. 11-12mum in both workers and queens, which is considerably thicker than the epithelium lining the rest of the infrabuccal cavity. Also the possible role of the infrabuccal gland is discussed.
The extension of Buckley-Feuring solutions for non-polynomial fuzzy partial differential equations
Galvez, David; Pino, Jose Luis
2008-01-01
This paper presents the natural extension of Buckley-Feuring method proposed in \\cite{BuckleyFeuring99} for solving fuzzy partial differential equations (FPDE) in a non-polynomial relation, such as the operator $\\varphi(D_{x_1}, D_{x_2})$, which maps to the quotient between both partials. The new assumptions and conditions proceedings from this consideration are given in this document.
2009-04-01
Response IEC International Electrotechnical Commission IICEP Interagency and Intergovernmental Coordination for Environmental Planning IRP...Buckley AFB system during electrical failures and lightning strikes. The SPVA would be designed to continuously feed power to the Buckley electrical...result of the increase in traffic. Transformer Noise. Transformer noise levels are regulated by International Electrotechnical Commission ( IEC
Directory of Open Access Journals (Sweden)
Daniel Robert McClure
2016-12-01
Full Text Available The 1965 debate at Cambridge University between James Baldwin and William F. Buckley, Jr., posed the question: “Has the American Dream been achieved at the Expense of the American Negro?” Within the contours of the debate, Baldwin and Buckley wrestled with the ghosts of settler colonialism and slavery in a nation founded on freedom and equality. Framing the debate within the longue durée, this essay examines the deep cultural currents related to the American racial paradox at the height of the Civil Rights movement. Underscoring the changing language of white resistance against black civil rights, the essay argues that the Baldwin and Buckley debate anticipated the ways the U.S. would address racial inequality in the aftermath of the civil rights era and the dawn of neoliberalism in the 1970s.
El enfoque de Buckley del modelo de insumo-producto en condiciones de incertidumbre
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Luisa L. Lazzari
2003-01-01
Full Text Available En este trabajo se presenta el enfoque de Buckley [1] del modelo abierto de insumoproducto en el cual los coeficientes técnicos están expresados mediante números borrosos. El modelo propuesto permite un mejor aprovechamiento de la información disponible.
Buckley's Scheme of Schemes as a Foundation for Teaching Family Systems Theory.
Duncan, Barry L.; Fraser, J. Scott
1987-01-01
Urges emphasis on the development of a strong system theory base upon which future practitioners and researchers can build. Advocates the use of Buckley's hierarchical scheme as a teaching tool to provide an understandable, yet broadly applicable, theory base for graduate students in an introductory family therapy course. Outlines an effective…
Puudega inimesed tahavad tööd teha / Mike Buckley
Buckley, Mike
2003-01-01
PHARE nõuniku Mike Buckley hinnangul kipuvad toetuste- ja pensionisüsteemid eeldama, et puudega inimesed ei ole suutelised töötama, samas näitavad küsitlused, et kolmandik neist sooviks töötada
2006-03-01
2001 Final EA for Training Activities and Demolition of the Boresight Antennae and Buildings 440 & 441 Buckley AFB Identification and development...the coyote ( Canis latrans), pronghorn (Antilocapra americana), and mule deer (Odocoileus hemionus). However, since a perimeter fence was erected in...migratorius Robin Lanius ludovicianus Loggerhead shrike Mimus polyglottos Northern Mockingbird Molothrus ater Brown-headed cowbird Passer domesticus
2005-12-01
sparrow (Passer domesticus), rock dove (Columba Iivia), and European starling (Sturnus vulgaris ). Raptor species known or likely to occur at Buckley... Sky Ranch • Cottage Grove - a residential development with approximately I 04 units, currently under construction at Chambers Road at East l71h A
National Research Council Canada - National Science Library
Peter Buckley
2014-01-01
.... Buckley and Mark Casson AIB Dissertation Award presented their dissertations in 12 minutes each will be unsurprised to read that this was an excellent year for international business doctorates...
Research on Evaluation Method Based on Modified Buckley Decision Making and Bayesian Network
Directory of Open Access Journals (Sweden)
Neng-pu Yang
2015-01-01
Full Text Available This work presents a novel evaluation method, which can be applied in the field of risk assessment, project management, cause analysis, and so forth. Two core technologies are used in the method, namely, modified Buckley Decision Making and Bayesian Network. Based on the modified Buckley Decision Making, the fuzzy probabilities of element factors are calibrated. By the forward and backward calculation of Bayesian Network, the structure importance, probability importance, and criticality importance of each factor are calculated and discussed. A numerical example of risk evaluation for dangerous goods transport process is given to verify the method. The results indicate that the method can efficiently identify the weakest element factor. In addition, the method can improve the reliability and objectivity for evaluation.
2007-06-01
removed during the project would be used as fill material or stock piled for use at other locations on Buckley AFB. Implementation of BMPs during...associated with mixed grass prairie are scarlet globe mallow (Spaeralcea coccinea), prickly pear (Opuntia macrohiza), rabbitbrush (Chrysothamnus...minimize potential erosion and sedimentation during the construction phase • Soil removed during the project would be used as fill material or stock
Laukaitis, John J.
2013-01-01
In 1951, William F. Buckley, Jr. was a recent alumnus of Yale University and former editor of the "Yale Daily News" when his first major work, "God and Man at Yale: The Superstitions of 'Academic Freedom'," became a controversial polemic that attracted national attention. In his work, Buckley claimed Yale's faculty advanced…
El enfoque de Buckley del modelo de insumo-producto en condiciones de incertidumbre
Luisa L. Lazzari; Moriñigo, María S
2004-01-01
Se presenta el enfoque de Buckley del modelo abierto de insumo-producto en el cual los coeficientes técnicos están expresados mediante números borrosos. El modelo propuesto permite un mejor aprovechamiento de la información disponible. Fil: Lazzari, Luisa L. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires. Argentina Fil: Moriñigo, María S. Universidad de Buenos Aires. Facultad de Ciencias Económicas. Buenos Aires. Argentina
Directory of Open Access Journals (Sweden)
Christine Longworth
2004-07-01
Full Text Available The area around Buckley in north Wales has been associated with the production of pottery since the 13th or 14th centuries. Nineteen different pottery sites have been identified, producing a wide range of ceramic wares in the six-hundred year period up to the mid-20th century. In the 17th and 18th centuries, many of the wares produced were of high quality, on a par with Staffordshire wares of the same date. In the early 17th century, the technique of sgraffito decoration spread to north Devon and Somerset from mainland Europe. Buckley is the only known site to produce early sgraffito wares in northern Britain. This article aims to establish the date of the production and range of early sgraffito wares at Buckley and to examine the derivation of the designs and illustrations on the vessels. An illustrated catalogue has been produced and a comparative study made of sgraffito wares elsewhere to place Buckley into a national and international context. The results show that early sgraffito production at Brookhill pottery, Buckley, was between 1640-1720. Of the excavated pieces, 62% were made between 1640-1680, and the number of sherds by vessel number is also greater within that date range. All the vessels are dishes. The form and designs on the remainder of the sherds, dated up to 1720, are no different from those dated to 1640-1680, which suggests a continuous period of production. The most common themes on the pots – tulips, leaves, mottoes, animals and birds – relate very closely to the designs featured on other objects made in the same period such as textiles, wallpaper, furniture and manuscripts. Some of the designs were available in pattern books for particular groups of objects, for example needlework and pastry decoration. There is an interesting sub-group of pieces with animal and bird motifs and mottoes on the rims. It is possible that the influence for these came from a resurgence of interest in the medieval bestiary texts and
Green, James
2012-01-01
The March 24, 2008, edition of "National Review" (NR) was dedicated to the memory of its founder: William F. Buckley, Jr., who had passed away on February 27, 2008. It included thirty two different memorials about him written by prominent authors, editors, social commentators, fellow journalists, politicians, and historians. Then NR…
2004-07-01
effects on vegetation. Wildlife . The midgrass prairie habitat in the vicinity of the RTF provides suitable habitat for birds , small and large mammals ...Guard Bureau APE Area of Potential Effect AQCR Air Quality Control Region BMPs best management practices CAA Clean Air Act CDPHE Colorado...on Buckley AFB provides a diversity of habitat that supports many wildlife species typical of the high plains of Colorado. Mammals . Mammalian
Srinivasan, V; Patchett, C L; Waterhouse, P J
2006-03-01
(1) To present a narrative review of the currently available alternative interventions and materials to formocresol pulpotomy for the management of extensive caries in the primary molar, and (2) to produce a clinical protocol for pulp therapy techniques in the extensively carious primary molar. The International Agency for Research on Cancer has recently classified formaldehyde as carcinogenic to human beings. Since Buckley's Formocresol contains 19% formaldehyde in its full strength and, therefore, 1% in a 20% dilution, a safer alternative should be identified. A narrative review of the published literature for primary molar pulp therapy techniques was undertaken following an extensive and appropriate literature search. A specialist group of paediatric dentists was formed to arrive at a consensus and establish an evidence-based protocol for the management of extensively carious primary molar teeth. Part I of this paper explores the currently available alternative interventions and materials to formocresol in the form of a narrative review. The second part of the paper will present the formation of a specialist group to arrive at a consensus and establish an evidence-based protocol for the management of the extensively carious primary molar. After consideration of a review of extensively searched literature, a protocol and key points document have been developed to assist clinicians in their treatment planning. Further long-term studies with the highest level of evidence (i.e. randomized controlled trials) are required to enable us to identify acceptable alternatives which can replace formocresol.
2005-01-01
energy resource efficient design (e.g., a southeast orientation to the building would allow for solar exposure to the hangar doors and apron area, which... solar effects into the design. Communications. Buckley AFB is well served by fiber-optic lines and other communication facilities. There would be a...Box 737 Ignacio , CO 8113 7 From: Colorado Army National Guard 6846 S. Revere Pkwy. Centennial, CO 80112 Dear Mr. Frazier, 12 May2004 The Colorado
Directory of Open Access Journals (Sweden)
V. Rahimi
2015-12-01
Full Text Available The area of Zagros forests is continuously in danger of destruction. Therefore, the remaining forests should be carefully managed based on ecological capability evaluation. In fact, land evaluation includes prediction or assessment of land quality for a special land use with regard to production, vulnerability and management requirements. In this research, we studied the ecological capability of Behbahan city fringe for forestry land use. After the basic studies were completed and the thematic maps such as soil criteria, climate, physiography, vegetation and bedrock were prepared, the fuzzy multi-criteria decision-making methods of Fuzzy AHP Buckley and ANP were used to standardize and determine the weights of criteria. Finally, the ecological model of the region’s capability was generated to prioritize forestry land use and prepare the final map of evaluation using WLC model in seven classes. The results showed that in ANP method, 55.58% of the area is suitable for forestry land use which is more consistent with the reality, while in the Fuzzy AHP method, 95.23% of the area was found suitable. Finally, it was concluded that the ANP method shows more flexibility and ability to determine suitable areas for forestry land use in the study area.
Heirene, Robert M; Shearer, David; Mellalieu, Stephen D; Roderique-Davies, Gareth
2016-12-01
Buckley's commentary on our study of rock climber's withdrawal experiences raises a number of important questions surrounding the concept of extreme or adventure sports addiction. Drawing on the few available investigations of this topic, we respond to Buckley's questions here, though emphasize the need for further studies of extreme sports addiction in order to provide more empirically informed answers.
Waterhouse, P J; Nunn, J H; Whitworth, J M
2000-01-08
To compare the clinical and radiological outcomes following two different, single visit vital pulp therapy techniques, in cariously exposed primary molar teeth. A paediatric dental clinic within the Dental Hospital, Newcastle upon Tyne, UK. Fifty two child patients were sequentially enrolled in the clinical investigation, 26 males and 26 females with an age range of 3.3-12.5 years. Primary molar teeth requiring vital pulp therapy were randomly allocated to either the formocresol group (F) or the calcium hydroxide group (C). The total number of teeth treated was 84. Recruitment was on the basis of strict inclusion criteria. Coronal pulp amputation was prescribed only in teeth with vital, cariously exposed pulp tissue. Treatment was undertaken between October 1994 and December 1996. All cases were reviewed using predefined clinical and radiological criteria. The statistical tests used were logistic regression of a triple nested data structure, chi-squared analysis of equality of treatment and probability of success with relation to subject age. Eighty-four cariously exposed primary molars required vital pulp therapy. Forty six (55%) teeth were included in the F group and 38 (45%) allocated to the C group. Five teeth were lost to follow-up, leaving 79 teeth: forty four (56%) in group F and 35 (44%) in group C. Eighty four percent (37/44) of teeth treated with formocresol and 77 percent (27/35) treated with calcium hydroxide were classed as clinically and radiographically successful at the cut-off date, December 1997, after a mean clinical review of 22.5 months (range 6.1-38.5 months) and a mean radiographic review of 18.9 months (range 1.3-36.9 months). This investigation confirms the clinical efficacy of a one-fifth dilution of Buckley's Formocresol as an agent in pulp treatment of cariously exposed, vital primary molar teeth. However, calcium hydroxide in its pure, powder form is a clinically acceptable alternative when combined with strict selection criteria for
Caste-specific tyramides from Myrmicine ants
T.H. Jones; H.M. Garrafo; T.F. Spande; N.R. Andriamaharavo; J.S.T. Gorman; A.J. Snyder; A.W. Jeter; J.A. Torres; John W. Daly
2010-01-01
Analysis of the extracts of male ants of Monomorium minimum and Monomorium ebeninum by GC-MS and GC-FTIR revealed the presence of tyramides 2 and 4c, for which the structures were established by comparison with synthetic samples. These compounds and their analogues 1 and 3 were also found in males of other Monomorium species, males of Myrmicaria opaciventris, and males...
Minimum Length - Maximum Velocity
Panes, Boris
2011-01-01
We study a framework where the hypothesis of a minimum length in space-time is complemented with the notion of reference frame invariance. It turns out natural to interpret the action of the obtained reference frame transformations in the context of doubly special relativity. As a consequence of this formalism we find interesting connections between the minimum length properties and the modified velocity-energy relation for ultra-relativistic particles. For example we can predict the ratio between the minimum lengths in space and time using the results from OPERA about superluminal neutrinos.
Rising above the Minimum Wage.
Even, William; Macpherson, David
An in-depth analysis was made of how quickly most people move up the wage scale from minimum wage, what factors influence their progress, and how minimum wage increases affect wage growth above the minimum. Very few workers remain at the minimum wage over the long run, according to this study of data drawn from the 1977-78 May Current Population…
Cardinal, Jean; Joret, Gwenaël
2008-01-01
We study graph orientations that minimize the entropy of the in-degree sequence. The problem of finding such an orientation is an interesting special case of the minimum entropy set cover problem previously studied by Halperin and Karp [Theoret. Comput. Sci., 2005] and by the current authors [Algorithmica, to appear]. We prove that the minimum entropy orientation problem is NP-hard even if the graph is planar, and that there exists a simple linear-time algorithm that returns an approximate solution with an additive error guarantee of 1 bit. This improves on the only previously known algorithm which has an additive error guarantee of log_2 e bits (approx. 1.4427 bits).
Ana Paula Camolese Fornetti
2007-01-01
O objetivo deste estudo foi comparar a eficácia clínica e radiográfica do formocresol de Buckley diluído a 1/5 e do cimento Portland como agentes capeadores pulpares em dentes decíduos humanos acometidos por cárie extensa. Sessenta e oito molares decíduos inferiores de 52 crianças com idades entre 5 e 9 anos foram criteriosamente selecionados. Os dentes foram aleatoriamente divididos nos grupos formocresol ou cimento Portland e tratados pela técnica convencional de pulpotomia. Após a remoção ...
DILEMATIKA PENETAPAN UPAH MINIMUM
Directory of Open Access Journals (Sweden)
. Pitaya
2015-02-01
Full Text Available In the effort of creating appropiate wage for employees, it is necessary to determine the wages by considering the increase of poverty without ignoring the increase of productivity, the progressivity of companies and the growth of economic. The new minimum wages in the provincial level and the regoinal/municipality level have been implemented per 1st January in Indonesia since 2001. The determination of minimum wage for provinvial level should be done 30 days before 1st January, whereas the determination of minimumwage for regional/municipality level should be done 40 days before 1st January. Moreover,there is an article which governs thet the minimumwage will be revised annually. By considering the time of determination and the time of revision above,it can be predicted that before and after the determination date will be crucial time. This is because the controversy among parties in industrial relationships will arise. The determination of minimum wage will always become a dilemmatic step which has to be done by the Government. Through this policy, on one side the government attempts to attract many investors, however, on the other side the government also has to protect the employees in order to have the appropiate wage in accordance with the standard of living.
Minimum quality standards and exports
2015-01-01
This paper studies the interaction of a minimum quality standard and exports in a vertical product differentiation model when firms sell global products. If ex ante quality of foreign firms is lower (higher) than the quality of exporting firms, a mild minimum quality standard in the home market hinders (supports) exports. The minimum quality standard increases quality in both markets. A welfare maximizing minimum quality standard is always lower under trade than under autarky. A minimum quali...
Minimum Error Entropy Classification
Marques de Sá, Joaquim P; Santos, Jorge M F; Alexandre, Luís A
2013-01-01
This book explains the minimum error entropy (MEE) concept applied to data classification machines. Theoretical results on the inner workings of the MEE concept, in its application to solving a variety of classification problems, are presented in the wider realm of risk functionals. Researchers and practitioners also find in the book a detailed presentation of practical data classifiers using MEE. These include multi‐layer perceptrons, recurrent neural networks, complexvalued neural networks, modular neural networks, and decision trees. A clustering algorithm using a MEE‐like concept is also presented. Examples, tests, evaluation experiments and comparison with similar machines using classic approaches, complement the descriptions.
Do Minimum Wages Fight Poverty?
David Neumark; William Wascher
1997-01-01
The primary goal of a national minimum wage floor is to raise the incomes of poor or near-poor families with members in the work force. However, estimates of employment effects of minimum wages tell us little about whether minimum wages are can achieve this goal; even if the disemployment effects of minimum wages are modest, minimum wage increases could result in net income losses for poor families. We present evidence on the effects of minimum wages on family incomes from matched March CPS s...
Orme, John S.; Nobbs, Steven G.
1995-01-01
The minimum fuel mode of the NASA F-15 research aircraft is designed to minimize fuel flow while maintaining constant net propulsive force (FNP), effectively reducing thrust specific fuel consumption (TSFC), during cruise flight conditions. The test maneuvers were at stabilized flight conditions. The aircraft test engine was allowed to stabilize at the cruise conditions before data collection initiated; data were then recorded with performance seeking control (PSC) not-engaged, then data were recorded with the PSC system engaged. The maneuvers were flown back-to-back to allow for direct comparisons by minimizing the effects of variations in the test day conditions. The minimum fuel mode was evaluated at subsonic and supersonic Mach numbers and focused on three altitudes: 15,000; 30,000; and 45,000 feet. Flight data were collected for part, military, partial, and maximum afterburning power conditions. The TSFC savings at supersonic Mach numbers, ranging from approximately 4% to nearly 10%, are in general much larger than at subsonic Mach numbers because of PSC trims to the afterburner.
Minimum wages, earnings, and migration
National Research Council Canada - National Science Library
Boffy-Ramirez, Ernest
2013-01-01
Does increasing a state’s minimum wage induce migration into the state? Previous literature has shown mobility in response to welfare benefit differentials across states, yet few have examined the minimum wage as a cause of mobility...
Kavitha, Telikepalli; Nimbhorkar, Prajakta
2010-01-01
We consider an extension of the {\\em popular matching} problem in this paper. The input to the popular matching problem is a bipartite graph G = (A U B,E), where A is a set of people, B is a set of items, and each person a belonging to A ranks a subset of items in an order of preference, with ties allowed. The popular matching problem seeks to compute a matching M* between people and items such that there is no matching M where more people are happier with M than with M*. Such a matching M* is called a popular matching. However, there are simple instances where no popular matching exists. Here we consider the following natural extension to the above problem: associated with each item b belonging to B is a non-negative price cost(b), that is, for any item b, new copies of b can be added to the input graph by paying an amount of cost(b) per copy. When G does not admit a popular matching, the problem is to "augment" G at minimum cost such that the new graph admits a popular matching. We show that this problem is...
Social Security's special minimum benefit.
Olsen, K A; Hoffmeyer, D
Social Security's special minimum primary insurance amount (PIA) provision was enacted in 1972 to increase the adequacy of benefits for regular long-term, low-earning covered workers and their dependents or survivors. At the time, Social Security also had a regular minimum benefit provision for persons with low lifetime average earnings and their families. Concerns were rising that the low lifetime average earnings of many regular minimum beneficiaries resulted from sporadic attachment to the covered workforce rather than from low wages. The special minimum benefit was seen as a way to reward regular, low-earning workers without providing the windfalls that would have resulted from raising the regular minimum benefit to a much higher level. The regular minimum benefit was subsequently eliminated for workers reaching age 62, becoming disabled, or dying after 1981. Under current law, the special minimum benefit will phase out over time, although it is not clear from the legislative history that this was Congress's explicit intent. The phaseout results from two factors: (1) special minimum benefits are paid only if they are higher than benefits payable under the regular PIA formula, and (2) the value of the regular PIA formula, which is indexed to wages before benefit eligibility, has increased faster than that of the special minimum PIA, which is indexed to inflation. Under the Social Security Trustees' 2000 intermediate assumptions, the special minimum benefit will cease to be payable to retired workers attaining eligibility in 2013 and later. Their benefits will always be larger under the regular benefit formula. As policymakers consider Social Security solvency initiatives--particularly proposals that would reduce benefits or introduce investment risk--interest may increase in restoring some type of special minimum benefit as a targeted protection for long-term low earners. Two of the three reform proposals offered by the President's Commission to Strengthen
1977-06-01
Wher.’: l h , . : i~~;q’ if the plume above the tower in meters; = I .~ eX , ” V . ,,IOc ~~~t~~ 6 m,’sec; d e t ‘‘ . ‘ i ~~~~ I ,)W IV I amef i’r
Minimum signals in classical physics
Institute of Scientific and Technical Information of China (English)
邓文基; 许基桓; 刘平
2003-01-01
The bandwidth theorem for Fourier analysis on any time-dependent classical signal is shown using the operator approach to quantum mechanics. Following discussions about squeezed states in quantum optics, the problem of minimum signals presented by a single quantity and its squeezing is proposed. It is generally proved that all such minimum signals, squeezed or not, must be real Gaussian functions of time.
Minimum length-maximum velocity
Panes, Boris
2012-03-01
We study a framework where the hypothesis of a minimum length in space-time is complemented with the notion of reference frame invariance. It turns out natural to interpret the action of the obtained reference frame transformations in the context of doubly special relativity. As a consequence of this formalism we find interesting connections between the minimum length properties and the modified velocity-energy relation for ultra-relativistic particles. For example, we can predict the ratio between the minimum lengths in space and time using the results from OPERA on superluminal neutrinos.
Cook, Philip
2013-01-01
A minimum voting age is defended as the most effective and least disrespectful means of ensuring all members of an electorate are sufficiently competent to vote. Whilst it may be reasonable to require competency from voters, a minimum voting age should be rejected because its view of competence is unreasonably controversial, it is incapable of defining a clear threshold of sufficiency and an alternative test is available which treats children more respectfully. This alternative is a procedura...
Minimum Q Electrically Small Antennas
DEFF Research Database (Denmark)
Kim, O. S.
2012-01-01
for a multiarm spherical helix antenna confirm the theoretical predictions. For example, a 4-arm spherical helix antenna with a magnetic-coated perfectly electrically conducting core (ka=0.254) exhibits the Q of 0.66 times the Chu lower bound, or 1.25 times the minimum Q.......Theoretically, the minimum radiation quality factor Q of an isolated resonance can be achieved in a spherical electrically small antenna by combining TM1m and TE1m spherical modes, provided that the stored energy in the antenna spherical volume is totally suppressed. Using closed-form expressions...... for the stored energies obtained through the vector spherical wave theory, it is shown that a magnetic-coated metal core reduces the internal stored energy of both TM1m and TE1m modes simultaneously, so that a self-resonant antenna with the Q approaching the fundamental minimum is created. Numerical results...
Minimum Thermal Conductivity of Superlattices
Energy Technology Data Exchange (ETDEWEB)
Simkin, M. V.; Mahan, G. D.
2000-01-31
The phonon thermal conductivity of a multilayer is calculated for transport perpendicular to the layers. There is a crossover between particle transport for thick layers to wave transport for thin layers. The calculations show that the conductivity has a minimum value for a layer thickness somewhat smaller then the mean free path of the phonons. (c) 2000 The American Physical Society.
Minimum aanlandingsmaat Brasem (Abramis brama)
Hal, van R.; Miller, D.C.M.
2016-01-01
Ter ondersteuning van een besluit aangaande een minimum aanlandingsmaat voor brasem, primair voor het IJsselmeer en Markermeer, heeft het ministerie van Economische Zaken IMARES verzocht een overzicht te geven van aanlandingsmaten voor brasem in andere landen en waar mogelijk de motivatie achter dez
Coupling between minimum scattering antennas
DEFF Research Database (Denmark)
Andersen, J.; Lessow, H; Schjær-Jacobsen, Hans
1974-01-01
Coupling between minimum scattering antennas (MSA's) is investigated by the coupling theory developed by Wasylkiwskyj and Kahn. Only rotationally symmetric power patterns are considered, and graphs of relative mutual impedance are presented as a function of distance and pattern parameters. Crossed...
Directory of Open Access Journals (Sweden)
Christine F. Marton
2011-01-01
Full Text Available Objectives – To compare the performance of the vector space model and the probabilistic weighting model of relevance feedback for the overall purpose of determining the most useful relevance feedback procedures. The amount of improvement that can be obtained from searching several test document collections with only one feedback iteration of each relevance feedback model was measured.Design – The experimental design consisted of 72 different tests: 2 different relevance feedback methods, each with 6 permutations, on 6 test document collections of various sizes. A residual collection method was utilized to ascertain the “true advantage provided by the relevance feedback process.” (Salton & Buckley, 1990, p. 293Setting – Department of Computer Science at Cornell University.Subjects – Six test document collections.Methods – Relevance feedback is an effective technique for query modification that provides significant improvement in search performance. Relevance feedback entails both “term reweighting,” the modification of term weights based on term use in retrieved relevant and non-relevant documents, and “query expansion,” which is the addition of new terms from relevant documents retrieved (Harman, 1992. Salton and Buckley (1990 evaluated two established relevance feedback models based on the vector space model (a spatial model and the probabilistic model, respectively. Harman (1992 describes the two key differences between these competing models of relevance feedback.[The vector space model merges] document vectors and original query vectors. This automatically reweights query terms by adding the weights from the actual occurrence of those query terms in the relevant documents, and subtracting the weights of those terms occurring in the non-relevant documents. Queries are automatically expanded by adding all the terms not in the original query that are in the relevant documents and non-relevant documents. They are expanded
Understanding the Minimum Wage: Issues and Answers.
Employment Policies Inst. Foundation, Washington, DC.
This booklet, which is designed to clarify facts regarding the minimum wage's impact on marketplace economics, contains a total of 31 questions and answers pertaining to the following topics: relationship between minimum wages and poverty; impacts of changes in the minimum wage on welfare reform; and possible effects of changes in the minimum wage…
2010-01-01
... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Minimum wage. 551.301 Section 551.301... FAIR LABOR STANDARDS ACT Minimum Wage Provisions Basic Provision § 551.301 Minimum wage. (a)(1) Except... employees wages at rates not less than the minimum wage specified in section 6(a)(1) of the Act for all...
Quantum mechanics the theoretical minimum
Susskind, Leonard
2014-01-01
From the bestselling author of The Theoretical Minimum, an accessible introduction to the math and science of quantum mechanicsQuantum Mechanics is a (second) book for anyone who wants to learn how to think like a physicist. In this follow-up to the bestselling The Theoretical Minimum, physicist Leonard Susskind and data engineer Art Friedman offer a first course in the theory and associated mathematics of the strange world of quantum mechanics. Quantum Mechanics presents Susskind and Friedman’s crystal-clear explanations of the principles of quantum states, uncertainty and time dependence, entanglement, and particle and wave states, among other topics. An accessible but rigorous introduction to a famously difficult topic, Quantum Mechanics provides a tool kit for amateur scientists to learn physics at their own pace.
Kwee, R E; The ATLAS collaboration
2010-01-01
Since the restart of the LHC in November 2009, ATLAS has collected inelastic pp-collisions to perform first measurements on charged particle densities. These measurements will help to constrain various models describing phenomenologically soft parton interactions. Understanding the trigger efficiencies for different event types are therefore crucial to minimize any possible bias in the event selection. ATLAS uses two main minimum bias triggers, featuring complementary detector components and trigger levels. While a hardware based first trigger level situated in the forward regions with 2.09 < |eta| < 3.8 has been proven to select pp-collisions very efficiently, the Inner Detector based minimum bias trigger uses a random seed on filled bunches and central tracking detectors for the event selection. Both triggers were essential for the analysis of kinematic spectra of charged particles. Their performance and trigger efficiency measurements as well as studies on possible bias sources will be presen...
Minimum thickness anterior porcelain restorations.
Radz, Gary M
2011-04-01
Porcelain laminate veneers (PLVs) provide the dentist and the patient with an opportunity to enhance the patient's smile in a minimally to virtually noninvasive manner. Today's PLV demonstrates excellent clinical performance and as materials and techniques have evolved, the PLV has become one of the most predictable, most esthetic, and least invasive modalities of treatment. This article explores the latest porcelain materials and their use in minimum thickness restoration.
Fingerprinting with Minimum Distance Decoding
Lin, Shih-Chun; Gamal, Hesham El
2007-01-01
This work adopts an information theoretic framework for the design of collusion-resistant coding/decoding schemes for digital fingerprinting. More specifically, the minimum distance decision rule is used to identify 1 out of t pirates. Achievable rates, under this detection rule, are characterized in two distinct scenarios. First, we consider the averaging attack where a random coding argument is used to show that the rate 1/2 is achievable with t=2 pirates. Our study is then extended to the general case of arbitrary $t$ highlighting the underlying complexity-performance tradeoff. Overall, these results establish the significant performance gains offered by minimum distance decoding as compared to other approaches based on orthogonal codes and correlation detectors. In the second scenario, we characterize the achievable rates, with minimum distance decoding, under any collusion attack that satisfies the marking assumption. For t=2 pirates, we show that the rate $1-H(0.25)\\approx 0.188$ is achievable using an ...
Minimum feature size preserving decompositions
Aloupis, Greg; Demaine, Martin L; Dujmovic, Vida; Iacono, John
2009-01-01
The minimum feature size of a crossing-free straight line drawing is the minimum distance between a vertex and a non-incident edge. This quantity measures the resolution needed to display a figure or the tool size needed to mill the figure. The spread is the ratio of the diameter to the minimum feature size. While many algorithms (particularly in meshing) depend on the spread of the input, none explicitly consider finding a mesh whose spread is similar to the input. When a polygon is partitioned into smaller regions, such as triangles or quadrangles, the degradation is the ratio of original to final spread (the final spread is always greater). Here we present an algorithm to quadrangulate a simple n-gon, while achieving constant degradation. Note that although all faces have a quadrangular shape, the number of edges bounding each face may be larger. This method uses Theta(n) Steiner points and produces Theta(n) quadrangles. In fact to obtain constant degradation, Omega(n) Steiner points are required by any al...
Ceramic veneers with minimum preparation.
da Cunha, Leonardo Fernandes; Reis, Rachelle; Santana, Lino; Romanini, Jose Carlos; Carvalho, Ricardo Marins; Furuse, Adilson Yoshio
2013-10-01
The aim of this article is to describe the possibility of improving dental esthetics with low-thickness glass ceramics without major tooth preparation for patients with small to moderate anterior dental wear and little discoloration. For this purpose, a carefully defined treatment planning and a good communication between the clinician and the dental technician helped to maximize enamel preservation, and offered a good treatment option. Moreover, besides restoring esthetics, the restorative treatment also improved the function of the anterior guidance. It can be concluded that the conservative use of minimum thickness ceramic laminate veneers may provide satisfactory esthetic outcomes while preserving the dental structure.
Asymmetric k-Center with Minimum Coverage
DEFF Research Database (Denmark)
Gørtz, Inge Li
2008-01-01
In this paper we give approximation algorithms and inapproximability results for various asymmetric k-center with minimum coverage problems. In the k-center with minimum coverage problem, each center is required to serve a minimum number of clients. These problems have been studied by Lim et al. [A....... Lim, B. Rodrigues, F. Wang, Z. Xu, k-center problems with minimum coverage, Theoret. Comput. Sci. 332 (1–3) (2005) 1–17] in the symmetric setting....
Minimum Delay Moving Object Detection
Lao, Dong
2017-01-08
We present a general framework and method for detection of an object in a video based on apparent motion. The object moves relative to background motion at some unknown time in the video, and the goal is to detect and segment the object as soon it moves in an online manner. Due to unreliability of motion between frames, more than two frames are needed to reliably detect the object. Our method is designed to detect the object(s) with minimum delay, i.e., frames after the object moves, constraining the false alarms. Experiments on a new extensive dataset for moving object detection show that our method achieves less delay for all false alarm constraints than existing state-of-the-art.
Minimum Competency Testing and the Handicapped.
Wildemuth, Barbara M.
This brief overview of minimum competency testing and disabled high school students discusses: the inclusion or exclusion of handicapped students in minimum competency testing programs; approaches to accommodating the individual needs of handicapped students; and legal issues. Surveys of states that have mandated minimum competency tests indicate…
Do Some Workers Have Minimum Wage Careers?
Carrington, William J.; Fallick, Bruce C.
2001-01-01
Most workers who begin their careers in minimum-wage jobs eventually gain more experience and move on to higher paying jobs. However, more than 8% of workers spend at least half of their first 10 working years in minimum wage jobs. Those more likely to have minimum wage careers are less educated, minorities, women with young children, and those…
Does the Minimum Wage Affect Welfare Caseloads?
Page, Marianne E.; Spetz, Joanne; Millar, Jane
2005-01-01
Although minimum wages are advocated as a policy that will help the poor, few studies have examined their effect on poor families. This paper uses variation in minimum wages across states and over time to estimate the impact of minimum wage legislation on welfare caseloads. We find that the elasticity of the welfare caseload with respect to the…
Minimum income protection in the Netherlands
van Peijpe, T.
2009-01-01
This article offers an overview of the Dutch legal system of minimum income protection through collective bargaining, social security, and statutory minimum wages. In addition to collective agreements, the Dutch statutory minimum wage offers income protection to a small number of workers. Its effect
Linear Minimum variance estimation fusion
Institute of Scientific and Technical Information of China (English)
ZHU Yunmin; LI Xianrong; ZHAO Juan
2004-01-01
This paper shows that a general mulitisensor unbiased linearly weighted estimation fusion essentially is the linear minimum variance (LMV) estimation with linear equality constraint, and the general estimation fusion formula is developed by extending the Gauss-Markov estimation to the random paramem of distributed estimation fusion in the LMV setting.In this setting ,the fused estimator is a weighted sum of local estimatess with a matrix quadratic optimization problem subject to a convex linear equality constraint. Second, we present a unique solution to the above optimization problem, which depends only on the covariance matrixCK. Third, if a priori information, the expectation and covariance, of the estimated quantity is unknown, a necessary and sufficient condition for the above LMV fusion becoming the best unbiased LMV estimation with dnown prior information as the above is presented. We also discuss the generality and usefulness of the LMV fusion formulas developed. Finally, we provied and off-line recursion of Ck for a class of multisensor linear systems with coupled measurement noises.
Minimum Delay Moving Object Detection
Lao, Dong
2017-05-14
This thesis presents a general framework and method for detection of an object in a video based on apparent motion. The object moves, at some unknown time, differently than the “background” motion, which can be induced from camera motion. The goal of proposed method is to detect and segment the object as soon it moves in an online manner. Since motion estimation can be unreliable between frames, more than two frames are needed to reliably detect the object. Observing more frames before declaring a detection may lead to a more accurate detection and segmentation, since more motion may be observed leading to a stronger motion cue. However, this leads to greater delay. The proposed method is designed to detect the object(s) with minimum delay, i.e., frames after the object moves, constraining the false alarms, defined as declarations of detection before the object moves or incorrect or inaccurate segmentation at the detection time. Experiments on a new extensive dataset for moving object detection show that our method achieves less delay for all false alarm constraints than existing state-of-the-art.
Dose variation during solar minimum
Energy Technology Data Exchange (ETDEWEB)
Gussenhoven, M.S.; Mullen, E.G.; Brautigam, D.H. (Phillips Lab., Geophysics Directorate, Hanscom Air Force Base, MA (US)); Holeman, E. (Boston Univ., MA (United States). Dept. of Physics)
1991-12-01
In this paper, the authors use direct measurement of dose to show the variation in inner and outer radiation belt populations at low altitude from 1984 to 1987. This period includes the recent solar minimum that occurred in September 1986. The dose is measured behind four thicknesses of aluminum shielding and for two thresholds of energy deposition, designated HILET and LOLET. The authors calculate an average dose per day for each month of satellite operation. The authors find that the average proton (HILET) dose per day (obtained primarily in the inner belt) increased systematically from 1984 to 1987, and has a high anticorrelation with sunspot number when offset by 13 months. The average LOLET dose per day behind the thinnest shielding is produced almost entirely by outer zone electrons and varies greatly over the period of interest. If any trend can be discerned over the 4 year period it is a decreasing one. For shielding of 1.55 gm/cm{sup 2} (227 mil) Al or more, the LOLET dose is complicated by contributions from {gt} 100 MeV protons and bremsstrahlung.
How Do Alternative Minimum Wage Variables Compare?
Sara Lemos
2005-01-01
Several minimum wage variables have been suggested in the literature. Such a variety of variables makes it difficult to compare the associated estimates across studies. One problem is that these estimates are not always calibrated to represent the effect of a 10% increase in the minimum wage. Another problem is that these estimates measure the effect of the minimum wage on the employment of different groups of workers. In this paper we critically compare employment effect estimates using five...
Minimum wages, globalization and poverty in Honduras
Gindling, T. H.; Terrell, Katherine
2008-01-01
To be competitive in the global economy, some argue that Latin American countries need to reduce or eliminate labour market regulations such as minimum wage legislation because they constrain job creation and hence increase poverty. On the other hand, minimum wage increases can have a direct positive impact on family income and may therefore help to reduce poverty. We take advantage of a complex minimum wage system in a poor country that has been exposed to the forces of globalization to test...
Tracking error with minimum guarantee constraints
Diana Barro; Elio Canestrelli
2008-01-01
In recent years the popularity of indexing has greatly increased in financial markets and many different families of products have been introduced. Often these products also have a minimum guarantee in the form of a minimum rate of return at specified dates or a minimum level of wealth at the end of the horizon. Period of declining stock market returns together with low interest rate levels on Treasury bonds make it more difficult to meet these liabilities. We formulate a dynamic asset alloca...
Effect of Pressure on Minimum Fluidization Velocity
Institute of Scientific and Technical Information of China (English)
Zhu Zhiping; Na Yongjie; Lu Qinggang
2007-01-01
Minimum fluidization velocity of quartz sand and glass bead under different pressures of 0.5, 1.0, 1.5 and 2.0 Mpa were investigated. The minimum fluidization velocity decreases with the increasing of pressure. The influence of pressure to the minimum fluidization velocities is stronger for larger particles than for smaller ones.Based on the test results and Ergun equation, an experience equation of minimum fluidization velocity is proposed and the calculation results are comparable to other researchers' results.
7 CFR 35.11 - Minimum requirements.
2010-01-01
..., Denmark, East Germany, England, Finland, France, Greece, Hungary, Iceland, Ireland, Italy, Liechtenstein..., Switzerland, Wales, West Germany, Yugoslavia), or Greenland shall meet each applicable minimum requirement...
Stochastic variational approach to minimum uncertainty states
Energy Technology Data Exchange (ETDEWEB)
Illuminati, F.; Viola, L. [Dipartimento di Fisica, Padova Univ. (Italy)
1995-05-21
We introduce a new variational characterization of Gaussian diffusion processes as minimum uncertainty states. We then define a variational method constrained by kinematics of diffusions and Schroedinger dynamics to seek states of local minimum uncertainty for general non-harmonic potentials. (author)
Minimum Wage Effects in the Longer Run
Neumark, David; Nizalova, Olena
2007-01-01
Exposure to minimum wages at young ages could lead to adverse longer-run effects via decreased labor market experience and tenure, and diminished education and training, while beneficial longer-run effects could arise if minimum wages increase skill acquisition. Evidence suggests that as individuals reach their late 20s, they earn less the longer…
New Minimum Wage Research: A Symposium.
Ehrenberg, Ronald G.; And Others
1992-01-01
Includes "Introduction" (Ehrenberg); "Effect of the Minimum Wage [MW] on the Fast-Food Industry" (Katz, Krueger); "Using Regional Variation in Wages to Measure Effects of the Federal MW" (Card); "Do MWs Reduce Employment?" (Card); "Employment Effects of Minimum and Subminimum Wages" (Neumark,…
5 CFR 630.206 - Minimum charge.
2010-01-01
... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Minimum charge. 630.206 Section 630.206 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE REGULATIONS ABSENCE AND LEAVE Definitions and General Provisions for Annual and Sick Leave § 630.206 Minimum charge. (a) Unless an agency...
Stochastic variational approach to minimum uncertainty states
Illuminati, F; Illuminati, F; Viola, L
1995-01-01
We introduce a new variational characterization of Gaussian diffusion processes as minimum uncertainty states. We then define a variational method constrained by kinematics of diffusions and Schr\\"{o}dinger dynamics to seek states of local minimum uncertainty for general non-harmonic potentials.
Monotonic Stable Solutions for Minimum Coloring Games
Hamers, H.J.M.; Miquel, S.; Norde, H.W.
2011-01-01
For the class of minimum coloring games (introduced by Deng et al. (1999)) we investigate the existence of population monotonic allocation schemes (introduced by Sprumont (1990)). We show that a minimum coloring game on a graph G has a population monotonic allocation scheme if and only if G is (P4,
The minimum work requirement for distillation processes
Energy Technology Data Exchange (ETDEWEB)
Yunus, Cerci; Yunus, A. Cengel; Byard, Wood [Nevada Univ., Las Vegas, NV (United States). Dept. of Mechanical Engineering
2000-07-01
A typical ideal distillation process is proposed and analyzed using the first and second-laws of thermodynamics with particular attention to the minimum work requirement for individual processes. The distillation process consists of an evaporator, a condenser, a heat exchanger, and a number of heaters and coolers. Several Carnot engines are also employed to perform heat interactions of the distillation process with the surroundings and determine the minimum work requirement for processes. The Carnot engines give the maximum possible work output or the minimum work input associated with the processes, and therefore the net result of these inputs and outputs leads to the minimum work requirement for the entire distillation process. It is shown that the minimum work relation for the distillation process is the same as the minimum work input relation found by Cerci et al [1] for an incomplete separation of incoming saline water, and depends only on the properties of the incoming saline water and the outgoing pure water and brine. Also, certain aspects of the minimum work relation found are discussed briefly. (authors)
EXPERIMENTAL STUDY OF MINIMUM IGNITION TEMPERATURE
Directory of Open Access Journals (Sweden)
Igor WACHTER
2015-12-01
Full Text Available The aim of this scientific paper is an analysis of the minimum ignition temperature of dust layer and the minimum ignition temperatures of dust clouds. It could be used to identify the threats in industrial production and civil engineering, on which a layer of combustible dust could occure. Research was performed on spent coffee grounds. Tests were performed according to EN 50281-2-1:2002 Methods for determining the minimum ignition temperatures of dust (Method A. Objective of method A is to determine the minimum temperature at which ignition or decomposition of dust occurs during thermal straining on a hot plate at a constant temperature. The highest minimum smouldering and carbonating temperature of spent coffee grounds for 5 mm high layer was determined at the interval from 280 °C to 310 °C during 600 seconds. Method B is used to determine the minimum ignition temperature of a dust cloud. Minimum ignition temperature of studied dust was determined to 470 °C (air pressure – 50 kPa, sample weight 0.3 g.
Does the Minimum Wage Cause Inefficient Rationing?
Institute of Scientific and Technical Information of China (English)
何满辉; 梁明秋
2008-01-01
By not allowing wages to dearthe labor market,the minimum wage could cause workers with low reservation wages to be rationed out while equally skilled woTkers with higher reservation wages are employed.I find that proxies for reservation wages of unskilled workers in high-impact stales did not rise relative to reservation wages in other states,suggesting that the increase in the minimum wage did not cause jobs to be allocated less efficiently.However,even if rationing is efficient,the minimum wage can still entail other efficiency costs.
Minimum emittance in TBA and MBA lattices
Xu, Gang; Peng, Yue-Mei
2015-03-01
For reaching a small emittance in a modern light source, triple bend achromats (TBA), theoretical minimum emittance (TME) and even multiple bend achromats (MBA) have been considered. This paper derived the necessary condition for achieving minimum emittance in TBA and MBA theoretically, where the bending angle of inner dipoles has a factor of 31/3 bigger than that of the outer dipoles. Here, we also calculated the conditions attaining the minimum emittance of TBA related to phase advance in some special cases with a pure mathematics method. These results may give some directions on lattice design.
Long Term Care Minimum Data Set (MDS)
U.S. Department of Health & Human Services — The Long-Term Care Minimum Data Set (MDS) is a standardized, primary screening and assessment tool of health status that forms the foundation of the comprehensive...
Quantitative Research on the Minimum Wage
Goldfarb, Robert S.
1975-01-01
The article reviews recent research examining the impact of minimum wage requirements on the size and distribution of teenage employment and earnings. The studies measure income distribution, employment levels and effect on unemployment. (MW)
Impact of the Minimum Wage on Compression.
Wolfe, Michael N.; Candland, Charles W.
1979-01-01
Assesses the impact of increases in the minimum wage on salary schedules, provides guidelines for creating a philosophy to deal with the impact, and outlines options and presents recommendations. (IRT)
Long Term Care Minimum Data Set (MDS)
U.S. Department of Health & Human Services — The Long-Term Care Minimum Data Set (MDS) is a standardized, primary screening and assessment tool of health status that forms the foundation of the comprehensive...
Minimum wages and employment in China
National Research Council Canada - National Science Library
Fang, Tony; Lin, Carl
2015-01-01
... that minimum wage changes led to significant adverse effects on employment in the Eastern and Central regions of China, and resulted in disemployment for females, young adults, and low-skilled workers...
Minimum Wage Policy and Country's Technical Efficiency
National Research Council Canada - National Science Library
Mohd Zaini Abd Karim; Sok-Gee Chan; Sallahuddin Hassan
2016-01-01
.... However, some quarters argued against the idea of a nationwide minimum wage asserting that it will lead to an increase in the cost of doing business and thus will hurt Malaysian competitiveness...
Graph theory for FPGA minimum configurations
Institute of Scientific and Technical Information of China (English)
Ruan Aiwu; Li Wenchang; Xiang Chuanyin; Song Jiangmin; Kang Shi; Liao Yongbo
2011-01-01
A traditional bottom-up modeling method for minimum configuration numbers is adopted for the study of FPGA minimum configurations.This method is limited ifa large number of LUTs and multiplexers are presented.Since graph theory has been extensively applied to circuit analysis and test,this paper focuses on the modeling FPGA configurations.In our study,an internal logic block and interconnections of an FPGA are considered as a vertex and an edge connecting two vertices in the graph,respectively.A top-down modeling method is proposed in the paper to achieve minimum configuration numbers for CLB and IOB.Based on the proposed modeling approach and exhaustive analysis,the minimum configuration numbers for CLB and IOB are five and three,respectively.
Natalino Lourenço Neto
2009-01-01
O objetivo deste estudo foi comparar a eficácia clínica e radiográfica do formocresol de Buckley diluído a 1/5, do Hidróxido de cálcio e do Hidróxido de cálcio precedido de um medicamento antiinflamatório o Otosporin® como agentes capeadores pulpares em dentes decíduos humanos acometidos por cárie extensa. Quarenta e cinco molares decíduos inferiores de 35 crianças com idades entre 5 e 9 anos foram criteriosamente selecionados. Os dentes foram aleatoriamente divididos nos grupos formocresol, ...
Ana Beatriz da Silveira Moretti
2008-01-01
O objetivo deste estudo foi comparar a eficácia clínica, radiográfica e microscópica do formocresol (FC) de Buckley diluído a 1/5, hidróxido de cálcio PA (HC) e Agregado Trióxido Mineral (MTA) como agentes capeadores pulpares em dentes decíduos humanos acometidos por cárie extensa. Quarenta e cinco molares decíduos inferiores de 23 crianças com idades entre 5 e 9 anos foram tratados pela técnica convencional de pulpotomia. Os dentes foram aleatoriamente divididos entre os grupos experimentais...
Price pass-through and minimum wages
Daniel Aaronson
1997-01-01
A textbook consequence of competitive markets is that an industry-wide increase in the price of inputs will be passed on to consumers through an increase in prices. This fundamental implication has been explored by researchers interested in who bears the burden of taxation and exchange rate fluctuations. However, little attention has focused on the price implications of minimum wage hikes. From a policy perspective, this is an oversight. Welfare analysis of minimum wage laws should not ignore...
The minimum wage and restaurant prices
Daniel Aaronson; Eric French; MacDonald, James M.
2004-01-01
Using both store-level and aggregated price data from the food away from home component of the Consumer Price Index survey, we show that restaurant prices rise in response to an increase in the minimum wage. These results hold up when using several different sources of variation in the data. We interpret these findings within a model of employment determination. The model implies that minimum wage hikes cause employment to fall and prices to rise if labor markets are competitive but potential...
Minimum Dominating Tree Problem for Graphs
Institute of Scientific and Technical Information of China (English)
LIN Hao; LIN Lan
2014-01-01
A dominating tree T of a graph G is a subtree of G which contains at least one neighbor of each vertex of G. The minimum dominating tree problem is to find a dominating tree of G with minimum number of vertices, which is an NP-hard problem. This paper studies some polynomially solvable cases, including interval graphs, Halin graphs, special outer-planar graphs and others.
Nowcasting daily minimum air and grass temperature
Savage, M. J.
2016-02-01
Site-specific and accurate prediction of daily minimum air and grass temperatures, made available online several hours before their occurrence, would be of significant benefit to several economic sectors and for planning human activities. Site-specific and reasonably accurate nowcasts of daily minimum temperature several hours before its occurrence, using measured sub-hourly temperatures hours earlier in the morning as model inputs, was investigated. Various temperature models were tested for their ability to accurately nowcast daily minimum temperatures 2 or 4 h before sunrise. Temperature datasets used for the model nowcasts included sub-hourly grass and grass-surface (infrared) temperatures from one location in South Africa and air temperature from four subtropical sites varying in altitude (USA and South Africa) and from one site in central sub-Saharan Africa. Nowcast models used employed either exponential or square root functions to describe the rate of nighttime temperature decrease but inverted so as to determine the minimum temperature. The models were also applied in near real-time using an open web-based system to display the nowcasts. Extrapolation algorithms for the site-specific nowcasts were also implemented in a datalogger in an innovative and mathematically consistent manner. Comparison of model 1 (exponential) nowcasts vs measured daily minima air temperatures yielded root mean square errors (RMSEs) errors for grass minimum temperature and the 4-h nowcasts.
Deep solar minimum and global climate changes
Directory of Open Access Journals (Sweden)
Ahmed A. Hady
2013-05-01
Full Text Available This paper examines the deep minimum of solar cycle 23 and its potential impact on climate change. In addition, a source region of the solar winds at solar activity minimum, especially in the solar cycle 23, the deepest during the last 500 years, has been studied. Solar activities have had notable effect on palaeoclimatic changes. Contemporary solar activity are so weak and hence expected to cause global cooling. Prevalent global warming, caused by building-up of green-house gases in the troposphere, seems to exceed this solar effect. This paper discusses this issue.
A minimum achievable PV electrical generating cost
Energy Technology Data Exchange (ETDEWEB)
Sabisky, E.S. [11 Carnation Place, Lawrenceville, NJ 08648 (United States)
1996-03-22
The role and share of photovoltaic (PV) generated electricity in our nation`s future energy arsenal is primarily dependent on its future production cost. This paper provides a framework for obtaining a minimum achievable electrical generating cost (a lower bound) for fixed, flat-plate photovoltaic systems. A cost of 2.8 $cent/kWh (1990$) was derived for a plant located in Southwestern USA sunshine using a cost of money of 8%. In addition, a value of 22 $cent/Wp (1990$) was estimated as a minimum module manufacturing cost/price
Weight-Constrained Minimum Spanning Tree Problem
Henn, Sebastian Tobias
2007-01-01
In an undirected graph G we associate costs and weights to each edge. The weight-constrained minimum spanning tree problem is to find a spanning tree of total edge weight at most a given value W and minimum total costs under this restriction. In this thesis a literature overview on this NP-hard problem, theoretical properties concerning the convex hull and the Lagrangian relaxation are given. We present also some in- and exclusion-test for this problem. We apply a ranking algorithm and the me...
Minimum training requirement in ultrasound imaging of peripheral arterial disease
DEFF Research Database (Denmark)
Eiberg, J P; Hansen, M A; Grønvall Rasmussen, J B
2008-01-01
To demonstrate the minimum training requirement when performing ultrasound of peripheral arterial disease.......To demonstrate the minimum training requirement when performing ultrasound of peripheral arterial disease....
Completeness properties of the minimum uncertainty states
Trifonov, D. A.
1993-01-01
The completeness properties of the Schrodinger minimum uncertainty states (SMUS) and of some of their subsets are considered. The invariant measures and the resolution unity measures for the set of SMUS are constructed and the representation of squeezing and correlating operators and SMUS as superpositions of Glauber coherent states on the real line is elucidated.
Minimum Wage Effects throughout the Wage Distribution
Neumark, David; Schweitzer, Mark; Wascher, William
2004-01-01
This paper provides evidence on a wide set of margins along which labor markets can adjust in response to increases in the minimum wage, including wages, hours, employment, and ultimately labor income. Not surprisingly, the evidence indicates that low-wage workers are most strongly affected, while higher-wage workers are little affected. Workers…
A Minimum Relative Entropy Principle for AGI
Ven, Antoine van de; Schouten, Ben
2010-01-01
In this paper the principle of minimum relative entropy (PMRE) is proposed as a fundamental principle and idea that can be used in the field of AGI. It is shown to have a very strong mathematical foundation, that it is even more fundamental then Bayes rule or MaxEnt alone and that it can be related
What's Happening in Minimum Competency Testing.
Frahm, Robert; Covington, Jimmie
An examination of the current status of minimum competency testing is presented in a series of short essays, which discuss case studies of individual school systems and state approaches. Sections are also included on the viewpoints of critics and supporters, teachers and teacher organizations, principals and students, and the federal government.…
Statistical inference of Minimum Rank Factor Analysis
Shapiro, A; Ten Berge, JMF
2002-01-01
For any given number of factors, Minimum Rank Factor Analysis yields optimal communalities for an observed covariance matrix in the sense that the unexplained common variance with that number of factors is minimized, subject to the constraint that both the diagonal matrix of unique variances and the
Minimum Bias and Underlying Event at CMS
Fano, Livio
2006-01-01
The prospects of measuring minimum bias collisions (MB) and studying the underlying event (UE) at CMS are discussed. Two methods are described. The first is based on the measurement of charged tracks in the transverse region with respect to a charge-particle jet. The second technique relies on the selection of muon-pair events from Drell-Yan process.
44 CFR 62.6 - Minimum commissions.
2010-10-01
... ADJUSTMENT OF CLAIMS Issuance of Policies § 62.6 Minimum commissions. (a) The earned commission which shall be paid to any property or casualty insurance agent or broker duly licensed by a state insurance regulatory authority, with respect to each policy or renewal the agent duly procures on behalf of the...
Context quantization by minimum adaptive code length
DEFF Research Database (Denmark)
Forchhammer, Søren; Wu, Xiaolin
2007-01-01
Context quantization is a technique to deal with the issue of context dilution in high-order conditional entropy coding. We investigate the problem of context quantizer design under the criterion of minimum adaptive code length. A property of such context quantizers is derived for binary symbols...
A Minimum Relative Entropy Principle for AGI
B.A.M. Ben Schouten; Antoine van de van de Ven
2010-01-01
In this paper the principle of minimum relative entropy (PMRE) is proposed as a fundamental principle and idea that can be used in the field of AGI. It is shown to have a very strong mathematical foundation, that it is even more fundamental then Bayes rule or MaxEnt alone and that it can be related
Statistical inference of Minimum Rank Factor Analysis
Shapiro, A; Ten Berge, JMF
For any given number of factors, Minimum Rank Factor Analysis yields optimal communalities for an observed covariance matrix in the sense that the unexplained common variance with that number of factors is minimized, subject to the constraint that both the diagonal matrix of unique variances and the
Time Crystals from Minimum Time Uncertainty
Faizal, Mir; Das, Saurya
2016-01-01
Motivated by the Generalized Uncertainty Principle, covariance, and a minimum measurable time, we propose a deformation of the Heisenberg algebra, and show that this leads to corrections to all quantum mechanical systems. We also demonstrate that such a deformation implies a discrete spectrum for time. In other words, time behaves like a crystal.
Minimum impact house prototype for sustainable building
Drexler, H.; Jauslin, D.
2010-01-01
The Minihouse is a prototupe for a sustainable townhouse. On a site of only 29 sqm it offers 154 sqm of urban life. The project 'Minimum Impact House' adresses two important questions: How do we provide living space in the cities without distroying the landscape? How to improve sustainably the ecolo
ASSESSMENT OF ANNUAL MINIMUM TEMPERATURE IN SOME ...
African Journals Online (AJOL)
USER
2016-04-11
Apr 11, 2016 ... This work attempts investigating the pattern of minimum temperature from 19 1 to 2006, an attempt was also .... Similarly the heavy cloud cover acts as blanket for terrestrial ... within a General Circulation Model. (GCM) can be ...
Minimum Competency Testing--Grading or Evaluation?
Prakash, Madhu Suri
The consequences of the minimum competency testing movement may bring into question the basic assumptions, goals, and expectations of our school system. The intended use of these tests is the assessment of students; the unintended consequence may be the assessment of the school system. There are two ways in which schools may fail in the context of…
Minimum intervention dentistry: periodontics and implant dentistry.
Darby, I B; Ngo, L
2013-06-01
This article will look at the role of minimum intervention dentistry in the management of periodontal disease. It will discuss the role of appropriate assessment, treatment and risk factors/indicators. In addition, the role of the patient and early intervention in the continuing care of dental implants will be discussed as well as the management of peri-implant disease.
Minimum output entropy of Gaussian channels
Lloyd, S; Maccone, L; Pirandola, S; Garcia-Patron, R
2009-01-01
We show that the minimum output entropy for all single-mode Gaussian channels is additive and is attained for Gaussian inputs. This allows the derivation of the channel capacity for a number of Gaussian channels, including that of the channel with linear loss, thermal noise, and linear amplification.
7 CFR 35.13 - Minimum quantity.
2010-01-01
... 7 Agriculture 2 2010-01-01 2010-01-01 false Minimum quantity. 35.13 Section 35.13 Agriculture Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE COMMODITY STANDARDS AND STANDARD CONTAINER REGULATIONS EXPORT...
7 CFR 33.10 - Minimum requirements.
2010-01-01
... Regulations of the Department of Agriculture AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing... ISSUED UNDER AUTHORITY OF THE EXPORT APPLE ACT Regulations § 33.10 Minimum requirements. No person shall... Early: Provided, That apples for export to Pacific ports of Russia shall grade at least U.S. Utility...
The periodicity of Grand Solar Minimum
Velasco Herrera, Victor Manuel
2016-07-01
The sunspot number is the most used index to quantify the solar activity. Nevertheless, the sunspot is a syn- thetic index and not a physical index. Therefore, we should be careful to use the sunspot number to quantify the low (high) solar activity. One of the major problems of using sunspot to quantify solar activity is that its minimum value is zero. This zero value hinders the reconstruction of the solar cycle during the Maunder minimum. All solar indexes can be used as analog signals, which can be easily converted into digital signals. In con- trast, the conversion of a digital signal into an analog signal is not in general a simple task. The sunspot number during the Maunder minimum can be studied as a digital signal of the solar activity In 1894, Maunder published a discovery that has maintained the Solar Physics in an impasse. In his fa- mous work on "A Prolonged Sunspot Minimum" Maunder wrote: "The sequence of maximum and minimum has, in fact, been unfailing during the present century [..] and yet there [..], the ordinary solar cycle was once interrupted, and one long period of almost unbroken quiescence prevailed". The search of new historical Grand solar minima has been one of the most important questions in Solar Physics. However, the possibility of estimating a new Grand solar minimum is even more valuable. Since solar activity is the result of electromagnetic processes; we propose to employ the power to quantify solar activity: this is a fundamental physics concept in electrodynamics. Total Solar Irradiance is the primary energy source of the Earth's climate system and therefore its variations can contribute to natural climate change. In this work, we propose to consider the fluctuations in the power of the Total Solar Irradiance as a physical measure of the energy released by the solar dynamo, which contributes to understanding the nature of "profound solar magnetic field in calm". Using a new reconstruction of the Total Solar Irradiance we found the
2007-01-01
In October 2006, the Economic Policy Institute released a â€œRaise the Minimum Wageâ€ statement signed by more than 650 individuals. Using an open-ended, non-anonymous questionnaire, we asked the signatories to explain their thinking on the issue. The questionnaire asked about the specific mechanisms at work, possible downsides, and whether the minimum wage violates liberty. Ninety-five participated. This article reports the responses. It also summarizes findings from minimum-wage surveys sin...
Minimum Wage Laws and the Distribution of Employment.
Lang, Kevin
The desirability of raising the minimum wage long revolved around just one question: the effect of higher minimum wages on the overall level of employment. An even more critical effect of the minimum wage rests on the composition of employment--who gets the minimum wage job. An examination of employment in eating and drinking establishments…
14 CFR 25.149 - Minimum control speed.
2010-01-01
... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Minimum control speed. 25.149 Section 25... Minimum control speed. (a) In establishing the minimum control speeds required by this section, the method... prevent a heading change of more than 20 degrees. (e) VMCG, the minimum control speed on the ground,...
49 CFR 538.5 - Minimum driving range.
2010-10-01
... 49 Transportation 6 2010-10-01 2010-10-01 false Minimum driving range. 538.5 Section 538.5... Minimum driving range. (a) The minimum driving range that a passenger automobile must have in order to be... electricity. (b) The minimum driving range that a passenger automobile using electricity as an...
12 CFR 3.6 - Minimum capital ratios.
2010-01-01
... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Minimum capital ratios. 3.6 Section 3.6 Banks and Banking COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY MINIMUM CAPITAL RATIOS; ISSUANCE OF DIRECTIVES Minimum Capital Ratios § 3.6 Minimum capital ratios. (a) Risk-based capital ratio....
Minimum and terminal velocities in projectile motion
Miranda, E N; Riba, R
2012-01-01
The motion of a projectile with horizontal initial velocity V0, moving under the action of the gravitational field and a drag force is studied analytically. As it is well known, the projectile reaches a terminal velocity Vterm. There is a curious result concerning the minimum speed Vmin; it turns out that the minimum velocity is lower than the terminal one if V0 > Vterm and is lower than the initial one if V0 < Vterm. These results show that the velocity is not a monotonous function. If the initial speed is not horizontal, there is an angle range where the velocity shows the same behavior mentioned previously. Out of that range, the volocity is a monotonous function. These results come out from numerical simulations.
DETERMINING MINIMUM HIKING TIME USING DEM
Directory of Open Access Journals (Sweden)
ZSOLT MAGYARI-SÁSKA
2012-11-01
Full Text Available Determining minimum hiking time using DEM. Minimum hiking time calculus can be used to assess the maximum area where a lost person can be. Such area delimitation can help rescue teams to efficiently organize their missions. The two well known walking time rules was used to determine, compare and correlate the obtained result in a test area. The calculated times has a high correlation coefficient which makes possible a precise conversion between Naismith and Tobler walking times. For delimiting the rescue area a graph based modeling from a raster layer was implemented using R environment. The main challenge in such a modeling is the efficient memory management as the use of Dijkstra algorithm on directional costgraph requires high memory resources.
Measurement of Minimum Bias Observables with ATLAS
Kvita, Jiri; The ATLAS collaboration
2017-01-01
The modelling of Minimum Bias (MB) is a crucial ingredient to learn about the description of soft QCD processes. It has also a significant relevance for the simulation of the environment at the LHC with many concurrent pp interactions (“pileup”). The ATLAS collaboration has provided new measurements of the inclusive charged particle multiplicity and its dependence on transverse momentum and pseudorapidity in special data sets with low LHC beam currents, recorded at center of mass energies of 8 TeV and 13 TeV. The measurements cover a wide spectrum using charged particle selections with minimum transverse momentum of both 100 MeV and 500 MeV and in various phase space regions of low and high charged particle multiplicities.
Bistable dielectric elastomer minimum energy structures
Zhao, Jianwen; Wang, Shu; McCoul, David; Xing, Zhiguang; Huang, Bo; Liu, Liwu; Leng, Jinsong
2016-07-01
Dielectric elastomer minimum energy structures (DEMES) can realize large angular deformations by small voltage-induced strains, which make them an attractive candidate for use as soft actuators. If the task only needs binary action, the bistable structure will be an efficient solution and can save energy because it requires only a very short duration of voltage to switch its state. To obtain bistable DEMES, a method to realize the two stable states of traditional DEMES is provided in this paper. Based on this, a type of symmetrical bistable DEMES is proposed, and the required actuation pulse duration is shorter than 0.1 s. When a suitable mass is attached to end of the DEMES, or two layers of dielectric elastomer are affixed to both sides of the primary frame, the DEMES can realize two stable states and can be switched by a suitable pulse duration. To calculate the required minimum pulse duration, a mathematical model is provided and validated by experiment.
Minimum Energy Demand Locomotion on Space Station
Directory of Open Access Journals (Sweden)
Wing Kwong Chung
2013-01-01
Full Text Available The energy of a space station is a precious resource, and the minimization of energy consumption of a space manipulator is crucial to maintain its normal functionalities. This paper first presents novel gaits for space manipulators by equipping a new gripping mechanism. With the use of wheels locomotion, lower energy demand gaits can be achieved. With the use of the proposed gaits, we further develop a global path planning algorithm for space manipulators which can plan a moving path on a space station with a minimum total energy demand. Different from existing approaches, we emphasize both the use of the proposed low energy demand gaits and the gaits composition during the path planning process. To evaluate the performance of the proposed gaits and path planning algorithm, numerous simulations are performed. Results show that the energy demand of both the proposed gaits and the resultant moving path is also minimum.
Minimum quality standards and international trade
DEFF Research Database (Denmark)
Baltzer, Kenneth Thomas
2011-01-01
This paper investigates the impact of a non-discriminating minimum quality standard (MQS) on trade and welfare when the market is characterized by imperfect competition and asymmetric information. A simple partial equilibrium model of an international Cournot duopoly is presented in which...... prefer different levels of regulation. As a result, international trade disputes are likely to arise even when regulation is non-discriminating....
Proposed production test for reducing minimum downtime
Energy Technology Data Exchange (ETDEWEB)
Jaklevick, J.F.
1961-11-29
The object of the production test described in this report is to evaluate the operational aspects of a proposed method for reducing minimum downtime. The excess xenon poisoning, which occurs during the first 32--38 hours after the shutdown of a reactor from present equilibrium levels, will be partially overridden by a central enriched zone whose added reactivity contribution would be compensated during normal operation by means of poison splines.
Minimum Description Length Shape and Appearance Models
DEFF Research Database (Denmark)
Thodberg, Hans Henrik
2003-01-01
The Minimum Description Length (MDL) approach to shape modelling is reviewed. It solves the point correspondence problem of selecting points on shapes defined as curves so that the points correspond across a data set. An efficient numerical implementation is presented and made available as open s...... source Matlab code. The problems with the early MDL approaches are discussed. Finally the MDL approach is extended to an MDL Appearance Model, which is proposed as a means to perform unsupervised image segmentation....
Minimum degree and density of binary sequences
DEFF Research Database (Denmark)
Brandt, Stephan; Müttel, J.; Rautenbach, D.
2010-01-01
For d,k∈N with k ≤ 2d, let g(d,k) denote the infimum density of binary sequences (x)∈{0,1} which satisfy the minimum degree condition σ(x+) ≥ k for all i∈Z with xi=1. We reduce the problem of computing g(d,k) to a combinatorial problem related to the generalized k-girth of a graph G which...
Time crystals from minimum time uncertainty
Faizal, Mir; Khalil, Mohammed M.; Das, Saurya
2016-01-01
Motivated by the Generalized Uncertainty Principle, covariance, and a minimum measurable time, we propose a deformation of the Heisenberg algebra and show that this leads to corrections to all quantum mechanical systems. We also demonstrate that such a deformation implies a discrete spectrum for time. In other words, time behaves like a crystal. As an application of our formalism, we analyze the effect of such a deformation on the rate of spontaneous emission in a hydrogen atom.
Time crystals from minimum time uncertainty
Energy Technology Data Exchange (ETDEWEB)
Faizal, Mir [University of Waterloo, Department of Physics and Astronomy, Waterloo, ON (Canada); Khalil, Mohammed M. [Alexandria University, Department of Electrical Engineering, Alexandria (Egypt); Das, Saurya [University of Lethbridge, Department of Physics and Astronomy, Lethbridge, AB (Canada)
2016-01-15
Motivated by the Generalized Uncertainty Principle, covariance, and a minimum measurable time, we propose a deformation of the Heisenberg algebra and show that this leads to corrections to all quantum mechanical systems. We also demonstrate that such a deformation implies a discrete spectrum for time. In other words, time behaves like a crystal. As an application of our formalism, we analyze the effect of such a deformation on the rate of spontaneous emission in a hydrogen atom. (orig.)
On the Minimum Induced Drag of Wings
Bowers, Albion H.
2011-01-01
Of all the types of drag, induced drag is associated with the creation and generation of lift over wings. Induced drag is directly driven by the span load that the aircraft is flying at. The tools by which to calculate and predict induced drag we use were created by Ludwig Prandtl in 1903. Within a decade after Prandtl created a tool for calculating induced drag, Prandtl and his students had optimized the problem to solve the minimum induced drag for a wing of a given span, formalized and written about in 1920. This solution is quoted in textbooks extensively today. Prandtl did not stop with this first solution, and came to a dramatically different solution in 1932. Subsequent development of this 1932 solution solves several aeronautics design difficulties simultaneously, including maximum performance, minimum structure, minimum drag loss due to control input, and solution to adverse yaw without a vertical tail. This presentation lists that solution by Prandtl, and the refinements by Horten, Jones, Kline, Viswanathan, and Whitcomb.
What causes geomagnetic activity during sunspot minimum
Kirov, Boian; Georgieva, Katya; Obridko, Vladimir
2014-01-01
The average geomagnetic activity during sunspot minimum has been continuously decreasing in the last four cycles. The geomagnetic activity is caused by both interplanetary disturbances - coronal mass ejections and high speed solar wind streams, and the background solar wind over which these disturbances ride. We show that the geomagnetic activity in cycle minimum does not depend on the number and parameters of coronal mass ejections or high speed solar wind streams, but on the background solar wind. The background solar wind has two components: slower and faster. The source of the slower component is the heliospheric current sheet, and of the faster one the polar coronal holes. It is supposed that the geomagnetic activity in cycle minimum is determined by the thickness of the heliospheric current sheet which is related to the portions of time the Earth spends in slow and in fast solar wind. We demonstrate that it is also determined by the parameters of these two components of the background solar wind which v...
The minimum entropy principle and task performance.
Guastello, Stephen J; Gorin, Hillary; Huschen, Samuel; Peters, Natalie E; Fabisch, Megan; Poston, Kirsten; Weinberger, Kelsey
2013-07-01
According to the minimum entropy principle, efficient cognitive performance is produced with a neurocognitive strategy that involves a minimum of degrees of freedom. Although high performance is often regarded as consistent performance as well, some variability in performance still remains which allows the person to adapt to changing goal conditions or fatigue. The present study investigated the connection between performance, entropy in performance, and four task-switching strategies. Fifty-one undergraduates performed 7 different computer-based cognitive tasks producing sets of 49 responses under instructional conditions requiring task quotas or no quotas. The temporal patterns of performance were analyzed using orbital decomposition to extract pattern types and lengths, which were then compared with regard to Shannon entropy, topological entropy, and overall performance. Task switching strategies from a previous study were available for the same participants as well. Results indicated that both topological entropy and Shannon entropy were negatively correlated with performance. Some task-switching strategies produced lower entropy in performance than others. Stepwise regression showed that the top three predictors of performance were Shannon entropy and arithmetic and spatial abilities. Additional implications for the prediction of work performance with cognitive ability measurements and the applicability of the minimum entropy principle to multidimensional performance criteria and team work are discussed.
Optimizing Reactors Selection and Sequencing:Minimum Cost versus Minimum Volume
Institute of Scientific and Technical Information of China (English)
Rachid Chebbi
2014-01-01
The present investigation targets minimum cost of reactors in series for the case of one single chemical reaction, considering plug flow and stirred tank reactor(s) in the sequence of flow reactors. Using Guthrie’s cost correlations three typical cases were considered based on the profile of the reaction rate reciprocal versus conversion. Significant differences were found compared to the classical approach targeting minimum total reactor volume.
The Wage and Employment Dynamics of Minimum Wage Workers
William E. Even; Macpherson, David A.
2004-01-01
This study uses 20 years of short panel data sets on minimum wage workers to examine the wage and employment dynamics of minimum wage workers. Compared to workers earning above the minimum wage, minimum wage workers differ substantially in several ways. First, minimum wage workers are much more likely to be new entrants and much more likely to exit the labor market. Second, changes in industry and occupation and access to job training are particularly important to improving the wages of minim...
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Employees subject to minimum wage or minimum wage and... Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS RECORDS TO BE KEPT BY EMPLOYERS General Requirements § 516.2 Employees subject to minimum wage or minimum wage...
Minimum QOS Parameter Set in Transport Layer
Institute of Scientific and Technical Information of China (English)
汪芸; 顾冠群
1997-01-01
QOS（Quality Of Service)parameter definitions are the basis of further QOS control.But QOS parameters defined by organizations such as ISO and ITU are incoherent and incompatible.It leads to the imefficiency of QOS controls.Based on the analysis of QOS parameters defined by ISO and ITU,this paper first promotes Minimum QOS Parameter Set in transport layer.It demonstrates that the parameters defined by ISO and ITU can be represented b parameters or a combination of parameters of the Set.The paper also expounds that the Set is open and manageable and it can be the potential unified base for QOS parameters.
Quantization of conductance minimum and index theorem
Ikegaya, Satoshi; Suzuki, Shu-Ichiro; Tanaka, Yukio; Asano, Yasuhiro
2016-08-01
We discuss the minimum value of the zero-bias differential conductance Gmin in a junction consisting of a normal metal and a nodal superconductor preserving time-reversal symmetry. Using the quasiclassical Green function method, we show that Gmin is quantized at (4 e2/h ) NZES in the limit of strong impurity scatterings in the normal metal at the zero temperature. The integer NZES represents the number of perfect transmission channels through the junction. An analysis of the chiral symmetry of the Hamiltonian indicates that NZES corresponds to the Atiyah-Singer index in mathematics.
Decentralized Pricing in Minimum Cost Spanning Trees
DEFF Research Database (Denmark)
Hougaard, Jens Leth; Moulin, Hervé; Østerdal, Lars Peter
In the minimum cost spanning tree model we consider decentralized pricing rules, i.e. rules that cover at least the ecient cost while the price charged to each user only depends upon his own connection costs. We de ne a canonical pricing rule and provide two axiomatic characterizations. First......, the canonical pricing rule is the smallest among those that improve upon the Stand Alone bound, and are either superadditive or piece-wise linear in connection costs. Our second, direct characterization relies on two simple properties highlighting the special role of the source cost....
Iterative Regularization with Minimum-Residual Methods
DEFF Research Database (Denmark)
Jensen, Toke Koldborg; Hansen, Per Christian
2007-01-01
We study the regularization properties of iterative minimum-residual methods applied to discrete ill-posed problems. In these methods, the projection onto the underlying Krylov subspace acts as a regularizer, and the emphasis of this work is on the role played by the basis vectors of these Krylov...... subspaces. We provide a combination of theory and numerical examples, and our analysis confirms the experience that MINRES and MR-II can work as general regularization methods. We also demonstrate theoretically and experimentally that the same is not true, in general, for GMRES and RRGMRES their success...... as regularization methods is highly problem dependent....
Quantum Monte Carlo for minimum energy structures
Wagner, Lucas K
2010-01-01
We present an efficient method to find minimum energy structures using energy estimates from accurate quantum Monte Carlo calculations. This method involves a stochastic process formed from the stochastic energy estimates from Monte Carlo that can be averaged to find precise structural minima while using inexpensive calculations with moderate statistical uncertainty. We demonstrate the applicability of the algorithm by minimizing the energy of the H2O-OH- complex and showing that the structural minima from quantum Monte Carlo calculations affect the qualitative behavior of the potential energy surface substantially.
First minimum bias physics results at LHCb
Dettori, Francesco
2010-01-01
We report on the first measurements of the LHCb experiment, as obtained from $pp$ collisions at $\\sqrt{s}$ = 0.9 TeV and 7 TeV recorded using a minimum bias trigger. In particular measurements of the absolute $K_S^0$ production cross section at $\\sqrt{s}$ = 0.9 TeV and of the $\\overline{\\Lambda/}\\Lambda$ ratio both at $\\sqrt{s}$ = 0.9 TeV and 7 TeV are discussed and preliminary results are presented
Iterative regularization with minimum-residual methods
DEFF Research Database (Denmark)
Jensen, Toke Koldborg; Hansen, Per Christian
2006-01-01
We study the regularization properties of iterative minimum-residual methods applied to discrete ill-posed problems. In these methods, the projection onto the underlying Krylov subspace acts as a regularizer, and the emphasis of this work is on the role played by the basis vectors of these Krylov...... subspaces. We provide a combination of theory and numerical examples, and our analysis confirms the experience that MINRES and MR-II can work as general regularization methods. We also demonstrate theoretically and experimentally that the same is not true, in general, for GMRES and RRGMRES - their success...... as regularization methods is highly problem dependent....
Aerobrake assembly with minimum Space Station accommodation
Katzberg, Steven J.; Butler, David H.; Doggett, William R.; Russell, James W.; Hurban, Theresa
1991-01-01
The minimum Space Station Freedom accommodations required for initial assembly, repair, and refurbishment of the Lunar aerobrake were investigated. Baseline Space Station Freedom support services were assumed, as well as reasonable earth-to-orbit possibilities. A set of three aerobrake configurations representative of the major themes in aerobraking were developed. Structural assembly concepts, along with on-orbit assembly and refurbishment scenarios were created. The scenarios were exercised to identify required Space Station Freedom accommodations. Finally, important areas for follow-on study were also identified.
Minimum Reservoir Water Level in Hydropower Dams
Sarkardeh, Hamed
2017-07-01
Vortex formation over the intakes is an undesirable phenomenon within the water withdrawal process from a dam reservoir. Calculating the minimum operating water level in power intakes by empirical equations is not a safe way and sometimes contains some errors. Therefore, current method to calculate the critical submergence of a power intake is construction of a scaled physical model in parallel with numerical model. In this research some proposed empirical relations for prediction of submergence depth in power intakes were validated with experimental data of different physical and numerical models of power intakes. Results showed that, equations which involved the geometry of intake have better correspondence with the experimental and numerical data.
Iterative Regularization with Minimum-Residual Methods
DEFF Research Database (Denmark)
Jensen, Toke Koldborg; Hansen, Per Christian
2007-01-01
We study the regularization properties of iterative minimum-residual methods applied to discrete ill-posed problems. In these methods, the projection onto the underlying Krylov subspace acts as a regularizer, and the emphasis of this work is on the role played by the basis vectors of these Krylov...... subspaces. We provide a combination of theory and numerical examples, and our analysis confirms the experience that MINRES and MR-II can work as general regularization methods. We also demonstrate theoretically and experimentally that the same is not true, in general, for GMRES and RRGMRES their success...
Defining a Minimum End Mill Diameter
Directory of Open Access Journals (Sweden)
A. E. Dreval'
2015-01-01
Full Text Available Industrial observations show that the standard mill designs in many cases do not provide a complete diversity of manufacturing operations, and a lot of enterprises are forced to design and manufacture special (original designs of tools. The information search has revealed a lack of end mill diameter calculations in publications. There is a proposal to calculate the end mill diameter either by empirical formulas [2, 3], or by selection from the tables [4].To estimate a minimum diameter of the end mill to perform the specified manufacturing operations based on the mill body strength the formulas are obtained. The initial data for calculation are the flow sheet of milling operation and properties of processed and tool materials. The end mill is regarded, as a cantilevered beam of the circular cross section having Dс diameter (mill core diameter with overhang Lв from rigid fixing and loaded by the maximum bending force and torque.In deriving the formulas were used the following well-reasoned assumptions based on the analysed sizes of the structural elements of the standard mills: a diameter of mill core is linearly dependent on the mill diameter and the overhang; the 4τ 2 to σ 2 4τ2 ratio is constant and equal to 0.065 for contour milling and 0.17 for slot milling.The formulas for calculating the minimum diameter are as follows: 3 обр в 1 121 1.1 K S L L D m C z for contour milling; 3 обр в 1 207 1.1 K S L L D m C z for slot milling.Obtained dependences that allow defining a minimum diameter of the end mill in terms of ensuring its strength can be used to design mills for contour milling with radius transition sections, holes of different diameters in the body parts and other cases when for processing a singlemill is preferable.Using the proposed dependencies for calculating a feed of the maximum tolerable strength is reasonable in designing the mills for slots.Assumptions used in deriving
The Risk Management of Minimum Return Guarantees
Directory of Open Access Journals (Sweden)
Antje Mahayni
2008-05-01
Full Text Available Contracts paying a guaranteed minimum rate of return and a fraction of a positive excess rate, which is specified relative to a benchmark portfolio, are closely related to unit-linked life-insurance products and can be considered as alternatives to direct investment in the underlying benchmark. They contain an embedded power option, and the key issue is the tractable and realistic hedging of this option, in order to rigorously justify valuation by arbitrage arguments and prevent the guarantees from becoming uncontrollable liabilities to the issuer. We show how to determine the contract parameters conservatively and implement robust risk-management strategies.
Optimal Succinctness for Range Minimum Queries
Fischer, Johannes
2008-01-01
For an array A of n objects from a totally ordered universe, a range minimum query (RMQ) asks for the position of the minimum element in the sub-array A[i,j]. We focus on the setting where the array $A$ is static and known in advance, and can hence be preprocessed into a scheme in order to answer future queries faster. We make the further assumption that the input array A cannot be used at query time. Under this assumption, a natural lower bound of 2n bits for RMQ-schemes exists. We give the first truly succinct preprocessing scheme for O(1)-RMQs. Its final space consumption is 2n+o(n) bits, thus being asymptotically optimal. We also give a simple linear-time construction algorithm for this scheme that needs only n+o(n) bits of space in addition to the 2n+o(n) bits needed for the final data structure, thereby lowering the peak space consumption of previous schemes from O(n\\log n) to O(n) bits. We also improve on LCA-computation in BPS- and DFUDS-encoded trees.
Constrained length minimum inductance gradient coil design.
Chronik, B A; Rutt, B K
1998-02-01
A gradient coil design algorithm capable of controlling the position of the homogeneous region of interest (ROI) with respect to the current-carrying wires is required for many advanced imaging and spectroscopy applications. A modified minimum inductance target field method that allows the placement of a set of constraints on the final current density is presented. This constrained current minimum inductance method is derived in the context of previous target field methods. Complete details are shown and all equations required for implementation of the algorithm are given. The method has been implemented on computer and applied to the design of both a 1:1 aspect ratio (length:diameter) central ROI and a 2:1 aspect ratio edge ROI gradient coil. The 1:1 design demonstrates that a general analytic method can be used to easily obtain very short gradient coil designs for use with specialized magnet systems. The edge gradient design demonstrates that designs that allow imaging of the neck region with a head sized gradient coil can be obtained, as well as other applications requiring edge-of-cylinder regions of uniformity.
Minimum Cost Homomorphisms to Reflexive Digraphs
Gupta, Arvind; Karimi, Mehdi; Rafiey, Arash
2007-01-01
For digraphs $G$ and $H$, a homomorphism of $G$ to $H$ is a mapping $f:\\ V(G)\\dom V(H)$ such that $uv\\in A(G)$ implies $f(u)f(v)\\in A(H)$. If moreover each vertex $u \\in V(G)$ is associated with costs $c_i(u), i \\in V(H)$, then the cost of a homomorphism $f$ is $\\sum_{u\\in V(G)}c_{f(u)}(u)$. For each fixed digraph $H$, the {\\em minimum cost homomorphism problem} for $H$, denoted MinHOM($H$), is the following problem. Given an input digraph $G$, together with costs $c_i(u)$, $u\\in V(G)$, $i\\in V(H)$, and an integer $k$, decide if $G$ admits a homomorphism to $H$ of cost not exceeding $k$. We focus on the minimum cost homomorphism problem for {\\em reflexive} digraphs $H$ (every vertex of $H$ has a loop). It is known that the problem MinHOM($H$) is polynomial time solvable if the digraph $H$ has a {\\em Min-Max ordering}, i.e., if its vertices can be linearly ordered by $<$ so that $i
The minimum jet power and equipartition
Zdziarski, Andrzej A
2014-01-01
We derive the minimum power of jets and their magnetic field strength based on their observed non-thermal synchrotron emission. The correct form of this method takes into account both the internal energy in the jet and the ion rest-mass energy associated with the bulk motion. The latter was neglected in a number of papers, which instead adopted the well-known energy-content minimization method. That method was developed for static sources, for which there is no bulk-motion component of the energy. In the case of electron power-law spectra with index >2 in ion-electron jets, the rest-mass component dominates. The minimization method for the jet power taking it into account was considered in some other work, but only based on either an assumption of a constant total synchrotron flux or a fixed range of the Lorentz factors. Instead, we base our method on an observed optically-thin synchrotron spectrum. We find the minimum jet power is independent of its radius when the rest-mass power dominates, which becomes th...
The Maunder minimum (1645--1715) was indeed a Grand minimum: A reassessment of multiple datasets
Usoskin, Ilya G; Asvestari, Eleanna; Hawkins, Ed; Käpylä, Maarit; Kovaltsov, Gennady A; Krivova, Natalie; Lockwood, Michael; Mursula, Kalevi; O'Reilly, Jezebel; Owens, Matthew; Scott, Chris J; Sokoloff, Dmitry D; Solanki, Sami K; Soon, Willie; Vaquero, José M
2015-01-01
Aims: Although the time of the Maunder minimum (1645--1715) is widely known as a period of extremely low solar activity, claims are still debated that solar activity during that period might still have been moderate, even higher than the current solar cycle #24. We have revisited all the existing pieces of evidence and datasets, both direct and indirect, to assess the level of solar activity during the Maunder minimum. Methods: We discuss the East Asian naked-eye sunspot observations, the telescopic solar observations, the fraction of sunspot active days, the latitudinal extent of sunspot positions, auroral sightings at high latitudes, cosmogenic radionuclide data as well as solar eclipse observations for that period. We also consider peculiar features of the Sun (very strong hemispheric asymmetry of sunspot location, unusual differential rotation and the lack of the K-corona) that imply a special mode of solar activity during the Maunder minimum. Results: The level of solar activity during the Maunder minimu...
Minimum Energy Requirements in Complex Distillation Arrangements
Energy Technology Data Exchange (ETDEWEB)
Halvorsen, Ivar J.
2001-07-01
Distillation is the most widely used industrial separation technology and distillation units are responsible for a significant part of the total heat consumption in the world's process industry. In this work we focus on directly (fully thermally) coupled column arrangements for separation of multicomponent mixtures. These systems are also denoted Petlyuk arrangements, where a particular implementation is the dividing wall column. Energy savings in the range of 20-40% have been reported with ternary feed mixtures. In addition to energy savings, such integrated units have also a potential for reduced capital cost, making them extra attractive. However, the industrial use has been limited, and difficulties in design and control have been reported as the main reasons. Minimum energy results have only been available for ternary feed mixtures and sharp product splits. This motivates further research in this area, and this thesis will hopefully give some contributions to better understanding of complex column systems. In the first part we derive the general analytic solution for minimum energy consumption in directly coupled columns for a multicomponent feed and any number of products. To our knowledge, this is a new contribution in the field. The basic assumptions are constant relative volatility, constant pressure and constant molar flows and the derivation is based on Underwood's classical methods. An important conclusion is that the minimum energy consumption in a complex directly integrated multi-product arrangement is the same as for the most difficult split between any pair of the specified products when we consider the performance of a conventional two-product column. We also present the Vmin-diagram, which is a simple graphical tool for visualisation of minimum energy related to feed distribution. The Vmin-diagram provides a simple mean to assess the detailed flow requirements for all parts of a complex directly coupled arrangement. The main purpose in
Minimum wage impacts on youth employment transitions, 1993-1999
Michele Campolieti; Tony Fang; Morley Gunderson
2005-01-01
The longitudinal nature of the Master File of the Survey of Labour and Income Dynamics (SLID) for the period 1993-9, enables comparing transitions from employment to non-employment for individuals affected by minimum wage changes with appropriate comparison groups not affected by minimum wages. This is based on the large number (24) of minimum wage changes that have occurred across the different provincial jurisdictions in Canada over the 1990s. The results indicate that the minimum wage incr...
Increasing the weight of minimum spanning trees
Energy Technology Data Exchange (ETDEWEB)
Frederickson, G.N.; Solis-Oba, R. [Purdue Univ., West Lafayette, IN (United States)
1996-12-31
Given an undirected connected graph G and a cost function for increasing edge weights, the problem of determining the maximum increase in the weight of the minimum spanning trees of G subject to a budget constraint is investigated. Two versions of the problem are considered. In the first, each edge has a cost function that is linear in the weight increase. An algorithm is presented that solves this problem in strongly polynomial time. In the second version, the edge weights are fixed but an edge can be removed from G at a unit cost. This version is shown to be NP-hard. An {Omega}(1/ log k)-approximation algorithm is presented for it, where k is the number of edges to be removed.
Duality of Maximum Entropy and Minimum Divergence
Directory of Open Access Journals (Sweden)
Shinto Eguchi
2014-06-01
Full Text Available We discuss a special class of generalized divergence measures by the use of generator functions. Any divergence measure in the class is separated into the difference between cross and diagonal entropy. The diagonal entropy measure in the class associates with a model of maximum entropy distributions; the divergence measure leads to statistical estimation via minimization, for arbitrarily giving a statistical model. The dualistic relationship between the maximum entropy model and the minimum divergence estimation is explored in the framework of information geometry. The model of maximum entropy distributions is characterized to be totally geodesic with respect to the linear connection associated with the divergence. A natural extension for the classical theory for the maximum likelihood method under the maximum entropy model in terms of the Boltzmann-Gibbs-Shannon entropy is given. We discuss the duality in detail for Tsallis entropy as a typical example.
Microbial oceanography of anoxic oxygen minimum zones
DEFF Research Database (Denmark)
Ulloa, Osvaldo; Canfield, Donald E; DeLong, Edward F
2012-01-01
Vast expanses of oxygen-deficient and nitrite-rich water define the major oxygen minimum zones (OMZs) of the global ocean. They support diverse microbial communities that influence the nitrogen economy of the oceans, contributing to major losses of fixed nitrogen as dinitrogen (N(2)) and nitrous...... environmental genomics and geochemical studies show the presence of other relevant processes, particularly those associated with the sulfur and carbon cycles. AMZs correspond to an intermediate state between two "end points" represented by fully oxic systems and fully sulfidic systems. Modern and ancient AMZs...... and sulfidic basins are chemically and functionally related. Global change is affecting the magnitude of biogeochemical fluxes and ocean chemical inventories, leading to shifts in AMZ chemistry and biology that are likely to continue well into the future....
Galactic Archaeology and Minimum Spanning Trees
Macfarlane, B A; Flynn, C M L
2015-01-01
Chemical tagging of stellar debris from disrupted open clusters and associations underpins the science cases for next-generation multi-object spectroscopic surveys. As part of the Galactic Archaeology project TraCD (Tracking Cluster Debris), a preliminary attempt at reconstructing the birth clouds of now phase-mixed thin disk debris is undertaken using a parametric minimum spanning tree (MST) approach. Empirically-motivated chemical abundance pattern uncertainties (for a 10-dimensional chemistry-space) are applied to NBODY6-realised stellar associations dissolved into a background sea of field stars, all evolving in a Milky Way potential. We demonstrate that significant population reconstruction degeneracies appear when the abundance uncertainties approach 0.1 dex and the parameterised MST approach is employed; more sophisticated methodologies will be required to ameliorate these degeneracies.
Attosecond pulse shaping around a Cooper minimum
Schoun, S B; Wheeler, J; Roedig, C; Agostini, P; DiMauro, L F; Schafer, K J; Gaarde, M B
2013-01-01
High harmonic generation (HHG) is used to measure the spectral phase of the recombination dipole matrix element (RDM) in argon over a broad frequency range that includes the 3p Cooper minimum (CM). The measured RDM phase agrees well with predictions based on the scattering phases and amplitudes of the interfering s- and d-channel contributions to the complementary photoionization process. The reconstructed attosecond bursts that underlie the HHG process show that the derivative of the RDM spectral phase, the group delay, does not have a straight-forward interpretation as an emission time, in contrast to the usual attochirp group delay. Instead, the rapid RDM phase variation caused by the CM reshapes the attosecond bursts.
Aligning Sequences by Minimum Description Length
Directory of Open Access Journals (Sweden)
John S. Conery
2008-01-01
Full Text Available This paper presents a new information theoretic framework for aligning sequences in bioinformatics. A transmitter compresses a set of sequences by constructing a regular expression that describes the regions of similarity in the sequences. To retrieve the original set of sequences, a receiver generates all strings that match the expression. An alignment algorithm uses minimum description length to encode and explore alternative expressions; the expression with the shortest encoding provides the best overall alignment. When two substrings contain letters that are similar according to a substitution matrix, a code length function based on conditional probabilities defined by the matrix will encode the substrings with fewer bits. In one experiment, alignments produced with this new method were found to be comparable to alignments from CLUSTALW. A second experiment measured the accuracy of the new method on pairwise alignments of sequences from the BAliBASE alignment benchmark.
A transcribed emergency record at minimum cost.
Klimt, C R; Becker, S; Fox, B S; Ensminger, F
1983-09-01
We have developed a new method of implementing a transcribed emergency record at minimum cost. Dictated emergency records are typed immediately by a transcriber located in the emergency department. This member of the medical record transcriber pool is given other non-urgent medical record material to type when there are no emergency records to type. The costs are reduced to the same level as routine medical records transcription. In 1982, 19,892 of the total 28,000 emergency records were transcribed by adding only 1.35 full-time equivalents (FTEs) to the transcriber pool. The remaining charts were handwritten because insufficient funds had been allocated to type all emergency records. The transcriber is capable of typing a maximum of 64 charts, averaging 13 lines (156 words) each, per 8-hour shift. The service can be phased in gradually as funds for transcribing the emergency record are allocated to the central transcriber pool.
Radiation belt dynamics during solar minimum
Energy Technology Data Exchange (ETDEWEB)
Gussenhoven, M.S.; Mullen, E.G. (Geophysics Lab., Air Force Systems Command, Hanscom AFB, MA (US)); Holeman, E. (Physics Dept., Boston College, Chestnut Hill, MA (US))
1989-12-01
Two types of temporal variation in the radiation belts are studied using low altitude data taken onboard the DMSP F7 satellite: those associated with the solar cycle and those associated with large magnetic storm effects. Over a three-year period from 1984 to 1987 and encompassing solar minimum, the protons in the heart of the inner belt increased at a rate of approximately 6% per year. Over the same period, outer zone electron enhancements declined both in number and peak intensity. During the large magnetic storm of February 1986, following the period of peak ring current intensity, a second proton belt with energies up to 50 MeV was found at magnetic latitudes between 45{degrees} and 55{degrees}. The belt lasted for more than 100 days. The slot region between the inner and outer electron belts collapsed by the merging of the two populations and did not reform for 40 days.
30 CFR 75.1431 - Minimum rope strength.
2010-07-01
... MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Hoisting and Mantrips Wire Ropes § 75.1431 Minimum rope... used for hoisting shall meet the minimum rope strength values obtained by the following formulas in...) For rope lengths 3,000 feet or greater: Minimum Value=Static Load×4.0 (b) Friction drum ropes. For...
30 CFR 77.1431 - Minimum rope strength.
2010-07-01
... Hoisting Wire Ropes § 77.1431 Minimum rope strength. At installation, the nominal strength (manufacturer's published catalog strength) of wire ropes used for hoisting shall meet the minimum rope strength values...=Static Load×4.0 (b) Friction drum ropes. For rope lengths less than 4,000 feet: Minimum Value=Static Load...
30 CFR 57.19021 - Minimum rope strength.
2010-07-01
... Hoisting Wire Ropes § 57.19021 Minimum rope strength. At installation, the nominal strength (manufacturer's published catalog strength) of wire ropes used for hoisting shall meet the minimum rope strength values...=Static Load×4.0. (b) Friction drum ropes. For rope lengths less than 4,000 feet: Minimum Value=Static...
Minimum Wages and Skill Acquisition: Another Look at Schooling Effects.
Neumark, David; Wascher, William
2003-01-01
Examines the effects of minimum wage on schooling, seeking to reconcile some of the contradictory results in recent research using Current Population Survey data from the late 1970s through the 1980s. Findings point to negative effects of minimum wages on school enrollment, bolstering the findings of negative effects of minimum wages on enrollment…
Employment Effects of Minimum and Subminimum Wages. Recent Evidence.
Neumark, David
Using a specially constructed panel data set on state minimum wage laws and labor market conditions, Neumark and Wascher (1992) presented evidence that countered the claim that minimum wages could be raised with no cost to employment. They concluded that estimates indicating that minimum wages reduced employment on the order of 1-2 percent for a…
29 CFR 783.43 - Computation of seaman's minimum wage.
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Computation of seaman's minimum wage. 783.43 Section 783.43...'s minimum wage. Section 6(b) requires, under paragraph (2) of the subsection, that an employee...'s minimum wage requirements by reason of the 1961 Amendments (see §§ 783.23 and 783.26). Although...
41 CFR 50-201.1101 - Minimum wages.
2010-07-01
... 41 Public Contracts and Property Management 1 2010-07-01 2010-07-01 true Minimum wages. 50-201... Contracts PUBLIC CONTRACTS, DEPARTMENT OF LABOR 201-GENERAL REGULATIONS § 50-201.1101 Minimum wages. Determinations of prevailing minimum wages or changes therein will be published in the Federal Register by the...
29 CFR 4.159 - General minimum wage.
2010-07-01
... 29 Labor 1 2010-07-01 2010-07-01 true General minimum wage. 4.159 Section 4.159 Labor Office of... General minimum wage. The Act, in section 2(b)(1), provides generally that no contractor or subcontractor... a contract less than the minimum wage specified under section 6(a)(1) of the Fair Labor Standards...
Minimum Wage Effects on Educational Enrollments in New Zealand
Pacheco, Gail A.; Cruickshank, Amy A.
2007-01-01
This paper empirically examines the impact of minimum wages on educational enrollments in New Zealand. A significant reform to the youth minimum wage since 2000 has resulted in some age groups undergoing a 91% rise in their real minimum wage over the last 10 years. Three panel least squares multivariate models are estimated from a national sample…
14 CFR 23.1513 - Minimum control speed.
2010-01-01
... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Minimum control speed. 23.1513 Section 23.1513 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Information § 23.1513 Minimum control speed. The minimum control speed V MC, determined under § 23.149,...
14 CFR 25.1513 - Minimum control speed.
2010-01-01
... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Minimum control speed. 25.1513 Section 25.1513 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT... Limitations § 25.1513 Minimum control speed. The minimum control speed V MC determined under § 25.149 must...
14 CFR 29.49 - Performance at minimum operating speed.
2010-01-01
... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Performance at minimum operating speed. 29... minimum operating speed. (a) For each Category A helicopter, the hovering performance must be determined... than helicopters, the steady rate of climb at the minimum operating speed must be determined over...
14 CFR 27.49 - Performance at minimum operating speed.
2010-01-01
... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Performance at minimum operating speed. 27... minimum operating speed. (a) For helicopters— (1) The hovering ceiling must be determined over the ranges... climb at the minimum operating speed must be determined over the ranges of weight, altitude,...
12 CFR 931.3 - Minimum investment in capital stock.
2010-01-01
... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Minimum investment in capital stock. 931.3... CAPITAL STANDARDS FEDERAL HOME LOAN BANK CAPITAL STOCK § 931.3 Minimum investment in capital stock. (a) A Bank shall require each member to maintain a minimum investment in the capital stock of the Bank,...
24 CFR 891.145 - Owner deposit (Minimum Capital Investment).
2010-04-01
... General Program Requirements § 891.145 Owner deposit (Minimum Capital Investment). As a Minimum Capital... Investment shall be one-half of one percent (0.5%) of the HUD-approved capital advance, not to exceed $25,000. ... 24 Housing and Urban Development 4 2010-04-01 2010-04-01 false Owner deposit (Minimum...
12 CFR 263.82 - Establishment of minimum capital levels.
2010-01-01
... Maintain Adequate Capital § 263.82 Establishment of minimum capital levels. The Board has established minimum capital levels for state member banks and bank holding companies in its Capital Adequacy... 12 Banks and Banking 3 2010-01-01 2010-01-01 false Establishment of minimum capital levels....
The generalized minimum spanning tree polytope and related polytopes
Pop, P.C.
2001-01-01
The Generalized Minimum Spanning Tree problem denoted by GMST is a variant of the classical Minimum Spanning Tree problem in which nodes are partitioned into clusters and the problem calls for a minimum cost tree spanning at least one node from each cluster. A different version of the problem, calle
29 CFR 505.3 - Prevailing minimum compensation.
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Prevailing minimum compensation. 505.3 Section 505.3 Labor... HUMANITIES § 505.3 Prevailing minimum compensation. (a)(1) In the absence of an alternative determination...)(2) of this section, the prevailing minimum compensation required to be paid under the Act to...
7 CFR 953.43 - Minimum standards of quality.
2010-01-01
... 7 Agriculture 8 2010-01-01 2010-01-01 false Minimum standards of quality. 953.43 Section 953.43... SOUTHEASTERN STATES Order Regulating Handling Regulations § 953.43 Minimum standards of quality. (a) Recommendation. Whenever the committee deems it advisable to establish and maintain minimum standards of...
27 CFR 40.256 - Minimum manufacturing and activity requirements.
2010-04-01
... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Minimum manufacturing and... Provisions Relating to Operations § 40.256 Minimum manufacturing and activity requirements. The minimum manufacturing and activity requirement prescribed in § 40.61(b) of this part is a continuing condition of...
The generalized minimum spanning tree polytope and related polytopes
Pop, P.C.
2001-01-01
The Generalized Minimum Spanning Tree problem denoted by GMST is a variant of the classical Minimum Spanning Tree problem in which nodes are partitioned into clusters and the problem calls for a minimum cost tree spanning at least one node from each cluster. A different version of the problem, calle
A minimum income for healthy living.
Morris, J N; Donkin, A J; Wonderling, D; Wilkinson, P; Dowler, E A
2000-12-01
Half a century of research has provided consensual evidence of major personal requisites of adult health in nutrition, physical activity and psychosocial relations. Their minimal money costs, together with those of a home and other basic necessities, indicate disposable income that is now essential for health. In a first application we identified such representative minimal costs for healthy, single, working men aged 18-30, in the UK. Costs were derived from ad hoc survey, relevant figures in the national Family Expenditure Survey, and by pragmatic decision for the few minor items where survey data were not available. Minimum costs were assessed at 131.86 pound sterling per week (UK April 1999 prices). Component costs, especially those of housing (which represents around 40% of this total), depend on region and on several assumptions. By varying these a range of totals from 106.47 pound sterling to 163.86 pound sterling per week was detailed. These figures compare, 1999, with the new UK national minimum wage, after statutory deductions, of pound 105.84 at 18-21 years and 121.12 pound sterling at 22+ years for a 38 hour working week. Corresponding basic social security rates are 40.70 pound sterling to 51.40 pound sterling per week. Accumulating science means that absolute standards of living, "poverty", minimal official incomes and the like, can now be assessed by objective measurement of the personal capacity to meet the costs of major requisites of healthy living. A realistic assessment of these costs is presented as an impetus to public discussion. It is a historical role of public health as social medicine to lead in public advocacy of such a national agenda.
Michel, Loïc
2012-01-01
This preliminary work presents a simple derivation of the standard model-free control in order to control switching minimum phase, non-minimum phase and time-delay systems. The robustness of the proposed method is studied in simulation.
Wage discrimination and partial compliance with the minimum wage law
Yang-Ming Chang; Bhavneet Walia
2007-01-01
This paper presents a simple model to characterize the discriminatory behavior of a non-complying firm in a minimum-wage economy. In the analysis, the violating firm pays one â€œfavoredâ€ group of workers the statutory minimum and the other â€œnon-favoredâ€ group of workers a sub-minimum. We find conditions under which law enforcement is ineffective in improving the between-group wage differentials. We show that an increase in the minimum wage raises the sub-minimum wage and employment of wor...
Minimum-energy wavelet frame on the interval
Institute of Scientific and Technical Information of China (English)
GAO XiePing; CAO ChunHong
2008-01-01
The construction and properties of interval minimum-energy wavelet frame are systematically studied in this paper.They are as follows:1) give the definition of interval minimum-energy wavelet frame;2) give the necessary and sufficient conditions for the minimum-energy frames for L2[0,1];3) present the construction algorithm for minimum-energy wavelet frame associated with refinable functions on the interval with any support γ;4) give the decomposition and reconstruction formulas of the minimum-energy frame on the interval [0,1].
Rock climbing: A local-global algorithm to compute minimum energy and minimum free energy pathways
Templeton, Clark; Chen, Szu-Hua; Fathizadeh, Arman; Elber, Ron
2017-10-01
The calculation of minimum energy or minimum free energy paths is an important step in the quantitative and qualitative studies of chemical and physical processes. The computations of these coordinates present a significant challenge and have attracted considerable theoretical and computational interest. Here we present a new local-global approach to study reaction coordinates, based on a gradual optimization of an action. Like other global algorithms, it provides a path between known reactants and products, but it uses a local algorithm to extend the current path in small steps. The local-global approach does not require an initial guess to the path, a major challenge for global pathway finders. Finally, it provides an exact answer (the steepest descent path) at the end of the calculations. Numerical examples are provided for the Mueller potential and for a conformational transition in a solvated ring system.
ON THE INVERSE MINIMUM SPANNING TREE PROBLEM WITH MINIMUM NUMBER OF PERTURBED EDGES
Institute of Scientific and Technical Information of China (English)
Bangyi LI; Zhaohan SHENG
2003-01-01
Let G= be a network with the vertex set V, the edge set E and the length vector L, andlet T* be a prior determined spanning tree of G. The inverse minimum spanning tree problem withminimum number of perturbed edges is to perturb the length vector L to L+ δ, such that T* is one ofminimum spanning trees under the length vector L+ δ and the number of perturbed edges is minimum.This paper establishes a mathematical model for this problem and transforms it into a minimumvertex covering problem in a bipartite graph Go, a path-graph. Thus a strongly polynomial algorithmwith time complexity O(mn2) can be designed by using Hungarian method.
CVs Around the Minimum Orbital Period
Directory of Open Access Journals (Sweden)
S. Zharikov
2015-02-01
Full Text Available We discussed features of Cataclysmic Variables at the period minimum. In general, most of them must be WZ Sge-type objects. Main characteristics of the prototype star (WZ Sge are discussed. A part of WZ Sge-type objects has evolved past the period limit and formed the bounce back systems. We also explore conditions and structure of accretion disks in such systems. We show that the accretion disk in a system with extreme mass ratio grows in size reaching a 2:1 resonance radius and are relatively cool. They also become largely optically thin in the continuum, contributing to the total flux less than the stellar components of the system. In contrast, the viscosity and the temperature in spiral arms formed at the outer edge of the disk are higher and their contribution in continuum plays an increasingly important role. We model such disks and generate light curves which successfully simulate the observed double-humped light curves in the quiescence.
Minimum degree condition forcing complete graph immersion
DeVos, Matt; Fox, Jacob; McDonald, Jessica; Mohar, Bojan; Scheide, Diego
2011-01-01
An immersion of a graph $H$ into a graph $G$ is a one-to-one mapping $f:V(H) \\to V(G)$ and a collection of edge-disjoint paths in $G$, one for each edge of $H$, such that the path $P_{uv}$ corresponding to edge $uv$ has endpoints $f(u)$ and $f(v)$. The immersion is strong if the paths $P_{uv}$ are internally disjoint from $f(V(H))$. It is proved that for every positive integer $t$, every simple graph of minimum degree at least $200t$ contains a strong immersion of the complete graph $K_t$. For dense graphs one can say even more. If the graph has order $n$ and has $2cn^2$ edges, then there is a strong immersion of the complete graph on at least $c^2 n$ vertices in $G$ in which each path $P_{uv}$ is of length 2. As an application of these results, we resolve a problem raised by Paul Seymour by proving that the line graph of every simple graph with average degree $d$ has a clique minor of order at least $cd^{3/2}$, where $c>0$ is an absolute constant. For small values of $t$, $1\\le t\\le 7$, every simple graph of...
Minimum Bias Measurements at the LHC
Kar, Deepak; The ATLAS collaboration
2016-01-01
Inclusive charged particle measurements at hadron colliders probe the low-energy nonperturbative region of QCD. Pseudorapidity distributions of charged-particles produced in pp collisions at 13 TeV have been measured by the CMS experiment. The ATLAS collaboration has measured the inclusive charged particle multiplicity and its dependence on transverse momentum and pseudorapidity in special data sets with low LHC beam current, recorded at a center-of-mass energy of 13 TeV. The measurements present the first detailed studies in inclusive phase spaces with a minimum transverse momentum of 100 MeV and 500 MeV. The distribution of electromagnetic and hadronic energy in the very forward phase-space has been measured with the CASTOR calorimeters located at a pseudorapidity of -5.2 to -6.6 in the very forward region of CMS. The energy distributions are very powerful benchmarks to study the performance of MPI in hadronic interactions models at 13 TeV collision energy. All measurements are compared with predictions of ...
A minimum mass nebula for M dwarfs
Gaidos, E.
2017-09-01
Recently revealed differences in planets around M dwarf versus solar-type stars could arise from differences in their primordial discs and surveys of T Tauri stars find a correlation between stellar mass and disc mass. 'Minimum' discs have been reconstructed for the Solar system and solar-type stars and here this exercise is performed for M dwarfs using Kepler-detected planets. Distribution of planet mass between current orbits produces a disc with total mass of ≈0.009 M⊙ and a power-law profile with index α = 2.2. Disc reconstruction from the output of a forward model of planet formation indicates that the effect of detection bias on disc profile is slight and that the observed scatter in planet masses and semimajor axes are consistent with a universal disc profile. This nominal M dwarf disc is more centrally concentrated than those inferred around the solar-type stars observed by Kepler, and the mass surface density beyond 0.02 au is sufficient for in situ accretion of planets as single embryos. The mass of refractory solids within 0.5 au is 5.6 M⊕ compared to 4 M⊕ for solar-type stars in contrast with the trend with total disc mass. The total solid beyond 0.5 au is sufficient for the core of at least one giant planet.
Topside measurements at Jicamarca during solar minimum
Directory of Open Access Journals (Sweden)
D. L. Hysell
2009-01-01
Full Text Available Long-pulse topside radar data acquired at Jicamarca and processed using full-profile analysis are compared to data processed using more conventional, range-gated approaches and with analytic and computational models. The salient features of the topside observations include a dramatic increase in the T_{e}/T_{i} temperature ratio above the F peak at dawn and a local minimum in the topside plasma temperature in the afternoon. The hydrogen ion fraction was found to exhibit hyperbolic tangent-shaped profiles that become shallow (gradually changing above the O^{+}-H^{+} transition height during the day. The profile shapes are generally consistent with diffusive equilibrium, although shallowing to the point of changes in inflection can only be accounted for by taking the effects of E×B drifts and meridional winds into account. The SAMI2 model demonstrates this as well as the substantial effect that drifts and winds can have on topside temperatures. Significant quiet-time variability in the topside composition and temperatures may be due to variability in the mechanical forcing. Correlations between topside measurements and magnetometer data at Jicamarca support this hypothesis.
Minimum information about a bioactive entity (MIABE).
Orchard, Sandra; Al-Lazikani, Bissan; Bryant, Steve; Clark, Dominic; Calder, Elizabeth; Dix, Ian; Engkvist, Ola; Forster, Mark; Gaulton, Anna; Gilson, Michael; Glen, Robert; Grigorov, Martin; Hammond-Kosack, Kim; Harland, Lee; Hopkins, Andrew; Larminie, Christopher; Lynch, Nick; Mann, Romeena K; Murray-Rust, Peter; Lo Piparo, Elena; Southan, Christopher; Steinbeck, Christoph; Wishart, David; Hermjakob, Henning; Overington, John; Thornton, Janet
2011-08-31
Bioactive molecules such as drugs, pesticides and food additives are produced in large numbers by many commercial and academic groups around the world. Enormous quantities of data are generated on the biological properties and quality of these molecules. Access to such data - both on licensed and commercially available compounds, and also on those that fail during development - is crucial for understanding how improved molecules could be developed. For example, computational analysis of aggregated data on molecules that are investigated in drug discovery programmes has led to a greater understanding of the properties of successful drugs. However, the information required to perform these analyses is rarely published, and when it is made available it is often missing crucial data or is in a format that is inappropriate for efficient data-mining. Here, we propose a solution: the definition of reporting guidelines for bioactive entities - the Minimum Information About a Bioactive Entity (MIABE) - which has been developed by representatives of pharmaceutical companies, data resource providers and academic groups.
Microbial oceanography of anoxic oxygen minimum zones.
Ulloa, Osvaldo; Canfield, Donald E; DeLong, Edward F; Letelier, Ricardo M; Stewart, Frank J
2012-10-02
Vast expanses of oxygen-deficient and nitrite-rich water define the major oxygen minimum zones (OMZs) of the global ocean. They support diverse microbial communities that influence the nitrogen economy of the oceans, contributing to major losses of fixed nitrogen as dinitrogen (N(2)) and nitrous oxide (N(2)O) gases. Anaerobic microbial processes, including the two pathways of N(2) production, denitrification and anaerobic ammonium oxidation, are oxygen-sensitive, with some occurring only under strictly anoxic conditions. The detection limit of the usual method (Winkler titrations) for measuring dissolved oxygen in seawater, however, is much too high to distinguish low oxygen conditions from true anoxia. However, new analytical technologies are revealing vanishingly low oxygen concentrations in nitrite-rich OMZs, indicating that these OMZs are essentially anoxic marine zones (AMZs). Autonomous monitoring platforms also reveal previously unrecognized episodic intrusions of oxygen into the AMZ core, which could periodically support aerobic metabolisms in a typically anoxic environment. Although nitrogen cycling is considered to dominate the microbial ecology and biogeochemistry of AMZs, recent environmental genomics and geochemical studies show the presence of other relevant processes, particularly those associated with the sulfur and carbon cycles. AMZs correspond to an intermediate state between two "end points" represented by fully oxic systems and fully sulfidic systems. Modern and ancient AMZs and sulfidic basins are chemically and functionally related. Global change is affecting the magnitude of biogeochemical fluxes and ocean chemical inventories, leading to shifts in AMZ chemistry and biology that are likely to continue well into the future.
Redefining the limit dates for the Maunder Minimum
Vaquero, J M
2014-01-01
The Maunder Minimum corresponds to a prolonged minimum of solar activity a phenomenon that is of particular interest to many branches of natural and social sciences commonly considered to extend from 1645 until 1715. However, our knowledge of past solar activity has improved significantly in recent years and, thus, more precise dates for the onset and termination of this particularly episode of our Sun can be established. Based on the simultaneous analysis of distinct proxies we propose a redefinition of the Maunder Minimum period with the core "Deep Maunder Minimum" spanning from 1645 to 1700 (that corresponds to the Grand Minimum state) and a wider "Extended Maunder Minimum" for the longer period 1618-1723 that includes the transition periods.
Minimum-cost quantum measurements for quantum information
Wallden, Petros; Dunjko, Vedran; Andersson, Erika
2014-01-01
Knowing about optimal quantum measurements is important for many applications in quantum information and quantum communication. However, deriving optimal quantum measurements is often difficult. We present a collection of results for minimum-cost quantum measurements, and give examples of how they can be used. Among other results, we show that a minimum-cost measurement for a set of given pure states is formally equivalent to a minimum-error measurement for certain mixed states of those same ...
The impact of minimum wage on female employment in Japan
KAWAGUCHI, Daiji; Yamada, Ken
2004-01-01
The statutory minimum wage in Japan is revised every year and increases by almost the same amount across prefectures, regardless of the disparity in the wage distribution across prefectures. Due to this feature of minimum wagesetting, the minimum wage cuts into the wage distribution deeply in rural Japan. We examine the impact of the minimum wage on employment, focus-ing on middle-aged women, who are known to be typical, low-wage workers in Japan. The results, based on a panel estimation, sug...
Decision trees with minimum average depth for sorting eight elements
AbouEisha, Hassan
2015-11-19
We prove that the minimum average depth of a decision tree for sorting 8 pairwise different elements is equal to 620160/8!. We show also that each decision tree for sorting 8 elements, which has minimum average depth (the number of such trees is approximately equal to 8.548×10^326365), has also minimum depth. Both problems were considered by Knuth (1998). To obtain these results, we use tools based on extensions of dynamic programming which allow us to make sequential optimization of decision trees relative to depth and average depth, and to count the number of decision trees with minimum average depth.
Minimum Wages and Anti-Poverty Policies (Japanese)
Ohtake, Fumio
2013-01-01
This paper examines the effectiveness of minimum wages as an anti-poverty policy based on the textbook labor market model and recent empirical research. In a competitive labor market, it is well known that minimum wages either have a negative or no effect on employment. In a monopsony labor market, a rise in the minimum wage rate may increase both wages and employment. Although most of the empirical research on this topic overseas show that an increase in minimum wages decreases employment, s...
Partridge, Mark D.; Partridge, Jamie S.
1999-01-01
Several recent studies contend that falling real minimum wage rates are an important factor behind rising wage inequality and increasing poverty rates. Other studies find the more conventional result that they have very little influence on poverty and inequality, but these studies are generally based on simulated labor market responses. This study examines the influence of minimum wage rates on poverty rates and family income inequality using state-level minimum wages. The methodology has the...
Stephen Machin; Alan Manning; Lupin Rahman
2002-01-01
Between 1993 and April 1999 there was no minimum wage in the United Kingdom (except in agriculture). In this paper we study the effects of the introduction of a National Minimum Wage (NMW) in April 1999 on one heavily affected sector, the residential care homes industry. This sector contains a large number of low paid workers and as such can be viewed as being very vulnerable to minimum wage legislation. We look at the impact on both wages and employment. Our results suggest that the minimum ...
14 CFR 93.311 - Minimum terrain clearance.
2010-01-01
... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Minimum terrain clearance. 93.311 Section 93.311 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED... of Grand Canyon National Park, AZ § 93.311 Minimum terrain clearance. Except in an emergency,...
33 CFR 157.455 - Minimum under-keel clearance.
2010-07-01
... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Minimum under-keel clearance. 157... § 157.455 Minimum under-keel clearance. (a) The owner or operator of a tankship, that is not fitted with... written under-keel clearance guidance that includes— (1) Factors to consider when calculating the...
Solution of the Schroedinger equation for a double minimum potential
Goorvitch, D.; Galant, D. C.
1992-01-01
We apply Richardson's extrapolation to zero mesh size to calculate the dissociation energies and wavefunctions of a double minimum potential curve for the E,F1Sigma(+)g state of H2. We demonstrate that a double minimum potential presents no difficulties and that this extrapolation method is to be preferred over a quadratic extrapolation or the use of a basis expansion.
46 CFR 111.60-4 - Minimum cable conductor size.
2010-10-01
... 46 Shipping 4 2010-10-01 2010-10-01 false Minimum cable conductor size. 111.60-4 Section 111.60-4...-GENERAL REQUIREMENTS Wiring Materials and Methods § 111.60-4 Minimum cable conductor size. Each cable conductor must be #18 AWG (0.82 mm2) or larger except— (a) Each power and lighting cable conductor must...
5 CFR 551.601 - Minimum age standards.
2010-01-01
... ADMINISTRATION UNDER THE FAIR LABOR STANDARDS ACT Child Labor § 551.601 Minimum age standards. (a) 16-year... subject to its child labor provisions, with certain exceptions not applicable here. (b) 18-year minimum... occupation found and declared by the Secretary of Labor to be particularly hazardous for the employment...
42 CFR 84.197 - Respirator containers; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Respirator containers; minimum requirements. 84.197... Cartridge Respirators § 84.197 Respirator containers; minimum requirements. Respirators shall be equipped... commercial designation of the respirator it contains and all appropriate approval labels....
42 CFR 84.1134 - Respirator containers; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Respirator containers; minimum requirements. 84..., Fume, and Mist; Pesticide; Paint Spray; Powered Air-Purifying High Efficiency Respirators and Combination Gas Masks § 84.1134 Respirator containers; minimum requirements. (a) Except as provided...
42 CFR 84.134 - Respirator containers; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Respirator containers; minimum requirements. 84.134... Respirators § 84.134 Respirator containers; minimum requirements. Supplied-air respirators shall be equipped... commercial designation of the respirator it contains, and all appropriate approval labels....
42 CFR 84.174 - Respirator containers; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Respirator containers; minimum requirements. 84.174... Air-Purifying Particulate Respirators § 84.174 Respirator containers; minimum requirements. (a) Except as provided in paragraph (b) of this section each respirator shall be equipped with a...
30 CFR 56.19021 - Minimum rope strength.
2010-07-01
... MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Personnel Hoisting... published catalog strength) of wire ropes used for hoisting shall meet the minimum rope strength values...=Static Load×4.0 (b) Friction drum ropes. For rope lengths less than 4,000 feet: Minimum Value=Static Load...
Theoretical minimum energies to produce steel for selected conditions
Energy Technology Data Exchange (ETDEWEB)
Fruehan, R. J. [Carnegie Mellon Univ., Pittsburgh, PA (United States); Fortini, O. [Carnegie Mellon Univ., Pittsburgh, PA (United States); Paxton, H. W. [Carnegie Mellon Univ., Pittsburgh, PA (United States); Brindle, R. [Carnegie Mellon Univ., Pittsburgh, PA (United States)
2000-03-01
An ITP study has determined the theoretical minimum energy requirements for producing steel from ore, scrap, and direct reduced iron. Dr. Richard Fruehan's report, Theoretical Minimum Energies to Produce Steel for Selected Conditions, provides insight into the potential energy savings (and associated reductions in carbon dioxide emissions) for ironmaking, steelmaking, and rolling processes (PDF 459 KB).
47 CFR 22.951 - Minimum coverage requirement.
2010-10-01
... MOBILE SERVICES Cellular Radiotelephone Service § 22.951 Minimum coverage requirement. Applications for... toward the minimum coverage requirement. Applications for authority to operate a new cellular system in... reefs only), except for unserved areas in the Gulf of Mexico MSA....
The impact of minimum wages on youth employment in Portugal
S.C. Pereira
2003-01-01
textabstractFrom January 1, 1987, the legal minimum wage for workers aged 18 and 19 in Portugal was uprated to the full adult rate, generating a 49.3% increase between 1986 and 1987 in the legal minimum wage for this age group. This shock is used as a ?natural experiment? to evaluate the impact of t
12 CFR 932.8 - Minimum liquidity requirements.
2010-01-01
... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Minimum liquidity requirements. 932.8 Section... CAPITAL STANDARDS FEDERAL HOME LOAN BANK CAPITAL REQUIREMENTS § 932.8 Minimum liquidity requirements. In addition to meeting the deposit liquidity requirements contained in § 965.3 of this chapter, each...
The Minimum Wage, Restaurant Prices, and Labor Market Structure
Aaronson, Daniel; French, Eric; MacDonald, James
2008-01-01
Using store-level and aggregated Consumer Price Index data, we show that restaurant prices rise in response to minimum wage increases under several sources of identifying variation. We introduce a general model of employment determination that implies minimum wage hikes cause prices to rise in competitive labor markets but potentially fall in…
The Effect of Minimum Wage Rates on High School Completion
Warren, John Robert; Hamrock, Caitlin
2010-01-01
Does increasing the minimum wage reduce the high school completion rate? Previous research has suffered from (1. narrow time horizons, (2. potentially inadequate measures of states' high school completion rates, and (3. potentially inadequate measures of minimum wage rates. Overcoming each of these limitations, we analyze the impact of changes in…
The Minimum Wage and the Employment of Teenagers. Recent Research.
Fallick, Bruce; Currie, Janet
A study used individual-level data from the National Longitudinal Study of Youth to examine the effects of changes in the federal minimum wage on teenage employment. Individuals in the sample were classified as either likely or unlikely to be affected by these increases in the federal minimum wage on the basis of their wage rates and industry of…
Is a Minimum Wage an Appropriate Instrument for Redistribution?
A.A.F. Gerritsen (Aart); B. Jacobs (Bas)
2016-01-01
textabstractWe analyze the redistributional (dis)advantages of a minimum wage over income taxation in competitive labor markets, without imposing assumptions on the (in)efficiency of labor rationing. Compared to a distributionally equivalent tax change, a minimum-wage increase raises involuntary
The impact of minimum wages on youth employment in Portugal
S.C. Pereira
2003-01-01
textabstractFrom January 1, 1987, the legal minimum wage for workers aged 18 and 19 in Portugal was uprated to the full adult rate, generating a 49.3% increase between 1986 and 1987 in the legal minimum wage for this age group. This shock is used as a ?natural experiment? to evaluate the impact of
7 CFR 1610.5 - Minimum Bank loan.
2010-01-01
... 7 Agriculture 11 2010-01-01 2010-01-01 false Minimum Bank loan. 1610.5 Section 1610.5 Agriculture Regulations of the Department of Agriculture (Continued) RURAL TELEPHONE BANK, DEPARTMENT OF AGRICULTURE LOAN POLICIES § 1610.5 Minimum Bank loan. A Bank loan will not be made unless the applicant qualifies for a...
14 CFR 23.149 - Minimum control speed.
2010-01-01
... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Minimum control speed. 23.149 Section 23... Maneuverability § 23.149 Minimum control speed. (a) VMC is the calibrated airspeed at which, when the critical... still inoperative, and thereafter maintain straight flight at the same speed with an angle of bank...
Minimum bias measurement at 13 TeV
Orlando, Nicola; The ATLAS collaboration
2017-01-01
The modelling of Minimum Bias (MB) is a crucial ingredient to learn about the description of soft QCD processes and to simulate the environment at the LHC with many concurrent pp interactions (pile-up). We summarise the ATLAS minimum bias measurements with proton-proton collision at 13 TeV center-of-mass-energy at the Large Hadron Collider.
A Broadband Beamformer Using Controllable Constraints and Minimum Variance
DEFF Research Database (Denmark)
Karimian-Azari, Sam; Benesty, Jacob; Jensen, Jesper Rindom
2014-01-01
The minimum variance distortionless response (MVDR) and the linearly constrained minimum variance (LCMV) beamformers are two optimal approaches in the sense of noise reduction. The LCMV beamformer can also reject interferers using linear constraints at the expense of reducing the degree of freedom...
Minimum fatigue pre-crack extension for fracture testing
Walters, C.L.; Voormeeren, L.O.
2013-01-01
The minimum pre-crack necessary to achieve an accurate measurement of the J-integral is examined with the use of elastic-plastic finite element analysis. This minimum pre-crack is shorter than what is specified in fracture codes ASTM E1820 and BS 7448. A variety of steel properties are considered, b
Multiple Objective Minimum Cost Flow Problems: A Review
DEFF Research Database (Denmark)
Hamacher, H.W.; Pedersen, Christian Roed; Ruzika, S.
2005-01-01
In this paper, theory and algorithms for solving the multiple objective minimum cost flow problem are reviewed. For both the continuous and integer case exact and approximation algorithms are presented. In addition, a section on compromise solutions summarizes corresponding results. The reference...... list consists of all papers known to the authors which deal with the multiple objective minimum cost flow problem....
77 FR 43196 - Minimum Internal Control Standards and Technical Standards
2012-07-24
... COMMISSION 25 CFR Parts 543 and 547 Minimum Internal Control Standards and Technical Standards AGENCY... . SUPPLEMENTARY INFORMATION: Part 543 addresses minimum internal control standards (MICS) for Class II gaming operations. The regulations require tribes to establish controls and implement procedures at least...
State Minimum Core Curricula: Arkansas Institutions of Higher Education.
Arkansas State Dept. of Higher Education, Little Rock.
State minimum core curricula for two-year and four-year colleges and universities have been approved by the Arkansas Board of Higher Education. Within the framework of the State Minimum Core, each state institution is required to propose 35 semester/credit hours from its institutional general education core to be recognized for purposes of the…
49 CFR 236.562 - Minimum rail current required.
2010-10-01
..., INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES Automatic Train Stop, Train Control and Cab Signal Systems Rules and Instructions; Locomotives § 236.562 Minimum rail current required. The minimum rail current required to restore the locomotive equipment...
14 CFR 93.307 - Minimum flight altitudes.
2010-01-01
... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Minimum flight altitudes. 93.307 Section 93...) AIR TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Grand Canyon National Park, AZ § 93.307 Minimum flight altitudes. Except in an emergency, or...
12 CFR 615.5205 - Minimum permanent capital standards.
2010-01-01
... AFFAIRS, LOAN POLICIES AND OPERATIONS, AND FUNDING OPERATIONS Capital Adequacy § 615.5205 Minimum permanent capital standards. Each institution shall at all times maintain permanent capital at a level of at... 12 Banks and Banking 6 2010-01-01 2010-01-01 false Minimum permanent capital standards....
29 CFR 541.604 - Minimum guarantee plus extras.
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Minimum guarantee plus extras. 541.604 Section 541.604 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS... SALES EMPLOYEES Salary Requirements § 541.604 Minimum guarantee plus extras. (a) An employer may...
Simple and Three-Valued Simple Minimum Coloring Games
Musegaas, Marieke; Borm, Peter; Quant, Marieke
2015-01-01
In this paper minimum coloring games are considered. We characterize the type of conflict graphs inducing simple or three-valued simple minimum coloring games. We provide an upper bound on the number of maximum cliques of conflict graphs inducing such games. Moreover, a characterization of the core
Minimum Cost Spanning Tree Games and Population Monotonic Allocation Schemes
Norde, H.W.; Moretti, S.; Tijs, S.H.
2001-01-01
In this paper we present the Subtraction Algorithm that computes for every classical minimum cost spanning tree game a population monotonic allocation scheme.As a basis for this algorithm serves a decomposition theorem that shows that every minimum cost spanning tree game can be written as nonnegati
30 CFR 77.606-1 - Rubber gloves; minimum requirements.
2010-07-01
... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Rubber gloves; minimum requirements. 77.606-1... COAL MINES Trailing Cables § 77.606-1 Rubber gloves; minimum requirements. (a) Rubber gloves (lineman's... be used and tested in accordance with the provisions of §§ 77.704-6 through 77.704-8. (b)...
47 CFR 25.205 - Minimum angle of antenna elevation.
2010-10-01
... 47 Telecommunication 2 2010-10-01 2010-10-01 false Minimum angle of antenna elevation. 25.205... SATELLITE COMMUNICATIONS Technical Standards § 25.205 Minimum angle of antenna elevation. (a) Earth station antennas shall not normally be authorized for transmission at angles less than 5° measured from the...
6 CFR 27.204 - Minimum concentration by security issue.
2010-01-01
... 6 Domestic Security 1 2010-01-01 2010-01-01 false Minimum concentration by security issue. 27.204... FACILITY ANTI-TERRORISM STANDARDS Chemical Facility Security Program § 27.204 Minimum concentration by... is present in a mixture, and the concentration of the chemical is equal to or greater than one...
42 CFR 84.79 - Breathing gas; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing gas; minimum requirements. 84.79 Section...-Contained Breathing Apparatus § 84.79 Breathing gas; minimum requirements. (a) Breathing gas used to supply... respiratory tract irritating compounds. (c) Compressed, gaseous breathing air shall meet the...
42 CFR 84.122 - Breathing resistance test; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing resistance test; minimum requirements. 84... Masks § 84.122 Breathing resistance test; minimum requirements. (a) Resistance to airflow will be measured in the facepiece or mouthpiece of a gas mask mounted on a breathing machine both before and...
42 CFR 84.115 - Breathing tubes; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing tubes; minimum requirements. 84.115 Section 84.115 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL... § 84.115 Breathing tubes; minimum requirements. Flexible breathing tubes used in conjunction with...
42 CFR 84.72 - Breathing tubes; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing tubes; minimum requirements. 84.72...-Contained Breathing Apparatus § 84.72 Breathing tubes; minimum requirements. Flexible breathing tubes used in conjunction with breathing apparatus shall be designed and constructed to prevent: (a)...
42 CFR 84.203 - Breathing resistance test; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing resistance test; minimum requirements. 84.203 Section 84.203 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES... Chemical Cartridge Respirators § 84.203 Breathing resistance test; minimum requirements. (a) Resistance...
42 CFR 84.85 - Breathing bags; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing bags; minimum requirements. 84.85 Section...-Contained Breathing Apparatus § 84.85 Breathing bags; minimum requirements. (a) Breathing bags shall have.... (b) Breathing bags shall be constructed of materials which are flexible and resistant to...
42 CFR 84.172 - Breathing tubes; minimum requirements.
2010-10-01
... 42 Public Health 1 2010-10-01 2010-10-01 false Breathing tubes; minimum requirements. 84.172... Air-Purifying Particulate Respirators § 84.172 Breathing tubes; minimum requirements. Flexible breathing tubes used in conjunction with respirators shall be designed and constructed to prevent:...
27 CFR 40.526 - Minimum manufacturing and activity requirements.
2010-04-01
... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Minimum manufacturing and activity requirements. 40.526 Section 40.526 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX... Manufacturers of Processed Tobacco § 40.526 Minimum manufacturing and activity requirements. A permit...
28 CFR 2.76 - Reduction in minimum sentence.
2010-07-01
... OF PRISONERS, YOUTH OFFENDERS, AND JUVENILE DELINQUENTS District of Columbia Code: Prisoners and... minimum term of his or her sentence may request the Commission to file an application with the sentencing... application to the sentencing court for a reduction of a prisoner's minimum term if the Commission finds...
Minimum Competencies in Undergraduate Motor Development. Guidance Document
National Association for Sport and Physical Education, 2004
2004-01-01
The minimum competency guidelines in Motor Development described herein at the undergraduate level may be gained in one or more motor development course(s) or through other courses provided in an undergraduate curriculum. The minimum guidelines include: (1) Formulation of a developmental perspective; (2) Knowledge of changes in motor behavior…
14 CFR 135.93 - Autopilot: Minimum altitudes for use.
2010-01-01
... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Autopilot: Minimum altitudes for use. 135... Operations § 135.93 Autopilot: Minimum altitudes for use. (a) Except as provided in paragraphs (b), (c), (d), and (e) of this section, no person may use an autopilot at an altitude above the terrain which is...
Estimation of minimum surface temperature at stage ll (Short Communication
Directory of Open Access Journals (Sweden)
A. P. Dimri
2001-04-01
Full Text Available Forecasting minimum surface temperature at a station, Stage II, located in mountainous region requires information on the meteorological fields. An attempt has been made to develop a statistical model for forecasting minimum temperature at ground level using previous years' data. Surface data were collected at StageII (longitude 73 oB, latitude 34 oN, and altitude 2650 m. Atmospheric variables are influenced by complex orography and surface features to a great extent. In the present study, statistical relationship between atmosphere parameters and minimum temperature at the site has been established. Multivariate linear regression analysis has been used to establish the relationship to predict the minimum surface temperature for the following day. A comparison between the observed and the calculated forecast minimum temperature has been made. Most of the cases are well predicted (multiple correlation coefficient of 0.94.
The impact of minimum wage adjustments on Vietnamese wage inequality
DEFF Research Database (Denmark)
Hansen, Henrik; Rand, John; Torm, Nina
Using Vietnamese Labour Force Survey data we analyse the impact of minimum wage changes on wage inequality. Minimum wages serve to reduce local wage inequality in the formal sectors by decreasing the gap between the median wages and the lower tail of the local wage distributions. In contrast, local...... wage inequality is increased in the informal sectors. Overall, the minimum wages decrease national wage inequality. Our estimates indicate a decrease in the wage distribution Gini coefficient of about 2 percentage points and an increase in the 10/50 wage ratio of 5-7 percentage points caused...... by the adjustment of the minimum wages from 2011to 2012 that levelled the minimum wage across economic sectors....
NP-Completeness Results for Minimum Planar Spanners
Directory of Open Access Journals (Sweden)
Ulrik Brandes
1998-12-01
Full Text Available For any fixed parameter t greater or equal to 1, a t-spanner of a graph G is a spanning subgraph in which the distance between every pair of vertices is at most t times their distance in G. A minimum t-spanner is a t-spanner with minimum total edge weight or, in unweighted graphs, minimum number of edges. In this paper, we prove the NP-hardness of finding minimum t-spanners for planar weighted graphs and digraphs if t greater or equal to 3, and for planar unweighted graphs and digraphs if t greater or equal to 5. We thus extend results on that problem to the interesting case where the instances are known to be planar. We also introduce the related problem of finding minimum planar t-spanners and establish its NP-hardness for similar fixed values of t.
AN ANT COLONY ALGORITHM FOR MINIMUM UNSATISFIABLE CORE EXTRACTION
Institute of Scientific and Technical Information of China (English)
Zhang Jianmin; Shen Shengyu; Li Sikun
2008-01-01
Explaining the causes of infeasibility of Boolean formulas has many practical applications in electronic design automation and formal verification of hardware. Furthermore,a minimum explanation of infeasibility that excludes all irrelevant information is generally of interest. A smallest-cardinality unsatisfiable subset called a minimum unsatisfiable core can provide a succinct explanation of infea-sibility and is valuable for applications. However,little attention has been concentrated on extraction of minimum unsatisfiable core. In this paper,the relationship between maximal satisfiability and mini-mum unsatisfiability is presented and proved,then an efficient ant colony algorithm is proposed to derive an exact or ncarly exact minimum unsatisfiable core based on the relationship. Finally,ex-perimental results on practical benchmarks compared with the best known approach are reported,and the results show that the ant colony algorithm strongly outperforms the best previous algorithm.
Minimum Variance Portfolios in the Brazilian Equity Market
Directory of Open Access Journals (Sweden)
Alexandre Rubesam
2013-03-01
Full Text Available We investigate minimum variance portfolios in the Brazilian equity market using different methods to estimate the covariance matrix, from the simple model of using the sample covariance to multivariate GARCH models. We compare the performance of the minimum variance portfolios to those of the following benchmarks: (i the IBOVESPA equity index, (ii an equally-weighted portfolio, (iii the maximum Sharpe ratio portfolio and (iv the maximum growth portfolio. Our results show that the minimum variance portfolio has higher returns with lower risk compared to the benchmarks. We also consider long-short 130/30 minimum variance portfolios and obtain similar results. The minimum variance portfolio invests in relatively few stocks with low βs measured with respect to the IBOVESPA index, being easily replicable by individual and institutional investors alike.
Effects of protocol design on lactate minimum power.
Johnson, M A; Sharpe, G R
2011-03-01
The aim of this investigation was to use a validated lactate minimum test protocol and evaluate whether blood lactate responses and the lactate minimum power are influenced by the starting power (study 1) and 1 min inter-stage rest intervals (study 2) during the incremental phase. Study 1: 8 subjects performed a lactate minimum test comprising a lactate elevation phase, recovery phase, and incremental phase comprising 5 continuous 4 min stages with starting power being 40% or 45% of the maximum power achieved during the lactate elevation phase, and with power increments of 5% maximum power. Study 2: 8 subjects performed 2 identical lactate minimum tests except that during one of the tests the incremental phase included 1 min inter-stage rest intervals. The lactate minimum power was lower when the incremental phase commenced at 40% (175±29 W) compared to 45% (184±30 W) maximum power (pvalidity and therefore training status evaluation and exercise prescription.
Fuzzy α-minimum spanning tree problem: definition and solutions
Zhou, Jian; Chen, Lu; Wang, Ke; Yang, Fan
2016-04-01
In this paper, the minimum spanning tree problem is investigated on the graph with fuzzy edge weights. The notion of fuzzy ? -minimum spanning tree is presented based on the credibility measure, and then the solutions of the fuzzy ? -minimum spanning tree problem are discussed under different assumptions. First, we respectively, assume that all the edge weights are triangular fuzzy numbers and trapezoidal fuzzy numbers and prove that the fuzzy ? -minimum spanning tree problem can be transformed to a classical problem on a crisp graph in these two cases, which can be solved by classical algorithms such as the Kruskal algorithm and the Prim algorithm in polynomial time. Subsequently, as for the case that the edge weights are general fuzzy numbers, a fuzzy simulation-based genetic algorithm using Prüfer number representation is designed for solving the fuzzy ? -minimum spanning tree problem. Some numerical examples are also provided for illustrating the effectiveness of the proposed solutions.
Teaching the Minimum Wage in Econ 101 in Light of the New Economics of the Minimum Wage.
Krueger, Alan B.
2001-01-01
Argues that the recent controversy over the effect of the minimum wage on employment offers an opportunity for teaching introductory economics. Examines eight textbooks to determine topic coverage but finds little consensus. Describes how minimum wage effects should be taught. (RLH)
Bijl, Piet; Valeton, J. Mathieu
1998-07-01
The characterization of electro-optical system performance by means of the minimum resolvable temperature difference (MRTD) or the minimum resolvable contrast (MRC) has at least three serious disadvantages: (1) the bar pattern stimulus is theoretically and practically unsuitable for 1D or 2D spatially sampled systems such as pixel-array cameras, (2) spatial phase is not taken into account, and (3) the results depend on the observer's subjective decision criterion. We propose an adequate and easily applicable alternative: the triangle orientation discrimination (TOD) threshold. The TOD is based on an improved test pattern, a better defined observer task, and a solid psychophysical measurement procedure. The method has a large number of theoretical and practical advantages: it is suitable for pixel-array cameras, scanning systems and other electro-optical and optical imaging system sin both the thermal and visual domains, it has a close relationship to real target acquisition, and the observer task is easy. The results are free from observer bias and allow statistical significance tests. The method lends itself very well to automatic measurements, and can be extended for future sensor systems that include advanced image processing. The TOD curve can be implemented easily in a target acquisition (TA) model such as ACQUIRE. An observer performance study with real targets shows that the TOD curve better predicts TA performance than the mRC does. The method has been implemented successfully in a thermal imager field test apparatus called the thermal imager performance indicator and may be implemented in current MRTD test equipment with little effort.
Minimum wall pressure coefficient of orifice plate energy dissipater
Institute of Scientific and Technical Information of China (English)
Wan-zheng Ai; Jia-hong Wang
2015-01-01
Orifice plate energy dissipaters have been successfully used in large-scale hydropower projects due to their simple structure, convenient construction procedure, and high energy dissipation ratio. The minimum wall pressure coefficient of an orifice plate can indirectly reflect its cavitation characteristics:the lower the minimum wall pressure coefficient is, the better the ability of the orifice plate to resist cavitation damage is. Thus, it is important to study the minimum wall pressure coefficient of the orifice plate. In this study, this coefficient and related parameters, such as the contraction ratio, defined as the ratio of the orifice plate diameter to the flood-discharging tunnel diameter;the relative thickness, defined as the ratio of the orifice plate thickness to the tunnel diameter;and the Reynolds number of the flow through the orifice plate, were theoretically analyzed, and their relationships were obtained through physical model experiments. It can be concluded that the minimum wall pressure coefficient is mainly dominated by the contraction ratio and relative thickness. The lower the contraction ratio and relative thickness are, the larger the minimum wall pressure coefficient is. The effects of the Reynolds number on the minimum wall pressure coefficient can be neglected when it is larger than 105. An empirical expression was presented to calculate the minimum wall pressure coefficient in this study.
Minimum wall pressure coefficient of orifice plate energy dissipater
Directory of Open Access Journals (Sweden)
Wan-zheng AI
2015-01-01
Full Text Available Orifice plate energy dissipaters have been successfully used in large-scale hydropower projects due to their simple structure, convenient construction procedure, and high energy dissipation ratio. The minimum wall pressure coefficient of an orifice plate can indirectly reflect its cavitation characteristics: the lower the minimum wall pressure coefficient is, the better the ability of the orifice plate to resist cavitation damage is. Thus, it is important to study the minimum wall pressure coefficient of the orifice plate. In this study, this coefficient and related parameters, such as the contraction ratio, defined as the ratio of the orifice plate diameter to the flood-discharging tunnel diameter; the relative thickness, defined as the ratio of the orifice plate thickness to the tunnel diameter; and the Reynolds number of the flow through the orifice plate, were theoretically analyzed, and their relationships were obtained through physical model experiments. It can be concluded that the minimum wall pressure coefficient is mainly dominated by the contraction ratio and relative thickness. The lower the contraction ratio and relative thickness are, the larger the minimum wall pressure coefficient is. The effects of the Reynolds number on the minimum wall pressure coefficient can be neglected when it is larger than 105. An empirical expression was presented to calculate the minimum wall pressure coefficient in this study.
Setting a minimum age for juvenile justice jurisdiction in California.
S Barnert, Elizabeth; S Abrams, Laura; Maxson, Cheryl; Gase, Lauren; Soung, Patricia; Carroll, Paul; Bath, Eraka
2017-03-13
Purpose Despite the existence of minimum age laws for juvenile justice jurisdiction in 18 US states, California has no explicit law that protects children (i.e. youth less than 12 years old) from being processed in the juvenile justice system. In the absence of a minimum age law, California lags behind other states and international practice and standards. The paper aims to discuss these issues. Design/methodology/approach In this policy brief, academics across the University of California campuses examine current evidence, theory, and policy related to the minimum age of juvenile justice jurisdiction. Findings Existing evidence suggests that children lack the cognitive maturity to comprehend or benefit from formal juvenile justice processing, and diverting children from the system altogether is likely to be more beneficial for the child and for public safety. Research limitations/implications Based on current evidence and theory, the authors argue that minimum age legislation that protects children from contact with the juvenile justice system and treats them as children in need of services and support, rather than as delinquents or criminals, is an important policy goal for California and for other national and international jurisdictions lacking a minimum age law. Originality/value California has no law specifying a minimum age for juvenile justice jurisdiction, meaning that young children of any age can be processed in the juvenile justice system. This policy brief provides a rationale for a minimum age law in California and other states and jurisdictions without one.
Design of a minimum emittance nBA lattice
Lee, S. Y.
1998-04-01
An attempt to design a minimum emittance n-bend achromat (nBA) lattice has been made. One distinct feature is that dipoles with two different lengths were used. As a multiple bend achromat, five bend achromat lattices with six superperiod were designed. The obtained emittace is three times larger than the theoretical minimum. Tunes were chosen to avoid third order resonances. In order to correct first and second order chromaticities, eight family sextupoles were placed. The obtained emittance of five bend achromat lattices is almost equal to the minimum emittance of five bend achromat lattice consisting of dipoles with equal length.
Minimum airflow reset of single-duct VAV terminal boxes
Cho, Young-Hum
Single duct Variable Air Volume (VAV) systems are currently the most widely used type of HVAC system in the United States. When installing such a system, it is critical to determine the minimum airflow set point of the terminal box, as an optimally selected set point will improve the level of thermal comfort and indoor air quality (IAQ) while at the same time lower overall energy costs. In principle, this minimum rate should be calculated according to the minimum ventilation requirement based on ASHRAE standard 62.1 and maximum heating load of the zone. Several factors must be carefully considered when calculating this minimum rate. Terminal boxes with conventional control sequences may result in occupant discomfort and energy waste. If the minimum rate of airflow is set too high, the AHUs will consume excess fan power, and the terminal boxes may cause significant simultaneous room heating and cooling. At the same time, a rate that is too low will result in poor air circulation and indoor air quality in the air-conditioned space. Currently, many scholars are investigating how to change the algorithm of the advanced VAV terminal box controller without retrofitting. Some of these controllers have been found to effectively improve thermal comfort, indoor air quality, and energy efficiency. However, minimum airflow set points have not yet been identified, nor has controller performance been verified in confirmed studies. In this study, control algorithms were developed that automatically identify and reset terminal box minimum airflow set points, thereby improving indoor air quality and thermal comfort levels, and reducing the overall rate of energy consumption. A theoretical analysis of the optimal minimum airflow and discharge air temperature was performed to identify the potential energy benefits of resetting the terminal box minimum airflow set points. Applicable control algorithms for calculating the ideal values for the minimum airflow reset were developed and
Minimum Information about a Cardiac Electrophysiology Experiment (MICEE)
DEFF Research Database (Denmark)
Quinn, T A; Granite, S; Allessie, M A;
2011-01-01
Cardiac experimental electrophysiology is in need of a well-defined Minimum Information Standard for recording, annotating, and reporting experimental data. As a step towards establishing this, we present a draft standard, called Minimum Information about a Cardiac Electrophysiology Experiment....... It is hoped that this will enhance the integration of individual results into experimental, computational, and conceptual models. In its present form, this draft is intended for assessment and development by the research community. We invite the reader to join this effort, and, if deemed productive, implement...... the Minimum Information about a Cardiac Electrophysiology Experiment standard in their own work....
On minimum sum representations for weighted voting games
Kurz, Sascha
2011-01-01
A proposal in a weighted voting game is accepted if the sum of the (non-negative) weights of the "yea" voters is at least as large as a given quota. Several authors have considered representations of weighted voting games with minimum sum, where the weights and the quota are restricted to be integers. Freixas and Molinero have classified all weighted voting games without a unique minimum sum representation for up to 8 voters. Here we exhaustively classify all weighted voting games consisting of 9 voters which do not admit a unique minimum sum integer weight representation.
Minimum Information Dominating Set for Critical Sampling over Graphs
2015-04-01
information on IDS uniquely determines the information in the rest of the graph. The minimum vertex cover ( MVC ) [10, 11] and the mini- mum dominating set (MDS...12, 13] are related to the IDS problem. The MVC asks for a minimum subset of vertices such that each edge in the original graph is adjacent to at...vertex in this subset. The minimum IDS problem is inherently more complex than MVC and MDS. For instance, as shown in this paper, it is co-NP-complete to
Reactive Power Compensation Method Considering Minimum Effective Reactive Power Reserve
Gong, Yiyu; Zhang, Kai; Pu, Zhang; Li, Xuenan; Zuo, Xianghong; Zhen, Jiao; Sudan, Teng
2017-05-01
According to the calculation model of minimum generator reactive power reserve of power system voltage stability under the premise of the guarantee, the reactive power management system with reactive power compensation combined generator, the formation of a multi-objective optimization problem, propose a reactive power reserve is considered the minimum generator reactive power compensation optimization method. This method through the improvement of the objective function and constraint conditions, when the system load growth, relying solely on reactive power generation system can not meet the requirement of safe operation, increase the reactive power reserve to solve the problem of minimum generator reactive power compensation in the case of load node.
Minimum length scale in topology optimization by geometric constraints
DEFF Research Database (Denmark)
Zhou, Mingdong; Lazarov, Boyan Stefanov; Wang, Fengwen
2015-01-01
A density-based topology optimization approach is proposed to design structures with strict minimum length scale. The idea is based on using a filtering-threshold topology optimization scheme and computationally cheap geometric constraints. The constraints are defined over the underlying structural...... geometry represented by the filtered and physical fields. Satisfying the constraints leads to a design that possesses user-specified minimum length scale. Conventional topology optimization problems can be augmented with the proposed constraints to achieve minimum length scale on the final design....... No additional finite element analysis is required for the constrained optimization. Several benchmark examples are presented to show the effectiveness of this approach....
Prasitmeeboon, Pitcha
repetitive control FIR compensator. The aim is to reduce the final error level by using real time frequency response model updates to successively increase the cutoff frequency, each time creating the improved model needed to produce convergence zero error up to the higher cutoff. Non-minimum phase systems present a difficult design challenge to the sister field of Iterative Learning Control. The third topic investigates to what extent the same challenges appear in RC. One challenge is that the intrinsic non-minimum phase zero mapped from continuous time is close to the pole of repetitive controller at +1 creating behavior similar to pole-zero cancellation. The near pole-zero cancellation causes slow learning at DC and low frequencies. The Min-Max cost function over the learning rate is presented. The Min-Max can be reformulated as a Quadratically Constrained Linear Programming problem. This approach is shown to be an RC design approach that addresses the main challenge of non-minimum phase systems to have a reasonable learning rate at DC. Although it was illustrated that using the Min-Max objective improves learning at DC and low frequencies compared to other designs, the method requires model accuracy at high frequencies. In the real world, models usually have error at high frequencies. The fourth topic addresses how one can merge the quadratic penalty to the Min-Max cost function to increase robustness at high frequencies. The topic also considers limiting the Min-Max optimization to some frequencies interval and applying an FIR zero-phase low-pass filter to cutoff the learning for frequencies above that interval.
Hudson, Parisa; Hudson, Stephen D; Handler, William B; Scholl, Timothy J; Chronik, Blaine A
2010-04-01
High-performance shim coils are required for high-field magnetic resonance imaging and spectroscopy. Complete sets of high-power and high-performance shim coils were designed using two different methods: the minimum inductance and the minimum power target field methods. A quantitative comparison of shim performance in terms of merit of inductance (ML) and merit of resistance (MR) was made for shim coils designed using the minimum inductance and the minimum power design algorithms. In each design case, the difference in ML and the difference in MR given by the two design methods was inductance designs tend to feature oscillations within the current density; while minimum power designs tend to feature less rapidly varying current densities and lower power dissipation. Overall, the differences in coil performance obtained by the two methods are relatively small. For the specific case of shim systems customized for small animal imaging, the reduced power dissipation obtained when using the minimum power method is judged to be more significant than the improvements in switching speed obtained from the minimum inductance method.
minimum variance estimation of yield parameters of rubber tree with ...
African Journals Online (AJOL)
2013-03-01
Mar 1, 2013 ... STAMP, an OxMetric modular software system for time series analysis, was used to estimate the yield ... derlying regression techniques. .... Kalman Filter Minimum Variance Estimation of Rubber Tree Yield Parameters. 83.
and minimum plastic zone radius (MPZR) for four point bend ...
African Journals Online (AJOL)
user
LEFM) approach. ... where the radius of plastic zone takes either a local or global minimum depending on the ..... facilities provided by the Research Centre, B V B College of Engineering & ... American institute of physics conference proceedings.
42 CFR 84.195 - Breathing tubes; minimum requirements.
2010-10-01
... Cartridge Respirators § 84.195 Breathing tubes; minimum requirements. Flexible breathing tubes used in conjunction with respirators shall be designed and constructed to prevent: (a) Restriction of free...
42 CFR 84.132 - Breathing tubes; minimum requirements.
2010-10-01
... Respirators § 84.132 Breathing tubes; minimum requirements. Flexible breathing tubes used in conjunction with supplied-air respirators shall be designed and constructed to prevent: (a) Restriction of free...
42 CFR 84.141 - Breathing gas; minimum requirements.
2010-10-01
... Respirators § 84.141 Breathing gas; minimum requirements. (a) Breathing gas used to supply supplied-air respirators shall be respirable breathing air and contain no less than 19.5 volume-percent of oxygen....
Minimum Population Search, an Application to Molecular Docking
Directory of Open Access Journals (Sweden)
Antonio Bolufé-Röhler
2014-08-01
Full Text Available Computer modeling of protein-ligand interactions is one of the most important phases in a drug design process. Part of the process involves the optimization of highly multi-modal objective (scoring functions. This research presents the Minimum Population Search heuristic as an alternative for solving these global unconstrained optimization problems. To determine the effectiveness of Minimum Population Search, a comparison with seven state-of-the-art search heuristics is performed. Being specifically designed for the optimization of large scale multi-modal problems, Minimum Population Search achieves excellent results on all of the tested complexes, especially when the amount of available function evaluations is strongly reduced. A first step is also made toward the design of hybrid algorithms based on the exploratory power of Minimum Population Search. Computational results show that hybridization leads to a further improvement in performance.
The density minimum at the Earth's magnetic equator
1992-01-01
Journal of Geophysical Research,Volume 97, pp. 1135-1150 Observations of the density structure in the plasmapause region reveal the existence of a local minimum in the total electron density at the magnetic equator.
Parameterization of ion channeling half-angles and minimum yields
Energy Technology Data Exchange (ETDEWEB)
Doyle, Barney L.
2016-03-15
A MS Excel program has been written that calculates ion channeling half-angles and minimum yields in cubic bcc, fcc and diamond lattice crystals. All of the tables and graphs in the three Ion Beam Analysis Handbooks that previously had to be manually looked up and read from were programed into Excel in handy lookup tables, or parameterized, for the case of the graphs, using rather simple exponential functions with different power functions of the arguments. The program then offers an extremely convenient way to calculate axial and planar half-angles, minimum yields, effects on half-angles and minimum yields of amorphous overlayers. The program can calculate these half-angles and minimum yields for 〈u v w〉 axes and [h k l] planes up to (5 5 5). The program is open source and available at (http://www.sandia.gov/pcnsc/departments/iba/ibatable.html).
Procedures for Identifying and Selecting a Minimum Competency Test.
Wildemuth, Barbara
1979-01-01
Describes the steps that a school district should follow in the first stages of implementing a minimum competency testing program: preparatory activities, defining the project, identifying existing tests, evaluating tests, developing a local test, and sharing knowledge. (Author)
Resident Assessment Instrument/Minimum Data Set (RAI/MDS)
Department of Veterans Affairs — The Resident Assessment Instrument/Minimum Data Set (RAI/MDS) is a comprehensive assessment and care planning process used by the nursing home industry since 1990 as...
The balanced minimum evolution problem under uncertain data
Catanzaro, Daniele; Labbe, Martine; Pesenti, Raffaele
2013-01-01
We investigate the Robust Deviation Balanced Minimum Evolution Problem (RDBMEP), a combinatorial optimization problem that arises in computational biology when the evolutionary distances from taxa are uncertain and varying inside intervals. By exploiting some fundamental properties of the objective
Minimum uncertainty and squeezing in diffusion processes and stochastic quantization
Demartino, S.; Desiena, S.; Illuminati, Fabrizo; Vitiello, Giuseppe
1994-01-01
We show that uncertainty relations, as well as minimum uncertainty coherent and squeezed states, are structural properties for diffusion processes. Through Nelson stochastic quantization we derive the stochastic image of the quantum mechanical coherent and squeezed states.
experimental investigation of sand minimum transport velocity in ...
African Journals Online (AJOL)
user
minimum transport velocity models in pipelines, the analytical and empirical methods. Because of the ... identified two niche areas of research such as sand transport in .... operational conditions the limit deposit velocity passes through a ...
USING GENETIC ALGORTIHM TO SOLVE STEINER MINIMUM SPANNING TREE PROBLEM
Directory of Open Access Journals (Sweden)
Öznur İŞÇİ
2006-03-01
Full Text Available Genetic algorithms (GA are a stochastic research methods, and they produce solutions that are close to optimum or near optimum. In addition to GA's successful application to traveling salesman problem, square designation, allocation, workshop table, preparation of lesson/examination schedules, planning of communication networks, assembling line balanced, minimum spanning tree type many combinatorial optimization problems it would be applicable to make the best comparison in optimization. In this study a Java program is developed to solve Steiner minimum spanning tree problem by genetic algorithm and its performance is examined. According to the tests carried out on the problems that were given before in the literature, results that are close to optimum are obtained in by GA approach that is recommended in this study. For the predetermined points in the study, length and gain are calculated for Steiner minimum spanning tree problem and minimum spanning tree problem.
Challenging Minimum Deterrence: Articulating the Contemporary Relevance of Nuclear Weapons
2016-07-13
actually mean to interstate relations .4 Here, the arguments of modern advocates for minimum deterrence come into play. In a 2010 article advocating...recapitalization expenditures over the next couple of decades. This emphasis on the ICBM and SLBM legs as a constant existential deterrent does not mean ...elements of the US nuclear force gives this debate added meaning and urgency. One alternative currently under discus- sion is minimum deterrence. This
Informality and minimum wages by cohort in Colombia
Directory of Open Access Journals (Sweden)
Jhon James Mora
2014-12-01
Full Text Available This article aims to analyze the effect of minimum wage levels on the decision to join the informal job sector. We estimated a pseudo panel model of engagement in the informal sector using an IV-probit. Our results show that an increased wage gap-the relative difference between observed and minimum wage-has not only a disincentive effect on the probability of joining informality, but also leads to a substitution effect between younger and older cohorts.
Decoding Reed-Solomon Codes beyond half the minimum distance
DEFF Research Database (Denmark)
Høholdt, Tom; Nielsen, Rasmus Refslund
1999-01-01
We describe an efficient implementation of M.Sudan"s algorithm for decoding Reed-Solomon codes beyond half the minimum distance. Furthermore we calculate an upper bound of the probabilty of getting more than one codeword as output......We describe an efficient implementation of M.Sudan"s algorithm for decoding Reed-Solomon codes beyond half the minimum distance. Furthermore we calculate an upper bound of the probabilty of getting more than one codeword as output...
SOLVING MINIMUM SPANNING TREE PROBLEM WITH DNA COMPUTING
Institute of Scientific and Technical Information of China (English)
Liu Xikui; Li Yan; Xu Jin
2005-01-01
Molecular programming is applied to minimum spanning problem whose solution requires encoding of real values in DNA strands. A new encoding scheme is proposed for real values that is biologically plausible and has a fixed code length. According to the characteristics of the problem, a DNA algorithm solving the minimum spanning tree problem is given. The effectiveness of the proposed method is verified by simulation. The advantages and disadvantages of this algorithm are discussed.
A Minimum Spanning Tree Representation of Anime Similarities
Wibowo, Canggih Puspo
2016-01-01
In this work, a new way to represent Japanese animation (anime) is presented. We applied a minimum spanning tree to show the relation between anime. The distance between anime is calculated through three similarity measurements, namely crew, score histogram, and topic similarities. Finally the centralities are also computed to reveal the most significance anime. The result shows that the minimum spanning tree can be used to determine the similarity anime. Furthermore, by using centralities ca...
Minimum emittance of isochronus rings for synchrotron light source
Shoji, Y
1999-01-01
Theoretically achievable minimum emittances of isochronus rings for synchrotron light source are calculated. The rings discussed in this paper consist of isochronus and achromatic bending cells, isochronus TBA (triple bend achromat) cells with negative dispersion, isochronus TBA cells with inverse bends or isochronus QBA (four bend achromat) cells. We show that the minimum emittances of these rings are roughly 2 or 3 times of those of the optimized non-isochronus rings.
Minimum cost network flows: Problems, algorithms, and software
Directory of Open Access Journals (Sweden)
Sifaleras Angelo
2013-01-01
Full Text Available We present a wide range of problems concerning minimum cost network flows, and give an overview of the classic linear single-commodity Minimum Cost Network Flow Problem (MCNFP and some other closely related problems, either tractable or intractable. We also discuss state-of-the-art algorithmic approaches and recent advances in the solution methods for the MCNFP. Finally, optimization software packages for the MCNFP are presented.
Minimum entropy production of neutrino radiation in the steady state
Energy Technology Data Exchange (ETDEWEB)
Essex, C.; Kennedy, D.C.
1997-08-01
A thermodynamical minimum principle valid for photon radiation is shown to hold for arbitrary geometries. It is successfully extended to neutrinos, in the zero mass and chemical potential case, following a parallel development of photon and neutrino statistics. This minimum principle stems more from that of Planck than that of classical Onsager-Prigogine irreversible thermodynamics. Its extension from bosons to fermions suggests that it may have a still wider validity. 14 refs.
Minimum Orders of Eulerian Oriented Digraphs with Given Diameter
Institute of Scientific and Technical Information of China (English)
Yoomi RHO; Byeong Moon KIM; Woonjae HWANG; Byung Chul SONG
2014-01-01
A digraph D is oriented if it does not contain 2-cycles. If an oriented digraph D has a directed eulerian path, it is an oriented eulerian digraph. In this paper, when an oriented eulerian digraph D has minimum out-degree 2 and a diameter d, we find the minimum order of D. In addition, when D is 2-regular with diameter 4m (m≥2), we classify the extremal cases.
Minimum water requirement for social and economic development
Chenoweth, JL
2008-01-01
There is no common understanding of the minimum per capita fresh water requirement for human health and economic and social development. Existing estimates vary between 20 litres and 4,654 litres per capita per day, however, these estimates are methodologically problematic as they consider only human consumptive and hygiene needs, or they consider economic needs but not the effects of trade. Reconsidering the components of a minimum water requirement estimate for human health and for economic...
Distributed consensus on minimum time rendezvous via cyclic alternating projection
Hu, Chunhe; Chen, Zongji
2014-01-01
In this paper, we propose a distributed algorithm to solve planar minimum time multi-vehicle rendezvous problem with non-identical velocity constraints on cyclic digraph (topology). Motivated by the cyclic alternating projection method that can compute a point's projection on the intersection of some convex sets, we transform the minimum time rendezvous problem into finding the distance between the position plane and the intersection of several second-order cones in position-time space. The d...
Design of RTDA controller for industrial process using SOPDT model with minimum or non-minimum zero.
Anbarasan, K; Srinivasan, K
2015-07-01
This research paper focuses on the design and development of simplified RTDA control law computation formulae for SOPDT process with minimum or non-minimum zero. The design of RTDA control scheme consists of three main components namely process output prediction, model prediction update and control action computation. The systematic approach for computation of the above three components for SOPDT process with minimum or non-minimum zero is developed in this paper. The design, implementation and performance evaluation of the developed controller is demonstrated via simulation examples. The closed loop equation, block diagram representation and theoretical stability derivation for RTDA controller are developed. The performance of proposed controller is compared with IMC, SPC, MPC and PID controller and it is demonstrated on Industrial non-linear CSTR process.
An improved approximation ratio for the minimum latency problem
Energy Technology Data Exchange (ETDEWEB)
Goemans, M.; Kleinberg, J. [MIT, Cambridge, MA (United States)
1996-12-31
Given a tour visiting n points in a metric space, the latency of one of these points p is the distance traveled in the tour before reaching p. The minimum latency problem asks for a tour passing through n given points for which the total latency of the n points is minimum; in effect, we are seeking the tour with minimum average {open_quotes}arrival time.{close_quotes} This problem has been studied in the operations research literature, where it has also been termed the {open_quotes}delivery-man problem{close_quotes} and the {open_quotes}traveling repairman problem.{close_quotes} The approximability of the minimum latency problem was first considered by Sahni and Gonzalez in 1976; however, unlike the classical traveling salesman problem, it is not easy to give any constant-factor approximation algorithm for the minimum latency problem. Recently, Blum, Chalasani, Coppersmith, Pulleyblank, Raghavan, and Sudan gave the first such algorithm, obtaining an approximation ratio of 144. In this work, we present an algorithm which improves this ratio to 21.55. The development of our algorithm involves a number of techniques that seem to be of interest from the perspective of the traveling salesman problem and its variants more generally.
Vehicle Optimal Velocity Curves for Minimum-Time Maneuver
Directory of Open Access Journals (Sweden)
Li-xia Zhang
2014-02-01
Full Text Available A problem in vehicle minimum-time maneuver is the assumption that a vehicle passes through a given path in a minimal amount of time without deviating from the boundary of the given path. Vehicle handling inverse dynamics provides a new perspective to solve such problem. Based on inverse dynamics, this paper transformed the problem of optimal vehicle velocity for minimum-time maneuver into that of optimal control with the objective function of minimum time. The path for minimum vehicle travel time and the optimal control model were established. The optimal velocity curves for three types of paths, namely, monotonically increasing path, monotonically decreasing path, and constant radius path, were analyzed. On this basis, the optimal velocity curves were solved for two kinds of concrete paths: a path of decreasing curvature radius followed by a path of increasing curvature radius and another path of increasing curvature radius followed by a path of decreasing curvature radius. Nine cases of possible optimal velocity curves were acquired. The optimal velocity curve of the given path, that is, a parabola followed by a semicircle, was obtained. Optimal velocity curves can be used as reference for vehicle minimum-time maneuver, which is an important issue for driver safety in fast-moving vehicles.
On the Minimum Distance of Non Binary LDPC Codes
Pulikkoonattu, Rethnakaran
2009-01-01
Minimum distance is an important parameter of a linear error correcting code. For improved performance of binary Low Density Parity Check (LDPC) codes, we need to have the minimum distance grow fast with n, the codelength. However, the best we can hope for is a linear growth in dmin with n. For binary LDPC codes, the necessary and sufficient conditions on the LDPC ensemble parameters, to ensure linear growth of minimum distance is well established. In the case of non-binary LDPC codes, the structure of logarithmic weight codewords is different from that of binary codes. We have carried out a preliminary study on the logarithmic bound on the the minimum distance of non-binary LDPC code ensembles. In particular, we have investigated certain configurations which would lead to low weight codewords. A set of simulations are performed to identify some of these configurations. Finally, we have provided a bound on the logarithmic minimum distance of nonbinary codes, using a strategy similar to the girth bound for bin...
Minimum Weight Cycles and Triangles: Equivalences and Algorithms
Roditty, Liam
2011-01-01
We consider the fundamental algorithmic problem of finding a cycle of minimum weight in a weighted graph. In particular, we show that the minimum weight cycle problem in an undirected n-node graph with edge weights in {1,...,M} or in a directed n-node graph with edge weights in {-M,..., M} and no negative cycles can be efficiently reduced to finding a minimum weight triangle in an Theta(n)-node undirected graph with weights in {1,...,O(M)}. Roughly speaking, our reductions imply the following surprising phenomenon: a minimum cycle with an arbitrary number of weighted edges can be "encoded" using only three edges within roughly the same weight interval! This resolves a longstanding open problem posed by Itai and Rodeh [SIAM J. Computing 1978 and STOC'77]. A direct consequence of our efficient reductions are O (Mn^{omega})-time algorithms using fast matrix multiplication (FMM) for finding a minimum weight cycle in both undirected graphs with integral weights from the interval [1,M] and directed graphs with inte...
Environmental Assessment for Education Center Buckley Air Force Base, Colorado
2006-07-01
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Quasi-greedy triangulations approximating the minimum weight triangulation
Energy Technology Data Exchange (ETDEWEB)
Levcopoulos, C.; Krznaric, D. [Lund Univ. (Sweden)
1996-12-31
This paper settles the following two open problems: (1) What is the worst-case approximation ratio between the greedy and the minimum weight triangulation? (2) Is there a polynomial time algorithm that always pro- duces a triangulation whose length is within a constant factor from the minimum? The answer to the first question is that the known {Omega}({radical}n) lower bound is tight. The second question is answered in the affirmative by using a slight modification of an O(n log n) algorithm for the greedy triangulation. We also derive some other interesting results. For example, we show that a constant-factor approximation of the minimum weight convex partition can be obtained within the same time bounds.
Split-plot fractional designs: Is minimum aberration enough?
DEFF Research Database (Denmark)
Kulahci, Murat; Ramirez, Jose; Tobias, Randy
2006-01-01
Split-plot experiments are commonly used in industry for product and process improvement. Recent articles on designing split-plot experiments concentrate on minimum aberration as the design criterion. Minimum aberration has been criticized as a design criterion for completely randomized fractional...... factorial design and alternative criteria, such as the maximum number of clear two-factor interactions, are suggested (Wu and Hamada (2000)). The need for alternatives to minimum aberration is even more acute for split-plot designs. In a standard split-plot design, there are several types of two...... for completely randomized designs. Consequently, we provide a modified version of the maximum number of clear two-factor interactions design criterion to be used for split-plot designs....
Minimum-Cost Reachability for Priced Timed Automata
DEFF Research Database (Denmark)
Behrmann, Gerd; Fehnker, Ansgar; Hune, Thomas Seidelin
2001-01-01
This paper introduces the model of linearly priced timed automata as an extension of timed automata, with prices on both transitions and locations. For this model we consider the minimum-cost reachability problem: i.e. given a linearly priced timed automaton and a target state, determine...... the minimum cost of executions from the initial state to the target state. This problem generalizes the minimum-time reachability problem for ordinary timed automata. We prove decidability of this problem by offering an algorithmic solution, which is based on a combination of branch-and-bound techniques...... and a new notion of priced regions. The latter allows symbolic representation and manipulation of reachable states together with the cost of reaching them....
Minimum Amount of Slop Cut in Batch Distillation
Institute of Scientific and Technical Information of China (English)
无
2006-01-01
The pulse-control operation technique which alternates between total reflux operation and total efflux operation in batch distillation was studied along with the minimum amount of slop cut.Total reflux time was confirmed by dynamic simulation, and total efflux time was adopted by statistic method. For the mixture of hexane and cyclohexane and the traditional constant reflux ratio operation strategy, the amount of slop cut is 1.8-2.1 times of the minimum amount of slop cut; whereas for the pulse-control operation strategy, it is 1.2-1.4 times of the minimum amount of slop cut. So compared with the traditional constant reflux ratio operation, the pulse-control operation can decrease the amount of slop cut and operation time, and meanwhile, enhance separation efficiency and yield.
Nursing Minimum Data Set Based on EHR Archetypes Approach.
Spigolon, Dandara N; Moro, Cláudia M C
2012-01-01
The establishment of a Nursing Minimum Data Set (NMDS) can facilitate the use of health information systems. The adoption of these sets and represent them based on archetypes are a way of developing and support health systems. The objective of this paper is to describe the definition of a minimum data set for nursing in endometriosis represent with archetypes. The study was divided into two steps: Defining the Nursing Minimum Data Set to endometriosis, and Development archetypes related to the NMDS. The nursing data set to endometriosis was represented in the form of archetype, using the whole perception of the evaluation item, organs and senses. This form of representation is an important tool for semantic interoperability and knowledge representation for health information systems.
Minimum spanning trees and random resistor networks in d dimensions.
Read, N
2005-09-01
We consider minimum-cost spanning trees, both in lattice and Euclidean models, in d dimensions. For the cost of the optimum tree in a box of size L , we show that there is a correction of order L(theta) , where theta or =1 . The arguments all rely on the close relation of Kruskal's greedy algorithm for the minimum spanning tree, percolation, and (for some arguments) random resistor networks. The scaling of the entropy and free energy at small nonzero T , and hence of the number of near-optimal solutions, is also discussed. We suggest that the Steiner tree problem is in the same universality class as the minimum spanning tree in all dimensions, as is the traveling salesman problem in two dimensions. Hence all will have the same value of theta=-3/4 in two dimensions.
Unit stream power, minimum energy dissipation rate, and river engineering
Institute of Scientific and Technical Information of China (English)
Chih Ted Yang
2010-01-01
Unit stream power is the most important and dominant parameter for the determination of transport rate of sand,gravel, and hyper-concentrated sediment with wash load.Minimum energy dissipation rate theory, or its simplified minimum unit stream power and minimum stream power theories,can provide engineers the needed theoretical basis for river morphology and river engineering studies.The Generalized Sediment Transport model for Alluvial River Simulation computer mode series have been developed based on the above theories.The computer model series have been successfully applied in many countries.Examples will be used to illustrate the applications of the computer models to solving a wide range of river morphology and river engineering problems.
Dual interferometry with a tunable point of minimum magnetic sensitivity
Gomez, Eduardo; Hamzeloui, Saeed; Martinez, Daniel; Abediyeh, Vahide; Arias, Nieves; Valenzuela, Victor Manuel
2016-05-01
The clock transition is well known for its minimum magnetic sensitivity at B = 0. The hyperfine transition between F = 1, m = -1 and F = 2, m = 1 in 87Rb also shows a point of minimum magnetic sensitivity but it happens at a field of 3.2 Gauss. An interferometer that uses a mixture of the previous two transitions gives a minimum of magnetic sensitivity at a tunable value of the magnetic field between 0 and 3.2 Gauss. The desired magnetic field value can be selected by varying the population in each transition. The relative populations are controlled with a microwave pulse joining states in both interferometers. Support from CONACYT and Fundacion Marcos Moshinsky.
Split-plot fractional designs: Is minimum aberration enough?
DEFF Research Database (Denmark)
Kulahci, Murat; Ramirez, Jose; Tobias, Randy
2006-01-01
Split-plot experiments are commonly used in industry for product and process improvement. Recent articles on designing split-plot experiments concentrate on minimum aberration as the design criterion. Minimum aberration has been criticized as a design criterion for completely randomized fractional...... factorial design and alternative criteria, such as the maximum number of clear two-factor interactions, are suggested (Wu and Hamada (2000)). The need for alternatives to minimum aberration is even more acute for split-plot designs. In a standard split-plot design, there are several types of two...... for completely randomized designs. Consequently, we provide a modified version of the maximum number of clear two-factor interactions design criterion to be used for split-plot designs....
Minimum cell connection and separation in line segment arrangements
Alt, Helmut; Giannopoulos, Panos; Knauer, Christian
2011-01-01
We study the complexity of the following cell connection and separation problems in segment arrangements. Given a set of straight-line segments in the plane and two points a and b: (i) compute the minimum number of segments one needs to remove so that there is a path connecting a to b that does not intersect any of the remaining segments; (ii) compute the minimum number of segments one needs to remove so that the arrangement induced by the remaining segments has a single cell; (iii) compute the minimum number of segments one needs to retain so that any path connecting a to b intersects some of the retained segments. We show that problems (i) and (ii) are NP-hard, while problem (iii) is polynomial-time solvable. We also discuss special polynomial-time and fixed-parameter tractable cases.
Statistical Mechanics of the Minimum Dominating Set Problem
Zhao, Jin-Hua; Zhou, Hai-Jun
2014-01-01
The minimum dominating set problem has wide applications in network science and related fields. It consists of assembling a node set of global minimum size such that any node of the network is either in this set or is adjacent to at least one node of this set. Although this is a difficult optimization problem in general, we show it can be exactly solved by a generalized leaf-removal process if the network contains no core. If the network has an extensive core, we estimate the size of minimum dominating sets by a mean-field theory and implement a belief-propagation algorithm to obtain nearly optimal solutions. Our algorithms also perform well on real-world network instances.
Do Higher Minimum Wages Benefit Health? Evidence From the UK.
Lenhart, Otto
This study examines the link between minimum wages and health outcomes by using the introduction of the National Minimum Wage (NMW) in the United Kingdom in 1999 as an exogenous variation of earned income. A test for health effects by using longitudinal data from the British Household Panel Survey for a period of ten years was conducted. It was found that the NMW significantly improved several measures of health, including self-reported health status and the presence of health conditions. When examining potential mechanisms, it was shown that changes in health behaviors, leisure expenditures, and financial stress can explain the observed improvements in health.
The Minimum Core for Numeracy Audit and Test
Patmore, Mark
2008-01-01
This book supports trainee teachers in the Lifelong Learning Sector in the assessment of their numeracy knowledge. A self-audit section is included to help trainees understand their level of competence and confidence in numeracy and will help them identify any gaps in their knowledge and skills. This is followed by exercises and activities to support and enhance learning. The book covers all the content of the LLUK standards for the minimum core for numeracy. Coverage and assessment of the minimum core have to be embedded in all Certificate and Diploma courses leading to QTLS and ATLS status.
The Minimum Core for Language and Literacy Audit and Test
Machin, Lynn
2007-01-01
This book supports trainee teachers in the Lifelong Learning Sector in the assessment of their literacy knowledge. A self-audit section is included to help trainees understand their level of competence and confidence in literacy and will help them identify any gaps in their knowledge and skills. This is followed by exercises and activities to support and enhance learning. The book covers all the content of the LLUK standards for the minimum core for literacy. Coverage and assessment of the minimum core have to be embedded in all Certificate and Diploma courses leading to QTLS and ATLS status.
How minimum detectable displacement in a GNSS Monitoring Network change?
Hilmi Erkoç, Muharrem; Doǧan, Uǧur; Aydın, Cüneyt
2016-04-01
The minimum detectable displacement in a geodetic monitoring network shows the displacement magnitude which may be just discriminated with known error probabilities. This displacement, which is originally deduced from sensitivity analysis, depends on network design, observation accuracy, datum of the network, direction of the displacement and power of the statistical test used for detecting the displacements. One may investigate how different scenarios on network design and observation accuracies influence the minimum detectable displacements for the specified datum, a-priorly forecasted directions and assumed power of the test and decide which scenario is the best or most optimum. It is sometimes difficult to forecast directions of the displacements. In that case, the minimum detectable displacements in a geodetic monitoring network are derived on the eigen-directions associated with the maximum eigen-values of the network stations. This study investigates how minimum detectable displacements in a GNSS monitoring network change depending on the accuracies of the network stations. For this, CORS-TR network in Turkey with 15 stations (a station fixed) is used. The data with 4h, 6h, 12 h and 24 h observing session duration in three sequential days of 2011, 2012 and 2013 were analyzed with Bernese 5.2 GNSS software. The repeatabilities of the daily solutions belonging to each year were analyzed carefully to scale the Bernese cofactor matrices properly. The root mean square (RMS) values for daily repeatability with respect to the combined 3-day solution are computed (the RMS values are generally less than 2 mm in the horizontal directions (north and east) and < 5 mm in the vertical direction for 24 h observing session duration). With the obtained cofactor matrices for these observing sessions, the minimum detectable displacements along the (maximum) eigen directions are compared each other. According to these comparisons, more session duration less minimum detectable
Minimum Pay Scale and Career Length in the NBA
Johnny Ducking; Peter A. Groothuis; James Richard Hill
2012-01-01
We use data from the National Basketball Association (NBA) to analyze the impact of minimum salaries on an employee’s career length. The NBA has a salary structure in which the minimum salary a player can receive increases with the player’s years of experience. Salary schedules similar to the NBA’s exist in public education, federal government agencies, the Episcopalian church, and unionized industries. Even though the magnitude of the salaries in the NBA differs from other industries, this s...
Minimum length from quantum mechanics and classical general relativity.
Calmet, Xavier; Graesser, Michael; Hsu, Stephen D H
2004-11-19
We derive fundamental limits on measurements of position, arising from quantum mechanics and classical general relativity. First, we show that any primitive probe or target used in an experiment must be larger than the Planck length lP. This suggests a Planck-size minimum ball of uncertainty in any measurement. Next, we study interferometers (such as LIGO) whose precision is much finer than the size of any individual components and hence are not obviously limited by the minimum ball. Nevertheless, we deduce a fundamental limit on their accuracy of order lP. Our results imply a device independent limit on possible position measurements.
On the timing of the next great solar activity minimum
Tlatov, A. G.; Pevtsov, A. A.
2017-09-01
The long-term variations in solar activity are studied using the dataset comprised of sunspot number and 14C radioisotope timeseries. We use a novel S200 index to identify possible past Grand Minima (GM). The Maunder, Oort, Wolf and Spörer Minima fall in phase with the minimum of S200 index. We also show GM develop in clusters, with a separation of about 400-600 years between individual GM. Extending these found similarities to modern solar activity, it is predicted that next grand solar minimum may occur in about ∼ 2090 ± 20 .
Minimum emittance in storage rings with uniform or nonuniform dipoles
Directory of Open Access Journals (Sweden)
Chun-xi Wang
2009-06-01
Full Text Available A simple treatment of minimum emittance theory in storage rings is presented, favoring vector and matrix forms for a more concise picture. Both conventional uniform dipoles and nonuniform dipoles with bending radius variation are treated. Simple formulas are given for computing the minimum emittance, optimal lattice parameters, as well as effects of nonoptimal parameters. For nonuniform dipoles, analytical results are obtained for a three-piece sandwich dipole model. Minimization of the effective emittance for light sources is given in detail. Usefulness of gradient and/or nonuniform dipoles for reducing the effective emittance is addressed.
Cosmic rays during the unusual solar minimum of 2009
Gil, Agnieszka
Examine the solar activity (SA) parameters during the quite long-lasting minimum epoch 23/24 shows that their values differ substantially in comparison with those measured in previous solar minimum epochs. The Sun was extremely quiet and there were nearly no sunspots (e.g. Smith, 2011). The averaged proton density was lower during this minimum (˜ 0.70) than in the three previous minimum epochs (Jian et al., 2011). The averaged strength of the interplanetary magnetic field during the last minimum was truly low (drop of ˜ 0.36) and the solar wind dynamic pressure decrease (˜ 0.22) was noticed (McComas et al., 2008). Solar polar magnetic fields were weaker (˜ 0.40) during this minimum in comparison with the last three minimum epochs of SA (Wang et al., 2009). Kirk et al. (2009) showed that EUV polar coronal holes area was less (˜ 0.15) than at the beginning of the Solar Cycle no. 23. The solar total irradiance at 1AU was lower more than 0.2Wm (-2) than in the last minimum in 1996 (Fröhlich, 2009). Values of the solar radio flux f10.7 were smaller than for the duration of the recent four minima (Jian et al., 2011). The tilt angle of the heliospheric current sheet declined much slower during the recent minimum in comparison with the previous two. The values of galactic cosmic rays (GCR) intensity measured by neutron monitors were the highest ever recorded (e.g. Moraal and Stoker, 2010). In 2007 neutron monitors achieved values measured during the last negative polarity minimum, 1987, and continued to grow throughout the beginning of 2010. In the same time, the level of anomalous cosmic ray intensities was comparable with the 1987 minimum (Leske et al., 2013). The average amplitude of the 27-days recurrence of the GCR intensity was as high as during the previous minimum epoch 1996 (positive polarity), much higher than during minimum one Hale cycle back (Gil et al., 2012). Modzelewska and Alania (2013) showed that 27-days periodicity of the GCR intensity stable
DEFF Research Database (Denmark)
Yilmaz, Pelin; Kottmann, Renzo; Field, Dawn
2011-01-01
Here we present a standard developed by the Genomic Standards Consortium (GSC) for reporting marker gene sequences--the minimum information about a marker gene sequence (MIMARKS). We also introduce a system for describing the environment from which a biological sample originates. The 'environmental...... present the minimum information about any (x) sequence (MIxS). Adoption of MIxS will enhance our ability to analyze natural genetic diversity documented by massive DNA sequencing efforts from myriad ecosystems in our ever-changing biosphere....
Minimum ionizing particle detection by secondary electron emission
Energy Technology Data Exchange (ETDEWEB)
Faivre, J.C.; Fanet, H.; Garin, A.; Robert, J.P.; Rouger, M.; Saudinos, J.
1977-02-01
The use of secondary electron emission to detect high energy particles is investigated. Low density KCl layers have been tested to detect MeV electrons, 400-750 MeV protons and high energy deuterons. The efficiency and the secondary electron spectrum are presented. The results justify the use of low-density KCl layer to detect minimum ionizing particles.
Certification and Minimum Quality Standards when Some Consumers are Uninformed
Buehler, B.; Schuett, F.
2012-01-01
Abstract: We compare certification to a minimum quality standard (MQS) policy in a duopolistic industry where firms incur quality-dependent fixed costs and only a fraction of consumers observes the quality of the offered goods. Compared to the unregulated outcome, both profits and social welfare
Certification and minimum quality standards when some consumers are uninformed
Buehler, B.; Schütt, F.
2014-01-01
We compare certification to a minimum quality standard (MQS) policy in a duopolistic industry where firms incur quality-dependent fixed costs and only a fraction of consumers observe the quality of the offered goods. Compared to the unregulated outcome, both profits and social welfare would increase
9 CFR 205.103 - EFS-minimum information.
2010-01-01
... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false EFS-minimum information. 205.103 Section 205.103 Animals and Animal Products GRAIN INSPECTION, PACKERS AND STOCKYARDS ADMINISTRATION... debtor (see § 205.102); (5) Social security number or other approved unique identifier or, if other...
42 CFR 422.382 - Minimum net worth amount.
2010-10-01
... or 40 percent of the minimum net worth amount in cash or cash equivalents. (2) Intangible assets. An organization may include intangible assets, the value of which is based on Generally Accepted Accounting... assets. Subject to the other provisions of this section, a PSO may apply 100 percent of the GAAP...
26 CFR 11.410(b)-1 - Minimum coverage requirements.
2010-04-01
... 26 Internal Revenue 14 2010-04-01 2010-04-01 false Minimum coverage requirements. 11.410(b)-1 Section 11.410(b)-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) TEMPORARY INCOME TAX REGULATIONS UNDER THE EMPLOYEE RETIREMENT INCOME SECURITY ACT...
Polar Magnetic Field Reversals of the Sun in Maunder Minimum
Indian Academy of Sciences (India)
V. I. Makarov; A. G. Tlatov
2000-09-01
A possible scenario of polar magnetic field reversal of the Sun during the Maunder Minimum (1645-1715) is discussed using data of magnetic field reversals of the Sun for 1880-1991 and the 14C content variations in the bi-annual rings of the pine-trees in 1600-1730 yrs.
42 CFR 84.151 - Harness test; minimum requirements.
2010-10-01
... Respirators § 84.151 Harness test; minimum requirements. (a)(1) Shoulder straps employed on Type A supplied-air respirators shall be tested for strength of material, joints, and seams and must separately... harness employed on Type B supplied-air respirators shall not be uncomfortable, disturbing, or...
42 CFR 84.152 - Breathing tube test; minimum requirements.
2010-10-01
... Respirators § 84.152 Breathing tube test; minimum requirements. (a)(1) Type A and Type B supplied-air respirators shall employ one or two flexible breathing tubes of the nonkinking type which extend from the... employed on Type C supplied-air respirators of the continuous flow class shall meet the...
42 CFR 84.201 - Head harnesses; minimum requirements.
2010-10-01
... Cartridge Respirators § 84.201 Head harnesses; minimum requirements. (a)(1) Facepieces for chemical cartridge respirators other than single-use vinyl chloride shall be equipped with adjustable and replaceable... chloride respirators shall be equipped with adjustable head harnesses designed and constructed to...
29 CFR 779.508 - Eighteen-year minimum.
2010-07-01
... RETAILERS OF GOODS OR SERVICES Other Provisions Which May Affect Retail Enterprises Child Labor Provisions... 29 Labor 3 2010-07-01 2010-07-01 false Eighteen-year minimum. 779.508 Section 779.508 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL...
29 CFR 779.507 - Fourteen-year minimum.
2010-07-01
... RETAILERS OF GOODS OR SERVICES Other Provisions Which May Affect Retail Enterprises Child Labor Provisions... to other specified limits. Under the provisions of Child Labor Regulations, subpart C (§§ 570.31... 29 Labor 3 2010-07-01 2010-07-01 false Fourteen-year minimum. 779.507 Section 779.507 Labor...
29 CFR 779.506 - Sixteen-year minimum.
2010-07-01
... RETAILERS OF GOODS OR SERVICES Other Provisions Which May Affect Retail Enterprises Child Labor Provisions... 29 Labor 3 2010-07-01 2010-07-01 false Sixteen-year minimum. 779.506 Section 779.506 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR STATEMENTS OF GENERAL...
45 CFR 303.20 - Minimum organizational and staffing requirements.
2010-10-01
... requirements. (a) The organizational structure of the IV-D agency (see § 302.12) provides for administration or... supervisory authority. (b) There is an organizational structure and sufficient staff to fulfill the following... 45 Public Welfare 2 2010-10-01 2010-10-01 false Minimum organizational and staffing requirements...
Teenagers and the Minimum Wage in Retail Trade
Cotterill, Philip G.; Wadycki, Walter J.
1976-01-01
The impact of minimum wage policy on the hiring of teenagers in relation to adult laborers in retail trade has been assessed through analysis of a study sample of 353 male and 391 female retail trade employees who were part of the 1967 Survey of Economic Opportunity. (LH)
Minimum Wages, Technological Progress and Loss of Skill
DEFF Research Database (Denmark)
Larsen, Birthe
1998-01-01
productive sector and in the antiquated sector, respectively. In this framework, the implications of a shock with a minimum wage law is compared to the implications when wages are perfectly flexible. The economic variables considered are short-term and long-term unemployment, wages and wage disparity...
Researching the Minimum Wage: A Moral Economy for the Classroom.
Neverow-Turk, Vara
1991-01-01
Describes a writing assignment that requires students to research and report on what it would be like to live on minimum wage. Explains that this assignment is not really any different than the traditional assignment, it is simply more obvious about its political content because it involves an inquiry into economics rather than literature or…
State Flexibility: The Minimum Wage and Welfare Reform.
Employment Policies Inst., Washington, DC.
In 1999, Congress for the first time, is debating a federal minimum wage hike that will affect low-skilled people who have dramatically fewer options if they cannot find work. This public policy debate has been occasioned by the new state focus on welfare reform that, to some, suggests that a state flexibility approach be applied to the minimum…
Interpreting Minimum Wage Effects on Wage Distributions: A Cautionary Tale
C.J. Flinn
2003-01-01
textabstractWhile it is tempting to infer the welfare effects of minimum wage changes from empirical observations on pre- and post-change wage distributions, in this exercise we have attempted to point out the hazards of doing so. We have focused on wage distributions in this paper, but this
Minimum Plate Thickness in High-Speed Craft
DEFF Research Database (Denmark)
Pedersen, Preben Terndrup; Zhang, Shengming
1998-01-01
The minimum plate thickness requirements specified by the classification societies for high-speed craft are supposed to ensure adequate resistance to impact loads such as collision with floating objects and objects falling on the deck. The paper presents analytical methods of describing such impact...
A Practical Algorithm for the Minimum Rectilinear Steiner Tree
Institute of Scientific and Technical Information of China (English)
MA Jun; YANG Bo; MA Shaohan
2000-01-01
An O(n2) time approximation algorithm for the minimum rectilinear Steiner tree is proposed. The approximation ratio of the algorithm is strictly less than 1.5. The computing performances show the costs of the spanning trees produced by the algorithm are only 0.8% away from the optimal ones.
Toward better application of minimum area requirements in conservation planning
Pe’er, G.; Tsianou, M.A.; Franz, K.W.; Matsinos, Y.G.; Mazaris, A.D.; Storch, D.; Kopsova, L.; Verboom, J.; Baguette, M.; Stevens, V.M.; Henle, K.
2014-01-01
The Minimum Area Requirements (MAR) of species is a concept that explicitly addresses area and therefore can be highly relevant for conservation planning and policy. This study compiled a comprehensive database of MAR estimates from the literature, covering 216 terrestrial animal species from 80
Tullock's rent-seeking contest with a minimum expenditure requirement
Schoonbeek, L.; Kooreman, P.
1997-01-01
We consider a rent-seeking contest of the kind introduced by Tullock (1980) in which two players compete for a monopoly rent. We extend the contest by requiring that if a player puts forward an effort, his expenditures must be larger than or equal to some minimum level. We show that, depending on
Ant Colony Optimization and the Minimum Cut Problem
DEFF Research Database (Denmark)
Kötzing, Timo; Lehre, Per Kristian; Neumann, Frank
2010-01-01
Ant Colony Optimization (ACO) is a powerful metaheuristic for solving combinatorial optimization problems. With this paper we contribute to the theoretical understanding of this kind of algorithm by investigating the classical minimum cut problem. An ACO algorithm similar to the one that was prov...
Minimum Requirements for Core Competency in Pediatric Pharmacy Practice.
Boucher, Elizabeth A; Burke, Margaret M; Johnson, Peter N; Klein, Kristin C; Miller, Jamie L
2015-01-01
Colleges of pharmacy provide varying amounts of didactic and clinical hours in pediatrics resulting in variability in the knowledge, skills, and perceptions of new graduates toward pediatric pharmaceutical care. The Pediatric Pharmacy Advocacy Group (PPAG) endorses the application of a minimum set of core competencies for all pharmacists involved in the care of hospitalized children.
Minimum-incision metatarsal ray resection: an observational case series.
Roukis, Thomas S
2010-01-01
This report describes the results of 17 metatarsal ray resections performed through a minimal incision in 13 consecutive patients. Each patient underwent minimum-incision metatarsal ray resection for either definitive treatment or as the index incision and drainage procedure followed by transmetatarsal amputation. There were 10 male and 3 female patients with a mean age of 68.8 +/- 8.5 years (range, 59-83 years). Twelve patients had diabetes mellitus and 7 had critical limb ischemia. There were 11 right feet and 6 left feet involved, and 3 second, 3 third, 3 fourth, and 8 fifth minimum-incision metatarsal ray resections performed. Direct primary-incision closure was performed 7 times (1 with adjacent percutaneous metatarsal osteotomy), delayed primary closure was performed 4 times (1 with external fixation), and conversion to a transmetatarsal amputation was performed 2 times. Fourteen of 17 minimum-incision metatarsal ray resections were deemed successful. Two failures occurred when skin necrosis developed from excessive tension along the incision line requiring conversion to a transmetatarsal amputation, and the other occurred in a patient with unreconstructed critical limb ischemia who underwent multiple repeated incision and drainage procedures and vascular bypass with ultimate healing via secondary intent. When properly performed in patients with adequate vascular inflow, minimum-incision metatarsal ray resection as the definitive procedure or in conjunction with an incision and drainage for unsalvageable toe infection or gangrene represents a safe, simple, useful technique.
5 CFR 9901.407 - Minimum period of performance.
2010-01-01
... period of performance is 90 calendar days. (1) Periods during which an employee is in a leave status may... RELATIONS SYSTEMS (DEPARTMENT OF DEFENSE-OFFICE OF PERSONNEL MANAGEMENT) DEPARTMENT OF DEFENSE NATIONAL SECURITY PERSONNEL SYSTEM (NSPS) Performance Management § 9901.407 Minimum period of performance. (a)...
Minimum-cost dynamic flows: The series-parallel case
Klinz, Bettina; Woeginger, Gerhard J.
2004-01-01
A dynamic network consists of a directed graph with capacities, costs, and integral transit times on the arcs. In the minimum-cost dynamic flow problem (MCDFP), the goal is to compute, for a given dynamic network with source s, sink t, and two integers v and T, a feasible dynamic flow from s to t of
Minimum Competency Testing: A Report of Four Regional Conferences.
Miller, Barbara Soloth, Ed.
Summaries are presented of the problems and issues of minimum competency testing which were discussed at four regional conferences for political and educational practitioners. The Education Commission of the States sponsored the conferences, but took no official position of support or opposition. Section 1 compares the legislative, practitioner,…
State Minimum Core Curricula: Arkansas Institutions of Higher Education, 2000.
Arkansas State Dept. of Higher Education, Little Rock.
This document provides state minimum core curricula for each two- and four-year institution of higher education in Arkansas, determined by the Department of Higher Education. Courses within this core are to apply toward the general education core curriculum requirements for baccalaureate degrees at state-supported institutions and should be fully…
State Minimum Core Curricula: Arkansas Institutions of Higher Education, 2003.
Arkansas State Dept. of Higher Education, Little Rock.
In 1990 the Arkansas State Board of Higher Education adopted guidelines for the development of state minimum core curriculum response to state legislation. This legislation provides that courses within the core shall apply to the general education core curriculum requirements for baccalaureate degrees at state-supported institutions and shall be…
12 CFR 1261.15 - Minimum number of member directorships.
2010-01-01
... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Minimum number of member directorships. 1261.15 Section 1261.15 Banks and Banking FEDERAL HOUSING FINANCE AGENCY FEDERAL HOME LOAN BANKS FEDERAL HOME LOAN BANK DIRECTORS Federal Home Loan Bank Boards of Directors: Eligibility and Elections § 1261.15...
42 CFR 422.514 - Minimum enrollment requirements.
2010-10-01
... organization's management and providers have previous experience in managing and providing health care services... organization is capable of bearing risk, CMS considers factors such as the organization's management experience... Medicare Advantage Organizations § 422.514 Minimum enrollment requirements. (a) Basic rule. Except as...
Generating Approximative Minimum Length Paths in 3D for UAVs
DEFF Research Database (Denmark)
Schøler, Flemming; la Cour-Harbo, Anders; Bisgaard, Morten
2012-01-01
We consider the challenge of planning a minimum length path from an initial position to a desired position for a rotorcraft. The path is found in a 3-dimensional Euclidean space containing a geometric obstacle. We base our approach on visibility graphs which have been used extensively for path pl...
Predicting minimum fluidization velocities of multi-component solid mixtures
Institute of Scientific and Technical Information of China (English)
Mohammad Asif
2013-01-01
Employing well-established mixing rules for mean properties,appropriate expressions are aerivea for predicting minimum fluidization velocities of multi-component solid mixtures in terms of monocomponent values for the velocity and the bed voidage at incipient fluidization.Based on flow regime and the mixing level of constituent species,it is found that these relationships differ significantly from each other,whether related to size-different or density-different mixtures.For mixed beds of size-different mixtures,the effect of volume contraction is accounted for by the mean voidage term,which is absent for segregated beds.Incorporating the volume-change of mixing leads to values of the mixture minimum fluidization velocities even lower than corresponding values for segregated bed,thus conforming to the trend reported in the literature.Size-different mixtures exhibit flow regime dependence irrespective of whether the bed is mixed or segregated.On the other hand,the mixing of constituent species does not affect the minimum fluidization velocity of density-different mixtures,as the difference in the expressions for a segregated and a mixed system is rather inconsequential.Comparison with experimental data available in the literature is made to test the efficacy of the minimum fluidization velocity expressions derived here.
28 CFR 50.24 - Annuity broker minimum qualifications.
2010-07-01
... insurance policy, or an equivalent form of insurance; (4) The broker must never have had a license to be a... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Annuity broker minimum qualifications. 50.24 Section 50.24 Judicial Administration DEPARTMENT OF JUSTICE (CONTINUED) STATEMENTS OF POLICY §...
A note on minimum-variance theory and beyond
Energy Technology Data Exchange (ETDEWEB)
Feng Jianfeng [Department of Informatics, Sussex University, Brighton, BN1 9QH (United Kingdom); Tartaglia, Giangaetano [Physics Department, Rome University ' La Sapienza' , Rome 00185 (Italy); Tirozzi, Brunello [Physics Department, Rome University ' La Sapienza' , Rome 00185 (Italy)
2004-04-30
We revisit the minimum-variance theory proposed by Harris and Wolpert (1998 Nature 394 780-4), discuss the implications of the theory on modelling the firing patterns of single neurons and analytically find the optimal control signals, trajectories and velocities. Under the rate coding assumption, input control signals employed in the minimum-variance theory should be Fitts processes rather than Poisson processes. Only if information is coded by interspike intervals, Poisson processes are in agreement with the inputs employed in the minimum-variance theory. For the integrate-and-fire model with Fitts process inputs, interspike intervals of efferent spike trains are very irregular. We introduce diffusion approximations to approximate neural models with renewal process inputs and present theoretical results on calculating moments of interspike intervals of the integrate-and-fire model. Results in Feng, et al (2002 J. Phys. A: Math. Gen. 35 7287-304) are generalized. In conclusion, we present a complete picture on the minimum-variance theory ranging from input control signals, to model outputs, and to its implications on modelling firing patterns of single neurons.
36 CFR 223.221 - Establishing minimum rates.
2010-07-01
... sale of special forest products or groups of special forest products. Products must be sold for appraised value or minimum rates, whichever is higher. No products may be sold or harvested for less than... SALE AND DISPOSAL OF NATIONAL FOREST SYSTEM TIMBER Special Forest Products Appraisal and Pricing §...
Estimation of Minimum DNBR Using Cascaded Fuzzy Neural Networks
Energy Technology Data Exchange (ETDEWEB)
Kim, Dong Yeong; Yoo, Kwae Hwan; Na, Man Gyun [Chosun University, Gwangju (Korea, Republic of)
2015-05-15
This phenomenon of boiling crisis is called a departure from nucleate boiling (DNB). The DNB phenomena can influence the fuel cladding and fuel pellets. The DNB ratio (DNBR) is defined as the ratio of the expected DNB heat flux to the actual fuel rod heat flux. Since it is very important to monitor and predict the minimum DNBR in a reactor core to prevent the boiling crisis and clad melting, a number of researches have been conducted to predict DNBR values. The aim of this study is to estimate the minimum DNBR in a reactor core using the measured signals of the reactor coolant system (RCS) by applying cascaded fuzzy neural networks (CFNN) according to operating conditions. Reactor core monitoring and protection systems require minimum DNBR prediction. The CFNN can be used to optimize the minimum DNBR value through the process of adding fuzzy neural networks (FNN) repeatedly. The proposed algorithm is trained by using the data set prepared for training (development data) and verified by using another data set different (independent) from the development data. The developed CFNN models were applied to the first fuel cycle of OPR1000. The RMS errors are 0.23% and 0.12% for the positive and negative ASI, respectively.
The"minimum information about an environmental sequence" (MIENS) specification
Energy Technology Data Exchange (ETDEWEB)
Yilmaz, P.; Kottmann, R.; Field, D.; Knight, R.; Cole, J.R.; Amaral-Zettler, L.; Gilbert, J.A.; Karsch-Mizrachi, I.; Johnston, A.; Cochrane, G.; Vaughan, R.; Hunter, C.; Park, J.; Morrison, N.; Rocca-Serra, P.; Sterk, P.; Arumugam, M.; Baumgartner, L.; Birren, B.W.; Blaser, M.J.; Bonazzi, V.; Bork, P.; Buttigieg, P. L.; Chain, P.; Costello, E.K.; Huot-Creasy, H.; Dawyndt, P.; DeSantis, T.; Fierer, N.; Fuhrman, J.; Gallery, R.E.; Gibbs, R.A.; Giglio, M.G.; Gil, I. San; Gonzalez, A.; Gordon, J.I.; Guralnick, R.; Hankeln, W.; Highlander, S.; Hugenholtz, P.; Jansson, J.; Kennedy, J.; Knights, D.; Koren, O.; Kuczynski, J.; Kyrpides, N.; Larsen, R.; Lauber, C.L.; Legg, T.; Ley, R.E.; Lozupone, C.A.; Ludwig, W.; Lyons, D.; Maguire, E.; Methe, B.A.; Meyer, F.; Nakieny, S.; Nelson, K.E.; Nemergut, D.; Neufeld, J.D.; Pace, N.R.; Palanisamy, G.; Peplies, J.; Peterson, J.; Petrosino, J.; Proctor, L.; Raes, J.; Ratnasingham, S.; Ravel, J.; Relman, D.A.; Assunta-Sansone, S.; Schriml, L.; Sodergren, E.; Spor, A.; Stombaugh, J.; Tiedje, J.M.; Ward, D.V.; Weinstock, G.M.; Wendel, D.; White, O.; Wikle, A.; Wortman, J.R.; Glockner, F.O.; Bushman, F.D.; Charlson, E.; Gevers, D.; Kelley, S.T.; Neubold, L.K.; Oliver, A.E.; Pruesse, E.; Quast, C.; Schloss, P.D.; Sinha, R.; Whitely, A.
2010-10-15
We present the Genomic Standards Consortium's (GSC) 'Minimum Information about an ENvironmental Sequence' (MIENS) standard for describing marker genes. Adoption of MIENS will enhance our ability to analyze natural genetic diversity across the Tree of Life as it is currently being documented by massive DNA sequencing efforts from myriad ecosystems in our ever-changing biosphere.
Heart rate-based lactate minimum test: a reproducible method.
Strupler, M.; Muller, G.; Perret, C.
2009-01-01
OBJECTIVE: To find the individual intensity for aerobic endurance training, the lactate minimum test (LMT) seems to be a promising method. LMTs described in the literature consist of speed or work rate-based protocols, but for training prescription in daily practice mostly heart rate is used. The
A comparison between temporal and subband minimum variance adaptive beamforming
DEFF Research Database (Denmark)
Diamantis, Konstantinos; Voxen, Iben Holfort; Greenaway, Alan H.
2014-01-01
This paper compares the performance between temporal and subband Minimum Variance (MV) beamformers for medical ultrasound imaging. Both adaptive methods provide an optimized set of apodization weights but are implemented in the time and frequency domains respectively. Their performance is evaluated...
12 CFR 34.44 - Minimum appraisal standards.
2010-01-01
... 12 Banks and Banking 1 2010-01-01 2010-01-01 false Minimum appraisal standards. 34.44 Section 34.44 Banks and Banking COMPTROLLER OF THE CURRENCY, DEPARTMENT OF THE TREASURY REAL ESTATE LENDING AND... analysis to support the institution's decision to engage in the transaction; (c) Analyze and...
An Adaptive Antenna Utilizing Minimum Norm and LCMV Algorithms
Institute of Scientific and Technical Information of China (English)
M.E.Ahmed; TANZhanzhong
2005-01-01
This paper introduces a new structure based on the minimum norm and Linearly constrained minimum variance (LCMV) algorithms to highly suppress the jammers to the Global positioning system (GPS) receiver. Minimum norm can assign a deep null blindly to the jammer direction, also it doesn't introduce any false nulls like other algorithms do. So combining it with LCMV algorithm give a structure capable of adjusting the weights of the antenna array in real time to respond to the signals coming from the desired directions while highly suppresses the jammers coming from the other directions. The simulations were performed for fixed and moving jammers. Two jammers are used one of power -100dBW, the other is-120dBW. The nulls depths attained by Minimum norm alone are 88.4dB for the strong jammer and 45dB for the weak one. The simulation indicates that the new structure can give deeper nulls to the jammers directions, more than 114dB nulls depths for both jammer when they come from fixed directions and about 103dB nulls depths when they come from moving directions. The new structure not only improves the nulls depths but also can control the nulls depths. In addition, it can control the antenna gain in the directions of the useful GPS Signals.
A Vertex Oriented Approach to Minimum Cost Spanning Tree Problems
Ciftci, B.B.; Tijs, S.H.
2007-01-01
In this paper we consider spanning tree problems, where n players want to be connected to a source as cheap as possible. We introduce and analyze (n!) vertex oriented construct and charge procedures for such spanning tree situations leading in n steps to a minimum cost spanning tree and a cost shari
Soft QCD, minimum bias and diffraction: results from ALICE
Directory of Open Access Journals (Sweden)
Antonioli Pietro
2012-06-01
Full Text Available We report recent results from the ALICE experiment at the LHC for minimum bias pp collisions. This overview includes results on inelastic cross section, with analysis of single and double diffractive events; the study of hadron production mechanisms, both for inclusive and identified particles; Bose-Einstein correlations; and fluctuations in 〈PT〉.
Heart rate-based lactate minimum test: a reproducible method.
Strupler, M.; Muller, G.; Perret, C.
2009-01-01
OBJECTIVE: To find the individual intensity for aerobic endurance training, the lactate minimum test (LMT) seems to be a promising method. LMTs described in the literature consist of speed or work rate-based protocols, but for training prescription in daily practice mostly heart rate is used. The ai
Minimum Thrust Load Control for Floating Wind Turbine
DEFF Research Database (Denmark)
Christiansen, Søren; Bak, Thomas; Knudsen, Torben
2012-01-01
presents a new minimum thrust control strategy capable of stabilizing a ﬂoating wind turbine. The new control strategy explores the freedom of variable generator speed above rated wind speed. A comparison to the traditional constant speed strategy, shows improvements in structural fore-aft oscillations...
Design of Linear - and Minimum-phase FIR-equalizers
DEFF Research Database (Denmark)
Bysted, Tommy Kristensen; Jensen, K.J.; Gaunholt, Hans
1996-01-01
an error function which is quadratic in the filtercoefficients. The advantage of the quadratic function is the ability to find the optimal coefficients solving a system of linear equations without iterations.The transformation to a minimum-phase equalizer is carried out by homomorphic deconvolution...
46 CFR 64.63 - Minimum emergency venting capacity.
2010-10-01
... 46 Shipping 2 2010-10-01 2010-10-01 false Minimum emergency venting capacity. 64.63 Section 64.63... emergency venting capacity. (a) The total emergency venting capacity (Q) of the relief devices of an... ASME Code, 1974 edition, or 315. (b) The total emergency venting capacity (Q) of an insulated...
The irreducible core of a minimum cost spanning tree game
Aarts, Henricus F.M.; Driessen, Theo
1993-01-01
It is a known result that for a minimum cost spanning tree (mcst) game a Core allocation can be deduced directly from a mcst in the underlying network. To determine this Core allocation one only needs to determine a mcst in the network and it is not necessary to calculate the coalition values of the
Minimum-Cost Reachability for Priced Timed Automata
DEFF Research Database (Denmark)
Behrmann, Gerd; Fehnker, Ansgar; Hune, Thomas Seidelin;
2001-01-01
This paper introduces the model of linearly priced timed automata as an extension of timed automata, with prices on both transitions and locations. For this model we consider the minimum-cost reachability problem: i.e. given a linearly priced timed automaton and a target state, determine the mini......This paper introduces the model of linearly priced timed automata as an extension of timed automata, with prices on both transitions and locations. For this model we consider the minimum-cost reachability problem: i.e. given a linearly priced timed automaton and a target state, determine...... the minimum cost of executions from the initial state to the target state. This problem generalizes the minimum-time reachability problem for ordinary timed automata. We prove decidability of this problem by offering an algorithmic solution, which is based on a combination of branch-and-bound techniques...... and a new notion of priced regions. The latter allows symbolic representation and manipulation of reachable states together with the cost of reaching them....
77 FR 71735 - Minimum Altitudes for Use of Autopilots
2012-12-04
... Autopilots AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY: The FAA proposes to amend and harmonize minimum altitudes for use of autopilots for transport category airplanes. The proposed rule would enable the operational use of advanced autopilot and...
Generating Approximative Minimum Length Paths in 3D for UAVs
DEFF Research Database (Denmark)
Schøler, Flemming; la Cour-Harbo, Anders; Bisgaard, Morten
2012-01-01
We consider the challenge of planning a minimum length path from an initial position to a desired position for a rotorcraft. The path is found in a 3-dimensional Euclidean space containing a geometric obstacle. We base our approach on visibility graphs which have been used extensively for path pl...
Minimum Teacher Salary Legislation in New Jersey: Cui Bono?
Richards, Craig E.
1986-01-01
Provides a demographic and fiscal profile of New Jersey's schools and analyzes equity implications of minimum teacher salary legislation for poor school districts. Direct salary impacts should not destabilize local finances or create undue fiscal distress. Other states considering similar legislation should first examine their economic…
45 CFR 30.36 - Minimum amount of referrals.
2010-10-01
... to the Department of Justice § 30.36 Minimum amount of referrals. (a) Except as in paragraph (b) of this section, claims of less than $2,500 exclusive of interest, penalties, and administrative costs, or... the Financial Litigation Staff of the Executive Office for United States Attorneys in Justice prior...
A Vertex Oriented Approach to Minimum Cost Spanning Tree Problems
Ciftci, B.B.; Tijs, S.H.
2007-01-01
In this paper we consider spanning tree problems, where n players want to be connected to a source as cheap as possible. We introduce and analyze (n!) vertex oriented construct and charge procedures for such spanning tree situations leading in n steps to a minimum cost spanning tree and a cost shari
Adding Curvature to Minimum Description Length Shape Models
DEFF Research Database (Denmark)
Thodberg, Hans Henrik; Ólafsdóttir, Hildur
2003-01-01
The Minimum Description Length (MDL) approach to shape modelling seeks a compact description of a set of shapes in terms of the coordinates of marks on the shapes. It has been shown that the mark positions resulting from this optimisation to a large extent solve the so-called point correspondence...
Estimates of AGN Black Hole Mass and Minimum Variability Timescale
Institute of Scientific and Technical Information of China (English)
Guang-Zhong Xie; Luo-En Chen; Huai-Zhen Li; Li-Sheng Mao; Hong Dai; Zhao-Hua Xie; Li Ma; Shu-Bai Zhou
2005-01-01
Black hole mass is one of the fundamental physical parameters of active galactic nuclei (AGNs), for which many methods of estimation have been proposed.One set of methods assumes that the broad-line region (BLR) is gravitationally bound by the central black hole potential, so the black hole mass can be estimated from the orbital radius and the Doppler velocity. Another set of methods assumes the observed variability timescale is determined by the orbital timescale near the innermost stable orbit around the Schwarzschild black hole or the Kerr black hole,or by the characteristic timescale of the accretion disk. We collect a sample of 21AGNs, for which the minimum variability timescales have been obtained and their black hole masses (Mσ) have been well estimated from the stellar velocity dispersion or the BLR size-luminosity relation. Using the minimum variability timescales we estimated the black hole masses for 21 objects by the three different methods,the results are denoted by Ms, Mk and Md, respectively. We compared each of them with Mσ individually and found that: (1) using the minimum variability timescale with the Kerr black hole theory leads to small differences between Mσand Mk, none exceeding one order of magnitude, and the mean difference between them is about 0.53 dex; (2) using the minimum variability timescale with the Schwarzschild black hole theory leads to somewhat larger difference between Mσ and Ms: larger than one order of magnitude for 6 of the 21 sources, and the mean difference is 0.74 dex; (3) using the minimum variability timescale with the accretion disk theory leads to much larger differences between Mσ and Md, for 13of the 21 sources the differences are larger than two orders of magnitude; and the mean difference is as high as about 2.01 dex.
Newell, Felicia D; Williams, Patricia L; Watt, Cynthia G
2014-05-09
This paper aims to assess the affordability of a nutritious diet for households earning minimum wage in Nova Scotia (NS) from 2002 to 2012 using an economic simulation that includes food costing and secondary data. The cost of the National Nutritious Food Basket (NNFB) was assessed with a stratified, random sample of grocery stores in NS during six time periods: 2002, 2004/2005, 2007, 2008, 2010 and 2012. The NNFB's cost was factored into affordability scenarios for three different household types relying on minimum wage earnings: a household of four; a lone mother with three children; and a lone man. Essential monthly living expenses were deducted from monthly net incomes using methods that were standardized from 2002 to 2012 to determine whether adequate funds remained to purchase a basic nutritious diet across the six time periods. A 79% increase to the minimum wage in NS has resulted in a decrease in the potential deficit faced by each household scenario in the period examined. However, the household of four and the lone mother with three children would still face monthly deficits ($44.89 and $496.77, respectively, in 2012) if they were to purchase a nutritiously sufficient diet. As a social determinant of health, risk of food insecurity is a critical public health issue for low wage earners. While it is essential to increase the minimum wage in the short term, adequately addressing income adequacy in NS and elsewhere requires a shift in thinking from a focus on minimum wage towards more comprehensive policies ensuring an adequate livable income for everyone.
Reference respiratory waveforms by minimum jerk model analysis
Energy Technology Data Exchange (ETDEWEB)
Anetai, Yusuke, E-mail: anetai@radonc.med.osaka-u.ac.jp; Sumida, Iori; Takahashi, Yutaka; Yagi, Masashi; Mizuno, Hirokazu; Ogawa, Kazuhiko [Department of Radiation Oncology, Osaka University Graduate School of Medicine, Yamadaoka 2-2, Suita-shi, Osaka 565-0871 (Japan); Ota, Seiichi [Department of Medical Technology, Osaka University Hospital, Yamadaoka 2-15, Suita-shi, Osaka 565-0871 (Japan)
2015-09-15
Purpose: CyberKnife{sup ®} robotic surgery system has the ability to deliver radiation to a tumor subject to respiratory movements using Synchrony{sup ®} mode with less than 2 mm tracking accuracy. However, rapid and rough motion tracking causes mechanical tracking errors and puts mechanical stress on the robotic joint, leading to unexpected radiation delivery errors. During clinical treatment, patient respiratory motions are much more complicated, suggesting the need for patient-specific modeling of respiratory motion. The purpose of this study was to propose a novel method that provides a reference respiratory wave to enable smooth tracking for each patient. Methods: The minimum jerk model, which mathematically derives smoothness by means of jerk, or the third derivative of position and the derivative of acceleration with respect to time that is proportional to the time rate of force changed was introduced to model a patient-specific respiratory motion wave to provide smooth motion tracking using CyberKnife{sup ®}. To verify that patient-specific minimum jerk respiratory waves were being tracked smoothly by Synchrony{sup ®} mode, a tracking laser projection from CyberKnife{sup ®} was optically analyzed every 0.1 s using a webcam and a calibrated grid on a motion phantom whose motion was in accordance with three pattern waves (cosine, typical free-breathing, and minimum jerk theoretical wave models) for the clinically relevant superior–inferior directions from six volunteers assessed on the same node of the same isocentric plan. Results: Tracking discrepancy from the center of the grid to the beam projection was evaluated. The minimum jerk theoretical wave reduced the maximum-peak amplitude of radial tracking discrepancy compared with that of the waveforms modeled by cosine and typical free-breathing model by 22% and 35%, respectively, and provided smooth tracking for radial direction. Motion tracking constancy as indicated by radial tracking discrepancy
29 CFR 525.12 - Terms and conditions of special minimum wage certificates.
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Terms and conditions of special minimum wage certificates... Terms and conditions of special minimum wage certificates. (a) A special minimum wage certificate shall specify the terms and conditions under which it is granted. (b) A special minimum wage certificate shall...
41 CFR 50-202.2 - Minimum wage in all industries.
2010-07-01
... 41 Public Contracts and Property Management 1 2010-07-01 2010-07-01 true Minimum wage in all... Public Contracts PUBLIC CONTRACTS, DEPARTMENT OF LABOR 202-MINIMUM WAGE DETERMINATIONS Groups of Industries § 50-202.2 Minimum wage in all industries. In all industries, the minimum wage applicable to...
29 CFR 510.23 - Agricultural activities eligible for minimum wage phase-in.
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Agricultural activities eligible for minimum wage phase-in..., DEPARTMENT OF LABOR REGULATIONS IMPLEMENTATION OF THE MINIMUM WAGE PROVISIONS OF THE 1989 AMENDMENTS TO THE... eligible for minimum wage phase-in. Agriculture activities eligible for an extended phase-in of the minimum...
29 CFR 525.13 - Renewal of special minimum wage certificates.
2010-07-01
... 29 Labor 3 2010-07-01 2010-07-01 false Renewal of special minimum wage certificates. 525.13... minimum wage certificates. (a) Applications may be filed for renewal of special minimum wage certificates.... (c) Workers with disabilities may not continue to be paid special minimum wages after notice that an...
Thermodynamic geometry of minimum-dissipation driven barrier crossing
Sivak, David A.; Crooks, Gavin E.
2016-11-01
We explore the thermodynamic geometry of a simple system that models the bistable dynamics of nucleic acid hairpins in single molecule force-extension experiments. Near equilibrium, optimal (minimum-dissipation) driving protocols are governed by a generalized linear response friction coefficient. Our analysis demonstrates that the friction coefficient of the driving protocols is sharply peaked at the interface between metastable regions, which leads to minimum-dissipation protocols that drive rapidly within a metastable basin, but then linger longest at the interface, giving thermal fluctuations maximal time to kick the system over the barrier. Intuitively, the same principle applies generically in free energy estimation (both in steered molecular dynamics simulations and in single-molecule experiments), provides a design principle for the construction of thermodynamically efficient coupling between stochastic objects, and makes a prediction regarding the construction of evolved biomolecular motors.
PORTFOLIO COMPOSITION WITH MINIMUM VARIANCE: COMPARISON WITH MARKET BENCHMARKS
Directory of Open Access Journals (Sweden)
Daniel Menezes Cavalcante
2016-07-01
Full Text Available Portfolio optimization strategies are advocated as being able to allow the composition of stocks portfolios that provide returns above market benchmarks. This study aims to determine whether, in fact, portfolios based on the minimum variance strategy, optimized by the Modern Portfolio Theory, are able to achieve earnings above market benchmarks in Brazil. Time series of 36 securities traded on the BM&FBOVESPA have been analyzed in a long period of time (1999-2012, with sample windows of 12, 36, 60 and 120 monthly observations. The results indicated that the minimum variance portfolio performance is superior to market benchmarks (CDI and IBOVESPA in terms of return and risk-adjusted return, especially in medium and long-term investment horizons.
Global Approach for Calculation of Minimum Miscibility Pressure
DEFF Research Database (Denmark)
Jessen, Kristian; Michelsen, Michael Locht; Stenby, Erling Halfdan
1998-01-01
An algorithm has been developed for calculation of minimum miscibility pressure (MMP) for the displacement of oil by multicomponent gas injection. The algorithm is based on the key tie line identification approach initially addressed by Wang and Orr [Y. Wang and F.M. Orr Jr., Analytical calculation...... of minimum miscibility pressure, Fluid Phase Equilibria, 139 (1997) 101-124]. In this work a new global approach is introduced. A number of deficiencies of the sequential approach have been eliminated resulting in a robust and highly efficient algorithm. The time consumption for calculation of the MMP...... results from the key tie line identification approach are shown to be in excellent agreement with slimtube data and with other multicell/slimtube simulators presented in the literature....
Modified string method for finding minimum energy path
Samanta, Amit
2010-01-01
We present an efficient algorithm to calculate minimum energy path (MEP) and energy barriers between locally minimum points on the multidimensional potential energy surface (PES). Our method dwells the original idea of the String method [Phys. Rev. B 66, 052301 (2002)] to evolve a smooth string along a direction normal to the string. The algorithm works by identifying hyperplanes, at each discretized point, normal to path. The intermediate configurations at these discretized points are then relaxed with their motion confined to their corresponding hyperplanes. Thus the problem of finding MEP on the PES is remodeled as a set of constrained minimization problem. This provides the flexibility of using minimization algorithms faster than the steepest descent method used in the simplified string method [J. Chem. Phys.,126(16),164103 (2007)]. In our method, since each intermediate image relaxes independently, if their step lengths are not controlled kinks can form easily. We propose using a mixing scheme to advance...
Sunspots during the Maunder Minimum from Machina Coelestis by Hevelius
Carrasco, V M S; Vaquero, J M
2015-01-01
We revisited the sunspot observations published by Johannes Hevelius in his book Machina Coelestis (1679) corresponding to the period 1653-1675 (just in the middle of the Maunder Minimum). We show detailed translations of the original Latin texts describing the sunspot records and provide the general context of these sunspot observations. From this source only, we present an estimate of the annual values of the Group Sunspot Number based only on the records that explicitly inform about the presence or absence of sunspots. Although we obtain very low values of the Group Sunspot Number, in accordance with a grand minimum of solar activity, these values are significantly higher in general than the values provided by Hoyt and Schatten (1998) for the same period.
Normalized Minimum Error Entropy Algorithm with Recursive Power Estimation
Directory of Open Access Journals (Sweden)
Namyong Kim
2016-06-01
Full Text Available The minimum error entropy (MEE algorithm is known to be superior in signal processing applications under impulsive noise. In this paper, based on the analysis of behavior of the optimum weight and the properties of robustness against impulsive noise, a normalized version of the MEE algorithm is proposed. The step size of the MEE algorithm is normalized with the power of input entropy that is estimated recursively for reducing its computational complexity. The proposed algorithm yields lower minimum MSE (mean squared error and faster convergence speed simultaneously than the original MEE algorithm does in the equalization simulation. On the condition of the same convergence speed, its performance enhancement in steady state MSE is above 3 dB.
Are There Long-Run Effects of the Minimum Wage?
Sorkin, Isaac
2015-04-01
An empirical consensus suggests that there are small employment effects of minimum wage increases. This paper argues that these are short-run elasticities. Long-run elasticities, which may differ from short-run elasticities, are policy relevant. This paper develops a dynamic industry equilibrium model of labor demand. The model makes two points. First, long-run regressions have been misinterpreted because even if the short- and long-run employment elasticities differ, standard methods would not detect a difference using US variation. Second, the model offers a reconciliation of the small estimated short-run employment effects with the commonly found pass-through of minimum wage increases to product prices.
Reforming the minimum wage: Toward a psychological perspective.
Smith, Laura
2015-09-01
The field of psychology has periodically used its professional and scholarly platform to encourage national policy reform that promotes the public interest. In this article, the movement to raise the federal minimum wage is presented as an issue meriting attention from the psychological profession. Psychological support for minimum wage reform derives from health disparities research that supports the causal linkages between poverty and diminished physical and emotional well-being. Furthermore, psychological scholarship relevant to the social exclusion of low-income people not only suggests additional benefits of financially inclusive policymaking, it also indicates some of the attitudinal barriers that could potentially hinder it. Although the national living wage debate obviously extends beyond psychological parameters, psychologists are well-positioned to evaluate and contribute to it. (PsycINFO Database Record (c) 2015 APA, all rights reserved).
K-vertex-connectivity minimum augmentation for undirected unweighted graphs
Institute of Scientific and Technical Information of China (English)
无
2003-01-01
For an undirected unweighted graph G0＝(V0,E0) and a positive integer K, the K-vertex-connectivity minimum augmentation problem (K-VCMAP) is to find a minimum set of edges Emin such that the graph H0＝(V0,E0∪Emin) is K-vertex-connected. Results in the literature have given polynomial time algorithms for K-VCMAP in several special cases such as where k≤3, or G0 is a tree. However, it still remains open whether or not there exist polynomial time algorithms for K-VCMAP for any graph G0 and any integer K. In this paper, we settle the problem by describing an efficient algorithm (KUCA) with time-complexity of O(K|V(G0)|5) for the K-VCMAP for any G0 and any positive integer K.
Smoothing-Norm Preconditioning for Regularizing Minimum-Residual Methods
DEFF Research Database (Denmark)
Hansen, Per Christian; Jensen, Toke Koldborg
2006-01-01
When GMRES (or a similar minimum-residual algorithm such as RRGMRES, MINRES, or MR-II) is applied to a discrete ill-posed problem with a square matrix, in some cases the iterates can be considered as regularized solutions. We show how to precondition these methods in such a way that the iterations...... take into account a smoothing norm for the solution. This technique is well established for CGLS, but it does not immediately carry over to minimum-residual methods when the smoothing norm is a seminorm or a Sobolev norm. We develop a new technique which works for any smoothing norm of the form $\\|L......\\,x\\|_2$ and which preserves symmetry if the coefficient matrix is symmetric. We also discuss the efficient implementation of our preconditioning technique, and we demonstrate its performance with numerical examples in one and two dimensions....
Kernel methods and minimum contrast estimators for empirical deconvolution
Delaigle, Aurore
2010-01-01
We survey classical kernel methods for providing nonparametric solutions to problems involving measurement error. In particular we outline kernel-based methodology in this setting, and discuss its basic properties. Then we point to close connections that exist between kernel methods and much newer approaches based on minimum contrast techniques. The connections are through use of the sinc kernel for kernel-based inference. This `infinite order' kernel is not often used explicitly for kernel-based deconvolution, although it has received attention in more conventional problems where measurement error is not an issue. We show that in a comparison between kernel methods for density deconvolution, and their counterparts based on minimum contrast, the two approaches give identical results on a grid which becomes increasingly fine as the bandwidth decreases. In consequence, the main numerical differences between these two techniques are arguably the result of different approaches to choosing smoothing parameters.
Approximating the Minimum Tour Cover of a Digraph
Directory of Open Access Journals (Sweden)
Viet Hung Nguyen
2011-04-01
Full Text Available Given a directed graph G with non-negative cost on the arcs, a directed tour cover T of G is a cycle (not necessarily simple in G such that either head or tail (or both of them of every arc in G is touched by T. The minimum directed tour cover problem (DToCP, which is to find a directed tour cover of minimum cost, is NP-hard. It is thus interesting to design approximation algorithms with performance guarantee to solve this problem. Although its undirected counterpart (ToCP has been studied in recent years, in our knowledge, the DToCP remains widely open. In this paper, we give a 2 log2(n-approximation algorithm for the DToCP.
Measurement of Minimum Bias Observables with the ATLAS detector
Kvita, Jiri; The ATLAS collaboration
2017-01-01
The modelling of Minimum Bias (MB) is a crucial ingredient to learn about the description of soft QCD processes. It has also a significant relevance for the simulation of the environment at the LHC with many concurrent pp interactions (“pileup”). The ATLAS collaboration has provided new measurements of the inclusive charged particle multiplicity and its dependence on transverse momentum and pseudorapidity in special data sets with low LHC beam currents, recorded at center of mass energies of 8 TeV and 13 TeV. The measurements cover a wide spectrum using charged particle selections with minimum transverse momentum of both 100 MeV and 500 MeV and in various phase space regions of low and high charged particle multiplicities.
Minimum mean square error method for stripe nonuniformity correction
Institute of Scientific and Technical Information of China (English)
Weixian Qian; Qian Chen; Guohua Gu
2011-01-01
@@ Stripe nonuniformity is very typical in line infrared focal plane (IRFPA) and uncooled starring IRFPA.We develop the minimum mean square error (MMSE) method for stripe nonuniformity correction (NUC).The goal of the MMSE method is to determine the optimal NUC parameters for making the corrected image the closest to the ideal image.%Stripe nonuniformity is very typical in line infrared focal plane (IRFPA) and uncooled starring IRFPA.We develop the minimum mean square error (MMSE) method for stripe nonuniformity correction (NUC).The goal of the MMSE method is to determine the optimal NUC parameters for making the corrected image the closest to the ideal image. Moreover, this method can be achieved in one frame, making it more competitive than other scene-based NUC algorithms. We also demonstrate the calibration results of our algorithm using real and virtual infrared image sequences. The experiments verify the positive effect of our algorithm.
The encoding complexity of two dimensional range minimum data structures
DEFF Research Database (Denmark)
Brodal, Gerth Stølting; Brodnik, Andrej; Davoodi, Pooya
2013-01-01
In the two-dimensional range minimum query problem an input matrix A of dimension m ×n, m ≤ n, has to be preprocessed into a data structure such that given a query rectangle within the matrix, the position of a minimum element within the query range can be reported. We consider the space complexity...... of the encoding variant of the problem where queries have access to the constructed data structure but can not access the input matrix A, i.e. all information must be encoded in the data structure. Previously it was known how to solve the problem with space O(mn min {m,logn}) bits (and with constant query time...
Soft QCD in ATLAS: Minimum bias and diffraction studies
Sarkisyan-Grinbaum, EK; The ATLAS collaboration
2011-01-01
We present measurements on charged particle production in proton-proton collisions at centre-of-mass energies of root(s)= 0.9, 2.36 and 7 TeV recorded with the ATLAS detector at the Large Hadron Collider. Events were collected using a single-arm minimum bias trigger, charged tracks are measured with high precision in the inner tracking system. Minimum bias analysis uses data samples at all three energies, while diffractive events are studied using a sample of events at roo(s})= 7 TeV. To study diffractive interactions, the events that have hits on exactly one side of the ATLAS detector were selected. The charged particle multiplicity, pseudorapidity and transverse momentum spectra are analiyzed and compared to the predictions by various Monte Carlo models.
Analyzing the IAR with IRI During the Recent Solar Minimum
Ivanov, S.; Klenzing, J.; Simoes, F.
2012-01-01
The 2008-2009 solar minimum was deeper than any within the past century. As such, the performance of the empirical International Reference Ionosphere (IRI) model was impacted. This impact manifested as a disagreement between predicted and measured characteristic separation in frequency for a wave resonating within an Ionospheric Alfven Resonator (IAR). The predicted value of the characteristic was a factor of three lower than what was measured by the Communication/Navigation Outage Forecast System (C/NOFS). Analyzing the model performance and comparing output with measured ionospheric values showed that more than half of the inaccuracy could be explained by inaccuracies in the output of the model. The 2008-2009 solar minimum was outside of the bounds of the effectiveness of the empirical IRI model. Incorporating recent data measurements and new indices would increase the accuracy of IRI during this period.
Automatically Produced Algorithms for the Generalized Minimum Spanning Tree Problem
Directory of Open Access Journals (Sweden)
Carlos Contreras-Bolton
2016-01-01
Full Text Available The generalized minimum spanning tree problem consists of finding a minimum cost spanning tree in an undirected graph for which the vertices are divided into clusters. Such spanning tree includes only one vertex from each cluster. Despite the diverse practical applications for this problem, the NP-hardness continues to be a computational challenge. Good quality solutions for some instances of the problem have been found by combining specific heuristics or by including them within a metaheuristic. However studied combinations correspond to a subset of all possible combinations. In this study a technique based on a genotype-phenotype genetic algorithm to automatically construct new algorithms for the problem, which contain combinations of heuristics, is presented. The produced algorithms are competitive in terms of the quality of the solution obtained. This emerges from the comparison of the performance with problem-specific heuristics and with metaheuristic approaches.
Adaptive Linear Filtering Design with Minimum Symbol Error Probability Criterion
Institute of Scientific and Technical Information of China (English)
Sheng Chen
2006-01-01
Adaptive digital filtering has traditionally been developed based on the minimum mean square error (MMSE)criterion and has found ever-increasing applications in communications. This paper presents an alternative adaptive filtering design based on the minimum symbol error rate (MSER) criterion for communication applications. It is shown that the MSER filtering is smarter, as it exploits the non-Gaussian distribution of filter output effectively. Consequently, it provides significant performance gain in terms of smaller symbol error over the MMSE approach. Adopting Parzen window or kernel density estimation for a probability density function, a block-data gradient adaptive MSER algorithm is derived. A stochastic gradient adaptive MSER algorithm, referred to as the least symbol error rate, is further developed for sampleby-sample adaptive implementation of the MSER filtering. Two applications, involving single-user channel equalization and beamforming assisted receiver, are included to demonstrate the effectiveness and generality of the proposed adaptive MSER filtering approach.
Finding the Minimum Ratio Traveling Salesman Tour by Artificial Ants
Institute of Scientific and Technical Information of China (English)
马良; 崔雪丽; 姚俭
2003-01-01
Ants of artificial colony are able to generate good solutions to the famous traveling salesman problem (TSP).We propose an artificial ants algorithm for solving the minimum ratio TSP, which is more general than the standard TSP in combinatorial optimization area. In the minimum ratio TSP, another criterion concerning each edge is added, that is,the traveling salesman can have a benefit if he travels from one city to another. The objective is to minimize the ratio between total costs or distances and total benefits. The idea of this type of optimization is in some sense quite similar to that of traditional cost-benefit analysis in management science. Computational results substantiate the solution quality and efficiency of the algorithm.
Automated design of minimum drag light aircraft fuselages and nacelles
Smetana, F. O.; Fox, S. R.; Karlin, B. E.
1982-01-01
The constrained minimization algorithm of Vanderplaats is applied to the problem of designing minimum drag faired bodies such as fuselages and nacelles. Body drag is computed by a variation of the Hess-Smith code. This variation includes a boundary layer computation. The encased payload provides arbitrary geometric constraints, specified a priori by the designer, below which the fairing cannot shrink. The optimization may include engine cooling air flows entering and exhausting through specific port locations on the body.
Dynamic preconditioning of the September sea-ice extent minimum
Williams, James; Tremblay, Bruno; Newton, Robert; Allard, Richard
2016-04-01
There has been an increased interest in seasonal forecasting of the sea-ice extent in recent years, in particular the minimum sea-ice extent. We propose a dynamical mechanism, based on winter preconditioning through first year ice formation, that explains a significant fraction of the variance in the anomaly of the September sea-ice extent from the long-term linear trend. To this end, we use a Lagrangian trajectory model to backtrack the September sea-ice edge to any time during the previous winter and quantify the amount of sea-ice divergence along the Eurasian and Alaskan coastlines as well as the Fram Strait sea-ice export. We find that coastal divergence that occurs later in the winter (March, April and May) is highly correlated with the following September sea-ice extent minimum (r = -0.73). This is because the newly formed first year ice will melt earlier allowing for other feedbacks (e.g. ice albedo feedback) to start amplifying the signal early in the melt season when the solar input is large. We find that the winter mean Fram Strait sea-ice export anomaly is also correlated with the minimum sea-ice extent the following summer. Next we backtrack a synthetic ice edge initialized at the beginning of the melt season (June 1st) in order to develop hindcast models of the September sea-ice extent that do not rely on a-priori knowledge of the minimum sea-ice extent. We find that using a multi-variate regression model of the September sea-ice extent anomaly based on coastal divergence and Fram Strait ice export as predictors reduces the error by 41%. A hindcast model based on the mean DJFMA Arctic Oscillation index alone reduces the error by 24%.
An application of Hamiltonian neurodynamics using Pontryagin's Maximum (Minimum) Principle.
Koshizen, T; Fulcher, J
1995-12-01
Classical optimal control methods, notably Pontryagin's Maximum (Minimum) Principle (PMP) can be employed, together with Hamiltonians, to determine optimal system weights in Artificial Neural dynamical systems. A new learning rule based on weight equations derived using PMP is shown to be suitable for both discrete- and continuous-time systems, and moreover, can also be applied to feedback networks. Preliminary testing shows that this PMP learning rule compares favorably with Standard BackPropagations (SBP) on the XOR problem.
Calculating Minimum Detectable Impacts in Teen Pregnancy Prevention Impact Evaluations
Lorenzo Moreno; Russell Cole
2014-01-01
This brief provides an overview of how researchers can calculate the minimum detectable impacts (MDIs), which are related to power calculations, for Teen Pregnancy Prevention (TPP) evaluations. It describes a tool that evaluators can use for their own MDI calculations, and includes examples that highlight how to use the tool. A technical appendix provides more details on the formulae in the tool that inform MDI calculations.
Prediction of Minimum Spouting Velocity at Elevated Pressures and Temperatures
Institute of Scientific and Technical Information of China (English)
无
2006-01-01
Minimum spouting velocity (Ums) is one of the most important flow characteristics for proper design and operation of spouted bed reactors. Many correlations for Ums have been published since spouted bed technology was initiated in 1955. In this paper, a new correlation is developed for Ums based on 767 published experimental data covering both high pressure and high temperature conditions. The calculated and the measured results of Ums are in better agreement than other published correlations.
Aerobic Microbial Respiration In Oceanic Oxygen Minimum Zones
DEFF Research Database (Denmark)
Kalvelage, Tim; Lavik, Gaute; Jensen, Marlene Mark;
2015-01-01
denitrification and alternative anaerobic pathways of organic matter remineralization cannot account for the ammonium requirements of reported anammox rates. Here, we explore the significance of microaerobic respiration as a source of ammonium during organic matter degradation in the oxygen-deficient waters off...... suggest that microaerobic respiration is a major mode of organic matter remineralization and source of ammonium (~45-100%) in the upper oxygen minimum zones, and reconcile hitherto observed mismatches between ammonium producing and consuming processes therein....
Calculating Minimum Detectable Impacts in Teen Pregnancy Prevention Impact Evaluations
Lorenzo Moreno; Russell Cole
2014-01-01
This brief provides an overview of how researchers can calculate the minimum detectable impacts (MDIs), which are related to power calculations, for Teen Pregnancy Prevention (TPP) evaluations. It describes a tool that evaluators can use for their own MDI calculations, and includes examples that highlight how to use the tool. A technical appendix provides more details on the formulae in the tool that inform MDI calculations.
Upper bounds on minimum cardinality of exact and approximate reducts
Chikalov, Igor
2010-01-01
In the paper, we consider the notions of exact and approximate decision reducts for binary decision tables. We present upper bounds on minimum cardinality of exact and approximate reducts depending on the number of rows (objects) in the decision table. We show that the bound for exact reducts is unimprovable in the general case, and the bound for approximate reducts is almost unimprovable in the general case. © 2010 Springer-Verlag Berlin Heidelberg.
Vibrational motion in a symmetric, double minimum potential
DEFF Research Database (Denmark)
Spanget-Larsen, Jens
2015-01-01
Molecular vibrational motion in a symmetric, double minimum potential is treated by means of a quartic model potential, by reference to the tables published by Jaan Laane and the results of harmonic analyses for the stationary points. The inversion vibration of ammonia is treated in detail. - Not...... on the harmonic approximation for polyatomic molecules are appended. - Presented at a NORFA Workshop in Hirtshals, Denmark, August 1997....
MINIMUM DISCRIMINATION INFORMATION PROBLEMS VIA GENERALIZED GEOMETRIC PROGRAMMING
Institute of Scientific and Technical Information of China (English)
ZhuDetong
2003-01-01
In this paper,the quadratic program problm and minimum discrimiation in formation (MDI) problem with a set of quadratic inequality constraints and entropy constraints of density are considered.Based on the properties of the generalized geometric programming,the dual programs of thses two problems are derived.Furthermore,the duality theorms and related Kuhn-Tucker conditions for two pairs of the prime-dual programs are also established by the duality theory.
Refinement of thermal imager minimum resolvable temperature difference calculating method
Kolobrodov, V. G.; Mykytenko, V. I.
2015-11-01
Calculating methods, which accurately predict minimum resolvable temperature difference (MRTD), are of significant interest for many years. The article deals with improvement the accuracy of determining the thermal imaging system MRTD by elaboration the visual perception model. We suggest MRTD calculating algorithm, which is based on a reliable approximation of the human visual system modulation transfer function (MTF) proposed by N. Nill. There was obtained a new expression for the bandwidth evaluation, which is independent of angular size of the Foucault bar target.
Learning from minimum entropy queries in a large committee machine
Sollich, P
1996-01-01
In supervised learning, the redundancy contained in random examples can be avoided by learning from queries. Using statistical mechanics, we study learning from minimum entropy queries in a large tree-committee machine. The generalization error decreases exponentially with the number of training examples, providing a significant improvement over the algebraic decay for random examples. The connection between entropy and generalization error in multi-layer networks is discussed, and a computationally cheap algorithm for constructing queries is suggested and analysed.
The minimum information about a genome sequence (MIGS) specification
DEFF Research Database (Denmark)
Field, D; Garrity, G; Gray, T;
2008-01-01
the development of better descriptions of genomic investigations, we have formed the Genomic Standards Consortium (GSC). Here, we introduce the minimum information about a genome sequence (MIGS) specification with the intent of promoting participation in its development and discussing the resources...... that will be required to develop improved mechanisms of metadata capture and exchange. As part of its wider goals, the GSC also supports improving the 'transparency' of the information contained in existing genomic databases....
Lower bounds for the minimum distance of algebraic geometry codes
DEFF Research Database (Denmark)
Beelen, Peter
, such as the Goppa bound, the Feng-Rao bound and the Kirfel-Pellikaan bound. I will finish my talk by giving several examples. Especially for two-point codes, the generalized order bound is fairly easy to compute. As an illustration, I will indicate how a lower bound can be obtained for the minimum distance of some......A one-point AG-code is an algebraic geometry code based on a divisor whose support consists of one point. Since the discovery of the Feng-Rao lower bound for the minimum distance, there has been a renewed interest in such codes. This lower bound is also called the order bound. An alternative...... description of these codes in terms of order domains has been found. In my talk I will indicate how one can use the ideas behind the order bound to obtain a lower bound for the minimum distance of any AG-code. After this I will compare this generalized order bound with other known lower bounds...
Improved Minimum Cuts and Maximum Flows in Undirected Planar Graphs
Italiano, Giuseppe F
2010-01-01
In this paper we study minimum cut and maximum flow problems on planar graphs, both in static and in dynamic settings. First, we present an algorithm that given an undirected planar graph computes the minimum cut between any two given vertices in O(n log log n) time. Second, we show how to achieve the same O(n log log n) bound for the problem of computing maximum flows in undirected planar graphs. To the best of our knowledge, these are the first algorithms for those two problems that break the O(n log n) barrier, which has been standing for more than 25 years. Third, we present a fully dynamic algorithm that is able to maintain information about minimum cuts and maximum flows in a plane graph (i.e., a planar graph with a fixed embedding): our algorithm is able to insert edges, delete edges and answer min-cut and max-flow queries between any pair of vertices in O(n^(2/3) log^3 n) time per operation. This result is based on a new dynamic shortest path algorithm for planar graphs which may be of independent int...
Quantification of Aggregate Topology, the Minimum Dimension and Connectivity
Rai, Durgesh; Beaucage, Gregory; Ilavsky, Jan; Kammler, Hendrik
2010-03-01
The properties (electrical conductivity, diffusion coefficient, spring constant) of nanostructured ceramic aggregates can be determined only if details of the structural topology are known. For example, the mechanical strength of an aggregate depends only on the shortest average path through the aggregate, called the minimum path. Most characterization methods fail to quantify the topology. Values of the minimum dimension, associated with the minimum path, and the spectral dimension, associated with energy distribution in an aggregate have been considered only in simulations and models. Recently we have developed a method using small-angle neutron and x-ray scattering for the quantification of the details of topology in aggregated materials (Beaucage 2004, Ramachandran 2008, 2009). In situ SAXS studies of flame aerosols containing nanostructured aggregates will be presented. Their topology as a function of growth time on the millisecond time scale will be described. Beaucage G, Phys. Rev. E 70 031401 (2004).; Ramachandran R, et al. Macromolecules 41 9802-9806 (2008).; Ramachandran R, et al. Macromolecules, 42 4746-4750 (2009).
An Improved CO2-Crude Oil Minimum Miscibility Pressure Correlation
Directory of Open Access Journals (Sweden)
Hao Zhang
2015-01-01
Full Text Available Minimum miscibility pressure (MMP, which plays an important role in miscible flooding, is a key parameter in determining whether crude oil and gas are completely miscible. On the basis of 210 groups of CO2-crude oil system minimum miscibility pressure data, an improved CO2-crude oil system minimum miscibility pressure correlation was built by modified conjugate gradient method and global optimizing method. The new correlation is a uniform empirical correlation to calculate the MMP for both thin oil and heavy oil and is expressed as a function of reservoir temperature, C7+ molecular weight of crude oil, and mole fractions of volatile components (CH4 and N2 and intermediate components (CO2, H2S, and C2~C6 of crude oil. Compared to the eleven most popular and relatively high-accuracy CO2-oil system MMP correlations in the previous literature by other nine groups of CO2-oil MMP experimental data, which have not been used to develop the new correlation, it is found that the new empirical correlation provides the best reproduction of the nine groups of CO2-oil MMP experimental data with a percentage average absolute relative error (%AARE of 8% and a percentage maximum absolute relative error (%MARE of 21%, respectively.
Designing minimum data sets of health smart card system
Directory of Open Access Journals (Sweden)
Mohtaram Nematollahi
2014-10-01
Full Text Available Introduction: Nowadays different countries benefit from health system based on health cards and projects related to smart cards. Lack of facilities which cover this technology is obvious in our society. This paper aims to design Minimum Data Sets of Health Smart Card System for Iran. Method: This research was an applied descriptive study. At first, we reviewed the same projects and guidelines of selected countries and the proposed model was designed in accordance to the country’s needs, taking people’s attitude about it by Delphi technique. A data analysis in study stage of MDS(Minimum Data Sets of Health Smart Card in the selective countries was done by comparative tables and determination of similarities and differences of the MDS. In the stage of gaining credit for model, it was accomplished with descriptive statistics to the extent of absolute and relative frequency through SPSS (version 16. Results: MDS of Health Smart Card for Iran is presented in the patient’s card and health provider’s card on basisof studiesin America, Australia, Turkey and Belgium and needs of our country and after doing Delphi technique with 94 percent agreement confirmed. Conclusion: Minimum Data Sets of Health Smart Card provides continuous care for patients and communication among providers. So, it causes a decrease in the complications of threatening diseases. Collection of MDS of diseases increases the quality of care assessment
(VIGNA SUBTERRANEA [L.] VERDC.)
African Journals Online (AJOL)
User
2015-12-02
Dec 2, 2015 ... genetic enhancement of yield and quality traits through breeding. However, the ... (Fabaceae), genus Vigna and species subterranea. (Fatokun et ... Bambara nut is an important source of dietary protein .... specifically that black ants (Monomorium minimum ..... Artificial Hybridization in Bambara nut (Vigna.
Nelson, Kenneth
2008-01-01
This article draws attention to the Europeanization of social policy and the development of minimum income protection in a large number of welfare democracies. The empirical analyses are based on unique institutional and comparative data on benefit levels from the Social Assistance and Minimum Income Protection Interim Dataset. There is some evidence of convergence in benefit levels among the European countries in the new millennium, but there is no clear proof of universal ambitions to fight poverty or of the existence of a single European social model. There are still welfare front-runners and those who lag behind in this regard, not only among industrial welfare democracies in general but also in Europe.
Do Minimum Wages in Latin America and the Caribbean Matter? Evidence from 19 Countries
DEFF Research Database (Denmark)
Kristensen, Nicolai; Cunningham, Wendy
Despite the existence of minimum wage legislation in most Latin American countries, there is little empirical evidence demonstrating its impact on the distribution of wages. In this study, cross-country data for 19 Latin American and Caribbean (LAC) countries is analyzed to gain an understanding...... of if and how minimum wages affect wage distributions in LAC countries. Although there is no single minimum wage institution in the LAC region, we find regional trends. Minimum wages affect the wage distribution in both the formal and, especially, the informal sector, both at the minimum wage and at multiples...... of the minimum. The minimum does not uniformly benefit low-wage workers: in countries where the minimum wage is relatively low compared to mean wages, the minimum wage affects the more disadvantaged segments of the labor force, namely informal sector workers, women, young and older workers, and the low skilled...
Binary cluster collision dynamics and minimum energy conformations
Energy Technology Data Exchange (ETDEWEB)
Muñoz, Francisco [Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Germany); Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago (Chile); Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Avenida Ecuador 3493, Santiago (Chile); Rogan, José; Valdivia, J.A. [Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago (Chile); Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Avenida Ecuador 3493, Santiago (Chile); Varas, A. [Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago (Chile); Nano-Bio Spectroscopy Group, ETSF Scientific Development Centre, Departamento de Física de Materiales, Universidad del País Vasco UPV/EHU, Av. Tolosa 72, E-20018 San Sebastián (Spain); Kiwi, Miguel, E-mail: m.kiwi.t@gmail.com [Departamento de Física, Facultad de Ciencias, Universidad de Chile, Santiago (Chile); Centro para el Desarrollo de la Nanociencia y Nanotecnología, CEDENNA, Avenida Ecuador 3493, Santiago (Chile)
2013-10-15
The collision dynamics of one Ag or Cu atom impinging on a Au{sub 12} cluster is investigated by means of DFT molecular dynamics. Our results show that the experimentally confirmed 2D to 3D transition of Au{sub 12}→Au{sub 13} is mostly preserved by the resulting planar Au{sub 12}Ag and Au{sub 12}Cu minimum energy clusters, which is quite remarkable in view of the excess energy, well larger than the 2D–3D potential barrier height. The process is accompanied by a large s−d hybridization and charge transfer from Au to Ag or Cu. The dynamics of the collision process mainly yields fusion of projectile and target, however scattering and cluster fragmentation also occur for large energies and large impact parameters. While Ag projectiles favor fragmentation, Cu favors scattering due to its smaller mass. The projectile size does not play a major role in favoring the fragmentation or scattering channels. By comparing our collision results with those obtained by an unbiased minimum energy search of 4483 Au{sub 12}Ag and 4483 Au{sub 12}Cu configurations obtained phenomenologically, we find that there is an extra bonus: without increase of computer time collisions yield the planar lower energy structures that are not feasible to obtain using semi-classical potentials. In fact, we conclude that phenomenological potentials do not even provide adequate seeds for the search of global energy minima for planar structures. Since the fabrication of nanoclusters is mainly achieved by synthesis or laser ablation, the set of local minima configurations we provide here, and their distribution as a function of energy, are more relevant than the global minimum to analyze experimental results obtained at finite temperatures, and is consistent with the dynamical coexistence of 2D and 3D liquid Au clusters conformations obtained previously.
The Minimum Distance of Linear Codes and Fat Points
Tohaneanu, Stefan O
2011-01-01
Let $A(Z)$ be the generating matrix of some linear code with parameters $[s,n+1,d]$ over an arbitrary field $\\mathbb K$. In this paper, we associate to $A(Z)$ a set of fat points $Z \\subseteq \\mathbb P^n$, and we show that $d$, the minimum distance of the code, is bounded below by specific shifts in the graded minimal free resolution of $I_Z$, the defining ideal of $Z$. We give better bounds in the case that the support of $Z$ is a complete intersection.
The Minimum Price Guarantee Policy before and after Real Plan
Directory of Open Access Journals (Sweden)
Jackelline Favro
2014-12-01
Full Text Available This study aims to analyze the performance of the Minimum Price Guarantee Policy - MPGPin Brazil for the main agricultural products, during the 1980s and 1990s, and especially the post-Real Plan period. The research has a bibliographic and descriptive nature. The main results showed that the MPGP remains an important tool for ensuring income to farmers and the supply of selected crops in the analyzed period, but there was a reduction of public action for the new MPGP and new private instruments has revealed efficiency
Application of the minimum fuel neural network to music signals
DEFF Research Database (Denmark)
Harbo, Anders La-Cour
2004-01-01
Finding an optimal representation of a signal in an over-complete dictionary is often quite difficult. Since general results in this field are not very application friendly it truly helps to specify the framework as much as possible. We investigate the method Minimum Fuel Neural Network (MFNN......) for finding sparse representations of music signals. This method is a set of two ordinary differential equations. We argue that the most important parameter for optimal use of this method is the discretization step size, and we demonstrate that this can be a priori determined. This significantly speeds up...
Minimum 2-Tuple Dominating Set of an Interval Graph
Directory of Open Access Journals (Sweden)
Tarasankar Pramanik
2011-01-01
Full Text Available The k-tuple domination problem, for a fixed positive integer k, is to find a minimum size vertex subset such that every vertex in the graph is dominated by at least k vertices in this set. The case when k=2 is called 2-tuple domination problem or double domination problem. In this paper, the 2-tuple domination problem is studied on interval graphs from an algorithmic point of view, which takes O(n2 time, n is the total number of vertices of the interval graph.
Generalized Minimum Variance Control for MDOF Structures under Earthquake Excitation
Directory of Open Access Journals (Sweden)
Lakhdar Guenfaf
2016-01-01
Full Text Available Control of a multi-degree-of-freedom structural system under earthquake excitation is investigated in this paper. The control approach based on the Generalized Minimum Variance (GMV algorithm is developed and presented. Our approach is a generalization to multivariable systems of the GMV strategy designed initially for single-input-single-output (SISO systems. Kanai-Tajimi and Clough-Penzien models are used to generate the seismic excitations. Those models are calculated using the specific soil parameters. Simulation tests using a 3DOF structure are performed and show the effectiveness of the control method.
California's minimum-nurse-staffing legislation and nurses' wages.
Mark, Barbara; Harless, David W; Spetz, Joanne
2009-01-01
In 2004, California became the first state to implement minimum-nurse-staffing ratios in acute care hospitals. We examined the wages of registered nurses (RNs) before and after the legislation was enacted. Using four data sets-the National Sample Survey of Registered Nurses, the Current Population Survey, the National Compensation Survey, and the Occupational Employment Statistics Survey-we found that from 2000 through 2006, RNs in California metropolitan areas experienced real wage growth as much as twelve percentage points higher than the growth in the wages of nurses employed in metropolitan areas outside of California.
On a Linear Program for Minimum-Weight Triangulation
Yousefi, Arman
2011-01-01
Minimum-weight triangulation (MWT) is NP-hard. It has a polynomial-time constant-factor approximation algorithm, and a variety of effective polynomial- time heuristics that, for many instances, can find the exact MWT. Linear programs (LPs) for MWT are well-studied, but previously no connection was known between any LP and any approximation algorithm or heuristic for MWT. Here we show the first such connections: for an LP formulation due to Dantzig et al. (1985): (i) the integrality gap is bounded by a constant; (ii) given any instance, if the aforementioned heuristics find the MWT, then so does the LP.
Parameter optimization in the regularized kernel minimum noise fraction transformation
DEFF Research Database (Denmark)
Nielsen, Allan Aasbjerg; Vestergaard, Jacob Schack
2012-01-01
Based on the original, linear minimum noise fraction (MNF) transformation and kernel principal component analysis, a kernel version of the MNF transformation was recently introduced. Inspired by we here give a simple method for finding optimal parameters in a regularized version of kernel MNF...... analysis. We consider the model signal-to-noise ratio (SNR) as a function of the kernel parameters and the regularization parameter. In 2-4 steps of increasingly refined grid searches we find the parameters that maximize the model SNR. An example based on data from the DLR 3K camera system is given....
Minimum Variance Beamforming for High Frame-Rate Ultrasound Imaging
DEFF Research Database (Denmark)
Holfort, Iben Kraglund; Gran, Fredrik; Jensen, Jørgen Arendt
2007-01-01
This paper investigates the application of adaptive beamforming in medical ultrasound imaging. A minimum variance (MV) approach for near-field beamforming of broadband data is proposed. The approach is implemented in the frequency domain, and it provides a set of adapted, complex apodization...... weights for each frequency sub-band. As opposed to the conventional, Delay and Sum (DS) beamformer, this approach is dependent on the specific data. The performance of the proposed MV beamformer is tested on simulated synthetic aperture (SA) ultrasound data, obtained using Field II. For the simulations...
Stochastic evolutionary dynamics in minimum-effort coordination games
Li, Kun; Cong, Rui; Wang, Long
2016-08-01
The minimum-effort coordination game draws recently more attention for the fact that human behavior in this social dilemma is often inconsistent with the predictions of classical game theory. Here, we combine evolutionary game theory and coalescence theory to investigate this game in finite populations. Both analytic results and individual-based simulations show that effort costs play a key role in the evolution of contribution levels, which is in good agreement with those observed experimentally. Besides well-mixed populations, set structured populations have also been taken into consideration. Therein we find that large number of sets and moderate migration rate greatly promote effort levels, especially for high effort costs.
Minimum entropy density method for the time series analysis
Lee, Jeong Won; Park, Joongwoo Brian; Jo, Hang-Hyun; Yang, Jae-Suk; Moon, Hie-Tae
2009-01-01
The entropy density is an intuitive and powerful concept to study the complicated nonlinear processes derived from physical systems. We develop the minimum entropy density method (MEDM) to detect the structure scale of a given time series, which is defined as the scale in which the uncertainty is minimized, hence the pattern is revealed most. The MEDM is applied to the financial time series of Standard and Poor’s 500 index from February 1983 to April 2006. Then the temporal behavior of structure scale is obtained and analyzed in relation to the information delivery time and efficient market hypothesis.
Calculation of minimum quench energies in Rutherford cables
Wilson, M N
1996-01-01
The Minimum Quench Energy MQE of a conductor may give some indication about the likelihood of training in magnets. We have used a numerical solution of the heat flow equation to calculate the MQE of a single superconducting wire and have found the results to be in good agreement with experiment. This model was then extended to an approximate representation of Rutherford cable by including current and heat transfer between strands. Reasonable agreement with experiment has been found, although in some cases it appears that the effective thermal contact between strands is greater than expected from electrical resistance measurements.
Can spontaneous symmetry breaking occur in potential with one minimum?
Acus, A
2000-01-01
Spontaneous symmetry breaking occurs when the symmetry that a physical system possesses, is not preserved for the ground state of the system. Although the procedure of symmetry breaking is quite clear from the mathematical point of view, the physical interpretation of the phenomenon is worth to be better understood. In this note we present a simple and instructive example of the symmetry breaking in a mechanical system. It demonstrates that the spontaneous symmetry breaking can occur for the spatially extended solutions in a potential characterised by a single minimum.
An adaptive high-order minimum action method
Wan, Xiaoliang
2011-10-01
In this work, we present an adaptive high-order minimum action method for dynamical systems perturbed by small noise. We use the hp finite element method to approximate the minimal action path and nonlinear conjugate gradient method to solve the optimization problem given by the Freidlin-Wentzell least action principle. The gradient of the discrete action functional is obtained through the functional derivative and the moving mesh technique is employed to enhance the approximation accuracy. Numerical examples are given to demonstrate the efficiency and accuracy of the proposed numerical method.
The Politics of Minimum Wage in Nigeria: The Unresolved Issues
E. Chuke NWUDE
2013-01-01
One of the duties of government is to ensure the welfare of her citizens. This is also reflected in Nigerian constitution in Section 14(b) of the 1999 constitution which states that the security and welfare of the people shall be the primary purpose of government. One way through which attempt has been made to address the issue of welfare is the legislation of a national minimum wage. In this direction, between 1934 and 2011, many commissions and committees had been set up to undertake either...
Rates of Convergence of Minimum Distance Estimators and Kolmogorov's Entropy
Yatracos, Yannis G.
1985-01-01
Let $(\\mathscr{X, A})$ be a space with a $\\sigma$-field, $M = \\{P_s; s \\in \\Theta\\}$ be a family of probability measures on $\\mathscr{A}$ with $\\Theta$ arbitrary, $X_1, \\cdots, X_n$ i.i.d. observations on $P_\\theta.$ Define $\\mu_n(A) = (1/n) \\sum^n_{i = 1} I_A(X_i),$ the empirical measure indexed by $A \\in \\mathscr{A}.$ Assume $\\Theta$ is totally bounded when metrized by the $L_1$ distance between measures. Robust minimum distance estimators $\\hat{\\theta}_n$ are constructed for $\\theta$ and t...
An Improved Minimum Distance Method Based on Artificial Neural Networks
Institute of Scientific and Technical Information of China (English)
无
2002-01-01
MDM (minimum distance method) is a very popular algorithm in state recognition. But it has a presupposition, that is, the distance within one class must be shorter enough than the distance between classes. When this presupposition is not satisfied, the method is no longer valid. In order to overcome the shortcomings of MDM, an improved mi nimum distance method (IMDM) based on ANN (artificial neural networks) is presented. The simulation results demonstrate that IMDM has two advantages, that is, the rate of recognition is faster and the accuracy of recognition is higher compared with MDM.
Minimum-Time Quantum Transport with Bounded Trap Velocity
Stefanatos, Dionisis
2011-01-01
We formulate the problem of efficient transport of a quantum particle trapped in a harmonic potential which can move with a bounded velocity, as a minimum-time problem on a linear system with bounded input. We completely solve the corresponding optimal control problem and obtain an interesting bang-bang solution. These results are expected to find applications in quantum information processing, where quantum transport between the storage and processing units of a quantum computer is an essential step. They can also be extended to the efficient transport of Bose-Einstein condensates, where the ability to control them is crucial for their potential use as interferometric sensors.
Materializing a responsive interior: designing minimum energy structures
DEFF Research Database (Denmark)
Mossé, Aurélie; Kofod, Guggi; Ramsgaard Thomsen, Mette
2011-01-01
This paper discusses a series of design-led experiments investigating future possibilities for architectural materialization relying on minimum energy structures as an example of adaptive structure. The structures have been made as laminates of elastic membrane under high tension with flexible......-active structures based on dielectric-elastomer, where energy-minimization and self-organization principles become central processes for the realization of shape-changing architectural surfaces. In Reef, a concept for self-actuated ceiling surface, we examine the integration of these dynamic structures...
A Minimum Cost Handover Algorithm for Mobile Satellite Networks
Institute of Scientific and Technical Information of China (English)
Zhang Tao; Zhang Jun
2008-01-01
For mobile satellite networks,an appropriate handover scheme should be devised to shorten handover delay with optimized application of network resources.By introducing the handover cost model of service,this article proposes a rerouting triggering scheme for path optimization after handover and a new minimum cost handover algorithm for mobile satellite networks.This algorithm ensures the quality of service (QoS) parameters,such as delay,during the handover and minimizes the handover costs.Simulation indicates that this algorithm is superior to other current algorithms in guaranteeing the QoS and decreasing handover costs.
Minimum Mean Square Error Estimation Under Gaussian Mixture Statistics
Flam, John T; Kansanen, Kimmo; Ekman, Torbjorn
2011-01-01
This paper investigates the minimum mean square error (MMSE) estimation of x, given the observation y = Hx+n, when x and n are independent and Gaussian Mixture (GM) distributed. The introduction of GM distributions, represents a generalization of the more familiar and simpler Gaussian signal and Gaussian noise instance. We present the necessary theoretical foundation and derive the MMSE estimator for x in a closed form. Furthermore, we provide upper and lower bounds for its mean square error (MSE). These bounds are validated through Monte Carlo simulations.
A Review of Voiture Minimum. Le Corbusier and the Automobile
Directory of Open Access Journals (Sweden)
Christoph Schnoor
2013-03-01
Full Text Available Here is a full-on celebration of cars and someone’s addiction to cars. In its midst drives Le Corbusier. The book, Voiture Minimum. Le Corbusier and the Automobile (Cambridge, Mass. and London: MIT Press, 2011, has recently been published by Spanish architect and academic Antonio Amado. What a curious book. It is something between a detective story circling around determining the date of a single drawing (1928 or 1936 and, simultaneously, it is “Everything you always wanted to know about Le Corbusier and cars but were afraid to ask”.
Kinematically optimal robot placement for minimum time coordinated motion
Energy Technology Data Exchange (ETDEWEB)
Feddema, J.T.
1995-10-01
This paper describes an algorithm for determining the optimal placement of a robotic manipulator within a workcell for minimum time coordinated motion. The algorithm uses a simple principle of coordinated motion to estimate the time of a joint interpolated motion. Specifically, the coordinated motion profile is limited by the slowest axis. Two and six degree of freedom (DOF) examples are presented. In experimental tests on a FANUC S-800 arm, the optimal placement of the robot can improve cycle time of a robotic operation by as much as 25%. In high volume processes where the robot motion is currently the limiting factor, this increased throughput can result in substantial cost savings.
Minimum Ballistic Factor Problem of Slender Axial Symmetric Missiles
Directory of Open Access Journals (Sweden)
V. B. Tawakley
1979-01-01
Full Text Available The problem of determining the geometry of slender, axisymmetric missiles of minimum ballistic factor in hypersonic flow has been solved via the calculus of variations under the assumptions that the flow is Newtonian and the surface averaged skin-friction coefficient is constant. The study has been made for conditions of given length and diameter, given diameter and surfacearea, and given surface area and length. The earlier investigations/sup 8/ where only regular shapes were determined has been extended to cover those class of bodies which consist of regular shapes followed or preceded by zero slope shapes.
Minimum Wages, Technological Progress and Loss of Skill
DEFF Research Database (Denmark)
Larsen, Birthe
1998-01-01
This paper considers the effect of a productivity shock when the unemployed worker risks a loss of skill. This divides the workers into short-term and long-term unemployment. In this economy, the short-term unemployed and long-term unemployed in the economy search for employment in the most...... productive sector and in the antiquated sector, respectively. In this framework, the implications of a shock with a minimum wage law is compared to the implications when wages are perfectly flexible. The economic variables considered are short-term and long-term unemployment, wages and wage disparity...
The Effects of Minimum Wages on the Distribution of Family Incomes: A Non-Parametric Analysis
David Neumark; Mark Schweitzer; William Wascher
1998-01-01
The primary goal of a national minimum wage floor is to raise the incomes of poor or near-poor families with members in the work force. However, estimates of employment effects of minimum wages tell us relatively little about whether minimum wages are likely to achieve this goal; even if the disemployment effects of minimum wages are modest, minimum wage increases could result in net income losses for poor and low-income families. In this paper, we present evidence on the effects of minimum w...
Akibat Hukum Bagi Bank Bila Kewajiban Modal Inti Minimum Tidak Terpenuhi
Directory of Open Access Journals (Sweden)
Indira Retno Aryatie
2012-02-01
Full Text Available As an implementation of the Indonesian Banking Architecture policy, the government issues Bank Indonesia Regulation No. 9/16/ PBI/2007 on Minimum Tier One Capital that increases the minimum capital to 100 billion rupiah. This writing discusses the legal complication that a bank will face should it fail to fulfil the minimum ratio. Sebagai tindak lanjut dari kebijakan Arsitektur Perbankan Indonesia, pemerintah mengeluarkan Peraturan Bank Indonesia 9/16/PBI/2007 tentang Kewajiban Modal Inti Minimum Bank yang menaikkan modal inti minimum bank umum menjadi 100 miliar rupiah. Tulisan ini membahas akibat hukum yang akan dialami bank bila kewajiban modal minimum tersebut gagal dipenuhi.
EXPERIMENTAL INVESTIGATION OF MINIMUM QUANTITY LUBRICANTS IN ALLOY STEEL TURNING
Directory of Open Access Journals (Sweden)
L B Abhang
2010-07-01
Full Text Available To eliminate health and environmental problems caused by using conventional cutting fluid in the metal cutting industry, a new economical and practical approach to minimum quantity of lubrication machining technique is developed. Turning is a widely used metal removal process in manufacturing industry that involves generation of high cutting forces and temperature. Lubrication becomes critical to minimize the effects of these forces and temperature on cutting tool and work piece. Strained environment is a global problem. In metalcutting industry the use of coolant has become more problematic in terms of both employee health and environmental pollution. It is said that the use of coolant forms approximately 8-16 % of the total production costs. Development of lubricants that is eco-friendly and economically is acquiring importance. In this context, using minimum quantity of lubrication of boric acid mixed with base oil SAE 40 has proved to be a feasible alternative to the conventional cutting fluid. In the present work 10% boric acid by weight mixed with base oil SAE 40 is used as a MQL in turning process. Variations in cutting (lubricant force, cutting temp, chip thickness and surface roughness are studied under different machining conditions. The results indicate that there is a considerable improvement in machining performance with MQL assisted machining compared to dry machining.
R Coronae Borealis at the 2003 Light Minimum
Rao, N K; Shetrone, M D; Lambert, David L.; Shetrone, Matthew D.
2006-01-01
High-resolution optical spectra of R CrB obtained in 2003 March is discussed. The 2003 spectra are compared with the extensive collection of spectra from the 1995-1996 minimum. Spectroscopic features common to the two minima include sharp emission lines of neutral and singly-ionized atoms, broad emission lines including He {\\sc i}, [N {\\sc ii}] 6583 \\AA, Na D, and Ca {\\sc ii} H & K lines, and blueshifted aborption lines of Na D, and K {\\sc i} resonance lines. Prominent differences between the 2003 and 1995-96 spectra are seen. The 2003 profiles of Na D, Ca II H & K are fit by a single Gaussian but in 1995-1996 two Gaussians separated by about 200 km s$^{-1}$ were required. However, the He {\\sc i} broad emission lines are fit by a single Gaussian at all times; the emitting He and Na-Ca atoms are probably not colocated. The C$_2$ Phillips 2-0 lines are detected as sharp absorption lines in 2003 indicating presence of gas at 1300 K.The 2003 spectra show C {\\sc i} sharp emission lines at minimum light wit...
Lifted Temperature Minimum during the atmospheric evening transition
Directory of Open Access Journals (Sweden)
E. Blay-Carreras
2014-11-01
Full Text Available Observations of Lifted Temperature Minimum (LTM profiles in the nocturnal boundary layer were first reported by Ramdas and Atmanathan (1932. It was defined by the existence of a temperature minimum some centimeters above the ground. During the following decades, several research studies analyzed this phenomenon verifying its existence and postulating different hypothesis about its origin. The aim of this work is to study the existence and characteristics of LTM during the evening transition by using observations obtained during the Boundary Layer Late Afternoon and Sunset Turbulence (BLLAST campaign. Data obtained from two masts instrumented with thermocouples and wind sensors at different heights close to the ground, and a mast with radiometers are used to study the role of mechanical turbulence and radiation in LTM development. The study shows that LTM profiles can be detected under calm conditions during the day–night transition, several hours earlier than reported in previous work. These conditions are fulfilled under weak synoptic forcing during local flow shifts associated with a mountain–plain circulation in relatively complex orography. Under these special conditions, turbulence becomes a crucial parameter in determining the ideal conditions for observing LTM profiles. Additionally, LTM observed profiles are also related to a change in the atmospheric radiative characteristics under calm conditions.
Theoretical Minimum Energies to Produce Steel for Selected Conditions
Energy Technology Data Exchange (ETDEWEB)
Fruehan, R.J.; Fortini, O.; Paxton, H.W.; Brindle, R.
2000-05-01
The energy used to produce liquid steel in today's integrated and electric arc furnace (EAF) facilities is significantly higher than the theoretical minimum energy requirements. This study presents the absolute minimum energy required to produce steel from ore and mixtures of scrap and scrap alternatives. Additional cases in which the assumptions are changed to more closely approximate actual operating conditions are also analyzed. The results, summarized in Table E-1, should give insight into the theoretical and practical potentials for reducing steelmaking energy requirements. The energy values have also been converted to carbon dioxide (CO{sub 2}) emissions in order to indicate the potential for reduction in emissions of this greenhouse gas (Table E-2). The study showed that increasing scrap melting has the largest impact on energy consumption. However, scrap should be viewed as having ''invested'' energy since at one time it was produced by reducing ore. Increasing scrap melting in the BOF mayor may not decrease energy if the ''invested'' energy in scrap is considered.
Implications of the Deep Minimum for Slow Solar Wind Origin
Antiochos, S. K.; Mikic, Z.; Lionello, R.; Titov, V. S.; Linker, J. A.
2009-12-01
The origin of the slow solar wind has long been one of the most important problems in solar/heliospheric physics. Two observational constraints make this problem especially challenging. First, the slow wind has the composition of the closed-field corona, unlike the fast wind that originates on open field lines. Second, the slow wind has substantial angular extent, of order 30 degrees, which is much larger than the widths observed for streamer stalks or the widths expected theoretically for a dynamic heliospheric current sheet. We propose that the slow wind originates from an intricate network of narrow (possibly singular) open-field corridors that emanate from the polar coronal hole regions. Using topological arguments, we show that these corridors must be ubiquitous in the solar corona. The total solar eclipse in August 2008, near the lowest point of the Deep Minimum, affords an ideal opportunity to test this theory by using the ultra-high resolution Predictive Science's (PSI) eclipse model for the corona and wind. Analysis of the PSI eclipse model demonstrates that the extent and scales of the open-field corridors can account for both the angular width of the slow wind and its closed-field composition. We discuss the implications of our slow wind theory for the structure of the corona and heliosphere at the Deep Minimum and describe further observational and theoretical tests. This work has been supported by the NASA HTP, SR&T, and LWS programs.
Towards a Data Reduction for the Minimum Flip Supertree Problem
Böcker, Sebastian
2011-01-01
In computational phylogenetics, the problem of constructing a supertree of a given set of rooted input trees can be formalized in different ways, to cope with contradictory information in the input. We consider the Minimum Flip Supertree problem, where the input trees are transformed into a 0/1/?-matrix, such that each row represents a taxon, and each column represents an inner node of one of the input trees. Our goal is to find a perfect phylogeny for the input matrix requiring a minimum number of 0/1-flips, that is, corrections of 0/1-entries in the matrix. The problem is known to be NP-complete. Here, we present a parameterized data reduction with polynomial running time. The data reduction guarantees that the reduced instance has a solution if and only if the original instance has a solution. We then make our data reduction parameter-independent by using upper bounds. This allows us to preprocess an instance, and to solve the reduced instance with an arbitrary method. Different from an existing data reduc...
Design and Control of Nonlinear Mechanical Systems for Minimum Time
Directory of Open Access Journals (Sweden)
J.B. Cardoso
2008-01-01
Full Text Available This paper presents an integrated methodology for optimal design and control of nonlinear flexible mechanical systems, including minimum time problems. This formulation is implemented in an optimum design code and it is applied to the nonlinear behavior dynamic response. Damping and stiffness characteristics plus control driven forces are considered as decision variables. A conceptual separation between time variant and time invariant design parameters is presented, this way including the design space into the control space and considering the design variables as control variables not depending on time. By using time integrals through all the derivations, design and control problems are unified. In the optimization process we can use both types of variables simultaneously or by interdependent levels. For treating minimum time problems, a unit time interval is mapped onto the original time interval, then treating equally time variant and time invariant problems. The dynamic response and its sensitivity are discretized via space-time finite elements, and may be integrated either by at-once integration or step-by-step. Adjoint system approach is used to calculate the sensitivities.
Algorithms for the minimum spanning tree problem with resource allocation
Directory of Open Access Journals (Sweden)
Seiji Kataoka
2016-01-01
Full Text Available We formulate the minimum spanning tree problem with resource allocation (MSTRA in two ways, as discrete and continuous optimization problems (d-MSTRA/c-MSTRA, prove these to be NP-hard, and present algorithms to solve these problems to optimality. We reformulate d-MSTRA as the knapsack constrained minimum spanning tree problem, and solve this problem using a previously published branch-and-bound algorithm. By applying a ‘peg test’, the size of d-MSTRA is (significantly reduced. To solve c-MSTRA, we introduce the concept of f-fractionalsolution, and prove that an optimal solution can be found within this class of solutions. Based on this fact, as well as conditions for ‘pruning’ subproblems, we develop an enumerative algorithm to solve c-MSTRA to optimality. We implement these algorithms in ANSI C programming language and, through extensive numerical tests, evaluate the performance of the developed codes on various types of instances.
Constructing minimum-cost flow-dependent networks
Thomas, Doreen A.; Weng, Jia F.
2002-09-01
In the construction of a communication network, the length of the network is an important but not unique factor determining the cost of the network. Among many possible network models, Gilbert proposed a flow-dependent model in which flow demands are assigned between each pair of points in a given point set A, and the cost per unit length of a link in the network is a function of the flow through the link. In this paper we first investigate the properties of this Gilbert model: the concavity of the cost function, decomposition, local minimality, the number of Steiner points and the maximum degree of Steiner points. Then we propose three heuristics for constructing minimum cost Gilbert networks. Two of them come from the fact that generally a minimum cost Gilbert network stands between two extremes: the complete network G(A) on A and the edge-weighted Steiner minimal tree W(A) on A. The first heuristic starts with G(A) and reduces the cost by splitting angles; the second one starts with both G(A) and W(A), and reduces the cost by selecting low cost paths. As a generalisation of the second heuristic, the third heuristic constructs a new Gilbert network of less cost by hybridising known Gilbert networks. Finally we discuss some considerations in practical applications.
Proportionate Minimum Error Entropy Algorithm for Sparse System Identification
Directory of Open Access Journals (Sweden)
Zongze Wu
2015-08-01
Full Text Available Sparse system identification has received a great deal of attention due to its broad applicability. The proportionate normalized least mean square (PNLMS algorithm, as a popular tool, achieves excellent performance for sparse system identification. In previous studies, most of the cost functions used in proportionate-type sparse adaptive algorithms are based on the mean square error (MSE criterion, which is optimal only when the measurement noise is Gaussian. However, this condition does not hold in most real-world environments. In this work, we use the minimum error entropy (MEE criterion, an alternative to the conventional MSE criterion, to develop the proportionate minimum error entropy (PMEE algorithm for sparse system identification, which may achieve much better performance than the MSE based methods especially in heavy-tailed non-Gaussian situations. Moreover, we analyze the convergence of the proposed algorithm and derive a sufficient condition that ensures the mean square convergence. Simulation results confirm the excellent performance of the new algorithm.
Tip Heater for Minimum Quench Energy Measurements on Superconducting Strands
Bauer, P; Oberli, L R
1999-01-01
Superconducting strands can be characterized by their Minimum Quench Energy (MQE), i.e. the minimum heat pulse needed to trigger a quench in operation conditions (field, temperature, current), in the limit of a (temporally and spatially) d-shaped disturbance. The sub-mm/µs range of perturbation space has only recently been achieved using the electrical graphite-paste heater technique [1]. The present work has put this technique into practice for the strands of the LHC main magnets, which are designed to operate at 1.9K in peak fields of up to 9T [1]. No way has been found yet to calibrate MQE measurements. To make relative statements on the MQE of different samples possible, the reproducibility of the measurements was emphasized. First heater prototypes did not come up to this stipulation. Finally the tip-heater configuration was found to meet the requirements. It generates a heat pulse in a thin resistive graphite paste deposit on top of a small tip that is pressed against the sample with a clamp. The clamp...
Einstein-Podolsky-Rosen paradox implies a minimum achievable temperature
Rogers, David M.
2017-01-01
This work examines the thermodynamic consequences of the repeated partial projection model for coupling a quantum system to an arbitrary series of environments under feedback control. This paper provides observational definitions of heat and work that can be realized in current laboratory setups. In contrast to other definitions, it uses only properties of the environment and the measurement outcomes, avoiding references to the "measurement" of the central system's state in any basis. These definitions are consistent with the usual laws of thermodynamics at all temperatures, while never requiring complete projective measurement of the entire system. It is shown that the back action of measurement must be counted as work rather than heat to satisfy the second law. Comparisons are made to quantum jump (unravelling) and transition-probability based definitions, many of which appear as particular limits of the present model. These limits show that our total entropy production is a lower bound on traditional definitions of heat that trace out the measurement device. Examining the master equation approximation to the process at finite measurement rates, we show that most interactions with the environment make the system unable to reach absolute zero. We give an explicit formula for the minimum temperature achievable in repeatedly measured quantum systems. The phenomenon of minimum temperature offers an explanation of recent experiments aimed at testing fluctuation theorems in the quantum realm and places a fundamental purity limit on quantum computers.
Aerobic Microbial Respiration In Oceanic Oxygen Minimum Zones.
Kalvelage, Tim; Lavik, Gaute; Jensen, Marlene M; Revsbech, Niels Peter; Löscher, Carolin; Schunck, Harald; Desai, Dhwani K; Hauss, Helena; Kiko, Rainer; Holtappels, Moritz; LaRoche, Julie; Schmitz, Ruth A; Graco, Michelle I; Kuypers, Marcel M M
2015-01-01
Oxygen minimum zones are major sites of fixed nitrogen loss in the ocean. Recent studies have highlighted the importance of anaerobic ammonium oxidation, anammox, in pelagic nitrogen removal. Sources of ammonium for the anammox reaction, however, remain controversial, as heterotrophic denitrification and alternative anaerobic pathways of organic matter remineralization cannot account for the ammonium requirements of reported anammox rates. Here, we explore the significance of microaerobic respiration as a source of ammonium during organic matter degradation in the oxygen-deficient waters off Namibia and Peru. Experiments with additions of double-labelled oxygen revealed high aerobic activity in the upper OMZs, likely controlled by surface organic matter export. Consistently observed oxygen consumption in samples retrieved throughout the lower OMZs hints at efficient exploitation of vertically and laterally advected, oxygenated waters in this zone by aerobic microorganisms. In accordance, metagenomic and metatranscriptomic analyses identified genes encoding for aerobic terminal oxidases and demonstrated their expression by diverse microbial communities, even in virtually anoxic waters. Our results suggest that microaerobic respiration is a major mode of organic matter remineralization and source of ammonium (~45-100%) in the upper oxygen minimum zones, and reconcile hitherto observed mismatches between ammonium producing and consuming processes therein.
Aerobic Microbial Respiration In Oceanic Oxygen Minimum Zones.
Directory of Open Access Journals (Sweden)
Tim Kalvelage
Full Text Available Oxygen minimum zones are major sites of fixed nitrogen loss in the ocean. Recent studies have highlighted the importance of anaerobic ammonium oxidation, anammox, in pelagic nitrogen removal. Sources of ammonium for the anammox reaction, however, remain controversial, as heterotrophic denitrification and alternative anaerobic pathways of organic matter remineralization cannot account for the ammonium requirements of reported anammox rates. Here, we explore the significance of microaerobic respiration as a source of ammonium during organic matter degradation in the oxygen-deficient waters off Namibia and Peru. Experiments with additions of double-labelled oxygen revealed high aerobic activity in the upper OMZs, likely controlled by surface organic matter export. Consistently observed oxygen consumption in samples retrieved throughout the lower OMZs hints at efficient exploitation of vertically and laterally advected, oxygenated waters in this zone by aerobic microorganisms. In accordance, metagenomic and metatranscriptomic analyses identified genes encoding for aerobic terminal oxidases and demonstrated their expression by diverse microbial communities, even in virtually anoxic waters. Our results suggest that microaerobic respiration is a major mode of organic matter remineralization and source of ammonium (~45-100% in the upper oxygen minimum zones, and reconcile hitherto observed mismatches between ammonium producing and consuming processes therein.
Phylogenetic Applications of the Minimum Contradiction Approach on Continuous Characters
Directory of Open Access Journals (Sweden)
Marc Thuillard
2009-01-01
Full Text Available We describe the conditions under which a set of continuous variables or characters can be described as an X-tree or a split network. A distance matrix corresponds exactly to a split network or a valued X-tree if, after ordering of the taxa, the variables values can be embedded into a function with at most a local maximum and a local minimum, and crossing any horizontal line at most twice. In real applications, the order of the taxa best satisfying the above conditions can be obtained using the Minimum Contradiction method. This approach is applied to 2 sets of continuous characters. The first set corresponds to craniofacial landmarks in Hominids. The contradiction matrix is used to identify possible tree structures and some alternatives when they exist. We explain how to discover the main structuring characters in a tree. The second set consists of a sample of 100 galaxies. In that second example one shows how to discretize the continuous variables describing physical properties of the galaxies without disrupting the underlying tree structure.
Minimum Inhibitory Concentration Analysis of Nerium oleander against Bacterial Pathogens
Institute of Scientific and Technical Information of China (English)
M Abu Hena Mostofa Jamal; Shahedur Rahman; Md Azizul Islam; Md Rezaul Karim; Md Samsul Alam; Md Ziaur Rahman
2012-01-01
Objective: In this present study, it is tried to find out the antimicrobial effect and Minimum Inhibitory Concentration (MIC) of Nerium oleander against Bacillus subtilis (IFO 3026), Sarcina lutea (IFO 3232), Escherichia coli (IFO 3007) and Klebsiella Pneumoniae (ATTC 10031). Methods:Powered leaves were prepared and used for extraction with various solvents, viz, the petroleum ether, and chloroform extract of the oleander. All the solvent extracts were evaporated to dryness. Using the disc diffusion method, the bacterial growth were inhibited, Results: Among the solvent extracts tested, petroleum ether extract inhibited the growth of all the tested bacteria having various degrees of inhibition zones. Highest inhibitory activity was observed against E. coli (1.9 cm) and minimum inhibitory concentration was observed 2μg/ml also against E. coli. Both results were observed in case of petroleum ether extract. Petroleum ether extract also showed inhibitory zones of 1.8 cm, 1.4 cm and 1.5cm against B. subtilis, S. lutea and K. pneumoniae. On the other hand chloroform extract was observed to have inhibition zones of 1.2 cm, 1.6 cm, 1.8 cm and 1.5 cm against B. subtilis, S. lutea, E. coli and K. pneumoniae respectively. Conclusions: The study demonstrated that the petroleum ether extract of N. oleander is potentially good source of antibacterial agents. Further evaluation is necessary to identify the specific bioactive compounds, their mode of action and their nontoxic nature in vivo condition.
MIRAGE: the minimum information required for a glycomics experiment.
York, William S; Agravat, Sanjay; Aoki-Kinoshita, Kiyoko F; McBride, Ryan; Campbell, Matthew P; Costello, Catherine E; Dell, Anne; Feizi, Ten; Haslam, Stuart M; Karlsson, Niclas; Khoo, Kay-Hooi; Kolarich, Daniel; Liu, Yan; Novotny, Milos; Packer, Nicolle H; Paulson, James C; Rapp, Erdmann; Ranzinger, Rene; Rudd, Pauline M; Smith, David F; Struwe, Weston B; Tiemeyer, Michael; Wells, Lance; Zaia, Joseph; Kettner, Carsten
2014-05-01
The MIRAGE (minimum information required for a glycomics experiment) initiative was founded in Seattle, WA, in November 2011 in order to develop guidelines for reporting the qualitative and quantitative results obtained by diverse types of glycomics analyses, including the conditions and techniques that were applied to prepare the glycans for analysis and generate the primary data along with the tools and parameters that were used to process and annotate this data. These guidelines must address a broad range of issues, as glycomics data are inherently complex and are generated using diverse methods, including mass spectrometry (MS), chromatography, glycan array-binding assays, nuclear magnetic resonance (NMR) and other rapidly developing technologies. The acceptance of these guidelines by scientists conducting research on biological systems in which glycans have a significant role will facilitate the evaluation and reproduction of glycomics experiments and data that is reported in scientific journals and uploaded to glycomics databases. As a first step, MIRAGE guidelines for glycan analysis by MS have been recently published (Kolarich D, Rapp E, Struwe WB, Haslam SM, Zaia J., et al. 2013. The minimum information required for a glycomics experiment (MIRAGE) project - Improving the standards for reporting mass spectrometry-based glycoanalytic data. Mol. Cell Proteomics. 12:991-995), allowing them to be implemented and evaluated in the context of real-world glycobiology research. In this paper, we set out the historical context, organization structure and overarching objectives of the MIRAGE initiative.
Suzuki, A; Katoh, T; Ikeda, K
1998-01-01
We evaluated the effects of i.v. adenosine triphosphate (ATP) on sevoflurane minimum alveolar anesthetic concentration (MAC) and MAC-Awake. The study group included healthy patients 20-60 yr of age. The study groups for MAC-Awake determination included 49 patients who were scheduled for elective surgery. The study groups for MAC determination included 53 patients scheduled for elective surgery involving a skin incision. These patients were randomly assigned to two groups, an ATP group and a control group. The ATP group received 100 micrograms.kg-1.min-1 ATP i.v., and the control group received no medication. The ATP group and the control group were compared with regard to MAC-Awake (anesthetic concentration achieving 50% probability of eye opening in response to a verbal command) and MAC (anesthetic concentration achieving 50% probability of no movement in response to skin incision). The MAC-Awake was 0.7% +/- 0.1% in the control group (mean +/- SD) and 0.7% +/- 0.1% in the ATP group. MAC was 1.9% +/- 0.1% in the control group and 2.1% +/- 0.2% in the ATP group. The differences in MAC and MAC-Awake between the two groups were not statistically significant. We conclude that ATP infusion (100 micrograms.kg-1.min-1) has no effect on sevoflurane MAC and MAC-Awake. We found that an i.v. adenosine triphosphate infusion (100 micrograms.kg-1.min-1) has no effect on sevoflurane minimum alveolar anesthetic concentration (anesthetic concentration achieving 50% probability of no movement in response to skin incision) and minimum alveolar anesthetic concentration-Awake (anesthetic concentration achieving 50% probability of eye opening in response to a verbal command) in humans.
42 CFR 84.150 - Air-supply line tests; minimum requirements.
2010-10-01
... Respirators § 84.150 Air-supply line tests; minimum requirements. Air supply lines employed on Type A, Type B, and Type C supplied-air respirators shall meet the minimum test requirements set forth in Table 8...
Financing Human Capital Development By Increasing The Minimum Wage: Evidence From Canada
National Research Council Canada - National Science Library
Mahmoud Yousef Askari
2015-01-01
... to the Consumer Price Index (CPI) in Canada. The paper also argues that indexed minimum wage adjustments will help in fighting poverty, maintain an acceptable living standard for minimum wage workers, reduce dependence on government subsidies...
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...
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...
Solving the minimum ﬂow problem with interval bounds and ﬂows
Indian Academy of Sciences (India)
Mehdi Ghiyasvand
2012-12-01
The minimum cost ﬂow problem with interval data can be solved using two minimum cost ﬂow problems with crisp data. In this paper, the idea of Ghiyasvand was extended for solving the minimum ﬂow problem with interval-valued lower, upper bounds and ﬂows. This problem can be solved using two minimum ﬂow problems with crisp data. Then, this result is extended to networks with fuzzy lower, upper bounds and ﬂows.
A surface hopping algorithm for nonadiabatic minimum energy path calculations.
Schapiro, Igor; Roca-Sanjuán, Daniel; Lindh, Roland; Olivucci, Massimo
2015-02-15
The article introduces a robust algorithm for the computation of minimum energy paths transiting along regions of near-to or degeneracy of adiabatic states. The method facilitates studies of excited state reactivity involving weakly avoided crossings and conical intersections. Based on the analysis of the change in the multiconfigurational wave function the algorithm takes the decision whether the optimization should continue following the same electronic state or switch to a different state. This algorithm helps to overcome convergence difficulties near degeneracies. The implementation in the MOLCAS quantum chemistry package is discussed. To demonstrate the utility of the proposed procedure four examples of application are provided: thymine, asulam, 1,2-dioxetane, and a three-double-bond model of the 11-cis-retinal protonated Schiff base.
Dispersal routes reconstruction and the minimum cost arborescence problem.
Hordijk, Wim; Broennimann, Olivier
2012-09-01
We show that the dispersal routes reconstruction problem can be stated as an instance of a graph theoretical problem known as the minimum cost arborescence problem, for which there exist efficient algorithms. Furthermore, we derive some theoretical results, in a simplified setting, on the possible optimal values that can be obtained for this problem. With this, we place the dispersal routes reconstruction problem on solid theoretical grounds, establishing it as a tractable problem that also lends itself to formal mathematical and computational analysis. Finally, we present an insightful example of how this framework can be applied to real data. We propose that our computational method can be used to define the most parsimonious dispersal (or invasion) scenarios, which can then be tested using complementary methods such as genetic analysis.
Interdependence of NAFTA capital markets: A minimum variance portfolio approach
Directory of Open Access Journals (Sweden)
López-Herrera Francisco
2014-01-01
Full Text Available We estimate the long-run relationships among NAFTA capital market returns and then calculate the weights of a “time-varying minimum variance portfolio” that includes the Canadian, Mexican, and USA capital markets between March 2007 and March 2009, a period of intense turbulence in international markets. Our results suggest that the behavior of NAFTA market investors is not consistent with that of a theoretical “risk-averse” agent during periods of high uncertainty and may be either considered as irrational or attributed to a possible “home country bias”. This finding represents valuable information for portfolio managers and contributes to a better understanding of the nature of the markets in which they invest. It also has practical implications in the design of international portfolio investment policies.
Effective Algorithm for Calculation of Minimum Miscibility Pressure
DEFF Research Database (Denmark)
Jessen, Kristian; Michelsen, Michael Locht; Stenby, Erling Halfdan
1998-01-01
This paper describes a new algorithm developed for calculation of the minimum miscibility pressure (MMP) for the displacement of oil by a multicomponent injection gas. The algorithm is based on the key tie line identification approach initially studied by Wang and Orr . A new global formulation...... enrichment studies). A case study is presented based on a real reservoir fluid for which PVT studies, swelling test and slimtube experiments have been performed. The study aims at investigating the influence of the characterization, tuning and lumping procedure used for generating a fluid description...... on the prediction of the MMP. Based on the generated fluid description, a gas enrichment study is presented where the optimum mixture of two available injection gasses is determined aiming to optimize the gas injection project....
The minimum information about a genome sequence (MIGS) specification.
Field, Dawn; Garrity, George; Gray, Tanya; Morrison, Norman; Selengut, Jeremy; Sterk, Peter; Tatusova, Tatiana; Thomson, Nicholas; Allen, Michael J; Angiuoli, Samuel V; Ashburner, Michael; Axelrod, Nelson; Baldauf, Sandra; Ballard, Stuart; Boore, Jeffrey; Cochrane, Guy; Cole, James; Dawyndt, Peter; De Vos, Paul; DePamphilis, Claude; Edwards, Robert; Faruque, Nadeem; Feldman, Robert; Gilbert, Jack; Gilna, Paul; Glöckner, Frank Oliver; Goldstein, Philip; Guralnick, Robert; Haft, Dan; Hancock, David; Hermjakob, Henning; Hertz-Fowler, Christiane; Hugenholtz, Phil; Joint, Ian; Kagan, Leonid; Kane, Matthew; Kennedy, Jessie; Kowalchuk, George; Kottmann, Renzo; Kolker, Eugene; Kravitz, Saul; Kyrpides, Nikos; Leebens-Mack, Jim; Lewis, Suzanna E; Li, Kelvin; Lister, Allyson L; Lord, Phillip; Maltsev, Natalia; Markowitz, Victor; Martiny, Jennifer; Methe, Barbara; Mizrachi, Ilene; Moxon, Richard; Nelson, Karen; Parkhill, Julian; Proctor, Lita; White, Owen; Sansone, Susanna-Assunta; Spiers, Andrew; Stevens, Robert; Swift, Paul; Taylor, Chris; Tateno, Yoshio; Tett, Adrian; Turner, Sarah; Ussery, David; Vaughan, Bob; Ward, Naomi; Whetzel, Trish; San Gil, Ingio; Wilson, Gareth; Wipat, Anil
2008-05-01
With the quantity of genomic data increasing at an exponential rate, it is imperative that these data be captured electronically, in a standard format. Standardization activities must proceed within the auspices of open-access and international working bodies. To tackle the issues surrounding the development of better descriptions of genomic investigations, we have formed the Genomic Standards Consortium (GSC). Here, we introduce the minimum information about a genome sequence (MIGS) specification with the intent of promoting participation in its development and discussing the resources that will be required to develop improved mechanisms of metadata capture and exchange. As part of its wider goals, the GSC also supports improving the 'transparency' of the information contained in existing genomic databases.
Compliance with minimum information guidelines in public metabolomics repositories.
Spicer, Rachel A; Salek, Reza; Steinbeck, Christoph
2017-09-26
The Metabolomics Standards Initiative (MSI) guidelines were first published in 2007. These guidelines provided reporting standards for all stages of metabolomics analysis: experimental design, biological context, chemical analysis and data processing. Since 2012, a series of public metabolomics databases and repositories, which accept the deposition of metabolomic datasets, have arisen. In this study, the compliance of 399 public data sets, from four major metabolomics data repositories, to the biological context MSI reporting standards was evaluated. None of the reporting standards were complied with in every publicly available study, although adherence rates varied greatly, from 0 to 97%. The plant minimum reporting standards were the most complied with and the microbial and in vitro were the least. Our results indicate the need for reassessment and revision of the existing MSI reporting standards.
Polarization of silicon detectors by minimum ionizing particles
Dezillie, B; Li, Z; Verbitskaya, E
2000-01-01
This work presents quantitative predictions of the properties of highly irradiated (e.g. by high-energy particles, up to an equivalent fluence of 1x10 sup 1 sup 4 n cm sup - sup 2) silicon detectors operating at cryogenic temperature. It is shown that the exposure to the Minimum Ionising Particle (MIP) with counting rates of about 10 sup 6 cm sup - sup 2 s sup - sup 1 can influence the electric field distribution in the detector's sensitive volume. This change in the electric field distribution and its effect on the charge collection efficiency are discussed in the frame of a model based on trapping of carriers generated by MIPs. The experiment was performed at 87 K with an infrared (1030 nm) laser to simulate MIPs.
Regional Minimum Wage and the Increase in the Personal Exemption
Directory of Open Access Journals (Sweden)
Solihin Makmur Alam
2014-12-01
Full Text Available The policy of the Central Government raised the limit on Income Not Taxable (PTKP to reduce the income tax burden on workers. At the same time, local governments also raise the Regional Minimum Wage (UMR in 2013 to customize it with the level of inflation and rising prices. Some people think that the policy of the Central Government to improve the welfare of workers by doing adjustments on PTKP is useless because in fact the increase coincided with increases in PTKP UMR. In 2013, almost all local governments set the UMR under PTKP. Thus, the workers who work in these areas did not have to pay income tax. This condition does not apply to workers who work in areas that have the above PTKP UMR. The workers who work in these areas will not receive earnings as a whole. Thus, the income tax has reduced the level of their well -being.
Fast food prices, obesity, and the minimum wage.
Cotti, Chad; Tefft, Nathan
2013-03-01
Recent proposals argue that a fast food tax may be an effective policy lever for reducing population weight. Although there is growing evidence for a negative association between fast food prices and weight among adolescents, less is known about adults. That any measured relationship to date is causal is unclear because there has been no attempt to separate variation in prices on the demand side from that on the supply side. We argue that the minimum wage is an exogenous source of variation in fast food prices, conditional on income and employment. In two-stage least-squares analyses, we find little evidence that fast food price changes affect adult BMI or obesity prevalence. Results are robust to including controls for area and time fixed effects, area time trends, demographic characteristics, substitute prices, numbers of establishments and employment in related industries, and other potentially related factors. Copyright © 2012 Elsevier B.V. All rights reserved.
Stochastic evolutionary dynamics of minimum-effort coordination games
Li, Kun; Wang, Long
2016-01-01
The minimum-effort coordination game, having potentially important implications in both evolutionary biology and sociology, draws recently more attention for the fact that human behavior in this social dilemma is often inconsistent with the predictions of classic game theory. In the framework of classic game theory, any common effort level is a strict and trembling hand perfect Nash equilibrium, so that no desideratum is provided for selecting among them. Behavior experiments, however, show that the effort levels employed by subjects are inversely related to the effort costs. Here, we combine coalescence theory and evolutionary game theory to investigate this game in finite populations. Both analytic results and individual-based simulations show that effort costs play a key role in the evolution of contribution levels, which is in good agreement with those observed experimentally. Besides well-mixed populations, set structured populations, where the population structure itself is a consequence of the evolutio...
Minimum Phase Property of Chebyshev-Sharpened Cosine Filters
Directory of Open Access Journals (Sweden)
Miriam Guadalupe Cruz Jiménez
2015-01-01
Full Text Available We prove that the Chebyshev sharpening technique, recently introduced in literature, provides filters with a Minimum Phase (MP characteristic when it is applied to cosine filters. Additionally, we demonstrate that cascaded expanded Chebyshev-Sharpened Cosine Filters (CSCFs are also MP filters, and we show that they achieve a lower group delay for similar magnitude characteristics in comparison with traditional cascaded expanded cosine filters. The importance of the characteristics of cascaded expanded CSCFs is also elaborated. The developed examples show improvements in the group delay ranged from 23% to 47% at the cost of a slight increase of usage of hardware resources. For an application of a low-delay decimation filter, the proposed scheme exhibits a 24% lower group delay, with 35% less computational complexity (estimated in Additions per Output Sample and slightly less usage of hardware elements.
Minimum description length methods of medium-scale simultaneous inference
Bickel, David R
2010-01-01
Nonparametric statistical methods developed for analyzing data for high numbers of genes, SNPs, or other biological features tend to overfit data with smaller numbers of features such as proteins, metabolites, or, when expression is measured with conventional instruments, genes. For this medium-scale inference problem, the minimum description length (MDL) framework quantifies the amount of information in the data supporting a null or alternative hypothesis for each feature in terms of parametric model selection. Two new MDL techniques are proposed. First, using test statistics that are highly informative about the parameter of interest, the data are reduced to a single statistic per feature. This simplifying step is already implicit in conventional hypothesis testing and has been found effective in empirical Bayes applications to genomics data. Second, the codelength difference between the alternative and null hypotheses of any given feature can take advantage of information in the measurements from all other...
Hyperspectral data classification improved by minimum spanning forests
Dutra da Silva, Ricardo; Pedrini, Helio
2016-04-01
Remote sensing technology has applications in various knowledge domains, such as agriculture, meteorology, land use, environmental monitoring, military surveillance, and mineral exploration. The increasing advances in image acquisition techniques have allowed the generation of large volumes of data at high spectral resolution with several spectral bands representing images collected simultaneously. We propose and evaluate a supervised classification method composed of three stages. Initially, hyperspectral values and entropy information are employed by support vector machines to produce an initial classification. Then, the K-nearest neighbor technique searches for pixels with high probability of being correctly classified. Finally, minimum spanning forests are applied to these pixels to reclassify the image taking spatial restrictions into consideration. Experiments on several hyperspectral images are conducted to show the effectiveness of the proposed method.