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1

DESENVOLVIMENTO PROFISSIONAL DA DOCÊNCIA UNIVERSITÁRIA EM OUTROS CONTEXTOS  

Microsoft Academic Search

Resumo: O intuito desta exposição é apresentar, com base na análise da experiência da RED- U - Red Estatal de Docencia Universitaria constituída por universidades espanholas, uma reflexão em torno do desenvolvimento profissional do docente universitário no atual contexto de globalização. A referida rede representa um espaço para a difusão e o intercâmbio de políticas, experiências, metodologias e ferramentas utilizadas

Solange Maria Longhi

2

Aquisi??o de Estreptococos Mutans e Desenvolvimento de C?rie Dental em Primog?nitos  

PubMed Central

Objetivo Avaliar o momento de aquisição de estreptococos mutans (EM), desenvolvimento de cárie dental e as variáveis a eles associadas no decorrer de 23 meses, em primogênitos de famílias de baixo nível socioeconômico, desde os sete meses de idade. Método A amostra foi selecionada com base em mães densamente colonizadas por EM, incluindo todos os membros de 14 famílias que conviviam na mesma casa. Foram envolvidos no estudo 14 mães, pais e primogênitos e 8 parentes, na maioria avós. Exames clínicos e radiográficos iniciais determinaram os índices de cárie e condição periodontal dos adultos. Contagens de EM foram feitas em todos os adultos nas duas primeiras visitas. Nas crianças foram avaliados os níveis de EM, o número de dentes e de cáries, em quatro visitas. Resultados A prevalência de EM nos adultos foi alta, estando ausente em apenas um dos pais. EM foram detectados em 1, 2, 3 e 10 crianças, respectivamente nas visitas #1, 2, 3 e 4. A cárie dental foi detectada em apenas três crianças na última visita (aos 30 meses de idade), as quais apresentaram escores de EM significantemente maiores que as crianças sem cárie, na mesma visita. Conclusão Exclusivamente a condição social de baixa renda e mães densamente colonizadas por EM não são sinônimo de colonização precoce e alta atividade de cárie em crianças cuidadas em casa. O desenvolvimento de cárie está significantemente associado a escores elevados de EM nas crianças. PMID:22022218

NOCE, Erica; RUBIRA, Cassia Maria Fischer; da Silva ROSA, Odila Pereira; da SILVA, Salete Moura Bonifacio; BRETZ, Walter Antonio

2011-01-01

3

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM DESENVOLVIMENTO SUSTENTVEL  

E-print Network

de livro com ISBN ou paper em periódico Qualis B2 ou inferior, 15 pontos por livro ou paper em (Máximo 100 pontos) 100 (*) 7 pontos por capítulo de livro com ISBN ou paper em periódico Qualis B2 ou inferior, 15 pontos por livro ou paper em periódico Qualis B1 ou superior. (**) 2,5 por ano/projeto (***) 2

Maier, Rudolf Richard

4

O Desenvolvimento da Orientação Profissional no Brasil  

Microsoft Academic Search

RESUMO O objetivo deste artigo é descrever o desenvolvimento da Orientação Profissional brasileira, desde suas origens até a atualidade. Inicialmente, é feita uma breve recapitulação histórica do desenvolvimento da Orientação Profissional no ambiente internacional. Em seguida, são descritos os fatos históricos de mai- or relevância para o nascimento e o desenvolvimento da Orientação Profissional em nosso país, as rela- ções

Mônica Sparta

5

INCIDÊNCIA DOS FATORES DE RISCO PARA A GAGUEIRA DO DESENVOLVIMENTO EM CRIANÇAS ATENDIDAS NA CLÍNICA ESCOLA DO UNIVAG  

Microsoft Academic Search

Objetivo: Verificar a incidência dos fatores de risco para a Gagueira do Desenvolvimento nas crianças com queixa de gagueira atendidas na Clínica Escola do Univag. Método: Foram analisados os Protocolos de Risco para a gagueira do desenvolvimento de vinte e sete prontuários de crianças de dois até onze anos e onze meses que apresentaram queixa de gagueira e receberam atendimento

Santos Zamo; Daniella Thaís Curriel

6

COMPROMETIMENTO DO DESENVOLVIMENTO PONDO-ESTATURAL EM CRIANÇAS PORTADORAS DE CARDIOPATIAS CONGÊNITAS COM SHUNT CIANOGÊNICO Growth and height development changes in children with cyanogenic congenital heart disease  

Microsoft Academic Search

RESUMO Objetivo: Identificar alterações no desenvolvimento pondo-estatural de crianças com cardiopatias congênitas cianóticas (CCCs). Métodos: Tratou-se de um estudo transversal e de caráter descritivo. Estudaram-se 30 crianças com CCCs, de faixa etária entre zero e oito anos. Analisaram-se as variáveis prevalência de acometimento por sexo, tipo de malformação congênita e índices antropométricos (Peso\\/Idade, Altura\\/Idade e Peso\\/Altura) os quais foram comparados

Pinheiro DGM; Pinheiro CHJ; Marinho MJF; Denise Gonçalves Moura; Maria de Jesus Ferreira

7

Germinação de sementes e desenvolvimento de plântulas de moringa (Moringa oleifera Lam.) em função do peso da semente e do tipo de substrato  

Microsoft Academic Search

Germination of seeds and seedling development of drumstick as a function of seed weight and substrate type To compensate the shortage of information on the influence of seed weight and substrate over the germination and seedling development of Moringa oleifera an experiment was conducted under greenhouse conditions (50% of natural light with intermittent nebulization) in Fortaleza, Ceará State, Brazil. The

Antonio Marcos E. Bezerra; Valéria G. Momenté; Sebastião Medeiros Filho

2004-01-01

8

Turismo Náutico em Angra dos Reis – RJ : a sustentabilidade em questão.  

E-print Network

??Dissertação (mestrado)—Universidade de Brasília, Centro de Desenvolvimento Sustentável, 2011. O turismo está em franca expansão e se desenvolvendo a taxas bastante significativas no Brasil. Em… (more)

Medeiros, Márcio Bastos

2011-01-01

9

Modelando um ambiente de aprendizagem na Web: a importância da formalização do processo de desenvolvimento1  

Microsoft Academic Search

Resumo. Com o aumento da complexidade dos softwares educacionais em relação aos sistemas produzidos anos atrás, da diversidade de tecnologias adotadas e do grande número de pessoas envolvidas, tornou-se inadequado projetar um programa educacional sem utilizar- se um processo bem definido para orientar o se u desenvolvimento. Neste contexto, este artigo tem como objetivo descrever o processo de desenvolvimento do

Sabrina Marczak; Lucia Giraffa; Gláucio Almeida; Marcelo Blois

10

Georeferencing natural disaster impact footprints : lessons learned from the EM-DAT experience  

NASA Astrophysics Data System (ADS)

The Emergency Events Database (EM-DAT) contains data about the occurrence and consequences of all the disasters that have taken place since 1900. The main objectives of the database are to serve the purposes of humanitarian action at national and international levels; to aid decision making for disaster preparedness, as well as providing an objective base for vulnerability assessments and priority setting. EM-DAT records data on the human and economic impacts for each event as well as the location of said event. This is recorded as text data, namely the province, department, county, district, or village. The first purpose of geocoding (or georeferencing) the EM-DAT database is to transform the location data from text format into code data. The GAUL (Global Administrative Unit Layers) database (FAO) is used as a basis to identify the geographic footprint of the disaster, ideally to the second administrative level and add a unique code for each affected unit. Our first step has involved georeferencing earthquakes since the location of these is precise. The second purpose is to detail the degree of precision of georeferencing. The application and benefits of georeferencing are manifold. The geographic information of the footprint of past (after 2000) and future natural disasters permits the location of vulnerable areas with a GIS system and to cross data from different sources. It will allow the study of different elements such as the extent of a disaster and its human and economic consequences; the exposure and vulnerability of the population in space and time and the efficiency of mitigation measures. In addition, any association between events and external factors can be identified (e.g.: is the famine located at the same places as drought?) and precision of the information in the disaster report can be evaluated. Besides this, these maps will provide valuable communication support since maps have a high communication power and are easily understandable by the wider public and policy makers. Some results from the application of georeferencing will be presented during the session such as a study of the population potentially exposed and affected by natural disasters in Europe, a flood vulnerability analysis in Vietnam and the potential merging of watersheds analysis and flood footprints data.

Wallemacq, Pascaline; Guha Sapir, Debarati

2014-05-01

11

Nature  

NSDL National Science Digital Library

Nature is a weekly international journal publishing the finest peer-reviewed research in all fields of science and technology on the basis of its originality, importance, interdisciplinary interest, timeliness, accessibility, elegance, and surprising conclusions. Nature also provides rapid, authoritative, insightful and arresting news and interpretation of topical and coming trends affecting science, scientists and the wider public. Nature publishes more articles than any other multidisciplinary journal, and retains its position as the most cited weekly science journal. The site provides free access to news stories in the latest issue; access to research articles, and to the Nature archive, is by subscription.

12

Desenvolvimento de ímãs para sensor de velocidade para motor de arranque de avião  

Microsoft Academic Search

Resumo Este trabalho teve por objetivo o desenvolvimento de ímãs de ferrita a serem utilizados em sensor de velocidade para motor de arranque de um avião, fabricado pela empresa Aeromot de Canoas - RS. Dois tipos de ímãs foram solicitados pela empresa: na forma de cilindro e na forma de anel. Para a confecção dos ímãs, foi utilizada uma matéria-prima

Moisés de Mattos Dias; Lírio Schaeffer; Arão de Matos Dias; José Lesina Cezar; José Carlos; Krause de Verney

13

Estudo sobre a areia artificial em substituição à natural para confecção de concreto  

Microsoft Academic Search

This research with the objective of finding aggregate that it comes, totally, they substitute the primary natural material of rivers, it is increasing because that has been causing severe environmental impacts. This research deals with recycling of the left over residue from processing of ornamental stones known as residue from the marble cutting process and gnaisse cutting process. The experimental

Maria Teresa Gomes Barbosa; Cláudia Valéria; Gávio Cour; Larissa de Oliveira Mendes

14

"Cada ser, em si, carrega o dom de ser capaz de ser feliz" : um estudo de caso baseado em Alfred Adler, Lev Vigotski e González Rey.  

E-print Network

??Dissertação (mestrado)—Universidade de Brasília, Faculdade de Educação, 2011. As crianças que apresentam qualquer marca em seu desenvolvimento, seja um defeito físico, ausência sensorial ou, até… (more)

Batista, Anelice da Silva

2011-01-01

15

Eric Hardisty, Jordan Boyd-Graber, and Philip Resnik. Modeling Perspective using Adaptor Grammars. Em-pirical Methods in Natural Language Processing, 2010.  

E-print Network

Eric Hardisty, Jordan Boyd-Graber, and Philip Resnik. Modeling Perspective using Adaptor Grammars. Em- pirical Methods in Natural Language Processing, 2010. @inproceedings{Hardisty:Boyd-Graber:Resnik-2010, Author = {Eric Hardisty and Jordan Boyd-Graber and Philip Resnik}, Booktitle = {Empirical Methods

Boyd-Graber, Jordan

16

Determinação voltamétrica simultânea de paracetamol e cafeína e de ácido ascórbico e cafeína em formulações famacêuticas empregando um eletrodo de diamante dopado com boro.  

E-print Network

??Neste trabalho descreve-se o desenvolvimento de procedimentos eletroanalíticos para a determinação de paracetamol, ácido ascórbico (AA) e cafeína em formulações farmacêuticas utilizando um eletrodo de… (more)

Bruna Cláudia Lourenção

2010-01-01

17

RESISTÊNCIA NATURAL DE NOVE MADEIRAS DO SEMI-ÁRIDO BRASILEIRO A CUPINS SUBTERRÂNEOS, EM ENSAIO DE LABORATÓRIO  

Microsoft Academic Search

RESUMO: O objetivo da pesquisa foi avaliar a resistência de nove madeiras de ocorrência no semi- árido brasileiro a cupins subterrâneos, em condições de laboratório. As madeiras estudadas foram a al- garoba (Prosopis juliflora), angico (Piptadenia macrocarpa), aroeira (Myracrodruon urundeuva), braúna (Schinopsis brasiliensis), cássia (Senna siamea), craibeira (Tabebuia aurea), cumaru (Amburana cearenses), pau d'arco (Tabebuia impetiginosa) e o pereiro (Aspidosperma

Juarez Benigno Paes; Verlândia de Medeiros Morais; Desmoulins Wanderley; Farias Sobrinho; Olaf Andreas Bakke

18

ISOLAMENTO E IDENTIFICAÇÃO DE BACTÉRIAS CANDIDATAS A PROBIÓTICOS EM CAMARÕES DA ESPÉCIE LITOPENAEUS VANNAMEI  

Microsoft Academic Search

RESUMO O objetivo desse trabalho foi isolar e identificar bactérias candidatas a probióticos do trato intestinal de camarões da espécie Litopenaeus vannamei, em diferentes fases de desenvolvimento. Foram utilizados camarões nas fases de recria e inicial (pós-larva) e de crescimento (juvenil), os quais eram adaptados à água doce da Fazenda BAHIA PESCA, especializada em aqüicultura, localizada no município de Santo

M. M. COSTA

19

Cesio-137 E Radionuclideos Naturais Em Solos Do Sul Do Brasil E Em Solos E Outras Amostras Ambientais DA Antartica (Cesium-137 and Natural Radionuclides in Soils from Southern Brazil and in Soils and Others Environmental Samples from Antarctic).  

National Technical Information Service (NTIS)

This work presents a study of environmental artificial and natural radioactivity levels in soil samples from Southern Brazil and in soils and other environmental samples from Antarctica. Artificial radioactivity was determined by measuring Cs-137 which is...

L. A. Schuch

1993-01-01

20

Cesio-137 e radionuclideos naturais em solos do sul do Brasil e em solos e outras amostras ambientais da Antarctica. (Cesium-137 and natural radionuclides in soils from southern Brazil and soils and others environmental samples from Antarctic).  

National Technical Information Service (NTIS)

This work presents a study of environmental artificial and natural radioactivity levels in soil samples from the Southern Brazil and in soils and other environmental samples form Antarctica. Artificial radioactivity was determined by measuring Cs-137 whic...

L. A. Schuch

1993-01-01

21

Influência da temperatura no desenvolvimento de teliósporosde Phakopsora pachyrhizi em folíolos de soja  

Microsoft Academic Search

The soybean rust can be caused by two fungus species of the genus Phakopsora: P. meibomiae and P. pachyrhizi. The safest method to separate the both species is based on morphologic characteristics of the teliospores. This study was carried out to determine the effect of temperature in telia formation and to observe both telia and teliospore morphometry present in leaflets

Patrícia Ferreira Cunha Sousa; Eduardo Alves; Hilário Antônio de Castro

2006-01-01

22

Natural resources  

NSDL National Science Digital Library

Natural resources are resources that occur in nature. Humans use these resources, but many of these resources are nonrenewable. They will eventually run out. Fossil fuels are naturally occurring fuels that are nonrenewable.

Olivia Worland (Purdue University;Biological Sciences)

2008-07-07

23

Natural Polymers  

NSDL National Science Digital Library

Polymers that exist in nature, called biopolymers , include a large and diverse range of compounds. This chapter discusses the most important types of natural polymers--their chemical makeup, key properties, and where they are found. The focus will be more on the chemical and physical properties of natural polymers and less on their biological synthesis or physiological function. The references at the end of the chapter provide additional information.

Teegarden, David

2004-01-01

24

Backyard Nature  

NSDL National Science Digital Library

Created by veteran naturalist Jim Conrad, Backyard Nature is an excellent resource for information about many aspects of the natural world. The website provides extensive, well-organized sections for backyard Ecology, Plants, Animals, and Fungi -- to name just a few. The site contains a section on Naming & Classifying living things, as well as information about tools for backyard naturalists such as field guides, binoculars, nature study notebooks, and an Online Phenology Database. The site also offers an impressive list of 101 Nature-Oriented Things to Do During the Summer.

Conrad, Jim

25

Matematica Natural.  

ERIC Educational Resources Information Center

Matematica Natural (Natural Mathematics) is a mathematics curriculum for young children based on the assumption that they learn mathematics through concrete, real life, relevant experiences and that educational differences rather than cultural differences influence math achievement. The curriculum uses hands-on materials and activities to teach…

Lozano, Patricia; Medearis, Linda

26

Natural Beauty  

ERIC Educational Resources Information Center

In this article, the author describes how her art class students were able to create, in just four class periods, clay relief plaques depicting nature. A lesson on texture speeds up the completion of such a project. Seeing that clay is a natural material with its own unique texture, it seemed fitting that the final product should depict a variety…

Coy, Mary

2006-01-01

27

Firsthand Nature  

ERIC Educational Resources Information Center

It's no secret that many school programs don't give children enough opportunity to explore the natural world--i.e., to "mess about" and to have firsthand experience with nature and animals. Not so at the Muscota New School in New York City! This innovative public elementary school actively promotes inquiry-based learning and encourages teachers to…

Gostev, Moses; Weiss, Francesca Michaelides

2007-01-01

28

Natural Hazards  

NSDL National Science Digital Library

This lesson introduces students to a variety of natural hazards, emphasizing that when people understand these threats they are better able to avoid or reduce their potential impacts. First, the class discusses what they know about natural hazards and natural disasters. Then, working in pairs, they research particular hazards; the threats they pose and where and when those threats are most pronounced. Following this research period, the class assembles what they have learned into a general overview of natural hazards nationwide. Following the second class discussion, students work in pairs again to explore the hazards that affect particular towns, cities, or regions of the country. In doing so, they learn more about how and why certain natural hazards impact specific areas, as well as what people are doing to minimize the threats these hazards pose.

2006-01-01

29

Natural Gas  

NASA Astrophysics Data System (ADS)

Natural gas is a naturally occurring mixture of simple hydrocarbons and nonhydrocarbons that exists as a gas at ordinary pressures and temperatures. In the raw state, as produced from the earth, natural gas consists principally of methane (CH4) and ethane (C2H4), with fractional amounts of propane (C3H8), butane (C4H10), and other hydrocarbons, pentane (C5H12) and heavier. Occasionally, small traces of light aromatic hydrocarbons such as benzene and toluene may also be present.

Maddox, Robert N.; Moshfeghian, Mahmood; Ldol, James D.; Johannes, Arland H.

30

natural selection  

NSDL National Science Digital Library

Charles Darwin's theory of natural selection was the first plausible mechanism to explain the change of species over time, however, in it's original form it did not explain how new traits could form, or how traits that had formed could be passed on to successive generations. The rise in modern genetics helped to modify biologists understanding of evolution by attributing the origin of new traits in a species to random genetic processes of mutation and sexual recombination, with the survivability of species with the new traits subject to natural selection. This combination of random mutation and natural selection is often referred to as Neodarwinism.

Joiner, David; The Shodor Education Foundation, Inc.

31

Firsthand Nature  

NSDL National Science Digital Library

It's no secret that many school programs don't give children enough opportunity to explore the natural world--i.e., to "mess about" and to have firsthand experience with nature and animals. Not so at the Muscota New School in New York City! This innovative public elementary school actively promotes inquiry-based learning and encourages teachers to use creative methods in the classroom to help children study the natural world around them. In this article, we share the experience of a teacher and her students over the course of two years (kindergarten and first grade) as they explored nature through direct observation of animals in the classroom, child-centered inquiry science, and school-sponsored field trips. As the years progressed, so did students' learning. Not only did students develop scientific literacy and communication skills, they also deepened their understanding of their environment.

Weiss, Francesca M.; Gostev, Moses

2007-04-01

32

Nature's software  

E-print Network

I bring forward some arguments to support the thesis that nature is fundamentally discrete, and present my own thoughts about the direction in which one could look for a possible, consistent "theory of everything" describing gravitation and quantum particles.

Daniel Canarutto

2014-04-20

33

Natural Cycle  

NSDL National Science Digital Library

In this short video from ClimateCentral, host Jessica Harrop explains what evidence scientists have for claiming that recent global warming is caused by humans and is not just part of a natural cycle.

Central, Climate

34

Natural Hazards  

NSDL National Science Digital Library

NASA's Earth Observatory Web site's newest addition, Natural Hazards, is a continually updated resource of remarkable photography taken from the satellite MODIS (Moderate-resolution Imaging Spectroradiometer) of visible natural disasters around the globe of things such as the thick cloud of pollution currently over India and the dozen ravaging bush fires in Australia. Each page contains a high-resolution image of the event, a description of what is taking place, and links to any related images.

2002-01-01

35

Cosmetic benefits of natural ingredients.  

PubMed

Photoaging is a leading concern for patients and many of these patients will express a desire to utilize natural ingredients as treatment. Mushrooms, feverfew, green tea, licorice, olive oil, soy, and coffee berry have been shown to have antioxidant properties and may play a role in the treatment and prevention of photoaging. In this manuscript, the most recent select basic science and clinical studies examining the mechanisms and efficacy of these ingredients will be discussed.

<em>J Drugs Dermatolem>. 2014;13(9):1021-1025. PMID:25226001

Bowe, Whitney P; Pugliese, Silvina

2014-09-01

36

Nature Walk  

NSDL National Science Digital Library

In this activity, learners take an indoor nature walk and discover various objects that have been brought in from the outdoor environment. In preparation for the activity, an educator places natural and man-made items around a room for learners to discover. Learners examine what they find and make notes about what they see and smell, how they (the learners) feel, and what each item looks like (including sketches). Then the group addresses the topic of "Leave No Trace" as it applies to a real nature walk. This would be a great activity before a field trip to a park, arboretum, or other outdoor environment, and can be done with one learner, a class, or even a large group at a family science event.

National 4-H Council

2009-01-01

37

Structure of Matter, Forces, EM Waves, Spectroscopy, Doppler Effect  

NSDL National Science Digital Library

These supplemental class notes cover the basic properties of matter, the nature of forces, the electromagnetic spectrum, and how astronomers exploit the properties of the EM spectrum to deduce the physical nature of distant objects.

O'Connell, Robert

2005-06-28

38

Resultados do desenvolvimento de um propulsor à plasma no Brasil  

NASA Astrophysics Data System (ADS)

Uma das partes mais importantes de um satélite é o controle de atitude do mesmo. E se tratando de um satélite científico, a atenção para este sistema deve ser redobrada. Uma possibilidade atraente para executar esta tarefa é a propulsão elétrica. Aqui, mostraremos resultados obtidos pelo propulsor à plasma PHALL-01, desenvolvido na Universidade de Brasília entre 2000 e 2003. Este é derivado do propulsor russo SPT-100 (Stationary Plasma Thruster), mas com o emprego inovador de um arranjo de imãs permanentes como fonte do campo magnético, este último o agente da aceleração do plasma. Esta alteração foi motivada pelo objetivo de que o mesmo operasse com o mínimo de potência elétrica. A partir da formulação teórica do mecanismo de aceleração, tendo como base as equações da magnetohidrodinâmica, pode-se obter vínculos sob os quais o propulsor pudesse ser construído. O mais forte destes é o que dita a topologia do campo magnético. Sendo assim, foram realizadas simulações computacionais, que definiram a geometria do propulsor. Após construído, este foi diagnosticado usando-se sondas de Langmuir e analisadores de energia. Como resultados, obtivemos a distribuição espacial da temperatura, densidade e potencial do plasma, bem como a distribuição angular do feixe produzido pelo mesmo em vários regimes de operação. O espectro de energia do feixe de plasma também foi medido, indicando íons de até 560eV. Combinando estes resultados, calculou-se o empuxo do propulsor: 84mN; e o impulso específico: 1083s. Estes demonstram que o mesmo estará qualificado, num futuro próximo, para o emprego no controle de atitude de satélites científicos, ou até mesmo como parte do conjunto propulsor primário, responsáveis pela transferência de órbitas.

Ferreira, I. S.; Ferreira, J. L.

2003-08-01

39

Natural games  

E-print Network

Behavior in the context of game theory is described as a natural process that follows the 2nd law of thermodynamics. The rate of entropy increase as the payoff function is derived from statistical physics of open systems. The thermodynamic formalism relates everything in terms of energy and describes various ways to consume free energy. This allows us to associate game theoretical models of behavior to physical reality. Ultimately behavior is viewed as a physical process where flows of energy naturally select ways to consume free energy as soon as possible. This natural process is, according to the profound thermodynamic principle, equivalent to entropy increase in the least time. However, the physical portrayal of behavior does not imply determinism. On the contrary, evolutionary equation for open systems reveals that when there are three or more degrees of freedom for behavior, the course of a game is inherently unpredictable in detail because each move affects motives of moves in the future. Eventually, when no moves are found to consume more free energy, the extensive-form game has arrived at a solution concept that satisfies the minimax theorem. The equilibrium is Lyapunov-stable against variation in behavior within strategies but will be perturbed by a new strategy that will draw even more surrounding resources to the game. Entropy as the payoff function also clarifies motives of collaboration and subjective nature of decision making.

Jani Anttila; Arto Annila

2011-03-05

40

Nature's Palette  

ERIC Educational Resources Information Center

Flower petals, acorn hats, exoskeletons of beetles, and lichens are just a few of the objects students may find in a surprising array of vivid colors. These tiny examples from nature's palette can be discovered in a school yard, a park, or even along the edges of a paved sidewalk...it simply takes careful observation! This article describes a…

McBride, Brooke B.; Brewer, Carol A.

2010-01-01

41

Natural friedelanes.  

PubMed

This review covers the occurrence and biological activities of all natural friedelane triterpenoids found between 1977 and March 2011. The biogeneses of dimeric friedelanes and several rearranged friedelanes are discussed. The pharmacological properties of representative compounds, including celastrol and correolide, have also been compiled, on the basis of 344 references. PMID:23939791

Shan, Wei-Guang; Zhang, Li-Wen; Xiang, Jia-Gui; Zhan, Zha-Jun

2013-08-01

42

Nature Milestones  

NSDL National Science Digital Library

What were the most important advances in cutaneous biology of the past 100 years? The Nature Milestones website provides a detailed answer to that question, along with similar responses regarding light microscopy, cancer, and gene expression. All told there are ten special features on the site, and each feature includes an interactive timeline, scientific commentaries, and a selection of articles from Nature magazine and other peer-reviewed publications. Additionally, each feature includes a list of academic advisors, sponsors, and links to external resources on the subject. Visitors may wish to use these resources in the classroom setting, as they provide basic and advanced materials that can be used by a number of introductory courses. Finally, a number of the materials are also available in the pdf format for easy printing.

43

Nature Stories  

NSDL National Science Digital Library

What do passenger pigeons, coal mining in Kentucky and cattle ranching have in common? Not a great deal, perhaps, but they are all grist for the mill of the Nature Conservancy's most excellent "Nature Stories" podcast series. The series started in February 2006, and currently there are well over 100 podcasts available on the site. Visitors can browse through them at their leisure, sign up for the podcast feed via iTunes, and also listen in right here. There's much to recommend here, but visitors might want to start by listening to the "Son of a Coalminer" podcast about a father and son coalmining team and "Wild Crafting", which profiles a couple who earn their living by foraging mushrooms and other items in Vermont.

44

Natural Inflation  

E-print Network

A pseudo-Nambu-Goldstone boson, with a potential of the form $ V(\\phi) = \\Lambda^4 [1 + \\cos(\\phi/f)]$, can naturally give rise to an epoch of inflation in the early universe (Freese, Frieman, and Olinto 1990). The potential is naturally flat (as required by microwave background limits on the amplitude of density fluctuations), without any fine-tuning. Successful inflation can be achieved if $f \\sim m_{pl}$ and $\\Lambda \\sim m_{GUT}$. Such mass scales arise in particle physics models with a large gauge group that becomes strongly interacting at a scale $\\sim \\Lambda$, {\\it e.g.,} as can happen in the hidden sector of superstring theories. The density fluctuation spectrum can be non-scale-invariant, with more power on large length scales (Adams, Bond, Freese, Frieman, and Olinto 1993). This enhanced power on large scales may be useful to explain the otherwise puzzling large-scale clustering of galaxies and clusters and their flows. Natural inflation differs from other models with extra large-scale power in that the contribution of the tensor modes to microwave background fluctuations is negligible; this difference should serve as a testable feature of the model.

Katherine Freese

1993-10-06

45

Desenvolvimento mental e motor aos 24 meses de crianças nascidas a termo com baixo peso  

Microsoft Academic Search

RESUMO - Este estudo teve como objetivo comparar o desenvolvimento aos 24 meses de 152 crianças nascidas a termo, com baixo peso (< 2500g) e peso adequado (3000 a 3499g), pareadas numa proporção de 1:1 por sexo e idade. O desenvolviment o mental e motor foram avaliados pela escala de Bayley. Estudaram-se ainda algumas variáveis ambientais, como as condições sócio-econômicas

Sophie Helena Eickmann; Pedro Israel Cabral de Lira; Marilia de Carvalho Lima

2002-01-01

46

Mimicking Nature  

E-print Network

tx H2O | pg. 14 Story by Kathy Wythe tx H2O | pg. 15 In the 1980s, a group of scientists in a smallresearch building in Temple, Texas, began ajourney to mimic how watersheds work. Today, a major product of their efforts?SWAT?is used throughout... into lakes and rivers, and the impact different water management decisions could have. ?We?re trying to mimic nature,? said Dr. Jeff Arnold, research leader and agricultural engineer for the Grassland Soil and Water Research Laboratory in Temple, part...

Wythe, Kathy

2007-01-01

47

Natural Selection  

NSDL National Science Digital Library

Learners simulate the process of natural selection using a variety of beans and a bowl with a hole cut into it. The variety of beans represents the variation in a population of microbes, and the bowl with a hole represents an antibiotic or some other selective pressure on the population. Only the beans that survive (don't fall through the hole) are allowed to reproduce for the next generation. Learners record and plot the number of each kind of bean through multiple generations. This activity also addresses the process of scientific investigation as learners are encouraged to design their own method of experimentation, make a hypothesis, record data, and share their results.

Thiel-Cobbey, Heather

2012-01-01

48

Natural Selection  

NSDL National Science Digital Library

A common criticism of natural selection is: How can it produce novel complex useful structures by pure random chance? Darwin argued that selection is not a random process, and furthermore, it is cumulative. This lesson provides a way for students to actually compare the cumulative non-random selection of Darwin with the non-cumulative version so often erroneously implied. Students attempt to produce a full sequence of 13 cards of one suit (ace - to king). This must be done by shuffling the suit of cards for each round, then checking the cards. Half the teams must look for the full sequence each time, and repeat the process until this is accomplished. The other teams start to build their sequence by pulling the ace when it first appears as the top card, then adding to the stack whenever the next card for the sequence is shuffled to the top. Discussion reveals how the second method mimics Darwinian natural selection, while the first does not.

Heim, Werner

2007-12-12

49

Natural inflation  

SciTech Connect

A pseduo-Nambu-Goldstone boson, with a potential of the form V({phi}) = {Lambda}{sup 4}(1 {plus minus} cos({phi}/f)), can naturally give rise to an epoch of inflation in the early universe. Successful inflation can be achieved if f {approximately} m{sub pl} and {Lambda} {approximately} m{sub GUT}. Such mass scales arise in particle physics models with a gauge group that becomes strongly interacting a the GUT scale, e.g., as is expected to happen in the hidden sector of superstring theories. The density fluctuation spectrum is a non-scale-invariant power law, with extra power on large scales. 12 refs., 3 figs.

Frieman, J.A.

1991-02-01

50

Natural Strain  

NASA Technical Reports Server (NTRS)

The purpose of this paper is to present a consistent and thorough development of the strain and strain-rate measures affiliated with Hencky. Natural measures for strain and strain-rate, as I refer to them, are first expressed in terms of of the fundamental body-metric tensors of Lodge. These strain and strain-rate measures are mixed tensor fields. They are mapped from the body to space in both the Eulerian and Lagrangian configurations, and then transformed from general to Cartesian fields. There they are compared with the various strain and strain-rate measures found in the literature. A simple Cartesian description for Hencky strain-rate in the Lagrangian state is obtained.

Freed, Alan D.

1995-01-01

51

Natural games  

NASA Astrophysics Data System (ADS)

A course of a game is formulated as a physical process that will consume free energy in the least time. Accordingly, the rate of entropy increase is the payoff function that will subsume all forms of free energy that motivate diverse decisions. Also other concepts of game theory are related to their profound physical counterparts. When the physical portrayal of behavior is mathematically analyzed, the course of a game is found to be inherently unpredictable because each move affects motives in the future. Despite the non-holonomic character of the natural process, the objective of consuming free energy in the least time will direct an extensive-form game toward a Lyapunov-stable point that satisfies the minimax theorem.

Anttila, Jani; Annila, Arto

2011-10-01

52

Desenvolvimento de substratos orgânicos, com base na vermicompostagem, para produção de mudas de hortaliças em cultivo protegido, 2011.  

E-print Network

??Organic substrates were developed, using renewable and locally available sources, for vegetable transplant production in expanded polyestirene trays under protected environment. Vermicompost, coming from cow… (more)

Eva Adriana Gonçalves de Oliveira

2011-01-01

53

DESENVOLVIMENTO E IMPLEMENTAÇÃO DE UMA BASE COMPUTACIONAL ORIENTADA A OBJETOS PARA APLICAÇÕES EM SISTEMAS DE ENERGIA ELÉTRICA  

Microsoft Academic Search

This paper describes the application of the Object-Oriented Programming (OOP) on the modeling of Power Systems. It is intend to develop a computational object-oriented base to represent, in an efficient way, the physical component s of a Power System and their methodologies of analysis and synthesis. The generalization level of the classes' structure allows fut ure specializations, on the side

MARCELO N. AGOSTINI; ILDEMAR C. DECKER; AGUINALDO S. E SILVA

2000-01-01

54

NATURE: Kalahari  

NSDL National Science Digital Library

This website is the Web companion to the two-part NATURE documentary on the Kalahari Desert, which aired on PBS during fall 2003. The first episode, Kalahari: The Great Thirstland, explores the intense extremes of the Kalahari landscape, where wildlife "struggle for survival on the African plains." The site offers a number of Web-only extras, including a species guide in the form of animal trading cards, a slide show showing seasonal change in the Kalahari, and more. Episode Two, Kalahari: The Flooded Desert, explores the desert wetland of the Okavango Delta, "one of the most unusual ecosystems in one of the harshest regions in the world." The Web companion for this episode can by accessed through the first website, and it's here that teachers will find an interdisciplinary lesson plan designed for grades 3-5. The lesson focuses on the rich diversity of Kalahari wildlife, and uses a number of interactive activities from other websites (links provided). Web-only features for this episode include an interactive journey through the Okavango Delta, a behind-the-scenes interview with the film's director, and of course, related links. [RS

2003-01-01

55

Três momentos da urbanização turística: estado, mercado e desenvolvimento regional no Nordeste brasileiro, 1997-2007  

Microsoft Academic Search

As atividades ligadas ao setor “imobiliário – turístico” passaram, nos dez últimos anos, a desempenhar relevância não apenas econômica, mas principalmente em relação aos impactos territoriais, sociais e ambientais nas áreas litorâneas do Nordeste brasileiro. Este período pode ser dividido em três momentos específicos: um primeiro relativo ao papel das políticas públicas na implantação de uma infra-estrutura urbana voltada à

Alexsandro Ferreira Cardoso da Silva; Angela Lúcia de Araújo Ferreira

2008-01-01

56

Regulation of natural monopolies  

E-print Network

This chapter provides a comprehensive overview of the theoretical and empirical literature on the regulation of natural monopolies. It covers alternative definitions of natural monopoly, regulatory goals, alternative ...

Joskow, Paul L.

2005-01-01

57

REL ATRIO DE DESENVOLVIMENTO HUMANO 2007/2008 201 1 Diamond 2005.  

E-print Network

et al. 2005. 45 IPCC 2007d. 46 Hansen et al. 2007; Pritchard and Vaughn 2007. 47 Hansen 2007a, 2007b2e (IPCC 2007c). 62 Stern 2006. 63 Barker and Jenkins 2007. 64 Por exemplo, o Relatório Stern CO2 e. 65 Cálculos do GRDH baseados no custo anual indicado em percentagem do PIB em Barker e Jenkins

58

CNMP, CSP, EMS and Writing It Down  

E-print Network

by farmers, leading to... · Increasing importance of "writing it down" #12;Examples.. · NMP, CNMP · PMPOp & plan for more · III - meet all natural resource concerns #12;NMP & CNMP · NMP in WI rules; CNMP and erosion #12;EMS is HQ · CSP, NMP, PMP, CNMP alphabet soup · Are components of an Environmental Management

Balser, Teri C.

59

Research Highlights Nature Nanotechnology  

E-print Network

© 2009 APS Research Highlights Nature Nanotechnology Published online: 17 July 2009 | doi:10 perfect fluid. Phys. Rev. Lett. 103, 025301 (2009). | Article |1. Nature Nanotechnology ISSN 1748 : Nature Nanotechnology http://www.nature.com/nnano/reshigh/2009/0709/full/nnano.2009.222.html 1 of 1 18

Müller, Markus

60

A Natural Love of Natural Products  

PubMed Central

Recent research on the chemistry of natural products from the author’s group that led to the receipt of the ACS Ernest Guenther Award in the Chemistry of Natural Products is reviewed. REDOR NMR and synthetic studies established the T-taxol conformation as the bioactive tubulin-binding conformation, and these results were confirmed by the synthesis of compounds which clearly owed their activity or lack of activity to whether or not they could adopt the T-taxol conformation. Similar studies with the epothilones suggest that the current tubulin-binding model needs to be modified. Examples of natural products discovery and biodiversity conservation in Suriname and Madagascar are also presented, and it is concluded that natural products chemistry will continue to make significant contributions to drug discovery. PMID:18459734

2008-01-01

61

Pennsylvania's Natural Gas Future  

E-print Network

, President #12;UGI Propane Gas & Electric Domestic International Regulated Utilities Midstream & Marketing development (safety/regulation) · Aging and limited distribution infrastructure #12;Conclusion · Gas1 Pennsylvania's Natural Gas Future Penn State Natural Gas Utilization Workshop Bradley Hall

Lee, Dongwon

62

Nature of War Theory.  

National Technical Information Service (NTIS)

Today s advances in evolutionary biology are unifying competing theories of natural selection and serve as a timely call for a similar unification of competing theories of war. This paper explores the relationship between war and natural selection by firs...

P. B. Olsen

2011-01-01

63

Natural gas annual 1996  

SciTech Connect

This document provides information on the supply and disposition of natural gas to a wide audience. The 1996 data are presented in a sequence that follows natural gas from it`s production to it`s end use.

NONE

1997-09-01

64

Nature/Culture/Seawater  

E-print Network

This essay considers seawater as a substance and symbol in anthropological and social theory. Seawater has occupied an ambiguous place with respect to anthropological categories of nature and culture. Seawater as nature ...

Helmreich, Stefan

65

Natural Gas Monthly  

EIA Publications

Highlights activities, events, and analyses associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer related activities and underground storage data are also reported.

2014-01-01

66

Perceptions of the natural  

E-print Network

This thesis takes on the difficulty of defining a clear line that connects and separates natural and artificial in a contemporary landscape. It is a proposal for a park that addresses the image and understanding of nature. ...

Filipovic, Renata, 1973-

2005-01-01

67

Natural gas annual 1995  

SciTech Connect

The Natural Gas Annual provides information on the supply and disposition of natural gas to a wide audience including industry, consumers, Federal and State agencies, and educational institutions. The 1995 data are presented in a sequence that follows natural gas (including supplemental supplies) from its production to its end use. This is followed by tables summarizing natural gas supply and disposition from 1991 to 1995 for each Census Division and each State. Annual historical data are shown at the national level.

NONE

1996-11-01

68

Natural-gas liquids  

Microsoft Academic Search

Casinghead gasoline or natural gasoline, now more suitably known as natural-gas liquids (NGL), was a nuisance when first found, but was developed into a major and profitable commodity. This part of the petroleum industry began at about the turn of the century, and more than 60 yr later the petroleum industry recovers approx. one million bbl of natural-gas liquids a

W. B. Blackstock; G. W. McCullough; R. C. McCutchan

1968-01-01

69

Drawing From Nature  

NSDL National Science Digital Library

In this activity, learners draw natural objects to explore the details, differences, and similarities of natural objects. Learners investigate plants, seeds, pinecones, and other items from nature at two stations. At station one, learners trace plants on plexiglass. At station two, learners observe small items through magnifying glasses and draw what they see.

Museum, Chicago C.

2008-01-01

70

Learning in Nature  

ERIC Educational Resources Information Center

This paper traces the evolution of a theory of learning in nature in order to explain how people learn in natural settings. The intellectual roots of the theory in informal learning, cognition, affective development, experiential and meaningful learning are described and the synthesis into a comprehensive theory of learning in nature are…

Brody, Michael

2005-01-01

71

Nature and the Personality.  

ERIC Educational Resources Information Center

Outdoor education is an important supplement to a general scientific education because natural things can best be understood out-of-doors through direct experience. An event seen in nature enriches our frames of reference and increases our perception of its relationship to other natural objects and events. (CM)

Partridge, Ernest

1980-01-01

72

PLANNING A NATURE CENTER.  

ERIC Educational Resources Information Center

THIS BULLETIN IS PRODUCED BY THE NATURE CENTERS DIVISION, NATIONAL AUDUBON SOCIETY TO PROVIDE PROFESSIONAL GUIDANCE AND TECHNICAL KNOW-HOW IN THE DEVELOPMENT OF COMMUNITY NATURE AND CONSERVATION CENTERS. THE TOPICS COVERED ARE--(1) PURPOSE AND VALUE OF A NATURE AND CONSERVATION CENTER, (2) INITIAL CONSIDERATIONS SUCH AS COMMUNITY READINESS, LAND…

ASHBAUGH, BYRON L.

73

Natural Resource Extension Professionals  

E-print Network

3rd Natural Resource Extension Professionals Conference Revolutionizing or Evolutionizing Extension of University of Florida, IFAS Communication Services Center for Natural Resources #12;#12;i Welcome to the 3rd Natural Resource Extension Professionals Conference! The program committee has prepared an exciting

Watson, Craig A.

74

VETOR NATURAL DA DIROFILARIA IMMITIS (NEMATODA) EM MOSSORÓ-RN  

Microsoft Academic Search

Dirofilariasis is an emergent zoonosis caused by the heartworm Dirofilaria immitis, having Culicidea mosquitoes as vectors of great epidemiological importance. The present work aimed to identify the fauna of Culicidea mosquitoes and the species responsible for the transmission of D. immitis in Mossoró-RN. Mosquitoes were captured in peridomiciliar environment using a human being as attractive, during the period of August

PAULO MOISÉS LIMA

75

NATURAL GENETIC ENGINEERING AND NATURAL GENOME EDITING Learning from Bacteria about Natural  

E-print Network

NATURAL GENETIC ENGINEERING AND NATURAL GENOME EDITING Learning from Bacteria about Natural, and in some Natural Genetic Engineering and Natural Genome Editing: Ann. N.Y. Acad. Sci. 1178: 78­90 (2009

Jacob, Eshel Ben

76

EM International. Volume 1  

SciTech Connect

It is the intent of EM International to describe the Office of Environmental Restoration and Waste Management`s (EM`s) various roles and responsibilities within the international community. Cooperative agreements and programs, descriptions of projects and technologies, and synopses of visits to international sites are all highlighted in this semiannual journal. Focus on EM programs in this issue is on international collaboration in vitrification projects. Technology highlights covers: in situ sealing for contaminated sites; and remote sensors for toxic pollutants. Section on profiles of countries includes: Arctic contamination by the former Soviet Union, and EM activities with Germany--cooperative arrangements.

Not Available

1993-07-01

77

Healing relationships with nature.  

PubMed

Our health is intimately connected to the health of our environment. The contemporary world view which sees a radical distinction between humans as subjects and world as object can obscure our recognition of how much we rely on nature for health and survival. Indigenous traditions and contemporary scholars remind us that we live in a universe in which all things are connected, and in which nature continues to offer its gifts in co-creative partnership for the health and wellbeing of all. Living in awareness of our relationship with nature enables us to open more to the experience of nature's nurturing. Many complementary therapies derive from ancient practices that involve nature in healing partnership. As nurses and midwives we must learn to expand our boundaries to encompass the many ways that nature partners with us for healing. PMID:11033652

Burkhardt, M A

2000-02-01

78

Acknowledgements NATURE CURE AND NATURAL METHODS  

E-print Network

Principles And Practice Of Nature Cure1. Fasting - The Master Remedy2. Therapeutic Baths3. Curative Powers Of Food Combining15. Health Promotion The Vegetarian Way16. Importance Of Dietary Fibre17. Lecithin. Obesity67. Peptic Ulcer68. Piles69. Premature Greying Of Hair70. Prostate Disorders71. Psoriasis72

Sanyal, Sugata

79

Nature, Education, and the Natural Woman  

ERIC Educational Resources Information Center

An examination of 18th and 19th century naturalistic educational theory reveals that appeals to nature confirmed and strengthened contemporary attitudes and practices restricting woman's access to knowledge and her freedom to make decisions and to act. (Author/DW)

Miller, Peter J.

1974-01-01

80

NATURE.COM/NATURE 2 February 2012  

E-print Network

32 MICROBIOLOGY RESISTANCE FIGHTERS The rocky road to an MRSA vaccine PAGE23 HIDDEN STRENGTHNonlinear failure of spider silk is secret of its success PAGE72 THE INTERNATIONAL WEEKLY JOURNAL OF SCIENCE #12;LETTER doi:10.1038/nature10739 Nonlinear material behaviour of spider silk yields robust webs Steven W

Buehler, Markus J.

81

A natural monopoly in natural gas transmission  

Microsoft Academic Search

In this article, we test for subadditivity in the cost structure associated with transporting natural gas by Trans-Canada Pipelines Ltd. and measure for possible cost savings from increased competition that could be realized by removing the monopoly status granted by the National Energy Board. In measuring subadditivity, we apply both the Baumol et al. (Contestable Markets and the Theory of

D. V. Gordon; K. Gunsch; C. V. Pawluk

2003-01-01

82

Natural gas liquefaction processes  

NASA Astrophysics Data System (ADS)

The liquefaction of natural gas using a mixed refrigerant process was first proposed by Kleemenko in 1959 [50]. Mixed refrigerant processes were subsequently adopted for the commercial liquefaction of natural gas nearly 40 years ago. Over 95% of the base-load LNG plants operate on mixed refrigerant processes, with the remaining few operating on conventional cascade processes. The enthalpy of natural gas varies nonlinearly with temperature (at constant pressure), with points of inflection on the enthalpy temperature curve.

Venkatarathnam, Gadhiraju

83

Natural vacuum electronics  

NASA Technical Reports Server (NTRS)

The ambient natural vacuum of space is proposed as a basis for electron valves. Each valve is an electron controlling structure similiar to a vacuum tube that is operated without a vacuum sustaining envelope. The natural vacuum electron valves discussed offer a viable substitute for solid state devices. The natural vacuum valve is highly resistant to ionizing radiation, system generated electromagnetic pulse, current transients, and direct exposure to space conditions.

Leggett, Nickolaus

1990-01-01

84

A Natural Selection  

NSDL National Science Digital Library

The high school science laboratory provides a natural environment for students to learn through scientist-teacher partnerships. A dynamic learning community, authentic inquiry, a deeper understanding of the nature of science, and learning about scientific careers are all benefits of scientist-teacher partnerships. This article focuses on the benefits of partnerships while describing how one specific partnership team developed a natural selection laboratory to integrate with a high school biology curriculum.

Nielsen, Katherine M.; Siegel, Marcelle A.; Mlynarczyk-Evans, Susanna; Brenner, Tamara J.

2005-10-01

85

Paradoxical Nature In Cities .  

E-print Network

??Literature supports an inherent human connection with nature. This relationship has numerous documented health benefits to humans. For generations, land planning professionals have been responsible… (more)

[No author

2012-01-01

86

Warner College of Natural Resources Warner College of Natural  

E-print Network

in the conservation and sustainable management of natural and cultural resources on Department of Defense landsWarner College of Natural Resources Warner College of Natural Resources Office in Natural Resources, and Conservation Biology Forestry Geology Natural Resource Recreation and Tourism Natural Resources Management

Collett Jr., Jeffrey L.

87

Liquefied natural gas  

Microsoft Academic Search

Countries such as Abu Dhabi, Algeria, Indonesia, Iran, Libya, Nigeria, Trinidat, and the Soviet Union have entered or are planning to enter the rapidly growing market for imported natural gas in Japan, the U.S., and Western Europe. The most economic method to transport natural gas across great ocean distances is to ship it in liquid form. Prior to 1977 the

1978-01-01

88

Engineering Nature's Nanotech  

Microsoft Academic Search

In this paper, the author discussed the possibilities and the advantages of natural nanotechnology over synthethic materials. Proteins for example, as nature's nanomachines is easily accessible and does not require fabrication. nanotechnology is set to open up numerous doors for the future, some of which we will likely not even be able to foresee today. As we begin to venture

Christopher M. Frenz

2008-01-01

89

Natural Hazards Review  

NSDL National Science Digital Library

The Natural Hazards Review is accessible from the American Society of Civil Engineers (ASCE). "Civil engineers, geologists, scientists and researchers involved in various aspects of construction will find the broad scope of the journal helpful for developing design strategies to mitigate natural hazards." ASCE non-members are required to complete an online form to access the articles.

2004-01-01

90

CONNECTICUT NATURAL DIVERSITY DATABASE  

EPA Science Inventory

This is a statewide datalayer at 1:24,000 scale of general areas of concern with regards to state and federally listed Endangered, Threatened, and Special Concern species and significant natural communities. Locations of species and natural communities are based on data collecte...

91

Is That Natural?  

NSDL National Science Digital Library

Students will brainstorm ways that they use â and waste â natural resources. Also, they will respond to some facts about population growth and how people use petroleum. Lastly, students will consider the different ways that engineers interact with and use our natural resources.

Integrated Teaching And Learning Program

92

Nature and Embodied Education  

Microsoft Academic Search

An embodied educational environment is one that is in tune with the intimate connection of the body and the mind. This article explores the importance of nature in creating such environments. The main theme is that emerging multidisciplinary thought on the embodied mind can provide new ways to understand the positive role of nature in children's education. New pers- pectives

Kevin Rathunde

93

A Natural Policy Gradient  

Microsoft Academic Search

We provide a natural gradient method that represents the steepestdescent direction based on the underlying structure of the parameterspace. Although gradient methods cannot make large changesin the values of the parameters, we show that the natural gradientis moving toward choosing a greedy optimal action rather thanjust a better action. These greedy optimal actions are those thatwould be chosen under one

Sham Kakade

2001-01-01

94

Natural Science Centers: Directory.  

ERIC Educational Resources Information Center

A nature center is defined as an organized and permanent nonprofit institution which is essentially educational, scientific, and cultural in purpose with professional staff, and open to the public on some regular schedule. A nature center manages and interprets its lands, native plants and animals and facilities to promote an understanding of…

Natural Science for Youth Foundation, Roswell, GA.

95

Epidemics after Natural Disasters  

Microsoft Academic Search

The relationship between natural disasters and com- municable diseases is frequently misconstrued. The risk for outbreaks is often presumed to be very high in the chaos that follows natural disasters, a fear likely derived from a perceived association between dead bodies and epidem- ics. However, the risk factors for outbreaks after disasters are associated primarily with population displacement. The availability

John T. Watson; Michelle Gayer; Maire A. Connolly

2007-01-01

96

Collaborative Solutions for Natural  

E-print Network

management and collaborative leadership. For more information about NRLI contact: Bruce L. Delaney PO BoxCollaborative Solutions for Natural Resource Challenges NRLI PROJECT TEAM University of Florida of a trained network of professionals prepared to effectively address natural resources issues through conflict

Jawitz, James W.

97

Nature as Second Nature: Plasticity and Habit  

Microsoft Academic Search

I will begin where Stephen Erickson ends “Reflections on Secular Foundationalism and Our Human Future,” with the grape (Erickson,\\u000a 2009). His speculations concerning the moral issues that will likely arise in light of the development of new biotechnologies\\u000a draws into question the very possibility of clearly dividing human nature from cultural artifice. They draw into question\\u000a the possibility of distinguishing

Peter Wake

98

Código para imageamento indireto de estrelas em sistemas binarios: simulação de variações elipsoidais e do perfil das linhas  

NASA Astrophysics Data System (ADS)

As estrelas secundárias em variáveis cataclí smicas (VCs) e binárias-x de baixa massa (BXBMs) são cruciais para o entendimento da origem, evolução e comportamento destas binárias interagentes. Elas são estrelas magneticamente ativas submetidas a condições ambientais extremas [e.g., estão muito próximas de uma fonte quente e irradiante; têm rotação extremamente rápida e forma distorcida; estão perdendo massa a taxas de 10-8-10-10 M¤/ano] que contribuem para que suas propriedades sejam distintas das de estrelas de mesma massa na seqüência principal. Por outro lado, o padrão de irradiação na face da secundária fornece informação sobre a geometria das estruturas de acréscimo em torno da estrela primária. Assim, a obtenção de imagens da superfície destas estrelas é de grande interesse astrofísico. A Tomografia Roche usa as variações no perfil das linhas de emissão/absorção da estrela secundária em função da fase orbital para mapear a distribuição de brilho em sua superfície. Neste trabalho apresentamos os resultados iniciais do desenvolvimento de um programa para o mapeamento da distribuição de brilho na superfí cie das estrelas secundárias em VCs e BXBMs com técnicas de astro-tomografia. Presentemente temos em operação um código que simula as variações no perfil das linhas em conseqüência de efeito Doppler resultante da combinação de rotação e translação de uma estrela em forma de lobo de Roche em torno do centro de massa da binária, em função da distribuição de brilho na superfície desta estrela. O código igualmente produz a curva de luz resultante das variações de aspecto da estrela em função da fase orbital (variações elipsoidais).

Souza, T. R.; Baptista, R.

2003-08-01

99

DESENVOLVIMENTO DO RABANETE RAPHANUS SATIVUS L. SUBMETIDO A DIFERENTES PULVERIZAÇÕES COM SOLUÇÕES HOMEOPÁTICAS  

Microsoft Academic Search

The rational agriculture focus is beyond natural resources preservation of our planet, the alternative products use which minimize decades of impacts created by mankind. The agrocology, agriculture model which its philosophy concepts a clean, healthy agriculture is still in need of researchers to solve problems that deal with several agricultures. Less toxic products based on non-polluting substances would be accepted

Fabrizio Carbone Romano; Maria do Carmo Arenales; Ricieri Zerbatto; Juliana Neves; Sueli Reis Bonturi; Celso Camilo Ribeiro; Marcos Felipe Poptiz; Maria do Carmo

100

Natural resources - constitutional law  

SciTech Connect

New England Power Co. reaffirms Congressional authority under the commerce clause to regulate interstate trade in natural resources. The Supreme Court has consistently held that states cannot restrict to their own citizens the benefits of natural resources located within state boundaries. As a result, a state's control over such resources is largely limited to taxing their generation or extraction. New England Power Co. reiterates the Court's adamant stand against economic protectionism, especially when natural resources are concerned. Secondarily, this case establishes that Congressional consent to otherwise impermissible state regulation of interstate commerce must be express; the Court will not infer such consent. 29 references.

Jorgensen, C.L.

1983-10-01

101

Is image steganography natural?  

PubMed

Steganography is the art of secret communication. Its purpose is to hide the presence of information, using, for example, images as covers. We experimentally investigate if stego-images, bearing a secret message, are statistically "natural." For this purpose, we use recent results on the statistics of natural images and investigate the effect of some popular steganography techniques. We found that these fundamental statistics of natural images are, in fact, generally altered by the hidden "nonnatural" information. Frequently, the change is consistently biased in a given direction. However, for the class of natural images considered, the change generally falls within the intrinsic variability of the statistics, and, thus, does not allow for reliable detection, unless knowledge of the data hiding process is taken into account. In the latter case, significant levels of detection are demonstrated. PMID:16370457

Martín, Alvaro; Sapiro, Guillermo; Seroussi, Gadiel

2005-12-01

102

Some Natural Pesticide Alternatives  

MedlinePLUS

... Pest Management web site. http://www.epa.gov/pesticides/factsheets/ipm.htm City of Tucson/ Pima County ... Grant Road Printed on recycled paper. SOME NATURAL PESTICIDE ALTERNATIVES For the safety of you, your family ...

103

Natural Hazards Term Project  

NSDL National Science Digital Library

Students apply the concepts learned in the class by preparing two (2) term projects discussing two natural hazards and how they impact the area where the student lives (or an area the student might like to live in).

Phillips, Michael

104

Natural drinking strategies  

E-print Network

We examine the fluid mechanics of drinking in nature. We classify the drinking strategies of a broad range of creatures according to the principal forces involved, and present physical pictures for each style. Simple scaling ...

Kim, Wonjung

105

On cosmic natural selection  

E-print Network

The rate of black hole formation can be increased by increasing the value of the cosmological constant. This falsifies Smolin's conjecture that the values of all constants of nature are adjusted to maximize black hole production.

Alexander Vilenkin

2006-10-04

106

Automatic natural language parsing  

SciTech Connect

This collection of papers on automatic natural language parsing examines research and development in language processing over the past decade. It focuses on current trends toward a phrase structure grammar and deterministic parsing.

Sprack-Jones, K.; Wilks, Y.

1985-01-01

107

Optimizing Natural Fertility  

MedlinePLUS

... Patient Education Website of the American Society for Reproductive Medicine Optimizing Natural Fertility What can I do ... 2012 For more information on this and other reproductive health topics visit www.ReproductiveFacts.org AMERICAN SOCIETY ...

108

Nature limits filarial transmission  

PubMed Central

Lymphatic filariasis, caused by Wuchereria bancrofti, Brugia malayi and B. timori is a public health problem of considerable magnitude of the tropics and subtropics. Presently 1.3 billion people are at risk of lymphatic filariasis (LF) infection and about 120 million people are affected in 83 countries. In this context it is worth mentioning that 'nature' itself limits filarial transmission to a great extent in a number of ways such as by reducing vector populations, parasitic load and many other bearings. Possibilities to utilize these bearings of natural control of filariasis should be searched and if manipulations on nature, like indiscriminate urbanization and deforestation, creating sites favourable for the breeding of filarial vectors and unsanitary conditions, water pollution with organic matters etc., are reduced below the threshold level, we will be highly benefited. Understandings of the factors related to natural phenomena of control of filariasis narrated in this article may help to adopt effective control strategies. PMID:18500974

Chandra, Goutam

2008-01-01

109

Nature Picture Library  

NSDL National Science Digital Library

While a commercial enterprise, the Nature Picture Library offers viewers free online access to thousands of high-resolution photographs in its database. Containing fantastic shots of flora and fauna in settings of every variety, the Nature Picture Library is a great graphic resource for those in search of images of the natural world. Images can be purchased for direct downloads or can be stored online for free by registered users in lightboxes of their own design. The picture library allows registrants to create and store as many as fifty lightboxes for online consultation. A great way to see the world and all its creatures, the Nature Picture Library is sure to provoke awe, admiration, and devotion from users of every age.

2002-01-01

110

Natural flavor conservation  

SciTech Connect

It is shown that the fiats of Natural Flavor Conservation for an arbitrary U(1)-unbroken gauge theory require that all quarks of a given charge and helicity transform identically under the gauge group.

Rothman, A.C.; Kang, K.

1980-01-01

111

Natural Selection Lesson  

NSDL National Science Digital Library

The Natural Selection lesson uses a Monte Carlo model of spot size with variability between generations in an environment with predators to study how variation and environment can affect a species over time.

Joiner, David; The Shodor Education Foundation, Inc.

112

Immigration and Naturalization Statistics  

NSDL National Science Digital Library

The Immigration and Naturalizations Service Statistics site provides "comprehensive annual immigration statistics from 1994-1996, as well as state estimates of the United States' illegal alien resident and foreign-born populations."

Service., United S.

1997-01-01

113

Mutualistic relationships in nature  

NSDL National Science Digital Library

Many organisms depend on other organisms for survival. Mutualism is when two organisms have a relationship in nature and each benefits from the relationship. Pollination and lichens are the best examples of mutualism.

Katie Hale (California State University, Fullerton;Student, Biological Science)

2006-12-30

114

Natural Aggregate: A Primer  

NSDL National Science Digital Library

This slide show provides an introduction to the production and uses of natural aggregate. Topics include some definitions, uses, and demand for aggregate. There is also information on its occurrence, mining, and production.

Langer, Bill

115

Make a Nature Trail  

ERIC Educational Resources Information Center

Discusses the planning, construction, use, and maintenance of a nature trail. Ideal for demonstrating interrelationships between plants and animals, conservation practices, wildlife management, plant succession, forestry, geologic features and other scientific phenomena. (JR)

Johnson, Janice K.

1973-01-01

116

Refocusing Natural Resource Management  

NSDL National Science Digital Library

Achieving scientific literacy requires students to understand how science is applied in the real world. A capstone class at Virginia Tech focuses on the role science and scientists play in the process of natural resource management. As a result, students

Harrison, Autumn-Lynn; Berkson, Jim

2002-05-01

117

Modeling Natural Selection  

NSDL National Science Digital Library

In their research, scientists generate, test, and modify scientific models. These models can be shared with others and demonstrate a scientist's understanding of how the natural world works. Similarly, students can generate and modify models to gain a bet

Lotter, Christine; Bogiages, Christopher A.

2011-02-01

118

Parallels with nature  

NASA Astrophysics Data System (ADS)

Adam Nelson and Stuart Warriner, from the University of Leeds, talk with Nature Chemistry about their work to develop viable synthetic strategies for preparing new chemical structures in parallel with the identification of desirable biological activity.

2014-10-01

119

Lesson "Balance in Nature  

NASA Astrophysics Data System (ADS)

Lesson "Balance in Nature" This simulation game-lesson (Balance in Nature) gives an opportunity for the students to show creativity, work independently, and to create models and ideas. It creates future-oriented thought connected to their experience, allowing them to propose solutions for global problems and personal responsibility for their activities. The class is divided in two teams. Each team chooses questions. 1. Question: Pollution in the environment. 2. Question: Care for nature and climate. The teams work on the chosen tasks. They make drafts, notes and formulate their solutions on small pieces of paper, explaining the impact on nature and society. They express their points of view using many different opinions. This generates alternative thoughts and results in creative solutions. With the new knowledge and positive behaviour defined, everybody realizes that they can do something positive towards nature and climate problems and the importance of individuals for solving global problems is evident. Our main goal is to recover the ecological balance, and everybody explains his or her own well-grounded opinions. In this work process the students obtain knowledge, skills and more responsible behaviour. This process, based on his or her own experience, dialogue and teamwork, helps the participant's self-development. Making the model "human? nature" expresses how human activities impact the natural Earth and how these impacts in turn affect society. Taking personal responsibility, we can reduce global warming and help the Earth. By helping nature we help ourselves. Teacher: Veselina Boycheva-Chapanova " Saint Patriarch Evtimii" Scholl Str. "Ivan Vazov"-19 Plovdiv Bulgaria

Chapanova, V.

2012-04-01

120

Texas' Natural Lake  

E-print Network

.? The Nature Conservancy?s Sustainable Waters program, designed to protect river ecosystems downstream of dams, has sponsored two workshops within the last year to determine the research needed to develop ecologically based environmental flow....? The Nature Conservancy?s Sustainable Waters program, designed to protect river ecosystems downstream of dams, has sponsored two workshops within the last year to determine the research needed to develop ecologically based environmental flow...

Wythe, Kathy

2006-01-01

121

Natural Dark Matter  

E-print Network

In this talk we analyse the claim that supersymmetry (SUSY) naturally accounts for the observed dark matter density. In many cases, it is necessary to tune the parameters of a SUSY model to fit the WMAP data. We provide a quantitative analysis of the degree of tuning required for different annihilation channels. Some regions are natural, requiring no tuning at all, whereas others require tuning at the 0.1% level.

S. F. King; J. P. Roberts

2006-09-15

122

Mining for Natural Resources  

NSDL National Science Digital Library

In this activity, students mine the chips from chocolate chip cookies. They weigh the cookies before and after mining, weigh the chips, and calculate the percent yield. This lab is designed to give students a better understanding of the processes involved in harvesting a natural resource and the impact it has on their environment and community. Analysis and conclusion questions focus on the fact that the mining of nonrenewable natural resources has a dramatic effect on our environment.

Obremski, Vince

123

Fossil Fuels: Natural Gas  

NSDL National Science Digital Library

This lesson provides an introduction to the use of natural gas as an energy source. Topics include its advantages (cleanliness, fewer carbon emissions), disadvantages (difficulty in transport and storage), sources, and usage. There is also a discussion of the creation and production of natural gas, the United States' production and reserves, and some potential new sources (coal bed methane, methane hydrates). The lesson includes an activity in which students investigate porosity and permeability in simulated sediments.

Pratte, John

124

Natural Resource Technician DACUM  

NSDL National Science Digital Library

The Advanced Technology Environmental and Energy Center (ATEEC) provides this DACUM, or curriculum development tool, for natural resources technician training programs. The document includes a general occupation description and required areas of competence like conducting natural resource inventories, conducting land potential assessment activities and delineating property boundaries. Users must download this resource for viewing, which requires a free log-in. There is no cost to download the item. The document is available in PDF file format.

2012-11-14

125

NatureNews  

NSDL National Science Digital Library

NatureNews is the science news website of the journal Nature. The site provides a daily summary of news about research and discoveries in life, physical and applied sciences, and clinical medicine. Materials include a daily top story, featured stories, videos, a news blog, and event announcements. There are also longer format reports, opinion features, podcasts, and an archive of past issues organized by year and month.

126

Adsorbed Natural Gas Technology  

Microsoft Academic Search

The current status of adsorbed natural gas technology for the vehicle fueling sector is reviewed. It is shown that there are\\u000a solutions to the all of the problems associated to adsorption storage, and that it is possible to build a light, compact,\\u000a and efficient system for storage, distribution, and dispensing of natural gas. The practical achievement of this objective\\u000a is

José Paulo Mota

127

Natural Hazards, Second Edition  

NASA Astrophysics Data System (ADS)

Natural disaster loss is on the rise, and the vulnerability of the human and physical environment to the violent forces of nature is increasing. In many parts of the world, disasters caused by natural hazards such as earthquakes, floods, landslides, drought, wildfires, intense windstorms, tsunami, and volcanic eruptions have caused the loss of human lives, injury, homelessness, and the destruction of economic and social infrastructure. Over the last few years, there has been an increase in the occurrence, severity, and intensity of disasters, culminating with the devastating tsunami of 26 December 2004 in South East Asia.Natural hazards are often unexpected or uncontrollable natural events of varying magnitude. Understanding their mechanisms and assessing their distribution in time and space are necessary for refining risk mitigation measures. This second edition of Natural Hazards, (following a first edition published in 1991 by Cambridge University Press), written by Edward Bryant, associate dean of science at Wollongong University, Australia, grapples with this crucial issue, aspects of hazard prediction, and other issues. The book presents a comprehensive analysis of different categories of hazards of climatic and geological origin.

Rouhban, Badaoui

128

Nature Tables: Stimulating Children's Interest in Natural Objects  

ERIC Educational Resources Information Center

Primary school pupils in the UK today may be less familiar with natural objects, less exposed to formal natural history teaching and have less time given to school-based observation and discussion of natural objects. This study of children's responses to a "Nature Table" of displayed natural objects was designed to assess pupils' knowledge of…

Tomkins, Stephen; Tunnicliffe, Sue Dale

2007-01-01

129

Comparação do desempenho de pré-escolares, mediante teste de desenvolvimento de Denver, antes e após intervenção nutricional  

Microsoft Academic Search

RESUMO — A análise de performance psicomotora de crianças institucionalizadas é de fundamental importância no planejamento de atividades edu- cativas. Estudos anteriores têm mostrado prejuízos desta função em crianças de creches. OBJETIVO. Comparar o desempenho no teste de triagem de Denver em crianças de 2 a 6 anos de idade, de creches conveniadas com a Prefeitura de São Paulo, antes

M. Fisberg; M. R. Pedromônico; J. A. P. Braga; A. M. A. Ferreira; C. Pini; S. C. C. Campos; S. O. Lemes; S. Silva; R. S. Silva; T. M. Andrade

1997-01-01

130

UMA ANÁLISE DO CUSTO DE VIAGEM PARA A PRAIA DA AVENIDA EM MACEIÓ  

Microsoft Academic Search

A cidade de Maceió em Alagoas constitui uma cidade litorânea da Região Nordeste do Brasil dotada de beleza natural tais como praias e lagoas, as quais constituem atrativos para o turismo tanto nacional como internacional. Todavia, nesta o crescimento do setor turístico tem sido afetado pela poluição dos recursos ambientais, mais especificamente o despejo do esgoto em praias e lagoas.

Eliane Aparecida Pereira De Abreu; Agnaldo Gomes da Silva; Gilberto Gomes Da Silva Junior; Rebecca Suzannah Nascimento De Melo

2008-01-01

131

Blackouts and natural risks  

NASA Astrophysics Data System (ADS)

"Blackout" has become the common definition for the situation when electricity supply and demand are not balanced and security of supply fails. These failures have many impacts besides the lights going out, but this term is used commonly. Blackouts have drastic impacts for the society on whole and its citizens and some of them can influence big areas and last for long period, so the consequences are catastrophic. Even if at the European scale, the large extend blackouts are supposed to be exceptional, real frequency is relatively high, approximately once per two years. According to statistics, blackouts are often caused by natural causes, especially lightning. An example of lightning caused blackout is New York blackout 1977, leading to the stand-by of nuclear power plant Indian Point and with overall cost more than 300 mil. USD. There is a clear a distinction between those blackouts caused by nature and those that were caused by other faults. Usually, the nature-caused disturbances as Canada 1988, Sweden 2005 and France 1999, stay inside one country. However, their duration can extend to several weeks, and thus the costs of the interruptions and social impacts are high. Blackouts of only technologic and/or anthropogenic origin are frequently shorter, but may concern more end-users, when cascading from one country to another. Lightning is not the only natural event causing blackouts. Eighteen various case studies of blackout caused by natural events different then lightning were studied and following natural phenomenon found as a root causes: 1x forest fire, 1x snow calamity, 1x ice storm, 1x landslide, 1x high temperature, 1x geomagnetic storm, 2x earthquake, 2x inundation, 2x contact of line with trees, 6x storm (wind, hurricane…). We can conclude, that natural event are frequent cause of blackout of medium or large extend and this phenomena should be studied more in details. This contribution was supported by Ministry of Environment of the Czech Republic.

Danihelka, P.; Paldusová, E.; Dobeš, P.

2009-04-01

132

Complexity in natural landform patterns  

PubMed

Patterns in nature, such as meandering rivers and sand dunes, display complex behavior seemingly at odds with their simplicity of form. Existing approaches to modeling natural landform patterns, reductionism and universality, are incompatible with the nonlinear, open nature of natural systems. An alternative modeling methodology based on the tendency of natural systems to self-organize in temporal hierarchies is described. PMID:10102803

Werner

1999-04-01

133

Enhance Nature Exploration with Technology  

ERIC Educational Resources Information Center

Kids and nature seem like a natural combination, but what was natural a generation ago is different today. Children are spending less time outdoors but continue to need nature for their physical, emotional, and mental development. This fact has led author Richard Louv to suggest that today's children are suffering from "nature-deficit disorder"…

Holloway, Patricia; Mahan, Carol

2012-01-01

134

O que bil?ngues bimodais t?m a nos dizer sobre desenvolvimento bil?ngue?  

PubMed Central

O objetivo deste trabalho é apresentar o que as pesquisas que estamos desenvolvendo com crianças ouvintes, filhas de pais surdos, adquirindo Língua Brasileira de Sinais (Libras) e Português e Língua de Sinais Americana (ASL) e Inglês (Lillo-Martin et al. 2010) têm a nos dizer sobre desenvolvimento bilíngue. Os dados deste estudo fazem parte de um banco de dados de interações espontâneas coletadas longitudinalmente, alternando contextos de aquisição da Libras e do português como língua alvo, no Brasil e dados coletados longitudinalmente. nos mesmos contextos, de crianças adquirindo ASL e inglês1. Além disso, há também dados do estudo experimental com testes aplicados nos dois pares de línguas que se agregam ao presente estudo. Uma visão geral dos estudos desenvolvidos sobre a aquisição bilíngue bimodal por crianças ouvintes, filhas de pais surdos, será apresentada e, então, serão expostos alguns aspectos linguísticos deste tipo de aquisição, considerando as discussões sobre aquisição bilíngue a partir da pesquisa realizada. PMID:24431480

de Quadros, Ronice Muller; Lillo-Martin, Diane; Pichler, Deborah Chen

2013-01-01

135

Desenvolvimento motor na infância: influência dos fatores de risco e programas de intervenção Motor development in childhood: influence of the risk factors and intervention programs  

Microsoft Academic Search

RESUMO Objetivos. Fornecer informações quanto ao desenvolvimento motor infantil, especificar os fatores de risco ambientais e bio - lógicos que podem influenciar a seqüência típica do desenvolvi - mento, além de investigar os efeitos de programas de interven- ção motora. Método. Foi realizada a captação de publicações através de bancos de dados científicos eletrônicos (Medline, Pubmed e SciELO), além de

Aline Willrich; Camila Cavalcanti; Fatturi de Azevedo; Juliana Oppitz

136

EMS in the pueblos.  

PubMed

Imagine creating a movie by excerpting scenes from "Dances With Wolves," splicing it with footage from "Code 3" or "Emergency Response" and then flavoring the script with the mystery of a Tony Hillerman novel. A film producer would probably find it quite difficult to choreograph a finished product from such a compilation of material. To hundreds of Native American EMS providers, however, such a movie is played out every day in Indian country. And with this movie come some real-life problems, including trauma, which is the number-one cause of premature death among Native Americans. But a high trauma rate is just one of the challenges facing tribal EMS responders. There's also prolonged response and transport, the problems involved in maintaining the unique culture and standard of care, the challenges of tribal EMS administration and EMS education of Native American students, and the unsure future of Native American EMS. Beyond that, there's the fact that EMS is a s unique to each Indian reservation as are the cultures of the native peoples who reside on these lands. Yet while no two systems are alike, most tribal EMS providers face similar challenges. PMID:10131740

Vigil, M A

1994-02-01

137

O Desenvolvimento da Produção de Termos Relativos a Espaços em Crianças e Adultos The Development of Terms Relating to Space in Children and Adults  

Microsoft Academic Search

In the three studies here described we aimed at determining when children (form public and private schools), college students and adults (who had completed the 5 th grade) begin to appropriately use terms that refer to space. The terms we investigated were ''on'' or ''on the top of '', ''in'' or ''inside of '', ''taking off '', ' 'taking out'',

Maria da Graça; Bompastor Borges Dias; Maria Laetitia Dantas; Boudoux Silva; Lisandra Mendonça de Carvalho; Fabiana Maria Lopes Haluli

138

O desenvolvimento compartilhado de impressos como estratégia de educação em saúde junto a trabalhadores de escolas da rede pública do Estado do Rio de Janeiro  

Microsoft Academic Search

This article describes the process and results of an experience with preparing a mural entitled A Day in the Life of the School Lunch Cook, conducted with public school employees in the State of Rio de Janeiro by a team of researchers and students from the Specialization Course in Workers' Health at the Center for Studies on Workers' Health of

Kátia Reis de Souza; Brani Rozemberg; Adriana Kelly-Santos; Nancy Yasuda; Marta Sharapin

2003-01-01

139

Natural photonic crystals  

NASA Astrophysics Data System (ADS)

Photonic structures appeared in nature several hundred millions years ago. In the living world, color is used for communication and this important function strongly impacts the individual chances of survival as well as the chances to reproduce. This has a statistical influence on species populations. Therefore, because they are involved in evolution, natural color-generating structures are - from some point of view - highly optimized. In this short review, a survey is presented of the development of natural photonic crystal-type structures occurring in insects, spiders, birds, fishes and other marine animals, in plants and more, from the standpoint of light-waves propagation. One-, two-, and three-dimensional structures will be reviewed with selected examples.

Vigneron, Jean Pol; Simonis, Priscilla

2012-10-01

140

[Natural transformation in bacteria].  

PubMed

Transformants may be formed by some bacterial species when the growing cultures are mixed. This phenomenon caused by the DNA release from bacterial cells is called natural transformation. DNA release is most likely to be mediated by cell autolysis. Both chromosomal markers and plasmids are transferred by natural transformation. The phenomenon is reproduced while growing bacteria together in sterile soil. The DNA adsorbed on sand and other soil solid particles was more resistant to DNAse action, than the free transforming DNA. Natural transformation seems to be one of the forms of the genetic exchange in bacteria in their habitats. An indirect argument for this suggestion is perfect coordination between the different steps of transformation process, at least, in some bacterial species. PMID:2185417

Kosovich, P V; Prozorov, A A

1990-01-01

141

Breastfeeding: Nature's Safety Net  

PubMed Central

ABSTRACT Breastfeeding is a natural safety-net for the first few months in order to give the child a fairer start to life. The American Academy of Pediatric Dentistry recognizes the distinct nutritional advantages of human milk for infants and endorsed the position of the American Academy of Pediatrics on the promotion of breastfeeding. It therefore calls for increase in need to negotiate the roles and responsibilities of pediatric dentists to eliminate the existing gaps in preventive care and anticipatory guidance. The objective of this evidence-based review is to explore the beneficial roles of breastfeeding in orofacial growth and development and endorse the same through anticipatory guidance. How to cite this article: Agarwal M, Ghousia S, Konde S, Raj S. Breastfeeding: Nature’s Safety Net. Int J Clin Pediatr Dent 2012;5(1):49-53.

Ghousia, S; Konde, Sapna; Raj, Sunil

2012-01-01

142

SIGNIFICANT NATURAL HERITAGE AREAS (NC)  

EPA Science Inventory

The North Carolina Department of Environment and Natural Resources, Division of Parks and Recreation, Natural Heritage Program in cooperation with the NC Center for Geographic Information & Analysis, developed the Significant Natural Heritage Areas digital data to determine the a...

143

Natural Resource Management Graduate Schools  

E-print Network

Natural Resource Management Graduate Schools University of Alaska Fairbanks, Alaska 99775 Program: Natural Resource Management http://www.uaf.edu/salrm/students/grad_degree.html University of Arizona Tucson, Arizona 85721 Program: Natural Resources Studies http

144

Bioactive oligosaccharide natural products.  

PubMed

Covering up to December 2013. Oligosaccharide natural products target a wide spectrum of biological processes including disruption of cell wall biosynthesis, interference of bacterial translation, and inhibition of human ?-amylase. Correspondingly, oligosaccharides possess the potential for development as treatments of such diverse diseases as bacterial infections and type II diabetes. Despite their potent and selective activities and potential clinical relevance, isolated bioactive secondary metabolic oligosaccharides are less prevalent than other classes of natural products and their biosynthesis has received comparatively less attention. This review highlights the unique modes of action and biosynthesis of four classes of bioactive oligosaccharides: the orthosomycins, moenomycins, saccharomicins, and acarviostatins. PMID:24883430

McCranie, Emilianne K; Bachmann, Brian O

2014-08-01

145

Natural Resources Conservation Service  

NSDL National Science Digital Library

A division of the US Department of Agriculture, the Natural Resources Conservation Service (NRCS) has a mission to provide leadership and partner with private land owners to "help people conserve, maintain, and improve our natural resources and environment." Their home page is useful in that regard as it currently provides significant information on topics related to the 2002 Farm Bill, water quality and quantity, wildfires, conservation, and more. The site is easy to navigate, with top and side navigation bars that allow users to select information based on either the type of information or the category of user.

1969-12-31

146

Introduction to Natural Selection  

NSDL National Science Digital Library

This lesson will help students develop an understanding of natural selection, specifically, how it unfolds from generation to generation. The Motivation section introduces a species of bird that became (over millions of years) numerous species, through adaptation. The Development section is a hands-on activity that demonstrates how populations change little by little, generation by generation, due to survival of species that have traits that are beneficial in an environment. Students will learn why organisms evolve over time, how natural selection works, and how certain factors determine survival and differences in organisms.

147

Natural Hazards Observer  

NSDL National Science Digital Library

The Natural Hazards Center of the University of Colorado Boulder offers a free online professional hazards publication called the Natural Hazards Observer. Readers will find information on current disaster issues; new international, national, and local disaster management, mitigation, and education programs; hazards research; political and policy developments; new information sources; upcoming conferences; and recent publications. The January 2003 issue (the latest of the bimonthly publication, which dates back to 1996) includes reports with titles such as Congress Passes Inland Flood Warning Bill and Dam Safety Act Passed. Those interested can view the issues online, download and view them, and even search their content by various parameters.

1996-01-01

148

Natural History Notebooks  

NSDL National Science Digital Library

The Canadian Museum of Nature (CMN) offers an online version of its Natural History Notebook series originally published in 1977-81. Interesting facts and attractive black-and-white sketches are provided for each of the nearly 250 animal species (mostly vertebrates) featured in the Web site. All illustrations are by Charles Douglas, former chief illustrator at CMN. The notebook collection includes one each for mammals, birds, fish, reptiles, amphibians, invertebrates, endangered or extinct species, prehistoric life, and another that allows users to search for animals by geographical region.

1969-12-31

149

Measuring natural resource scarcity  

SciTech Connect

Conclusions concerning trends in natural resource scarcity may depend critically on the choice of scarcity index. Unfortunately, the prevalence of vertical integration in natural resource industries has hindered the use of some otherwise desirable scarcity measures. In this paper duality theory is used to derive an econometric procedure for estimating one such measure, the shadow price of the resource in situ. Empirical results for the Canadian metal mining industry indicate that resource scarcity as measured by this shadow price has decreased substantially over time. 23 refernces, 1 table.

Halvorsen, R.; Smith, T.R.

1984-10-01

150

Naturally produced carbon nanotubes  

NASA Astrophysics Data System (ADS)

Carbon nanotubes represent an impressive kind of materials with diverse unexpected properties, and different methods to artificially produce them have been developed. Recently, they have also been synthesized at low temperatures, demonstrating that these materials might exist in fluids or carbon rocks of the Earth's crust. A new type of natural encapsulated carbon nanotubes found in a coal-petroleum mix is presented. These findings show that all allotropic carbon forms known up to date can be produced in Nature, where pressure, catalysts particles, shear stress and parameters other than exclusively very high temperature, seem to play an important role for producing nanotubes.

Velasco-Santos, C.; Martínez-Hernández, A. L.; Consultchi, A.; Rodríguez, R.; Castaño, V. M.

2003-05-01

151

Environmental Media Services (EMS)  

NSDL National Science Digital Library

Environmental Media Services (EMS) is a nonprofit communications clearinghouse committed to the expansion of media coverage on critical environmental and public health issues. True to their mission, EMS staff "build relationships with top scientists, physicians, and other experts to bring journalists the latest and most credible information." EMS's modest homepage is free of clutter but full of content. While several sections are under construction and updates (currently) appear irregular, a series of available articles provides useful summaries of important environmental news issues over the past six months. Current articles include "The impacts of global warming on the oceans" and "Cool companies," among others.

152

Dye Like A Natural  

NSDL National Science Digital Library

In this activity, learners stain fabrics--on purpose! Learners explore the art of natural dyeing by using dyes and substrates that are both derived from plant or animal sources as well as mordant solutions. Learners compare the color and effectiveness of different mordant/dye combinations on the different substrates.

Yu, Julie

2010-01-01

153

Contaminants in Naturally Ventilated  

E-print Network

a natural ventilation/flushing Volcanic Magma Chambers Deep Ocean Recirculation Basins Lakes Buildings (My? Passive (Gaseous) Particulate Radon Paint Fumes Gas Odours CO2 This is a very short, very incomplete list;Displacement Ventilation An air distribution system in which incoming air originates at floor level and rises

Politècnica de Catalunya, Universitat

154

Criteria for Natural Hierarchies  

E-print Network

With the discovery of a particle that seems rather consistent with the minimal Standard Model Higgs boson, attention turns to questions of naturalness, fine-tuning, and what they imply for physics beyond the Standard Model and its discovery prospects at run II of the LHC. In this article we revisit the issue of naturalness, discussing some implicit assumptions that underly some of the most common statements, which tend to assign physical significance to certain regularization procedures. Vague arguments concerning fine-tuning can lead to conclusions that are too strong and perhaps not as generic as one would hope. Instead, we explore a more pragmatic definition of the hierarchy problem that does not rely on peeking beyond the murky boundaries of quantum field theory: we investigate the fine-tuning of the electroweak scale associated with thresholds from heavy particles, which is both calculable and dependent on the nature of the would-be ultraviolet completion of the Standard Model. We discuss different manifestations of new high-energy scales that are favored by experimental hints for new physics with an eye toward making use of fine-tuning in order to determine natural regions of the new physics parameter spaces.

Andre de Gouvea; Daniel Hernandez; Tim M. P. Tait

2014-02-11

155

Accommodating Wind's Natural Behavior  

Microsoft Academic Search

Integration of wind-power plants into the electric power system presents challenges to power-system planners and operators. These challenges stem primarily from the natural characteristics of wind plants, which differ in some respects from conventional plants. Wind plants operate when the wind blows, and their power levels vary with the strength of the wind. Hence, they are not dispatchable in the

Edgar DeMeo; Gary Jordan; Clint Kalich; Jack King; Michael Milligan; Cliff Murley; Brett Oakleaf; Matthew Schuerger

2007-01-01

156

How Nature Makes Sense  

Microsoft Academic Search

Traditionally the aim of science is partly associated with the discovery of things and properties, and partly identified with finding of laws of nature. Because laws are taken to explain why particular phenomena are what they are, or occur as they occur, science is interested in revealing as many l aws as possible. Whenever we observe thing sa nd properties

Jan Faye

157

Saving Natural Areas.  

ERIC Educational Resources Information Center

This manual serves as a handbook for those involved in the art of land saving. The various topics in the booklet are dealt with in great detail since little has been published on the preservation of natural areas in international publications. Most of the document is derived from articles, books, and publications published by, or describing the…

Buchinger, Maria

158

Reinventing Natural Selection  

ERIC Educational Resources Information Center

Although many research studies report students' Lamarckian misconceptions, only a few studies present learning and teaching strategies that focus on the successful development of the concept of natural selection. The learning and teaching strategy for upper secondary students (aged 15-16) presented in this study conducted in The Netherlands is…

Geraedts, Caspar L.; Boersma, Kerst Th.

2006-01-01

159

Demystifying Nature of Science  

ERIC Educational Resources Information Center

With the emergence of the "Next Generation Science Standards" ("NGSS"; NGSS Lead States 2013), it is apparent that teaching and learning about nature of science (NOS) continues to be an important goal of science education for all K-12 students. With this emphasis on NOS, early childhood teachers are asking how to design…

Lederman, Judith; Bartels, Selina; Lederman, Norman; Gnanakkan, Dionysius

2014-01-01

160

A Natural Hazards Workbook.  

ERIC Educational Resources Information Center

This paper discusses the development of and provides examples of exercises from a student workbook for a college-level course about natural hazards. The course is offered once a year to undergraduates at Western Illinois University. Students are introduced to 10 hazards (eight meteorological plus earthquakes and volcanoes) through slides, movies,…

Kohler, Fred

161

Naturally produced carbon nanotubes  

Microsoft Academic Search

Carbon nanotubes represent an impressive kind of materials with diverse unexpected properties, and different methods to artificially produce them have been developed. Recently, they have also been synthesized at low temperatures, demonstrating that these materials might exist in fluids or carbon rocks of the Earth’s crust. A new type of natural encapsulated carbon nanotubes found in a coal–petroleum mix is

C. Velasco-Santos; A. L. Mart??nez-Hernández; A. Consultchi; R. Rodr??guez; V. M. Castaño

2003-01-01

162

Natural Hazards in Peru  

Microsoft Academic Search

Peru is a land of contrasts, with natural hazards occurring in coastal deserts, high Andean mountains, and humid Amazon lowlands. Increasingly, however, population growth exposes more people to risks as cities spread and as land use must intensify. These social features interact with a heterogeneous distribution of seismic risks shaped by the way the Nazca plate subducts, causing earthquakes to

Kenneth R. Young; Blanca León

2009-01-01

163

Picturing the Natural Environment  

ERIC Educational Resources Information Center

Around Scout Island Education Center, a site used by schools in Fresno County to explore the area's natural environment, a total of 200 cylinder-shaped concrete stools display tiles representing small mammals, flying insects, birds, wildflowers, and more. Twenty sets have been created by elementary, middle, and high-school art students as part of…

Johnson, Phyllis Scott

2011-01-01

164

Picturing the Natural World  

ERIC Educational Resources Information Center

How is the natural environment in the neighborhood representative of the larger biosphere in which people live? Studying the local birds and flora of the Pacific Northwest in the context of the local parks and ponds provided a rich opportunity for third-grade students at St. Thomas School in Medina, Washington, to explore and learn about…

Salia, Hannah

2011-01-01

165

Natural antiemetics: an overview.  

PubMed

Emesis encompasses the forceful expulsion of the contents of stomach via the mouth or sometimes the nose. The adverse effects of currently available anti-emetic agents potentiate the natural product researchers to explore the natural anti-emetics with fewer side effects. The presented communication constitutes a review on anti-emetic effect of two hundred and forty five plants belonging to seventy-eight families found in different parts of the world. It also outlined the anti-emetic effect of plant extracts and isolated secondary metabolites studied through a variety of animal models of emesis. The reported anti-emetic plants in different countries and cultures and the scientific studies on extracts may help in the identification of promising single chemical compound(s) that may be used as a potential leads for developing safe anti-emetic agents in future. Moreover the reported secondary metabolites having the same effect may open the door for the search of same secondary metabolites from other natural sources. This review will provide useful information for the discovery of natural anti-emetic compounds and fill the gaps in knowledge. PMID:25176254

Ahmed, Salman; Hasan, Muhammad Mohtasheemul; Ahmed, Syed Waseemuddin

2014-09-01

166

The Nature of Diamonds  

NSDL National Science Digital Library

This Web site looks at how diamonds are created (naturally and synthetically), and how they have been used throughout history. It contains information on composition and structure, the origins and history of diamonds, mining & distribution and an overview of the many uses of diamonds and how they are grown synthetically. A bibliography provides a listing of more than 75 resources for further study.

167

Natural gas processing  

Microsoft Academic Search

The Ortloff Corp.'s approach of processing natural gas by expansion in at least two stages through turboexpanders with interstage cooling results in a flexible combination of advantages that include (1) for constant recovery of desired liquids, significantly reduced energy requirements or (2) for a constant energy requirement, significantly improved yields. In addition, both advantages are possible under certain conditions. Furthermore,

R. E. Campbell; J. B. Lawrence; R. R. Tonne

1977-01-01

168

Natural Language Interface  

NSDL National Science Digital Library

This case study, by David M. Lane of Rice University, assesses the question, "Is it easier to learn to use computer software that uses natural language commands?" Main concepts are analysis of covariance, adjusted means, and boxplots. The experimental design, descriptive statistics, inferential statistics, and raw data are all given.

Lane, David M.

2009-02-05

169

A Natural Experiment in \\  

Microsoft Academic Search

This paper uses the television game show 'Jeopardy!' as a natural experiment to analyze behavior under uncertainty and the ability of players to choose strategic best-responses. The results suggest that, while most players bet in a rational manner, the failure rate for choosing best-responses increases as the betting problem grows more complex and that players' choices are affected by the

Andrew Metrick

1995-01-01

170

Natural vegetation inventory  

NASA Technical Reports Server (NTRS)

Unique characteristics of ERTS imagery can be used to inventory natural vegetation. While satellite images can seldom be interpreted and identified directly in terms of vegetation types, such types can be inferred by interpretation of physical terrain features and through an understanding of the ecology of the vegetation.

Schrumpf, B. J.

1973-01-01

171

Natural Gas Annual  

EIA Publications

Provides information on the supply and disposition of natural gas in the United States. Production, transmission, storage, deliveries, and price data are published by state for the current year. Summary data are presented for each state for the previous 5 years.

2013-01-01

172

Nature in the City  

NSDL National Science Digital Library

Nature in the City is a project of the Earth Island Institute, and is "wholly dedicated to ecological conservation, restoration and stewardship of the [San] Franciscan bioregion." Their website's "About" section gives a thorough explanation of not only their goals, as well as a definition of nature. Furthermore, this section provides some philosophical insight into what exactly "urban nature" happens to be. Those visitors interested in a more visceral tour of San Francisco should check out the "Photo Gallery" link, and they should be sure to check out the "Natural Areas" album to view some eerie-looking oak woodlands in Golden Gate Park. Additionally, visitors to the site who are interested in the life that teems on Alcatraz Island will enjoy file number fourteen which includes an image of roosting double-crested cormorants on a dramatic hillside. Finally the "Local Ecology" link has an explanation of the "Biodiversity Crisis" in San Francisco, which can be attributed to ecological, political, institutional, social and cultural factors.

173

The Nature of Diamonds  

NASA Astrophysics Data System (ADS)

The paragon of physical perfection and a sparkling example of Earth's forces at work, the diamond has fascinated all realms of society, from starlets to scientists. The Nature of Diamonds is a comprehensive look at nature's most coveted gem. A handsome, large-format book, The Nature of Diamonds is an authoritative and richly-illustrated tribute to the diamond. Leading geologists, gemologists, physicists, and cultural observers cover every facet of the stone, from its formation in the depths of the Earth, its ascent to the surface, and its economic, regal, social, and technological roles. Cutting-edge research takes the reader to the frontiers of diamond exploration and exploitation, from the Arctic wastes to the laboratories where diamonds are created for massive road shredders that rip up and then re-create superhighways. Here also is an overview of cutting, from the rough stones in Roman rings to the highly-faceted stones we see today, and a glimpse into the business of diamonds. Finally, The Nature of Diamonds chronicles scientific and cultural history and explores the diamond as both a sacred and a social symbol, including a picture history of betrothal rings. Wide-ranging illustrations explain the geology of diamonds, chart the history of mining from its origins in India and Brazil through the diamond rush in South Africa and today's high-tech enterprises, and capture the brilliance and beauty of this extraordinary gem. _

Harlow, George E.

1997-10-01

174

The Nature of Evolution  

ERIC Educational Resources Information Center

The nature of evolution, the historical change in the universe, and the change that is caused by the workings of the dynamic processes at the smallest and largest scales are studied. It is viewed that the cumulative change in the historical systems is caused by evolution, which is a type of causal relationship and evolutionary processes could be…

Alles, David L.

2005-01-01

175

NATURAL MARINE HYDROCARBON SEEPAGE  

E-print Network

. Using 3.5 kHz sonar data, seep distribution offshore of Coal Oil Point was mapped forAugust 1996, July in the environment (Hovland et al., 1993; Hornafius et al., 1999). Natural marine hydrocarbon seeps offshore of Coal. 1). Farther offshore, seepage passes through overlying Sisquoc Formation cap rock and includes both

Luyendyk, Bruce

176

Natural Radioactivity in Bananas  

Microsoft Academic Search

The content of 40K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, Sa~o Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself and also soil

V. A. B. Zagatto; N. H. Medina; E. Okuno; N. K. Umisedo

2008-01-01

177

Natural Radioactivity in Bananas  

Microsoft Academic Search

The content of 40K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, São Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself and also soil

V. A. B. Zagatto; N. H. Medina; E. Okuno; N. K. Umisedo

2008-01-01

178

Natural hazards science strategy  

USGS Publications Warehouse

The mission of the U.S. Geological Survey (USGS) in natural hazards is to develop and apply hazard science to help protect the safety, security, and economic well-being of the Nation. The costs and consequences of natural hazards can be enormous, and each year more people and infrastructure are at risk. USGS scientific research - founded on detailed observations and improved understanding of the responsible physical processes - can help to understand and reduce natural hazard risks and to make and effectively communicate reliable statements about hazard characteristics, such as frequency, magnitude, extent, onset, consequences, and where possible, the time of future events. To accomplish its broad hazard mission, the USGS maintains an expert workforce of scientists and technicians in the earth sciences, hydrology, biology, geography, social and behavioral sciences, and other fields, and engages cooperatively with numerous agencies, research institutions, and organizations in the public and private sectors, across the Nation and around the world. The scientific expertise required to accomplish the USGS mission in natural hazards includes a wide range of disciplines that this report refers to, in aggregate, as hazard science. In October 2010, the Natural Hazards Science Strategy Planning Team (H-SSPT) was charged with developing a long-term (10-year) Science Strategy for the USGS mission in natural hazards. This report fulfills that charge, with a document hereinafter referred to as the Strategy, to provide scientific observations, analyses, and research that are critical for the Nation to become more resilient to natural hazards. Science provides the information that decisionmakers need to determine whether risk management activities are worthwhile. Moreover, as the agency with the perspective of geologic time, the USGS is uniquely positioned to extend the collective experience of society to prepare for events outside current memory. The USGS has critical statutory and nonstatutory roles regarding floods, earthquakes, tsunamis, landslides, coastal erosion, volcanic eruptions, wildfires, and magnetic storms - the hazards considered in this plan. There are numerous other hazards of societal importance that are considered either only peripherally or not at all in this Strategy because they are either in another of the USGS strategic science plans (such as drought) or not in the overall mission of the USGS (such as tornados).

Holmes, Robert R.; Jones, Lucile M.; Eidenshink, Jeffery C.; Godt, Jonathan W.; Kirby, Stephen H.; Love, Jeffrey J.; Neal, Christina A.; Plant, Nathaniel G.; Plunkett, Michael L.; Weaver, Craig S.; Wein, Anne; Perry, Suzanne C.

2012-01-01

179

Natural Solutions Response July 24, 2007 1 Natural Solutions  

E-print Network

Natural Solutions Response July 24, 2007 1 Natural Solutions 1890 Sierra Rd. East Helena, MT 59602 SW 6th Avenue, Suite 100 Portland, OR 97204-1348 Dear Ms. O'Toole: Natural Solutions appreciates considerably upon current information and results. The test proposed by Natural Solutions in 200753500 has been

180

Syllabus Natural Resource Policy & Administration 1 Natural Resource Policy & Administration  

E-print Network

Syllabus ­ Natural Resource Policy & Administration 1 Natural Resource Policy & Administration FNR and related natural resources administration and policies in the United States; policy components; policy of the course, you should be able to: State the key provisions of major natural resource policies Explain

Watson, Craig A.

181

Go Abroad in Natural ResourcesNatural Resources  

E-print Network

Go Abroad in Natural ResourcesNatural Resources Program Contact: Connie Patterson Program.edu/ international The Natural Resources degree is ideally suited for students who wish to study abroad! The sustainable management of natural resources is a fundamental issue, both locally and globally. Scientists

Escher, Christine

182

Introduction to Natural Resource Damage  

E-print Network

Introduction to Natural Resource Damage Assessment Linda Burlington, NOAA Office of General Counsel.fws.gov/contaminants www.restoration.doi.gov/ www.doi.gov/oepc #12;Definitions 13 #12;14 Natural Resource Damage (NRD of a natural resource service. (OPA regs) · Damages: amount of money sought by the natural resource trustee

183

warnell school Forestry & Natural Resources  

E-print Network

#12;#12;warnell school Forestry & Natural Resources 2009 Annual Report o #12;VisionTo be recognized as one of the top five forestry and natural resource programs in the United States. Mission's renewable natural resources; and to place latest ideas and technology in forestry and natural resource

Hall, Daniel

184

Nature, culture, and civil society  

Microsoft Academic Search

Civil societies are related in complex ways with the nature that surrounds them. Drawing upon ecological principles, social, economic, and political theories, and empirical evidence from environmental psychology, we explore the ongoing dialectic between nature and culture—how humans alter nature and nature alters humans, their cultures and associations—with particular reference to civil society. In our view, civil society scholars overlook

Julianne Lutz Newton; William C. Sullivan

2005-01-01

185

Method for liquifying natural gas  

Microsoft Academic Search

A method for liquefying natural gas comprises heat exchanging a pressurized natural gas with two independent coolant circuits. The first coolant circuit pre-cools the compressed natural gas. After the natural gas is pre-cooled in the first circuit, a major portion is liquefied in heat exchange with the coolant in the second circuit while the remaining minor portion is liquefied in

Forg

1980-01-01

186

Natural Dark Energy  

E-print Network

It is now well accepted that both Dark Matter and Dark Energy are required in any successful cosmological model. Although there is ample evidence that both Dark components are necessary, the conventional theories make no prediction for the contributions from each of them. Moreover, there is usually no intrinsic relationship between the two components, and no understanding of the nature of the mysteries of the Dark Sector. Here we suggest that if the Dark Side is so seductive then we should not be restricted to just 2 components. We further suggest that the most natural model has 5 distinct forms of Dark Energy in addition to the usual Dark Matter, each contributing precisely equally to the cosmic energy density budget.

Douglas Scott; Ali Frolop

2007-03-30

187

Naturally selecting solutions  

PubMed Central

For decades, computer scientists have looked to nature for biologically inspired solutions to computational problems; ranging from robotic control to scheduling optimization. Paradoxically, as we move deeper into the post-genomics era, the reverse is occurring, as biologists and bioinformaticians look to computational techniques, to solve a variety of biological problems. One of the most common biologically inspired techniques are genetic algorithms (GAs), which take the Darwinian concept of natural selection as the driving force behind systems for solving real world problems, including those in the bioinformatics domain. Herein, we provide an overview of genetic algorithms and survey some of the most recent applications of this approach to bioinformatics based problems. PMID:23222169

Manning, Timmy; Sleator, Roy D; Walsh, Paul

2013-01-01

188

PBS Science and Nature  

NSDL National Science Digital Library

Information on programs and related content for Public Broadcasting Service (PBS) television shows on science and nature, including "Nature," "Nova," "I, Cringely," and "Scientific American Frontiers." The site's home page features a listing of individual program episodes arranged by topic (archaeology and anthropology, earth and habitat, physics, technology and inventions, creatures, health and medicine, and space). There is also a listing of featured sites, programming schedules, and links to interactive features (quizzes, games, polls, and others). The PBS teachers' page provides access to lesson plans, interactives, and other resources based on PBS science programming. There are also links to materials for younger students, such as the "Dragonfly TV" site, with games, activities, podcasts, and other items, and hands-on activities from the program "ZOOMsci" which students can perform themselves.

189

Illinois Natural History Survey  

NSDL National Science Digital Library

The University of Illinois at Urbana-Champaign is responsible for the Illinois Natural History Survey (INHS), whose mission is "to investigate and document the biological resources of Illinois...and to acquire and provide natural history information...to promote the common understanding, conservation, and management of these resources." Along the top of the page visitors can find headings that include "Research", "Data", "Publications", and "Events". The "Research" portion of the website includes seven areas of research from which to choose including "Entomology", "Invasive Species", "Wildlife Ecology", and "Human Interactions". The "Data" section provides ecological monitoring data, GIS data, a clearinghouse of wildlife ecology software, and collection databases which allow visitors to search for specimens of plants and animals. The "Publications" include educational materials, annual reports, manuals, a bulletin, and a circular. For those interested in events at the INHS, the "Events" link provides a nice calendar of upcoming seminars.

190

Investigating Natural Selection  

NSDL National Science Digital Library

In this activity, students experience one mechanism for evolution through a simulation that models the principles of natural selection and helps answer the question 'how might biological change have occurred and been reinforced over time?' Students will discover that species evolve over time and evolution is the consequence of the interaction of the potential for a species to increase in number, the genetic variability of offspring due to mutation and recombination of genes, a finite supply of the resources required for life, and the ensuing selection of those offspring better able to survive and leave offspring in a particular environment. Natural selection and its evolutionary consequences provide a scientific explanation for the fossil record of ancient life forms, as well as for the striking molecular similarities observed among the diverse species of living organisms. The site also contains a list of materials and all information and instructions required to complete this activity.

191

Nature Outlook: Malaria  

NSDL National Science Digital Library

The journal Nature provides a range of peer-reviewed scientific works on a weekly basis, along with science updates and materials aimed at the general public. This particular feature on malaria is available at no charge to the curious public, and as the homepage asks, "What will it take to finally subdue this deadly disease?" Visitors will find a collection of recent articles in the Outlook area, such as "The Numbers Game" and "Vaccines: The Take Home Lesson." Moving on, the Collection area brings together peer-reviewed pieces on the story behind the efforts to eradicate the disease, along with some nice pieces about how the disease is transmitted. It's easy to see how this collection could be used in a public health course, or in another classroom setting. Finally, the site also includes links to popular articles from Nature, along with other open access materials.

192

Epidemics after Natural Disasters  

PubMed Central

The relationship between natural disasters and communicable diseases is frequently misconstrued. The risk for outbreaks is often presumed to be very high in the chaos that follows natural disasters, a fear likely derived from a perceived association between dead bodies and epidemics. However, the risk factors for outbreaks after disasters are associated primarily with population displacement. The availability of safe water and sanitation facilities, the degree of crowding, the underlying health status of the population, and the availability of healthcare services all interact within the context of the local disease ecology to influence the risk for communicable diseases and death in the affected population. We outline the risk factors for outbreaks after a disaster, review the communicable diseases likely to be important, and establish priorities to address communicable diseases in disaster settings. PMID:17370508

Gayer, Michelle; Connolly, Maire A.

2007-01-01

193

Natural environment analysis  

NASA Technical Reports Server (NTRS)

Qualitative analyses (and quantitatively to the extend possible) of the influence of terrain features on wind loading of the space shuttle while on the launch pad, or during early liftoff, are presented. Initially, the climatology and meteorology producing macroscale wind patterns and characteristics fot he Vandenburg Air Force Base (VAFB) launch site are described. Also, limited field test data are analyzed, and then the nature and characteristic of flow disturbances due to the various terrain features, both natural and man-made, are then reviewed. Following this, the magnitude of these wind loads are estimated. Finally, effects of turbulence are discussed. The study concludes that the influence of complex terrain can create significant wind loading on the vehicle. Because of the limited information, it is not possible to quantify the magnitude of these loads.

1985-01-01

194

Notebaert Nature Museum  

NSDL National Science Digital Library

The Notebaert Nature Museum fosters environmental learning through its exhibits and over 100 science and nature programs. The museum puts a particular emphasis on environmental sustainability, with its extensive outdoor Greening Project exhibit and full sized Extreme Green House in the middle of the museum. It also boasts the only year round live butterfly exhibit in the region and River Works, an interactive water exhibit. The Museumâs new Teacher Advisory Board involves educators in brainstorming, evaluating, and piloting educational programming developed by Museum staff, and the Museum's Science Teaching Network is a summer institute and meetings designed to create a collaborative learning environment where teachers work together to develop integrated science curricula using classroom and Museum-based lessons. The website provides information on teacher workshops, field trips off site education, Scouts programs, summer camps, teen programs and community partnerships.

195

Notes on natural inflation  

NASA Astrophysics Data System (ADS)

In the so-called natural inflation, an axion-like inflaton is assumed to have a cosine-type periodic potential. This is not the case in a very simple model in which the axion-like inflaton is coupled to an SU(N) (or other) pure Yang–Mills, at least in the large N limit as pointed out by Witten. It has a multi-valued potential, which is effectively quadratic, i.e., there is only a mass term in the large N limit. Thanks to this property, chaotic inflation can be realized more naturally with the decay constant of the axion-like inflaton less than the Planck scale. We demonstrate these points explicitly by using softly broken Script N=1 Super-Yang-Mills which allows us to treat finite N. This analysis also suggests that moderately large gauge groups such as E8 are good enough with a Planck scale decay constant.

Yonekura, Kazuya

2014-10-01

196

Illinois Natural History Survey  

NSDL National Science Digital Library

The University of Illinois at Urbana-Champaign is responsible for the Illinois Natural History Survey (INHS), whose mission is "to investigate and document the biological resources of Illinois...and to acquire and provide natural history information...to promote the common understanding, conservation, and management of these resources." Along the top of the page visitors can find headings that include "Research", "Data", "Publications", and "Events". The "Research" portion of the website includes seven areas of research from which to choose including "Entomology", "Invasive Species", "Wildlife Ecology", and "Human Interactions". The "Data" section provides ecological monitoring data, GIS data, a clearinghouse of wildlife ecology software, and collection databases which allow visitors to search for specimens of plants and animals. The "Publications" include educational materials, annual reports, manuals, a bulletin, and a circular. For those interested in events at the INHS, the "Events" link provides a nice calendar of upcoming seminars.

2009-10-19

197

Technology Versus Nature  

NSDL National Science Digital Library

This article, written by a member of the Partnership for Advanced Technology in Housing, discusses building materials and practices that can improve residential installation's resistance to major storms and natural disasters. An example of an area that is using these weather resistant designs is in Florida; the article cites the vulnerability of coastal homes to hurricanes and outlines some efforts to build them in a more structurally sound manner.

Mcnulty, Maureen

2008-01-07

198

The Nature of Things  

NSDL National Science Digital Library

This site features interactive tools related to The Nature of Things television show. The tools include different videos and descriptions of a wide variety of subjects. Some examples include biomimicry, human illness, indoor pollution, and other issues affecting humans. The subject area covered is a very wide range, but users studying or interested in the human brain, biology of human beings, or relationships between animals will no doubt find this site intriguing.

2007-04-12

199

Obesity: Nature or Nurture?  

Microsoft Academic Search

\\u000a The debate about the causes of the current obesity epidemic rages on. The issue of “Whose fault is it?” frequently devolves\\u000a into a related question: “Is it ‘nature’ (i.e., inherent in our genes and biochemistry before birth, and therefore out of\\u000a our control) or ‘nurture’ (i.e., behaviors learned after birth and within our control to change)?” This chapter explores the

Robert H. Lustig

200

Natural Resource Ecology Laboratory  

NSDL National Science Digital Library

The Natural Resource Ecology Laboratory (NREL) at Colorado State University conducts multi-disciplinary research in ecosystem science, with the purpose of improving knowledge of "the complex interactions between humans, management activities, and ecosystems." The recently launched homepage, which is still under construction, includes background information on NREL; descriptions of research projects (a substantial and diverse list); publications, reports, and data; teaching and outreach; and contact information.

201

Cognitive Naturalism in Metaethics  

E-print Network

Blackburn's "quasi-realism" or "projectivism." I can see no advantage there over cognitive naturalism either, Quasi-realism is a sophisticated version of noncognitivism with the added hypothesis of a certain psychological process to explain why we... the matter, would refrain from committing acts of indiscriminate brutality. But why should the provision of such a guarantee constitute a theoretically necessary condition for having a successful metaethics? Consider a parallel objection that might...

Kelley, Leigh B.

1989-06-01

202

In defense of naturalism  

Microsoft Academic Search

History and the modern sciences are characterized by what is sometimes called a “methodological naturalism” that disregards\\u000a talk of divine agency. Some religious thinkers argue that this reflects a dogmatic materialism: a non-negotiable and a priori commitment to a materialist metaphysics. In response to this charge, I make a sharp distinction between procedural requirements and metaphysical commitments. The procedural requirement

Gregory W. Dawes

203

Introduction to Natural Selection  

NSDL National Science Digital Library

This lesson is an introduction to natural selection and is suited to any student who is just beginning his or her discovery of evolution. The motivation introduces a species of bird that became (over millions of years) numerous species, through adaptation. The development is a hands-on activity that demonstrates how populations change little by little, generation by generation, due to survival of species that have traits that are beneficial in an environment.

Science Netlinks;

2002-03-28

204

Natural Underwater Adhesives.  

PubMed

The general topic of this review is protein-based underwater adhesives produced by aquatic organisms. The focus is on mechanisms of interfacial adhesion to native surfaces and controlled underwater solidification of natural water-borne adhesives. Four genera that exemplify the broad range of function, general mechanistic features, and unique adaptations are discussed in detail: blue mussels, acorn barnacles, sandcastle worms, and freshwater caddisfly larva. Aquatic surfaces in nature are charged and in equilibrium with their environment, populated by an electrical double layer of ions as well as adsorbed natural polyelectrolytes and microbial biofilms. Surface adsorption of underwater bioadhesives likely occurs by exchange of surface bound ligands by amino acid sidechains, driven primarily by relative affinities and effective concentrations of polymeric functional groups. Most aquatic organisms exploit modified amino acid sidechains, in particular phosphorylated serines and hydroxylated tyrosines (dopa), with high-surface affinity that form coordinative surface complexes. After delivery to the surfaces as a fluid, permanent natural adhesives solidify to bear sustained loads. Mussel plaques are assembled in a manner superficially reminiscent of in vitro layer-by-layer strategies, with sequentially delivered layers associated through Fe(dopa)(3) coordination bonds. The adhesives of sandcastle worms, caddisfly larva, and barnacles may be delivered in a form somewhat similar to in vitro complex coacervation. Marine adhesives are secreted, or excreted, into seawater that has a significantly higher pH and ionic strength than the internal environment. Empirical evidence suggests these environment triggers could provide minimalistic, fail-safe timing mechanisms to prevent premature solidification (insolubilization) of the glue within the secretory system, yet allow rapid solidification after secretion. Underwater bioadhesives are further strengthened by secondary covalent curing. PMID:21643511

Stewart, Russell J; Ransom, Todd C; Hlady, Vladimir

2011-06-01

205

Nature by Numbers  

NSDL National Science Digital Library

This 4-minute computer animation highlights three forms in nature that have connections with numbers and geometry. The Fibonacci sequence and the golden ratio are shown relating to the chambered nautilus shell and the sunflower seed pattern. The Delaunay triangulation and Voronoi tessellation are shown to simulate the capillary distribution on a dragonfly wing. Included are descriptions of the mathematics and stills from the production.

2013-02-01

206

Nature and Man  

Microsoft Academic Search

Understanding human behavior is fundamental to understanding how organizations function, whether they are profit-making firms, non-profit enterprises, or government agencies. Much disagreement among managers, scientists, policy makers, and citizens arises from substantial differences in the way we think about human nature—about their strengths, frailties, intelligence, ignorance, honesty, selfishness, and generosity. In this paper we discuss five alternative models of human

Michael C. Jensen; William H. Meckling

1905-01-01

207

Religion is natural.  

PubMed

Despite its considerable intellectual interest and great social relevance, religion has been neglected by contemporary developmental psychologists. But in the last few years, there has been an emerging body of research exploring children's grasp of certain universal religious ideas. Some recent findings suggest that two foundational aspects of religious belief - belief in mind-body dualism, and belief in divine agents -- come naturally to young children. This research is briefly reviewed, and some future directions are discussed. PMID:17181713

Bloom, Paul

2007-01-01

208

Chlorophylls - natural solar cells  

E-print Network

A molecular modeling study was conducted on a series of six natural occurring chlorophylls. Quantum chemistry calculated orbital energies were used to estimate frequency of transitions between occupied molecular orbital and unoccupied molecular orbital energy levels of chlorophyll molecules in vivo conditions in standard (ASTMG173) environmental conditions. Obtained results are in good agreement with energies necessary to fix the Magnesium atom by chlorophyll molecules and with occurrence of chlorophylls in living vegetal organisms.

Jantschi, Lorentz; Balan, Mugur C; Sestras, Radu E

2011-01-01

209

Natural Underwater Adhesives  

PubMed Central

The general topic of this review is protein-based underwater adhesives produced by aquatic organisms. The focus is on mechanisms of interfacial adhesion to native surfaces and controlled underwater solidification of natural water-borne adhesives. Four genera that exemplify the broad range of function, general mechanistic features, and unique adaptations are discussed in detail: blue mussels, acorn barnacles, sandcastle worms, and freshwater caddisfly larva. Aquatic surfaces in nature are charged and in equilibrium with their environment, populated by an electrical double layer of ions as well as adsorbed natural polyelectrolytes and microbial biofilms. Surface adsorption of underwater bioadhesives likely occurs by exchange of surface bound ligands by amino acid sidechains, driven primarily by relative affinities and effective concentrations of polymeric functional groups. Most aquatic organisms exploit modified amino acid sidechains, in particular phosphorylated serines and hydroxylated tyrosines (dopa), with high-surface affinity that form coordinative surface complexes. After delivery to the surfaces as a fluid, permanent natural adhesives solidify to bear sustained loads. Mussel plaques are assembled in a manner superficially reminiscent of in vitro layer-by-layer strategies, with sequentially delivered layers associated through Fe(dopa)3 coordination bonds. The adhesives of sandcastle worms, caddisfly larva, and barnacles may be delivered in a form somewhat similar to in vitro complex coacervation. Marine adhesives are secreted, or excreted, into seawater that has a significantly higher pH and ionic strength than the internal environment. Empirical evidence suggests these environment triggers could provide minimalistic, fail-safe timing mechanisms to prevent premature solidification (insolubilization) of the glue within the secretory system, yet allow rapid solidification after secretion. Underwater bioadhesives are further strengthened by secondary covalent curing. PMID:21643511

Stewart, Russell J.; Ransom, Todd C.; Hlady, Vladimir

2011-01-01

210

Nature's Greatest Puzzles  

SciTech Connect

It is a pleasure to be part of the SLAC Summer Institute again, not simply because it is one of the great traditions in our field, but because this is a moment of great promise for particle physics. I look forward to exploring many opportunities with you over the course of our two weeks together. My first task in talking about Nature's Greatest Puzzles, the title of this year's Summer Institute, is to deconstruct the premise a little bit.

Quigg, Chris; /Fermilab

2005-02-01

211

Scitable by Nature Education  

NSDL National Science Digital Library

A free science library and personal learning tool brought to you by Nature Publishing Group, the world's leading publisher of science. Scitable currently concentrates on genetics, the study of evolution, variation, and the rich complexity of living organisms. As you cultivate your understanding of modern genetics on Scitable, you will explore not only what we know about genetics and the ways it impacts our society, but also the data and evidence that supports our knowledge.

212

Natural antibodies and cancer.  

PubMed

Immunity is not only responsible for recognition and elimination of infectious particles, but also for removal of cellular waste, modified self structures and transformed cells. Innate or natural immunity acts as a first line defense and is also the link to acquired immunity and memory. A striking phenomenon of immunity against malignant cells is that neither in animals nor in humans affinity-maturated tumor-specific IgG antibodies have been detected so far. All tumor-specific isolated antibodies were germ-line coded natural IgM antibodies. It's also a fact that these IgM's preferentially bind to carbohydrate epitopes on post-transcriptionally modified surface receptors and that they all induce a cancer-specific apoptosis, by triggering the intrinsic apoptotic pathway. From an evolutionary point of view, this makes sense because cancer cells are not infectious, so there is no need for memory. Natural IgMs bind to conservative structures because they are coded by a limited set of genes and they use apoptosis, the "clean" way of killing, to avoid inflammatory processes. PMID:17826951

Vollmers, H Peter; Brändlein, Stephanie

2007-12-01

213

Natural language generation  

NASA Astrophysics Data System (ADS)

The goal of natural language generation is to replicate human writers or speakers: to generate fluent, grammatical, and coherent text or speech. Produced language, using both explicit and implicit means, must clearly and effectively express some intended message. This demands the use of a lexicon and a grammar together with mechanisms which exploit semantic, discourse and pragmatic knowledge to constrain production. Furthermore, special processors may be required to guide focus, extract presuppositions, and maintain coherency. As with interpretation, generation may require knowledge of the world, including information about the discourse participants as well as knowledge of the specific domain of discourse. All of these processes and knowledge sources must cooperate to produce well-written, unambiguous language. Natural language generation has received less attention than language interpretation due to the nature of language: it is important to interpret all the ways of expressing a message but we need to generate only one. Furthermore, the generative task can often be accomplished by canned text (e.g., error messages or user instructions). The advent of more sophisticated computer systems, however, has intensified the need to express multisentential English.

Maybury, Mark T.

214

Toward a more natural medicine.  

PubMed

Modern science and culture attempt to dominate and control nature. Unfortunately contemporary medicine has followed this lead. Traditionally religion has recognized the order and goodness in the natural order and has encouraged followers to comply with the rules of nature. Medicine, from Hippocratic times, has viewed the physician as an assistant to nature. Contemporary medicine, while employing modern science, would be well advised to also recognize the healing effects of religion's admonition to acknowledge and respect the wisdom of nature. PMID:12728942

Guinan, Patrick

2002-01-01

215

NATURAL RESOURCES ASSESSMENT  

SciTech Connect

The purpose of this report is to summarize the scientific work that was performed to evaluate and assess the occurrence and economic potential of natural resources within the geologic setting of the Yucca Mountain area. The extent of the regional areas of investigation for each commodity differs and those areas are described in more detail in the major subsections of this report. Natural resource assessments have focused on an area defined as the ''conceptual controlled area'' because of the requirements contained in the U.S. Nuclear Regulatory Commission Regulation, 10 CFR Part 60, to define long-term boundaries for potential radionuclide releases. New requirements (proposed 10 CFR Part 63 [Dyer 1999]) have obviated the need for defining such an area. However, for the purposes of this report, the area being discussed, in most cases, is the previously defined ''conceptual controlled area'', now renamed the ''natural resources site study area'' for this report (shown on Figure 1). Resource potential can be difficult to assess because it is dependent upon many factors, including economics (demand, supply, cost), the potential discovery of new uses for resources, or the potential discovery of synthetics to replace natural resource use. The evaluations summarized are based on present-day use and economic potential of the resources. The objective of this report is to summarize the existing reports and information for the Yucca Mountain area on: (1) Metallic mineral and mined energy resources (such as gold, silver, etc., including uranium); (2) Industrial rocks and minerals (such as sand, gravel, building stone, etc.); (3) Hydrocarbons (including oil, natural gas, tar sands, oil shales, and coal); and (4) Geothermal resources. Groundwater is present at the Yucca Mountain site at depths ranging from 500 to 750 m (about 1,600 to 2,500 ft) below the ground surface. Groundwater resources are not discussed in this report, but are planned to be included in the hydrology section of future revisions of the ''Yucca Mountain Site Description'' (CRWMS M&O 2000c).

D.F. Fenster

2000-12-11

216

Natural and accelerated bioremediation research program plan  

SciTech Connect

This draft plan describes a ten-year program to develop the scientific understanding needed to harness and develop natural and enhanced biogeochemical processes to bioremediate contaminated soils, sediments and groundwater at DOE facilities. The Office of Health and Environmental Research (OHER) developed this program plan, with advice and assistance from DOE`s Office of Environmental Management (EM). The program builds on OHER`s tradition of sponsoring fundamental research in the life and environmental sciences and was motivated by OHER`s and Office of Energy Research`s (OER`s) commitment to supporting DOE`s environmental management mission and the belief that bioremediation is an important part of the solution to DOE`s environmental problems.

NONE

1995-09-01

217

Nature of Light  

NSDL National Science Digital Library

Overview: The Nature of Light SciPack explains the concept of light as electromagnetic radiation and as waves. It covers the electromagnetic spectrum and the effects of wavelength on the interaction of light with different materials, including some examples of phenomena that can be explained by differences in wavelength. It also covers electromagnetic waves as a form of energy. It does not address the ray model of light or optics. In addition to comprehensive inquiry-based learning materials tied to Science Education Standards and Benchmarks, the SciPack includes the following additional components: Pedagogical Implications section addressing common misconceptions, teaching resources and strand maps linking grade band appropriate content to standards. Access to one-on-one support via e-mail to content "Wizards". Final Assessment which can be used to certify mastery of the concepts. Learning Outcomes: Nature of Light: Characteristics of Light Trace a light ray as it hits a smooth reflecting surface, or, choose the correct path among given options. Predict the path of a light ray as it passes through a series of transparent materials (given the index of refraction of each material). Describe the behavior of light waves as they are diffract (or bend) around corners. Recognize examples of phenomena in your environment that are caused by the diffraction or interference of waves (the fact that you can hear someone around a corner, the behavior of water waves, light through diffraction grating). Nature of Light: Light As Waves Provide examples of energy transfer by light (such as tanning, light warming a surface, solar cells, etc.) Describe the characteristics of transverse waves and explain how waves transfer energy from place to place. Describe the relationship between the wavelength and frequency of light waves. Explain how electromagnetic waves are produced either in nature or by humans. Identify the various parts of the electromagnetic spectrum, and place them in order of increasing or decreasing wavelength. Determine the behavior of two light waves that interfere with one another. Nature of Light: Light and Color Describe the relationship of color as perceived by the human eye and the wavelength of light waves. Describe the relationship of the colors in the visible spectrum (as perceived by the human eye) to the electromagnetic spectrum. Describe how the color of a beam of light is affected by scattering. Summarize the interaction of the molecules of greenhouse gases and different wavelengths of light, and how that results in heat being trapped in the troposphere. Nature of Light: So, What Is Light? Describe the circumstances (experiments, real world situations) in which the behavior of light is best described as a wave or a particle. Describe the relationship between the frequency of a photon and its energy. Explain how a unique series of spectral lines are formed for an element (an atom or a group of free atoms of that element). Describe how spectra can be used to identify substances.

National Science Teachers Association (NSTA)

2009-05-01

218

Nature Inspired Surface Coatings  

NASA Astrophysics Data System (ADS)

Materials Scientists more and more are looking to nature for clues on how to create highly functional surface coatings with exceptional properties. The fog harvesting capabilities of the Namib Desert beetle, the beautiful iridescent colors of the hummingbird, and the super water repellant abilities of the Lotus leaf are but a few examples of the amazing properties developed over many years in the natural world. Nature also makes extensive use of the pH-dependent behavior of weak functional groups such as carboxylic acid and amine functional groups. This presentation will explore synthetic mimics to the nano- and microstructures responsible for these fascinating properties. For example, we have demonstrated a pH-induced porosity transition that can be used to create porous films with pore sizes that are tunable from the nanometer scale to the multiple micron scale. The pores of these films, either nano- or micropores, can be reversibly opened and closed by changes in solution pH. The ability to engineer pH-gated porosity transitions in heterostructured thin films has led to the demonstration of broadband anti-reflection coatings that mimic the anti-reflection properties of the moth eye and pH-tunable Bragg reflectors with a structure and function similar to that found in hummingbird wings and the Longhorn beetle. In addition, the highly textured honeycomb-like surfaces created by the formation of micron-scale pores are ideally suited for the creation of superhydrophobic surfaces that mimic the behavior of the self-cleaning lotus leaf. The development of synthetic "backbacks" on immune system cells that may one day ferry drugs to disease sites will also be discussed.

Rubner, Michael

2011-04-01

219

EM Radiation Program  

NSDL National Science Digital Library

The EM Radiation program displays the electric field vectors (in the x-y plane) and magnetic field contours (for the field in the z direction) calculated from the Lienard-Wiechert potentials for a charged particle. The default scenario shows the resulting radiation from a charged particle in simple harmonic motion. Additional particle trajectories can be specified using the Display | Switch GUI menu item. EM Radiation is an Open Source Physics program written for the teaching of electromagnetism. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the em_radiation.jar file will run the program if Java is installed. Other electromagnetism programs are also available. They can be found by searching ComPADRE for Open Source Physics, OSP, or electromagnetism.

Christian, Wolfgang

2008-05-20

220

Artificial nature : water infrastructure and its experience as natural space  

E-print Network

This work is about water infrastructure and its experience as urban and natural space. It deals with the concepts of nature/geography, technology, and the integral experiential space by analyzing water dams and reservoirs ...

Demirta?, Fatma Asl?han, 1970-

2000-01-01

221

Nature.com Blogs  

NSDL National Science Digital Library

This site brings together all of the blogs for the Nature Publishing Group, including discussions on public health, genetics, chemistry, and other interesting topics. First-time visitors can glance over recent meditations from British physicians on new and improved surgical operations and the Higgs-Boson particle. Visitors can read through one or all of the fifteen blogs or scroll down to the New Comments and Popular areas. In this last section, visitors can get a sense of the Most Read, Most Shared, and Most Commented items by other readers.

222

Extending cosmological natural selection  

E-print Network

The purpose of this paper is to propose an extension to Lee Smolin's hypothesis that our own universe belongs to a population of universes evolving by natural selection. Smolin's hypothesis explains why the parameters of physics possess the values we observe them to possess, but depends upon the contingent fact that the universe is a quantum relativistic universe. It is proposed that the prior existence of a quantum relativistic universe can itself be explained by postulating that a process of cosmogenic drift evolves universes towards stable ('rigid') mathematical structures.

Gordon McCabe

2006-10-05

223

Patterns in Nature  

NSDL National Science Digital Library

This page is a companion to the Exploring Patterns in Nature Curriculum Guides (see related pages) developed by the Center for Polymer Studies. It represents several basic Java Applets which illustrate basic concepts in statistical mechanics and fractals. Note that these programs do not necessarily match the software instructions in our curriculum guides. The guides were written to correspond to standalone software developed in the early 1990s. Since Apple Macintosh computers were most popular in schools at the time, we developed for that platform. Those programs were all Mac System 7 compatible and obviously are not OS X compatible. We have plans to breathe new life into these programs and curriculum.

Mcgath, Gary; Trunfio, Paul

2008-12-31

224

Marine natural products.  

PubMed

This review covers the literature published in 2011 for marine natural products, with 870 citations (558 for the period January to December 2011) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1152 for 2011), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included. PMID:23263727

Blunt, John W; Copp, Brent R; Keyzers, Robert A; Munro, Murray H G; Prinsep, Michèle R

2013-02-01

225

Marine natural products.  

PubMed

This review covers the literature published in 2012 for marine natural products, with 1035 citations (673 for the period January to December 2012) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1241 for 2012), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included. PMID:24389707

Blunt, John W; Copp, Brent R; Keyzers, Robert A; Munro, Murray H G; Prinsep, Michèle R

2014-01-17

226

NatureServe  

NSDL National Science Digital Library

A product of the Association for Biodiversity Information and the Natural Heritage Network, this site offers conservation information on more than 50,000 plants, animals, and ecological communities of the United States and Canada. Users can keyword-search the database for plants and animals or ecological communities or browse by group. Search options for both categories include common or scientific name (or either), location, and conservation status. Search returns contain conservation status, distribution, and links to detailed reports (summary, conservation, distribution, comprehensive). Information about the data used at the site and a glossary are also provided. A fine resource for students and researchers in wildlife ecology and conservation.

227

The Nature of Salt  

NSDL National Science Digital Library

This is a hands-on lab activity about the composition of salt. Learners will explain the general relationship between an element's Periodic Table Group Number and its tendency to gain or lose electron(s), and explain the difference between molecular compounds and ionic compounds. They will then use household materials to build a model to demonstrate sodium chloride's cubic form and describe the nature of the electrostatic attraction that holds the structure of salt together. Background information, common preconceptions, a glossary and more is included. This activity is part of the Aquarius Hands-on Laboratory Activities.

228

The nature of sleep.  

PubMed

Normal human sleep is often described as a state of reduced activity and reactivity, a kind of low general vigilance. Despite decades of intense scrutiny, our understanding of natural sleep is still incomplete. The two fundamental stages of sleep, nonrapid eye movement (NREM) and rapid eye movement (REM), are present in man as well as animals. Problems with sleep are frequent complaints of modern man, and a variety of these complaints are explored. Cognizance of the essence of normal human sleep may facilitate the anesthetist's understanding of pharmacologically induced sleep. PMID:2180245

Biddle, C; Oaster, T R

1990-02-01

229

Home > News & Events Seeking the Nature of Nature  

E-print Network

Home > News & Events Seeking the Nature of Nature Courtesy of Texas A&M University Division been at the center of media attention ever since. In 2005 the experimental collider high energy group jets of particles were produced. LEAD COLLISON MUON FIREWORKS PARTICLE JETS 4/9/2011 Seeking the Nature

Toback, David

230

Characterization of natural fiber surfaces and natural fiber composites  

Microsoft Academic Search

Experiments have been performed to further the development of natural fiber reinforced composites as a replacement for glass fiber composites. Untreated and treated surfaces of natural fibers were characterized using FTIR, XPS, and ESEM. Changes in the peaks in the FTIR spectrum at 1730, 1625 and 1239cm?1 indicated that the alkali treatment removes hemicellulose and lignin from natural fiber surfaces.

N. Sgriccia; M. C. Hawley; M. Misra

2008-01-01

231

Naturally acquired microchimerism  

PubMed Central

Bi-directional transplacental trafficking occurs routinely during the course of normal pregnancy, from fetus to mother and from mother to fetus. In addition to a variety of cell-free substances, it is now well recognized that some cells are also exchanged. Microchimerism refers to a small number of cells (or DNA) harbored by one individual that originated in a genetically different individual. While microchimerism can be the result of iatrogenic interventions such as transplantation or transfusion, by far the most common source is naturally acquired microchimerism from maternal-fetal trafficking during pregnancy. Microchimerism is a subject of much current interest for a number of reasons. During pregnancy, fetal microchimerism can be sought from the mother’s blood for the purpose of prenatal diagnosis. Moreover, studies of fetal microchimerism during pregnancy may offer insight into complications of pregnancy, such as preeclampsia, as well as insights into the pathogenesis of autoimmune diseases such as rheumatoid arthritis which usually ameliorates during pregnancy. Furthermore, it is now known that microchimerism persists decades later, both fetal microchimerism in women who have been pregnant and maternal microchimerism in her progeny. Investigation of the long-term consequences of fetal and maternal microchimerism is another exciting frontier of active study, with initial results pointing both to adverse and beneficial effects. This review will provide an overview of microchimerism during pregnancy and of current knowledge regarding long-term effects of naturally acquired fetal and maternal microchimerism. PMID:19924635

GAMMILL, HILARY S.; NELSON, J. LEE

2010-01-01

232

3D Inversion of Natural Source Electromagnetics  

NASA Astrophysics Data System (ADS)

The superior depth of investigation of natural source electromagnetic techniques makes these methods excellent candidates for crustal studies as well as for mining and hydrocarbon exploration. The traditional natural source method, the magnetotelluric (MT) technique, has practical limitations because the surveys are costly and time consuming due to the labor intensive nature of ground based surveys. In an effort to continue to use the penetration advantage of natural sources, it has long been recognized that tipper data, the ratio of the local vertical magnetic field to the horizontal magnetic field, provide information about 3D electrical conductivity structure. It was this understanding that prompted the development of AFMAG (Audio Frequency Magnetics) and recently the new airborne Z-Axis Tipper Electromagnetic Technique (ZTEM). In ZTEM, the vertical component of the magnetic field is recorded above the entire survey area, while the horizontal fields are recorded at a ground-based reference station. MT processing techniques yield frequency domain transfer functions typically between 30-720 Hz that relate the vertical fields over the survey area to the horizontal fields at the reference station. The result is a cost effective procedure for collecting natural source EM data and for finding large scale targets at moderate depths. It is well known however that 1D layered structures produce zero vertical magnetic fields and thus ZTEM data cannot recover such background conductivities. This is in sharp contrast to the MT technique where electric fields are measured and a 1D background conductivity can be recovered from the off diagonal elements of the impedance tensor. While 1D models produce no vertical fields, two and three dimensional structures will produce anomalous currents and a ZTEM response. For such models the background conductivity structure does affect the data. In general however, the ZTEM data have weak sensitivity to the background conductivity and while we show that it is possible to obtain the background structure by inverting the ZTEM data alone, it is desirable to obtain robust background conductivity information from other sources. This information could come from a priori geologic and petrophysical information or from additional geophysical data such as MT. To counter the costly nature of large MT surveys and the limited sensitivity of the ZTEM technique to the background conductivity we show that an effective method is to collect and invert both MT and ZTEM data. A sparse MT survey grid can gather information about the background conductivity and deep structures while keeping the survey costs affordable. Higher spatial resolution at moderate depths can be obtained by flying multiple lines of ZTEM data.

Holtham, E. M.; Oldenburg, D. W.

2010-12-01

233

Scottish Natural Heritage Protecting Scotland's  

E-print Network

Scottish Natural Heritage Protecting Scotland's red squirrels The consultation response #12;Protecting Scotland's red squirrels: the consultation response Contents Section Page 1. Introduction 1 2) Green - current Contact Protecting Scotland's Red Squirrels Consultation Scottish Natural Heritage

234

Natural gas monthly, December 1995  

SciTech Connect

This report presents information of interest to organizations associated with the natural gas industry. Data are presented on natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also included.

NONE

1995-12-01

235

Natural ventilation generates building form  

E-print Network

Natural ventilation is an efficient design strategy for thermal comfort in hot and humid climates. The building forms can generate different pressures and temperatures to induce natural ventilation. This thesis develops a ...

Chen, Shaw-Bing

1996-01-01

236

Natural Gas Exports from Iran  

EIA Publications

This assessment of the natural gas sector in Iran, with a focus on Iran’s natural gas exports, was prepared pursuant to section 505 (a) of the Iran Threat Reduction and Syria Human Rights Act of 2012 (Public Law No: 112-158). As requested, it includes: (1) an assessment of exports of natural gas from Iran; (2) an identification of the countries that purchase the most natural gas from Iran; (3) an assessment of alternative supplies of natural gas available to those countries; (4) an assessment of the impact a reduction in exports of natural gas from Iran would have on global natural gas supplies and the price of natural gas, especially in countries identified under number (2); and (5) such other information as the Administrator considers appropriate.

2012-01-01

237

Natural gas monthly, July 1994  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1994-07-20

238

Natural gas monthly, September 1995  

SciTech Connect

The (NGM) Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

NONE

1995-09-27

239

Natural gas monthly, April 1995  

SciTech Connect

The Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. 6 figs., 31 tabs.

NONE

1995-04-27

240

Natural gas monthly, August 1994  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1994-08-24

241

Natural gas monthly, July 1993  

SciTech Connect

The Natural Gas Monthly NGM highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1993-07-27

242

Natural gas monthly, May 1999  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time the NGM features articles designed to assist readers in using and interpreting natural gas information. 6 figs., 27 tabs.

NONE

1999-05-01

243

Natural gas monthly, November 1995  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

NONE

1995-12-05

244

Natural gas monthly: December 1993  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. Articles are included which are designed to assist readers in using and interpreting natural gas information.

Not Available

1993-12-01

245

Natural gas monthly, June 1993  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1993-06-22

246

Natural gas monthly, June 1998  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. 6 figs., 27 tabs.

NONE

1998-06-01

247

Natural gas monthly, February 1999  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. 6 figs., 28 tabs.

NONE

1999-02-01

248

Children's Moral Relationships with Nature.  

ERIC Educational Resources Information Center

Two studies of the development of children's moral relationships with nature addressed such questions as: (1) What does it mean to say that we have an obligation not to harm the natural environment? (2) Does the natural environment feel pain? (3) Does it have rights? or (4) Is moral obligation an inappropriate construct by which to understand the…

Kahn, Peter H., Jr.; McCoy, Ann

249

Argonne National Laboratory's Natural Convection  

E-print Network

Argonne National Laboratory's Natural Convection Shutdown Heat Removal Test Facility #12;Scaling Basis Full Scale Half Scale NSTF ArgonneNationalLaboratory's NaturalConvection will incorporate passive safety systems, many in the form of natural circulation loops, to ensure safe and long

Kemner, Ken

250

Nature Publishing Group Site Licenses  

E-print Network

APS (Acta Pharmacologica Sinica) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British SITE LICENSES Nature Publishing Group L'excellence scientifique et médicale Palgrave Macmillan Journals.nature.com/libraries #12;Nature Publishing Group The American Journal of Gastroenterology American Journal of Hypertension

Cai, Long

251

Nature Publishing Group Site Licenses  

E-print Network

(British Dental Journal) BJC (British Journal of Cancer) Bone Marrow Transplantation Cancer Gene Therapy SITE LICENSES Nature Publishing Group Bilimsel ve tibbi mükemmeliyet Palgrave Macmillan Journals Sosyal düzeyleri Esnek içerik www.nature.com/libraries #12;Nature Publishing Group The American Journal

Cai, Long

252

Nature Publishing Group Site Licenses  

E-print Network

APS (Acta Pharmacologica Sinica) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British SITE LICENSES Nature Publishing Group Excelencia científica y médica Palgrave Macmillan Journals Las.nature.com/libraries #12;Nature Publishing Group The American Journal of Gastroenterology American Journal of Hypertension

Cai, Long

253

wind engineering & natural disaster mitigation  

E-print Network

wind engineering & natural disaster mitigation #12;wind engineering & natural disaster mitigation Investment WindEEE Dome at Advanced Manufacturing Park $31million Insurance Research Lab for Better Homes $8million Advanced Facility for Avian Research $9million #12;wind engineering & natural disaster mitigation

Denham, Graham

254

estry & Natural Resour PURDUE UNIVERSITY  

E-print Network

For estry & Natural Resour ces PURDUE UNIVERSITY FNR-186 Purdue University - Forestry and Natural, Department of Forestry and Natural Resources, Purdue University A Landowner's Guide to Sustainable Forestry the 18th century (Beyfuss 1999a). It, along with other native forest herbs like goldenseal (yellow root

255

warnell school Forestry & Natural Resources  

E-print Network

warnell school Forestry & Natural Resources 2010 Annual Report o #12;VisionTo be recognized as one of the top five forestry and natural resource programs in the United States. MissionTo prepare resources; and to place latest ideas and technology in forestry and natural resource management into real

Hall, Daniel

256

Method of dehydrating natural gas  

Microsoft Academic Search

A method for dehydration of natural gas is provided wherein well head gas is supplied to a three-phase inlet separator, the vapor mixture of natural gas and water removed from that inlet separator means is supplied to a turboexpander, and the resulting refrigerated mixture of natural gas and condensed water vapor is supplied to a multi-phase outlet separator. The turboexpander

1985-01-01

257

Natural Resource Opportunities for Landowners  

E-print Network

Natural Resource Opportunities for Landowners A Southern Regional Webinar Series SESSION DETAILS & REGISTRATION http://www.clemson.edu/extension/natural_resources/continuing_education/nrol/ COST $100 for all 5 November 8 Introduction to Natural Resource Conservation What you need to know about your land

Teskey, Robert O.

258

Forecasting Residential Natural Gas Demand  

Microsoft Academic Search

In Turkey, the major purpose of natural gas demand in residences is heating, where the residential gas usage is approximately 18% of total gas consumption. The studies on forecasting gas demand for future periods have a great importance because natural gas is an imported energy source. This article describes an approach to obtain appropriate models for forecasting residential monthly natural

HAYDAR ARAS; NIL ARAS

2004-01-01

259

US crude oil, natural gas, and natural gas liquids reserves  

SciTech Connect

This report presents estimates of proved reserves of crude oil, natural gas, and natural gas liquids as of December 31, 1989, and production volumes for the year 1989 for the total United States and for selected states and state sub-divisions. Estimates are presented for the following four categories of natural gas: total gas (wet after lease separation), its two major components (nonassociated and associated-dissolved gas), and total dry gas (wet gas adjusted for the removal of liquids at natural gas processing plants). In addition, two components of natural gas liquids, lease condensate and natural gas plant liquids, have their reserves and production reported separately. Also included is information on indicated additional crude oil reserves and crude oil, natural gas, and lease condensate reserves in nonproducing reservoirs. 28 refs., 9 figs., 15 tabs.

Not Available

1990-10-05

260

New probe of naturalness.  

PubMed

Any new scalar fields that perturbatively solve the hierarchy problem by stabilizing the Higgs boson mass also generate new contributions to the Higgs boson field-strength renormalization, irrespective of their gauge representation. These new contributions are physical, and in explicit models their magnitude can be inferred from the requirement of quadratic divergence cancellation; hence, they are directly related to the resolution of the hierarchy problem. Upon canonically normalizing the Higgs field, these new contributions lead to modifications of Higgs couplings that are typically great enough that the hierarchy problem and the concept of electroweak naturalness can be probed thoroughly within a precision Higgs boson program. Specifically, at a lepton collider this can be achieved through precision measurements of the Higgs boson associated production cross section. This would lead to indirect constraints on perturbative solutions to the hierarchy problem in the broadest sense, even if the relevant new fields are gauge singlets. PMID:24093250

Craig, Nathaniel; Englert, Christoph; McCullough, Matthew

2013-09-20

261

Nature: Katrina's Animal Rescue  

NSDL National Science Digital Library

There have been many stories that have come out in the aftermath of Hurricane Katrina, and most of them have dealt with the human tragedies involved in this traumatic set of events. The people at the long-running PBS series, Nature, have created this website to complement a recent edition of the show that offered some insights into the effects the hurricane had on the animal population of Louisiana. On the site, visitors can take advantage of a number of special interactive features. These features allow visitors to ask questions of those involved in the animal rescue efforts and learn about the psychological and physical effects on animals. The site also contains a section where visitors can learn about other web-based resources, such as the homepages for Animal Rescue New Orleans and the Best Friends Animal Society.

2005-01-01

262

Natural Radioactivity in Bananas  

SciTech Connect

The content of {sup 40}K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, Sao Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself and also soil without fertilizer for comparison. We have used the gamma-ray spectroscopy technique with a NaI(T1) crystal inside a 12 cm thick lead shield to detect the gamma-radiation. The results indicate that only part of the available potassium is absorbed by the plant, which is mainly concentrated in the banana peel.

Zagatto, V. A. B.; Medina, N. H.; Okuno, E.; Umisedo, N. K. [Instituto de Fisica da Universidade de Sao Paulo (Brazil)

2008-08-07

263

Natural Selection: Unit Introduction  

NSDL National Science Digital Library

This lesson provides an overview for a unit on natural selection. As part of the introduction to the unit, students will have a chance to participate in a discussion around their ideas about evolution. They will also be given information about the goals and expectations for the unit, both in terms of the topics covered and the kinds of work that will be expected from them. Finally, they will be asked to complete a written assignment that will help them and the teacher determine some of the ideas they already have about how evolution operates. Students will prepare a written explanation for a change in shell morphology observed between two subspecies of Galapagos Island tortoises. The site also includes instructional notes for the teacher and a student handout with an introduction to the unit.

264

Natural flexible dermal armor.  

PubMed

Fish, reptiles, and mammals can possess flexible dermal armor for protection. Here we seek to find the means by which Nature derives its protection by examining the scales from several fish (Atractosteus spatula, Arapaima gigas, Polypterus senegalus, Morone saxatilis, Cyprinius carpio), and osteoderms from armadillos, alligators, and leatherback turtles. Dermal armor has clearly been developed by convergent evolution in these different species. In general, it has a hierarchical structure with collagen fibers joining more rigid units (scales or osteoderms), thereby increasing flexibility without significantly sacrificing strength, in contrast to rigid monolithic mineral composites. These dermal structures are also multifunctional, with hydrodynamic drag (in fish), coloration for camouflage or intraspecies recognition, temperature and fluid regulation being other important functions. The understanding of such flexible dermal armor is important as it may provide a basis for new synthetic, yet bioinspired, armor materials. PMID:23161399

Yang, Wen; Chen, Irene H; Gludovatz, Bernd; Zimmermann, Elizabeth A; Ritchie, Robert O; Meyers, Marc A

2013-01-01

265

NATURE: Hippo Beach  

NSDL National Science Digital Library

This website is the online companion to Hippo Beach, which recently aired on the PBS series NATURE. And as the website explains, "from the study of hippos' essential relationships with birds to the discovery that hippos can communicate underwater, these mammals deserve a closer look." Students can get a closer look with "Sun, Sand, and Hippos," an interdisciplinary lesson plan for grades 3-5. The lesson guides students in researching and creating presentations on hippos and helpful weblinks, worksheets, and a teacher's guide are provided. The website contains other special features as well, including video clips from the program, multimedia activities, informative essays, and more. [RS] This site is also reviewed in the November 14, 2003 NSDL Life Sciences Report.

266

NATURE: Horse and Rider  

NSDL National Science Digital Library

This Web site is the online companion to the recent PBS NATURE documentary "Horse and Rider," which "explores a fascinating partnership between animal and human." Click on For Teachers on the main Web page to find an interdisciplinary lesson plan for grades 9-12. The lesson, titled Creating the "Perfect" Horse, has students study horse biology and behavior, explore the reasons why different horse breeds were developed, and analyze research findings to determine if breeding an all-purpose horse is practical or even possible. The lesson plan provides downloadable worksheets, and the main Web page contains some fun special features, including video clips. This site is also reviewed in the September 19, 2003 NSDL Life Sciences Report.

267

Nature . . . an environmental yardstick  

USGS Publications Warehouse

To one who has spent his professional career in geologic science, conservation always has had special meaning. In the measurements so necessary to his work the geologist develops an integrity in the use of numbers and in the qualifications attending the validity of numbers. Scientific analysis of geologic events and sequence develops a keen sense of what is coincidental, correlative, and consequential. The geologist applies his science in evaluating hazards to man as natural catastrophes and/or benefits to man such as earth materials that form the resource base of his society. But more than these the geologist has acquired a deep appreciation for the planet as a whole, its inner structure, its landscape, and the living things that abound.

Pecora, William T.

1976-01-01

268

Natural Radioactivity in Bananas  

NASA Astrophysics Data System (ADS)

The content of 40K natural radionuclide in bananas (Musa sapientum) from the Vale do Ribeira region, São Paulo, Brazil, has been measured. We have collected several samples of bananas prata and nanica, its peels, leaves, and also different soils where the banana tree was planted, such as soil with a standard amount of fertilizer, the fertilizer itself and also soil without fertilizer for comparison. We have used the gamma-ray spectroscopy technique with a NaI(T1) crystal inside a 12 cm thick lead shield to detect the gamma-radiation. The results indicate that only part of the available potassium is absorbed by the plant, which is mainly concentrated in the banana peel.

Zagatto, V. A. B.; Medina, N. H.; Okuno, E.; Umisedo, N. K.

2008-08-01

269

letters to nature 568 NATURE |VOL 411 |31 MAY 2001 |www.nature.com  

E-print Network

, F. Natural bond orbital analysis of internal rotation barriers and related phenomena. Isr. J. Chem. & Weinhold, F. Natural bond orbital analysis of steric interactions. J. Chem. Phys. 107, 5406±5421 (1997). 20

Rempel, Alan W.

270

Natural gas monthly, November 1996  

SciTech Connect

The report highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the Natural Gas Monthly features articles designed to assist readers in using and interpreting natural gas information. The feature article this month is ``US natural gas imports and exports-1995``. 6 figs., 24 tabs.

NONE

1996-11-01

271

Natural gas monthly, March 1994  

SciTech Connect

The Natural Gas Monthly (NGM) is prepared in the Data Operations Branch of the Reserves and Natural Gas Division, Office of Oil and Gas, Energy Information Administration (EIA), US Department of energy (DOE). The NGM highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1994-03-22

272

Natural gas monthly, August 1993  

SciTech Connect

The Natural Gas Monthly (NGM) is prepared in the Data Operations Branch of the Reserves and Natural Gas Division, Office of Oil and Gas, Energy Information Administration (EIA), US Department of Energy (DOE). The NGM highhghts activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1993-08-25

273

Natural gas monthly, May 1994  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The featured articles for this month are: Opportunities with fuel cells, and revisions to monthly natural gas data.

Not Available

1994-05-25

274

Natural gas monthly, August 1995  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. This month`s feature article is on US Natural Gas Imports and Exports 1994.

NONE

1995-08-24

275

Natural gas monthly, April 1997  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are present3ed each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The feature article is entitled ``Natural gas pipeline and system expansions.`` 6 figs., 27 tabs.

NONE

1997-04-01

276

Heat distribution by natural convection  

SciTech Connect

Natural convection can provide adequate heat distribution in many situtations that arise in buildings. This is appropriate, for example, in passive solar buildings where some rooms tend to be more strongly solar heated than others or to reduce the number of heating units required in a building. Natural airflow and heat transport through doorways and other internal building apertures is predictable and can be accounted for in the design. The nature of natural convection is described, and a design chart is presented appropriate to a simple, single-doorway situation. Natural convective loops that can occur in buildings are described and a few design guidelines are presented.

Balcomb, J.D.

1985-01-01

277

Natural gas monthly, May 1997  

SciTech Connect

The Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The feature article this month is ``Restructuring energy industries: Lessons from natural gas.`` 6 figs., 26 tabs.

NONE

1997-05-01

278

Natural gas monthly, December 1997  

SciTech Connect

The Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The article this month is entitled ``Recent Trends in Natural Gas Spot Prices.`` 6 figs., 27 tabs.

NONE

1997-12-01

279

Natural gas monthly, June 1996  

SciTech Connect

The natural gas monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The feature article for this month is Natural Gas Industry Restructuring and EIA Data Collection.

NONE

1996-06-24

280

Natural gas monthly, March 1997  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The feature article is entitled ``Natural gas analysis and geographic information systems.`` 6 figs., 27 tabs.

NONE

1997-03-01

281

autumn books NATURE|VOL425|23OCTOBER2003|www.nature.com/nature 769  

E-print Network

autumn books NATURE|VOL425|23OCTOBER2003|www.nature.com/nature 769 capacities. These capacities points out, it is unclear how quickly children identifysuchrules. Tomasello presents a wealth of obser on constructions in syntax, and to psychological research on children's under- standing of intentions and beliefs

Alvarez, Nadir

282

96 NATURE|VOL427|8JANUARY2004|www.nature.com/nature Automatic archaeology  

E-print Network

96 NATURE|VOL427|8JANUARY2004|www.nature.com/nature Automatic archaeology Digging in the dirt and an archaeological hobbyist -- celebrated his sixtieth birthday three years ago. On that day he took his entire to the profession of archaeology," he says. With that goal in mind, Smilansky was directed to Ilan Sharon

Smilansky, Uzy

283

The EM Earthquake Precursor  

NASA Astrophysics Data System (ADS)

Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After the 1989 Loma Prieta Earthquake, American earthquake investigators predetermined magnetometer use and a minimum earthquake magnitude necessary for EM detection. This action was set in motion, due to the extensive damage incurred and public outrage concerning earthquake forecasting; however, the magnetometers employed, grounded or buried, are completely subject to static and electric fields and have yet to correlate to an identifiable precursor. Secondly, there is neither a networked array for finding any epicentral locations, nor have there been any attempts to find even one. This methodology needs dismissal, because it is overly complicated, subject to continuous change, and provides no response time. As for the minimum magnitude threshold, which was set at M5, this is simply higher than what modern technological advances have gained. Detection can now be achieved at approximately M1, which greatly improves forecasting chances. A propagating precursor has now been detected in both the field and laboratory. Field antenna testing conducted outside the NE Texas town of Timpson in February, 2013, detected three strong EM sources along with numerous weaker signals. The antenna had mobility, and observations were noted for recurrence, duration, and frequency response. Next, two directional techniques were employed, resulting in three mapped, potential epicenters. The remaining, weaker signals presented similar directionality results to more epicentral locations. In addition, the directional results of the Timpson field tests lead to the design and construction of a third prototype antenna. In a laboratory setting, experiments were created to fail igneous rock types within a custom-designed Faraday Cage. An antenna emplaced within the cage detected EM emissions, which were both reproducible and distinct, and the laboratory results paralleled field results. With a viable system and continuous monitoring, a fracture cycle could be established and observed in real-time. Sequentially, field data would be reviewed quickly for assessment; thus, leading to a much improved earthquake forecasting capability. The EM precursor determined by this method may surpass all prior precursor claims, and the general public will finally receive long overdue forecasting.

Jones, K. B., II; Saxton, P. T.

2013-12-01

284

Natural farming in Louisiana  

SciTech Connect

This project evaluates the possibility of producing rice and winter grain on the Gulf Coast of Louisiana using very little or no fossil fuel inputs. Radically different natural farming techniques pioneered in Japan were used to establish a continuous yearly cycle of rice, wheat and clover culture with human labor substituted where possible for mineral fuel dependent inputs. An examination of energy flows in food producing systems generally forms the theoretical framework for a discussion and comparison of particular agricultural systems. The components of a complete yearly cycle of farming practices were carried out experimentally, observed, and evaluated. Several varieties of wheat and cover crops were planted in the fall and harvested in the spring, several varieties of rice were broadcast no-till, irrigated, weeded, harvested and milled, and measurements and observation of stand, weeds, insects, disease, nutrients, and harvesting and milling methods were made and discussed. Human labor inputs were recorded and an economic and energetic evaluation of the overall method was made.

Hair, M.

1983-03-31

285

Natural gas conversion process  

SciTech Connect

The experimental apparatus was dismantled and transferred to a laboratory space provided by Lawrence Berkeley Laboratory (LBL) which is already equipped with a high-ventilation fume hood. This will enable us to make tests at higher gas flow rates in a safe environment. Three papers presented at the ACS meeting in San Francisco (Symposium on Natural Gas Upgrading II) April 5--10, 1992 show that the goal of direct catalytic conversion of Methane into heavier Hydrocarbons in a reducing atmosphere is actively pursued in three other different laboratories. There are similarities in their general concept with our own approach, but the temperature range of the experiments reported in these recent papers is much lower and this leads to uneconomic conversion rates. This illustrates the advantages of Methane activation by a Hydrogen plasma to reach commercial conversion rates. A preliminary process flow diagram was established for the Integrated Process, which was outlined in the previous Quarterly Report. The flow diagram also includes all the required auxiliary facilities for product separation and recycle of the unconverted feed as well as for the preparation and compression of the Syngas by-product.

Not Available

1992-01-01

286

Nature's design of nanomotors.  

PubMed

The need for movement is an essential concept of all living organisms. On a macroscopic scale, animals and microbes have to be able to move towards food and away from poison and predators. Plants turn their leaves toward their energy source, the sunlight. But even on a molecular scale, movement is essential for life. It has been known for a long time that enzymes and proteins undergo large conformational changes while performing their biological tasks. The catalytically active regions of enzymes need to sequentially open to bind their respective substrates and close to allow the specific chemical reaction to occur in a defined chemical environment. The active sites finally open up again up to allow the product to be released. Molecular motors are proteins and protein complexes that have evolved in living cells to carry out a variety of functions essential for survival, reproduction and differentiation of the cells and organisms. They use chemical, electrochemical or potential energy and transduce that energy into physical, chemical or mechanical force. In this paper we review some of the molecular motors that were designed by nature to either perform physical work or that contain motor-like movements as part of their catalytic mechanism. PMID:15939237

Vogel, Pia D

2005-07-01

287

Freedom in nature  

NASA Astrophysics Data System (ADS)

The paper starts with the proposal that the cause of the apparent insolubility of the free-will problem are several popular but strongly metaphysical notions and hypotheses. To reduce the metaphysics, some ideas are borrowed from physics. A concept of event causality is discussed. The importance of Hume’s Principle of Causality is stressed and his Principle of Causation is weakened. The key concept of the paper, the so-called relative freedom, is also suggested by physics. It is a kind of freedom that can be observed everywhere in nature. Turning to biology, incomplete knowledge is defined for all organisms. They cope with the problem by Popper’s trial and error processes. One source of their success is the relative freedom of choice from the basic option ranges: mutations, motions and neural connections. Finally, the conjecture is adopted that communicability can be used as a criterion of consciousness and free will is defined as a conscious version of relative freedom. The resulting notion is logically self-consistent and it describes an observable phenomenon that agrees with our experience.

Hájí?ek, P.

2009-09-01

288

Naturalness and supersymmetry  

SciTech Connect

In this thesis, the author argues that the supersymmetric Standard Model, while avoiding the fine tuning in electroweak symmetry breaking, requires unnaturalness/fine tuning in some (other) sector of the theory. For example, Baryon and Lepton number violating operators are allowed which lead to proton decay and flavor changing neutral currents. He studies some of the constraints from the latter in this thesis. He has to impose an R-parity for the theory to be both natural and viable. In the absence of flavor symmetries, the supersymmetry breaking masses for the squarks and sleptons lead to too large flavor changing neutral currents. He shows that two of the solutions to this problem, gauge mediation of supersymmetry breaking and making the scalars of the first two generations heavier than a few TeV, reintroduce fine tuning in electroweak symmetry breaking. He also constructs a model of low energy gauge mediation with a non-minimal messenger sector which improves the fine tuning and also generates required Higgs mass terms. He shows that this model can be derived from a Grand Unified Theory despite the non-minimal spectrum.

Agashe, K. [Lawrence Berkeley National Lab., CA (United States). Theoretical Physics Group]|[Univ. of California, Berkeley, CA (United States). Dept. of Physics

1998-05-01

289

Natural family planning.  

PubMed

It is now well accepted that a woman can conceive from an act of intercourse for a maximum of only about 7 days of her menstrual cycle. The reliability of natural family planning depends on identifying this window of fertility without ambiguity. Several symptomatic markers, cervical mucus and basal body temperature, have been used extensively and with considerable success in most women but failures occur. Ovarian and pituitary hormone production show characteristic patterns during the cycle. Urinary estrogen and pregnanediol measurements yield reliable information concerning the beginning, peak, and end of the fertile period, provided that the assays are accurate and performed on timed specimens of urine. We have developed such enzyme immunoassays for urinary estrogen and pregnanediol glucuronides that can be performed at home. In the early versions of the assays, enzyme reaction rates were measured by eye, but more recently, a simple photoelectronic rate meter has been used. The final problem to be solved is not technologic but whether women are sufficiently motivated to expend the same time and effort each day for 10 days a month, with less cost, on fertility awareness as they spend on making a cup of tea. PMID:3314524

Brown, J B; Blackwell, L F; Billings, J J; Conway, B; Cox, R I; Garrett, G; Holmes, J; Smith, M A

1987-10-01

290

Natural gas purchases  

SciTech Connect

In the 1970`s gas and boilers were like oil and water as far as policy makers were concerned, culminating in the Powerplant and Industrial Fuel Use Act (perhaps a more appropriate title would have been the Fuel Non-Use Act or the Gas Non-Use Act). But now, the last two Administrations have made gas the centerpiece of their energy and environmental strategies, including promotion of gas use for boilers and electric generation. The FERC`s Order 636 almost completes the Commission`s restructuring of the gas industry that began with Order 380 (eliminating commodity minimum bills) and progressed sharply with Orders 436 and 500. It is Order 636 that has transformed the interstate pipeline business into a transportation business, with the pipelines virtually out of the merchant business altogether because the Commission is not resting on its laurels after completing implementation of Order 636. Rather, it is exploring new ways to expand the growing competitive market for gas, including the possibility of using market-based rates for interstate pipeline transportation services. Methods for the procurement of natural gas supplies are discussed.

Grenier, E.J. Jr. [Partner, Sutherland, Asbill and Brennan, Washington, DC (United States)

1995-09-01

291

Nature, nurture, and expertise  

PubMed Central

Rather than investigating the extent to which training can improve performance under experimental conditions (‘what could be’), we ask about the origins of expertise as it exists in the world (‘what is’). We used the twin method to investigate the genetic and environmental origins of exceptional performance in reading, a skill that is a major focus of educational training in the early school years. Selecting reading experts as the top 5% from a sample of 10,000 12-year-old twins assessed on a battery of reading tests, three findings stand out. First, we found that genetic factors account for more than half of the difference in performance between expert and normal readers. Second, our results suggest that reading expertise is the quantitative extreme of the same genetic and environmental factors that affect reading performance for normal readers. Third, growing up in the same family and attending the same schools account for less than a fifth of the difference between expert and normal readers. We discuss implications and interpretations (‘what is inherited is DNA sequence variation’; ‘the abnormal is normal’). Finally, although there is no necessary relationship between ‘what is’ and ‘what could be’, the most far-reaching issues about the acquisition of expertise lie at the interface between them (‘the nature of nurture: from a passive model of imposed environments to an active model of shaped experience’). PMID:24948844

Plomin, Robert; Shakeshaft, Nicholas G.; McMillan, Andrew; Trzaskowski, Maciej

2014-01-01

292

Methylgermanium in natural waters  

NASA Astrophysics Data System (ADS)

Biological methylation of metallic elements1 and the occurrence and cycling of organometals in the environment have been investigated in Japan during the 1950s and 1960s, where the ingestion of fish and shellfish contaminated with methylmercury compounds caused mercury poisoning2,3. Biomethylation ability has been demonstrated in bacteria, fungi and algae for As, Cd, Hg, Pb, Se, Sn, Te and Tl4-7. Naturally-occurring methylated species have been reported in estuaries and seawater for Sb8, As9, Ge10-13 and Sn14, although recent evidence suggests that some reports of methyltin species result from interferences by Ge and volatile sulphur compounds15. With the exception of Sb8, As9,12,16 and Ge11,12, there are no consistent estuarine or oceanic profiles for methylmetal compounds in the literature from which to judge their biogeochemical behaviour. Early investigations17-19 reported that methylgermanium species do not exist in the aquatic environment. Subsequently, we identified monomethylgermanium (MMGe) and dimethylgermanium (DMGe) in estuaries10,12, the Baltic Sea11 and the Bering and Sargasso seas13. We report here recent measurements of methylgermanium compounds in river water, estuaries, seawater and anoxic basins.

Lewis, Brent L.; Froelich, Philip N.; Andreae, Meinrat O.

1985-01-01

293

Quantitation of PET data with the EM reconstruction technique  

SciTech Connect

The expectation maximization (EM) algorithm offers high spatial resolution and excellent noise reduction with low statistics PET data, since it incorporates the Poisson nature of the data. The main difficulties are long computation times, difficulties to find appropriate criteria to terminate the reconstruction and to quantify the resulting image data. In the present work a modified EM algorithm has been implements on a VAX 11/780. Its capability to quantify image data has been tested in phantom studies and in two clinical cases, cerebral blood flow studies and dopamine D2-receptor studies. Data from phantom studies indicate the superiority of images reconstructed with the EM technique compared to images reconstructed with the conventional filtered back-projection (FB) technique in areas with low statistics. At higher statistics the noise characteristics of the two techniques coincide. Clinical data support these findings.

Rosenqvist, G.; Dahlbom, M.; Erikson, L.; Bohm, C.; Blomqvist, G.

1989-02-01

294

Diffusion in natural ilmenite  

NASA Astrophysics Data System (ADS)

Diffusion rates in natural ilmenite of composition Fe0.842+ Fe0.163+Mn0.07Mg0.01Ti 0.92O3 from the Vishnevye Mountains (Urals, Russia) have been measured at 1000° C. Experiments were carried out in a one atmosphere furnace with oxygen fugacity controlled by flow of a CO-CO2 gas mixture, over a period of four hours. The diffusant source was a synthetic ilmenite (FeTiO3) powder doped with trace amounts of Mg, Co, Ni, Zr, Hf, V, Nb, Ta, Al, Cr, Ga and Y. Since, the natural ilmenite crystal contained Mn it was also possible to study diffusion of Mn from the ilmenite crystal. The experiments were analysed using the electron microprobe and scanning laser ablation ICP-MS. Diffusion profiles were measured for Al, Mg, Mn, Co, Ni, Ga, and Y. Diffusion of Cr, Hf, Zr, V, Nb and Ta was too slow to allow diffusion profiles to be accurately measured for the times and temperatures studied so far. The preliminary results show that diffusion in ilmenite is fast, with the diffusivity determined in this study on the order of 10-13 to 10-16 m2s-1. For comparison, Chakraborty (1997) found interdiffusion of Fe and Mg in olivine at 1000° C on the order of 10-17 to 10-18m2s-1 and Dieckmann (1998) found diffusivity of Fe, Mg, Co in magnetite at 1200° C to be on the order of 10-13 to 10-14 m2s-1. The order in which the diffusivity of the elements decreases is Mn > Co > Mg ? Ni > Al ? Y ? Ga, that is to say that Mn diffuses the fastest and Ga the slowest. Overall, this study intends to determine diffusion parameters such as frequency factor, activation energy and activation volume as a function of temperature and oxygen fugacity. This research is taking place in the context of a larger study focusing on the use of the garnet-ilmenite system as a geospeedometer. Examination of the consequences of simultaneous diffusion of multiple elements is a necessity if we are to develop an understanding of the crystal-chemical controls on diffusion (cf Spandler & O'Neill, in press). Chakraborty, S. (1997). Rates and mechanisms of Fe-Mg interdiffusion in olivine at 980° C -1300° C. Journal of geophysical research 102 (B6) p.12317-12331. Dieckmann, R. (1998). Point defects and transport in non-stoichiometric oxides: solved and unsolved problems. Journal of Physics and Chemistry of Solids 59 (4) p. 507-525. Spandler, C., O'Neill, H. St. C. (in press). Diffusion and partition coefficients of minor and trace elements in San Carlos olivine at 1300° C with some geochemical implications. Contributions to Mineralogy and Petrology doi: 10.1007/s00410-009-0456-8.

Stenhouse, Iona; O'Neill, Hugh; Lister, Gordon

2010-05-01

295

NATURAL GENETIC ENGINEERING AND NATURAL GENOME EDITING Epigenetic Regulation of Mammalian  

E-print Network

NATURAL GENETIC ENGINEERING AND NATURAL GENOME EDITING Epigenetic Regulation of Mammalian Genomes, and combina- tions thereof, specify various chromatin states Natural Genetic Engineering and Natural Genome

Jordan, King

296

Heat distribution by natural convection  

SciTech Connect

Natural convection can provide adequate heat distribution in many situations that arise in buildings. This is appropriate, for example, in passive solar buildings where some rooms tend to be more strongly solar heated than others. Natural convection can also be used to reduce the number of auxiliary heating units required in a building. Natural airflow and heat transport through doorways and other internal building apertures are predictable and can be accounted for in the design. The nature of natural convection is described, and a design chart is presented appropriate to a simple, single-doorway situation. Experimental results are summarized based on the monitoring of 15 passive solar buildings which employ a wide variety of geometrical configurations including natural convective loops.

Balcomb, J.D.

1985-01-01

297

Submicroscopic Nature Needs Megascience  

NASA Astrophysics Data System (ADS)

The history of ``submicroscopic nature,'' that is, the history of particle physics, begins in the early 1950's and builds on the construction of a post WWII series of particle accelerators developed to study nuclear physics had been applied to the collisions, in the earth's atmosphere, of cosmic rays. These were high energy particles generated in cosmological events and colliding with oxygen and nitrogen in our atmosphere to create new particles. These studies discovered muons, pions, kaons and lambdas---the beginnings of a vast ``zoo.'' Clearly, studies of the inhabitants of the zoo required energetic collisions, the higher the energy of the accelerator, the more extensive was the range of masses that could be produced and studied. Our paper will review the developments over the past 50 years. As accelerators grew, so did the particle detectors and the sizes of the experimental groups. This will bring us to Fermilab in 2005. Finally, we will describe the ˜900 physicist groups that are cheerfully collaborating, building particle detectors designed to peer deeply into the structure of matter, based upon the ``Large Hadron Collider'' (LHC), an accelerator of unprecedented size, cost, and complexity. The story then takes us from the 100 MeV (10^8 eV) ``atom smashers'' of 1950, to the ˜10 TeV (10^13 eV) behemoth now under construction in Europe. Thus, we move from dozens of machines often on University campuses around the world, to one single megascience device shared by physicists around the world. The motivation for this evolution is physics, as we shall attempt to explain.

Lederman, Leon

2005-04-01

298

Natural gas monthly, September 1998  

SciTech Connect

The National Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. 6 figs., 27 tabs.

NONE

1998-09-01

299

Natural gas monthly, October 1995  

SciTech Connect

The Natural Gas Monthly highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. A glossary of the terms used in this report is provided to assist readers in understanding the data presented in this publication. 6 figs., 30 tabs.

NONE

1995-10-23

300

Contaminant Removal From Natural Resources  

NASA Technical Reports Server (NTRS)

A zero-valent metal emulsion containing zero-valent metal particles is used to remediate contaminated natural resources, such as groundwater and soil. In a preferred embodiment, the zero-valent metal emulsion removes heavy metals, such as lead (pb), from contaminated natural resources. In another preferred embodiment, the zero-valent metal emulsion is a bimetallic emulsion containing zero-valent metal particles doped with a catalytic metal to remediate halogenated aromatic compounds, such as polychlorinated biphenyls (PCBs), from natural resources.

Clausen, Christian A. (Inventor); Quinn, Jacqueline W. (Inventor); Geiger, Cheri L. (Inventor); Reinhart, Debra (Inventor); Fillpek, Laura B. (Inventor); Coon, Christina (Inventor); Devor, Robert (Inventor)

2006-01-01

301

Natural gas monthly, April 1994  

SciTech Connect

The National Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1994-04-26

302

Natural gas monthly, February 1994  

SciTech Connect

The NGM highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. The NGM also features articles designed to assist readers in using and interpreting natural gas information.

Not Available

1994-02-25

303

The natural input memory model  

Microsoft Academic Search

A new recognition memory model is proposed which differs from the existing memory models in that it operates on natural input. Therefore it is called the natural input memory (N IM) model. A biologically-informed perceptual pre-processing method takes local samples from a natural image and translates these into a feature-vector representation. The feature-vector representations reside in a similarity space in

Joyca P. W. Lacroix; Jaap M. J. Murre; Eric Postma; Jaap van den Herik

2005-01-01

304

Natural gas monthly, February 1996  

SciTech Connect

The NGM highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information.

NONE

1996-03-01

305

Natural gas monthly, January 1994  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The featured article for this month is on US coalbed methane production.

Not Available

1994-02-01

306

Connection to Nature: Children's Affective Attitude toward Nature  

ERIC Educational Resources Information Center

A connection to nature index was developed and tested to measure children's affective attitude toward the natural environment. The index was employed through a survey that investigates students' attitude toward Lagoon Quest, a mandatory environmental education program for all fourth-grade, public school students in Brevard County, Florida. Factor…

Cheng, Judith Chen-Hsuan; Monroe, Martha C.

2012-01-01

307

Nature Centers and Land Trusts--Natural Partners.  

ERIC Educational Resources Information Center

The main goal of land trusts is land preservation by purchase or other means. Land trusts generally lack the personnel, funds, and expertise to take advantage of the land's potential for education, interpretation, and research. A nature center can provide the expertise to put the property to good use. Discusses trusts, nature centers, and their…

Davis, William L.; McDonald, Brook S.

1997-01-01

308

NATURE NANOTECHNOLOGY | www.nature.com/naturenanotechnology 1 SUPPLEMENTARY INFORMATION  

E-print Network

NATURE NANOTECHNOLOGY | www.nature.com/naturenanotechnology 1 SUPPLEMENTARY INFORMATION DOI: 10, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy. 4 BIONEM, Bio-Nanotechnology and Engineering for Medicine, Department of experimental and clinical medicine, University of Magna Graecia Viale

Stockman, Mark I.

309

letters to nature 172 NATURE |VOL 412 |12 JULY 2001 |www.nature.com  

E-print Network

; the surrounding insulation area was 6 mm in diameter. The ink was carefully dried in a 70 8C oven so that Ptletters to nature 172 NATURE |VOL 412 |12 JULY 2001 |www.nature.com Methods Preparation of Pt H2PtCl6, drop by drop with vigorous agitation. The amount of H2PtCl6 in the solution was varied

310

Carcinoma espinocelular cutâneo em cães.  

E-print Network

??Dissertação de Mestrado Integrado em Medicina Veterinária O Carcinoma Espinocelular (CEC) é uma neoplasia com origem nos queratinócitos e representa aproximadamente 5% das neoplasias cutâneas… (more)

Moura, Inês da Costa

2012-01-01

311

Environmentalism and Natural Aggregate Mining  

Microsoft Academic Search

Sustaining a developed economy and expanding a developing one require the use of large volumes of natural aggregate. Almost all human activity (commercial, recreational, or leisure) is transacted in or on facilities constructed from natural aggregate. In our urban and suburban worlds, we are almost totally dependent on supplies of water collected behind dams and transported through aqueducts made from

Lawrence J. Drew; William H. Langer; Janet S. Sachs

2002-01-01

312

Backpocket: Activities for Nature Study.  

ERIC Educational Resources Information Center

Leading naturalist-teachers share outdoor learning activities and techniques, including using binoculars as magnifiers, scavenger hunts, games such as "what's it called" and "I spy," insect study, guessing the age of trees by examining the bark, leading bird walks, exploring nature in the community, and enhancing nature hikes with props. (LP)

Hendry, Ian; And Others

1995-01-01

313

NATURAL EMISSIONS OF OXIDANT PRECURSORS  

EPA Science Inventory

This paper provides an overview of the sources, the estimation methodology, and the relative amounts of natural hydrocarbon and nitrogen oxide emissions. he most recent estimate of natural nonmethane hydrocarbon (NMHC) emissions for the United States is 28 teragrams per year (Tg/...

314

Darwin's Second Idea Natural Selection  

E-print Network

is a scientific theory well supported by the evidence 68%This class #12;Darwin's Ideas "a naturalists...might comeDarwin's Second Idea ­ Natural Selection · Evolution: controversial? · Natural selection ­ Darwin's postulates ­ Controversial? ­ Two examples of NS #12;Charles Darwin Darwin's Ideas 1. Species evolve over

315

Natural gas monthly, August 1990  

SciTech Connect

This report highlights activities, events, and analyses of interest to public and private sector oganizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. 33 tabs.

Not Available

1990-11-05

316

The Norwegian Nature Life Approach.  

ERIC Educational Resources Information Center

Briefly introduces the Norwegian Seminar for Nature Life with a discussion of the course methods, values, and attitudes as related to Norwegian culture. Explains the difference between this and other programs that use nature for experiential education, and addresses the need for creativity in experiential education. (SB)

Pendleton, Sarah

1983-01-01

317

Czech Children's Drawing of Nature  

ERIC Educational Resources Information Center

Do world children draw nature pictures in a certain way? Range of mountains in the background, a sun, couple clouds, a river rising from mountains. Is this type of drawing universal in the way these nature items are organized on a drawing paper? The sample size from Czech Republic included 33 participants from two kindergartens. They were 5 and 6…

Yilmaz, Zuhal; Kubiatko, Milan; Topal, Hatice

2012-01-01

318

Commentary: Biochemistry Re-Natured  

ERIC Educational Resources Information Center

In his last commentary on "Biochemistry Denatured," this author dealt with his perception that college students today have spent too little of their childhood years playing outside in nature and as a consequence have not learned basic things about the world from personal experience. This "nature-deficit disorder" removes many opportunities for…

White, Harold B.

2010-01-01

319

Nature Publishing Group Site Licenses  

E-print Network

Dental Journal) BJC (British Journal of Cancer) Bone Marrow Transplantation Cancer Gene Therapy Cell Palgrave Macmillan Journals Inspirierende Forschung in der Wirtschaft, in den Sozialwissenschaften und Inhalt www.nature.com/libraries #12;Nature Publishing Group The American Journal of Gastroenterology

Cai, Long

320

Natural Way to Stay Sweet.  

National Technical Information Service (NTIS)

A revolutionary, low-calorie sugar is now available to the food and beverage market, offering an all-natural alternative to table sugar and artificial sweeteners. Tagatose, a sugar that appears in nature in small quantities, began its unusual journey to t...

2004-01-01

321

["Non naturals" in Islamic medicine].  

PubMed

"Non naturals," which appear frequently in the history of Western medicine, means things not controlled by human nature, contrary to natural components of a body. It covers such a wide range of factors as physiological or psychological things, and the external envionment. Generally, these are classified into six categories; ambient air, food and drink, exercise and rest, sleep and wakefulness, excretion and retention, and the passions of soul. In medieval times the knowledge of these "six non naturals" constituted a kind of hygiene or regimen. People cannot avoid the effects of these elements in their lifetime, so physicians were required to learn about them not only to treat diseases but to preserve health and to prevent diseases. This became so common that it was included in the curriculum of medical schools. Although these factors were already known to have an effect on the health of humans in the early stage of Greek medicine, it took a long time to be formed into the theory of "six non naturals." Its origin can be traced back to Galen's "Ars medica," but he does not use the name "non naturals." With the later development of medicine in the Islamic world, which received Greek medicine through translation, the number and the contents of related factors differ from author to author. Moreover, they use different names; few authors use the name "non naturals." It seems that "six non naturals" had not been established as theory until the later stage of the history of medicine in Islam. PMID:20614733

Yaguchi, Naohide

2010-03-01

322

Natural Selection: How Evolution Works  

NSDL National Science Digital Library

The issue-focused interview demonstrates how natural selection is a very efficient, predictable mechanism of evolution. It illustrates how species adapt to their environment, the reproductive success of a species, design in nature and presents evidence of evolution in action, e.g., antibiotic resistance.

Douglas Futuyma (State University of New York at Stony Brook;)

2004-12-01

323

Reconceptualizing the "Nature" of Childhood  

ERIC Educational Resources Information Center

This interdisciplinary article draws upon human geography to bring fresh new perspectives to the relationship between two commonly conflated concepts: "childhood" and "nature". Childhood studies scholars have gone a long way towards retheorizing childhood beyond the "natural" and the "universal" by pointing to its historical and cultural…

Taylor, Affrica

2011-01-01

324

Teaching about Natural Background Radiation  

ERIC Educational Resources Information Center

Ambient gamma dose rates in air were measured at different locations (indoors and outdoors) to demonstrate the ubiquitous nature of natural background radiation in the environment and to show that levels vary from one location to another, depending on the underlying geology. The effect of a lead shield on a gamma radiation field was also…

Al-Azmi, Darwish; Karunakara, N.; Mustapha, Amidu O.

2013-01-01

325

Immigration, social cohesion, and naturalization  

Microsoft Academic Search

The standard appeal to social cohesion in relation to immigration concerns admittance and residence. But social cohesion is sometimes also invoked as a relevant concern in relation to the attainment of citizenship in the state through naturalization. Many western states have recently tightened conditions for naturalization and introduced tougher language requirements and knowledge of society tests. The article discusses how

Sune Lægaard

2010-01-01

326

Rational Mechanisms and Natural Mathematics  

Microsoft Academic Search

Chu spaces have found applications in computer science, mathematics, and physics. They enjoy a useful categorical duality analogous to that of lattice theory and projective geometry. As natural mathematics Chu spaces borrow ideas from the natural sciences, particularly physics, while as rational mechanics they cast Hamiltonian mechanics in terms of the interaction of body and mind. This paper addresses the

Vaughan R. Pratt

1995-01-01

327

Natural organic fibers - health effects  

Microsoft Academic Search

Objectives: Natural organic fibers are used in large quantities in the production of paper products and textiles. They are also constituents of food and added to food to promote health. The objective of this review is to evaluate the health effects of natural organic fibers. The health effects of dietary fibers are excluded from the review. Methods: This is a

B. Järvholm

2000-01-01

328

Natural Selection and Geology 230  

E-print Network

legs · e.g., human body hair, a ves;Natural Selection · The theory of natural selection was proposed by Charles Darwin in 1859, in his book the same theory as Darwin in the 1850s. #12;One of the most famous and influential books of science. #12

Kammer, Thomas

329

Natural gas monthly, December 1996  

SciTech Connect

This document highlights activities, events, and analysis of interest to the public and private sector associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also included.

NONE

1996-12-01

330

The Natural Rate of Unemployment  

Microsoft Academic Search

This paper assesses the natural rate of unemployment—the unemployment rate that arises from all sources other than fluctuations in demand associated with business cycles. The natural rate is determined by the rate at which jobs are simultaneously created and destroyed, the rate of turnover in particular jobs, and how quickly unemployed workers are matched with vacant positions. Those factors in

David Brauer

2007-01-01

331

Natural Sciences School of Biosciences  

E-print Network

Chemistry Maths Sport and Exercise Sciences Geography Earth Sciences Psychology Biochemistry #12;Structure on a combination of two `Major' subjects: biochemistry, biology, chemistry, earth sciences, mathematics, physics, psychology, sport and exercise sciences and geography. Natural Sciences degree programmes p Natural Sciences

Miall, Chris

332

Natural Gas Imports and Exports  

EIA Publications

In the face of unprecedented levels of domestic natural gas production, net imports of natural gas into the United States fell 23% in 2012. A combination of both higher exports and lower imports led to a decline in net imports. In 2012, total imports decreased by 10% to 3,135 Bcf, while total exports increased by 8% to 1,619 Bcf.

2013-01-01

333

Natural mechanisms protecting against cancer  

Microsoft Academic Search

Carcinogenesis is a multistage process. At each step of this process, there are natural mechanisms protecting against development of cancer. The majority of cancers in humans is induced by carcinogenic factors present in our environment including our food. However, some natural substances present in our diet or synthesized in our cells are able to block, trap or decompose reactive oxygen

Marek Jakóbisiak; Witold Lasek; Jakub Go?

2003-01-01

334

Perspective on completing natural inflation  

E-print Network

We present a perspective on the inflation paths in 2-, 3-,,, N-flation models. The number of non-Abelian gauge groups for a natural inflation is restricted in string compactification, and we argue that the most plausible completion of natural inflation from a theory perspective is the 2-flation.

Choi, Ki-Young; Kyae, Bumseok

2014-01-01

335

Natural gas vs. heat pumps  

Microsoft Academic Search

Spokesmen for gas and electric utilities describe the relative merits of using natural gas and electric heat pumps. Both argue that their product is more economical and operates more efficiently than its competitor. Rising natural gas prices are responsible for making costs more competitive, although rates for both gas and electricity vary by region. The utilities also describe heat pump

A. M. Verrips; W. A. Canney

2009-01-01

336

Methodological naturalism and epistemic internalism  

Microsoft Academic Search

Epistemic naturalism holds that the results or methodologies from the cognitive sciences are relevant to epistemology, and some have maintained that scien- tic methods are more compatible with externalist theories of justication than with internalist theories. But practically all discussions about naturalized epistemology are framed exclusively in terms of cognitive psychology, which is only one of the cognitive sciences. The

Gregory R. Wheeler; Luís Moniz Pereira

2008-01-01

337

34 CFR 303.18 - Natural environments.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Natural environments. 303.18 Section 303.18 Education...General Provisions § 303.18 Natural environments. As used in this part, natural environments means settings that are natural...

2010-07-01

338

34 CFR 303.18 - Natural environments.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2010-07-01 true Natural environments. 303.18 Section 303.18 Education...General Provisions § 303.18 Natural environments. As used in this part, natural environments means settings that are natural...

2011-07-01

339

Natural Products as Chemical Probes  

PubMed Central

Natural products have evolved to encompass a broad spectrum of chemical and functional diversity. It is this diversity, along with their structural complexity, that enables nature’s small molecules to target a nearly limitless number of biological macromolecules and to often do so in a highly selective fashion. Because of these characteristics, natural products have seen great success as therapeutic agents. However, this vast pool of compounds holds much promise beyond the development of future drugs. These features also make them ideal tools for the study of biological systems. Recent examples of the use of natural products and their derivatives as chemical probes to explore biological phenomena and assemble biochemical pathways are presented here. PMID:20509672

Carlson, Erin E.

2010-01-01

340

Natural gas monthly, October 1991  

SciTech Connect

The Natural Gas Monthly (NGM) is prepared in the Data Operations Branch of the Reserves and Natural Gas Division, Office of Oil and Gas, Energy Information Administration (EIA), US Department of Energy (DOE). The NGM highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. The data in this publication are collected on surveys conducted by the EIA to fulfill its responsibilities for gathering and reporting energy data. Some of the data are collected under the authority of the Federal Energy Regulatory Commission (FERC), an independent commission within the DOE, which has jurisdiction primarily in the regulation of electric utilities and the interstate natural gas industry. Geographic coverage is the 50 States and the District of Columbia. 16 figs., 33 tabs.

Not Available

1991-11-05

341

Comparative study of microtubule inhibitors--estramustine and natural podophyllotoxin conjugated PAMAM dendrimer on glioma cell proliferation.  

PubMed

The synthetic estramustine (EM) and natural podophyllotoxin (PODO) anti-mitotic agents that inhibit tubulin polymerization are known anticancer agents. As low bioavailability limits their anticancer properties, we investigated whether conjugation with PAMAM dendrimer (D) could enhance the activity of D-EM and D-PODO by altering their release pattern. Release kinetics indicated synthesized conjugates to be stable against hydrolytic cleavage and showed sustained release characteristics. However, release of D-EM was slow compared to D-PODO conjugate. Antitumor effect of these conjugates on glioma cells revealed (i) increased cell death and cell cycle arrest (ii) decreased migration and (iii) increased tubulin depolymerization as compared to free drug. Importantly, the effects of natural PODO conjugate on glioma cell survival and migration is more pronounced than D-EM. PMID:23954240

Sk, Ugir Hossain; Dixit, Deobrat; Sen, Ellora

2013-10-01

342

International Year of Natural Fibres  

NSDL National Science Digital Library

The United Nations Food and Agriculture Organization has designated 2009 as the International Year of Natural Fibres. The goals of this year are three-fold: to raise the profile of natural fibers in a market increasingly dominated by synthetic fibers; convey the value of using natural fibers to consumers; and help sustain the income of the often poor farmers of natural fibers. This very interesting website for the "Year" is available in English, French, Chinese and Spanish. Visitors interested in learning about the history of natural fibers, as well as what different types of natural fibers there are, what they look like, and what they are used for, will find this website fits the bill. On the menu on the far right side of the page, visitors can click on the link "15 Natural Fibres" to peruse a brief history and learn about the different natural fibers that come from plants and animals. Most of the fibers featured include information on what the fiber is, who produces it, how it's produced, and how much is produced, which can be accessed by rolling the mouse over the name or picture of the fiber, and clicking. The link on the menu on the far right side of the page entitled "Fibre Stories" has four stories about new innovations for several different natural fibers. There is a story about cotton in Asia, hemp in China, alpaca in Peru, and sisal in Tanzania. Events around the world celebrating the International Year of Natural Fibres can be found on the far right menu, at the "Events" link.

343

The Science of Middle Nature  

NASA Astrophysics Data System (ADS)

In the field of biogeochemistry, urbanization is often considered as an "alteration" or "disturbance" to the earth's surface and its natural processes. This view is an outcome of the view of nature inherent in earth system science and ecology, in which nature is defined as separate from humans and society. However, other disciplines are based in alternative views of nature in which humans are more integral components of the landscape. Urban planning, landscape architecture, agriculture, and horticulture, for example, more fully integrate the role of landscape design and management in the functioning of human-dominated ecosystems. We suggest that the field of urban biogeochemistry has been somewhat limited by the predominant, disturbance-based view of the role of nature in cities, and that more deeply evaluating and broadening the concept of nature inherent in studies of urban processes can enhance our understanding of the role of urbanization in the earth system. A particularly useful concept is the "middle nature" proposed by Cosgrove (1993), which serves a purpose of "actively transforming nature into culture." It is this view of urban landscapes as middle nature, or transformation of urban space into human-dominated nature with a purpose, that is lacking from the current scientific discourse about the role of biogeochemistry in urban ecosystem services. A scientific evaluation of middle nature implies studying the performance of urban designs to meet intended cultural and environmental goals, including beauty, social equity, governance, and social capital as well as environmental quality. We describe our work in evaluating the transformed urban landscapes of Los Angeles from multiple perspectives that focus on urban livability, equity, and beauty as well as the physical impacts of plants and soils on the environment. The outcomes of this process do not necessary meet the traditional demands of biophysical ecology such as utilizing native species, maximizing carbon sequestration, or minimizing human disturbance. Rather, in our project the discourse is shifting away from the ecosystem services framework, and towards a shared vision for middle nature as the intersection between nature as we have traditionally valued it outside of the city, and its integral role in urban culture, design, function, and quality of life.

Pataki, D. E.; Pincetl, S.

2012-12-01

344

M. Bahrami ENSC 388 (F09) Natural Convection 1 Natural Convection  

E-print Network

Convection 1 Natural Convection In natural convection, the fluid motion occurs by natural means such as buoyancy. Since the fluid velocity associated with natural convection is relatively low, the heat transfer coefficient encountered in natural convection is also low. Mechanisms

Bahrami, Majid

345

Nature's Trust: A Paradigm for Natural Resources Stewardship  

NASA Astrophysics Data System (ADS)

Climate change uncertainty puts a premium on all remaining natural resources. Farmland, air, water, wetlands, wildlife, soils, mineral resources and forests must be protected to ensure that Americans - present citizens and future generations - have the fundamental survival resources they need in a future that holds many unknowns. Moreover, in light of the need to manage resources given climate and particle forcing, government must mitigate dangerous carbon loading of the atmosphere. Confronting climate change and protecting natural resources requires a clear sense of government obligation that is inherent to sovereignty, not a matter of political choice. Our government representatives can and must reframe government's discretion into a trustee obligation to protect Nature and ensure natural resource stewardship. Drawing upon enduring legal principles and court decisions, government can be characterized as a trustee of the natural resources essential to human survival. A trust is a fundamental type of ownership whereby one manages property for the benefit of another. Viewed as a trust, the environment consists of a portfolio of quantified natural assets that government manages. As beneficiaries, citizens hold a common property interest in defined, bounded assets that make up Nature's Trust. Such trust principles form the bedrock of statutory law. Trustees have a fiduciary obligation to protect trust assets and may not allow destruction of property they manage. This session will provide a policy frame for current scientific efforts to address climate change and natural resources loss. Under the Nature's Trust frame, U.S. government leaders and agencies at every level inherit a strict fiduciary obligation to protect our collective natural resources, including our water and the atmosphere, as assets in the trust. Their fiduciary standard of care consists of a proportionate responsibility, which ties directly to "Nature's Mandate" as defined by current climate scientists: each jurisdiction must cap and begin reducing total GHG emissions within the decade and continue reduction until they reach 80% below 1990 levels by 2050. The trust framework positions all nations of the world in a logical relationship that can guide international diplomacy. The atmosphere, oceans and the global hydrologic cycle are commonly held assets shared as property among all nations on Earth. Thus, all Nations are sovereign co-tenant trustees, each holding the fiduciary responsibility to not degrade the common asset and to accomplish proportionate carbon reduction.

Wood, M. C.; Whitelaw, E.; Doppelt, B.; Burchell, A.

2007-12-01

346

Identified EM Earthquake Precursors  

NASA Astrophysics Data System (ADS)

Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After a number of custom rock experiments, two hypotheses were formed which could answer the EM wave model. The first hypothesis concerned a sufficient and continuous electron movement either by surface or penetrative flow, and the second regarded a novel approach to radio transmission. Electron flow along fracture surfaces was determined to be inadequate in creating strong EM fields, because rock has a very high electrical resistance making it a high quality insulator. Penetrative flow could not be corroborated as well, because it was discovered that rock was absorbing and confining electrons to a very thin skin depth. Radio wave transmission and detection worked with every single test administered. This hypothesis was reviewed for propagating, long-wave generation with sufficient amplitude, and the capability of penetrating solid rock. Additionally, fracture spaces, either air or ion-filled, can facilitate this concept from great depths and allow for surficial detection. A few propagating precursor signals have been detected in the field occurring with associated phases using custom-built loop antennae. Field testing was conducted in Southern California from 2006-2011, and outside the NE Texas town of Timpson in February, 2013. The antennae have mobility and observations were noted for recurrence, duration, and frequency response. At the Southern California field sites, one loop antenna was positioned for omni-directional reception and also detected a strong First Schumann Resonance; however, additional Schumann Resonances were absent. At the Timpson, TX field sites, loop antennae were positioned for directional reception, due to earthquake-induced, hydraulic fracturing activity currently conducted by the oil and gas industry. Two strong signals, one moderately strong signal, and approximately 6-8 weaker signals were detected in the immediate vicinity. The three stronger signals were mapped by a biangulation technique, followed by a triangulation technique for confirmation. This was the first antenna mapping technique ever performed for determining possible earthquake epicenters. Six and a half months later, Timpson experienced two M4 (M4.1 and M4.3) earthquakes on September 2, 2013 followed by a M2.4 earthquake three days later, all occurring at a depth of five kilometers. The Timpson earthquake activity now has a cyclical rate and a forecast was given to the proper authorities. As a result, the Southern California and Timpson, TX field results led to an improved design and construction of a third prototype antenna. With a loop antenna array, a viable communication system, and continuous monitoring, a full fracture cycle can be established and observed in real-time. In addition, field data could be reviewed quickly for assessment and lead to a much more improved earthquake forecasting capability. The EM precursors determined by this method appear to surpass all prior precursor claims, and the general public will finally receive long overdue forecasting.

Jones, Kenneth, II; Saxton, Patrick

2014-05-01

347

New methods for assessing the fascinating nature of nature experiences.  

PubMed

In recent years, numerous environmental psychology studies have demonstrated that contact with nature as opposed to urban settings can improve an individual's mood, can lead to increased levels of vitality, and can offer an opportunity to recover from stress. According to Attention Restoration Theory (ART) the restorative potential of natural environments is situated in the fact that nature can replenish depleted attentional resources. This replenishment takes place, in part, because nature is deemed to be a source of fascination, with fascination being described as having an "attentional", an "affective" and an "effort" dimension. However, the claim that fascination with nature involves these three dimensions is to a large extent based on intuition or derived from introspection-based measurement methods, such as self-reports. In three studies, we aimed to more objectively assess whether these three dimensions indeed applied to experiences related to natural environments, before any (attentional) depletion has taken place. The instruments that were used were: (a) the affect misattribution procedure (Study 1), (b) the dot probe paradigm (Study 2) and (c) a cognitively effortful task (Study 3). These instrument were respectively aimed at verifying the affective, attentional and effort dimension of fascination. Overall, the results provide objective evidence for the claims made within the ART framework, that natural as opposed to urban settings are affectively positive (cfr., affective dimension) and that people have an attentional bias to natural (rather than urban) environments (cfr., attentional dimension). The results regarding the effort dimension are less straightforward, and suggest that this dimension only becomes important in sufficiently difficult cognitive tasks. PMID:23922645

Joye, Yannick; Pals, Roos; Steg, Linda; Evans, Ben Lewis

2013-01-01

348

DESENVOLVIMENTO DE AMBIENTE COMPUTACIONAL PARA A DETERMINAÇÃO DO COEFICIENTE DE ATIVIDADE A PARTIR DE DADOS EXPERIMENTAIS DE EQUILÍBRIO DE FASES  

Microsoft Academic Search

The researches in thermodynamics applied to separation processes of LAOS - Laboratório de Operações de Separação - have as objectives to determine the thermodynamic properties of the balance of phases through the appliance of models to describe multicomponent systems of natural product in low and high pressures, searching for orientation and minimization of the experimental measures as well as accomplishing

Marcelo Melo da Costa; Marilena Emmi Araújo

349

The Nature of US Natural Hazards Research, 1988-2008  

NASA Astrophysics Data System (ADS)

Numerous academic disciplines have contributed to the body of published research on natural hazards and disasters. Geologists, engineers, geographers, and sociologists have participated since the topic first emerged as a formal research agenda in the early 1950s. In more recent decades, psychologists, political scientists, economists, historians, archeologists, anthropologists, architects, computer scientists, and artists have added to our understanding of environmental risk, hazard, and disaster. When examined in-print, what are the discipline-demographics of natural hazards? Who contributes and who tends to have the greater influence on scholarly discourse related to the topic? Are there clear trends in methods, techniques, or paradigmatic approaches? To what degree does this inherently interdisciplinary topic render interdisciplinary research? This paper will present initial findings from a larger data set on natural hazards and social science research. We will describe the discipline-demographics of natural hazards scholarship by examining college-level texts, peer-reviewed journal publications, federally-funded reports, and federally-funded research grants relating to natural hazards or disasters from 1988 to 2008. The citation frequency of sampled references will also be examined as a surrogate for influence on the scholarly discourse of natural hazards. In this paper, we will focus attention on the contributions of social scientists during this period, including an assessment of temporal trends relative to specific disaster events.

Hagelman, R., III

2009-04-01

350

Darwin's explanation of design: from natural theology to natural selection.  

PubMed

Copernicus, Galileo, Newton and other physical scientists ushered in a conception of the universe as matter in motion governed by natural laws. Their discoveries brought about a fundamental revolution, namely a commitment to the postulate that the universe obeys immanent laws that can account for natural phenomena. The workings of the universe were brought into the realm of science: explanation through natural laws. Darwin completed the Copernican revolution by extending it to the living world. Darwin demonstrated the evolution of organisms. More important yet is that he discovered natural selection, the process that explains the "design" of organisms. The adaptations and diversity of organisms, the origin of novel and complex species, even the origin of mankind, could now be explained by an orderly process of change governed by natural laws. The origin of species and the exquisite features of organisms had previously been explained as special creations of an Omniscient God. Darwin brought them into the domain of science. Evolution is a creative process that produces genuine novelty. The creative power of evolution arises from a distinctive interaction between chance and necessity, between random mutation and natural selection. PMID:19800418

Ayala, Francisco J

2010-08-01

351

Natural Fiber Composites: A Review  

SciTech Connect

The need for renewable fiber reinforced composites has never been as prevalent as it currently is. Natural fibers offer both cost savings and a reduction in density when compared to glass fibers. Though the strength of natural fibers is not as great as glass, the specific properties are comparable. Currently natural fiber composites have two issues that need to be addressed: resin compatibility and water absorption. The following preliminary research has investigated the use of Kenaf, Hibiscus cannabinus, as a possible glass replacement in fiber reinforced composites.

Westman, Matthew P.; Fifield, Leonard S.; Simmons, Kevin L.; Laddha, Sachin; Kafentzis, Tyler A.

2010-03-07

352

Neural processing of natural sounds.  

PubMed

We might be forced to listen to a high-frequency tone at our audiologist's office or we might enjoy falling asleep with a white-noise machine, but the sounds that really matter to us are the voices of our companions or music from our favourite radio station. The auditory system has evolved to process behaviourally relevant natural sounds. Research has shown not only that our brain is optimized for natural hearing tasks but also that using natural sounds to probe the auditory system is the best way to understand the neural computations that enable us to comprehend speech or appreciate music. PMID:24840800

Theunissen, Frédéric E; Elie, Julie E

2014-06-01

353

Is Science Biased Toward Natural?  

EPA Science Inventory

Having widely available, accurate, understandable, and unbiased scientific information is central to the successful resolution of the typically contentious, divisive, and litigious natural resource policy issue. Three examples are offered to illustrate how science is often misus...

354

Building representations from natural language  

E-print Network

In this thesis, I describe a system I built that produces instantiated representations from descriptions embedded in natural language. For example, in the sentence 'The girl walked to the table', my system produces a ...

Seifter, Mark J

2007-01-01

355

SUSTAINABILITY REPORTING NATURAL RESOURCES DEFENSE  

E-print Network

SUSTAINABILITY REPORTING AND THE NATURAL RESOURCES DEFENSE COUNCIL AUGUST 2012 Capstone Team RELEVANCE/CONTEXT 4 HISTORY OF SUSTAINABILITY REPORTING 4 ORGANIZATIONAL PROFILE 7 METHODOLOGY 8 FINDINGS AND DISCUSSION 11 FINDINGS FROM INTERVIEWS 11 SUSTAINABILITY FRAMEWORK ASSESSMENT 12

Qian, Ning

356

Nature Publishing Group Site Licenses  

E-print Network

Pharmacologica Sinica) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer SITE LICENSES Nature Publishing Group Palgrave Macmillan Journals , . SciBX: Science Publishing Group The American Journal of Gastroenterology American Journal of Hypertension APS (Acta

Cai, Long

357

Nature Publishing Group Site Licenses  

E-print Network

) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer) Bone Marrow SITE LICENSES Nature Publishing Group Znanstvena in zdravstvena izvrstnost Palgrave Macmillan Journals The American Journal of Gastroenterology American Journal of Hypertension APS (Acta Pharmacologica Sinica

Cai, Long

358

Nature Publishing Group Site Licenses  

E-print Network

) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer) Bone Marrow SITE LICENSES Nature Publishing Group Znanstvena i medicinska izvanrednost Palgrave Macmillan Journals The American Journal of Gastroenterology American Journal of Hypertension APS (Acta Pharmacologica Sinica

Cai, Long

359

Nature Publishing Group Site Licenses  

E-print Network

Sinica) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer) Bone SITE LICENSES Nature Publishing Group Eccellenza scientifica e medica Palgrave Macmillan Journals Group The American Journal of Gastroenterology American Journal of Hypertension APS (Acta Pharmacologica

Cai, Long

360

Statistical models for natural sounds  

E-print Network

is optimised for the statistics of natural sounds. #12;4 Acknowledgments A simple recipe for doing research, Peter Dayan, who is a consummate researcher and deft politician. May the numerous seminars and daily tea

Ghahramani, Zoubin

361

Burroughs As a Nature Essayist  

E-print Network

KU ScholarWorks | The University of Kansas Pre-1923 Dissertations and Theses Collection Burroughs As a Nature Essayist 1908 by Bernice Elizabeth Jones This work was digitized by the Scholarly Communications program staff in the KU Libraries’ Center...

Jones, Bernice

1908-01-01

362

Natural antibody - Biochemistry and functions  

PubMed Central

Natural antibodies have been common knowledge in the scientific community for more than half a century. Initially disregarded, their functions have garnered a newfound interest recently. Natural antibodies are usually polyreactive IgM antibodies and are implicated in numerous physiologic and pathologic processes. Current research demonstrates they play a role in adaptive and innate immune responses, autoimmunity, and apoptosis. Evidence exists that they are involved in the modulation of neurodegenerative disorders and malignancy. Furthermore, natural antibodies have been implicated in ischemia reperfusion injury and atherosclerosis. As such the study of natural antibodies may provide new insight into normal physiologic processes whilst concurrently paving the road for a wide-range of possible therapeutic options.

Rahyab, Ali Seyar; Alam, Amit; Kapoor, Aricka; Zhang, Ming

2012-01-01

363

Research in Natural Language Processing.  

National Technical Information Service (NTIS)

Primary interest is in the development of systems which can automatically process natural language text concerning limited domains. At the outset of our research, a number of research groups had created systems which could analyze some moderately complex ...

R. Grishman

1990-01-01

364

Natural Gas Monthly August 1998  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. Explanatory notes supplement the information found in tables of the report. A description of the data collection surveys that support the NGM is provided. A glossary of the terms used in this report is also provided to assist readers in understanding the data presented in this publication.

NONE

1998-08-01

365

A quantum of natural selection  

NASA Astrophysics Data System (ADS)

The modern evolutionary synthesis, which marries Darwin's theory of natural selection with Mendel's genetics, was developed around the same time as quantum mechanics. Is there any connection between the two?

Lloyd, Seth

2009-03-01

366

Sepbox Technique in Natural Products  

PubMed Central

Natural compounds still play an increasingly important role in many areas of research and development. Their structural diversity is enhanced by the synthetic potential of combinatorial chemistry. Fractionation and separation of samples obtained from nature remain time-consuming, tedious and extremely expensive even though the assays for testing these samples have become faster and more cost-effective thanks to advanced high-throughput screening (HTS) processes. Today, sepbox is the standard technology used for separating compounds from natural resources. Fractionations and separation of samples obtained from nature remain very difficult. Automation of sample preparation therefore has great economic potential. The unique sepbox concept allows processing sample automatically and will make up to 30 times faster than by using a conventional process. PMID:21897663

Bhandari, M; Bhandari, Anil; Bhandari, A

2011-01-01

367

Growing a natural gas major  

SciTech Connect

This paper discusses attributes needed to succeed in the natural gas industry. Attributes identified include the ability to market multiple commodities; full integration in the midstream; an opportunistic marketing culture; and a global perspective.

Galvin, R.E.

1996-12-31

368

Information Resources CHILDREN AND NATURE  

E-print Network

1 Information Resources CHILDREN AND NATURE Special thanks to the individuals and organizations who have contributed these materials to the library. TABLE OF CONTENTS: BOOKS FOR CHILDREN Nonfiction _____________________________________________ 2 BOOKS FOR CHILDREN Fiction _______________________________________________ 41 PARENT

Yetisgen-Yildiz, Meliha

369

Natural Light and Your Health  

MedlinePLUS

... lower right-hand corner of the player. Natural Light and Your Health HealthDay August 22, 2014 Related ... windowless on the job. The researchers measured office light exposure and collected data on participants sleep length ...

370

Basic taxation of natural resources  

SciTech Connect

This book contains 19 selections. Some of the titles are: Introduction to taxation and natural resources; The economic interest concept; Oil and gas exploration and development expenditures; Percentage depletion for oil and gas; and Mine reclamation and closing expenses.

Not Available

1986-01-01

371

Nature Web Focus: Ocean Genomics  

NSDL National Science Digital Library

The August 28, 2003 issue of the journal Nature presented a collection of reports that, "along with other analysis of key components of the ocean's food web, highlights the significance of genome sequences from the sea." This Web Focus provides access to these reports free of charge to any reader. The reports focus particularly on marine phytoplankton. The site also includes links to related articles from the Nature archives, but viewing these reports requires a paid subscription.

2003-01-01

372

Natural Language Processing for Biosurveillance  

Microsoft Academic Search

\\u000a Information described in electronic clinical reports can be useful for both detection and characterization of outbreaks. However,\\u000a the information is in unstructured, free-text format and is not available to computerized applications. Natural Language processing\\u000a methods structure free-text information by classifying, extracting, and encoding details from the text. We provide a brief\\u000a description of the types of natural Language processing techniques

Wendy W. Chapman; Adi V. Gundlapalli; Brett R. South; John N. Dowling

373

Alternative sources of natural rubber  

Microsoft Academic Search

Rubber (cis-1,4-polyisoprene) is one of the most important polymers naturally produced by plants because it is a strategic raw material\\u000a used in more than 40,000 products, including more than 400 medical devices. The sole commercial source, at present, is natural\\u000a rubber harvested from the Brazilian rubber tree, Hevea brasiliensis. Primarily due to its molecular structure and high molecular weight (>1

H. Mooibroek; K. Cornish

2000-01-01

374

Nature-Based Therapeutic Interventions  

Microsoft Academic Search

\\u000a The point of departure of this chapter is to view nature-based settings as an important asset for improvement and promotion\\u000a of health. During the last decades the concepts of healthy nature-based settings and accompanying treatment programs have\\u000a been referred to by many names, making the subject difficult to interpret. Here the development of the theoretical framework\\u000a and the research area

Ulrika K. Stigsdotter; Anna Maria Palsdottir; Ambra Burls; Alessandra Chermaz; Francesco Ferrini; Patrik Grahn

375

Natural cement and monumental restoration  

Microsoft Academic Search

Natural cement, called “Roman” cement, was invented at the end of the 19th century and played an important role in the development\\u000a of civil engineering works until the 1860s. More surprisingly, it was also used to restore historic buildings, such as gothic\\u000a cathedrals. This paper deals with the mineralogy and the durability of natural cement in the particular case of

C. Gosselin; V. Verges-Belmin; A. Royer; G. Martinet

2009-01-01

376

Natural gas monthly, November 1997  

SciTech Connect

This issue of the Natural Gas Monthly presents the most recent estimates of natural gas data from the Energy Information Administration. Estimates extend through November for many data series, and through August for most natural gas prices. Highlights of the most recent data estimates are: (1) Preliminary estimates of dry natural gas production and total consumption available through November 1997 indicate that both series are on track to end the year at levels close to those of 1996. Cumulative dry production is one-half percent higher than in 1996 and consumption is one-half percent lower. (2) Natural gas production is estimated to be 52.6 billion cubic feet per day in November 1997, the highest rate since March 1997. (3) After falling 8 percent in July 1997, the national average wellhead price rose 10 percent in August 1997, reaching an estimated $2.21 per thousand cubic feet. (4) Milder weather in November 1997 compared to November 1996 has resulted in significantly lower levels of residential consumption of natural gas and net storage withdrawls than a year ago. The November 1997 estimates of residential consumption and net withdrawls are 9 and 20 percent lower, respectively, than in November 1996.

NONE

1997-11-01

377

Natural gas monthly, July 1995  

SciTech Connect

The Natural Gas Monthly (NGM) highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Producer-related activities and underground storage data are also reported. From time to time, the NGM features articles designed to assist readers in using and interpreting natural gas information. The data in this publication are collected on surveys conducted by the EIA to fulfill its responsibilities for gathering and reporting energy data. Some of the data are collected under the authority of the Federal Energy Regulatory Commission (FERC), an independent commission within the DOE, which has jurisdiction primarily in the regulation of electric utilities and the interstate natural gas industry. Geographic coverage is the 50 States and the District of Columbia. Explanatory Notes supplement the information found in tables of the report. A description of the data collection surveys that support the NGM is provided in the Data Sources section. A glossary of the terms used in this report is also provided to assist readers in understanding the data presented in this publication. All natural gas volumes are reported at a pressure base of 14.73 pounds per square inch absolute (psia) and at 60 degrees Fahrenheit. Cubic feet are converted to cubic meters by applying a factor of 0.02831685.

NONE

1995-07-21

378

Method of dehydrating natural gas  

SciTech Connect

A method for dehydration of natural gas is provided wherein well head gas is supplied to a three-phase inlet separator, the vapor mixture of natural gas and water removed from that inlet separator means is supplied to a turboexpander, and the resulting refrigerated mixture of natural gas and condensed water vapor is supplied to a multi-phase outlet separator. The turboexpander may have integral means for subsequent compression of the refrigerated mixture and may be coupled through reduction gears to a means for generating electricity. A portion of the refrigerated mixture may be connected to a heat exchanger for cooling the well head natural gas prior to entry into the inlet separator. The flow of refrigerated mixture to this heat exchanger may be controlled by a temperature sensitive valve downstream of the heat exchanger. Methanol may be injected into the vapor mixture prior to entry into the turboexpander. The flow of methanol into the vapor mixture may be controlled by a valve sensitive to the flow rate of the vapor mixture and the water vapor content of the refrigerated mixture. Natural gas vapor from the outlet separator may be recirculated through the turboexpander if the output water vapor content of the natural gas vapor stream is too high.

Wells, R. E.

1985-01-01

379

Natural Selection Promotes Antigenic Evolvability  

PubMed Central

The hypothesis that evolvability - the capacity to evolve by natural selection - is itself the object of natural selection is highly intriguing but remains controversial due in large part to a paucity of direct experimental evidence. The antigenic variation mechanisms of microbial pathogens provide an experimentally tractable system to test whether natural selection has favored mechanisms that increase evolvability. Many antigenic variation systems consist of paralogous unexpressed ‘cassettes’ that recombine into an expression site to rapidly alter the expressed protein. Importantly, the magnitude of antigenic change is a function of the genetic diversity among the unexpressed cassettes. Thus, evidence that selection favors among-cassette diversity is direct evidence that natural selection promotes antigenic evolvability. We used the Lyme disease bacterium, Borrelia burgdorferi, as a model to test the prediction that natural selection favors amino acid diversity among unexpressed vls cassettes and thereby promotes evolvability in a primary surface antigen, VlsE. The hypothesis that diversity among vls cassettes is favored by natural selection was supported in each B. burgdorferi strain analyzed using both classical (dN/dS ratios) and Bayesian population genetic analyses of genetic sequence data. This hypothesis was also supported by the conservation of highly mutable tandem-repeat structures across B. burgdorferi strains despite a near complete absence of sequence conservation. Diversification among vls cassettes due to natural selection and mutable repeat structures promotes long-term antigenic evolvability of VlsE. These findings provide a direct demonstration that molecular mechanisms that enhance evolvability of surface antigens are an evolutionary adaptation. The molecular evolutionary processes identified here can serve as a model for the evolution of antigenic evolvability in many pathogens which utilize similar strategies to establish chronic infections. PMID:24244173

Graves, Christopher J.; Ros, Vera I. D.; Stevenson, Brian; Sniegowski, Paul D.; Brisson, Dustin

2013-01-01

380

Imaging natural cognition in action.  

PubMed

The primary function of the human brain is arguably to optimize the results of our motor actions in an ever-changing environment. Our cognitive processes and supporting brain dynamics are inherently coupled both to our environment and to our physical structure and actions. To investigate human cognition in its most natural forms demands imaging of brain activity while participants perform naturally motivated actions and interactions within a full three-dimensional environment. Transient, distributed brain activity patterns supporting spontaneous motor actions, performed in pursuit of naturally motivated goals, may involve any or all parts of cortex and must be precisely timed at a speed faster than the speed of thought and action. Hemodynamic imaging methods give information about brain dynamics on a much slower scale, and established techniques for imaging brain dynamics in all modalities forbid participants from making natural extensive movements so as to avoid intractable movement-related artifacts. To overcome these limitations, we are developing mobile brain/body imaging (MoBI) approaches to study natural human cognition. By synchronizing lightweight, high-density electroencephalographic (EEG) recording with recordings of participant sensory experience, body and eye movements, and other physiological measures, we can apply advanced data analysis techniques to the recorded signal ensemble. This MoBI approach enables the study of human brain dynamics accompanying active human cognition in its most natural forms. Results from our studies have provided new insights into the brain dynamics supporting natural cognition and can extend theories of human cognition and its evolutionary function - to optimize the results of our behavior to meet ever-changing goals, challenges, and opportunities. PMID:24076470

Gramann, Klaus; Ferris, Daniel P; Gwin, Joseph; Makeig, Scott

2014-01-01

381

Fractal Nature of Solar Interior  

E-print Network

Fractal method has been studied to understand the irregular and chaotic nature of any physical structure. Conventionally it is suggested that the solar interior is rigid in nature. Since solar neutrino flux is the indicator of the interior solar structure it is natural to study the solar neutrino flux source to find if the nuclear energy generation inside the sun is fractal in nature or not. At present there exist five solar neutrino experiments to detect neutrinos from the sun which can suggest which type of nuclear energy generation occurs inside the sun. Since we know that the solar atmosphere is irregular in nature many authors have studied this irregular nature by fractal analysis. In this regard we have studied solar neutrino flux data from 1) Homestake detector during the period from March, 1970 to April, 1994; 2) SAGE detector during the period from 1st January, 1990 to 31st December, 2000; 3) SAGE detector during the period from April, 1998 to December, 2001; 4) GALLEX detector during the period from May, 1991 to January, 1997; 5) GNO detector during the period from May, 1998 to December, 2001; 6) GALLEX-GNO detector (combined data) from May, 1991 to December, 2001; 7) average of the data from GNO and SAGE detectors during the period from May, 1998 to December, 2001; 8) 5-day-long samples from Super-Kamiokande-I detector during the period from June, 1996 to July,2001; 9) 10-day-long samples from Super-Kamiokande-I detector during the period from June,1996 to July,2001 and 10) 45-day-long samples from Super-Kamiokande-I detector during the period from June,1996 to July,2001 by fractal analysis and we have arrived at the conclusion that the solar neutrino flux data are fractal in nature.

Koushik Ghosh; Probhas Raychaudhuri

2006-05-04

382

www.nature.com/reviews Leadingthe field  

E-print Network

* Nature Reviews Nephrology* Nature Reviews Neurology* Nature Reviews Rheumatology* Nature Reviews Urology A personalized approach UROLOGY nrurol_OFC_JUL13.indd 1 21/06/2013 16:56 July 2013 volume 9 no. 7 www:56 Nature Reviews Nephrology Chief Editor: Susan Allison, PhD Impact Factor: 7.943* Ranking: 3/73 in Urology

Cai, Long

383

Delivery of Hydrogen Produced from Natural Gas  

E-print Network

Delivery of Hydrogen Produced from Natural Gas Christopher Freitas Office of Natural Gas-derived gaseous hydrogen delivery. The focus of this presentation will be on natural gas-derived gaseous hydrogen is needed on the effects of adding hydrogen to natural gas - Feasibility of injecting hydrogen into natural

384

Natural gas pretreatment prior to liquefaction  

Microsoft Academic Search

This patent describes a method for pretreatment of natural gas having an elevated pressure and containing moisture and about 1.5% to 3.5% by volume of COâ prior to liquefaction of the natural gas which comprises the steps of: a. dehydrating the natural gas; b. partially cooling the natural gas by heat exchange with countercurrent streams of pretreated natural gas and

S. J. Markbreiter; I. Weiss

1989-01-01

385

Natural theology and natural philosophy in the late Renaissance  

E-print Network

. Day unto day uttereth speech, and night unto night sheweth knowledge. There is no speech nor language, where their voice is not heard.13 It is not necessary here to list the other frequently-cited sources that informed the doctrine of natural... , and sensibilities (New York: W.W. Norton, 1999), 396ff. 9 theology…spared men the terror of living in a godless universe created by chance.’24 But that was a terror not yet felt and that godless universe was not yet imagined. The point of natural theology...

Woolford, Thomas

2012-04-10

386

Natural pigments and sacred art  

NASA Astrophysics Data System (ADS)

Since the dawn of mankind, cavemen has expressed himself through art. The earliest known cave paintings date to some 32,000 years ago and used 4 colours derived from the earth. These pigments were iron oxides and known as ochres, blacks and whites. All pigments known by the Egyptians, the Greeks, the Romans and Renaissance man were natural and it was not until the 18th century that synthetic pigments were made and widely used. Until that time all art, be it sacred or secular used only natural pigments, of which the preparation of many have been lost or rarely used because of their tedious preparation. As a geologist, a mineralogist and an artist specializing in iconography, I have been able to rediscover 89 natural pigments extracted from minerals. I use these pigments to paint my icons in the traditional Byzantine manner and also to restore old icons, bringing back their glamour and conserving them for years to come. The use of the natural pigments in its proper way also helps to preserve the traditional skills of the iconographer. In the ancient past, pigments were extremely precious. Many took an exceedingly long journey to reach the artists, and came from remote countries. Research into these pigments is the work of history, geography and anthropology. It is an interesting journey in itself to discover that the blue aquamarines came from Afghanistan, the reds from Spain, the greens Africa, and so on. In this contribution I will be describing the origins, preparation and use of some natural pigments, together with their history and provenance. Additionally, I will show how the natural pigments are used in the creation of an icon. Being a geologist iconographer, for me, is a sacrement that transforms that which is earthly, material and natural into a thing of beauty that is sacred. As bread and wine in the Eucharist, water during baptism and oil in Holy Union transmit sanctification to the beholder, natural pigments do the same when one considers an icon. The iconographer uses earthly creations to create divine images: "Thine own of Thine own we offer unto Thee." (Byzantine Liturgy). Thus, by combining geology with art and religion, I can render homage to God through His creation by using minerals of the Planet Earth, as natural pigments in painting His image.

Kelekian, Lena, ,, Lady

2010-05-01

387

Environmentalism and natural aggregate mining  

USGS Publications Warehouse

Sustaining a developed economy and expanding a developing one require the use of large volumes of natural aggregate. Almost all human activity (commercial, recreational, or leisure) is transacted in or on facilities constructed from natural aggregate. In our urban and suburban worlds, we are almost totally dependent on supplies of water collected behind dams and transported through aqueducts made from concrete. Natural aggregate is essential to the facilities that produce energy-hydroelectric dams and coal-fired powerplants. Ironically, the utility created for mankind by the use of natural aggregate is rarely compared favorably with the environmental impacts of mining it. Instead, the empty quarries and pits are seen as large negative environmental consequences. At the root of this disassociation is the philosophy of environmentalism, which flavors our perceptions of the excavation, processing, and distribution of natural aggregate. The two end-member ideas in this philosophy are ecocentrism and anthropocentrism. Ecocentrism takes the position that the natural world is a organism whose arteries are the rivers-their flow must not be altered. The soil is another vital organ and must not be covered with concrete and asphalt. The motto of the ecocentrist is "man must live more lightly on the land." The anthropocentrist wants clean water and air and an uncluttered landscape for human use. Mining is allowed and even encouraged, but dust and noise from quarry and pit operations must be minimized. The large volume of truck traffic is viewed as a real menace to human life and should be regulated and isolated. The environmental problems that the producers of natural aggregate (crushed stone and sand and gravel) face today are mostly difficult social and political concerns associated with the large holes dug in the ground and the large volume of heavy truck traffic associated with quarry and pit operations. These concerns have increased in recent years as society's demand for living space has encroached on the sites of production; in other words, the act of production has engendered condemnation. Many other environmental problems that are associated with dust and noise and blasting from quarry and pit operations have been reduced through the efficient use of technology. Recycling concrete in buildings, bridges, and roads and asphaltic pavements will ultimately reduce the demand for virgin natural aggregate. The impact created by the large holes in the ground required for the mining of natural aggregate can be greatly reduced by planning their reclamation before mining begins. ?? 2002 International Association for Mathematical Geology.

Drew, L.J.; Langer, W.H.; Sachs, J.S.

2002-01-01

388

Economics of natural gas upgrading  

SciTech Connect

Natural gas could be an important alternative energy source in meeting some of the market demand presently met by liquid products from crude oil. This study was initiated to analyze three energy markets to determine if greater use could be made of natural gas or natural gas derived products and if those products could be provided on an economically competitive basis. The three markets targeted for possible increases in gas use were motor fuels, power generation, and the chemical feedstocks market. The economics of processes to convert natural gas to transportation fuels, chemical products, and power were analyzed. The economic analysis was accomplished by drawing on a variety of detailed economic studies, updating them and bringing the results to a common basis. The processes analyzed included production of methanol, MTBE, higher alcohols, gasoline, CNG, and LNG for the transportation market. Production and use of methanol and ammonia in the chemical feedstock market and use of natural gas for power generation were also assessed. Use of both high and low quality gas as a process feed stream was evaluated. The analysis also explored the impact of various gas price growth rates and process facility locations, including remote gas areas. In assessing the transportation fuels market the analysis examined production and use of both conventional and new alternative motor fuels.

Hackworth, J.H.; Koch, R.W.

1995-07-01

389

Statistics of Natural Binaural Sounds  

PubMed Central

Binaural sound localization is usually considered a discrimination task, where interaural phase (IPD) and level (ILD) disparities at narrowly tuned frequency channels are utilized to identify a position of a sound source. In natural conditions however, binaural circuits are exposed to a stimulation by sound waves originating from multiple, often moving and overlapping sources. Therefore statistics of binaural cues depend on acoustic properties and the spatial configuration of the environment. Distribution of cues encountered naturally and their dependence on physical properties of an auditory scene have not been studied before. In the present work we analyzed statistics of naturally encountered binaural sounds. We performed binaural recordings of three auditory scenes with varying spatial configuration and analyzed empirical cue distributions from each scene. We have found that certain properties such as the spread of IPD distributions as well as an overall shape of ILD distributions do not vary strongly between different auditory scenes. Moreover, we found that ILD distributions vary much weaker across frequency channels and IPDs often attain much higher values, than can be predicted from head filtering properties. In order to understand the complexity of the binaural hearing task in the natural environment, sound waveforms were analyzed by performing Independent Component Analysis (ICA). Properties of learned basis functions indicate that in natural conditions soundwaves in each ear are predominantly generated by independent sources. This implies that the real-world sound localization must rely on mechanisms more complex than a mere cue extraction. PMID:25285658

Mlynarski, Wiktor; Jost, Jurgen

2014-01-01

390

Toward a new natural medicine.  

PubMed

Treatments summarized under the term "natural medicine," i.e., those offered as an alternative or in addition to conventional medicine, have enjoyed a surge in popularity in recent years. The "natural" descriptor employed in connection with these healing methods is frequently misunderstood, leading to underestimation of the risks arising from incorrect use. However, the essential principle underlying traditional natural medicine, mobilization of the body's own forces against disease, is increasingly being employed in a new, rational form of medicine: molecular medicine. A range of natural endogenous substances for medical use are already available. Human proteins such as erythropoietin can now be produced as medicines in highly pure form with the aid of genetic engineering techniques. Our increasing understanding of the function of our genes and the resulting descriptions of molecular mechanisms underlying disease are also helping us to utilize the body's own construction set. New techniques such as gene therapy will in future enable us to reproduce the natural conditions in the healthy body with increasing specificity in our attempts to cure illnesses. One such application will be the activation of the immune system to combat cancer. The complete decoding of the human genome will not only allow illnesses to be described, and possibly prevented, at an earlier stage. Illnesses will also be able to described more precisely and individually at the molecular level, opening up the possibility of targeted, patient-specific cures. PMID:9618687

Buckel, P

1998-04-01

391

College of Engineering EM Engineering Mechanics  

E-print Network

College of Engineering EM Engineering Mechanics KEY: # = new course * = course changed = course or concur: MA 213. EM 302 MECHANICS OF DEFORMABLE SOLIDS. (3 of Engineering or consent of chairperson, and EM 221; prereq or concur: MA 214. EM 313 DYNAMICS. (3

MacAdam, Keith

392

Magnetic Properties of the Basalt in Hole EM 7, Mohole Project  

Microsoft Academic Search

The average direction of the remanent magnetization of the basalt layer at the bottom of hole EM 7 is inclined 36 ø above tile horizontal, indicating that the layer is reversely magnetized. Detailed demagnetization experiments with alternating magnetic fields to 800 oer- steds peak intensity indicate that the drilling operations did not remagnetize the basalts. The natural magnetization is extremely

Allan Cox; Richard R. Doell

1962-01-01

393

Investimento ambiental em indústrias sujas e intensivas em recursos naturais e energia  

Microsoft Academic Search

O crescimento industrial brasileiro, a partir do final dos anos setenta, ocorreu com o aumento da participação de indústrias intensivas em recursos naturais, em detrimento da participação de indústrias intensivas em trabalho e dos setores intensivos em atividades tecnológicas mais complexas. Essas transformações, tornando o setor de bens intermediários dominante na estrutura industrial, implicaram em consideráveis mudanças tanto de ordem

Frederico Cavadas Barcellos; Jurandir Carlos de Oliveira; Paulo Gonzaga Mibielli de Carvalho

2009-01-01

394

Natural gas monthly, February 1997  

SciTech Connect

This issue of the Natural Gas Monthly presents estimates of natural gas supply and consumption through February 1997. Estimates of natural gas prices are through November 1996 except electric utility prices that are through October 1996. Cumulatively for January through February 1997, the daily average rates for several data series remain close to those of 1996. (Comparing daily rates accounts for the fact that February 1996 had 29 days.) Daily total consumption for January through February is estimated to be 83 billion cubic feet per day, 1 percent higher than during the same period in 1996. Similarly, the estimate of average daily production of 53 billion cubic feet is 1.5 percent higher than in 1996, while daily net imports during the first 2 months of 1997 are virtually unchanged from 1996.

NONE

1997-02-01

395

Natural gas monthly, February 1993  

SciTech Connect

This issue contains monthly data for the entire year 1992 and allows comparing this year with the previous years. Marketed production of natural gas remained at approximately the same level as in 1991, 18.6 trillion cubic feet. Marketed production has changed very little in the past 3 years, with only a 3-percent difference since 1989. Consumption of natural gas has also increased each year for the past 7 years. In 1992, the level of consumption increased by approximately 4 percent from the previous years. Imports have steadily increased over the past 7 years. Imports of natural gas in 1992 are approximately 16 percent above the 1991 level. The Iroquois Gas Transmission Line, extending from the Canadian border in New York to Long Island, accounts for a large part of this increase. This pipeline went into service in December 1991.

Not Available

1993-02-26

396

Natural GUT and the cosmology  

SciTech Connect

In the natural GUT, not only realistic quark and lepton mass matrices can be obtained but also the most serious problem in the SUSY GUT, which is called the doublet-triplet splitting problem, can be solved under the natural assumption that all the interactions which are allowed by the symmetry are introduced with O(1) coefficients (including the higher dimensional operators). In this manuscript, we examine several cosmological aspects which are related with the natural GUT, B - L-genesis, non-thermal production of dark matter (DM), vacuum selection by particle production, and the inflation after the trapping. These works are based on several papers[1, 2, 3] collaborated with S. Enomoto, S. Iida, Y. Kurata, and T. Matsuda.

Maekawa, Nobuhiro [Nagoya Univ. Kobayashi-Maskawa Institute, Nagoya 464-8602 and Nagoya Univ. Department of Physics, Nagoya 464-8602 (Japan)

2012-07-27

397

Synthesis of Polycyclic Natural Products  

SciTech Connect

With the continuous advancements in molecular biology and modern medicine, organic synthesis has become vital to the support and extension of those discoveries. The isolations of new natural products allow for the understanding of their biological activities and therapeutic value. Organic synthesis is employed to aid in the determination of the relationship between structure and function of these natural products. The development of synthetic methodologies in the course of total syntheses is imperative for the expansion of this highly interdisciplinary field of science. In addition to the practical applications of total syntheses, the structural complexity of natural products represents a worthwhile challenge in itself. The pursuit of concise and efficient syntheses of complex molecules is both gratifying and enjoyable.

Tuan Hoang Nguyen

2003-05-31

398

Hegel's notion of natural purpose.  

PubMed

This paper argues that the notion of natural purpose developed by Hegel can only be thoroughly grasped by considering its intimate connection with the idea of contradiction and, particularly, with what Hegel in his philosophy of nature called the 'activity of deficiency'. This expression is used by Hegel to denote the ontological situation of every living being, which is embodied most authentically in the concepts of need and drive. For Hegel, life itself is imbued with contradiction because it is inextricably bound up with what it lacks: its identity is at one with its negation. This paper defends the thesis that Hegel's philosophy-and not just his philosophy of nature-can be characterized as an 'ontology of life' (to use the same expression that Martin Heidegger applied to Aristotle's De Anima), or more precisely, as an ontology of living individuality. PMID:22326082

Michelini, Francesca

2012-03-01

399

Natural radioactivity in Spanish soils  

SciTech Connect

The program of studies and surveys of natural radiation and radioactivity in Spain organized by our research group at the end of the 1980s included a 4-y national survey to determine the concentrations of natural radionuclides in soil. Results obtained from measurements of soil samples collected nationwide at >900 sampling sites are reported and discussed in this paper. Correlations between absorbed dose rates in air calculated from natural radionuclide concentrations in soil and terrestrial gamma dose rates measured experimentally outdoors are shown for the different autonomous regions of Spain. Assessment is also made of the dose to the Spanish population from outdoor exposure to terrestrial gamma rays. 26 refs., 5 figs., 2 tabs.

Quindos, L.S.; Fernandez, P.L.; Soto, J. [Univ. of Cantabria, Santander (Spain)] [and others

1994-02-01

400

Natural gas monthly, August 1996  

SciTech Connect

This analysis presents the most recent data on natural gas prices, supply, and consumption from the Energy Information Administration (EIA). The presentation of the latest monthly data is followed by an update on natural gas markets. The markets section examines the behavior of daily spot and futures prices based on information from trade press, as well as regional, weekly data on natural gas storage from the American Gas Association (AGA). This {open_quotes}Highlights{close_quotes} closes with a special section comparing and contrasting EIA and AGA storage data on a monthly and regional basis. The regions used are those defined by the AGA for their weekly data collection effort: the Producing Region, the Consuming Region East, and the Consuming Region West. While data on working gas levels have tracked fairly closely between the two data sources, differences have developed recently. The largest difference is in estimates of working gas levels in the East consuming region during the heating season.

NONE

1996-08-01

401

The Human Relation With Nature and Technological Nature  

E-print Network

-- technologies that in various ways mediate, augment, or simulate the natural world. Entire television networks Tycoon engage children with animal life. Zoos themselves are bringing technologies such as webcams into their exhibits so that we can, for example, watch animals from the leisure of our home or a cafe´. Inexpensive

Kahn, Peter H.

402

On adventure therapy and the natural worlds: Respecting nature's healing  

Microsoft Academic Search

Some forms of adventure therapy and adventure programming rely heavily on the outdoors to achieve their objectives of client change. Due to the dominant paradigm in psychology and psychotherapy, the natural worlds are not always considered to be a factor in the curative relationship, the effectiveness of therapeutic interventions being credited to program design, facilitation, and small group dynamics, among

Almut Beringer; Peter Martin

2003-01-01

403

Nature Macmillan Publishers Ltd 1997 letters to nature  

E-print Network

. Fraser, W. R., Trivelpiece, W. Z., Ainely, D. G. & Trivelpiece, S. G. Increases in Antarctic penguin­531 (1992). 13. Fraser, W. R. & Trivelpiece, W. Z. in Foundations for Ecological Research West 1997. 1. Marr, J. W. S. The natural history and geography of the Antarctic krill (Euphausia superba

Born, Richard

404

Nature Macmillan Publishers Ltd 1997 letters to nature  

E-print Network

of silica at room temperature. Nature 347, 267­269 (1990). 9. Meade, C., Hemley, R. J. & Mao, H. K. High for point defect mechanisms. J. Appl. Phys. 70, 5323­5345 (1991). 12. Spaepen, F. & Turnbull, D. in Laser is reminiscent of collision theory26 . High pressure may thus represent an opportunity for condensed- matter

405

Nature Macmillan Publishers Ltd 1998 letters to nature  

E-print Network

.nature.com In the non-mycorrhizal control, there was less than 3 m g-1 non-mycorrhizal hyphae; this represents a background count of non-mycorrhizal fungi in each treatment. In the non-mycorrhizal control treatments. & Read, D. J. Mycorrhizal Symbiosis 2nd edn (Academic, San Diego, 1997). 17. Grime, J. P., Mackey, J. M

Carrasco, Marisa

406

The function of terpene natural products in the natural world  

Microsoft Academic Search

As the largest class of natural products, terpenes have a variety of roles in mediating antagonistic and beneficial interactions among organisms. They defend many species of plants, animals and microorganisms against predators, pathogens and competitors, and they are involved in conveying messages to conspecifics and mutualists regarding the presence of food, mates and enemies. Despite the diversity of terpenes known,

Natalia Dudareva; Jonathan Gershenzon

2007-01-01

407

2010 The Natural Step Accelerating change  

E-print Network

The Natural Step "Ho fatto un sogno ..." #12;© 2010 The Natural Step "Think globally, act locally globalmente, agire localmente ... #12;© 2010 The Natural Step "Think globally, act locally... " Chi paga la

Schenato, Luca

408

31 CFR 540.309 - Natural uranium.  

...ASSETS CONTROL REGULATIONS General Definitions § 540.309 Natural uranium. The term natural uranium means uranium found in nature, with an average concentration of 0.711 percent by weight of the isotope...

2014-07-01

409

Deweyan Naturalism: A Critique of Epistemic Reductionism  

E-print Network

is the orthodox position for most contemporary, Anglo-American philosophy. Many philosophers within this tradition are dissatisfied with scientific naturalism and attempt to critique scientific naturalism from the perspective of "liberal" naturalism. One major...

Tucker, Richard Thorp

2012-07-16

410

Introduction to the Nature Journal  

NSDL National Science Digital Library

This Smithsonian in Your Classroom is the third in a three-part series that brings together writing and other disciplines. In the lessons here, students exercise the observation skills that are essential to writing, visual art, and science. First, they try to use evocative language in describing pictures of birds from the SmithsonianâÂÂs National Zoo. They go on to record observations and to make hypotheses as they follow the behavior of animals on the National ZooâÂÂs live webcams. They can watch the giant pandas, the tigers, the cheetahs, the gorillas, or any of a dozen other species.These classroom activities are intended as a preface or complement to a project increasingly popular in elementary and middle schoolsâÂÂthe keeping of nature journals, whether on class outings or when the students are on their own. Included in the issue are words of advice for students from journal-keeping Smithsonian naturalists.The term nature journal seems to resist definition until we realize that the broadest definitions all apply. In Keeping a Nature Journal, the most popular recent book on the subject, Clare Walker Leslie puts it simply: âÂÂwhereas a diary or personal journal records your feelings toward yourself and others, a nature journal primarily records your responses to and reflections about the world of nature around you.âÂÂWith a subject as great as all outdoors, nature journals lend themselves to a wide range of expression. Sketches are often the most immediate way to capture the way things look. Deeper, written observations can be the basis for all kinds of creative writing.

2010-12-17

411

Natural Milli-Charged Inflation  

E-print Network

We construct a natural inflation model with the inflaton as a linear combination of the fifth components of Abelian gauge fields in a five-dimensional theory. A seesaw mechanism is introduced to provide a natural milli-charge for matter fields under one combination of the gauge symmetries. As a result, the effective decay constant of the inflaton field can be above the Planck scale with all scales in the model below the Planck scale. Our model predicts a tensor-to-scalar ratio r between 0.033 and 0.125 for sixty e-folds and a reheating temperature of a few 10^11 GeV.

Yang Bai; Ben A. Stefanek

2014-05-26

412

North American Natural Gas Markets  

SciTech Connect

This report summarizes die research by an Energy Modeling Forum working group on the evolution of the North American natural gas markets between now and 2010. The group's findings are based partly on the results of a set of economic models of the natural gas industry that were run for four scenarios representing significantly different conditions: two oil price scenarios (upper and lower), a smaller total US resource base (low US resource case), and increased potential gas demand for electric generation (high US demand case). Several issues, such as the direction of regulatory policy and the size of the gas resource base, were analyzed separately without the use of models.

Not Available

1989-02-01

413

North American Natural Gas Markets  

SciTech Connect

This report sunnnarizes the research by an Energy Modeling Forum working group on the evolution of the North American natural gas markets between now and 2010. The group's findings are based partly on the results of a set of economic models of the natural gas industry that were run for four scenarios representing significantly different conditions: two oil price scenarios (upper and lower), a smaller total US resource base (low US resource case), and increased potential gas demand for electric generation (high US demand case). Several issues, such as the direction of regulatory policy and the size of the gas resource base, were analyzed separately without the use of models.

Not Available

1988-12-01

414

Nature: Web Specials: Sheep Cloning  

NSDL National Science Digital Library

_Nature_, the "international weekly journal of science," has created a web page to accompany the ground-breaking letter it published in the February 27, 1997 issue: "Viable offspring derived from fetal and adult mammalian cells," by I. Wilmut, et al. The letter is available, as well as a Nature Opinion piece, and short articles of commentary by Axel Kahn of the INSERM Laboratory of Research on Genetics and Molecular Pathology at the Cochin Institute of Molecular Genetics, Paris, and Colin Stewart of the NCI-Frederick Cancer Research and Development Center, Frederick, Maryland. Note that the site is free, but registration is required.

1997-01-01

415

Enantiomeric Natural Products: Occurrence and Biogenesis**  

PubMed Central

In Nature, chiral natural products are usually produced in optically pure form; however, on occasion Nature is known to produce enantiomerically opposite metabolites. These enantiomeric natural products can arise in Nature from a single species, or from different genera and/or species. Extensive research has been carried out over the years in an attempt to understand the biogenesis of naturally occurring enantiomers, however, many fascinating puzzles and stereochemical anomalies still remain. PMID:22555867

Finefield, Jennifer M.; Sherman, David H.; Kreitman, Martin; Williams, Robert M.

2012-01-01

416

Fondation IPSEN, Nature Medicine and Nature Immunology present: An Emergence & Convergence mini-symposium  

E-print Network

Fondation IPSEN, Nature Medicine and Nature Immunology present: An Emergence & Convergence mini, UK) Larry Steinman (Stanford University, USA) ORGANIZERS: Eva Chmielnicki (Nature Medicine, USA) Laurie Dempsey (Nature Immunology, USA) Yves Christen (Fondation IPSEN, France) Application and Abstract

Cai, Long

417

The geography of nature access opportunities.  

E-print Network

??Experiences in natural environments are perceived as a human necessity. Additionally, prior studies show that nature access has emotional, cognitive, and psychological benefits for children.… (more)

Knight, Jonathan E.

2012-01-01

418

Costs to transport natural gas  

Microsoft Academic Search

Relative Economics are discussed for transporting natural gas by four ways: converting to LNG and using LNG tankers, as a gas using on-land and subsea pipelines, converting to methanol and using conventional tankers, and compressing and using tankers with pressurized containers. Distances and routes are important factors when determining cost. Specific examples are given for transportation between : Arabian Gulf

I. Leibson; S. T. Davenport; M. H. Muenzier

1987-01-01

419

Natural products as antibacterial agents  

Microsoft Academic Search

For thousands of years medicinal plants have played a significant role in the treatment of a wide range of medical conditions, including infectious diseases. Some naturally occurring chemical compounds serve as models for a large percentage clinically proven drugs, and many are now being re-assessed as antimicrobial agents. The primary reason for this renaissance is the fact that infectious disease

Gail B. Mahady; Yue Huang; Brian J. Doyle; Tracie Locklear

2008-01-01

420

Nutrient enrichment of natural waters  

Microsoft Academic Search

Evidence is presented to show the numerous sources of nutrient enrichment of natural waters. Factors affecting soil and water losses and their relationship to water pollution are discussed. The value and use of soil maps in predicting potential areas of water pollution from runoff and erosion is discussed. Small scale maps of the world are used to show how soil

A. A. Klingebiel

1973-01-01

421

Natural history museums and cyberspace  

USGS Publications Warehouse

Natural history museums are entering the electronic age as they increasingly use computers to build accessible and shareable databases that support research and education on a world-wide basis. Museums are exploring the Internet and other shared uses of electronic media to enhance their traditional roles in education, training, identifications, technical assistance, and collections management.

Wemmer, C.; Erixon-Stanford, M.; Gardner, A.L.

1996-01-01

422

Integrating the Nature of Science  

ERIC Educational Resources Information Center

The nature of science (NOS) describes what science is and how knowledge in science is developed (NSTA 2013). To develop elementary students' understandings of how scientists explore the world, the authors--an education professor and a third-grade teacher--endeavored to integrate NOS into a third-grade life science unit. Throughout the lesson,…

Weiland, Ingrid; Blieden, Katherine; Akerson, Valarie

2014-01-01

423

NATURAL RESOURCES CONSERVATION WATER RESOURCES  

E-print Network

NATURAL RESOURCES CONSERVATION WATER RESOURCES For students entering after 8/2010 Freshman Fall. & Mgt. 3 NRC 261 Wildlife Cons. 3 NRC 297F Fish Sampling & Ident. 1 Plant/Animal I.D. elective 2 1/2 BCT) 2. Plant/Animal I.D. elective ­ NRC 212 Forest Tree & Shrub I.D. (f), 211 Wildlife Sampling & I

Massachusetts at Amherst, University of

424

Natural language processing information retrieval  

E-print Network

Natural language processing for information retrieval David D. Lewis AT&T Bell Laboratories Karen with `end' text. We will however use information retrieval (IR), sometimes taken to mean document retrieval the essential properties of document retrieval and reviews both conventional practice and research findings

Haddadi, Hamed

425

NATURAL ATTENUATION OF CHLORINATED SOLVENTS  

EPA Science Inventory

The protocol will simply describe in detail, with references and illustrations, the approach currently used by staff of the SPRD to evaluate natural attenuation of chlorinated solvents in ground water. Staff of SPRD, and staff of the Air Force Center for environmental excellence...

426

The perception of natural contour  

Microsoft Academic Search

The observation that natural curves and surfaces are often fractal suggests that people may be sensitive to their statistical properties. The perceptual protocols that underlie discrimination be- tween fractals and between other types of random contour and fractals are examined. Discrimina- tion algorithms that have precisely the same sensitivities as human observers are constructed. These algorithms do not recognize the

David L. Gilden; Mark A. Schmuckler; Keith Clayton

1993-01-01

427

SAR simulation of natural landscapes  

Microsoft Academic Search

This paper considers simulation of the SAR raw signal of natural landscapes. Within this framework, the format of the input data is critical. In fact, they are usually described by digital input maps which are too scarcely sampled for the application we are concerned. In the authors' case, they deal with digital elevation models, i.e., with the elevation input data.

G. Franceschetti; M. Migliaccio; D. Riccio

1994-01-01

428

A classification of natural rivers  

Microsoft Academic Search

A classification system for natural rivers is presented in which a morphological arrangement of stream characteristics is organized into relatively homogeneous stream types. This paper describes morphologically similar stream reaches that are divided into 7 major stream type categories that differ in entrenchment, gradient, width\\/depth ratio, and sinuosity in various landforms. Within each major category are six additional types delineated

David L. Rosgen

1994-01-01

429

Visualizing and quantifying natural selection  

Microsoft Academic Search

Modern methods of analysis are enabling researchers to study natural selection at a new level of detail. Multivariate statistical techniques can Identify specific targets of selection and provide parameter estimates that fit into equations for evolutionary change. A more Intuitive understanding of the form of selection can be provided through graphical representation of selection surfaces. Combinations of quantitative and visual

Edmund D. Brodie; Allen J. Moore; Fredric J. Janzen

1995-01-01

430

Nature Publishing Group Site Licenses  

E-print Network

Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer) Bone Marrow SITE LICENSES Nature Publishing Group Excelência científica e médica Palgrave Macmillan Journals Journal of Gastroenterology American Journal of Hypertension APS (Acta Pharmacologica Sinica) Asian

Cai, Long

431

Nature Publishing Group Site Licenses  

E-print Network

Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer) Bone Marrow SITE LICENSES Nature Publishing Group Vynikajúca vedecká a lekárska kvalita Palgrave Macmillan Journals Journal of Gastroenterology American Journal of Hypertension APS (Acta Pharmacologica Sinica) Asian

Cai, Long

432

Nature Publishing Group Site Licenses  

E-print Network

Sinica) Asian Journal of Andrology BDJ (British Dental Journal) BJC (British Journal of Cancer) Bone SITE LICENSES Nature Publishing Group Palgrave Macmillan Journals , SciBX: Science Business Group The American Journal of Gastroenterology American Journal of Hypertension APS (Acta Pharmacologica

Cai, Long

433

Natural Selection and Applied Genetics  

NSDL National Science Digital Library

Natural Selection and Applied Genetics is a graduate-level professional development course designed to enhance your understanding and teaching of life science. In two sessions, you will investigate life science topics using hands-on activities and online resources including video segments, interactive activities, readings, and other multimedia materials. These resources are drawn from Teachers' Domain, WGBH's digital library service.

2010-01-01

434

Wind Engineering & Natural Disaster Mitigation  

E-print Network

Wind Engineering & Natural Disaster Mitigation For more than 45 years, Western University has been internationally recognized as the leading university for wind engineering and wind- related research. Its of environmental disaster mitigation, with specific strengths in wind and earthquake research. Boundary Layer Wind

Denham, Graham

435

The Nature of Science Education  

ERIC Educational Resources Information Center

A number of studies have shown that spending time in nature produces cognitive benefits. What if a child's exposure to the out-of-doors is considered not just a beneficial extracurricular activity, but a fundamental building block to an elementary education in math and science? The Young Achievers Science and Math Pilot School operates a 9:30 a.m.…

Connors, Margaret M.; Perkins, Bill

2009-01-01

436

Preventing and Mitigating Natural Disasters  

NSDL National Science Digital Library

This report highlights the importance of developing and sharing information on natural hazards, ensuring that the disaster-management community, decision-makers and the public understand the risks posed by these hazards and recognize the onset of hazardous weather and its impact on safety and survival procedures.

437

THE NATURE OF MOUNTAIN GEOMORPHOLOGY  

Microsoft Academic Search

A century of study suggests many common characteristics in the geomorphic nature of high mountain areas. These include important structural influences in the landscape, usually on a variety of spatial scales; and contrasting climatic conditions (often confounded with vegetation distributions) which also exhibit a wide spatial variability. Most high mountain terrain also shows evidence of ancient erosion surfaces as well

NEL CAINE

1984-01-01

438

Natural products: DNA double whammy  

NASA Astrophysics Data System (ADS)

The lomaiviticins are exceedingly potent antibiotic agents, but the mechanism responsible for this activity has so far been unclear. Now, efficient generation of double-strand breaks in DNA by lomaiviticin A has been linked to the remarkable cytotoxicity of these diazobenzofluorene-containg natural products.

Gates, Kent S.

2014-06-01

439

The Work of Natural Killers  

NSDL National Science Digital Library

Second monthly installment of our "What A Year!" website project, introducing life science breakthroughs to middle and high school students and their teachers. This story looks at new understanding of and research into the role of natural killer T-cells in asthma.

2006-10-02

440

Denmark prepares for natural gas  

Microsoft Academic Search

Denmark will import natural gas from the German Ruhrgas network to reduce its dependence on oil, although oil will continue to be the major energy source. A national program of energy conservation includes conversion of oil-fired power statons to either coal or to a co-generation system with district heating and the increased use of gas to supply more of the

Jeffs

1979-01-01

441

LIQUEFIED NATURAL GAS IN CALIFORNIA  

E-print Network

Tyler Contributors Dave Maul Manager NATURAL GAS & SPECIAL PROJECTS OFFICE Terrence O'Brien, Deputy Director SYSTEMS ASSESMENTS & FACILITIES DIVISION Robert L. Therkelsen Executive Director James D. Boyd not discuss the regulation of LNG facility operations, gas pipeline construction and operation, gas quality

442

Natural gas monthly, March 1999  

SciTech Connect

This issue of the Natural Gas Monthly contains estimates for March 1999 for many natural gas data series at the national level. Estimates of national natural gas prices are available through December 1998 for most series. Highlights of the data contained in this issue are listed below. Preliminary data indicate that the national average wellhead price for 1998 declined to 16% from the previous year ($1.96 compared to $2.32 per thousand cubic feet). At the end of March, the end of the 1998--1999 heating season, the level of working gas in underground natural gas storage facilities is estimated to be 1,354 billion cubic feet, 169 billion cubic feet higher than at the end of March 1998. Gas consumption during the first 3 months of 1999 is estimated to have been 179 billion cubic feet higher than in the same period in 1998. Most of this increase (133 billion cubic feet) occurred in the residential sector due to the cooler temperatures in January and February compared to the same months last year. According to the National Weather Service, heating degree days in January 1999 were 15% greater than the previous year while February recorded a 5% increase.

NONE

1999-03-01

443

estry & Natural Resour PURDUE UNIVERSITY  

E-print Network

." These places attract tourists and bring tourism dollars into local communities. Your forest plays an important tourism dollars to the local economy. An important part of sustainable forest management is figuring out of Your Forest Ron Rathfon, Extension Forester, Department of Forestry and Natural Resources, Purdue

444

HANDLING HAZARDS OF NATURAL THORIUM  

Microsoft Academic Search

Data on the handling hazards of natural thorium are summarized. The ; external and internal hazards of its radiotoxicity are described. The chemical ; toxicity and pyrophoric and explosive characteristics of thorium and thorium ; hydride dusts are discussed. The following control measures are outlined: film ; badge usage, area monitoring, air monitoring, protective clothing, general house-; keeping and hygiene,

T. N. V. Pi; P. R. Kamath; S. Somasundaram

1959-01-01

445

Informatique Nature de la formation  

E-print Network

opérationnelle, recouvrant ainsi tous les grands domaines de l'Informatique : Algorithmique et Programmation, les structures de données, les bases de données Simuler, expliquer un programme informatique, etInformatique Nature de la formation : Diplôme national de l'Enseignement Supérieur Durée des études

Sart, Remi

446

2006 Nature Publishing Group CORRIGENDUM  

E-print Network

expression in the mouth, lower jaw and developing pelvis of marine larvae. Pitx1 expression appears normal in the pelvic region of the larval progeny of fish missing the pelvis. CORRIGENDUM doi:10.1038/nature04575, Enlarged views of the lateral head (c) and ventral pelvis (d) of stage-29 marine larvae; arrowheads

Shapiro, Mike

447

Natural gas monthly, January 1997  

SciTech Connect

This publication, the Natural Gas Monthly, presents the most recent data on natural gas supply, consumption, and prices from the Energy Information Administration (EIA). Of special interest in this issue are two articles summarizing reports recently published by EIA. The articles are {open_quotes}Natural Gas Productive Capacity{close_quotes} and {open_quotes}Outlook for Natural Gas Through 2015,{close_quotes} both of which precede the {open_quotes}Highlights{close_quotes} section. With this issue, January 1997, changes have been made to the format of the Highlights section and to several of the tabular and graphical presentations throughout the publication. The changes to the Highlights affect the discussion of developments in the industry and the presentation of weekly storage data. An overview of the developments in the industry is now presented in a brief summary followed by specific discussions of supply, end-use consumption, and prices. Spot and futures prices are discussed as appropriate in the Price section, together with wellhead and consumer prices.

NONE

1997-01-01

448

LAND USE AND NATURAL RESOURCES  

E-print Network

: Design Tools for Non-Design Professionals LEED Building Certification Overview of Environmental and community design, renewable energy, environmental quality and climate change. Yet, here I was, driving more in a white Cadillac. It was worth the trip. We in the Land Use and Natural Resources and Sustainability

Ferrara, Katherine W.

449

Natural Language Generation from Plans  

Microsoft Academic Search

This paper addresses the problem of designing a system that accepts a plan structure of the sort generated by AI planning programs and produces natural language text explaining how to execute the plan. We describe a system that generates text from plans produced by the NONLIN planner (Tate 1976).The results of our system are promising, but the texts still lack

Chris Mellish; Roger Evans

1989-01-01

450

Readings in natural language processing  

SciTech Connect

The book presents papers on natural language processing, focusing on the central issues of representation, reasoning, and recognition. The introduction discusses theoretical issues, historical developments, and current problems and approaches. The book presents work in syntactic models (parsing and grammars), semantic interpretation, discourse interpretation, language action and intentions, language generation, and systems.

Grosz, B.J.; Jones, K.S.; Webber, B.L.

1986-01-01

451

The Nature of Mathematics Anxiety.  

ERIC Educational Resources Information Center

This paper attempts to generate a comprehensive description of the nature of mathematics anxiety through a synthesis of: (1) the general and test anxiety literatures applied to mathematics anxiety; (2) the mathematics anxiety literature, and (3) case studies developed through in-depth interviews. The indepth interviews were conducted with seven…

Cemen, Pamala Byrd

452

NATURAL FREEZING SURVIVAL IN ANIMALS  

Microsoft Academic Search

Natural freeze-tolerance supports the winter survival of many animals including numerous terrestrial insects, many intertidal marine invertebrates, and selected species of terrestrially hibernating amphibians and reptiles. Freeze-tolerant an- imals typically endure the conversion of 50% or more of total body water into extracellular ice and employ a suite of adaptations that counter the negative con- sequences of freezing. Specific adaptations

Kenneth B. Storey; Janet M. Storey

1996-01-01

453

Maternal-Infant Attachment, Naturally  

PubMed Central

In answer to a reader's question about the necessity of prenatal sonograms, this column asserts that, unl there is a serious medical problem, mothers should depend less on technology and more on their natural abilities to foster the all-important bond with their babies. PMID:22946010

Lothian, Judith A

1999-01-01

454

Modeling Natural Variation through Distribution  

ERIC Educational Resources Information Center

This design study tracks the development of student thinking about natural variation as late elementary grade students learned about distribution in the context of modeling plant growth at the population level. The data-modeling approach assisted children in coordinating their understanding of particular cases with an evolving notion of data as an…

Lehrer, Richard; Schauble, Leona

2004-01-01

455

Natural Sciences Tripos EARTH SCIENCES  

E-print Network

Natural Sciences Tripos EARTH SCIENCES University of Cambridge Undergraduate Prospectus 2013.indd 1Undergraduate Prospectus 2013.indd 1 29/07/2013 16:44:3529/07/2013 16:44:35 #12;Department of Earth Sciences in the future? These are some of the big questions that we seek to answer in our courses on Earth Sciences

Cambridge, University of

456

Understanding natural gas price decontrol  

Microsoft Academic Search

A variety of analyses concerning the natural gas market and the economy, and their reactions to change in gas prices, have been produced by government agencies, academic researchers, and consumer and industry groups. These analyses often display conflicting results because of their choices of perspective and assumptions. In response to a request from the House Subcommittee on Fossil and Synthetic

T. J. Considine; M. D. Deich; E. M. Ehrlich; P. C. Webre; P. H. ed. Johnston

1983-01-01

457

Climbing Robots in Natural Terrain  

Microsoft Academic Search

This paper presents a general framework for plan- ning the quasi-static motion of climbing robots. The framework is instantiated to compute climbing motions of a three-limbed robot in vertical natural terrain. An example resulting path through a large simulated environment is presented. The planning problem is one of five fundamental challenges to the development of real robotic systems able to

Timothy Bretl; Teresa Miller; Stephen Rock Jean-Claude Latombe

2003-01-01

458

Behaviorism and Naturalism* Gary Hatfield  

E-print Network

permitted mentalistic terms such as 'purpose' in behavioral description, and posited intervening processesBehaviorism and Naturalism* Gary Hatfield University of Pennsylvania Behaviorism was a peculiarly and endeavoring to define or redefine its tenets. Behaviorism expressed the naturalistic bent in American thought

Hatfield, Gary

459

Occupational Analysis: Natural Resources Technician  

NSDL National Science Digital Library

The Advanced Technology Environmental and Energy Center (ATEEC) has provided this document which includes an overview of general required competencies for natural resources technicians. Suggested general areas of competence and specific tasks within each area are provided. Users must download this resource for viewing, which requires a free log-in. There is no cost to download the item.

2011-03-04

460

The state of natural gas  

Microsoft Academic Search

As global energy demand rises, natural gas now plays an important strategic role in energy supply. It is more difficult to transport and store gas than oil and consequently it lagged behind that commodity for a considerable period. Over the last couple of decades this has changed and gas markets continue to expand more rapidly than those of other fossil

Michael J. Economides; David A. Wood

2009-01-01

461

On the wave nature of matter  

E-print Network

Following the spirit of de Broglie and Einstein, we think the concepts of matter and radiation should be unified. In part 1, we examine the physical nature of matter wave. We propose that: (1) Like the photon, a particle is not a point-like object; instead, it behaves like a wave packet. (2) Like the photon, the matter wave of a particle is an excitation of a real physical field. (3) Different types of particles are different excitation modes of a unified field in the vacuum. We demonstrate that this model can provide a simpler explanation to many physical observations than the current theories. In part 2, we examine the origin of mass and the mass-energy relation. If matters are composed of waves, where does their mass come from? This problem can be solved by treating the rest mass on the same footing as energy and momentum. We hypothesize that, since the vacuum field behaves like an EM field in the long range (>1 fm), the wave equation of a free particle in the asymptotic region is similar to the Maxwell equation, which can be solved using the technique of separation of variables. Using the correspondence principle, our solution suggests that the rest mass of a particle is associated with a "transverse wave number". Results of this work have several important implications. First, we found that the relativistic relationship between energy, momentum and mass can be derived from the dispersion relation of the wavefunction of a free particle. Second, the wave equation describing the longitudinal component of the wavefunction is identical in form to the Klein-Gordon equation. This work suggests that relativity and quantum mechanics can have a common theoretical origin in wave mechanics.

Donald C. Chang

2005-05-02

462

The surface learned from nature  

NASA Astrophysics Data System (ADS)

In this work, I would like to introduce the emerging surface of nature. The surface in nature, has the multi and optimized function with well organized structure. There are so many examples that we learn and apply to technology. First example is self-cleaning surface. Some plants (such as lotus leaf, taro leaf) and the wings of many large-winged insects (such as moth, butterfly, dragonfly) remain their surface clean in the very dirty environment. This self cleaning effect is accomplished by the superhydrophobic surfaces which exhibit the water contact angle of more than 150° with low sliding angle. Generally, the superhydrophobic surface is made up the two factors. One is the surface composition having the low surface tension energy. The other is the surface morphology of hierarchical structure of micro and nano size. Because almost nature surface have the hierarchical structures range from macro to nano size, their topography strength their function to adjust the life in nature environment. The other example is the surface to use for drag reduction. The skin friction drag causes eruptions of air or water resulting in greater drag as the speed is increased. This drag requires more energy to overcome. The shark skin having the fine sharp-edged grooves about 0.1 mm wide known riblet reduces in skin friction drag by being far away the vortex. Among a lot of fuctional surface, the most exciting surface the back of stenocara a kind of desert beetles. Stenocara use the micrometre-sized patterns of hydrophobic, wax-coated and hydrophilic, non-waxy regions on their backs to capture water from fog. This fog-collecting structure improves the water collection of fog-capture film, condenser, engine, and future building. Here, the efforts to realize these emerging functional surfaces in nature on technology are reported with the fabrication method and their properties, especially for the control of surface wettability.

Lim, H.; Kim, W. D.

2010-07-01

463

Illicit Trafficking of Natural Radionuclides  

NASA Astrophysics Data System (ADS)

Natural radionuclides have been subject to trafficking worldwide, involving natural uranium ore (U 238), processed uranium (yellow cake), low enriched uranium (<20% U 235) or highly enriched uranium (>20% U 235), radium (Ra 226), polonium (Po 210), and natural thorium ore (Th 232). An important prerequisite to successful illicit trafficking activities is access to a suitable logistical infrastructure enabling an undercover shipment of radioactive materials and, in case of trafficking natural uranium or thorium ore, capable of transporting large volumes of material. Covert en route diversion of an authorised uranium transport, together with covert diversion of uranium concentrate from an operating or closed uranium mines or mills, are subject of case studies. Such cases, involving Israel, Iran, Pakistan and Libya, have been analyzed in terms of international actors involved and methods deployed. Using international incident data contained in the Database on Nuclear Smuggling, Theft and Orphan Radiation Sources (DSTO) and international experience gained from the fight against drug trafficking, a generic Trafficking Pathway Model (TPM) is developed for trafficking of natural radionuclides. The TPM covers the complete trafficking cycle, ranging from material diversion, covert material transport, material concealment, and all associated operational procedures. The model subdivides the trafficking cycle into five phases: (1) Material diversion by insider(s) or initiation by outsider(s); (2) Covert transport; (3) Material brokerage; (4) Material sale; (5) Material delivery. An Action Plan is recommended, addressing the strengthening of the national infrastructure for material protection and accounting, development of higher standards of good governance, and needs for improving the control system deployed by customs, border guards and security forces.

Friedrich, Steinhäusler; Lyudmila, Zaitseva

2008-08-01

464

The nature of nature: how New Zealand women in middle to later life experience nature-based leisure  

Microsoft Academic Search

This article explores how women in middle to later life from Aotearoa-New Zealand understand and experience nature in the context of their outdoor leisure. Using a qualitative gender-informed methodology, multiple interviews were conducted with 11 women. Three key themes were revealed: First, nature was more than words, with women transgressing mechanistic conceptions of nature. Second, nature was understood as a

Margaret Cosgriff; Donna E Little; Erica Wilson

2010-01-01

465

The Nature of Nature: How New Zealand Women in Middle to Later Life Experience Nature-Based Leisure  

Microsoft Academic Search

This article explores how women in middle to later life from Aotearoa-New Zealand understand and experience nature in the context of their outdoor leisure. Using a qualitative gender-informed methodology, multiple interviews were conducted with 11 women. Three key themes were revealed: First, nature was more than words, with women transgressing mechanistic conceptions of nature. Second, nature was understood as a

Marg Cosgriff; Donna E. Little; Erica Wilson

2009-01-01

466

Natural and nature-inspired semiconductors for organic electronics  

NASA Astrophysics Data System (ADS)

Herein we report our recent efforts in employing natural materials and synthetic derivatives of natural molecules for organic field effect transistors (OFETs) and organic photovoltaics (OPVs). We evaluated dyes from the following chemical families: acridones, anthraquinones, carotenoids, and indigoids. These materials have proven effective in organic field effect transistors, with mobilities in the 4 × 10-4 - 0.2 cm2/V-s range, with indigoids showing promising ambipolar behavior. We fabricated complementary-like voltage inverters with high gains using indigoids. The photovoltaic properties of these materials were characterized in metal-insulator-metal (MIM) diodes, as well as in donoracceptor bilayer devices. Additionally, we have found that indigoids and Quinacridone, show long-range crystalline order due to hydrogen binding, and have considerably higher relative permittivities (?) compared to typical organic semiconductors. Higher permittivities result in lower exciton binding energies and thus may lead to high photocurrents in photovoltaic devices.

Glowacki, Eric Daniel; Leonat, Lucia; Voss, Gundula; Bodea, Marius; Bozkurt, Zeynep; Irimia-Vladu, Mihai; Bauer, Siegfried; Sariciftci, Niyazi Serdar

2011-10-01

467

SUPPLEMENTARY INFORMATION 1www.nature.com/nature  

E-print Network

and UPR signaling under tunicamycin-induced ER stress. a, Cellular localization of Ire1-mCherry and HAC1U1-localization of HAC1 mRNA in Ire1 foci depicted in a histogram (means +/- s.e.m., n = 2-5). c, Northern blot of HAC1 m.1038/nature07641 Figure S3 | Oligomerization of Ire1 is a prerequisite for efficient HAC1 mRNA recruitment

Walter, Peter

468

Consumers of natural health products: natural-born pharmacovigilantes?  

Microsoft Academic Search

BACKGROUND: Natural health products (NHPs), such as herbal medicines and vitamins, are widely available over-the-counter and are often purchased by consumers without advice from a healthcare provider. This study examined how consumers respond when they believe they have experienced NHP-related adverse drug reactions (ADRs) in order to determine how to improve current safety monitoring strategies. METHODS: Qualitative semi-structured interviews were

Rishma Walji; Heather Boon; Joanne Barnes; Zubin Austin; Sandy Welsh; G Ross Baker

2010-01-01

469

Type I natural killer T cells: naturally born for fighting  

Microsoft Academic Search

Type ? natural killer T cells (NKT cells), a subset of CD1d-restricted T cells with invariant V?? TCR, are characterized by prompt production of large amounts of Th1 and\\/or Th2 cytokines upon primary stimulation through the TCR complex. The rapid release of cytokines implies that type ? NKT cells may play a critical role in modulating the upcoming immune responses,

Jin-quan Tan; Wei Xiao; Lan Wang; Yu-ling He

2010-01-01

470

EFT naturalness: an effective field theory analysis of Higgs naturalness  

E-print Network

We investigate naturalness in the Standard Model (SM) Higgs sector in the presence of new heavy physics with typical scale \\Lambda, below which the SM is assumed to be valid. We use effective field theory (EFT) techniques to determine the conditions under which the 1-loop corrections to m_h from the heavy physics can balance those created by SM loop effects, a condition we denote by "EFT naturalness". We obtain the higher dimensional (n \\ge 5) operators in the effective Lagrangian that can lead to EFT naturalness, and classify the underlying heavy theories that can generate such operators at tree-level. In particular, we show that such heavy physics models must contain one or more singlet or triplet heavy bosons or else a singlet, doublet or triplet fermions. We also discuss the experimental constraints on the effective operators and find that if the scale of new physics is hh (V=W,Z) and \\psi \\psi --> hh (\\psi is a SM quark or lepton), or in h+quark(jet) or h+lepton(\\ell or \

Shaouly Bar-Shalom; Amarjit Soni; Jose Wudka

2014-05-12

471

letters to nature NATURE |VOL 405 |11 MAY 2000 |www.nature.com 187  

E-print Network

the responses of rat sensory neurons to noxious heat and capsaicin. J. Neurosci. 19, 10647±10655 (1999). 13. Nagy, J. I. & Kooy, D. van der. Effects of neonatal capsaicin treatment on nociceptive thresholds. & Julius, D. A capsaicin-receptor homologue with a high threshold for noxious heat. Nature 398, 436

Bergles, Dwight

472

letters to nature NATURE |VOL 410 |22 MARCH 2001 |www.nature.com 453  

E-print Network

. Sci. 23, 1107±1120 (1983). 2. Forty, A. J. Corrosion micromorphology of noble metal alloys and pitting corrosion of binary alloys. Nature 350, 216±219 (1991). 6. Newman, R. C. & Sieradzki, K. Metallic Corrosion. Science 263, 1708±1709 (1994). 7. Li, R. & Sieradzki, K. Ductile-brittle transition in random

Howat, Ian M.

473

letters to nature 172 NATURE |VOL 405 |11 MAY 2000 |www.nature.com  

E-print Network

makes thinner diatoms. Nature 393, 733±734 (1998). 2. Nelson, D. M., Tre�guer, P., Brzezinski, M. A of the tropical and Antarctic Ocean: grazing vs iron hypothesis. Oceanol. Acta 15, 145±162 (1992). 7. Clowes, A. J of the Southern Ocean. Polar Biol. 20, 259±272 (1998). 10. Davis, C. O. Continuous culture of marine diatoms under

Alfè, Dario

474

letters to nature 882 NATURE |VOL 406 |24 AUGUST 2000 |www.nature.com  

E-print Network

cultures of oceanic phytoplankton have been observed to increase the production of total dissolved' organic ligands play in controlling Cu toxicity in natural waters. Sulphur complexation may have (acid volatile sulphides) will provide a pool of sulphides available for complexa- tion and metal

Hutchings, Jeffrey A.

475

letters to nature NATURE |VOL 411 |3 MAY 2001 |www.nature.com 69  

E-print Network

-collected colonies were determined using a Carlo Erba NA1500 NCS system. For Trichodesmium chlorophyll biomass and determination of chlorophyll per trichome and per colony at each station. Trichodesmium biomass cycle and its in¯uence on the biological sequestration of CO2 in the ocean. Nature 387, 272±275 (1997

Lee, Cin-Ty Aeolus

476

Calibration case study of natural source electromagnetic array data recorded over a well in Oregon  

SciTech Connect

Natural field electromagnetic acquired conventionally, at a number of sparsely spaced single sites, can suffer from spatial aliasing and significant distortive shallow effects which severely limit its geophysical applications. A new mode of data acquisition which measures the electric field continuously along a profile has been developed by F.X. Boxtick. These data can be processed to remove shallow effects while maintaining the deep penetration characteristics of the natural electromagnetic (EM) fields. Processing and modeling techniques for such data are discussed and demonstrated on both synthetic and field data. Very good agreement with actual borehole data is demonstrated.

Shoemaker, C.L.; Shoham, Y.; Hockey, R.

1989-02-01

477

Natural Gas 1998: Issues and Trends  

NSDL National Science Digital Library

The EIA attributes a more competitive industry and increases in pipeline capacity as major factors affecting increased natural gas demand in Natural Gas 1998: Issues and Trends. According to this recently released report, Natural gas demand has increased in the United States by fourteen percent since 1990 and electric utility consumption of natural gas rose about seventeen percent from 1990 to 1998.

478

DEPARTMENT OF HUMAN DIMENSIONS OF NATURAL RESOURCES  

E-print Network

CODE DEPARTMENT OF HUMAN DIMENSIONS OF NATURAL RESOURCES College of Natural Resources Colorado ............................................................................. 7 B. Selection and Appointment of New or Replacement Faculty .................... 7 C. Procedures;3 DEPARTMENT OF NATURAL HUMAN DIMENSIONS OF NATURAL RESOURCES CODE ARTICLE I. GOAL AND OBJECTIVES A. DEPARTMENT

479

Natural regulatory T cells in infectious disease  

Microsoft Academic Search

This review discusses the control exerted by natural CD4+ CD25+ regulatory T cells (natural Treg cells) during infectious processes. Natural Treg cells may limit the magnitude of effector responses, which may result in failure to adequately control infection. However, natural Treg cells also help limit collateral tissue damage caused by vigorous antimicrobial immune responses. We describe here various situations in

Barry T Rouse; Yasmine Belkaid

2005-01-01

480

Modelling matter: the nature of bonding  

E-print Network

Modelling matter: the nature of bonding Science teaching unit #12;Disclaimer The Department-2008DVD-EN Modelling matter: the nature of bonding #12;#12;© Crown copyright 2008 1The National Strategies | Secondary Modelling matter: the nature of bonding 00094-2008DVD-EN Contents Modelling matter: the nature

Berzins, M.

481

An Analysis of Natural Computing Publication Venues  

E-print Network

An Analysis of Natural Computing Publication Venues Michael O'Neill Natural Computing Research an analysis of different publication venues across the field of Natural Computing and compare of invaluable resources exist within the Natural Computing commu- nity, perhaps most notable is the Genetic

Fernandez, Thomas

482

Fractal-Based Description of Natural Scenes  

Microsoft Academic Search

This paper addresses the problems of 1) representing natural shapes such as mountains, trees, and clouds, and 2) computing their description from image data. To solve these problems, we must be able to relate natural surfaces to their images; this requires a good model of natural surface shapes. Fractal functions are a good choice for modeling 3-D natural surfaces because

Alex P. Pentland

1984-01-01

483

Transformation & Uncertainty. Some Thoughts on Quantum Probability Theory, Quantum Statistics, and Natural Bundles  

NASA Astrophysics Data System (ADS)

This PHD thesis is concerned with uncertainty relations in quantum probability theory, state estimation in quantum stochastics, and natural bundles in differential geometry. After some comments on the nature and necessity of decoherence in open systems and its absence in closed ones, we prove sharp, state-independent inequalities reflecting the Heisenberg principle, the necessity of decoherence and the impossibility of perfect joint measurement. These bounds are used to judge how far a particular measurement is removed from the optimal one. We do this for a qubit interacting with the quantized EM field, continually probed using homodyne detection. We calculate to which extent this joint measurement is optimal. We then propose a two-step strategy to determine the (possibly mixed) state of n identically prepared qubits, and prove that it is asymptotically optimal in a local minimax sense, using `Quantum Local Asymptotic Normality' for qubits. We propose a physical implementation of QLAN, based on interaction with the quantized EM field. In differential geometry, a bundle is called `natural' if diffeomorphisms of the base lift to automorphisms of the bundle. We slightly extend this notion to `infinitesimal naturality', requiring only vector fields (infinitesimal diffeomorphisms) to lift. We classify these bundles. Physical fields that transform under (infinitesimal) space-time transformations must be described in terms of (infinitesimally) natural bundles. All spin structures are infinitesimally natural. Our framework thus encompasses Fermionic fields, for which the notion of a natural bundle is too restrictive. Interestingly, generalized spin structures (e.g. spin-c structures) are not always infinitesimally natural. We classify the ones that are. Depending on the gauge group at hand, this can significantly reduce the number of allowed space-time topologies.

Janssens, Bas

2010-11-01

484

Natural Resources Canada: Earth Sciences  

NSDL National Science Digital Library

The Natural Resources Canada agency has created a wonderful set of resources for curious visitors seeking to learn more about the earth sciences. The agency's formal scientific research work involves divisions such as the Canada Centre for Remote Sensing, the Geodetic Survey Division, the Geological Survey of Canada, and the National Air Photo Library. On the homepage, visitors can use the Earth Sciences Resources area to find data, maps, and tools for their own research or personal edification. The site's primary materials are divided into sections that include Climate Change, Energy and Minerals, Geography and Boundaries, Groundwater, and Natural Hazards. The Geography and Boundaries area is a real find, as it provides access to the impressive Atlas of Canada, which includes 393 interactive maps and over 1,000 referenced and archived maps on all aspects of Canadian geography. Visitors should check out the Products and Services area to learn more about the maps and image services offered here.

2011-04-03

485

Adaptation to natural facial categories.  

PubMed

Face perception is fundamentally important for judging the characteristics of individuals, such as identification of their gender, age, ethnicity or expression. We asked how the perception of these characteristics is influenced by the set of faces that observers are exposed to. Previous studies have shown that the appearance of a face can be biased strongly after viewing an altered image of the face, and have suggested that these after-effects reflect response changes in the neural mechanisms underlying object or face perception. Here we show that these adaptation effects are pronounced for natural variations in faces and for natural categorical judgements about faces. This suggests that adaptation may routinely influence face perception in normal viewing, and could have an important role in calibrating properties of face perception according to the subset of faces populating an individual's environment. PMID:15058304

Webster, Michael A; Kaping, Daniel; Mizokami, Yoko; Duhamel, Paul

2004-04-01

486

NATURAL AREA ROADLESS AREA, FLORIDA.  

USGS Publications Warehouse

Mineral surveys of the Natural Area Roadless Area, Florida, identified a substantiated resource potential for scattered low-grade phosphate deposits. The area has little promise for the occurrence of other mineral resources or oil and gas, although the possibilities for the occurrence of these two hydrocarbons cannot be ruled out. The only mineral material that has been produced in the area is clayey sand used in stabilizing roads. Peaty material is present in swamps in the roadless area, but none of it is thick or pure and no resource potential was identified. Limestone underlies all of the Natural Area Roadless Area but is under too much overburden for quarrying. Heavy minerals are present in the area but are not sufficiently concentrated to consider the area as having resource potential.

Patterson, Sam H.; Crandall, Thomas M.

1984-01-01

487

Bioactive natural products and chirality.  

PubMed

Mori's synthetic works on bioactive natural products in general and pheromones in particular started about 40 years ago to establish their absolute configurations and also to clarify their stereochemistry-bioactivity relationships. Results indicate that bioactive natural products are not always enantiomerically pure, and the stereochemistry-bioactivity relationships are not simple but complicated. For example, neither (R)- nor (S)-sulcatol, the aggregation pheromone of an ambrosia beetle, is behaviorally bioactive, whereas their mixture is active. In the case of olean, the sex pheromone of the olive fruit fly, its (R)-isomer is active against the males and the (S)-isomer is active against the females. Recent synthesis of two new insect pheromones is discussed to illustrate the modern methods in enantioselective synthesis. PMID:21633977

Mori, Kenji

2011-07-01

488

Nature News Special: 2012 Review  

NSDL National Science Digital Library

Nature magazine presents a yearly round-up of key science issues and discoveries, and this website provides non-subscribers access to this tremendous resource. On the website, visitors can look over the Nature's 10 feature, which provides information on the human stories behind the key developments from the year, including tales of Adam Steltzner, who made sure the Curiosity rover touched down safely on Mars. After learning about these amazing stories and people, visitors can look over the 366 Days feature. Here they can learn about the daily scientific events of the past year in a variety of media, including slide shows, instructional videos, and guided classroom activities. Additionally, the site includes Readers' Choice awards from the past year and a detailed exploration of what life might be like in 2062.

2012-12-20

489

Natural Environment Capabilities at MSFC  

NASA Technical Reports Server (NTRS)

The Natural Environments Branch at Marshall Space Flight Center is integral in developing, maintaining, and investigating NASA missions such as Space Launch Systems (SLS), currently under development, as well as many NASA and other agency satellite missions. We present the space environment capabilities of the Natural Environments Branch at MSFC. These in-house capabilities include model development, analysis of space and terrestrial related data, spacecraft charging anomaly investigations, surface charging modeling including Nascap-2k, space environment definition and radiation parts assessment. All aspects of space and terrestrial design are implemented with the goal of devising missions to be successful at launch and in the space environment of LEO, polar, GEO, and interplanetary orbits. In this poster, we show examples of recent applications of branch capabilities to NASA missions.

Parker, Linda Neergaard; Willis, Emily M.; Minow, Joseph I.

2014-01-01

490

In search of natural quasicrystals.  

PubMed

The concept of quasicrystals was first introduced twenty-eight years ago and, since then, over a hundred types have been discovered in the laboratory under precisely controlled physical conditions designed to avoid crystallization. Yet the original theory suggested that quasicrystals can potentially be as robust and stable as crystals, perhaps even forming naturally. These considerations motivated a decade-long search for a natural quasicrystal culminating in the discovery of icosahedrite (Al(63)Cu(24)Fe(13)), an icosahedral quasicrystal found in a rock sample composed mainly of khatyrkite (crystalline (Cu,Zn)Al(2)) labeled as coming from the Koryak Mountains of far eastern Russia. In this paper, we review the search and discovery, the analysis showing the sample to be of extraterrestrial origin and the initial results of an extraordinary geological expedition to the Koryak Mountains to seek further evidence. PMID:22878708

Steinhardt, Paul J; Bindi, Luca

2012-09-01

491

Microbial Flocculant for Nature Soda  

SciTech Connect

Microbial flocculant for nature soda has been studied. Lactobacillus TRJ21, which was able to produce an excellent biopolymer flocculant for nature soda, was obtained in our lab. The microbial flocculant was mainly produced when the bacteria laid in stationary growth phase. Fructose or glucose, as carbon sources, were more favorable for the bacterial growth and flocculant production. The bacteria was able to use ammonium sulfate or Urea as nitrogen to produce flocculant, but was not able to use peptone effectively. High C/N ratio was more favorable to Lactobacillus TRJ21 growth and flocculant production than low C/N ratio. The biopolymer flocculant was mainly composed of polysaccharide and protein with a molecular weight 1.38x106 by gel permeation chromatography. It was able to be easily purified from the culture medium by acetone. Protein in the flocculant was tested for the flocculating activity ingredient by heating the flocculant.

Qin, Peiyong; Zhang, Tong; Chen, Cuixian

2004-03-31

492

Naturally occurring methyl salicylate glycosides.  

PubMed

As an important part of non steroids anti-inflammation drug (NSAIDs), salicylate has developed from natural substance salicylic acid to natrium salicylicum, to aspirin. Now, methyl salicylate glycoside, a new derivative of salicylic acid, is modified with a -COOH group integrated one methyl radical into formic ether, and a -OH linked with a monosaccharide, a disaccharide or a trisaccharide unit by glycosidic linkage. It has the similar pharmacological activities, anti-inflammatory, analgesic, antipyretic and antithrombotic as the previous salicylates' without resulting in serious side effects, particularly the gastrointestinal toxicity. Owing to the superiority of those significant bioactivities, methyl salicylate glycosides have became a hot research area in NSAIDs for several years. This paper compiles all 9 naturally occurring methyl salicylate glycosides, their distribution of the resource and pharmacological mechanism, which could contribute to the new drug discovery. PMID:24329991

Mao, Ping; Liu, Zizhen; Xie, Meng; Jiang, Rui; Liu, Weirui; Wang, Xiaohong; Meng, Shen; She, Gaimei

2014-01-01

493

Nebraska Department of Natural Resources  

NSDL National Science Digital Library

The Nebraska Department of Natural Resources is dedicated "to the sustainable use and proper management of Nebraska's natural resources." From its website, the generally curious can learn about its integrated water management plans, animal conservation programs, and ongoing ecological studies. The homepage has an extensive series of news releases, public notices, orders, and updates, along with ten thematic sections that cover Groundwater, Integrated Water Management, and Surface Water. Policy folks and others will enjoy the Data Bank/Maps and Data area in particular. Here, they can find interactive maps of the state, soil maps, and demographic databases that track everything from ice status on the state's rivers to agrochemical contaminants. Finally, visitors can learn about Nebraska's ongoing compacts, decrees, and interstate agreements governing water use, conservation projects, and other initiatives.

494

Natural Supersymmetry in Warped Space  

E-print Network

We explore the possibility of solving the hierarchy problem by combining the paradigms of supersymmetry and compositeness. Both paradigms are under pressure from the results of the Large Hadron Collider (LHC), and combining them allows both a higher confinement scale -- due to effective supersymmetry in the low energy theory -- and heavier superpartners -- due to the composite nature of the Higgs boson -- without sacrificing naturalness. The supersymmetric Randall-Sundrum model provides a concrete example where calculations are possible, and we pursue a realistic model in this context. With a few assumptions, we are led to a model with bulk fermions, a left-right gauge symmetry in the bulk, and supersymmetry breaking on the UV brane. The first two generations of squarks are decoupled, reducing LHC signatures but also leading to quadratic divergences at two loops. The model predicts light $W'$ and $Z'$ gauge bosons, and present LHC constraints on exotic gauge bosons imply a high confinement scale and mild tuni...

Heidenreich, Ben

2014-01-01

495

Alaska Museum of Natural History  

NSDL National Science Digital Library

Ever wanted to have your own volcano laboratory, but didn't want to clean up all that lava? Be a super-scientist and create your own volcano online. The Alaska Museum of Natural History is dedicated to the study and exhibition of Alaskaâs natural history and to promoting and developing educational programs which benefit students and enrich the curricula of schools and universities. The Museum focuses on Alaska's unique geological, cultural, and ecological history. In addition to Make Your Own Volcano, the website offers extensive links, resources and educational modules including Kids Activity Sheets, Dinosaurs of Alaska, the Broken Mammoth Archeological Site, and Dinosaur Tracks, which explores the information that can be gleaned from the study of footprints.

496

Natural History of the Berkshires  

NSDL National Science Digital Library

Thousands of people both known and unknown have roamed through the Berkshires to listen to music at Tanglewood or to take a long walk up Mt. Greylock. This enchanting guide to the natural history of this ancient mountain range in western Massachusetts was created by Professor Henry Art of Williams College as part of his work with his students. The homepage provides a bit of background history on these hills and valleys, along with some nice images. Visitors can then proceed through the Locations tabs to look over such notable landmarks as Mount Greylock, Petersburg Pass, Stonehill, and the Hoosic Floodplain. Each of these tabs contains maps, directions, images, and even some videos. It's a site that might inspire a new interest in natural history or perhaps your own jaunt out to this distinct region.

Art, Henry W.

497

Forecasting Spanish natural life expectancy.  

PubMed

Knowledge of trends in life expectancy is of major importance for policy planning. It is also a key indicator for assessing future development of life insurance products, substantiality of existing retirement schemes, and long-term care for the elderly. This article examines the feasibility of decomposing age-gender-specific accidental and natural mortality rates. We study this decomposition by using the Lee and Carter model. In particular, we fit the Poisson log-bilinear version of this model proposed by Wilmoth and Brouhns et al. to historical (1975-1998) Spanish mortality rates. In addition, by using the model introduced by Wilmoth and Valkonen we analyze mortality-gender differentials for accidental and natural rates. We present aggregated life expectancy forecasts compared with those constructed using nondecomposed mortality rates. PMID:16297222

Guillen, Montserrat; Vidiella-i-Anguera, Antoni

2005-10-01

498

Natural Gas Multi-Year Program Plan  

SciTech Connect

This document comprises the Department of Energy (DOE) Natural Gas Multi-Year Program Plan, and is a follow-up to the `Natural Gas Strategic Plan and Program Crosscut Plans,` dated July 1995. DOE`s natural gas programs are aimed at simultaneously meeting our national energy needs, reducing oil imports, protecting our environment, and improving our economy. The Natural Gas Multi-Year Program Plan represents a Department-wide effort on expanded development and use of natural gas and defines Federal government and US industry roles in partnering to accomplish defined strategic goals. The four overarching goals of the Natural Gas Program are to: (1) foster development of advanced natural gas technologies, (2) encourage adoption of advanced natural gas technologies in new and existing markets, (3) support removal of policy impediments to natural gas use in new and existing markets, and (4) foster technologies and policies to maximize environmental benefits of natural gas use.

NONE

1997-12-01

499

Compressed natural gas measurement issues  

Microsoft Academic Search

The Natural Gas Vehicle Coalition`s Measurement and Metering Task Group (MMTG) was established on July 1st, 1992 to develop suggested revisions to National Institute of Standards & Technology (NIST) Handbook 44-1992 (Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices) and NIST Handbook 130-1991 (Uniform Laws & Regulations). Specifically, the suggested revisions will address the sale and measurement

C. F. Blazek; J. A. Kinast; P. M. Freeman

1993-01-01

500

Development of Natural Killer cells  

Microsoft Academic Search

Natural killer cells are found in blood, lymphoid organs, liver, lungs and uterus, where they participate in several aspects\\u000a of health and disease. During development, NK cells express a set of genes that encode for cell surface receptors, which interact\\u000a with other cell surface molecules within the individual, between individuals and across genomes. Examples of the elements\\u000a recognized by NK

Francesco Colucci