Log in

Relevant bibliographies by topics / Center density. eng

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Center density. eng'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Center density. eng.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Center density. eng"

1

Sousa, Vicelina B., José-Luís Louzada, and Helena Pereira. "Age trends and within-site effects in wood density and radial growth in Quercus faginea mature trees." Forest Systems 25, no. 1 (2016): 053. http://dx.doi.org/10.5424/fs/2016251-08411.

Full text

Abstract:

Aim of the study: This paper aims to valorize the wood of Quercus faginea Lam. for high quality end uses (e.g. furniture) by studying growth and quality properties using mature trees. Age trends in tree-ring width and wood density are shown and the main factors responsible for variations in tree-ring width and wood density within and between trees are investigated. Area of study: The study site is in the center of Portugal within the natural species distribution area.Material and methods: Radial samples from ten mature trees were collected at 6 heights (from base to 9.7 m) and prepared for X-r

APA, Harvard, Vancouver, ISO, and other styles

2

Provitera, V., C. H. Gibbons, G. Wendelschafer-Crabb, et al. "A multi-center, multinational age- and gender-adjusted normative dataset for immunofluorescent intraepidermal nerve fiber density at the distal leg." European Journal of Neurology 23, no. 2 (2015): 333–38. http://dx.doi.org/10.1111/ene.12842.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Loga-Księska, Wiktoria, Justyna Sordyl, and Artur Ryguła. "Long-term urban traffic monitoring based on wireless multi-sensor network." Open Engineering 10, no. 1 (2020): 197–208. http://dx.doi.org/10.1515/eng-2020-0018.

Full text

Abstract:

AbstractIncreasing the number of vehicles on the road network and the growing popularity of sustainable development of urban areas have resulted in the need for implementing efficient and cost-effective traffic measurement methods. From the perspective of traffic management, up-to-date information about vehicle density and access to historical data are the key components of traffic variability analyses. Rapid technological development based on Intelligent Transport Systems (ITS) has popularised the wireless sensor networks (WSN) application. The solution enables continuous monitoring of select

APA, Harvard, Vancouver, ISO, and other styles

4

Dallas, Tad A., Luca Santini, Robin Decker, and Alan Hastings. "Weighing the Evidence for the Abundant-Center Hypothesis." Biodiversity Informatics 15, no. 3 (2020): 81–91. http://dx.doi.org/10.17161/bi.v15i3.11989.

Full text

Abstract:

The abundant-center hypothesis posits that species density should be highest in the center of the geographic range or climatic niche of a species, based on the idea that the center of either will be the area with the highest demographic performance (e.g., greater fecundity, survival, or carrying capacity). While intuitive, current support for the hypothesis is quite mixed. Here, we discuss the current state of the abundant-center hypothesis, highlighting the relatively low level of support for the relationship. We then discuss the potential reasons for this lack of empirical support, emphasizi

APA, Harvard, Vancouver, ISO, and other styles

5

Diao, Qi, Yaping Dai, Qichao An, Weixing Li, Xiaoxue Feng, and Feng Pan. "Clustering by Detecting Density Peaks and Assigning Points by Similarity-First Search Based on Weighted K-Nearest Neighbors Graph." Complexity 2020 (August 12, 2020): 1–17. http://dx.doi.org/10.1155/2020/1731075.

Full text

Abstract:

This paper presents an improved clustering algorithm for categorizing data with arbitrary shapes. Most of the conventional clustering approaches work only with round-shaped clusters. This task can be accomplished by quickly searching and finding clustering methods for density peaks (DPC), but in some cases, it is limited by density peaks and allocation strategy. To overcome these limitations, two improvements are proposed in this paper. To describe the clustering center more comprehensively, the definitions of local density and relative distance are fused with multiple distances, including K-n

APA, Harvard, Vancouver, ISO, and other styles

6

Paus, Didrik, Tri Giang Phan, Tyani D. Chan, Sandra Gardam, Antony Basten, and Robert Brink. "Antigen recognition strength regulates the choice between extrafollicular plasma cell and germinal center B cell differentiation." Journal of Experimental Medicine 203, no. 4 (2006): 1081–91. http://dx.doi.org/10.1084/jem.20060087.

Full text

Abstract:

B cells responding to T-dependent antigen either differentiate rapidly into extrafollicular plasma cells or enter germinal centers and undergo somatic hypermutation and affinity maturation. However, the physiological cues that direct B cell differentiation down one pathway versus the other are unknown. Here we show that the strength of the initial interaction between B cell receptor (BCR) and antigen is a primary determinant of this decision. B cells expressing a defined BCR specificity for hen egg lysozyme (HEL) were challenged with sheep red blood cell conjugates of a series of recombinant m

APA, Harvard, Vancouver, ISO, and other styles

7

Procházka, Karel, and Zuzana Limpouchová. "Tethered Chains in Concave Volumes. A Monte Carlo Study." Collection of Czechoslovak Chemical Communications 59, no. 10 (1994): 2166–89. http://dx.doi.org/10.1135/cccc19942166.

Full text

Abstract:

Monte Carlo study of tethered chain conformations in spherical cavities was performed in a relatively broad range of average segment densities (i.e. numbers of tethered chains with increasing length in the sphere). Simulations were performed on a tetrahedral lattice using (i) an equilibrated self-avoiding walk for systems containing a single tethered chain with increasing length, and (ii) a simultaneous self-avoiding walk of many tethered chains in the spherical cavity together with equilibration of the system which was performed by a modified algorithm similar to that of Siepmann and Frenkel.

APA, Harvard, Vancouver, ISO, and other styles

8

Pershenkov, V. S., A. S. Bakerenkov, A. V. Solomatin, V. V. Belyakov, and V. V. Shurenkov. "Mechanism of the Saturation of the Radiation Induced Interface Trap Buildup." Applied Mechanics and Materials 565 (June 2014): 142–46. http://dx.doi.org/10.4028/www.scientific.net/amm.565.142.

Full text

Abstract:

Ionizing radiation impact leads to degradation of electrical parameters of microelectronic devices. It is necessary to take this fact to account when dealing with microcircuits for space applications and high energy physics. Main physical reason of radiation-induced failures of spaceship and front end electronic equipment is buidup of interface traps at Si-SiO2 interface in semiconductor transistor structures. The original mechanism of interface trap annealing based on radiation induced charge neutralization (RICN) effect is presented. It is supposed that the positive charge of trapped holes i

APA, Harvard, Vancouver, ISO, and other styles

9

Nikmaram, Farrokh Roya, and Khadijeh Kalateh. "Aromaticity of C20H10-xFx Corannulene: A Comparative Study by NICS and EFG Methods." Letters in Organic Chemistry 16, no. 7 (2019): 592–99. http://dx.doi.org/10.2174/1570178615666181024115442.

Full text

Abstract:

Corannulene (C20H10) and its fluorinated derivatives, C20H10-xFx (x=1-10), are investigated at the B3LYP/6-31G level of density functional theory. The degree of electron delocalization is evaluated using Nucleus Independent Chemical Shift (NICS) method, Electric Field Gradient (EFG) method and factor of Ellipticity (ε). In this study, the benzene is the scale of comparison as a more aromatic structure. The aromaticity has been evaluated at three points of structures; center of five-member ring (5-MR), center of fluorine-substituted ring (6-MR), and center of other six-member rings. This compar

APA, Harvard, Vancouver, ISO, and other styles

10

Schoeller, Wolfgang W. "On the structure of the P-iodo-, bromo- and chloro-bis(imino)phosphoranes: A DFT study." Zeitschrift für Naturforschung B 72, no. 11 (2017): 895–901. http://dx.doi.org/10.1515/znb-2017-0132.

Full text

Abstract:

AbstractAs demonstrated by DFT calculations, the bonding situation of P-iodo, bromo and chloro-bis(imino)phosphoranes XP(NR)2, X=Cl, Br, I, differs from that of conventional amino-bis(imino)phosphoranes (X=NR2). The monomers are highly reactive compounds with relatively small adiabatic singlet-triplet energy differences. They can dimerize by a mutual polarization mechanism between the electropositive iodine center of one monomeric unit and the more electronegative nitrogen centers of the other unit. It causes a slight depletion of p-electron density at iodine and an accumulation at the nitroge

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic "Center density. eng"

1

Melo, Fernanda Diniz de. "Uma forma quadrática no corpo de condutor primo /." São José do Rio Preto : [s.n.], 2005. http://hdl.handle.net/11449/94265.

Full text

Abstract:

Orientador: Trajano Pires da Nóbrega Neto<br>Banca: André Luíz Flores<br>Banca: José Othon Dantas Lopes<br>Resumo: O principal objetivo deste trabalho é calcular a densidade de centro da representação geométrica do ideal totalmente ramificado em corpos de condutor primo. Primeiro, fazemos a caracterização dos subcorpos do p-ésimo corpo ciclotômico e dos elementos do ideal, também calculamos a norma desse ideal. Em seguida, é apresentada uma forma quadrática e explicitado o seu mínimo para o cálculo do raio de empacotamento dessa representação geométrica. Finalizamos com o cálculo da densidade

APA, Harvard, Vancouver, ISO, and other styles

2

Quilles, Cátia Regina de Oliveira. "Discriminante de corpos de números /." São José do Rio Preto : [s.n.], 2006. http://hdl.handle.net/11449/94264.

Full text

Abstract:

Orientador: Antonio Aparecido de Andrade<br>Banca: André Luiz Flores<br>Banca: Trajano Pires da Nóbrega Neto<br>Resumo: O objetivo deste trabalho e mostrar duas maneiras de se calcular o discriminante de um corpo de números. Da primeira forma, utilizando a teoria algébrica dos números clássica vimos como calcular o discriminante dos corpos quadráticos e corpos ciclotômicos. Através desta teoria é possível calcular o discriminante somente desses corpos com um árduo trabalho. Da segunda maneira utilizando os caracteres de Dirichlet e seus condutores vimos o cálculo do discriminante para qualquer

APA, Harvard, Vancouver, ISO, and other styles

3

Rodrigues, Tatiana Miguel. "Cúbicas galoisianas /." São José do Rio Preto : [s.n.], 2003. http://hdl.handle.net/11449/94266.

Full text

Abstract:

Orientador: Trajano Pires da Nóbrega Neto<br>Banca: André Luiz Flores<br>Banca: Antonio Aparecido de Andrade<br>Resumo: O propósito deste trabalho é abordar as cúbicas galoisianas as quais, pelo Teorema de Kronecker-Weber, estão contidas em uma extensão ciclotômica Q(dn), para algum n. Estudamos a representação geométrica do seu anel dos inteiros algébricos, que são reticulados de posto 3. Visando calcular a densidade de centro de tais reticulados, é necessário o estudo do discriminante dessas cúbicas e a minimização da função traço.<br>Abstract: The purpose of this work is to deal with the ga

APA, Harvard, Vancouver, ISO, and other styles

4

Rayzaro, Oyran Silva. "Corpos abelianos com aplicações /." São José do Rio Preto : [s.n.], 2009. http://hdl.handle.net/11449/94217.

Full text

Abstract:

Orientador: Antonio Aparecido de Andrade<br>Banca: Andréia Cristina Ribeiro<br>Banca: Jéfferson Luiz Rocha Bastos<br>Resumo: Neste trabalho vemos que a imagem de um ideal do anel dos inteiros dos corpos de números, via o homomorfismo de Minkowski, é um reticulado, chamado de reticulado algébrico. Assim, o principal objetivo deste trabalho é a construção de reticulados algébricos de dimensão 2; 4; 6 e 8, com densidade de centro ótimo.<br>Abstract: In this work, we see that the image of an ideal from the algebraic integer ring of the numbers ¯elds by the Minkowski homomorphism is a lattice, name

APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Center density. eng"

1

Temperley, David. Strategies. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190653774.003.0009.

Full text

Abstract:

Strategies are recurrent structural patterns that combine the musical dimensions explored in previous chapters—key/tonality, harmony, melody, rhythm/meter, phrase structure, timbre, form—for structural or expressive effect. One set of strategies concerns the boundary between the first VCU (verse-chorus unit) and the second; here there often seems to be an effort to balance continuity and closure. Another set of strategies involves the IV chord, which is used in rather specific ways to achieve cadential effects. VCUs often reflect an overall trajectory of tension, either “middle-peaking” or “en

APA, Harvard, Vancouver, ISO, and other styles

2

Altman, Ida. The Spanish Atlantic, 1650–1780. Edited by Nicholas Canny and Philip Morgan. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199210879.013.0011.

Full text

Abstract:

During the years from the mid-seventeenth to the end of the eighteenth century, the Spanish empire exhibited increasing economic diversity and robustness and maintained its dominant position among European empires in the Americas without serious challenge, notwithstanding Spain's eclipse as a military power in Europe and maritime power on the seas. In size alone, Spain's possessions in the Americas dwarfed those of any other colonising nation and indeed, despite some losses in the Caribbean, were growing both in territorial extent and in the size and density of populations. Spanish America loo

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Center density. eng"

1

Gruszecka, Krystyna. "Ecological Centre of Warsaw as a Development Path." In Bioeconomical Solutions and Investments in Sustainable City Development. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7958-8.ch006.

Full text

Abstract:

The purpose of this chapter is to present a new development path towards greening the city center of Warsaw in the context of the increasing density of building development in recent years. After the process of urban sprawl, there has been a tendency to concentrate buildings, especially in the city center. Currently, a new idea and the need to improve the climate in the city is being born. The aim is to convert dispersed green areas into a continuous network of corridors and green spaces, comprising the city center on both sides of the Vistula River. The future structure of green areas in the central part of Warsaw will be built as an element of bioeconomy. According to this new pattern of urban greenery, larger green enclaves will be connected by corridors created out of necessity along densely built-up streets. Such elements as green walls, green roofs with decorative greenery and food crops, pocket greenery, as well as urban farms (e.g., algae energy generation) will complement buildings, foster healthy environment, and create the opportunity to enjoy pastimes.

APA, Harvard, Vancouver, ISO, and other styles

2

Peebles, P. J. E. "The Ways of Research." In Cosmology's Century. Princeton University Press, 2020. http://dx.doi.org/10.23943/princeton/9780691196022.003.0010.

Full text

Abstract:

This chapter explores some lessons to be drawn from the historical development of cosmology, which may illustrate the nature of the enterprise of natural science. It is obvious but must be stated that research in the natural sciences depends on technology that was developed largely for other purposes. Technology enabled far more efficient measurements of galaxy redshifts. However, the technology that made this possible was not aimed at astronomy; it was adapted, in part for the purpose of obtaining enough data on galaxy positions and motions for a meaningful determination of the cosmic mean mass density. It is also obvious that the ways of research in science are the ways people tend to operate in general. A working condition that may be particularly relevant for cosmology is the tendency to take a personal interest in the results: how did our universe begin, what is it like now, and how might it end? The chapter then considers the social construction of science.

APA, Harvard, Vancouver, ISO, and other styles

3

Alves de Almeida, Maria do Rosario. "The New Process of Work." In IT Outsourcing. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-770-6.ch023.

Full text

Abstract:

Toward the end of the twentieth century, more specifically in the 1990s, many organizations initiated changes in the way they used space and time. New methods of working emerged that gave some organizations the possibility of integrating the physical work environment into their business processes, increasing the occupation density of any given space while simultaneously creating more effective working spaces that promoted interactivity and communication (Comisión Europea, 2002).

APA, Harvard, Vancouver, ISO, and other styles

4

"Paddlefish Management, Propagation, and Conservation in the 21st Century." In Paddlefish Management, Propagation, and Conservation in the 21st Century, edited by Steven R. Chipps, H. Denise Symens, and Herbert Bollig. American Fisheries Society, 2009. http://dx.doi.org/10.47886/9781934874127.ch25.

Full text

Abstract:

<em>Abstract</em>.—We evaluated the influence of prey composition and abundance on survival and growth of age-0 paddlefish <em>Polyodon spathula </em>in 0.5-ha rearing ponds. Cladoceran abundance was measured in the spring of 1999 (<em>n </em>= four ponds), 2000 (<em>n </em>= six ponds) and 2005 (<em>n </em>= five ponds) at Gavin’s Point National Fish Hatchery, South Dakota. Using an information theoretic approach, we found that density of small cladocerans (e.g., <em>Bosmina</em>) at the time of larval stocking was the best supported model in explaining paddlefish survival. In contrast, estimates of <em>Daphnia </em>abundance (initial, mean, and maximum density) were poor predictors of paddlefish survival. Neither the magnitude of <em>Daphnia </em>abundance nor whether abundance was increasing or decreasing in the ponds after stocking appeared to influence paddlefish survival. Paddlefish growth, however, was positively related to mean <em>Daphnia </em>abundance in ponds. These patterns highlight the need to better understand larval feeding ecology of paddlefish and the role of electrosensory detection as it relates to prey composition and abundance.

APA, Harvard, Vancouver, ISO, and other styles

5

Cornia, Giovanni Andrea. "Rapid Population Growth and Long-term Development." In The Macroeconomics of Developing Countries. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198856672.003.0007.

Full text

Abstract:

This chapter reviews population trends over the last two hundred years and population projections to the end of this century. In 2100 the world population will have stabilized but its geographical distribution will have substantially changed compared to 2015. The chapter then discusses the five stages of the demographic transition, and different neo-Malthusian and non-Malthusian theories of the relation between population growth and economic development. It emphasizes in particular the effects of rapid population growth on land and resource availability, human capital formation, population quality, the accumulation of physical capital, employment, wages, and income inequality. The effects of rapid population growth rate over a given period were found to change in line with the population size and density at the beginning of the period considered.

APA, Harvard, Vancouver, ISO, and other styles

6

Hirschl, Ran. "Rethinking City Constitutional Status." In City, State. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190922771.003.0006.

Full text

Abstract:

This chapter explores key arguments for assigning greater constitutional status and standing to cities and their residents. It suggests that existing arguments for enhanced city power do not acknowledge or appreciate the full scope of urban centers’ constitutional powerlessness, and overlook crucial aspects of urban agglomeration, in particular in the Global South. To address these shortcomings, this chapter develops six fresh arguments for extending constitutional status to cities that have not been given due attention in the pertinent literature. These include considerations of electoral parity, economic inequality, the right to housing, climate change, density, diversity, democratic stakeholding, federalism and subsidiarity, all pointing to an acute need for a modified spatial conceptualization of the city in the constitutional state. En route, the chapter explores several constitutional designs that may remedy the systemic underrepresentation of urban voters while providing suitable voice to rural area constituencies.

APA, Harvard, Vancouver, ISO, and other styles

7

Turgut Sahin, Halil, and Yasemin Simsek. "Mineral-Bonded Wood Composites: An Alternative Building Materials." In Engineered Wood Products for Construction [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98988.

Full text

Abstract:

The manufacturing of cost-efficient construction materials is at the center of attention these days. The development of engineeringly design products has occurred mostly over the past few decades. However, the term of mineral bonded wood composite is relatively new, covers many of the products, and is used to describe a material that is produced by bonding woody material with mineral-based substrates. At present, millions of tons of bio-based composite materials are now manufactured annually from many wood species. Woods are sustainable and engineeringly have enough performance properties in composite matrix systems for many end-use areas. Thus, their utilization processes and intended uses vary accordingly. But at manufacturing, many variables affect binder hydration in composite structure and the networking/bonding between wood and binder. The mineral bonded wood products are high in density and the appropriate strength in the construction industry, an important advantage to engineering applications appears to lie in their ability to absorb and dissipate mechanical energy. Despite their higher weight-to-strength ratio, especially cement and gypsum bonded wood composites have become popular, for use in many internal and external applications to meet increasingly stringent building design regulations for insulation, and failure in service due to deterioration.

APA, Harvard, Vancouver, ISO, and other styles

8

Dube, Amitabh, Umesh Kumar, Kapil Gupta, et al. "Language as the Working Model of Human Mind." In Artificial Intelligence. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98536.

Full text

Abstract:

The Human Mind, functional aspect of Human Brain, has been envisaged to be working on the tenets of Chaos, a seeming order within a disorder, the premise of Universe. The armamentarium of Human Mind makes use of distributed neuronal networks sub-serving Sensorial Mechanisms, Mirror Neurone System (MNS) and Motor Mechanisms etching a stochastic trajectory on the virtual phase-space of Human Mind, obeying the ethos of Chaos. The informational sensorial mechanisms recruit attentional mechanisms channelising through the window of chaotic neural dynamics onto MNS that providing algorithmic image information flow along virtual phase- space coordinates concluding onto motor mechanisms that generates and mirrors a stimulus- specific and stimulus-adequate response. The singularity of self-iterating fractal architectonics of Event-Related Synchrony (ERS), a Power Spectral Density (PSD) precept of electroencephalographic (EEG) time-series denotes preferential and categorical inhibition gateway and an Event-Related Desynchrony (ERD) represents event related and locked gateway to stimulatory/excitatory neuronal architectonics leading to stimulus-locked and adequate neural response. The contextual inference in relation to stochastic phase-space trajectory of self- iterating fractal of Off-Center α ERS (Central)-On-Surround α ERD-On Surround θ ERS document efficient neural dynamics of working memory., across patterned modulation and flow of the neurally coded information.

APA, Harvard, Vancouver, ISO, and other styles

9

Case, Ted J. "Reptiles: Ecology." In Island Biogeography in the Sea of Cortés II. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780195133462.003.0015.

Full text

Abstract:

The reptiles of the islands of the Sea of Cortés have provided many opportunities to test ecological and biogeographical hypotheses because they support a diverse fauna with much insular endemism; are numerous and of varying ages and degrees of isolation; are relatively undisturbed by human activity and introduced species; and have a relatively well-understood geological history (see chap. 2). In particular, contrasts of mainland and island reptile populations in the region have resulted in significant progress in testing theories of island biogeography, principles of ecological character displacement, ecological release, density compensation, and vicariance biogeography (see chap. 8). The reptiles, being conspicuous in these arid habitats, have attracted relatively more research attention than other vertebrates, and today we have a reasonably complete picture of at least which species are on which islands. Since the first edition of this book, nearly 20 years ago, there have been only 15 new records for the major islands, of which all but one are of snakes. In this chapter I review the basic elements of reptilian island biogeography in the Sea of Cortés with an emphasis on ecological factors shaping distributions and evolutionary trajectories. I first examine the patterns of species diversity and association across islands. I then take a closer look at some particular island forms, reviewing features of their life history that seem divergent from mainland relatives. In this regard I present some new data from a long-term study of two insular species of chuckwallas. Finally, I review patterns of population density across islands and their possible determinants. A recurrent debate in island biogeography centers on the relative importance of contemporary and ongoing ecological factors relative to historical circumstances in accounting for the number and the identities of species on islands. Historical biogeographers typically view the number of species on an island as being determined by the availability of appropriate habitats. They see changes in species composition chiefly as a consequence of alteration of the mix of habitats due to climatic change (e.g., Pregill and Olson 1980; Olson and Hilgartner 1982); extinctions are posited to occur in waves, as old habitats disappear and new ones become available.

APA, Harvard, Vancouver, ISO, and other styles

10

V. Panov, Alexander, Marina A. Darenskaya, Sergey I. Dikalov, and Sergey I. Kolesnikov. "Metabolic Syndrome as the First Stage of Eldership; the Beginning of Real Aging." In Update in Geriatrics. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95464.

Full text

Abstract:

The history of active worldwide scientific research on mechanisms of aging and the age-associated diseases counts more than five decades. Of these, among the numerous theories of aging, at least 50 years dominated the free radical theory of aging. Since mitochondria were found to be the major producers of free radicals, the research on aging became largely centered on mitochondria. At the end of 80s of the 20th century, physicians have established a new nosological entity named “Metabolic syndrome” comprising several simultaneously existing symptoms and risk factors, which increase with age to 47% in men and 64% for women. The diagnosis of metabolic syndrome (MetS) requires simultaneous presence of at least three out of five medical conditions: visceral obesity, hypertension, high blood sugar, insulin resistance, low serum high-density lipoprotein accompanied with high serum triglycerides. However, from the beginning of the definition of MetS there was, and still is, a rather lovely debate, which of the symptoms must be considered as the main one. In spite of the enormous number of publications on both mechanisms of aging and MetS, there was relatively small progress in understanding the fundamental processes in these closely related problems. On the contrary, the mitochondrial free radical theory was found to be wrong in its current paradigms. In this Chapter we will discuss recent discoveries and hypotheses which open new perspectives in both theoretical and practical approaches to the problems of aging and MetS. We will show how aging and development of MetS are closely related to each other and the normal ontogenesis of human beings. Why men and women have different rates of aging and mechanisms of transition to MetS. We state that MetS is not just a cluster of symptoms, but one of the last steps of individual ontogenesis, namely the first step of eldership when the aging rate may increase manifold.

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Center density. eng"

1

Rambo, Jeffrey D., and Yogendra K. Joshi. "Multi-Scale Modeling of High Power Density Data Centers." In ASME 2003 International Electronic Packaging Technical Conference and Exhibition. ASMEDC, 2003. http://dx.doi.org/10.1115/ipack2003-35297.

Full text

Abstract:

Data center facilities, which house thousands of servers, storage devices and computing hardware, arranged in 2 meter high racks are providing many thermal challenges. Each rack can dissipate 10–15 kW, and with facilities as large as tens of thousands of square feet, the net power dissipated is typically on the order of several MW. The cost to power these facilities alone can be millions of dollars a year, with the cost to provide adequate cooling not far behind. Significant savings can be realized for the end user by improved design methodology of these high power density data centers. The fu

APA, Harvard, Vancouver, ISO, and other styles

2

Hu, Beichao, Long Phan, and Cheng-Xian Lin. "Effect of Rack Models and Buoyancy Forces on a Small Data Center Facility." In ASME 2019 Heat Transfer Summer Conference collocated with the ASME 2019 13th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ht2019-3709.

Full text

Abstract:

Abstract Due to the rapid growth of the power density in data centers, the thermal management of the data center has become more and more important. Computational Fluid Dynamics has been proven to be one of the most effective tools in the design and analysis in data centers due to its ease of use and fast prediction in data centers. Due to the large size of a data center facility, one of the most challenging tasks in the data center CFD simulation is to establish simplified models to provide a fast but accurate prediction for both the temperature and flow field in data centers. In the past few

APA, Harvard, Vancouver, ISO, and other styles

3

Angle, Brandon R., Matthew J. Rau, and Margaret L. Byron. "Effect of Mass Distribution on Falling Cylindrical Particles at Intermediate Reynolds Numbers." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5458.

Full text

Abstract:

Abstract In natural sedimentation, many particles of interest are both large and nonspherical. Some common particle types (e.g. naturally occurring aggregates) do not have a uniform mass distribution. As a result, the centers of mass and buoyancy are not co-located, leading to more complex settling dynamics. Here we investigated the orientation and terminal velocity of freely falling cylinders, in which the mass distribution was either constant (uniform-density, UD) or bipartite, undergoing a step function halfway along the length (compound-density, CD). Cylinders had relatively low aspect rat

APA, Harvard, Vancouver, ISO, and other styles

4

VanGilder, James W., and Roger R. Schmidt. "Airflow Uniformity Through Perforated Tiles in a Raised-Floor Data Center." In ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ipack2005-73375.

Full text

Abstract:

The maximum equipment power density (e.g. in power/rack or power/area) that may be deployed in a typical raised-floor data center is limited by perforated tile airflow. In the design of a data center cooling system, a simple estimate of mean airflow per perforated tile is typically made based on the number of CRAC’s and number of perforated tiles (and possibly a leakage airflow estimate). However, in practice, many perforated tiles may deliver substantially more or less than the mean, resulting in, at best, inefficiencies and, at worst, equipment failure due to inadequate cooling. Consequently

APA, Harvard, Vancouver, ISO, and other styles

5

Yang, Jiaping, Cheng Peng Tan, and Eng Hong Ong. "Heat Transfer Enhancement by Helium Gas Filled in a Hard Disk Drive Enclosure." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37622.

Full text

Abstract:

Heat transfer issue has become a challenging task in designing a high power density data center. As power consumption (Watts) of the data center continues to increase, effective thermal management of computing clusters, servers and data storage systems in data center will become more and more demanding. Hard disk drive (HDD) as a key power consumption device in high-end data storage system, its heat transfer issue has attracted more research attentions due to its complexity in nature of enclosure air flow driven by spinning disks. Among various thermal management solutions, one promising appro

APA, Harvard, Vancouver, ISO, and other styles

6

Heydari, Ali, and Vadim Gektin. "Reliability Challenges in Design and Operation of High Heat Powered Processors." In ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ipack2005-73461.

Full text

Abstract:

Advances in processor design have been made possible in part by increases in the packaging density of electronics. At the same time, combination of increased power dissipation and packaging density has led to substantial growth in the chip and system heat fluxes and amplified complexity in electrical signal integrity and mechanical stack-up design in the recent years, particularly, in the high-end computers. With the trend towards miniaturization, heat removal, along with increased reliability requirements, has become a major bottleneck in product development, especially, in low profile system

APA, Harvard, Vancouver, ISO, and other styles

7

Abdi, Frank, Cody Godines, Michael J. Presby, et al. "CMC Mode II Crack Growth Resistance Prediction of ASTM Specimen and Test Validation." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-90985.

Full text

Abstract:

Abstract The objective of this effort is to predict ceramic matrix composites (CMC) interlaminar Mode II Crack Growth Resistance (CGR), and the design of ASTM test specimen. Currently, there are a number of test standards and American Society for Testing and Materials (ASTM) for CMC’s at both ambient and elevated temperatures; however, there are no standardized test methods for determination of interlaminar shear (Mode II) fracture toughness in CMC’s. Although research work exists on interlaminar Mode II fracture toughness of CMC’s, the test methods applied showed definite drawbacks and limita

APA, Harvard, Vancouver, ISO, and other styles

8

Shi, Zhongming, Shanshan Hsieh, Bhargava Krishna Sreepathi, Jimeno A. Fonseca, François Maréchal, and Arno Schlueter. "Coarse typological studies on urban program and density defined by various urban energy conversion technologies in Singapore." In 24th ISUF 2017 - City and Territory in the Globalization Age. Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.5636.

Full text

Abstract:

Coarse typological studies on urban program and density defined by various urban energy conversion technologies in Singapore. Zhongming Shi1,2, Shanshan Hsieh1,2,3, Bhargava Krishna Sreepathi1,2, Jimeno A. Fonseca1,2, François Maréchal1,3, Arno Schlueter1,2 1 Future Cities Laboratory, Singapore-ETH Centre, 1 Create Way, CREATE Tower, 138602 Singapore 2 Architecture and Building Systems, Institute of Technology in Architecture, ETH Zurich, John-von-Neumann-Weg 9, CH-8093 Zurich, Switzerland 3 Industrial Process and Energy Systems Engineering Group, Ecole Polytechnique Federale de Lausanne, Laus

APA, Harvard, Vancouver, ISO, and other styles

9

Hong, Y. E., and M. T. T. We. "The Application of Novel Failure Analysis Techniques and Defect Modeling in Eliminating Short Poly End-Cap Problem in Submicron CMOS Devices." In ISTFA 1996. ASM International, 1996. http://dx.doi.org/10.31399/asm.cp.istfa1996p0165.

Full text

Abstract:

Abstract As transistor dimension shrinks down below submicron to cater for higher speed and higher packing density, it is very important to characterize the shrinkage carefully to avoid unwanted parametric problems. Leakage current across short poly end-cap is a new failure mechanism that falls in this category and was for the first time, uncovered in submicron multilayered CMOS devices. This mechanism was responsible for a systematic yield problem; identified as the 'centre wafer striping' functional failure problem. This paper presents the advanced failure analysis techniques and defect mode

APA, Harvard, Vancouver, ISO, and other styles

10

Taira, Kazuya, Kazuyuki Hokamoto, Shigeru Itoh, Akihisa Mori, and Rolf A. Pruemmer. "Hot Explosive Compaction of Hard Powders Using Cylindrical Configuration." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93483.

Full text

Abstract:

We tried hot explosive compaction to make bulk materials of hard-to-consolidate powders using cylindrical configuration. By heating above 1000°C, it is possible to give the ability of plastic deformation for hard ceramic powders and also possible to enhance the surface melting to bond each particle. Using the cylindrical configuration, hot explosive compaction experiment was carried out for consolidation of TiB2 powders at elevated temperature. A central hole and a melting spot at the end of the tube were observed for a sample recovered. High compaction density and high hardness (above 3000 VH

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!