bluuebunny/crossref_metadata_2025 huggingface dataset:
On the accuracy and efficiency of the joint source scanning algorithm for hydraulic fracturing monitoring
Authors: Yu Yangyang , Liang Chuntao , Wu Furong , Wang Xuben , Yu Gang , Chu Fangdong
Published: May 2018

We have developed the joint source scanning algorithm (JSSA) to determine the locations and focal mechanisms (FMs) of microseismic events simultaneously. However, the computational expense of using JSSA is too high to meet the requirements of real-time monitoring in industrial production. We have developed several scanning schemas to reduce computation time. A multistage scanning schema can significantly improve efficiency while retaining accuracy. For the optimized joint inversion method, a series of tests has been carried out using actual field data and synthetic data to evaluate the accuracy of the method, as well as its dependence on the noise level, source depths, FMs, and other factors. The surface-based arrays better constrain horizontal location errors ([Formula: see text]) and angular errors of P-axes (within 10° for [Formula: see text]). For sources with varying rakes, dips, strikes, and depths, the errors are mostly controlled by the partition of positive and negative polarities in different quadrants. More evenly partitioned polarities in different quadrants yield better results for locations and FMs. Nevertheless, even when some FMs have bad resolutions, the optimized JSSA method can still significantly improve location accuracies.
Up/down separation of seismic depth images
Authors: Duveneck Eric
Published: May 2018

Reverse time migration (RTM) is normally based on wavefield modeling that allows wave propagation in all spatial directions. While this is one of the strengths of RTM, it can also lead to undesired effects, including partial image amplitude cancellation for reflectors that are illuminated and imaged from two sides, as well as the appearance of ghost-reflection artifacts if the modeled source- and receiver-side wavefields are both scattered back from a hard model contrast. Both issues can be addressed by separating the seismic depth image into components imaged from above and components imaged from below. I derive and compare two methods that directly achieve such an image up/down separation, without relying on an up/down separation of the individual simulated wavefields used for imaging. The first method is based on the formation of time-shift gathers during imaging and filtering out events with either positive or negative slopes in these gathers, corresponding to imaging from below or above, respectively. The second method is a new image up/down separation approach inspired by previously published wavefield up/down separation approaches. It involves combining a migrated image with an additional version of the image, obtained by applying a temporal Hilbert transform to the input data and a subsequent Hilbert transform in depth on the migrated image. Compared with approaches based on up/down separation of the individual wavefields, the presented direct image up/down separation methods have distinctive advantages. While the approach based on filtering of time-shift gathers is efficient and offers considerable flexibility, the approach based on Hilbert transforms is attractive because of its simplicity since no changes to the migration algorithm itself are required. I demonstrate both image up/down separation methods on synthetic and real data and show that both methods lead to very similar results.
Allosteric Regulation of the Follicle-Stimulating Hormone Receptor
Authors: Nataraja Selvaraj , Sriraman Venkataraman , Palmer Stephen
Published: May 2018

Follicle-stimulating hormone receptor (FSHR) belongs to the leucine-rich repeat family of the G protein–coupled receptor (LGR), which includes the glycoprotein hormone receptors luteinizing hormone receptor, thyrotropin receptor, and other LGRs 4, 5, 6, and 7. FSH is the key regulator of folliculogenesis in females and spermatogenesis in males. FSH elicits its physiological response through its cognate receptor on the cell surface. Binding of the hormone FSH to its receptor FSHR brings about conformational changes in the receptor that are transduced through the transmembrane domain to the intracellular region, where the downstream effector interaction takes place, leading to activation of the downstream signaling cascade. Identification of small molecules that could activate or antagonize FSHR provided interesting tools to study the signal transduction mechanism of the receptor. However, because of the nature of the ligand-receptor interaction of FSH-FSHR, which contains multiple sites in the extracellular binding domain, most of the small-molecule modulators of FSHR are unable to bind to the orthosteric site of the receptors. Rather they modulate receptor activation through allosteric sites in the transmembrane region. This review will discuss allosteric modulation of FSHR primarily through the discovery of small-molecule modulators, focusing on current data on the status of development and the utility of these as tools to better understand signaling mechanisms.
“That Abominable Solitary Vice We Call Theory”
Authors: Trujillo Kris
Published: May 2018

Organized around the complete works of John of the Cross, Juan Goytisolo’s Las virtudes del pájaro solitario (1988) presents a radical characterization of mysticism aligned with the spontaneity and immediacy of poetic genius. Through an elaboration of the opposition between critique and creation or theory and practice, Goytisolo aligns his version of mysticism with heresy and negative theology. But how might a return to John of the Cross’s writings wrest this “mystic” and “poet” from the confines of exceptionalism to rethink his exemplarity as grounded and cultivated in community? This article argues that reading John of the Cross’s Cántico espiritual in the context of the Carmelite reform not only destabilizes Goytisolo’s notion of radical mysticism but also makes imaginable a loving critique that offers the politics of queerness and religious difference an alternative to oppositionality per se.
Mystical Reflections on the Primordial Torah
Authors: Ish-Shalom Zvi
Published: May 2018

This essay examines select teachings from Kedumah, a contemporary mystical path in the lineage of the Primordial Torah. Kedumah, a Hebrew word that means “ancient” or “primordial,” points to the nonconceptual ground that eternally abides at the heart of all our experiences, prior to all the labeling and processing of our conceptual mind. The contemporary mystical path of Kedumah is interested in accessing and including this primordial nature as an integral part of our everyday experience. Kedumah thus calls for a more integrative appreciation of all reality—including the ordinary and mundane as equally sacred expressions of the whole. In this sense, Kedumah posits a mysticism that entails the normalization of the spiritual and the equalization of the sacred and profane. In this essay ancient Kabbalistic principles and biblical texts are examined to demonstrate this radical vision.
Jewish Mystical Influences on a Medieval Ottoman Hagiography
Authors: Durak Ahmet Cem
Published: May 2018

It has long been known that Muslim scholars used rabbinic literature in what is called Isra’iliyyat in the Islamic tradition. They used these sources as legitimate details of the Qur’anic stories. Less well known is how later Islamic scholars incorporated these sources into their own retellings of the stories that all three texts—the Qur’an, the Hebrew Bible, and the New Testament—share. This article examines the hagiography by Abdülvasi Çelebi (d. 1415), Halilname, which tells the story of Abraham and draws on rabbinic literature. Several factors led to the use of Jewish sources in Halilname. First, the Ottoman state did not have a canonized orthodox Islamic system until Süleyman I (r. 1520–66), and this lack of canonization gave Islamic mystics greater liberty to say what they wanted. Second, a zeitgeist of religious syncretism drew inspiration from the mysticism that dominated Anatolia. Finally, the most important patriarch for Jews, Christians, and Muslims—Abraham—proved the ideal subject in an empire that included members of all three monotheistic religions.
PEDF regulates plasticity of a novel lipid–MTOC axis in prostate cancer-associated fibroblasts
Authors: Nardi Francesca , Fitchev Philip , Franco Omar E. , Ivanisevic Jelena , Scheibler Adrian , Hayward Simon W. , Brendler Charles B. , Welte Michael A. , Crawford Susan E.
Published: May 2018

Prostate tumors make metabolic adaptations to ensure adequate energy and amplify cell cycle regulators, such as centrosomes, to sustain their proliferative capacity. It is not known whether cancer-associated fibroblasts (CAFs) undergo metabolic re-programming. We postulated that CAFs augment lipid storage and amplify centrosomal or non-centrosomal microtubule-organizing centers (MTOCs) through a pigment epithelium-derived factor (PEDF)-dependent lipid–MTOC signaling axis. Primary human normal prostate fibroblasts (NFs) and CAFs were evaluated for lipid content, triacylglycerol-regulating proteins, MTOC number and distribution. CAFs were found to store more neutral lipids than NFs. Adipose triglyceride lipase (ATGL) and PEDF were strongly expressed in NFs, whereas CAFs had minimal to undetectable levels of PEDF or ATGL protein. At baseline, CAFs demonstrated MTOC amplification when compared to 1–2 perinuclear MTOCs consistently observed in NFs. Treatment with PEDF or blockade of lipogenesis suppressed lipid content and MTOC number. In summary, our data support that CAFs have acquired a tumor-like phenotype by re-programming lipid metabolism and amplifying MTOCs. Normalization of MTOCs by restoring PEDF or by blocking lipogenesis highlights a previously unrecognized plasticity in centrosomes, which is regulated through a new lipid–MTOC axis.

This article has an associated First Person interview with the first author of the paper.
МОДЕЛИРОВАНИЕ ТЕХНИЧЕСКИХ КАНАЛОВ УТЕЧКИ ИНФОРМАЦИИ НА РАСПРЕДЕЛЕННЫХ ОБЪЕКТАХ УПРАВЛЕНИЯ
Authors: Karpov Aleksander Vladimirovich , Lepeshkin Oleg Mikhailovich
Published: May 2018

Значительное повышение требований к безопасности функционирования распределенных объектов управления не может быть реализовано только за счет расширения и ужесточения мер контроля за безопасностью. Первым шагом в обеспечении безопасности информации на таких объектах является анализ условий их функционирования и моделирование технических каналов утечки информации. Разработка моделей таких каналов по существу является единственным методом достаточно полного исследования их возможностей, и направлена на получение количественных оценок безопасности функционирования сложных объектов. Данные оценки необходимы для принятия решения о степени защищенности информации от утечки согласно действующему критерию. Существующие модели разработаны для типовых сосредоточенных объектов и позволяют оценить степень защищенности информации от утечки по каждому из каналов в отдельности, что влечет за собой значительное увеличение требуемого защитного ресурса и времени оценки защищенности информации на объекте в целом. В статье рассматривается логико-вероятностный метод оценки безопасности структурно-сложных объектов, на примере представлена модель канала утечки информации на распределенном объекте управления, рекомендовано использовать программный комплекс автоматизированного структурно-логического моделирования сложных систем, позволяющий оценить риск утечки информации в динамике. Рассчитывается вероятность утечки информации по техническим каналам, вычисляются такие дифференциальные характеристики безопасного функционирования распределенных объектов управления как положительные и отрицательные вклады инициирующих событий и условий, приводящих к утечке.Цель – количественная оценка риска утечки информации, необходимая для обоснования рационального состава организационно-технических мер защиты, а также варианта структуры системы защиты информации от утечки по техническим каналам.Метод или методология проведения работы: в статье использовался логико-вероятностный метод структурно-логического моделирования.Результаты: получены наиболее информативные параметры, позволяющие количественно оценить риск утечки информации.Область применения результатов: полученные результаты целесообразно применять для оценки безопасности функционирования структурно-сложных объектов, в том числе распределенных объектов управления, а также для рационального распределения сил и средств защиты информации от ее утечки по техническим каналам.
The Misuse of Accounting-Based Approximations of Tobin’s q in a World of Market-Based Assets
Authors: Bendle Neil Thomas , Butt Moeen Naseer
Published: May 2018

Accounting-based approximations of Tobin’s q (AATQ) are increasingly popular in marketing. AATQ differ from Tobin’s original conception in that they use accounting data to assess the replacement cost of a firm’s assets; the core problem with this is that valuable assets go unrecorded in external reports, including systematic underrecording of market-based assets. This research examines the extensive erroneous claims made about AATQ in marketing studies. We note the widespread use of the metrics and demonstrate that the AATQ used in marketing (1) are not comparable across industries, (2) do not use only tangible assets in their denominator, and (3) should not find equilibrium at 1. AATQ are often described as performance metrics and can respond appropriately to certain types of positive performance. Unfortunately, they also respond positively to performance-neutral strategic choices. Furthermore, whenever AATQ exceed 1, as is typical, they increase even with completely wasted investments. We note that AATQ are especially problematic measures of performance for marketers because they are biased toward reporting that investments in market-based assets (e.g., brand equity and customer satisfaction) are effective. The misuse of AATQ we document suggests the need for marketing scholars to pay greater attention to the theoretical underpinnings of their metrics.
The Cost of Financing Education: Can Student Debt Hinder Entrepreneurship?
Authors: Krishnan Karthik , Wang Pinshuo
Published: May 2018

We find that student debt is negatively related to the propensity to start a firm, particularly larger and more successful ventures. An exogenous change due to the Higher Education Amendments of 1998, which made student debt completely nondischargeable through personal bankruptcy, reduced the likelihood of entrepreneurship by student loan borrowers that were already in four-year college at the time of this regulation. Moreover, an exogenous shock to the level of student debt due to the Higher Education Amendments of 1992 negatively impacts entrepreneurship rates for students already in four-year college at the time of this regulation. Entrepreneurs with more student debt are more likely to fall behind on their student debt payments, and this relation is mitigated when their ventures are successful. Our evidence indicates that student debt inhibits entrepreneurship by exacerbating the effect of negative business outcomes on the individual.

This paper was accepted by Gustavo Manso, finance.
When to Abandon a Research Project and Search for a New One
Authors: McCardle Kevin F. , Tsetlin Ilia , Winkler Robert L.
Published: May 2018

We investigate the cost of the opportunity delayed by working on one project with uncertain success rather than searching for a new project. We answer this question: How long should a firm work on a research project with uncertain success before abandoning it if the only alternative is to search for a new project to work on? Rather than treating the opportunity as an exogenous alternative, this approach endogenizes the opportunity value and the attendant cost of its delay. We consider cases with both a finite and an infinite number of potential projects. We derive the optimal stopping time and show that it increases with the discount rate, with the rate of arrival of project failure, and with the prior probability that the project can be successfully completed. The optimal stopping time decreases with the rates of new project arrival and project completion.
CONTRIBUIÇÕES DO PROGRAMA DE DESENVOLVIMENTO EDUCACIONAL (PDE/UNICENTO-PR) NA FORMAÇÃO DE PROFESSORES DE CIÊNCIAS E BIOLOGIA
Authors: Crisostimo Ana Lúcia , Dos Santos Sandro Aparecido , Silva Vantielen Da Silva , Ferrari Sonia Cristina
Published: May 2018

Este artigo tem como objeto de análise o Programa de Desenvolvimento Educacional (PDE/PR), constituído a partir da parceria entre a Secretaria de Estado da Educação – SEED/PR, a Secretária de Estado de Ciência, Tecnologia e Ensino Superior – SETI/PR e as Instituições Públicas de Ensino Superior do Paraná – IPES. O referido programa de formação continuada objetiva a profissionalização de educadores da educação básica no estado do Paraná. Particularmente o presente artigo analisa as contribuições e desafios do PDE/PR para a melhoria da prática pedagógica dos professores da educação básica participantes da 1ª e 2ª edições, ofertadas em 2007 e 2008, no âmbito da Universidade Estadual do Centro-Oeste-PR, particularmente das áreas de Ciências e Biologia. A pesquisa é de cunho qualitativo e os dados foram coletados por meio de um questionário semiestruturado encaminhado a 37 professores PDE/UNICENTRO de Ciências e Biologia. O texto aponta a formação continuada como elemento crucial para o desenvolvimento profissional de professores e reforça a importância do professor como agente de mudanças que levem à melhoria da qualidade do ensino público no Paraná.
SENTIDOS DA LEITURA E ESCRITA DE DOIS SUJEITOS DA EDUCAÇÃO DE ADULTOS NOS CONTEXTOS BRASILEIRO E MOÇAMBICANO
Authors: Souza Santos Josilene De , Juliasse Arlindo Cornélio Ntunduatha
Published: May 2018

RESUMO O trabalho retrata as histórias de vida de João e Vicente, sujeitos entrevistados nas pesquisas de mestrado e doutorado, pondo em destaque os sentidos da escrita e da leitura na vida cotidiana e escolar. João, oriundo de uma família humilde da Paraíba, só no ano de 2011, pela primeira vez, começou a estudar. Vicente, oriundo de Mogovolas, Província de Nampula, região norte de Moçambique, falante de suas línguas maternas, mas alfabetizado na utilizada como instrumento unificador, a Língua Portuguesa. Lemos as narrativas separadamente e as correlacionamos em busca de possíveis elementos de diálogo sobre práticas de leitura escrita na vida cotidiana e no espaço escolar. Por fim, consideramos relevante o trabalho por assentar-se em duas histórias de vida que representam os sujeitos atravessados pelo escrito se apropriam de práticas de leitura e escrita.
CIÊNCIA, TECNOLOGIA E SOCIEDADE: ABORDAGEM CRÍTICA NO ENSINO DE CIÊNCIAS
Authors: Leão Marcelo Franco , Garcês Bruno Pereira
Published: May 2018

O objetivo do estudo foi proporcionar reflexões sobre as relações entre Ciência, Tecnologia e Sociedade, bem como sobre a importância da abordagem CTS para o ensino de ciências. Trata-se de relato de experiência, ocorrida em fevereiro de 2016, durante as aulas da disciplina CTS no Curso de Especialização em Ensino de Ciências do IFMT Campus Confresa-MT. O estudo envolveu 49 pós-graduandos da Região Araguaia-Xingu. Inicialmente foi realizada a dinâmica árvore dos sonhos no intuito de apontar fragilidades e perspectivas sobre o ensino de ciências. Após, foi realizada uma tempestade de ideias sobre os termos CTS, que oportunizou conhecer suas concepções prévias. Foi proposta a leitura de artigos científicos sobre o assunto, os quais deveriam ser sintetizados em mapas conceituais. A socialização se deu por meio da galeria de ideias. Estratégias como Grupo de Verbalização e Grupo de Observação e a análise de documentários em vídeos foram utilizados para aprofundar os estudos. Logo, compreender as relações CTS e desenvolver essa abordagem ao ensinar ciências poderá contribuir para o desenvolvimento da sociedade com cidadãos críticos, autônomos e conscientes.
AS CONTRIBUIÇÕES DE PAULO FREIRE PARA A EDUCAÇÃO SOCIAL
Authors: Mota Patricia Flavia
Published: May 2018

Este artigo tem como objetivo discutir sobre as contribuições de Paulo Freire no campo da Educação Social. Essa reflexão surgiu dos estudos promovidos pelo Grupo de Estudos (GEPE) Fora da Sala de Aula, do Departamento de Educação da Faculdade de Formação de Professores da UERJ, no município de São Gonçalo, que busca organizar, teoricamente, as pesquisas, relatos de experiências e discussões acerca da Pedagogia Social, campo de reflexões teóricas sobre as práticas existentes na Educação Social. Nesse artigo trazemos um breve resumo sobre os estudos acerca dos campos citados, a saber: Pedagogia Social e Educação Social; as contribuições de Freire nestes estudos; e, ainda, um relato do Encontro do Dia do Educador Social que aconteceu na UERJ/FFP, organizado pelo grupo gestor do projeto.
From staff nurse to nurse consultant: Continuing professional development part 2: What opportunities do you have?
Authors: Fowler John
Published: May 2018

John Fowler, Educational Consultant, explores continued professional development for the clinically based nurse, looking at making the most of opportunities
Prevention of dehydration in hospital patients
Authors: Shells Rebecca , Morrell-Scott Nicola
Published: May 2018

Dehydration is widely linked to increased risk of mortality in patients who are acutely unwell, and it also increases the risk of further illness. Despite being recognised nationwide as a cause for concern, 45% of hospital patients will become dehydrated upon admission, suggesting that more needs to be done to prevent dehydration. The use of bedside water devices allows patients to drink freely without assistance. Access to these can reduce a patient's length of stay in hospital and minimise the risk of developing a urinary tract infection. However, further research is needed to fully assess the impact of having such devices at the bedside.
Independent acute hospitals must act to improve patient safety
Authors: Tingle John
Published: May 2018

John Tingle, Associate Professor (Teaching and Scholarship), Nottingham Trent University, discusses a Care Quality Commission (CQC) report on independent acute hospitals
Assessing anxiety and depression in cancer patients
Authors: Milligan Fiona , Martinez Fe , Aal SohSoha Hassan Mohd Abdel , Ahmed Samah Abdelrehim , Joby Beverly , Matalam Jean Sultan , Nair Sujala Sukumaran , De Leon Maxion Anthony , Sayed Safia , Melepeedikayil Soji Samson
Published: May 2018

Background:

empirical evidence suggests that anxiety and depression in cancer patients is underdiagnosed and subsequently this patient population receives little or no support or intervention to address their psychosocial needs. It is often difficult to distinguish between normal emotional distress experienced following a cancer diagnosis and anxiety and depression, which can have a significant impact on coping mechanisms and subsequent outcomes.

Aim:

a qualitative study using the Hospital Anxiety and Depression Scale (HADS) was undertaken in the National Centre for Cancer Care and Research in Qatar. The driver for change was to provide evidence of the need for an assessment to be incorporated into the nursing admission process as a means of early detection and onward referral for more formal interventions if required. The sample size was 57.

Findings:

the evidence from the outcome data supported the hypothesis that anxiety and depression were present in a significant number of the sample group. This would support the proposal of early screening and onward referral. A number of patients surveyed expressed moderate to severe depression, which may impact negatively on outcomes.

Conclusion:

screening for anxiety and depression in adult cancer patients should form part of an early nursing assessment to identify those who may benefit from more structured interventions. HADS is a useful screening tool; however, further research is required on validating tools used to screen for anxiety and depression in cancer and chronic disease in different cultures to ensure validity and reliability of outcome data.
A closer look at strangles
Authors: Watson Rebecca
Published: May 2018

Rebecca Watson MSc RVN discusses the incidence and control of the disease
The equine cheek teeth
Authors: Biggi Marianna
Published: May 2018

Marianna Biggi, equine diagnostic imaging specialist, from Vet-CT teleradiology services, advises on the acquisition and interpretation of head radiographs
Explaining inattentive ADHD
Authors: Sobel Daniel
Published: May 2018

The hyperactive version of ADHD is well-known and often spotted, but students with inattentive ADHD frequently go undiagnosed, as Daniel Sobel knows from his own experience
Removing barriers to learning
Authors: Crawley James
Published: May 2018

The creation of the Student Progress team at Arena Academy signalled a real focus on underachievement and barriers to learning – from years 7 to 11. James Crawley explains
Teacher-led in-school CPD
Authors: Webb Helen
Published: May 2018

Teachers working together in-school to improve their classroom practice is an effective and inexpensive form of CPD. With a focus on the curriculum reforms, Helen Webb discusses her school's approach
Synthesis and Characterization of Co (III) Complex of the New Chiral Schiff Base
Authors: Ghammamy Shahriar , Sedaghat Sajjad
Published: May 2018

We describe the synthesis and characterization of a new Co(III) complex of the Schiff base ligand (N1 E, N2E) - N1-((1H- pyrrol-2-yl) methylene) - N2-(1- phenylethylidene) ethane- 1,2- diamineabbreviated as MPEAwas synthesized and characterized.Co (III) Metal complex of this Schiff base ligand prepared by reaction of CoCl2.6H2O with MPEA. Characterization of the ligand was made by microanalyses, FT-IR, 1HNMR and 13CNMR and its complex was made by FT-IR.
Dielectric Relaxation Studies of Ethyl Formate with Primary Alcohols using Time Domain Reflectometry
Authors: Elangovan S. , Mullainathan S.
Published: May 2018

Dielectric relaxation studies of ethylformate with 1-propanol,1-butanol and 1-pentanol binary mixtures have been carried out at micro frequency range 9.36 GHZ at temperature of 303K.Different dielectric parameters like dielectric constant(ε’ ),dielectric loss (ε’’) ,Static dielectric constant (ε0) and dielectric constant at optical frequency (ε∞) have been determined. The Relaxation time (ε) has been obtained by Higasi and Cole-Cole method. The dielectric constant (τ0) and relaxation time (τ) decreased with increasing the concentration of ethylformate in alcohol system. The relaxation time (τ) increased with increase in chain length of the alcohols. The result shows that the strength of this molecular interaction depends upon the carbon chain length of the alcohols. Hence the proton donating ability of alcohols is in the order of 1-propanol<1-butanol<1-pentanol
Design and Analysis of a Heat Exchanger Network
Authors: Azim Aijaz Mohammad , Ravikumar T. S.
Published: May 2018

the hot fluid outlet temperature, cold fluid outlet temperature, heat transfer rate and effectiveness at varying hot and cold fluid inlet temperatures using, log mean temperature difference (LMTD) and effectiveness-number of transfer units (ε-NTU) method. The obtained result illustrates how heat transfer rate and effectiveness increases or decreases at varying hot and cold fluid inlet temperatures. The result obtained from both LMTD and å-NTU method gives statistically significant values. The objective of this paper is to find out the optimal temperature at which heat transfer rate and effectiveness are maximum.
On Characterization of Non-commutative Minkowski Space Time
Authors: Kumar Dharmendra , KumarYadav Sunil
Published: May 2018

The present study aims to derive modified geodesic equation in non-commutative space time. Snyder developed a model for non-commutative space time which provides a suitable technique of quantum structure of the space. We extend Tetrad formulation of general relativity to non-commutative case for complex gravity models. We derive geodesic equation on the k-space time in Non-commutative space, which is a generalization of Feynman’s approach. It has been shown that the homogeneous Maxwell’s equations may be derived by starting with the Newton’s force equation and generalized to relativistic. We show that the geodesic equation in the commutative space time is a suitable for generalization to κ -space time in κ -deformed space time. It shown that the κ-dependent correction to geodesic equation is cubic in velocities.
A Ground State Study of Structural and Magnetic Properties of Co2CrGe: A GGA Method
Authors: Rai D. P. , Shankar Amit , Sandeep Sandeep. , Ghimire M. P. , Thapa R. K.
Published: May 2018

The structural and magnetic properties of Co2CrGe, a Heusler alloy have been evaluated by first principles density functional theory through total energy calculations at 0 K by the full potential linearized augmented plane wave (FP-LAPW) method as implemented in WIEN2K code. The calculated results were compared with the previously reported results. Generalized gradient approximation (GGA) was used to study the structural and magnetic properties of Co2CrGe.
FT-IR Spectroscopic and XRD Studies on Tetra-thiourea Strontium Chloride Single Crystals
Authors: Jethva H. O. , Hajiyani2 R. R.
Published: May 2018

There are various nonlinear optical materials having crystalline nature and find various applications in science and technology. Tetra-thiourea strontium chloride was synthesized and single crystals were grown by the slow solvent evaporation technique using aqueous solvent. The grown crystals were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), and Xray diffraction analysis (XRD). The FT-IR spectra of these crystals were recorded in the wave number range 400-4000cm-1 which reveals the presence of various functional groups. The powder XRD analysis suggested orthorhombic crystal structure.
Pore Geometry as a Limiting Factor for Anion Diffusion in Argillaceous Rocks
Authors: Wigger C. , Plöze M. , Van Loon L. R.
Published: May 2018

Several barrier types are envisaged to minimize the release of radionuclides from waste matrices into groundwater. In a number of countries argillaceous rocks make up the natural barrier that will isolate radioactive substances from the aquifer. The present study addresses the influence of pore geometry as a limiting factor for anion diffusion in argillaceous rocks. Irrespective of the pore core size, anion diffusion can be limited by the pore-size opening, i.e. if the pore opening is so narrow that the electric double layers overlap and form a barrier to anions irrespective of the pore size. This so-called ‘bottleneck effect’ limits the anion diffusion. The present study extends previous investigations that focused on other factors which limit anion diffusion, e.g. mineralogy or interlayer equivalent pores. The existence of bottleneck pores was confirmed by effective tortuosity calculations and retention-potential measurements using mercury intrusion porosimetry. On the basis of two different core samples from argillaceous rocks from Switzerland, Opalinus Clay and Helvetic Marl, this work shows evidence of the existence of bottleneck pores. The larger permanent anion exclusion in the Helvetic Marl sample compared to the Opalinus Clay sample can be explained by the larger retention potential and larger effective tortuosity of the Helvetic Marl rock, which indicates more pores with bottleneck effects than is the case for the Opalinus Clay rock.
Patterns of Variation in the Seed Morphology of Iva annua var. macrocarpa, an Extinct North American Domesticate
Authors: Weiland Andrew W. , Gremillion Kristen J.
Published: May 2018

Using measurements from archaeological achenes of the extinct North American cultigen marshelder (Iva annua var. macrocarpa [S.F. Blake] R.C. Jackson), we quantitatively explore patterns of variation of fruit length and width across mid-continental North America. Linear regression shows that while achene length and width increase significantly over time (length: p-value<0.0001, b=-126.04, r2=0.1037, width: p-value<0.0001, b=-230.85, r2=0.0964), overall, regions tend to show more variation. A high incidence of phenotypic variation among domesticated marshelder as measured by coefficient of variation may be a result of introgression with wild stands. An ANOVA Tukey post-hoc analysis of archaeological site samples resulted in homogeneous subsets which correspond to region with some overlap, interpreted as a cline. These results and the low numbers of wild-sized achenes in archaeological marshelder samples of eastern Kentucky support human introduction of domesticated marshelder into this region. Marshelder in the archaeological record reflects the long-standing mixed economies of hunting-gathering and agriculture used by indigenous communities of eastern North America.
EXPERIMENTAL STUDY ON THE SEISMIC BEHAVIOR OF A SHEAR WALL WITH CONCRETE-FILLED STEEL TUBULAR FRAMES AND SLITS
Authors: Han Qing , Gao Zeyu , Wang Yaohong , Wang Xin , Bai Zimo
Published: May 2018

This paper proposes a new type of composite shear wall with concrete-filled steel tubular frames and artificial vertical slits. The seismic behaviour of this new shear wall is studied by using a cyclic loading test. The failure mode, load-carrying capacity, ductility, stiffness degradation, hysteresis behaviour and energy dissipating capacity shown in the course of the test are studied. And this paper proposes the calculation formula of normal section bearing capacity. The main research results are as follows. Firstly, the failure mode of this new shear wall is the flexural failure. Secondly, compared with the ordinary reinforced concrete shear wall with slits, the new shear walls with concrete-filled steel tubular frames and slits show a better performance in load-carrying capacity, ductility, stiffness degradation and energy dissipating capacity.
SEARCHING UNGROUND FAN INDUCED RECIRCULATION IN A COMPLICATED MINE VENTILATION NETWORK
Authors: Wang Lidong
Published: May 2018

Due to the difficulty of finding recirculation of airflows in a complicated ventilation system, a searching strategy is proposed based on depth-first search method for searching recirculation in complicated ventilation networks. The depth first method is introduced briefly while the searching strategy for tracing recirculation in a network is introduced in detail. The proposed method is then used in a copper mine for searching the recirculation of airflows. The mine ventilation system is solved by VENTSIM software first for getting all the airflows information, i.e. the nodes and directions. Then the data of ventilation system is stored in the matrix for tracing the recirculation in the network. A few of recirculation of airflows are found and are compared with the VENTSIM solving results. It is found that the searched results agree with the VENTSIM solving results of the ventilation system. It is concluded that the proposed method has the capabilities of tracing airflow for finding recirculation.
MODELLING AND ANALYSIS OF AN IRREGULAR RAILWAY TRACK SYSTEM FOR COMPUTATION OF CRITICAL VELOCITY FOR LIMITING VERTICAL ACCELERATION
Authors: Gupta Akshay , Deka Puja , Debnath Nirmalendu
Published: May 2018

The irregularity in the railway tracks is a very common topic of interest among the researchers in recent times. The trains run on the tracks with very high velocities to meet the demands of the passengers. But due to the unevenness of the track, the body of the train car faces vertical accelerations, which in turn causes discomfort to the passengers sitting inside the train car. In the present report, vertical acceleration is analyzed for uneven tracks by taking the car body as a single degree of freedom model. The investigation shows a clear explanation of the critical velocity values for the train, so as to maintain the passenger comfort conditions. Random sinusoidal curves were generated using MATLAB to analyze the random unevenness of the track. It is observed that the vertical accelerations in the car body are directly proportional to the speed of the train. Finally, a critical velocity is proposed for a train running on uneven sinusoidal profile track such that, the vertical acceleration not exceeding 0.2g.
Le logement, variable centrale de l’exercice de prospective démographique à l’échelle locale
Authors: Léger Jean-François
Published: May 2018

Résumé

Cet article présente la façon dont la variable logement peut être mobilisée dans les projections démographiques et comment cela pourrait permettre aux démographes d’être plus impliqués dans le champ de la prospective territoriale à l’échelle locale. Dans le cadre de l’élaboration des plans locaux d’urbanisme et/ou de l’habitat, les démographes sont souvent sollicités pour fixer les évolutions démographiques auxquelles le territoire pourrait être confronté. Le logement est dans ce cas considéré comme une réponse aux perspectives démographiques. Mais au niveau local, le sens de la relation s’inverse : au sein d’un bassin démographique de quelques centaines de kilomètres carrés, la mobilité résidentielle intercommunale est le plus souvent déterminée par les opportunités immobilières. Les petits territoires peuvent donc être, via la politique de logements, des acteurs de leur dynamique démographique. Cette situation conduit à faire du logement, à l’échelle locale, une variable centrale de l’exercice de projection démographique. Elle implique aussi de renouveler les méthodes et de mobiliser, dans la définition des scénarios, les acteurs locaux de l’aménagement du territoire. Le démographe n’est donc plus seulement un prestataire de service, il devient un partenaire de la réflexion prospective sur le territoire, qui est d’ailleurs de plus en plus fréquemment entendue comme un processus itératif qui s’appuie sur les échanges entre les acteurs locaux et les experts.

Abstract

This article presents how the housing variable can be mobilized in demographic projections and thus involve the demographer more in the field of territorial prospective at the local level. In the context of drawing up local urban and/or housing plans, demographers are often asked to determine the demographic changes that the local area might face. In this case housing is considered as a response to demographic projections. But at the local level, the direction of the relationship is reversed: within a catchment area of a few hundred square kilometers, inter-municipal residential mobility is most often determined by real estate opportunities. The small local areas can therefore be, via housing policies, actors in their demographic dynamics. This situation makes housing, at the local level, a central variable in the demographic projection exercise. It also involves renewing methods and mobilizing local planning actors in the definition of scenarios. The demographer is no longer just a service provider and becomes a partner for the territorial prospective at the local level. The prospective exercise is more and more frequently understood as an iterative process that relies on the exchanges between the local actors and experts.
Optimal level and order detection in wavelet decomposition for PCG signal denoising
Authors: Rouis Mohamed , Ouafi Abdelkrim , Sbaa Salim
Published: May 2018

The recorded phonocardiogram (PCG) signal is often contaminated by different types of noises that can be seen in the frequency band of the PCG signal, which may change the characteristics of this signal. Discrete wavelet transform (DWT) has become one of the most important and powerful tools of signal representation, but its effectiveness is influenced by the issue of the selected mother wavelet and decomposition level (DL). The selection of the DL and the mother wavelet are the main challenges. This work proposes a new approach for finding an optimal DL and optimal mother wavelet for PCG signal denoising. Our approach consists of two algorithms designed to tackle the problems of noise and variability caused by PCG acquisition in a real clinical environment for different categories of patients. The results obtained are evaluated by examining the coherence analysie (Coh) correlation coefficient (Corr) and the mean square error (MSE) and signal-to-noise ratio (SNR) in simulated noisy PCG signals. The experimental results show that the proposed method can effectively reduce noise.
A proposed decision support tool for prioritising conservation planning of Southeast Asian seagrass meadows: combined approaches based on ecosystem services and vulnerability analyses
Authors: Tan Yi Mei , Saunders Justine E. , Yaakub Siti Maryam
Published: May 2018

Seagrass habitats provide a range of goods and benefits to coastal communities by supporting ecosystem functioning, food provisioning, and cultural values. However, they are at risk worldwide from anthropogenic activities, climate change impacts and limited resources, which hamper efforts to protect them. Effective conservation planning requires prioritisation of sites based on multiple factors, including their relative value and vulnerability (VU). The current study examines the efficacy of combining two well-established approaches – ecosystem service assessments and habitat VU analyses – to test a method for determining conservation priority for selected seagrass meadows in Southeast Asia. Seven seagrass meadows around Southeast Asia were selected and scored by the authors based on (1) the cumulative contribution of 12 ecosystem services (ES) and the condition of the meadows, (2) VU from 16 anthropogenic threats, which were each ranked against five factors (spatial scale, frequency, functional impact, resistance and recovery time) and (3) the combination of the two approaches to create a single numerical index. Prioritisation of sites differed when meadows were scored solely for the ES they provide, compared to how vulnerable they are to anthropogenic threats. The new combined analysis brought the two metrics together to give conservation priority to sites where management intervention will yield maximum conservation benefits from conservation effort, and resulted in the prioritisation of three sites: Barrang Lompo (Indonesia), Cape Bolinao (Philippines) and Beting Tanjung Kupang (Malaysia). This method is easy to use and does not require great technical expertise. It is also auditable, allowing for clear and transparent understanding of decision-making process.
Ways of Knowing as a Framework for Developing Reflective Practice among Nursing Students
Authors: Campbell T. Diane , Penz Kelly , Dietrich-Leurer Marie , Juckes Karen , Rodger Kathy
Published: May 2018

Abstract Background:Nursing students face the challenge of developing a comprehensive understanding of the complex role of the registered nurse across various clinical settings. Frameworks such as the “ways of knowing”, help students conceptualize and critically reflect upon important processes in their professional learning. However, the academic language used to describe frameworks can be challenging. Purpose: This manuscript has two purposes. First, to briefly describe the historical climate influencing the development of nursing as a discipline. Second, two clinical practicum scenarios in acute care and community-based care are explored with the application of Carper’s four fundamental ways of knowing in nursing (empirical, aesthetic, self-knowledge, ethical), and Chinn and Kramer’s fifth, emancipatory, knowing as foundational to developing reflexivity in clinical practice. Conclusion: These practical descriptions and concrete examples can assist students in incorporating the five ways of knowing into their reflective practice and thereby more fully develop their construct of nursing.
Deficit distributions at ruin in a regime-switching Sparre Andersen model
Authors: Gajek Lesław , Rudź Marcin
Published: May 2018

In this paper, we investigate deficit distributions at ruin in
a regime-switching Sparre Andersen model. A Markov chain is
assumed to switch the amount and/or respective wait time distributions of
claims while the insurer can adjust the premiums in response.
Special attention is paid to an operator

𝐋

{\mathbf{L}}

generated by the risk process.
We show that the deficit distributions at ruin during n periods, given the state of the Markov chain at time zero,
form a vector of functions, which is the n-th iteration of

𝐋

{\mathbf{L}}

on the vector of functions
being identically equal to zero. Moreover, in the case of infinite
horizon, the deficit distributions at ruin are shown to be a fixed point of

𝐋

{\mathbf{L}}

.
Upper bounds for the vector of deficit distributions at ruin are also proven.
Analgesic, anti-inflammatory and anti-arthritic properties of aqueous and methanolic stem bark extracts from Nauclea pobeguinii (Rubiacee) in rats
Authors: Marius Mbiantcha , Gonzal Tsafack Eric , Gilbert Ateufack , William Nana Yousseu , Francis Désiré Bomba Tatsinkou , Stephanie Flore Djuichou Nguemnang , Sorelle Mbankou Ngassam , Marius Tresor Wego Kamgaing
Published: May 2018

Background

Nauclea pobeguinii is a plant species found in the centre region of Cameroon. The stem bark of this plant is traditionally used to ease pain and cure inflammation.

Method

This study was undertaken to evaluate the effects of doses 150 and 300 mg/kg of the aqueous and methanolic stem bark extracts from Nauclea pobeguinii on acute pain, acute and chronic inflammation induced by formalin and arthritis induced by zymosan A in rats. Oxidative stress parameters such as catalase, malondialdehyde and nitric oxide were measured in rats subjected to chronic inflammation. The standard used was diclofenac at 5 mg/kg.

Results

Aqueous extract as well as methanolic extract of Nauclea pobeguinii led to a significant reduction in the second phase of formalin induced pain with 54.22 and 48.02% of inhibition percentage, respectively. The formalin-induced inflammatory oedema was reduced by both extracts, and this effect remains significant until the tenth day of treatment. Equally, extracts significantly increased the catalase activity and inhibited the production of malondialdehyde (MDA) in serum, brain and spinal cord and NO reduction only in serum. Both extracts significantly reduced the articular oedema induced by zymosan A for 6 h and for 5 days. Furthermore, the histological study of the articulations shows a non-altered synovial membrane and a small cartilage in all treated animals versus negative control group.

Conclusions

From these results, it can be concluded that pain, inflammation and arthritic healing activities of both stem bark extracts were expressed in rats and could conciliate the use of this vegetable by traditional African healers.
First record ofMus cookii(Cook’s mouse) from Pothwar, Pakistan: a probable case of range extension?
Authors: Bibi Shahnaz , Nadeem Muhammad Sajid , Anwar Muhammad Bilal , Shah Syed Israr , Kayani Amjad Rashid , Mushtaq Muhammad , Beg Mirza Azhar , Mahmood Tariq
Published: May 2018

The Southeast Asian speciesMus (Mus) cookiiRyley 1914 has been previously reported from southern China, Nepal, northeastern and peninsular India, Myanmar, north and central Thailand and Vietnam. A cytochromeb(Cytb) gene analysis revealed the presence ofM. cookiiwhich significantly expands the known western range of this species. However, it is unclear whether theM. cookiipopulation in the Pothwar region represents a historical or recent westward range expansion or, on the contrary, a relictual source population that further experienced an historic eastward range expansion into Southeast Asia.