bluuebunny/crossref_metadata_2025 huggingface dataset:
Çocuklu ailelerin restoran seçimini etkileyen faktörlerin incelenmesi: Çanakkale örneği
Authors: TEMELOĞLU Erdem , AKSU Murat
Published: April 2021

Tüketicilerin satın alma karar sürecinde kararlarını etkileyen birçok faktör bulunmaktadır. Bu faktörlerin hangi düzeyde etkili olduğunu bilmek etkili bir pazarlama oluşturma açısından önemli olmaktadır. Çocuklu aileler satın alma kararı verirken çocuklarını da göz önünde bulundurmaktadır. Bu nedenle çocukların, ailelerin satın alma kararlarını ne düzeyde etkilediğini bilmek restoran işletmeleri için başarı açısından önemli olmaktadır. Bu noktadan hareketle, çalışmanın amacı 8 yaş ve altı çocuklu ailelerin restoran seçiminde etkisi olan faktörlerin belirlenmesi ve bu faktörlerin etki düzeylerinin tespit edilmesi oluşturmaktadır. Bu amaca uygun olarak Çanakkale il merkezinde yaşayan 8 yaş ve altı çocuk sahibi olan 216 kişiye anket uygulanmıştır. Çalışma bulgularına göre restorana ait fiziki özellikler aileler tarafından restoran seçiminde en fazla önemsenen faktör olduğu tespit edilmiştir. Bunu sırasıyla restoran hizmetleri faktörü ve personel faktörü takip etmektedir. Ayrıca, restoranlarda çocukların kullanımına uygun lavaboların bulunması, restoran içerisinde çocukların yaralanmasına sebep olabilecek sivri noktaların bulunmaması, bebek maması hazırlamak için uygun bir alanın bulunması ve fiyatlarda çocuklara yönelik indirim uygulanması ailelerin restoran tercihinde önem verdikleri diğer hususlar olarak ön plana çıkmaktadır.
Relationship between futures contracts and macroeconomic variables: viop30 and dollar futures contracts application
Authors: KARATAŞ ELÇİÇEK Yasemin , KAYALIDERE Koray
Published: April 2021

As a result of the fluctuations in the financial markets and an increase of uncertainties in the markets, the investors are obliged to make effective risk management. Due to this obligation, one of the methods preferred by investors in managing their risks has been to perform their transactions in futures markets. In this context, the aim of the study is to determine the macroeconomic dynamics that affect the VIOP30 and Dollar futures contracts traded in the Futures and Options Market in January 2013 and December 2017, based on return and volatility. For this purpose, monthly frequency data of 11 macroeconomic variables, which are frequently used in the related literature and expected to affect return and volatility, were used. In the study, the relationship between variables was examined by the ARDL bounds testing method. In the results of the study, while there were statistically significant results in the short and long term between some macroeconomic variables and the futures contract returns and volatility in question, no significant results were obtained with some variables. It is thought that the findings will contribute to the related literature.
Investigation of career stress of tourist guide candidates
Authors: KAN SÖNMEZ Neslihan
Published: April 2021

The greatest expectation of university students is to find a job in the field they have received education and to have a successful career. Students' stress on whether or not they can achieve these goals after graduation is a significant issue. Determining the perceptions of students related to career stress will contribute to reducing the sources of stress. In this study carried out to specify the career stress of tourist guide candidates, the sample group consisted of 210 students enrolled in Afyon Kocatepe University, Faculty of Tourism, Department of Tourism Guiding. The data collected by questionnaire were analysed by statistical techniques, such as frequency and percentage distribution, arithmetic mean, standard deviation, t-test and analysis of variance. The obtained data suggested that general career stress levels of tourist guide candidates were below moderate level. Of the career stress factors, “career ambiguity and lack of information” and “employment pressure” were calculated the highest mean values. In addition, career stress levels of tourist guide candidates differed significantly according to gender, age, grade, status of working in the tourism sector.
YEREL YÖNETİMLERDE KARAR ALMA SÜRECİ: ADANA KENTSEL OTOBÜS ULAŞIM HİZMETLERİ ÜZERİNE BİR İNCELEME
Authors: ŞAHİN Şule , AKTEPE Eray
Published: April 2021

Hızla artan kentleşme ve nüfus yoğunluğuna paralel olarak kontrolsüz bir şekilde büyüyen kent makroformuna karşılık kent mekanında yaşanan bu büyüme nedeniyle artan ulaşım hizmet taleplerinin karşılanamaması günümüzde büyükşehirlerin en büyük sorunları olarak karşımıza çıkmaktadır. Sorunun çözümü noktasında oluşturulan koordinasyon merkezleri, hizmet sınırları içerisinde ulaşımı kesintisiz sağlamak konusunda vatandaşa karşı sorumluluğu olan belediye yönetimlerinin kentsel ulaşım hizmet sunumunda mali ve idari yetersizliklerden dolayı başarısız olmasıyla toplu taşımacılık sektörünün bir parçası haline gelen özel teşebbüslerin meydana getirdiği çok katmanlı karar mekanizmaları ve çok aktörlü yapının incelenmesini elzem kılmaktadır. Kentsel ulaşım hizmetlerinin kim tarafından sağlanacağı, nasıl sağlanacağı, hangi karar mekanizmaları ve aktör yapısına sahip olacağı gibi sorular, kentsel ulaşım talep ve ihtiyaçlarının giderilebilmesi, belirli bir eşgüdüm, uyum ve düzen içerisinde hızlı, etkin, verimli ve erişilebilir bir ulaşım koordinasyonunun sağlanması adına cevaplanması gereken sorulardır. Bu sorular ışığında çalışmanın temel amacı, Adana ili örneği üzerinden kent içi otobüs ulaşım hizmetlerinin karar alma, hizmetin sevk ve idaresi ve sunum süreçlerini irdelemektir. Çalışmada 1998-2020 yılları arasında Adana Büyükşehir Belediyesi Ulaşım Koordinasyon Merkezi Genel Kurulu’nda alınan kararların tümü incelenmiş olup karar tipleri, karar sayılarının yıllara göre yüzdelik değişimi, karar sonuçları, kararlar alınırken incelemeler yapan komisyon çeşitleri, hangi konular üzerinde kararlar alındığı ve karar mekanizmasında yer alan çoklu aktörel yapılar ele alınmıştır. Çalışmada, kent içi otobüs ulaşım hizmetlerinin verilmesi aşamasında karar alma süreci, sürecin sevk ve idaresi ve hizmetin sunumu aşamalarında farklı aktörlerin baskın olduğu ve bu durumun her aşamada farklı çatışmaları beraberinde getirdiği vurgulanmaktadır.
Electromagnetic and non-Darcian effects on a micropolar non-Newtonian fluid boundary-layer flow with heat and mass transfer
Authors: Ouaf Mahmoud Elhassan Mahmoud , Abou-zeid Mohamed Yahya
Published: April 2021

The purpose of this paper is to investogate the ectromagnetic and micropolar properties on biviscosity fluid flow with heat and mass transfer through a non-Darcy porous medium. Morever, The heat source, viscous dissipation, thermal diffusion and chemical reaction are taken into consideration. The system of non linear equations which govern the motion is transformed into ordinary differential equations by using a suitable similarity transformations. These equations are solved by making use of Rung–Kutta–Merson method in a shooting and matching technique. The numerical solutions of the velocity, microtation velocity, temperature and concentration are obtained as a functions of the physical parameters of the problem. Moreover the effects of these parameters on these solutions are discussed numerically and depicted graphically. It is found that the microtation velocity increases or deceases as the electric parameter, Hartman parameter and the microrotation parameter increase. Morever, the temperature increases as Forschheimer number, Eckert number increase.
A novel artificial intelligence model for color image quality assessment for security enhanement weighted by visual saliency
Authors: Chen Zhongshan , Zhang Shengwei , Zhang Juxiao , Hu Zuojin , Han Xue , Xu Mengyang
Published: April 2021

Artificial Intelligence (AI) is the enhancement and method of computer system that handles tasks which requires human like intelligence such as recognition, language translation and visual interpretation. Subjective image quality assessment (IQA) is difficult to be implemented in real-time systems, methodology for enhancing the involvement in producing IQA model is to improve the quality of image by significant evaluation. Intuitively, human eyes are not sensitive to the distortion and damage from the area with lesser visual saliency (VS), VS is closely related to IQA. With this consideration, an effective IQA was proposed, which involved two processes. The local quality map of a distorted image was computed using the structural similarity function of its feature attributes, such as brightness, chrominance and gradient. Second, the local quality map was weighted with visual saliency (VS) to get the objective evaluation of image quality. The VS was modeled by extracting the saliency of low-level features of the image, wiping off the molestation information from these saliency based on an apriori threshold, and combining the effective information to construct the saliency map. Image processing using fuzzy is gathering features and segments as fuzzy set while processing images. The experiments on the two largest database for six classical IQA metrics demonstrate that performance of weighted-VS IQA metrics is superior to the performance of no weighted-VS IQA metrics, and the proposed IQA method has higher computational accuracy than the other IQA metrics under a moderate computational complexity, especially for two types of distortion images, such as local block-wise (Block) and fast-fading (FTF).
Advertising in pervasive computing age: Understanding the lifestyles of the new middle class in emerging markets
Authors: Li Wenhua , Xiao Jiaxin
Published: April 2021

Computing and Artificial Intelligent technology has changed the ecosystem of advertising industry and social economy. Observations on social changes can help enterprises and advertisers better adapting to this pervasive computing age. This study aims to examine the lifestyles of the new urban middle class in emerging market and their attitudes towards advertising. We carried out an investigation in four Tier-1 cities in China and identified six comprehensive lifestyle factors: trendy and success-driven, “Western is best,” petty bourgeoisie lifestyle, money conscious, lifestyle of health and sustainability, and pragmatic struggling lifestyle; and further segmented new urban middle-class consumers into four groups: experiencers, strivers, trendy achievers, and pragmatists. The attitudes of four lifestyle segments towards advertising have been examined. The study provides precise user portraits of the growing middle-class consumers and intra-class differences in the emerging market.
Hybrid online model based multi seasonal decompose for short-term electricity load forecasting using ARIMA and online RNN
Authors: Dat Nguyen Quang , Ngoc Anh Nguyen Thi , Nhat Anh Nguyen , Solanki Vijender Kumar
Published: April 2021

Short-term electricity load forecasting (STLF) plays a key role in operating the power system of a nation. A challenging problem in STLF is to deal with real-time data. This paper aims to address the problem using a hybrid online model. Online learning methods are becoming essential in STLF because load data often show complex seasonality (daily, weekly, annual) and changing patterns. Online models such as Online AutoRegressive Integrated Moving Average (Online ARIMA) and Online Recurrent neural network (Online RNN) can modify their parameters on the fly to adapt to the changes of real-time data. However, Online RNN alone cannot handle seasonality directly and ARIMA can only handle a single seasonal pattern (Seasonal ARIMA). In this study, we propose a hybrid online model that combines Online ARIMA, Online RNN, and Multi-seasonal decomposition to forecast real-time time series with multiple seasonal patterns. First, we decompose the original time series into three components: trend, seasonality, and residual. The seasonal patterns are modeled using Fourier series. This approach is flexible, allowing us to incorporate multiple periods. For trend and residual components, we employ Online ARIMA and Online RNN respectively to obtain the predictions. We use hourly load data of Vietnam and daily load data of Australia as case studies to verify our proposed model. The experimental results show that our model has better performance than single online models. The proposed model is robust and can be applied in many other fields with real-time time series.
Fuzzy comprehensive evaluation of maritime boundary delimitation schemes based on AHP-entropy weight method
Authors: Wang Degang , Li Dongling , Sun Li , Zhang Zhenke , Cheng Jie , Yu Miao
Published: April 2021

There are 11 provinces along the coastal regions in the Chinese Mainland and the scientific division of marine management boundaries among different provinces within the extents of the territorial sea is of important significance in promoting the sustainable development of the marine economy in China. A fuzzy evaluation index system that includes 14 indices of three subsets was established based on a case study of maritime boundary delimitation between Jiangsu and Shandong Provinces to evaluate the advantages and disadvantages of maritime boundary delimitation and determine the optimal scheme and offset shortages in the current evaluation index system and evaluation methods. Combined weights of indices were calculated through the analytic hierarchy process (AHP) and entropy weight method. The comprehensive evaluation indices were used to evaluate three maritime boundary delimitation schemes, namely, historical boundary delimitation scheme, angle bisector delimitation scheme, and equidistance delimitation scheme. Results show that the equidistance delimitation scheme is relatively superior to the two other schemes. The evaluation index is 0.504761 and the evaluation grade is “good”. The angle bisector delimitation scheme is the second optimal. The evaluation index is 0.361641 and the grade is “moderate”. The historical boundary delimitation scheme is the poorest. The evaluation index is 0.135345 and the grade is “poor”. In the late optimization of maritime boundary delimitation schemes, more consideration should be given to people’s livelihood and protection of national maritime rights and interests. The fuzzy comprehensive evaluation method based on AHP-entropy weight can not only provide a quantitative top-down sequence of schemes in terms of quality and solve estimation problems in maritime boundary delimitation scheme, but also assist decision-makers to select the best scheme. Therefore, it possesses great application values.
Spatial effect of port service coordination of Yangtze River Delta in China based on fuzzy clustering and gravitational model
Authors: Zhaohua Leng
Published: April 2021

With the prevalence of international trade protectionism and transformation and upgrading of domestic market structure, the contradiction between demand and competitive development port market of the Yangtze River Delta in China has become increasingly prominent. Nineteen major ports of Yangtze River Delta in China were selected, using the methods of factor analysis, fuzzy clustering, gravitational model, the spatial effects in the hinterland were calculated from three dimensions: central potential, spatial gravity and distribution convenience, and the regional coordination of port services was analyzed. The results show that the potential of Shanghai Port and Ningbo-Zhoushan Port in China is stronger, and the distribution difference is quite obvious. The spatial gravity of each port city superimposes to form an obvious dense semi-circular zone, and the participation ability of the marginal ports is weak. The distribution convenience in hinterland changes from location-dependent to traffic-dependent. The service gap in the hinterland of the port system is more significant, but the expansions of spatial effects make regional coordination gradually improve.
Collaborative task scheduling with new task arrival in cloud manufacturing using improved multi-population biogeography-based optimization
Authors: Dai Ziwei , Zhang Zhiyong , Chen Mingzhou
Published: April 2021

Task scheduling is important in cloud manufacturing because of customers’ increasingly individualized demands. However, when various changes occur, a previous optimal schedule may become non-optimal or even infeasible owing to the uncertainty of the real manufacturing environment where dynamic task arrival over time is a vital source. In this paper, we propose a novel collaborative task scheduling (CTS) model dealing with new task arrival which considers multi-supply chain collaboration. We present an improved multi-population biogeography-based optimization (IMPBBO) algorithm that uses a matrix-based solution representation and integrates the multi-population strategy, local search for the best solution, and the collaboration mechanism, for determining the optimal schedule. A series of experiments are conducted for verifying the effectiveness of the IMPBBO algorithm for solving the CTS model by comparing it with five other algorithms. The experimental results concerning average best values obtained by the IMPBBO algorithm are better than that obtained by comparison algorithms for 41 out of 45 cases, showing its superior performance. Wilcoxon-test has been employed to strengthen the fact that IMPBBO algorithm performs better than five comparison algorithms.
On local multigranulation covering decision-theoretic rough sets
Authors: Li Mengmeng , Zhang Chiping , Chen Minghao , Xu Weihua
Published: April 2021

Multi-granulation decision-theoretic rough sets uses the granular structures induced by multiple binary relations to approximate the target concept, which can get a more accurate description of the approximate space. However, Multi-granulation decision-theoretic rough sets is very time-consuming to calculate the approximate value of the target set. Local rough sets not only inherits the advantages of classical rough set in dealing with imprecise, fuzzy and uncertain data, but also breaks through the limitation that classical rough set needs a lot of labeled data. In this paper, in order to make full use of the advantage of computational efficiency of local rough sets and the ability of more accurate approximation space description of multi-granulation decision-theoretic rough sets, we propose to combine the local rough sets and the multigranulation decision-theoretic rough sets in the covering approximation space to obtain the local multigranulation covering decision-theoretic rough sets model. This provides an effective tool for discovering knowledge and making decisions in relation to large data sets. We first propose four types of local multigranulation covering decision-theoretic rough sets models in covering approximation space, where a target concept is approximated by employing the maximal or minimal descriptors of objects. Moreover, some important properties and decision rules are studied. Meanwhile, we explore the reduction among the four types of models. Furthermore, we discuss the relationships of the proposed models and other representative models. Finally, illustrative case of medical diagnosis is given to explain and evaluate the advantage of local multigranulation covering decision-theoretic rough sets model.
Fuzzy ∗–ideals and their applications in characterizing abundance and regularity of a semigroup
Authors: Li Chunhua , Xu Baogen , Huang Huawei
Published: April 2021

In this paper, the notion of a fuzzy *–ideal of a semigroup is introduced by exploiting generalized Green’s relations L * and R * , and some characterizations of fuzzy *–ideals on an arbitrary semigroup are obtained. Our main purpose is to establish the relationship between fuzzy *–ideals and abundance for an arbitrary semigroup. As an application of our results, we also give some new necessary and sufficient conditions for an arbitrary semigroup to be regular and inverse, respectively.
Employment status in people with relapsing multiple sclerosis from Argentina: Impact of disability and neuropsychological factors
Authors: Carnero Contentti Edgar , López Pablo Adrián , Pettinicchi Juan Pablo , Tkachuk Veronica , Balbuena María Eugenia , Caride Alejandro
Published: April 2021

BACKGROUND: Unemployment is common in people with multiple sclerosis (PwMS) and might be prevented if factors associated with work loss are identified. OBJECTIVE: We aimed to assess the impact of multiple sclerosis (MS) on employment status in a cohort of PwMS from Argentina and to evaluate their association with anxiety, depression, fatigue and disability. METHODS: A cross-sectional study was conducted to assess employment in PwMS using an anonymous, self-administered questionnaire, which also included the Hospital Anxiety and Depression Scale, Fatigue Severity Scale and Expanded Disability Status Scale. The data was compared between employed (full-time vs. part-time) vs. unemployed (looking for vs. not looking for work) PwMS. Univariate and multivariate models were designed to identify factors independently associated with unemployment. RESULTS: Among the 167 PwMS, 120 (71.6%, full-time = 65%) were employed, and 47 (28.4%, looking for work = 27.6%) were currently unemployed. Age, gender, and duration of disease were similar in both groups. Univariate analysis showed that anxiety, depression, fatigue and disability were significantly associated with unemployed PwMS. However, only disability (OR = 1.36 (1.08–1.70), p = 0.007) was independently associated with unemployment after applying multivariate analysis (logistic regression). CONCLUSION: Nearly one-third of PwMS from this sample in Argentina were unemployed. Neuropsychological factors and disability were associated with unemployment status.
Pro bono communi
Authors: Redacción Consejo de
Published: April 2021

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Colombia por la formación profesional obrera
Authors: Díaz Espelosín, S. J. Fernando
Published: April 2021

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Estadística Religiosa
Authors: Del Valle F.
Published: April 2021

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Purification and characterization of A[beta] and probing the interactions between myricetin and A[beta] using various spectroscopic methods
Authors:   , Wang Mingjuan
Published: April 2021

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Worldwide, millions of people suffer from symptoms of memory loss and confusion associated with Alzheimer's disease (AD). Mounting evidence suggests a close relationship between AD and aggregation of a naturally occurring protein fragment, the amyloid [beta]-peptide (A[beta]). Soluble oligomers of A[beta] are now considered to be the primary neurotoxic agent. Naturally occurring flavonoid compounds have been reported to inhibit/reverse A[beta] aggregation and reduce the A[beta]-induced neurotoxicity both in vitro and in vivo. Previous spectroscopic studies suggest multiple forms of interaction between A[beta] and myricetin, a flavonoid compound. In this study, two A[beta] fragments, A[beta](1-16) and A[beta](25-40), together with A[beta](1-42) were investigated. HPLC purification was conducted on crude A[beta](1-16) and A[beta](25-40) using a Beckman System Gold HPLC system, a Vydac C18 column and a combination of acetonitrile and water as mobile phase. The purified A[beta](1-16) and A[beta](25-40) has a purity of 91% and 90%, respectively. CD, UVRR spectroscopy and DLS have been employed to study the different aggregation states of A[beta](1-42) obtained by using 10 kDa and 30 kDa molecular weight cut-off filters or unfiltered (referred to LMW, IMW and HMW A[beta](1-42)). The studies have shown that LMW A[beta](1-42) is fully unstructured, containing oligomers up to tetramers; IMW A[beta](1-42) is likely a combination of disordered and some [beta]-sheet structure, containing large aggregates ranging from 30 kDa to 60 kDa; whereas HMW has high content of large aggregates. The solution conformation of A[beta] and A[beta] fragments were characterized using CD and UVRR spectroscopic methods. Both A[beta](1-42) and A[beta](25-40) are fully unordered, whereas A[beta](25-40) is likely has higher content of [beta]-strand structure. A[beta](1-16) is predominantly PPII structure. Various spectroscopic methods were employed to investigate the binding interactions between disordered A[beta] and myricetin, one of the flavonoid compounds. A[beta]-myricetin complex formation was visualized by myricetin's intrinsic fluorescence. ThT fluorescence assay and CD study showed that myricetin can inhibit A[beta](25-40) and A[beta](1-42) from forming [beta]-sheet structured fibril. CD and UVRR studies further evidenced conformational changes from both A[beta](25-40) and A[beta](1-42) induced by myricetin. In parallel, UV resonance Raman spectra indicate that the environment around one or more of the aromatic residues is altered when myricetin is present. These findings suggest that both hydrophobic interaction and hydrophilic interaction play a role in the binding of myricetin with A[beta].
Talking beyond the text: identifying and fostering critical talk in a middle school classroom
Authors:   , Wilson Jennifer L.
Published: April 2021

This qualitative inquiry examined eighty-one transcribed student and teacher discussions and interviews and researcher field notes to determine the type of talk that occurred as the teacher invited small groups of students to take part in dialogue prompted by literature. Four themes emerged from the data: teacher's knowledge, processing time, various forms of scaffolding, and oral rubrics. During in-depth analysis of ten selected transcripts, additional themes of the nature of critical talk emerged. First, students explored critical concepts such as recognizing a need for action, becoming aware of injustices, and challenging the status quo. Also, student talk scaled the ladder of abstraction, offering concrete examples that made their discussions more applicable to their lives, while at the same time traveling up the ladder, abstracting the is sues to begin to explore larger more systemic causes of particular injustices. Second, some students believed that they were changed by the interactions while others felt as if they had gained new understandings of particular concepts, issues, or beliefs. A continuum of the type of student talk shows how students' talk moves among social talk, fundamental text talk, socio-interpretive text talk,critical talk, and critical conversations. As students traverse along the continuum, various needs can be met. As teachers recognize where students' talk is on the continuum, they can lead students to deeper literature study discussions. In order to help students take a more critical approach when discussing texts, teachers must scaffold the talk and provide the time for students to grapple with critical concepts.
Parent/child distal relationships: a look at communication used before, during, and after a parental absence
Authors:   , Pollom Laura Hudson
Published: April 2021

This project examined communication in distal parent-child relationships. Distal relationships are relations in which people are physically separated for a period of time. Little research has focused on distal relationships, but they are a common form of family relationship, and often have considerable impact on all family members. In this study, the focus was families which had a parent leave their partner and child(ren) for 2 months or longer. The study investigated uncertainty reduction and uncertainty management among family members, using systems theory as a general framework for analysis. Participants were 54 parents and children from families who had a parent separated by incarceration or military deployment. Participants were interviewed individually about their experiences within 2 years of the parent's return. Results showed that families who communicated about the absence before departure had less of a negative impact on children's well-being. In addition, this study advances maintenance and uncertainty literature by illustrating that these participants maintained their relationships while the parent was absent by using a set of communication strategies and by managing their emotional climate with three closeness techniques and three distancing techniques. Results illustrated that the return home of the parent was often difficult with issues pertaining to responsibilities, regaining trust, and role changes. The findings in this study have implications for research on communication and meaning, regulating closeness and distance in relationships, and use of relational maintenance behaviors. The findings both support and add to previous research done on personal and family relationships.
Investigation of a spatial optical pulse collection system in the all-optical analog-to-digital converter
Authors:   , Yang Wen-Ren
Published: April 2021

In this research, I conducted a systematic integration of specific calculations for the analysis of the spatial filter that is a critical component of an all-optical analog-to-digital converter. The designed all-optical analog-to-digital converter has special relevance for high-resolution [x] bandwidth applications such as radar image processing. The design of the spatial filter array is based on the silicon-on-insulator process, a design that fulfills requirements of both lower power consumption and smaller integrated circuit chip size. For the developed calculation model, Babinet's principle is used in order to decompose a complicated structure into different simple components. The decomposed structure is analyzed by modifying the existing diffraction calculation methods. The method of calculating the transmission ratio of the propagating electric field compared to the finite-different-time-domain method is a new approach. The systematic integration is also adaptive to changes in the spatial filter's components. Structural changes do not require changes to the entire calculation model.
Theory of lattice effects on magnetic interactions in solids
Authors:   , Meskine Hakim
Published: April 2021

This dissertation focuses on studying the effect of lattice distortions on the magnetic properties of nickelates and manganites. These two families of materials have great potential in industrial applications in the fields of magnetic (superdense hard-drives, fast memory) and charge storage (batteries). The introduction and methods sections present the main ideas of the dissertation and discuss the various techniques used. Electron-lattice coupling is first examined in chapter three for a two-site model where we estimate the magnitude of the isotope effect on the critical temperature and show that it decreases magnetic exchange. In the next part we study electronic structure and magnetism of NaNiO2 and show that inter-planar exchange is reduced by lattice coupling. In the fifth chapter we examine the magnetic polaron and discuss the effect of static lattice coupling on its binding energy, and find it to further stabilize the polaron.
A theoretical model of piano sightplaying components
Authors:   , Udtaisuk Dneya Bunnag
Published: April 2021

The goal of this study is to provide a theoretical model regarding sightplaying phenomena based upon investigation, analysis, and synthesis from a large amount of research findings, observation results, theoretical ideas, teaching methods, and perspectives from various fields of study including psychology of music, music education, psycho-musicology, and neurological science. Specifically, the focus of the study is on an individual's ability to sightplay on the piano. As a result of an extended review of literature, the author proposed a generalized picture about the possible components shown to be involved in the process of sightplaying development as well as sightplaying performance. With a qualitative philosophy as the research methodology and multiple perspectives in mind, the author believes that the model describing the four sightplaying components, CAPE: physical Coordination, musical Awareness, musical Potential, and musical Experiences, is useful as an instructional and experimental guideline for investigating and understanding a unique sightplaying ability in each individual as well as sightplaying performance in different circumstances. When using this model, music educators and researchers need to be aware that variations among levels or differences in the strengths of the component have not been predicted by this model. Any generalizations and implications need to be drawn with appropriate caution.
Analysis of the Caenorhabditis elegans rpc-1 gene
Authors:   , Zheng Qun
Published: April 2021

In eukaryotes, two large subunits form the core catalytic structure of RNA polymerase III (Pol III), which is conserved in other RNA polymerases, Pol I and Pol II. It has been found that Pol III activity is tightly associated to cell growth. TFIII B has been shown to be one of main mediators in this process. No regulation of the Pol III largest subunit gene has been found. In C. elegans, the rpc-1 gene encodes the largest subunit of Pol III. Here, I identified two critical structural components of RPC-1, Gly644 and Gly1055, whose mutations result in larval lethal arrestment. These two amino acid residues are universally conserved in RNA polymerases, indicating their overall involvement in gene transcription mechanism. Also, I found that maternally inherited, not embryonically expressed, rpc-1 gene products survive early development. Starvation was found to suppress rpc-1 gene expression and re-feeding treatment enhances rpc-1 gene expression rapidly. No similar regulation was detected in genes encoding largest subunits of Pol I and Pol II. This is the first time that rpc-1 gene regulation has been reported. Insulin signaling may not be involved in this regulation. Also, I found that rpc-1 promoter is not ubiquitously active in C. elegans. Using the rpc-1p::gfp transgene, the rpc-1 promoter activity is only detected in a subset of neurons in the head and the tail and the intestine. While starvation silences the rpc-1 promoter activity in most tissues and cells, ASK neurons still show GFP staining in the rpc-1p::gfp transgenic animals, indicating that rpc-1 transcription in ASK neurons is continuously active under starvation conditions. Further studies suggest that TGF-[beta] signaling is involved in mediating the rpc-1 promoter activity in ASK neurons.
Examining secondary students algebraic reasoning: flexibility and strategy use
Authors:   , Townsend Brian E.
Published: April 2021

Recent curricular recommendations (NCTM, 2000; RAND, 2003) call for the development of student flexibility in relation to algebraic reasoning. In response to these recommendations, this study focused on the algebraic strategies employed by the participants and their flexibility in understanding various generalization strategies when generalizing numeric situations. Algebraic flexibility consisted of two components: (a) Within-task flexibility (recognizing appropriate generalization strategies that could be used for a particular task) and cross-task flexibility (recognizing when a generalization strategy could be applied to various tasks). Eleven tenth-grade students from two rural schools participated in active interviews (Holstein and Gubrium, 1995) centered on developing generalizations for contextualized algebraic tasks. Following the development of a generalization for a particular task, participants were provided alternative student strategies to examine.The results demonstrated that secondary students employ the same generalization strategies as elementary and middle level students: explicit, whole-object, recursive, and chunking. Participants used recursive (92.3%) and chunking (90%) strategies with the greatest success, while the explicit strategy was the least effective (correctly used 60% of the time). Participants classified as exhibiting a high level of flexibility did not necessarily demonstrate that ability in initially generalizing tasks. The participants fell along a range for both within-task and cross-task flexibility. Participants classified as exhibiting a high level of flexibility were able to determine the applicability of a strategy and develop contextually-justified rules. Students with low flexibility were unable to determine the applicability of a strategy or justify their rules.
On the spectra of SchroÌˆdinger and Jacobi operators with complex-valued quasi-periodic algebro-geometric coefficients
Authors:   , Batchenko Vladimir
Published: April 2021

In this thesis we characterize the spectrum of one-dimensional SchroÌˆdinger operators. H = -d2/dx2+V in L2(R; dx) with quasi-periodic complex-valued algebro geometric, potentials V (i.e., potentials V which satisfy one (and hence infinitely many) equation(s) of the stationary Korteweg-de Vries (KdV) hierarchy) associated with nonsingular hyperelliptic curves. The spectrum of H coincides with the conditional stability set of H and can explicitly be described in terms of the mean value of the inverse of the diagonal Green's function of H. As a result, the spectrum of H consists of finitely many simple analytic arcs and one semi-infinite simple analytic arc in the complex plane. Crossings as well as confluences of spectral arcs are possible and discussed as well. These results extend to the Lp(R; dx)-setting for p 2 [1,1). In addition, we apply these techniques to the discrete case and characterize the spectrum of one-dimensional Jacobi operators H = aS+ + a-S- b in 2(Z) assuming a, b are complex-valued quasi-periodic algebro-geometric coefficients. In analogy to the case of SchroÌˆdinger operators, we prove that the spectrum of H coincides with the conditional stability set of H and can also explicitly be described in terms of the mean value of the Green's function of H. The qualitative behavior of the spectrum of H in the complex plane is similar to the SchroÌˆdinger case: the spectrum consists of finitely many bounded simple analytic arcs in the complex plane which may exhibit crossings as well as confluences.
Religious involvement, attitudes toward seeking professional psychological help, and preferences for alternative mental health settings
Authors:   , Hathaway Stefani
Published: April 2021

Religion is an important diversity variable; however, it is an understudied area in psychology. The purpose of this study was to explore ways that religious factors interact with help-seeking attitudes as well as preferences for different help sources. Participants were 236 church members from 4 Christian groups. They completed religious measures, a help-seeking measure, and responses to mock brochures for traditional, nontraditional, and Christian mental health facilities. Both demographic and religious variables were found to predict help-seeking attitudes, although the relationships between help-seeking and religious predictors were less clear. Denominational differences were found in many of the religious variables. Several religious variables were related to the brochure responses, and the four denominations showed different patterns of preference for the brochures. Limitations and implications for practice and research are discussed.
A study on the trade-off between supervision and wages: an empirical test of efficiency wage theory
Authors:   , Oh Min-Hong
Published: April 2021

This dissertation investigates the applicability of the shirking version of efficiency wage models in Korea. Analyses is based on the Survey on Wage Structure in the 1980's and 1990's - using data collected in 1983, 1989, 1993, 1996, and 1999. Efficiency wage theory predicts a negative relationship between supervision and wages: employers may choose either to pay a wage premium or to increase the level of supervisory intensity to force workers to exert more effort. The relation between supervisory intensity, as measured by the ratio of supervisors to supervisees in a firm, and wages is explored. Interaction effects between supervisory intensity and employer characteristics on wages are also investigated in more detailed analyses. Finally, we explore whether supervisory intensity is able to explain inter-industry wage differentials. The evidence suggests that supervisory intensity is positively correlated with wages, implying the efficiency wage model is not applicable in Korea. Industrial interaction analysis shows weak evidence of efficiency wages in the social service sector, but there are no apparent patterns in other industries. In occupational interaction analysis, efficiency wages are paid to drivers and sales workers. Although supervisory intensity does not explain wage variation across industries, there are significant inter-industry wage differentials observed in Korea.
S-RNase proteins: functional studies of the 120kDa glycoprotein and SRNase oligomerization
Authors:   , Hancock Charles Nathan
Published: April 2021

Flowering plants control fertilization through pollen-pistil interactions. Self-incompatibility (SI) is a well-studied pollen-pistil interaction that promotes cross-pollination. SI is controlled by a multi-haplotype locus called the S-locus. In Nicotiana alata, S-RNase is a product of the S-locus and regulates specificity in the pistil, while S-locus F-box protein (SLF) controls specificity in the pollen. The interaction between S-RNase and SLF determines whether the pollination is compatible or incompatible. In an incompatible cross, the ribonuclease activity of S-RNase inhibits pollen tube growth. Genetic experiments indicate that, in addition to S-RNase and SLF, non-S-factors are also required for SI. S-RNase binding proteins represent potential non-S-factors required for SI. Using affinity chromatography, we found that S-RNase selfassociates and three homologous stylar glycoproteins - the 120kDa glycoprotein (120K), N. alata pistil extensin-like protein III (NaPELP III), and N. alata transmitting tract specific glycoprotein (NaTTS) - bind directly to S-RNase. I studied the oligomerization of S-RNase in detail and found that self-association is dependent on S-haplotype and buffer conditions. I determined that the components of the S-RNase complex account for 30% of soluble pistil protein. 120K is the most likely candidate for a non-S-factor because it enters the cytoplasm of growing pollen tubes and shows polymorphism when SI and self-compatible Nicotiana species are compared. To test its role in SI, I suppressed 120K expression using RNAi. Suppressing 120K caused a breakdown of SI, confirming that it functions in SI.
The development of pedagogical content knowledge of a mathematics teaching intern: the role of collaboration, curriculum, and classroom context
Authors:   , Stevens Bridgette Bond Almond
Published: April 2021

In this study I examined the role of collaboration, curriculum, and the classroom context in the development of pedagogical content knowledge of a mathematics teaching intern. Additionally, I investigated the nature of the collaborative process between the teaching intern and his mentor teacher as they collaborated on action (during structured planning time) and in action (while students were present). The teaching internship resided in a seventh-grade mathematics classroom during the teaching of a probability unit from a standards-based curriculum, Connected Mathematics Project. Using existing research, a conceptual framework was developed and multiple data sources (audio taped collaborations, observations of the intern's teaching practices, semi-structured interviews, and a mathematics pedagogy assessment) were analyzed in order to understand the teaching intern's development of knowledge of instructional strategies, knowledge of student understandings, curricular knowledge, and conceptions of purpose for teaching probability.Results identified numerous dilemmas related to planning and implementing instruction. Although the teaching intern developed pedagogical content knowledge, he often experienced difficulty accessing it while teaching. Through collaboration, curriculum, and the classroom context, the teaching intern learned to incorporate his pedagogical content knowledge in instruction. Analysis revealed that as he gained new knowledge he was able to shift his focus from content to the use of instructional strategies for teaching and learning. The curriculum was the primary focus of collaboration and initiated the intern's examination of the learning-to-teach process. Collaboration on action and collaboration in action proved to be essential elements in the development of pedagogical content knowledge.
Finite element analysis of residual stress generation during spot welding and its affect on fatigue behavior of spot welded joints
Authors:   , Long Xin
Published: April 2021

This dissertation presents the finite element based prediction of residual stress generation in a spot welded joint during the spot welding process and the effects of residual stress on fatigue behavior of a spot welded joint. Spot welded advanced high strength steels, namely dual phase DP600 GI and transformation induced plasticity TRIP600 steels were investigated for their fatigue life, microstructure changes and fatigue fracture mechanisms to develop design data for possible application in future light weight and more fuel efficiency automobiles.
Entrepreneurial Leadership in Higher Education: Does the Presidential Career Pathway Make a Difference? - WITHDRAWN
Authors:   , Byrne Phillip Daniel
Published: April 2021

In the United States of America, the role and responsibilities for the University president in many institutions have undergone significant change for the 21st century. As noted by Duderstadt (2006) â€œ[t]he American presidency has more of the character of a chief executive officerâ€ (p. 249). Amey (2006) stated â€œ[l]eaders are key to how organizations function, and there is little doubt that the leaders who are needed to guide postsecondary institutions in tomorrowâ€™s complex environments have to think about their work differently than did their predecessorsâ€ (p. 58). Therefore, the purpose of this study was to gain understanding of two university presidents (one selected through the [traditional] academy career path and the other from the corporate business sector [nontraditional]) through an entrepreneurism lens. The researcher selected a dual case study to focus on discovery rather than hypothesis testing (Merriam, 1998). Data within the study were gathered from interviews, focus groups, and document review providing multiple perspectives by the study participants. The two campus presidents (n=2) were interviewed, along with an additional 19 individuals from the executive or cabinet leadership team. Through analysis, it was determined that three main themes and six sub themes emerged: 1) Sense of Urgency, with subthemes of: a) Leadership, b) Communication; 2) Culture of Higher Education, with subthemes of: a) History and Traditions, b) Environment; and 3) Entrepreneurial Vision, with subthemes of: a) 21st Century Higher Education, b) Institutional Platform and Innovation. Findings from the study indicate the sense of urgency for leadership transcends the higher education institution for the 21st century, and the career pathways for these Presidents did not reflect a difference in how these leaders approached the challenges of a rapidly changing environment. Yet, the president who worked his way up to the presidency through the traditional pathway of the academy appeared to be more hesitant to change the traditions of the academy. Conversely, the president who came up the ranks of business, viewed change as what was needed in the university and if that change did not occur, survival was an issue.