Miracle-dz/UniFAR-FTUs huggingface dataset:
Antiferromagnetism in the Hubbard model on the honeycomb lattice: A two-particle self-consistent study

The semimetal to antiferromagnet quantum phase transition of the Hubbard model on the honeycomb lattice has come to the forefront in the context of the proposal that a semimetal to spin liquid transition can occur before the transition to the antiferromagnetic phase. To study the semimetal to antiferromagnet transition, we generalize the two-particle self-consistent (TPSC) approach to the honeycomb lattice (a structure that can be realized in graphene for example). We show that the critical interaction strength where the transition occurs is $U_c/t=3.79\pm 0.01$ quite close to the value $U_c/t=3.869 \pm 0.013$ reported using large-scale quantum Monte Carlo simulations. This reinforces the conclusion that the semimetal to spin liquid transition is pre-empted by the transition to the antiferromagnet. Since TPSC satisfies the Mermin-Wagner theorem, we find temperature-dependent results for the antiferromagnetic and ferromagnetic correlation lengths as well as the dependence of double occupancy and of the renormalized spin and charge interactions on the bare interaction strength. We also estimate the value of the crossover temperature to the renormalized classical regime as a function of interaction strength.
Distribution of free-living and particle-attached aerobic anoxygenic phototrophic bacteria in marine environments

Aerobic anoxygenic phototrophic (AAP) bacteria are bacteriochlorophyll a-containing prokaryotes which can use both light and organic compounds as energy sources. This functional group is ubiquitous in the euphotic zone of the oceans. Nevertheless, life strategies, distribution pat- terns and physiology of AAP bacteria remain largely unknown. We combined infrared fluorometry, microscopic counts and HPLC pigment analysis to characterize free-living and particle-attached AAP bacterial populations. Using a size-fractionation approach, we found that the size distribution of AAP bacteria and the fraction of particle-attached cells varied greatly among different marine environ- ments. In the open sea environments (Atlantic Ocean, offshore Mediterranean Sea), the main portion of AAP bacterial fluorescence was in the 50% of AAP bacteria were free living. In a coastal lagoon and in the deep chlorophyll a maximum at an offshore Mediterranean station, parti- cle-attached AAP bacteria formed up to half of the AAP bacterial community. The results presented here suggest that AAP bacteria can take on either free-living or particle-attached lifestyles depend- ing on environmental conditions.
NEST-SITE SELECTION AND NEST SURVIVAL OF TWO WOODPECKER SPECIES IN PONDEROSA-PINE DOMINATED FORESTS

Management of woodpecker populations requires knowledge of nesting habitat and vital rates in different forest conditions. We examined nest-site selection and nest survival for two woodpeckers, northern flicker (Colaptes auratus) and hairy woodpecker (Picoides villosus) at three locations in ponderosa-pine forests of the interior Columbia River Basin. Our goals were to: (1) characterize the range of habitat conditions available to nesting woodpeckers in our study area; (2) determine which habitat features best discriminated between nest and non-nest plots, and (3) establish which habitat features most influenced daily nest survival. Northern flickers and hairy woodpeckers were more likely to choose snags than live trees. Both species used larger diameter snags than those available at random. Nest snags tended to be in plots that had higher snag densities and lower live tree densities. For northern flickers, a model of constant daily survival received more support than any model containing habitat covariates. Daily nest survival from the best model for northern flickers was estimated to be 0.55 (95% CI: 0.46-0.64). Increasing live tree density and coarse woody debris volume were included in the most well supported model for hairy woodpeckers. Results from this study did not provide support for the "nest-quality" hypothesis. Nest survival for woodpeckers in this study was low, especially at the Idaho location; we hypothesize that this could be because of differences in predator abundance among the three locations. In ponderosa pine forests that have not been recently disturbed, we recommend maintaining clumps of snags, especially those that contain large snags. Further research is needed to understand the mechanisms that dictate woodpecker nest survival in ponderosa pine forests.
The System Size Distribution for M/G/1 Queueing System under N-Policy with Startup/Closedown

This paper develops a new method for calculating the system size distribution on two different M/G/1 queueing system under N-policy with general startup/closedown. Firstly, the stochastic decomposition property is used to derive the p.g. f. of the system size distribution. By the Leibniz formula of derivation, we investigate the additional system size distribution, and then, we get the recursion expression of system sizes distribution. Finally, several examples are given for illustrating the application of the recursion expression and sensitivity analysis is also performed.
Cash Holdings of EU Firms

Several studies have documented a significant increase in the average cash holdings of U.S. firms since the 1980s. This thesis tries to identify whether this trend is also present in the EU. We utilize a panel dataset of 7250 unique public firms from 25 EU countries, with a total of 73651 firm-year observations. We test the validity of 3 main motives for cash holdings, namely the transaction motive, the precautionary motive, and the agency motive. Furthermore, we explore the existence of time trends in firm cash holdings in our sample, and try to identify which changes in firm characteristics are responsible for them. Our methods are based on previous research by Bates et al. (2009), which utilize a sample of U.S. firms. Our results demonstrate that the average cash ratio of EU firms has increased from 10.9% in 1989 to 13.9% in 2010. This increase is most pronounced in small firms, firms in more risky industries, and non-dividend paying firms. We find that the change in cash ratios can be largely explained by changes in the underlying firm characteristics, and not so much by changes in the relationship between firm characteristics and the cash ratio. Our findings provide support for the precautionary and transaction motives for cash holdings, which tells us that firms hold cash to avoid transaction costs and as a defence mechanism against future cash shortfalls. Although we find some evidence of agency related factors which explain cash holdings, there is not enough evidence to fully accept the agency motive.
Improvement of Ritchie Technique by Identifying the Food That Can Be Consumed Pre-analysis

The objective of this study is to identify foods that cause large sediments, which interfere with Ritchie technique. This technique is used routinely in diagnostic clinical laboratories for detection of intestinal parasites in stool specimens. Foods included in the study were classified into six groups; 1- Vegetables and beans, 2- Fruits, nuts and seeds, 3- Meat, fish and poultry, 4- Grains, 5- Milk and dairy food, 6- Spices and miscellaneous. From each of these groups, several foods were investigated by Ritchie technique. In addition, several volunteers were asked to consume specified food, then stool specimens from those volunteers were examined by Ritchie technique. Most of the studied foods resulted in small sediments and large debris plug. Those foods that formed large amount of sediments were identified and listed according to their food group. A list of these foods can be provided for patients to avoid consumption for 2 days before performing Ritchie technique for detection of intestinal parasites.
Gate Control, Surface Leakage Currents and Peripheral Charging in AlGaN/GaN Heterostructure Field Effect Transistors Having Nanometer-Scale Schottky Gates. Text

Title Gate Control, Surface Leakage Currents and Peripheral Charging in AlGaN/GaN Heterostructure Field Effect Transistors Having Nanometer-Scale Schottky Gates Author(s) Kasai, S. ; Kotani, J.; Hashizume, T. ; Hasegawa, H. Citation Journal of Electronic Materials, 35(4): 568-575 Issue Date 2006-04 Doc URL http://hdl.handle. net/2115/10522 Rights Copyright (c) 2006 The Minerals, Metals & Materials Society (TMS) Type article (author version) Additional Information There are other files related to this item in HUSCAP. Check the above URL. File Information KasaiJEMFinalMan.pdf (Text)
Singular Perturbation of Nonlinear Systems with Regular Singularity

<jats:p>We extend Balser-Kostov method of studying summability properties of a singularly perturbed inhomogeneous linear system with regular singularity at origin to nonlinear systems of the form <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M1"><mml:mi>ε</mml:mi><mml:mi>z</mml:mi><mml:msup><mml:mrow><mml:mi>f</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">′</mml:mi></mml:mrow></mml:msup><mml:mo>=</mml:mo><mml:mi>F</mml:mi><mml:mfenced separators="|"><mml:mrow><mml:mi>ε</mml:mi><mml:mo>,</mml:mo><mml:mi>z</mml:mi><mml:mo>,</mml:mo><mml:mi>f</mml:mi></mml:mrow></mml:mfenced></mml:math> with <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M2"><mml:mrow><mml:mi>F</mml:mi></mml:mrow></mml:math> a <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M3"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">C</mml:mi></mml:mrow><mml:mrow><mml:mi>ν</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>-valued function, holomorphic in a polydisc <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M4"><mml:msub><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mo>-</mml:mo></mml:mover></mml:mrow><mml:mrow><mml:mi>ρ</mml:mi></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msub><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mo>-</mml:mo></mml:mover></mml:mrow><mml:mrow><mml:mi>ρ</mml:mi></mml:mrow></mml:msub><mml:mo>×</mml:mo><mml:msubsup><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mo>-</mml:mo></mml:mover></mml:mrow><mml:mrow><mml:mi>ρ</mml:mi></mml:mrow><mml:mrow><mml:mi>ν</mml:mi></mml:mrow></mml:msubsup></mml:math>. We show that its unique formal solution in power series of <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M5"><mml:mrow><mml:mi>ε</mml:mi></mml:mrow></mml:math>, whose coefficients are holomorphic functions of <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M6"><mml:mrow><mml:mi>z</mml:mi></mml:mrow></mml:math>, is <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M7"><mml:mrow><mml:mn mathvariant="normal">1</mml:mn></mml:mrow></mml:math>-summable under a Siegel-type condition on the eigenvalues of <mml:math xmlns:mml="http://www.w3. org/1998/Math/MathML" id="M8"><mml:msub><mml:mrow><mml:mi>F</mml:mi></mml:mrow><mml:mrow><mml:mi>f</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn mathvariant="normal">0,0</mml:mn><mml:mo>,</mml:mo><mml:mn mathvariant="normal">0</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>. The estimates employed resemble the ones used in KAM theorem. A simple lemma is applied to tame convolutions that appear in the power series expansion of nonlinear equations. Applications to spherical Bessel functions and probability theory are indicated. The proposed summability method has certain advantages as it may be applied as well to (singularly perturbed) nonlinear partial differential equations of evolution type. </jats:p>
PROKARYOTIC DIVERSITY OF HOT SPRINGS IN BALIKESİR AND KÜTAHYA, TURKEY

The prokaryotic diversity of the hot springs Sındırgı, Güre, and Havran in the Balıkesir Province and Eynal in the Kütahya Province, both located in the western part of central Anatolia, was analyzed and compared using cultivation and cultivation-independent methods, including Fluorescence In Situ Hybridization (FISH) and cloning of PCR-amplified fragments of 16S rRNA genes. A total of 66 isolates were obtained from the cultures. They were identified to the species or genus level as Geobacillus, Bacillus, Brevibacillus, Aneurinibacillus, Anoxybacillus, and Aeribacillus. As a result of the FISH study, only bacteria domain signals were received, but arkea domain signals were not. A total of 265 clones from the 16S rRNA gene library were analyzed with Amplified Ribosomal DNA Restriction Analysis. These bacterial clones were identified as the genera Anoxybacillus, Meiothermus, Uncultured bacterium, Aneurinibacillus, Brevibacillus, Bacillus, and Geobacillus. This research highlights the prokaryotic diversity of hot springs in the Balıkesir and Kütahya Provinces.
A Grand Challenge-based Framework for Contextual Learning in Engineering: Impact on Student Outcomes and Motivation

and quantity; designed ﬂuid transport systems to replace water supplies impacted by anthropogenic sources; designed fuel transport and delivery systems; developed designs for commercial and residential development; prepared land use plans; developed designs to protect against potential ﬂood hazards; designed and developed plans and speciﬁcations for ﬂuid handling systems, waste mitigation alternatives and remedial actions for RCRA and CERCLA sites including active industrial facilities and inactive disposal sites (including NPL sites); conducted feasibility studies by evaluating and analyzing the economic and engineering considerations of multiple design alternatives; obtained extensive experience with innovative remedial techniques (including groundwater extraction and treatment, air sparging, soil vapor extraction, and bioventing).
Theoretical and analytical aspects of longitudinal research.

This paper has a three-fold aim: To outline briefly the historical development of ideas that have given rise to the current interest in longitudinal studies particularly in the social sciences; to discuss relevant theoretical considerations when analyzing longitudinal data; and to illustrate approaches toward analyzing longitudinal data when measured as binary and categorical variables. The overall aim is to promote a better understanding of the type of information that longitudinal data provide and of the appropriate techniques needed to analyze such data. (excerpt)
Demand and Taxation ALCOHOL under Monopoly and Oligopoly in South India in the 1970s

Our first objective, is the investigation of the determinants of recorded demand for alcohol, and particularly arrack, in terms of price and income elasticities, taxation and household characteristics. Second, we develop an analysis of some simple theoretical aspects of the revenue system in Karnataka, involving the auction of the monopoly right to sell legally in a district. This leads to an examination of the theory of taxation in spatial and non-spatial oligopoly. Third, we combine these different elements to comment on policy in Karnataka. We hope to demonstrate some techniques and provide insights which can be productively used for a range of important problems in taxation and demand estimation for developing countries.
Keep on Striving: The Impact of Psychosocial Support on Jordanian Adolescents with Cancer

Having cancer during adolescence stage causes stressors in patients’ lives. They are responsible for dealing with many new situations and stressors. Coping with such stressors can be influenced by psychosocial factors. This study aimed to explore the impact of psychosocial support on adolescents with cancer. A qualitative exploratory design was used to understand the experience of psychosocial support from the perspectives of the patients. Twenty adolescents with cancer were selected purposefully from two major cancer treatment centers in Jordan. Semi-structured face-to-face interviews were used to obtain the participants’ perspectives. Data were analyzed using thematic analysis approach. Findings revealed three major themes: “supportive structure”, “precious aspects of psychosocial support”, and “cancer could be defeated”. Participants expressed their satisfaction with the psychosocial support provided to them. However, they asked for further improvement in hospital facilities, playrooms and leisure activities. In conclusion, having a strong psychosocial support system will help adolescents to cope with cancer. Family, friends, and the surrounding environment are the key elements in installing hope and helping adolescents to go through cancer experience. Nurses are advised to adopt these psychosocial keys in order to create age-related activities that would improve the patients’ coping with cancer.
LOCAL HYDRODYNAMICS OF FLOW IN A PULSATING HEAT PIPE: A REVIEW

Global thermal performance modeling of Pulsating Heat Pipes (PHPs) requires local, spatio-temporally coupled, flow and heat transfer information during the characteristic, self-sustained thermally driven oscillating Taylor bubble flow, under different operating conditions. Local hydrodynamic characteristics such as velocities, lengths, shapes and profiles of bubbles and slugs, their dynamic contact angles, thickness of the liquid film that surrounds the bubbles, enhanced mixing/ flow circulation within the liquid slugs and net pressure drop along the flow, etc., are needed to predict local heat transfer and thus, the global thermal performance. In this paper, we systematically review the experimental, theoretical/analytical, and modeling methodologies to predict these hydrodynamic properties in unidirectional two-phase Taylor bubble flows, in the context of Pulsating Heat Pipes. Indeed, there is little literature available for oscillating Taylor bubbles flows. In view of the state-of-the-art, we therefore recommend some directions and perspectives for furthering research on understanding and modeling PHPs.
EFFECT OF SURFACE FUNCTIONAL GROUPS ON WATER VAPOR ADSORPTION OF EUCALYPTUS WOOD-BASED ACTIVATED CARBON

The aim of this study is to modify activated carbon surfaces by oxidizing them with HNO 3 to enhance the adsorption capacity of water vapor. The activated carbons were prepared from eucalyptus wood by CO 2 activation at 600 o C and 900 o C, giving activated carbons with different porous properties. The results from Boehm titration showed that the amount of acidic oxygen functional groups increased after oxidation with HNO 3 for both activated carbons, with activated carbon prepared at 900 o C giving the higher amount of acidic oxygen functional groups. The activated carbon originally prepared at 900 o C gave higher amounts of water adsorbed than the carbon prepared at 600 o C because of its larger pore volume and surface area. The adsorption capacity of water vapor was found to increase after oxidation for both activated carbon samples. Water isotherms were also analyzed using the cluster model of Dubinin-Serpinski (DS) and Do and Do. The results indicated that water isotherms obtained from the original and oxidized activated carbons prepared at 600
Analyzing Factors Impacting Students ’ Choice between Low-Cost and Full-Fare Airlines

2 TABLE OF CONTENTS.3 LIST OF FIGURES.4 LIST OF TABLES.4 INTRODUCTION.5 CHAPTER 1 CONSUMER BEHAVIOR IN TRAVEL INDUSTRY.7 1.1. Factors Influencing Choice of Different Travel Products 8 1.2. Factors Influencing Choice of Air Carrier 10 1.3. Student as a Travel Product Consumer 22 CHAPTER 2 RESEARCH FRAMEWORK OUTLINE.23 2.1. Low-cost vs. Full-fare 23 2.2. Choice of Factors 24
3PL Implementing Corporate Social Responsibility in A Closed-loop Supply Chain : A Conceptual Approach

The responsibility of todays's reputable company are not only financial, but also corporate social responsibility(CSR). With regards to the environmental aspect, the public expects green logistics solutions. This paper focuses on how a third party logistics provider(3PL) might provide green logisticsservices through actions that foster sustainability. The methodology used is an in-depth interviewing approach, which described green logistics through the key drivers using depth interviews. An existing conceptual model is used to support our concepts and ideas. Finally, we discuss out the key factors from respondent regarding how to maintain sustainability through action, from 3PL's perspective. We also discuss the benefits and challenges to green logistics in future.
The Role of Board Chair in the Relationship between Board Human Capital and Firm Performance

This study aims to investigate the moderating effect of the board chair's role on the relationship between board human capital and firm performance. Board human capital has been regarded as a valuable asset that enhances firm performance. Especially, the board chair plays a crucial role in developing this high-echelon human capital. This study utilises a set of longitudinal data to examine 275 firms in Taiwan. The result indicates that board human capital is positively related to firm performance, and the individual human capital of the board chair represents a moderating effect on the relationship between board human capital and performance.
Coffee Market Liberalisation and the Implications for Producers in Brazil, Guatemala and India

The standard approach to modelling the relationship between world and producer prices of coffee does not incorporate the effects of changing government policies and market structures. These changes have led to large structural breaks in the relationship between the prices implying the standard estimates are biased. We model coffee prices in Brazil, Guatemala and India allowing for the structural breaks and show that the liberalisation of coffee markets has benefited producers substantially both in terms of a higher share of the world price of coffee and higher real prices. This suggests that calls to re-regulate coffee markets may be misplaced. Copyright 2012, Oxford University Press.
Exploring Customer Loyalty Following Service Recovery

Existing research shows that loyalty is a function of customer perceptions of trust following service recovery. The authors propose a cognitive appraisal model that portrays trust and emotions as key mediators in the relationship between perceived justice and customer loyalty. A structural equation model was used to test the conceptual model. The findings support the conjecture that emotions and trust have important mediating roles during the service recovery process. Furthermore, while existing research has focused primarily on negative emotion, the authors' model adopts a two-dimensional view of emotion (positive and negative emotions), and the results support the inclusion of both dimensions. Overall, the empirical support for the proposed model has important managerial implications for effective relationship management. By understanding the important mediating roles of trust and emotion, service employees can deliver more effective service recovery strategies and thereby enhance customer loyalty.