bluuebunny/crossref_metadata_2025_split huggingface dataset:
Determination of synchronous generator nonlinear model parameters based on power rejection tests using a gradient optimization algorithm
Authors: Boboń A. , Nocoń A. , Paszek S. , Pruski P. 
Published: August 2017

AbstractThe paper presents a method for determining electromagnetic parameters of different synchronous generator models based on dynamic waveforms measured at power rejection. Such a test can be performed safely under normal operating conditions of a generator working in a power plant. A generator model was investigated, expressed by reactances and time constants of steady, transient, and subtransient state in the d and q axes, as well as the circuit models (type (3,3) and (2,2)) expressed by resistances and inductances of stator, excitation, and equivalent rotor damping circuits windings. All these models approximately take into account the influence of magnetic core saturation. The least squares method was used for parameter estimation. There was minimized the objective function defined as the mean square error between the measured waveforms and the waveforms calculated based on the mathematical models. A method of determining the initial values of those state variables which also depend on the searched parameters is presented. To minimize the objective function, a gradient optimization algorithm finding local minima for a selected starting point was used. To get closer to the global minimum, calculations were repeated many times, taking into account the inequality constraints for the searched parameters. The paper presents the parameter estimation results and a comparison of the waveforms measured and calculated based on the final parameters for 200 MW and 50 MW turbogenerators.
Optimization of Wireless Transceivers under Processing Energy Constraints
Authors: Wang Gaojian , Ascheid Gerd , Wang Yanlu , Hanay Oner , Negra Renato , Herrmann Matthias , Wehn Norbert 
Published: August 2017

Abstract
Focus of the article is on achieving maximum data rates under a processing energy constraint. For a given amount of processing energy per information bit, the overall power consumption increases with the data rate. When targeting data rates beyond 100 Gb/s, the system’s overall power consumption soon exceeds the power which can be dissipated without forced cooling. To achieve a maximum data rate under this power constraint, the processing energy per information bit must be minimized. Therefore, in this article, suitable processing efficient transmission schemes together with energy efficient architectures and their implementations are investigated in a true cross-layer approach. Target use cases are short range wireless transmitters working at carrier frequencies around 60 GHz and bandwidths between 1 GHz and 10 GHz.
On-Chip Integrated Distributed Amplifier and Antenna Systems in SiGe BiCMOS for Transceivers with Ultra-Large Bandwidth
Authors: Valerio Testa Paolo , Klein Bernhard , Hahnel Ronny , Plettemeier Dirk , Carta Corrado , Ellinger Frank 
Published: August 2017

Abstract
This paper presents an overview of the research work currently being performed within the frame of project DAAB and its successor DAAB-TX towards the integration of ultra-wideband transceivers operating at mm-wave frequencies and capable of data rates up to 100 Gbits

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. Two basic system architectures are being considered: integrating a broadband antenna with a distributed amplifier and integrate antennas centered at adjacent frequencies with broadband active combiners or dividers. The paper discusses in detail the design of such systems and their components, from the distributed amplifiers and combiners, to the broadband silicon antennas and their single-chip integration. All components are designed for fabrication in a commercially available SiGe:C BiCMOS technology. The presented results represent the state of the art in their respective areas: 170 GHz is the highest reported bandwidth for distributed amplifiers integrated in Silicon; 89 GHz is the widest reported bandwidth for integrated-system antennas; the simulated performance of the two antenna integrated receiver spans 105 GHz centered at 148GHz, which would improve the state of the art by a factor in excess of 4 even against III-V implementations, if confirmed by measurements.
Big Data and Data Science: Opportunities and Challenges of iSchools
Authors: Song Il-Yeol , Zhu Yongjun 
Published: August 2017

Abstract
Due to the recent explosion of big data, our society has been rapidly going through digital transformation and entering a new world with numerous eye-opening developments. These new trends impact the society and future jobs, and thus student careers. At the heart of this digital transformation is data science, the discipline that makes sense of big data. With many rapidly emerging digital challenges ahead of us, this article discusses perspectives on iSchools’ opportunities and suggestions in data science education. We argue that iSchools should empower their students with “information computing” disciplines, which we define as the ability to solve problems and create values, information, and knowledge using tools in application domains. As specific approaches to enforcing information computing disciplines in data science education, we suggest the three foci of user-based, tool-based, and application-based. These three foci will serve to differentiate the data science education of iSchools from that of computer science or business schools. We present a layered Data Science Education Framework (DSEF) with building blocks that include the three pillars of data science (people, technology, and data), computational thinking, data-driven paradigms, and data science lifecycles. Data science courses built on the top of this framework should thus be executed with user-based, tool-based, and application-based approaches. This framework will help our students think about data science problems from the big picture perspective and foster appropriate problem-solving skills in conjunction with broad perspectives of data science lifecycles. We hope the DSEF discussed in this article will help fellow iSchools in their design of new data science curricula.
Opportunities and Challenges in Sustainability of Vertical Farming: A Review
Authors: Kalantari Fatemeh , Tahir Osman Mohd , Joni Raheleh Akbari , Fatemi Ezaz 
Published: August 2017

Abstract
As the world population continues to grow at a rapid rate, accompanied by a substantial growth in food demand which is expected to transpire in the next 50 years, 80 % of the population will be living in urban areas. In order to feed this growing population, there is a need for sustainable urban food. Producing sustainable urban food requires considering all factors of sustainability collectively including, environmental, social and economic advancement. A new method that has been proposed to address the issue of sustainability and to meet the growing food demand is, designing and implementing vertical farms. Vertical farming is a concept that involves cultivating plants with livestock on vertically inclined surfaces such as in skyscrapers in urban areas, where there is a lack of available land and space. However, there is a paucity of information and a limited number of published critical reviews on Vertical farming in urban areas. This study, in an attempt to review the major opportunities and challenges of Vertical Farming, uses the framework of sustainability to examine the role of it in prospective food provision in cities. This study is a critical review of 60 documents from related published papers from relevant journals and scientific online databases. Vertical Farming can be potentially beneficial in increasing food production, maintaining high quality and safety and contributing to sustainable urban farming. Well-known advantages of growing food within the urban territory can be beneficial environmentally, socially and economically. Vertical farms can also provide solutions for increasing food security worldwide.
Association Between Oxidative Stress and Melanoma Progression
Authors: Bisevac Jelena Pantic , Djukic Mirjana , Stanojevic Ivan , Stevanovic Ivana , Mijuskovic Zeljko , Djuric Ana , Gobeljic Borko , Banovic Tatjana , Vojvodic Danilo 
Published: August 2017

SummaryBackground: Overproduction of free radicals accompanied with their insufficient removal/neutralization by antioxidative defense system impairs redox hemostasis in living organisms. Oxidative stress has been shown to be involved in all the stages of carcinogenesis and malignant melanocyte transformation. The aim of this study was to examine association between oxidative stress development and different stages of melanoma. Methods: The measured oxidative stress parameters included: superoxide anion radical, total and manganese superoxide dismutase, catalase and malondialdehyde. Oxidative stress parameters were measured spectrophotometrically in serum samples from melanoma patients (n=72) and healthy control subjects (n=30). Patients were classified according to AJCC clinical stage. Results: Average superoxide anion and malondialdehyde concentrations were significantly higher in melanoma patients than in control group, with the highest value of superoxide anion in stage III, while malondialdehyde highest value was in stage IV. The activity of total and manganese superoxide dismutase was insignificantly higher in melanoma patients than in control group, while catalase activity was significantly higher. The highest activity of total activity of manganese superoxide dismutase was in stage IV. Catalase activity was increasing with the disease progression achieving the maximum in stage III. Conclusion: Results of our study suggest that melanoma is oxidative stress associated disease, as well as deteriorated cell functioning at mitochondrial level.
m-Convexity and Functional Equations
Authors: Lara Teodoro , Quintero Roy , Rosales Edgar 
Published: August 2017

AbstractIn this research we aim to explore some properties of m-convex functions from the point of view of functional equations or better, functional inequalities. So far studies of m- convexity have been devoted mainly to establish properties, inequalities and examples on the topic, but not to look at the problem from the perspective of functional inequalities.
Profitability and efficiency evaluation of the financial management of a socio-economic intervention
Authors: Garcia Rosario Cano 
Published: August 2017

Abstract
The role of small businesses is critical in the growth of an economy, and in certain circumstances these necessitate financial aid for their sustainability. The main objective of the study is to evaluate the profitability and efficiency of the financial management of the intervention for the improvement of the socio-economic condition of the small businesses in Santol, La Union, Philippines. The article specifically addressed the functionality of the financial aid relative to the actions taken by the beneficiaries for their small businesses, the profitability and efficiency of financial management condition of the small businesses, and the impact on the socio-economic condition of the small business beneficiaries. The study utilized the descriptive type of research mixing qualitative and quantitative analysis by applying financial ratios. It covered the small businesses from three associations and their 127 members. It was found that the association-beneficiaries deposited the money in a bank before the loaning services. The small businesses became profitable and efficient in utilizing the financial aid. The overall socio-economic impact is good as reflected in the results of their financial management. The small businesses of the associations were able to continue operating and provided loaning services to their needy members. It is concluded that with close monitoring and evaluation, small businesses that were granted financial aid are profitable and efficient in their financial operations. It is then recommended that monitoring and evaluation as well as the provision of interventions for the small businesses be sustained to ensure contribution of small businesses to the economic growth of the society.
A Study of the Third Space, Hybridity, and Colonial Mimicry in Athol Fugard’s My Children! My Africa!
Authors: Ghasemi Parvin , Sasani Samira , Nemati Fatereh 
Published: August 2017

Abstract
South Africa, like many other Eastern countries, was a victim of the brutal phenomenon called colonialism. Its people suffered a lot but did not give up protesting against it. Literature was often used as a means to demonstrate the problems and realities of the society. Therefore, the literary texts can be considered an effective weapon in this battle. One of these influential people is Harold Athol Lanigan Fugard who is known for his anti-apartheid plays. This article scrutinizes the relation between the colonizer and the colonized in Athol Fugard’s My Children! My Africa! based on Homi Bhabha’s ideas. According to him, the relation between the whites and the blacks becomes reciprocal in the third space of enunciation. Despite their differences, they try to live peacefully. The mimicry strategy is employed by the colonized to prevent total resemblance. They are dependent on each other notwithstanding their opposition, and both are aware of this, which makes them stick together.
Evaluation of Seed Nut Size as Index of Selection for Superior Seed Quality Attributes in Two Biotypes of Cashew (Anacardium occidentale)
Authors: Kehinde T. O. , Adebisi M. A. , Alegiledoye A. O. , Ajani O. O. , Shofuyi K. A. 
Published: August 2017

Abstract
Quality seed nuts are germane to propagation of the cashew plant. Seed nut fraction and genotypes have been identified to influence seed quality of crop plant. Unexpectedly, seed size effect has not been well documented in Brazilian and local biotypes of cashew grown in Nigeria. An experiment was initiated to investigate the effect of three nut sizes and two biotypes of cashew on seed quality (physical and physiological) traits. Seed nut were collected from three cashew plants of the same age of each of the biotypes and were allowed to stay for 60 days after collection. The experiment was carried out in a factorial arrangement laid out in a completely randomized design with three replicates using two factors (nut size and biotypes) in 2011 cropping season in both laboratory and screen house tests. Data were collected on physical characters such as seed length, seed width, 100 seed weight and seed imbibition rate while physiological characters were seed germination and early vigour traits. Data obtained were analysed statistically using Tukey HSD test at 5% probability level. The result revealed that some of the characters were significantly different from one another. Seed nut fraction and biotype had considerable effect on seed length, seed width, seed imbibition rate and 100 seed weight. The two factors (nut size and biotype) interaction had profound effect on seed width only. On seed physiological quality, biotype effect was significant on seedling fresh and dry weights and seedling growth rate whereas seed nut size had considerable effect on seed germination, seedling vigour index, seedling fresh weight and seedling growth rate. The interaction effect of nut size and biotype recorded significant effect on the above four characters. Brazilian biotype had superior physical characters (seed length, width and weight) but with low imbibitions rate while medium and large nut sizes gave the highest seed germination and seedling vigour. Also, medium and large nuts had the highest seedling fresh weight whereas the highest seedling growth rate was recorded with small size seed. However, large, medium and small nut sizes of local biotype had the highest imbibition rate, whereas small, medium and large nut size of Brazilian biotype gave the highest 100 seed weight. On seedling emergence, large nuts of local biotype recorded the highest seedling emergence and seedling vigour index. Medium nuts of the two biotypes of cashew are recommended for cashew seed multiplication. Further research on physiology of cashew nut sizes during storage and osmo and hydro priming treatment effect are necessary and therefore advocated.
Structural Equation Model as a Tool to Assess the Relationship Between Grain Yield Per Plant and Yield Components in Doubled Haploid Spring Barley Lines (Hordeum vulgare L.)
Authors: Mańkowski Dariusz R. , Kozdój Janusz , Janaszek-Mańkowska Monika 
Published: August 2017

Abstract
The aim of this study was to describe and characterize the relationships between yielding factors and grain yield per doubled haploid (DH) plant of spring barley as well as relation between yield components and duration of each stage of plant development. To describe these relations structure equation modeling was used. The study included plants of doubled haploid spring barley lines (Hordeum vulgare L.) derived from two-rowed form of Scarlett cultivar. The SAS® system was used to analyze the model of relationships between grain yield per plant and yield components. Our results indicate that the number of spikes per plant and grain yield per spike had a direct and decisive influence on the grain yield of the investigated DH plants of spring barley. Based on the path model analysis it was found that the most important factor determining grain yield per DH plants of spring barley was the number of spikes per plant and the duration of tillering and shooting stages.
Germination and Biochemical Responses to Alkalinity Stress in Two Sesame Cultivars
Authors: Mahdavi Batool 
Published: August 2017

Abstract
In this study, the effect of different alkaline concentrations (0, 10, 20, 30, 40, 50, 60 mM) on germination and biochemical characteristics of the two sesame (Sesamum indicum L.) cultivares (Dashtestan and GL-13) which are registered cultivars of Iran were investigated. The experiment was carried out in a completely randomized design with three replications. Results showed that, germination percentage, germination rate, shoot length and dry weight, root length and dry weight and K+ content decreased, whereas, malondialdehyde (MDA), proline, total soluble sugars and Na+ contents increased with increasing alkalinity stress. GL-13 cultivar had the least root and shoot length, proline and K+ content than Dashtestan.
The Genesis of Arabic Logical Activities: From Syriac Rhetoric and Jewish Hermeneutics to āl-Šāfi‘y’s Logical Techniques
Authors: Azazy Hany 
Published: August 2017

AbstractThis paper tries to outline a history of development of informal logic in Semitic languages and especially in Arabic. It tries to explain how the first definite formulation of rules of this logic appeared at āl-Šāfi‘y’s Risāla, a work on ’uswl āl-fiqhor methodology of law. It attempts also to provide new theories and hypotheses about the translation movement in the Arabic and Islamic medieval world.
Impact of recreation and tourism on selected soil characteristics in the Lisia Góra Nature Reserve area (south-east Poland)
Authors: Makuch-Pietraś Iwona , Pięta Natalia , Pieniążek Marcin 
Published: August 2017

Abstract
The aim of the research was to estimate changes in soil properties caused by intensive recreation and tourism in protected areas within the urban borders of Rzeszów (south-east Poland). The research was conducted on two objects: (1) on protected areas of the Lisia Góra Nature Reserve and (2) along the Wisłok Valley. The difference in anthropopressure between the areas was taken into consideration. Soil penetration resistance and moisture were analysed in the spring and autumn period. Soil texture, pH, total carbon, and electrical conductivity (EC) in a 1:10 soil:water suspension were measured in soil material collected in spring. The ion content (Ca2+, Mg2+, K+, Na+) was measured in the same suspension with an ion chromatograph. There were significant correlations (determined by the Pearson coefficient) between soil acidity, EC, total exchangeable bases, ions of calcium and magnesium, and soil penetration resistance. A significant difference was found in soil penetration resistance between objects (higher in the Wisłok Valley area) and between the distances from the border of the intensively managed area (a decrease as the distance increased). The Z coefficient (the ratio of sodium ions, the sum of calcium and magnesium ions) was significantly lower for the the Lisia Góra Nature Reserve sites.
Reproductive Ecology of Acanthus ilicifolius L., a Non-Viviparous Mangrove Associate in Coringa Mangrove Forest, Andhra Pradesh (India)
Authors: Aluri Jacob Solomon Raju , Bethapudi Rajesh , Chappidi Prasada Rao 
Published: August 2017

Abstract

Acanthus ilicifolius L. (Acanthaceae) is an evergreen non-viviparous mangrove associate. It is hermaphroditic, strongly protandrous, self-compatible, facultative xenogamous, temporally dioecious and melittophilous. The floral mechanism is highly specialized and adapted for pollination by large-bodied bees. The natural fruit set is below 30%. The fruits mature within a month and usually contain four seeds. The fruit is a capsule and splits explosively in the dorsi-ventral plane ejecting the seeds away. This makes it anemochorous. The gregarious occurrence of the plant at the study site is attributed to propagation by seed and vegetative modes.
Does a 1-Year Age Gap Modify the Influence of Age, Maturation, and Anthropometric Parameters as Determinants of Performance Among Youth Elite Soccer Players?
Authors: Bidaurrazaga-Letona Iraia , Lekue José A. , Amado Markos , Gil Susana M. 
Published: August 2017

Abstract
Bidaurrazaga-Letona, I, Lekue, JA, Amado, M, and Gil, SM. Does a 1-year age gap modify the influence of age, maturation, and anthropometric parameters as determinants of performance among youth elite soccer players? J Strength Cond Res 33(9): 2541–2547, 2019—Because age-groups in soccer often comprise children born within a 2-year time frame, characteristics that define the profile of a successful player may not be appropriate for the oldest or youngest players of the same age-group. Therefore, this study aimed to determine to what extent performance was influenced by age, maturation, and body size in elite soccer players with barely 1-year age gap. Anthropometry, 15-m sprint test, modified Barrow's agility test, Yo-Yo intermittent recovery test level 1, countermovement jump, and handgrip test were conducted in players aged 12 years and under (n = 82; age, 11.1 ± 0.6 years) and between 12 and 13 years (n = 79; age, 12.8 ± 0.6 years). A total score of performance, chronological age, and age at peak height velocity were calculated. Descriptive statistics, Student's t-tests, and multiple linear regressions were performed. The explained variance in composite score was greater in the older (54%) than in the younger (30%) players. Sum of skinfolds was the primary predictor of 15-m sprint and countermovement jump in the younger group, whereas in the older group, chronological age and body size appeared as predictors of performance (41%). Body size explained the variance in most tests in older players. In the younger group, biological maturity status explained the variance in endurance (35%) and handgrip (59%) tests. In summary, chronological age and sum of skinfolds influenced the most tests; however, predictors differed between age groups. These findings highlight the importance of assessing individual differences in young male soccer players regardless of their similarity in age.