bluuebunny/crossref_metadata_2025 huggingface dataset:
Composite materials for the restoration of historical monuments made of soapstone (steatite): a statistical approach
Authors: Panzera Tulio Hallak
Published: July 2019

Currently many works of art made of soapstone and recognized as cultural patrimony of humanity are in an advanced stage of degradation. Hence, it is necessary to interrupt this process and recover the deteriorated parts. Composite materials consisted of steatite particles and epoxy polymer are designed and characterised for their application in the repair of sculptures made of soapstone. The material applied in restorations should provide coloration and texture similar to soapstone besides structural requirements. The degree of similarity of the artificial material to the rock is enhanced by the proper selection of the particle size range and the increase of steatite incorporation in the composites. A statistical methodology based on the mixture design is used to optimize the relative amount of three particle size fractions of steatite particles in order to maximise the proportion of the dispersed phase in the composites. The maximum particle packing density (1.50 g/cm³) is obtained for a ternary mixture, composed of 62% of coarse particles (1.18 mm - 0.60 mm), 6% of medium sized particles (0.60 mm - 0.30 mm) and 32% of fine particles (0.30 mm - 0.15 mm). In this manner, the fabrication of composites based on an epoxy polymer matrix with 70wt% of incorporated steatite particles has been possible, increasing the maximum amount by 10% as used in previous works.
The Impact of Immigration Enforcement on the Nation’s Schools
Authors: Ee Jongyeon , Gándara Patricia
Published: July 2019

In response to growing concerns about the impact of harsh immigration enforcement policy since the 2016 presidential campaign, we examined its overall impact on the nation’s schools, using survey data completed by over 3,600 educators across the country. Our study results show that immigration enforcement is affecting all students—both those from immigrant homes and those that are not. In particular, Title I schools are the most affected by immigration enforcement. Our results also show that the higher the percentage of White students, the more educators reported immigrant students being exposed to a hostile, anti-immigrant environment. We conclude that the current policy of immigration enforcement significantly dismantles an equitable education for all students and creates a critical threat to their futures.
Model for cascading failures in functional networks: application to epileptic patients with generalized tonic-clonic seizures
Authors: Ke Ming , Cao Li , Liu Guangyao
Published: July 2019

The dynamic process of epilepsy is modeled as a cascading failure model in functional networks derived from graph theory. The aim is to test whether cascading failure identified from functional magnetic resonance imaging data could simulate epileptic discharges in 18 subjects with generalized tonic-clonic seizure and 17 demographically matched healthy controls. A cascading failure model was used to simulate the neural networks underlying generalized tonic-clonic seizure and healthy controls by stimulation of the node with the greatest number of connections. Results showed that the efficiency of generalized tonic-clonic seizure dropped significantly when compared to controls. Particular nodes whose efficiency altered significantly showed a correlation with the symptoms of generalized tonic-clonic seizure. Results also indicated that the left middle frontal lobe may be a potential focal area in the initiation of generalized tonic-clonic seizure.
Electrophysiological modulation and cognitive-verbal enhancement by multi-session Broca's stimulation: a quantitative EEG transcranial direct current stimulation based investigation
Authors: Saadi Zahra Kheradmand , Saadat Mahboobeh , Kamali Ali-Mohammad , Yahyavi Seyedeh-Saeedeh , Nami Mohammad
Published: July 2019

To evaluate transcranial direct current stimulation-induced changes in resting state quantitative EEG and cognitive-verbal performance of second language learners, 16 healthy individuals were randomly recruited to sham and real transcranial direct current stimulation groups receiving eight sessions of second language instruction accompanied by a 2 mA transcranial direct current stimulation over Broca's area with the cathode placed over the left arm. Quantitative EEG was recorded during the resting state after the stimulation session and second language instruction. Reduced theta activity at Fp1, F7, F3, and T5 caused by the stimulus current was reported. Multisession stimulation resulted in a significant increase in current density for beta power (25 Hz) in the language network. Cognitive-verbal pre-post stimulation performances suggest that anodal vs. sham transcranial direct current stimulation significantly improved the subjects test score on digit span, a cognitive-verbal ability. It is concluded that transcranial direct current stimulation of Broca's area increase cognitive-verbal performance by modulating brain electrical activity in language-related regions.
Neuroacanthocytosis: a case report of chorea-acanthocytosis
Authors: Xiang Yuanyuan , Li Shan , Liu Xiaohui , Li Jifeng, , Sun Qinjian, , Chen Yan, , Du Yifeng , Wu Junwei
Published: July 2019

Neuroacanthocytosis is a rare progressive neurodegenerative disease, including chorea-acanthocytosis, McLeod syndrome, Huntington’s disease-like 2, and pantothenate kinase-associated neurodegeneration, where chorea-acanthocytosis occupies the main entity of this disease group. Here, a classic case of chorea-acanthocytosis is reported that exhibited gradually deteriorating abnormal movements of limbs and face, swallowing difficulty, and lip and cheek biting for the past two years. Peripheral blood smears revealed that 35% of the red blood cells were acanthocytes and electron microcopy scans clearly showed the morphology of acanthocytes. VPS13A gene sequencing found a heterozygous novel VPS13A gene mutation (c.80dupT). Brain magnetic resonance imaging scans showed moderate anterior horn dilation of lateral ventricles and bilateral atrophy of the head of caudate nucleus. Several suggestive features are summarized to provide diagnostic clues for chorea-acanthocytosis and facilitate future diagnosis and treatment.
Channel selection in motor imaginary-based brain-computer interfaces: a particle swarm optimization algorithm
Authors: Zhang Lei , Wei Qingguo
Published: July 2019

The number of electrode channels in a brain-computer interface affects not only its classification performance, but also its convenience in practical applications. However, an effective method for determining the number of channels has not yet been established for motor imagery-based brain-computer interfaces. This paper proposes a novel evolutionary search algorithm, binary quantum-behaved particle swarm optimization, for channel selection, which is implemented in a wrapping manner, coupling common spatial pattern for feature extraction, and support vector machine for classification. The fitness function of binary quantum-behaved particle swarm optimization is defined as the weighted sum of classification error rate and relative number of channels. The classification performance of the binary quantum-behaved particle swarm optimization-based common spatial pattern was evaluated on an electroencephalograph data set and an electrocorticography data set. It was subsequently compared with that of other three common spatial pattern methods: using the channels selected by binary particle swarm optimization, all channels in raw data sets, and channels selected manually. Experimental results showed that the proposed binary quantum-behaved particle swarm optimization-based common spatial pattern method outperformed the other three common spatial pattern methods, significantly decreasing the classification error rate and number of channels, as compared to the common spatial pattern method using whole channels in raw data sets. The proposed method can significantly improve the practicability and convenience of a motor imagery-based brain-computer interface system.
ANALISIS NOVEL LASKAR PELANGI KARYA ANDREA HIRATA
Authors: antoardi
Published: July 2019

Tujuan penelitian ini adalah untuk mendeskripsikan Penelitian sosiologi sastra (1)masalah-masalah sosial (2) kemiskinan,(3)pengangguran,(4)kriminalitas dalam novel LASKAR PELANGI Karya Andrea Hirata. jenis penelitian yang digunakan pada penelitian ini adalah kualitatif, karena jenis penelitian ini penelitian tentang riset yang bersifat deskriptif dan cenderung menggunakan analis. Proses dan makna lebih ditonjolkan dalam penelitian kualitatif. Landasan teori dimanfaatkan sebagai pemandu agar fokus penelitian sesuai dengan fakta dilapangan.Teknik pengumpulan data yang dilakukan dengan membaca berulang-ulang novel Laskar Pelangi karya Andrea hirata dengan membaca secara lambat karena ingin mendapatkan pemahaman yang kuat dari setiap kata dari kalimat yang disajikan dalam novel Lakar pelangi karya Andrea hirata,menandai stabillo pada kata atau kalimat yang penting, pengumpulan data yang dilakukan melalui studi pustaka mencari referensi yang berhubungan dengan masalah sosial, Teknik analisis data menggunakan teori Abrams, Kesimpulan berdasarkan hasil alisis data dapat disimpulkan sebagai berikut: Masalah sosial (1) Kemiskinan (2) pengangguran (kriminalitas) Masalah sosial suatu ketidaksesuaian antarara unsur-unsur kebudayaan atau masyarakat yang membahayakan kehidupan kelompok sosial.Kata Kunci : Masalah Sosial, Novel, Laskar Pelangi
Distinctiveness as a Marker of Identity Formation
Authors: van Doeselaar Lotte , Klimstra Theo , Denissen Jaap J. A. , Meeus Wim
Published: July 2019

Individual distinctiveness is theorized to characterize an adaptive identity, but its importance remained underexplored. In two studies, we investigated the nomological networks of two common conceptualizations of distinctiveness: general and comparative distinctiveness. We compared these to the network of identity formation’s best-validated marker: commitment. Findings from two samples of young adults living in the Netherlands (n = 320) and in the US (n = 246) both revealed that general distinctiveness marked adaptive identity formation and greater psychosocial well-being. Moreover, general distinctiveness had unique predictive value over commitment strength. Comparative distinctiveness from important others uniquely indicated lowered social well-being. Our findings illustrate that careful attention should be paid to the conceptualization of distinctiveness, because distinctiveness is an important but complex concept.
The Effect of the 5Es Model on EFL Female Students’ Motivation and Achievement at Taif University
Authors: Alorabi Shatha Abdullah Obaidullah
Published: July 2019

Since English has become the business language of the world and of the Internet in recent years, most education systems have emphasized its importance. However, in Saudi Arabia, students have difficulties learning English, especially those taught with traditional teacher-centered methods. In contrast, in the constructivist and cooperative learning methods, textbooks and teachers are no longer the only sources of information; their primary task is facilitating interaction among students and connecting students’ prior knowledge with new information. The present study investigates the effects of using the 5Es teaching model on EFL female students’ motivation and achievement at Taif University. Likewise, it may contribute to the literature on the 5Es model with EFL students’ motivation and achievement. The sample included 119 female Saudi undergraduate students studying English as a foreign language (EFL) at the first level at Taif University, in Saudi Arabia. They study English language with a focus on reading, writing, listening and speaking, for 6 hours weekly over one academic semester. The sample was divided into a control group (n = 61) and an experimental group (n = 58). Two research questions were addressed to examine whether: (1) there are significant differences between the experimental group scores and the control group scores on post-tests of the EFL female Saudi students’ motivation and their achievement and (2) there are significant differences between the mean scores of the pre-test and post-tests of the students’ motivation and their achievement for the experimental group. The researcher designed a program incorporating the 5Es model of teaching and learning which was used with the experimental group for ten weeks in 20 sessions. The 5Es model program provides the basis for learners to construct an accurate understanding of a new concept based on existing knowledge. In contrast, the researcher used traditional instruction with the control group for the same period. Besides the 5Es program, the two groups were asked to answer questions on a 5-point Likert-scale motivation questionnaire before and after the instruction to compare changes on students’ motivation. The following statistics calculations were performed: t-test, mean, SD, and Pearson coefficient correlations to analyze the data. The results showed that there are significant differences between the mean scores of the experimental and control groups on the post-tests of the EFL female Saudi students’ motivation and their achievement in favor of the experimental group. Moreover, statistically significant differences were found in the mean scores of the pre-test and post-tests of the students’ motivation and their achievement for the experimental group, in favor of post-test.
Phytochemical Characterization and High In Vitro Antioxidant Properties ofHammada elegansAlgerian Extracts: a Potent Medicinal Plant
Authors: Labioth S. , Mahfoudi R. , Djeridane A. , Benlhorma S. , Yousfi M.
Published: July 2019

The phytochemical screening of flowers and rest aerial parts (without flowers) of localHammada elegansBotsch., performed for the first time, revealed the presence of saponins, alkaloids, flavonoids, catechin and gallic tannins, sterols and triterpenes, cardiac glycosides, and C-glycosides. However, the combined anthracene and coumarins are present only in the air rest aerial parts. Qualitative analysis of extracts by TLC confirmed the presence of these compounds in both parts ofHammada elegans. The total phenolic content was widely variable and depends on extraction solvents. The crude methanolic extract of flowers presented the highest content (2.66 ± 0.02 mg GAE/g). The in vitro antioxidant capacity ofHammada elegansextracts was assessed by DPPH, CUPRAC, iron chelating, and xanthine oxidase inhibitory assays. The DPPH assay showed an important antiradical activity of the diethyletheric fraction of the rest aerial part (EC50 = 0.46 ± 0.05 mg/ml) compared to other extracts. However, in the CUPRAC assay, the diethyletheric extract of flowers part has an interesting ability (EC50 = 2.67 ± 0.00 mg/ml) comparatively to the other extracts, but lower than those of ascorbic acid and TBHQ. The results of the chelating effect on ferrous ions show clearly that diethyletheric and acetonic extracts of both plant parts have greater chelating powers than that of the positive control. Finally, diethyletheric extract of oth parts ofHammada elegansproved to be the most active in the inhibition of xanthine oxidase activity.
Gleichstellungsorientierte Hochschulentwicklung vor dem Orientierungsrahmen einer geschlechtsneutralen Universität
Authors: Glöckner Mary , Lempp Theresa , Fischer Nadine , Krzywinski Nora , Tampe Katharina , Zimmermann Hannah
Published: July 2019

Der Beitrag fokussiert kollektive Geschlechterwissensbestände an einer deutschen Universität, die fortbestehende Geschlechterungleichheiten legitimieren und sich als ein Nebeneinander von widersprüchlichen Deutungsmustern beschreiben lassen. Daraus leiten sich Distanzierungen und Vorbehalte gegenüber Gleichstellungsarbeit ab, die eine gleichstellungsorientierte Organisationsentwicklung behindern können. Basis des Artikels bilden Gruppendiskussionen mit Hochschulangehörigen verschiedener Statusgruppen, welche nach der Dokumentarischen Methode (Bohnsack, 2000) ausgewertet wurden.
Analysis of core loss of three-phase induction motors equipped with concentric single-double layer star-delta winding
Authors: Li Zechen , Bao Xiaohua , Ni Youyuan , Cheng Shuai , Liu Jiwei
Published: July 2019

Although star-delta winding can improve the efficiency of motors because of a higher fundamental winding coefficient and lower harmonic winding coefficient. The requirement of turns ratio is very strict. If the turns ratio is not ideal, the core loss of the motor cannot be reduced, thus the efficiency will not be improved. In this paper, a design method for converting a star-delta winding of stator in small- and medium-sized motor into the concentric single-double layer star-delta (CSDLSD) winding is introduced and compared with a traditional delta winding and a star-delta winding. Besides, a method is provided to calculate the winding coefficients of the motors with CSDLSD winding according to the turns number per slot. Harmonic component of magnetic flux density in stator tooth and yoke is consequently reduced, combined with partial core loss calculation method, the core loss is decreased. In addition, the core loss in three-phase induction machines equipped with front three winding types is also been estimated and analyzed. To check the analysis validity, two-dimension (2-D) Finite element method (FEM) is applied on three cage induction motors equipped with different winding types but the same prototypes.
CRITICAL ANALYSIS ON INFLUENZA STATUS IN PAKISTAN : CURRENT POLICY, CHALLENGES AND RECOMMENDATIONS
Authors: Ahmed Ali , Saqlain Muhammad , Tanveer Maria , Ali Hussain
Published: July 2019

Influenza is a major public health issue across the globe and developing countries especially facing a threatening situation because of lack of effective policies and limited health care resources. Pakistan, a developing country, ranked 6th among populous countries of the globe with urban population share 40% where influenza virus spreads in early October of the year 2017 and its prevalent activity rises to a maximum by the end of the year. Influenza is endemic in Pakistan and affects all age groups. A major reason for unsuccessful planning and implementation of anti-influenza coverage programs is that current policies are not synchronized with the needs of the population. Effective surveillance network, ensuring sufficient vaccination supply and anti-viral medication corresponding to public needs are important steps to take.
刍议电力营销电费风险类型及控制措施
Authors: 宁 智慧
Published: July 2019

电力营销服务的质量直接影响了供电企业的建设与发展,同时其也成为不断增大供电企业经济效益的重要举措。电力营销中,电费风险十分常见,为了保证电力企业的平稳发展,应正确认识电费风险类型,加大电费风险的控制力度,避免企业遭受经济损失。
解析供水管道施工要点及质量控制
Authors: 齐 歌
Published: July 2019

供水管道项目建设质量与居民的切身利益有着直接关系,其施工质量也成为人们关注的重点内容。本文就对供水管道施工要点以及质量控制措施进行分析,以及提高供水管道施工质量及其经济效益。
发电机冷却水水质自动调节装置的开发与应用
Authors: 李 亮
Published: July 2019

水电站的技术供水常用于发电机冷却,而由于技术供水过滤不彻底以及冷却水循环过程中存在结垢、淤泥、生物附着等问题,导致冷却水在使用过程中水质不稳,影响发电机的正常使用,因此本文以雅玛渡水电站为例,其由于地理位置原理,技术供水存在较多杂质,需要开发设计发电机冷却水水质自动调节装置,同时本文提出相应的操作方式以及巡检事项,保证机器的顺利运行。
电气自动化在电气工程中的应用初探
Authors: 李 琛
Published: July 2019

电气工程中应用先进的电气自动化技术非常重要,其能够有效弥补电气工程弊端,保证电气系统更加可靠稳定的运行。并且将电气自动化技术应用到电气工程当中,能够帮助电气工程中的相关工作人员更好的了解各项电气设备运行情况,结合电气工程中各项设备运行过程中出现的问题,采取合理的解决对策,进一步提升电气设备运行安全。而且电气自动化技术具有良好的监控性能,能够为电气工程中的相关工作人员提供更加精确的监控数据,工作人员通过分析各项数据,判断电气设备可能出现故障的概率,制定有效的故障处理方案。基于此,本文概述了电气自动化,阐述了电气自动化应用的主要特征,对电气自动化在电气工程中的应用及其措施进行了探讨分析,旨在保障电气工程安全运行。
基于HPM视角下的高职数学教学改革分析
Authors: 李 成芳
Published: July 2019

高职院校数学是重要的课程内容,教学质量对学生的能力培养有重要的作用,基于HPM视角下的高职数学教学改革是时代发展对高职院校学生的要求的表现,也是为了激发学生对高职数学的理解的重要方式。通过教学改革,学生对数学知识的掌握发生相应的变化,为培养学生的问题意识、整体结构意识以及数学素养提供方向。
La adopción abierta
Authors: Martos Calabrús María Angustias
Published: July 2019

La Ley 26/2015, de 28 de julio, de Protección a la Infancia y a la Adolescencia, ha introducido una nueva excepción en los efectos jurídicos esenciales de la adopción: la extinción de los vínculos jurídicos entre el adoptado y la familia de origen, otorgando la posibilidad de que pueda mantener, con algún miembro de la familia de origen, alguna forma de relación o contacto a través de visitas o de comunicaciones, lo que se ha denominado, por el legislador, “adopción abierta”. En el Preámbulo de la Ley se justifica esta excepción en “la búsqueda de alternativas consensuadas, familiares y permanentes que permitan dotar de estabilidad familiar a algunos menores, especialmente los más mayores, cuya adopción presenta más dificultades”.
Nepoštena poslovna praksa u hrvatskome pravnom sustavu: uređenje i provedba
Authors: Mišćenić Emilia , Mamilović Iva
Published: July 2019

Pravo
zaštite potrošača relativno je mlada grana prava, koja se u hrvatskome pravnom
poretku počela razvijati prije petnaest godina prihvaćanjem prvog Zakona o
zaštiti potrošača u 2003. godini. Bila je to posljedica ispunjavanja dužnosti
hrvatske države preuzete Sporazumom o stabilizaciji i pridruživanju sklopljenim
2001. godine između Republike Hrvatske i Europskih zajednica te država članica.
Proces harmonizacije odnosno usklađivanja s europskim acquisom u tom području rezultirao je prihvaćanjem
čak triju Zakona o zaštiti potrošača kao lex generalis za zaštitu potrošača, ali i paletom posebnijih propisa kojima se štite
prava potrošača. Danas, pet godina nakon pristupanja Uniji hrvatsko je pravo
zaštite potrošača okarakterizirano iznimnom normativnom fragmentiranošću.
Potrošač se izuzev Zakonom o zaštiti potrošača štiti i Zakonom o obveznim
odnosima, Zakonom o potrošačkom kreditiranju, Zakonom o platnom prometu,
Zakonom o alternativnom rješavanju sporova, Zakonom o elektroničkom potpisu,
kao i Zakonom o općoj sigurnosti proizvoda, ali i Zakonom o pravu na pristup
informacijama te brojnim drugim propisima. Sve to iznimno dovodi u pitanje
učinkovitost provedbe prava zaštite potrošača proizišle iz brojnih izvora prava
EU-a na domaćoj razini RH kao države članice. Od posebne važnosti za
učinkovitost zaštite prava potrošača ističe se upravo provedba odredaba Zakona
o zaštiti potrošača o nepoštenoj poslovnoj praksi. To više što je riječ o
odredbama horizontalne primjene, koje brane nepoštenu poslovnu praksu trgovca u
odnosu na sve odnose B2C (engl. business-to-consumer), bilo da su uređeni Zakonom o zaštiti potrošača, Zakonom o obveznim
odnosima ili bilo kojim drugim propisom. Pet godina od pristupanja RH Uniji
više nego ikad hrvatska sudska praksa i drugi primjenjivači prava nailaze na
brojne poteškoće u vezi s nepoštenom poslovnom praksom trgovaca u svim
područjima, od usluga bankarskog i financijskog sektora do pružanja komunalnih
usluga ili posebice operatera elektroničkih komunikacija. Pravna
fragmentiranost zajedno s poteškoćama koje se tiču ispravne primjene odredaba o
nepoštenoj poslovnoj praksi znatno narušava provedbu prava zaštite potrošača na
domaćoj razini. Autori se u radu posvećuju toj gorućoj temi hrvatskog prava
zaštite potrošača i pokušavaju dati odgovore na neka od brojnih pitanja s
ciljem jačanja učinkovitosti provedbe prava zaštite potrošača u Republici
Hrvatskoj.
Pravo na raskid ugovora prije dospijeća prema Konvenciji Ujedinjenih nacija o ugovorima o međunarodnoj prodaji robe
Authors: Osmanović Kenad
Published: July 2019

Jedan od najpoznatijih i najuspješnijih instrumenata za ostvarivanje
predvidljivosti i uniformnosti trgovačkog ugovornog prava jeste Konvencija
Ujedinjenih Nacija o ugovorima o međunarodnoj prodaji robe, koja je usvojena na
diplomatskoj konferenciji u Beču 1980. godine, a stupila na snagu 1988. godine,
i koju je do sada ratificiralo 89 država svijeta. Ona sadrži materijalnopravne
propise o pitanjima koja se tiču ugovora o prodaji između subjekata koji imaju
sjedište u dvije različite države, a činjenica da ju je ratificiaralo devet od
deset najvećih svjetskih izvoznika i uvoznika, te da se primjenjuje na oko 80%
ugovora o međunarodnoj prodaji robe, govori o njezinom značaju. Konvencija propisuje složen sistem za raskid ugovora vodeći se
principom očuvanja ugovora na snazi dok je god to moguće, tako da na prvi
pogled djeluje iznenađujuća mogućnost raskida ugovora prije dospijeća ugovorne
obaveze. Ipak, kada se uzme u obzir obim njezine primjene, onda ova mogućnost
djeluje sasvim logična, a sve u cilju izbjegavanja bespotrebnih troškova.
U radu su prezentovana rješenja Konvencije koja se odnose na pravo
kupca na raskid ugovora prije dospijeća ugovorne obaveze, odnosno način,
postupak i uslovi koji pri tome moraju biti ispoštovani.
Public Administration in the Islamic World: Considering the Importance of Religion, its Values and Culture
Authors: Hummel Daniel
Published: July 2019

A small but growing area of public administration scholarship appreciates the influence of religious values on various aspects of government. This appreciation parallels a growing interest in comparative public administration and indigenized forms of government which recognizes the role of culture in different approaches to government. This article is at the crossroads of these two trends while also considering a very salient region, the Islamic world. The Islamic world is uniquely religious, which makes this discussion even more relevant, as the nations that represent them strive towards legitimacy and stability. The history and core values of Islam need to be considered as they pertain to systems of government that are widely accepted by the people. In essence, this is being done in many countries across the Islamic world, providing fertile grounds for public administration research from a comparative perspective. This paper explores these possibilities for future research on this topic.
Artan Çocukluk Çağı Obezitesi ve Fokal Segmental Glomeruloskleroz (FSGS): İki Olgu Sunumu
Authors: Koç Nevra , Bayrakcı Umut Selda
Published: July 2019

Çocuklarda nefrotik sendrom nedeni olarak en sık minimal değişiklik hastalığı olarak gözlemlenirken, ikinci sırayı fokal segmental glomerüloskleroz (FSGS) almaktadır. FSGS primer veya sekonder nedenlere bağlı oluşabilmektedir. Sekonder nedenler arasında morbid obezite sıklığının gittikçe arttığı dikkati çekmektedir. Yapılan çalışmalarda vücut ağırlığındaki düşüşün proteinüride azalma ile ilişkilendirildiği gösterilmiştir. Bu amaçla obezite ile ilişkili FSGS olan adölesan iki olgunun tıbbi tedavisi ve diyet yönetimi makalede tartışılacaktır.
Survival of pantoea ananatis, causal agent of maize white spot disease in crop debris
Authors: Sauer Aline Vanessa , Rocha Katia Regina , Gonçalves Ricardo Martins , Meirelles Walter Fernandes , Figueiredo José Edson Fontes , Marriel Ivanildo Evódio , Paccola-Meirelles Luzia Doretto
Published: July 2019

Maize white spot, caused by the bacterium Pantoea ananatis, is one of the most detrimental diseases of maize in Brazil and has contributed to significant yield reduction. In this study, P. ananatis isolates were recovered from maize white spot lesions, healthy leaves, corn crop residues and Digitaria horizontalis. All the bacterial isolates were identified and characterized by morphological traits analysis, acid production from sorbitol and glycerol, ice nucleation activity, metabolic fingerprint similarities and molecular analysis by Polymerase Chain Reaction with species-specific primers for P. ananatis (ANAF/ANAR). Results showed that isolates recovered from maize white spot lesions were similar to those isolates collected from other sources. It suggests that corn crop residues, D. horizontalis and healthy leaf surface of the corn plant itself, could be a source of survival for P. ananatis.
Characterization of genetic resistance in Andean common bean cultivar Amendoim Cavalo to Colletotrichum lindemuthianum
Authors: Nanami Danielle Sayuri Yoshida , Vidigal Maria Celeste Gonçalves , Castro Sandra Aparecida de Lima , Frias Angêlica Albuquerque Tomilhero , Vidigal Filho Pedro Soares , Elias Haroldo Tavares
Published: July 2019

The Anthracnose, caused by Colletotrichum lindemuthianum (Sacc. and Magnus) Briosi and Cavara, is one of the most importante fungal disease of common bean. Several strategies have been used for its control, such as the use of pathogen-free seeds, chemical control and crop rotation. However, the most efficient method to control this disease is the use of resistant cultivars. Previous studies conducted by the Laboratory of Common Bean Breeding and Molecular Biology of the Nucleus of Research Applied to Agriculture (Laboratório de Melhoramento de Feijão Comum e de Biologia Molecular do Núcleo de Pesquisa Aplicada à Agricultura-NUPAGRI) revealed that the Andean cultivar Amendoim Cavalo is resistant to races 2, 7, 9, 19, 23, 39, 55, 65, 73, 89, 1545, 2047 and 3481 of C. lindemuthianum. The objective of this work was to characterize the genetic resistance to anthracnose in Amendoim Cavalo using inheritance and allelism tests. The results of inheritance tests in F2 generation of Amendoim Cavalo × PI 207262 cross, inoculated with 2047 race, fitted in a ratio of 3R:1S, proving the action of a single dominant gene in Amendoim Cavalo cultivar. Allelism tests demonstrated that the dominant gene present in Amendoim Cavalo is independent from the genes previously characterized. The authors propose the Co-AC symbol to designate the new resistant gene to C. lindemuthianum. The results show high contribution to breeding programs, once Amendoim Cavalo cultivar can be considered an important Andean source of resistance to C. lindemuthianum.
Temperature and storage periods on the maintenance of chemical composition of medicinal plants
Authors: Leão Priscila , Neves Leandro , Colombo Ronan , Shahab Muhammad , Oliveira Jane , Luz Francisco , Roberto Sergio
Published: July 2019

Determining the chemical composition of medicinal plants used for therapeutic purposes is of fundamental importance. These plants must meet quality standards for commercialization by ensuring pharmacological properties and efficacy. However, for the maintenance of their active compounds, it is very important to store them at a suitable temperature and ensure the safety of these compounds. The objective of this work was to evaluate the effect of different temperatures and storage periods in the maintenance of chemical composition of bushy lippia (Lippia alba), crajiru (Arrabidaea chica), eucalyptus (Eucalyptus grandis), lemon grass (Cymbopogon citratus), citronella (Cymbopogon nardus) and sage (Lippia microphylla) leaves. Leaves of these medicinal plants were stored for different periods (30, 60 and 90 days) at different temperatures (0, 17 and 24 °C). A complete randomized design was used with five replications, each one with 150g of leaves. For each combination of temperature and storage period, different variables were evaluated such as phenolic compounds, total anthocyanins, antioxidant activity (ORAC and DPPH), carotenoids and chlorophyll contents. Leaves stored at 0°C resulted in the most efficient preservation of chemical compounds at 30, 60 and 90 days. However, this temperature causes physiological damage to the leaves. Therefore, for commercial use, dried or crushed leaves in the form of powder is recommended. Storage at 17 °C keeps the chemical composition of the leaves at satisfactory levels, while at 24 °C there is a significant decrease over the periods of cold storage.
El control parlamentario de los secretos oficiales
Authors: Martínez Vázquez Francisco
Published: July 2019

La reforma del Reglamento del Congreso de los Diputados se ha convertido en una verdadera asignatura pendiente, tal y como puedan ser la reforma del Senado o la modificación del régimen constitucional en cuanto a la sucesión de la Corona o la aprobación del Reglamento de las Cortes Generales que para regir las sesiones conjuntas de ambas Cámaras prevé el artículo 72.2 de la Constitución.

Este artículo pretende contribuir al homenaje que el Nº 100 de la Revista de las Cortes Generales quiere hacer a la Constitución de 1978 en el XL Aniversario de su promulgación. Se trata de exponer la líneas generales en las que se enmarca la reforma del Reglamento del Congreso, destacando el contraste entre el deseo manifestado prácticamente por todos los grupos políticos con representación parlamentaria de llevar a cabo una complete modificación del Reglamento y la falta de éxito en todos los intentos de conseguirlo, analizando las dificultades para lograrlo así como recogiendo las distintas reformas parciales aprobadas hasta la fecha.
La autonomía presupuestaria de las Cortes Generales
Authors: Revuelta de Rojas Isabel
Published: July 2019

La Constitución española de 1978 reconoce expresamente la autonomía presupuestaria del Congreso de los Diputados y del Senado en su artículo 72.La presupuestaria es la menos visible y quizá la más significativa de las manifestaciones de la autonomía de las Cámaras y en España es amplia y se proyecta a la totalidad del ciclo presupuestario y su control, que es el que las Cámaras deciden que sus cuentas deben tener.

Sus orígenes se remontan al medievo y su fundamento jurídico es constitucional y está hoy ligado al concepto de soberanía y al principio de separación de poderes, por lo que se diferencia de la autonomía financiera que, con otro fundamento y en distintos grados, la ley reconoce a algunos órganos constitucionales.

Además de en la Constitución, esta autonomía se recoge en los Reglamentos de cada Cámara y en sus normas internas de desarrollo. Las leyes en materia presupuestaria, contractual, de subvenciones y patrimonial del Estado, también prevén la autonomía presupuestaria de las Cortes Generales.

En los 40 años de vida de nuestra Constitución, el Congreso de los Diputados y el Senado han ejercido con mesura y responsabilidad su deber constitucional en esta materia y han evolucionado en su interpretación conforme a los principios de transparencia y buen gobierno de los caudales públicos.
Pre-Service EFL Teachers’ Perception of Using Facebook Group for Learning
Authors: Purnamasari Asri
Published: July 2019

The current development of ICT has been revolutionizing education. The revolution has now overflown learning beyond the four walls boundary of the classroom. By using ICT, students today can learn anytime and anywhere. This study aimed to explore pre-service EFL teachers' perception of the use of Facebook Group (FBG) in learning. Employed a mixed methods research designed, quantitative and qualitative data were collected from 56 (29 first-year and 27 second-year) students of the English Education Department of Universitas Kristen Indonesia Jakarta using a questionnaire and interview. The finding revealed that the majority of the participants had positive perception towards using FBG as a learning platform. However, since their experience in the informal language learning environment through FBG was new, their view towards the use of FBG for interpretative communication activates was lower than for interpersonal communication.
Using Drama in EFL Classroom
Authors: Angelianawati Luh
Published: July 2019

Due to the many potential benefits and drama can offer in language learning, there has been a growing interest to use drama in ESL/EFL classrooms. However, the practice still causes many difficulties to both teachers and students due to several factors. This article reviews current theories and research findings on the use of drama in ESL/EFL teaching and learning to provide a better understanding of the use of drama to facilitate learning in EFL classrooms. It begins with current theories behind drama use in English learning. This section tries to clarify what drama is in the context of ESL/EFL, what benefits it offers, and what challenges teachers potentially meet. After that, the discussion focuses on a practical guideline for using drama in the classroom. It proceeds with a brief description of some useful drama techniques. The article ends by offering some concluding remarks.
Quantum Features of Macroscopic Fields: Entropy and Dynamics
Authors: Alicki Robert
Published: July 2019

Macroscopic fields such as electromagnetic, magnetohydrodynamic, acoustic or gravitational waves are usually described by classical wave equations with possible additional damping terms and coherent sources. The aim of this paper is to develop a complete macroscopic formalism including random/thermal sources, dissipation and random scattering of waves by environment. The proposed reduced state of the field combines averaged field with the two-point correlation function called single-particle density matrix. The evolution equation for the reduced state of the field is obtained by reduction of the generalized quasi-free dynamical semigroups describing irreversible evolution of bosonic quantum field and the definition of entropy for the reduced state of the field follows from the von Neumann entropy of quantum field states. The presented formalism can be applied, for example, to superradiance phenomena and allows unifying the Mueller and Jones calculi in polarization optics.
Hollow Light Guide Module Involving Mini Light-Emitting Diodes for Asymmetric Luminous Planar Illuminators
Authors: Ye Zhi Ting , Chen Chin Lung , Chen Lung-Chien , Tien Ching Ho , Nguyen Hong Thai , Wang Hsiang-Chen
Published: July 2019

Light-emitting diodes (LEDs) have numerous advantages. However, LEDs only offer a point light source. Therefore, transforming LEDs into planar light sources is a new objective in general lighting applications. Solid light guides have strong uniformity but are marred by their material absorption characteristics and weight. Hollow light guides constitute a solution to the weight problem but exhibit poor uniformity and necessitate sacrificing efficiency to enhance uniformity. To resolve the uniformity, weight, and efficiency problems simultaneously, we propose a hollow light guide architecture involving mini-LEDs with asymmetric luminous intensity. To develop this guide module, we first optimized the aspect ratio of the cavity and then modulated the light path by using varied angles of the reflection surface on the end wall of the module. We then designed a beveled reflection surface near the mini-LEDs to further enhance uniformity. An archetype of the proposed architecture for planar light source modules had a width and depth of 51.5 and 9.95 mm, respectively. Experimental results revealed a total efficiency of 83.9% and uniformity of 92.3%. The module weight was determined to be 215 g, which was 40% lighter than that of similarly sized solid light guide modules.
Assessment of Surface Degradation of Silicone Rubber Caused by Partial Discharge
Authors: Komatsu Kazuki , Liu Hao , Shimada Mitsuki , Mizuno Yukio
Published: July 2019

This paper reports experimental and analytical results of partial discharge degradation of silicone rubber sheets in accordance with proposed procedures. Considering the actual usage condition of silicone rubber as an insulating material of polymer insulators, an experimental procedure is established to evaluate long-term surface erosion caused only by partial discharge. Silicone rubber is subjected to partial discharge for 8 h using an electrode system with air gap. Voltage application is stopped for subsequent 16 h for recovery of hydrophobicity. The 24 h cycle is repeated 50 or 100 times. Deterioration of sample surface is evaluated in terms of contact angle and surface roughness. It is confirmed the proposed experimental procedure has advantage of no arc discharge occurrence, good repeatability of results, and possible acceleration of erosion. Surface erosion of silicone rubber progresses gradually and finally breakdown of silicone rubber occurs. Alumina trihydrate (ATH), an additive to avoid tracking and erosion by discharge, is not necessarily effective to prevent breakdown caused by partial discharge when localized electric field in air is enhanced by adding ATH. In such a situation, lower permittivity and higher resistance of silicone rubber seem dominant factors to prevent partial discharge breakdown and a careful insulation design should be required.
Energy-Efficient Improvement Approaches through Numerical Simulation and Field Measurement for a Data Center
Authors: Wang Fujen , Huang Yishun , Prasetyo BowoYuli
Published: July 2019

The power density of electronic equipment increased dramatically recently. Data center and data processing and telecommunication facilities are facing the exceptionally high sensible heat loads which result in a large amount of energy consumption. In this study, a numerical simulation using computational fluid dynamics (CFD) was conducted to investigate the influence of alternative approaches to avoid bypassing and recirculation for air distribution in a full-scale data center. Field measurements were extensively conducted to validate the simulation results. Various performance indexes were adopted to enhance the evaluation of the thermal performance of the data center. The simulation results revealed that the practice with hot aisle enclosure and the installation of blocking panels for the unoccupied racks can provide satisfactory airflow distribution and thermal management under low load conditions. The return temperature index (RTI) can be improved by 3% through CFD simulation through installation of the blank panels, which reveals the reduction of recirculation airflow. The return heat index (RHI) increases by 8%, which presents a reduction of bypass airflow. A practical experiment using physical air curtains was conducted to enclose the hot aisle in the data center, which also reveals an 8% improvement for bypass airflow. Higher cooling performance can be achieved via reduction of recirculation and bypass airflow in the data center. Through the simulation of different improvement approaches in the data center, the optimum practice for cooling airflow arrangement can be identified accordingly.
A Master/Slave Approach to Power Flow and Overvoltage Control in Low-Voltage Microgrids
Authors: Cavraro Guido , Caldognetto Tommaso , Carli Ruggero , Tenti Paolo
Published: July 2019

This paper proposes a technique to control distributed energy resources in low-voltage microgrids aiming at (i) allowing power flow control at the point of connection with the upstream grid, (ii) keeping voltage profiles within the operational limits. The first feature is crucial in smart low-voltage power systems. In fact, it enables both demand-responses, which is extremely valuable from the point of view of distribution system operators and for energy trading, and the autonomous operation of the microgrid. The latter can be achieved by regulating to zero the power exchanged with the main grid. The second feature allows to limit voltage increases due to active power injection by distributed energy resources and, thus, to limit stresses on the electrical infrastructure and the served loads, which is a concrete issue as renewables become widely deployed in the low-voltage scenario. The proposed approach is firstly described in detail, then a systematic analysis of its local and global properties is reported. All the obtained results are verified considering the IEEE 37 test feeder in realistic operating conditions.
An Imbalance Fault Detection Algorithm for Variable-Speed Wind Turbines: A Deep Learning Approach
Authors: Chen Jianjun , Hu Weihao , Cao Di , Zhang Bin , Huang Qi , Chen Zhe , Blaabjerg Frede
Published: July 2019

Wind power penetration has increased rapidly in recent years. In winter, the wind turbine blade imbalance fault caused by ice accretion increase the maintenance costs of wind farms. It is necessary to detect the fault before blade breakage occurs. Preliminary analysis of time series simulation data shows that it is difficult to detect the imbalance faults by traditional mathematical methods, as there is little difference between normal and fault conditions. A deep learning method for wind turbine blade imbalance fault detection and classification is proposed in this paper. A long short-term memory (LSTM) neural network model is built to extract the characteristics of the fault signal. The attention mechanism is built into the LSTM to increase its performance. The simulation results show that the proposed approach can detect the imbalance fault with an accuracy of over 98%, which proves the effectiveness of the proposed approach on wind turbine blade imbalance fault detection.
Thermal Conduction Simulation Based on Reconstructed Digital Rocks with Respect to Fractures
Authors: Yang Haiyuan , Zhang Li , Liu Ronghe , Wen Xianli , Yang Yongfei , Zhang Lei , Zhang Kai , Askari Roohollah
Published: July 2019

Effective thermal conductivity (ETC), as a necessary parameter in the thermal properties of rock, is affected by the pore structure and the thermal conduction conditions. To evaluate the effect of fractures and saturated fluids on sandstone’s thermal conductivity, we simulated thermal conduction along three orthogonal (X, Y, and Z) directions under air- and water-saturated conditions on reconstructed digital rocks with different fractures. The results show that the temperature distribution is separated by the fracture. The significant difference between the thermal conductivities of solid and fluid is the primary factor influencing the temperature distribution, and the thermal conduction mainly depends on the solid phase. A nonlinear reduction of ETC is observed with increasing fracture length and angle. Only when the values of the fracture length and angle are large, a negative effect of fracture aperture on the ETC is apparent. Based on the partial least squares (PLS) regression method, the fluid thermal conductivity shows the greatest positive influence on the ETC value. The fracture length and angle are two other factors significantly influencing the ETC, while the impact of fracture aperture may be ignored. We obtained a predictive equation of ETC which considers the related parameters of digital rocks, including the fracture length, fracture aperture, angle between the fracture and the heat flux direction, porosity, and the thermal conductivity of saturated fluid.
Children’s DAT1 Polymorphism Moderates the Relationship Between Parents’ Psychological Profiles, Children’s DAT Methylation, and Their Emotional/Behavioral Functioning in a Normative Sample
Authors: Cimino Silvia , Cerniglia Luca , Ballarotto Giulia , Marzilli Eleonora , Pascale Esterina , D’Addario Claudio , Adriani Walter , Maremmani Angelo Giovanni Icro , Tambelli Renata
Published: July 2019

Parental psychopathological risk is considered as one of the most crucial features associated with epigenetic modifications in offspring, which in turn are thought to be related to their emotional/behavioral profiles. The dopamine active transporter (DAT) gene is suggested to play a significant role in affective/behavioral regulation. On the basis of the previous literature, we aimed at verifying whether children’s DAT1 polymorphisms moderated the relationship between parents’ psychological profiles, children’s emotional/behavioral functioning, and DAT1 methylation in a normative sample of 79 families with school-age children (Ntot = 237). Children’s biological samples were collected through buccal swabs, while Symptom Check-List-90 item Revised, Adult Self Report, and Child Behavior Check-List/6–18 was administered to assess parental and children’s psychological functioning. We found that higher maternal externalizing problems predicted the following: higher levels of children’s DAT1 methylation at M1, but only among children with 10/10 genotype; higher levels of methylation at M2 among children with 10/10 genotype; while lower levels for children with a 9-repeat allele. There was also a positive relationship between fathers’ externalizing problems and children’s externalizing problems, only for children with a 9-repeat allele. Our findings support emerging evidence of the complex interplay between genetic and environmental factors in shaping children’ emotional/behavioral functioning, contributing to the knowledge of risk variables for a child’s development and psychological well-being.