bluuebunny/crossref_metadata_2025 huggingface dataset:
Nonlinear Oscillations of a Spherically Symmetric Single Bubble in an Acoustic Field
Authors: Volkova E.V. , Nasibullaeva E.Sh.
Published: April 2019

In the present paper the dynamics of a single gas bubble under the influence of an acoustic field is studied, taking mass transfer through the moving bubble wall into account. Mass transfer is calculated separately in the diffusion problem. Due to changes in the pressure inside the bubble caused by oscillations of its volume, the concentration of the gas dissolved in the liquid undergoes oscillations of large amplitude near the bubble boundary. To eliminate the computational problems associated with the moving boundary, the convection-diffusion equations describing the transport of a gas dissolved in a liquid are written in Lagrangian coordinates.
Influence of Internal Wave on the Sound Propagation in the Subsurface Bubble Layer
Authors: Grimshaw R. , Ostrovsky L.A. , Topolnikov A.S. , Khusnutdinova K.R.
Published: April 2019

In the paper the influence of non-linear internal wave on the propagation of acoustic signal in the subsurface ocean layer containing gas bubbles is considered. During interaction with surface waves the internal wave causes its collapse and influences the structure of bubble layer. Inhomogeneous structure of the layer promotes the local speed of sound and intensity of scattering near the ocean surface to modulate by internal wave with slight shift in phase in the direction of its propagation, which agree with recent experimental observations made on the shelf of Japan Sea.
Using clusterization principles for the selection of repair sections of main oil pipelines based on diagnostic data
Authors: Bogdanov R.M.
Published: April 2019

The problem of determining the repair sections of the main oil pipeline is solved, basing on the classification of images using distance functions and the clustering principle, The criteria characterizing the cluster are determined by certain given values, based on a comparison with which the defect is assigned to a given cluster, procedures for the redistribution of defects in cluster zones are provided, and the cluster zones parameters are being changed. Calculations are demonstrating the range of defect density variation depending on pipeline sections and the universal capabilities of linear objects configuration with arbitrary density, provided by cluster analysis.
Modeling of main oil pipelines operating duties
Authors: Bogdanov R.M. , Lukin S.V.
Published: April 2019

The complexity of the tasks of diagnosing and modeling the main oil pipelines operating modes is a large number of possible operating modes that depend on many parameters, such as: the physical and chemical properties of oil, the scheme of operation, the status and quantity of running pumping and power equipment. The authors developed program complex that allow solving the problem of determining the optimal operating duties for main oil pipelines.
Seismic stability of the underground main pipeline
Authors: Yakupov R.G. , Zaripov D.M.
Published: April 2019

The stress-deformed state of the underground main pipeline under the action of seismic waves of an earthquake is considered. The generalized functions of seismic impulses are constructed. The pipeline motion equations are solved with used Laplace transformation by the time. Tensions and deformations of the pipeline have been determined. A numerical example is reviewed. Diagrams of change of the tension depending on earthquake force are provided in earthquake-points.
Sensory and Composition Analyses of the Aqueous Phases from the Concentration of Guava (Psidium Guava L.) and Mango (Mangifera Indica L.) Juices and the Process-Induced Losses of Vitamin C
Authors: Bodini Renata B. , Montini Evandro M. , de Carvalho Carolina C. , de Moraes Luiz A. B. , Meirelles Antonio J. de A. , de Oliveira Alessandra L.
Published: April 2019

Introduction:

One of the major problems in the juice industry is the loss of the fruit aroma during the thermal concentration techniques. During this process, the water evaporation, which carries the volatiles, compromises the juice’s flavor. In the fruit juice concentration by vacuum evaporation, the aqueous fraction with the volatiles is composed of only one phase.

Methods:

This study analyses the volatiles of the aqueous fractions from the concentration of mango and guava juices in a vacuum evaporator under different temperatures. The volatiles from the aqueous fractions were analyzed using mass spectrometry and the sensorial analysis evaluated the fruit aroma intensity.

Results:

Eighteen volatiles were identified in mango juice, among them, monoterpenes, sesquiterpenes and ketones were the major ones. The major compounds found in both mango juice and its aqueous fractions were 3-carene, β-pinene, β-terpinene and limonene. In the volatile profile of the aqueous fraction from the guava juice, the predominant compounds were aldehydes, such asn-hexanal and, the alcohol eucalyptol. 24 compounds were identified, including alcohols, sesquiterpenes, esters and ketones, and all characteristic volatiles were present in the guava fruit. Under the different temperature and vacuum conditions, the loss of vitamin C ranged from 35 to 77% for mango and from 15 to 55% for guava juices.

Conclusion:

Aqueous fractions collected early in the concentration under different temperatures were richer in the distinctive fruit odor when compared with the fractions collected at the end of the process. The loss of vitamin C was higher at higher temperatures and vacuum applied.
A New Model of Subjective Well-Being
Authors: Kopsov Igor
Published: April 2019

Background:

We propose a new approach to evaluation of SWB, which we specify as a combination of two states, momentary SWB and projected SWB. The former is a measure of satisfaction with transient life experiences, the latter a reflection of expected probability of satisfaction of future aspirations. These two states, independent, but complementary to each other, consist of distinct components associated with different human needs.

Methods:

By postulating need satisfaction as the sole course of attainment of happiness, it allows us to define SWB through functional equations that link level of attained SWB to a need satisfaction ratio, a need ranking, and an estimated probability of future need satisfaction.

Findings:

Subsequently, we present a model of SWB through the lens of our proposed algorithm of human behaviour, which demonstrates the needs satisfaction process. The algorithm consists of several interdependent phases and feedback mechanisms. The theorized feedback mechanisms result in a continuous redefinition of dominant needs due to needs satisfaction. Feedback mechanisms create dynamic and non-linear interrelations between needs, the degree of their attainment and subsequent happiness.

Conclusion:

Through this approach, we explain such phenomena as deflation of happiness, psychological adaptation to hardship, and multiplicity of strategies to attain happiness. The proposed model allows integration of a number of existing SWB theories into a unified concept.
Evaluasi terhadap implementasi lintas minat dalam kelompok peminatan di SMA/MA Kecamatan Lembang
Authors: Riafadilah Anggi , Dewi Laksmi
Published: April 2019

Abstract: This study aims to evaluate the implementation of electives in interest groups in SMA and MA in Lembang District. As for the background in this paper is that in the current 2013 curriculum in force in Indonesia there is now a electives whose purpose is to provide a platform for learners to expand their interests and talents beyond the choice of interests according to their interests, talents, and ability by considering the value report cards, national examination scores, and counseling guidance counseling recommendations at the time the learners are in junior high school. The preliminary study that the authors do that the implementation of electives is not yet effective. Therefore, researchers try to evaluate the implementation of electives in the interest groups in high school and MA in the District of Lembang. Data collection techniques in this study are interviews and documentation studies. The result of this research is the implementation of elevtives in the interest groups in SMA and MA in Lembang not in accordance with the guidelines made by kemendikbud. Such incompatibility in terms of the subject selection process in electives. Schools determine what subjects learners get when it should learners themselves who should choose subjects in the electives. This impact on learning outcomes of learners. Factors that cause electives implementation are not in accordance with the guidelines kemendikbud such as the number of teachers, the number of students, as well as limited facilities and infrastructure. Keywords: Evaluation, Electives, Interset Group
Googling for Neurological Disorders: From Seeking Health-Related Information to Patient Empowerment, Advocacy, and Open, Public Self-Disclosure in the Neurology 2.0 Era
Authors: Martini Mariano , Bragazzi Nicola Luigi
Published: April 2019

Since its introduction, the internet has played a major role in reshaping patient-physician communication and interactions, having fostered a shift from a paternalistic to a patient-centered model. Because of its dynamic nature, the internet has been used as a platform to not only disseminate knowledge—favored by improved access to an increasing wealth of available resources—but also to spread advocacy and awareness, contribute to fund-raising, and facilitate open, public self-disclosure of one’s own disease, thus eliminating any taboo and reducing the stigma associated with it. The era of Medicine 2.0 is characterized by openness, collaboration, participation, and social networking. The current situation is completely different from the time when Lorenzo Odone’s parents, after his diagnosis of adrenoleukodystrophy, decided to attend medical school in order to collect information about a devastating, unknown disease and had to contend with medical authorities at that establishment to convince them of the alleged effectiveness and safety of their discovered therapeutics. Orphan and rare neurological diseases have currently received recognition on web-based resources. However, while the intention is not to ridicule Odone’s family legacy and the “complicated lessons” they have reported, some issues should be carefully addressed by health authorities, such as the reputability, reliability, and accuracy of material available on the internet and prevention of the dissemination of material that could instill illusions and unjustified hopes in individuals seeking medical treatment. Neurologists should be aware of such digital resources, participate in web-based activities, and recommend select high-quality websites to their patients.
Demokrasi Ekonomi Lokal
Authors: Wijaya Mahendra
Published: April 2019

” Artikel ini ingin menunjukkan mengenai sisi demokratis dari usaha bisnis kecil terutama batik di Solo. Dengan menggunakan jaringan sosial berbasiskan kepercayaan dan juga nilai-nilai lokal yang berbasiskan agama dan budaya, usaha bisnis kecil ini dapat bertahan dalam era neoliberal. Semua faktor-faktor ini berhubungan satu sama lain dan menjadi alat utama untuk menciptakan jaminan sosial. Hal ini menunjukkan keterlekatan aktivitas ekonomi dengan konteks sosial budayanya. Berangkat dari realitas tersebut, artikel ini mengusulkan bahwa pemerintah seharusnya memberikan prioritas yang lebih kepada usaha bisnis kecil sebagaimana telah tertulis dalam undang-undang dasar terkait dengan demokrasi ekonomi.”Kata kunci: demokrasi ekonomi, usaha kecil lokal, jaringan sosial, keterlekatan
Pengantar Redaksi
Authors: Sosiologi Jurnal Pemikiran
Published: April 2019

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Kontestasi Elite Dan Marginalisasi Penduduk Lokal Di Lokasi Pertambangan Batu Bara Kutai Kartanegara
Authors: Yuwana Nurhadi , Nugroho Heru , Abdullah Irwan
Published: April 2019

“Konstitusi Indonesia menjelaskan bahwa bumi, air, dan kekayaan alam dikuasai oleh negara dan sebesar-besarnya digunakan untuk kemakmuran rakyat. Akan tetapi kenyataannya berbeda, pengelolaan kekayaan alam, khususnya barang tambang seperti mineral dan batubara tidaklah semudah yang dibayangkan dalam konsep teoritis, banyak kepentingan di belakangnya. Alih-alih memikirkan kepentingan rakyat, pemerintah justru membiarkan pengelolaan itu kepada investor asing. Kontestasi politik terjadi tidak hanya antara negara dengan korporasi tapi juga dengan warga lokal. Artikel ini mencoba menjelaskan fenomena kontestasi dan marginalisasi yang terjadi di Kutai Kartanegara, Kalimantan Timur”Kata Kunci : kontestasi, kapitalisme, marginalisasi
Politik Adil Gender : Sebuah Paradoks
Authors: Partini Partini
Published: April 2019

“Tulisan ini menggambarkan dinamika perempuan di dunia politik. Representasi Politisi perempuan menampilkan paradoksal antara ide kesetaraan dengan kenyataan praksisnya. Perempuan diwacanakan agar dapat menempati posisi strategis dalam skema pembangunan namun implementasinya belum maksimal. Dari segi kuota misalnya sebagian besar parpol bisa memenuhi kuota 30%, namun teori The glass ceiling masih berlaku dalam ranah politik. Pemerintah mencoba memperbaiki dengan penerapan sistem zipper namun paradoks masih terus terjadi. Tulisan ini mencoba menguraikan dinamika dan sekaligus tantangan yang muncul baik secara kultural maupun struktural”Kata kunci : Representasi Politik, Politik Adil Gender
Alfred Schutz : Rekonstruksi Teori Tindakan Max Weber
Authors: Supraja Muhammad
Published: April 2019

“ Artikel ini mencoba menjelaskan mengenai rekonstruksi teori tindakan Weber yang dilakukan oleh Alfred Schutz. Menurut Schutz, teori tindakan Weber cenderung tidak jelas, kabur dan inkonsisten. Bagi Weber, tindakan adalah perilaku yang bermakna, tindakan sosial adalah tindakan, yakni perilaku bermakna yang diarahkan pada orang lain. Sedangkan Schutz merekonstruksi dengan mendefinisikan tindakan sebagai durasi yang berlangsung di dalam perbuatan. Dengan kata lain, tindakan merupakan durasi transenden dalam perbuatan. Suatu tindakan secara independen dapat dianggap sebagai subjek yang melakukan tindakan, namun demikian tindakan merupakan serangkaian pengalaman yang terbentuk melalui kesadaran nyata dan kesadaran individual aktor. Dengan kata lain, tindakan menunjukkan adanya ikatan subjek. “Kata Kunci : Tindakan, Rekonstruksi, Makna
Budaya Gotong Royong Masyarakat Dalam Perubahan Sosial Saat Ini
Authors: Effendi Tadjudin Noer
Published: April 2019

Artikel ini menguraikan tiga isu pokok: gotong royong sebagai perasan dari Panca Sila dan penerapannya dalam interaksi sosial kehidupan sehari-hari, gotong royong mengandung beberapa unsur-unsur modal sosial serta kondisi masyarakat kontemporer yang berada dalam situasi kekacauan sosial karena lemahnya penerapan nilai-nilai gotong royong dalam interaksi sosial. Di duga perubahan sosial yang cepat serta kuatnya tekanan dari luar, terutama ideologi liberal yang berdasarkan individualis memenjadi penyebab kekacauan sosial. Agenda ke depan untuk menguatkan kembali budaya gotong royong juga dibahas dalam tulisan ini.Kata Kunci: Gotong Royong, Panca Sila, Modal Sosial, Perubahan Sosial
Kultur Sekolah
Authors: Efianingrum Ariefa
Published: April 2019

Tulisan ini hendak mengelaborasi sejumlah pemikiran dan konsep yang meyakini pentingnya faktor kultural dalam mendorong dinamika perubahan institusional, khususnya dalam konteks persekolahan (schooling). Perlu tilikan secara seksama bahwa budaya/kultur merupakan kekuatan konstitutif untuk inovasi dan perubahan sosial, sekaligus memiliki kekuatan reflektif dalam melakukan peran legitimasi sosial.Kultur meliputi faktor material yang tangible dan non-material yang intangible. Realitas menunjukkan bahwa kunci keberhasilan pendidikan seringkali justru terletak pada faktor yang tak terlihat. Karenanya, menekankan perbaikan pendidikan di sekolah pada proses restrukturisasi semata, tidak lagi memadai. Namun demikian, restrukturisasi yang bersifat struktural dan rekonstruksi yang bersifat kultural tidak perlu saling menegasikan dalam praktiknya. Dalam pengembangan kultur sekolah, terdapat aneka pilihan alternatif yang dapat disesuaikan dengan visi-misi dan kondisi sekolah, serta profil siswa dalam aneka kecerdasan majemuk (multiple intelligences). Betapapun intervensi kebijakan pendidikan telah dilakukan, tidak akan memberikan efek bermakna, tanpa perubahan yang sifatnya kultural dari dalam institusi pendidikan itu sendiri. Dalam konteks sekolah yang berada dalam masyarakat paternalistik, pimpinan sekolah menjadi ikon yang memiliki peran utama dalam pengembangan kultur sekolah.Kata kunci: pendidikan, budaya, kultur sekolah.
Multikulturalisme dan Politik Anti Kekerasan
Authors: Nugroho Heru
Published: April 2019

Multikulturalisme dan politik anti kekerasan di Indonesia menghadapi kondisi problematis saat ini, pengalaman negara mengelola perbedaan tidak berbading lurus dengan kondisi lapangan yang menunjukkan meningkatnya konflik horizontal. Kasus kekerasan antar etnis dan umat beragaman di Yogyakarta yang terjadi di pertengahan tahun 2014 ini telah menyentak kita bahwa multikulturalisme dan politik anti kekerasan bukanlah proyek temporer negara. Melainkan sebuah pemahaman dan cara berpikir yang perlu dikembangkan terus-menerus oleh semua pihak, sehingga multikulturalisme sebagai filosofi yang mengarahkan semua pihak agar mau saling mendengar dan memahami satu sama lain, tanpa harus menanggalkan prinsip dan keyakinan pribadinya. Revitalisasi dan penegakan filosofi multikulturalisme menjadi rujukan untuk melakukan penguatan peran politik rakyat di hadapan negara, membudayakan diskusi publik dalam proses pengambilan dan penentuan kebijakan, optimalisasi peran dan fungsi institusi lokal sebagai instrumen resolusi konflik dan negara harus mampu menjadi katalisator dalam pemberian peran ekonomi politik. Adapun hasil akhirnya diharapkan warga yang heterogen bisa hidup bersama-sama meskipun berbeda etnis, agama dan ras, sehingga mereka dapat saling menghormati dan memunculkan sikap toleransi.
Capitalist Globalization (Consequences, Resistance, and Alternative) Karya Martin Hart-Landsberg
Authors: Kustiningsih Wahyu
Published: April 2019

Globalisasi ekonomi merupakan bahasan umum dalam masyarakat kontemporer. Globalisasi ekonomi saat ini telah memasuki era post-kolonial dimana orientasi pembangunan lebih mengarah pada pasar bebas yang dikuasai oleh para kapitalis atau korporasi-korporasi raksasa swasta. Sesuai dengan judul bukunya, yaitu, “Capitalist Globalization:Consequences, Resistance, and Alternative”, Martin Hart-Landsberg menawarkan analisa tentang globalisasi kapitalis itu sendiri dan alternatif-alternatif terhadapnya. Menurutnya, kapitalis globalisasi memiliki andil yang cukup besar terhadap terjadinya krisis ekonomi dalam masyarakat kontemporer saat ini.
Pengantar Redaksi "Merangkai Kebinnekaan Indonesia"
Authors: Sosiologi Jurnal Pemikiran
Published: April 2019

Merangkai Kebinnekaan Indonesia
The Public Authority of the Modern State: The Phenomenon of Corruption
Authors: Nisnevich Yuliy A.
Published: April 2019

The article is devoted to the analysis of the influence of the human factor on the corruption in the public authority. The corruption depends on the institutional quality of the public authority, its ability to withstand the negative manifestations of the human factor, and on the officials’ qualities. The motivation of “going to power” has a big significance. Under the authoritarian regimes, the corruption system is generated by the deformations in the election institution. The managerial lustration expediency for the power purification after the regimes’ changes is substantiated. The institutional measures to combat the corruption have been identified.
Susceptibilidad a inundación por flujos torrenciales a partir de la integración del método geomorfológico y de la modelización con FLO-2D, lago Atitlán, Guatemala
Authors: Paricio Salas Sergi , Guinau Sellés Marta , Bach i Plaza Joan , Girón Melgar Luis Iván
Published: April 2019

El lago Atitlán (Guatemala) se encuentra localizado en la zona de paso de los ciclones tropicales formados tanto en el océano Atlántico como en el Pacífico. Este tipo de fenómenos provocan anualmente abundantes e intensas precipitaciones que, a su vez, generan numerosas inundaciones y la formación de flujos torrenciales. El presente artículo pretende profundizar en el conocimiento de este tipo de procesos y en la predicción de su alcance espacial. El trabajo se ha desarrollado en la cuenca de Tzununá y se han tomado como referencia el huracán Stan (2005) y la tormenta tropical Agatha (2010). Durante su paso por la región se registraron máximas de precipitación en dos días de 383 y 269 mm, respectivamente. Para el análisis se ha aplicado el método geomorfológico y se han modelizado flujos con diferentes propiedades reológicas a partir del software FLO-2D. El trabajo de reconocimiento geomorfológico de detalle ha sido esencial y ha permitido validar algunos de los resultados de las modelizaciones y descartar, o dar menor peso, a otros menos representativos de la realidad. La integración de los resultados de ambas metodologías ha permitido la elaboración de un mapa de susceptibilidad a inundación más detallado y de mayor validez.
Análisis de fracturas geológicas en el pozo Agrícola Oriental 2C, Ciudad de México y su relación con fallas mayores
Authors: Vásquez-Serrano Alberto , Camacho-Rangel Rebeca , Arce-Saldaña José Luis , Morales-Casique Eric
Published: April 2019

En años recientes, en la Ciudad de México se han realizado varios pozos exploratorios de hasta 2000 m de profundidad, con el fin de encontrar acuíferos que ayuden a disminuir el desabasto de agua potable para el área metropolitana. En particular, en el pozo Agrícola Oriental 2C, perforado en la Alcaldía de Iztacalco, se recuperaron varios núcleos, uno de los cuales mide 9 m, ubicado entre 1550 y 1559 m de profundidad, cercano al contacto entre rocas calcáreas del Cretácico y rocas volcánicas del Oligoceno, a ~1560 m de profundidad. El núcleo muestra que las rocas volcánicas se encuentran afectadas por una cantidad importante de fracturas, las cuales pueden ser divididas en dos familias con base en su relleno y relaciones de corte (F1 y F2). Las fracturas más jóvenes (F2) se relacionan con una falla, llamada informalmente en este trabajo falla Agrícola Oriental, que pone en contacto rocas sedimentarias y volcánicas.

Las fracturas fueron caracterizadas mediante un análisis detallado de la cantidad, geometría y distribución a lo largo de una línea de muestreo, tomando en cuenta ambas familias de fracturas. Estas variables fueron expresadas en términos de intensidad de fracturas, dimensión fractal de caja y correlación, exponente de Lyapunov, coeficiente de variación y exponente de frecuencia acumulada. Los resultados obtenidos muestran que el espaciamiento entre fracturas, así como la apertura, se ajustan muy bien a una ley de potencia en un gráfico bilogarítmico de su frecuencia acumulada, por lo que las fracturas exhiben un comportamiento fractal. El valor de la intensidad de fracturas, dimensión fractal, exponente de Lyapunov y exponente de frecuencia acumulada de la apertura, disminuyen progresivamente con el aumento de la distancia a la falla, mientras que el coeficiente de variación y exponente de frecuencia acumulada del espaciamiento presentan un patrón contrario. Estos comportamientos suelen ser típicos en una zona de cizalla común, sin embargo, un aspecto importante encontrado en este estudio es la alteración de estos patrones con la presencia de un grupo de fracturas preexistentes (F1) a la formación de un nuevo grupo de fracturas (F2), lo cual provoca un aumento en la cantidad de fracturas y una redistribución de estas estructuras dentro de la zona de falla. Adicionalmente, con base en las características de las fracturas estudiadas, se propone que la falla encontrada en este estudio pertenece al sector norte de la fosa de Santa Catarina y tiene una orientación ENE-WSW.
CONVERSATION CIRCLE TECHNIQUE OF COMMUNITY LANGUAGE LEARNING (CLL) FOR BETTER SPEAKING ABILITY
Authors: Zaswita Hermi
Published: April 2019

Abstrak

Artikel ini bertujuan untuk menguji dampak teknik Conversation Circle of Community Language Learning (CLL) terhadap kemampuan berbicara siswa. Jenis penelitian ini adalah eksperimen dengan rancangan quasi-experiment. Data penelitian ini diperoleh malalui tes kemampuan berbicara siswa kelas XI IPS SMAN 6 Kerinci Tahun Pelajaran 2015/2016. Data yang diperoleh dari tes tersebut dianalisis dengan menggunakan T-test. Berdasarkan hasil analisis data, ditemukan bahwa thitung lebih besar dariÂ  ttabel. Dalam arti teknik Conversation Circle of Community Language Learning (CLL) memiliki dampak terhadap kemampuan berbicara siswa. Teknik tersebut sangat membantu siswa membuat sendiri sebuah percakapan dalam bahasa Inggris dan mengembangkan kemampuan berbicara yang mereka miliki.
STUDENTSâ€™ ABILITY, PROBLEMS AND CAUSES OF PROBLEM IN WRITING EXPLANATION TEXT AT THE FIRST GRADE OF SMAN 1 BATUSANGKAR
Authors: Dina Mela
Published: April 2019

Penelitian ini bertujuan untuk mendeskripsikan kemampuan, masalah serta penyebab masalah yang dialami siswa dalam menulis teks explanation. Jenis penelitian ini adalah deskriftif-qualitatif.Â  Subjek dalam penelitian ini adalah semua siswa kelas XÂ  SMAN 1Batusangkar yang terdiri dari 70 siswa. Instrumen yang digunakan sebagai alat pengumpulan data dalam penelitian ini adalah berupa data kuantitatif dan data kualitatif. Data kuantitatif diperoleh dari tes menulis yang dilaksanakan di kelas. Sedangkan, data kualitatif diperoleh dari wawancara yang dilakukan terhadap 70 orang siswa tersebut. Hasil dari penelitian ini menunjukan bahwa kemampuan dan masalah yang dihadapi siswa dalam menulis teks explanation, dapat digolongkan dalam beberapa kriteria yaitu pola teks, konteks bahasa, ejaan kata dan sintaksis bahasa. Dari kriteria tersebut, hasil rata-rata kemampuan siswa dapat digolongkan bagus. Nilai rata-rata siswa dalam menulis teks explanation adalah 67,74. Namun, sebagian dari mereka masih menemukan masalah terutama dalam konteks bahasa khususnya tata bahasa. Temuan juga menunjukkan bahwa penyebab kesulitan tersebut adalah pengaruh bahasa pertama, bahasa sasaran yang begitu sulit, dan kurangnya pengetahuan siswa tentang komponen dalam menulis teks explanation.

Kata Kunci: Kemampuan, Masalah, Peneyabab Masalah dan Teks Explanation
PENGARUH METODE LATIHAN GAYA SELF CHECK, KONVERGEN DAN KEDISIPLINAN TERHADAP KETERAMPILAN DASAR BERMAIN SEPAKBOLA DI SSB BINA MUDA MUNGKA
Authors: Rahmad Hari Adi
Published: April 2019

Based on the observations of researchers in the field shows that skill of the player SSB Bina Muda District of Mungka are still low, there are many players who have not yet mastered the basic techniques of football. This research aim to reveal the effect of self-check style training method, convergent discovery style and discipline to skill play of football. This type of research is Quasy Experiment. The research population was entire player of age 12 years of SSB Bina Muda which amount to 82 people.WhileÂ  sample in this research was 44 people after conducted the division ofÂ  group 27% with high discipline and 27% with low discipline. The instrument used in this research is a test of skill to play football. Data were analyzed by using variant analysis two-lane (ANAVA 2x2). The results of data analysis showed that (1) there areÂ  differences between the groups playing football skills by training methods self check with group training methods invention of convergent style. (2) there areÂ  differences between the groups playing football high level of discipline and lower level of discipline (3) there are interaction between practice style with discipline to force an increase in the basic skills of playing football (4) at a high level of discipline self check style training method is better than exercise style discovery method converges to an increase in the basic skills of playing football (5) while in the lower level of discipline discovery style training method converges better than self check style training methods to the improvement of the basic skills of playing football.
Groundwater Management Protection Program for Nigeria
Authors: Kalu Nwankwo Nnabueze
Published: April 2019

This article looks into groundwater pollution in Nigeria; groundwater uses and suggests how to go about protection of Nigeria’s underground water. There were case studies of wells at different regions; content analysis indicated physical, chemical and organic factors with parameters that surpassed upper boundaries established by World Health Organization. The public full understanding of economic and social importance of underground water will help in Full integration of Comprehensive Regional Groundwater Protection Program for Nigeria.
Evaluation of toxicity and antioxidative effects of Tussilago farfara and Verbascum thapsus water extracts in zebrafish and in bronchial epithelial cells
Authors: Dragicevic Sandra , Kovacevic Draginja , Divac-Rankov Aleksandra , Nikolic Aleksandra , Radojkovic Dragica , Radovic Svetlana
Published: April 2019

Tussilago farfara (coltsfoot) and Verbascum thapsus (mullein) have been used as folk remedies for treating respiratory disorders. The aim of this study was to test the toxicity of the water extracts of T. farfara and V. thapsus in vivo in zebrafish and in vitro in BEAS 2B epithelial bronchial cells. To the best of our knowledge, this is the first study to investigate the antioxidative properties of T. farfara and V. thapsus extracts in cell culture. Our results show that the T. farfara leaf extract does not produce toxic effects on zebrafish embryos or BEAS 2B cells, and that it has a protective effect in BEAS 2B after induction of oxidative stress. The water extract from V. thapsus displayed pronounced toxic effects on zebrafish embryos and BEAS 2B cells and did not exhibit a significant antioxidative effect on BEAS 2B cells exposed to oxidative stress. Our results suggest that the use of T. farfara water leaf extract is potentially safe and effective in treating respiratory disorders, whereas the use of V. thapsus needs further investigation. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. ON173008]
Analysis of an automotive thermoelectric generator on a gasoline engine
Authors: Temizer Ilker , Yuksel Tahsin , Can Ibrahim , Alnak Dogan
Published: April 2019

This study determined the heat, flow, and electrical power values of and automotive thermoelectric generation system integrated in the exhaust system of an internal combustion gasoline engine. The combustion analyses of the engine integrated with and without automotive thermoelectric generation were carried out. The 20 thermoelectric modules were placed on the rectangular structure which was made of the aluminum 6061 material. The thermoelectric modules were electrically connected to each other in series. The gasoline engine was operated at full load at 1250, 1750, and 2250 rpm, and the electrical energy generated by the automotive thermoelectric generation system was calculated. At the same time, the heat and flow analyses of the automotive thermoelectric generation system were performed using the ANSYS FLUENT commercial software.
Direct numerical simulation of particle Brownian motion in a fluid with inhomogeneous temperature field
Authors: Nie De-Ming , Wang Chang-Bin
Published: April 2019

In this work the fluctuating-lattice Boltzmann method was adopted to numerically investigate the Brownian motion of particles in a fluid with inhomogeneous temperature field. It has been found that the Brownian particles are preferential to randomly move into a cold fluid area. Once the particles go into the cold area, the boundary between the hot fluid and cold fluid acts like a temperature barrier, preventing the particles from going out. Most important of all, the Brownian particles can be captured or collected by the cold fluid area if the temperature of cold fluid is lower than a critical value. In addition, the dependence of this critical value on the fluid viscosity is studied.
Sensitivity analysis of crude oil’s physical properties to total freezing time
Authors: Liu Yang , Xu Ying , Liu Xiaoyan , Cheng Qinglin , Nie Xin , Dai Zhonghua
Published: April 2019

The physical parameters of crude oil are one of the main factors affecting the heat transfer of phase change. A mathematical model for a hot oil overhead pipeline was established, taking latent heat impact, the non-Newtonian properties of crude oil, and nature convection heat transfer into account. Compared with the experimental data, the model and the solution method were correct. A criterion was made to estimate the crude oil total freezing in a pipeline by tracking the change trajectory of the maximum temperature point. The effects of the crude oil with average properties on the total freezing time in a pipeline were analyzed, and the sensitivity of the different influencing factors was investigated by orthogonal test.
Lattice Boltzmann method simulation of the gas heat conduction of nanoporous material
Authors: Han Ya , Li Shuai , Liu Hai-Dong , Cui Weipeng
Published: April 2019

In order to deeply investigate the gas heat conduction of nanoporous aerogel, a model of gas heat conduction was established based on microstructure of aerogel. Lattice Boltzmann method was used to simulate the temperature distribution and gas thermal conductivity at different size, and the size effects of gas heat conduction have had been obtained under micro-scale conditions. It can be concluded that the temperature jump on the boundary was not obvious and the thermal conductivity remained basically constant when the value of Knudsen number was less than 0.01; as the value of Knudsen number increased from 0.01 to 0.1, there was a clear temperature jump on the boundary and the thermal conductivity tended to decrease and the effect of boundary scattering increased drastically, as the value of Knudsen number was more than 0.1, the temperature jump increased significantly on the boundary, furtherly, the thermal conductivity decreased dramatically, and the size effects were significantly.
Biomechanical Effects of Four Different Configurations In Salter Harris Type 4 Distal Femoral Epiphyseal Fractures
Authors: GÖK Kadir , İNAL Sermet , GÖK Arif
Published: April 2019

In this study, the
biomechanicaleffects of four different configurations (Parallel K wires,
Parallel Screw, Upper K wire-Lower Screw, Upper Screw-Lower K wire), which are
used for stabilizing Salter-Harris (SH) Type 4 epiphyseal fracture of distal
femur after reduction process, on the epiphyseal plate has been investigated
under axial, rotational and bendingforces in order to determine the most
advantageous configuration. The fourdifferent configurations have been modeled
by using SolidWorks and computer-aided numerical analyses were performed by
finite element analysis software. The mesh process, boundary conditions and
material model have been applied in finite element analysis software for each
configuration. In addition, von-Mises stress values on epiphyseal plate, screws
and K wires have been calculated. There is a general near trend on stress
values in all configurations on physis line under bending (varus-valgus
angulation, anterior-posterior angulation) and torsional forces in the frontal,
sagittal and transverse plane respectively. Considering the axial forces, the
highest stress was found on parallel K- wires configuration in physis while the
lowest stress was found in parallel screw configuration. It has been found
particularly advantageous to use fixation type in parallel screw configuration.
In addition, in SH type 4 epiphyseal fracture, fixation type is found to be
disadvantageous in K wire configuration.
7075-T6 Alaşımının Mikroyapı ve Mekanik Özelliklerine Tavlama İşleminin Etkisinin Deneysel Olarak Araştırılması
Authors: DEMİREL Mehmet Yasin , KARAAĞAÇ İbrahim
Published: April 2019

7075-T6 alaşımları yüksek mekanik
özelliklere ve oda sıcaklığında sınırlı şekillendirilebilirliğe sahip
malzemelerdir. Şekillendirme öncesi uygulanan tavlama işlemi alüminyum
alaşımlarında şekillendirilebilirliği arttırmakta ancak alaşımın mekanik ve mikroyapı
özelliklerini de etkilemektedir. Bu etkileri belirlemek amacıyla, 7075-T6 sac
malzemesinin mekanik ve mikroyapı özelliklerine tavlama işleminin etkileri
deneysel olarak araştırılmıştır. Tavlama sıcaklığı (100°C, 200°C, 300°C ve
400°C) ve tavlama süresi (6, 30 ve 60 dk.) deney parametreleri olarak
belirlenmiştir. Alaşımın mekanik özelliklerindeki değişimi tespit etmek için
çekme ve sertlik ölçme testleri kullanılmıştır. Tavlama işleminin 7075-T6
malzemesinin mekanik özelliklerini azalttığı gözlemlenmiştir. Oda sıcaklığı
(20˚C)ʹndan 100˚C-60 dk. tavlama parametresine kadar sac malzemenin mekanik
özelliklerinde değişim gözlemlenmezken, 200˚C-6 dk. tavlama parametresinden
itibaren mekanik özelliklerin azalmaya başladığı ve 200˚C-60 dk.ʹdan sonra da
bu azalmanın belirgin bir şekilde arttığı tespit edilmiştir. Malzemenin oda
sıcaklığında sahip olduğu mekanik özelliklerin 400˚C deki tavlama işlemi
sonucunda %68,85 azaldığı gözlemlenmiştir. Bu durumun, 200˚C tavlama sıcaklığı
60 dk. tavlama süresinden sonra malzemenin mikroyapısında çökelti oluşumunun ve
tanecik boyutunun artmaya başlamasından kaynaklandığı belirlenmiştir.
Titanyum Dioksit/İndirgenmiş Grafen Oksit Kompozitlerin Üretimi ve Fotokatalitik Özelliklerinin İncelenmesi
Authors: YURDDAŞKAL Metin , KARTAL Uğur , DOLUEL Eyyüp Can
Published: April 2019

Bu çalışmada, titanyum dioksit/indirgenmiş grafen oksit (TiO2/rGO) kompozitleri sol-jel yöntemi kullanılarak sentezlenmiştir. Hummers metodu ile üretilen grafen oksitten (GO) kimyasal indirgeme yardımıyla rGO elde edilmiştir. TiO2/rGO kompozitleri ağırlıkça % 0,5, 1, 2, 4, 6 oranlarında rGO içerecek şekilde üretilmiş olup rGO katkısının yapısal, morfolojik ve fotokatalitik özellikler üzerine etkisi araştırılmıştır. Buna ek olarak TiO2/rGO kompozitleri ile karşılaştırma yapabilmek için saf TiO2’de üretilmiştir. TiO2/rGO kompozitlerinin kristal faz yapısı, yüzey morfolojisi ve kimyasal bağ yapısı XRD, SEM ve FTIR kullanılarak karakterize edilmiştir. Fotokatalitik performansın belirlenmesi için Uv-Vis spektroskopisi kullanılarak absorbans değerleri elde edilmiştir. Fotokatalitik özelliklerinin incelenmesi sonucunda ağırlıkça % 4 rGO içeren kompozitin % 87,1’lik bir fotokatalitik parçalama verimine sahip olduğu görülmüştür. Bu çalışma, TiO2’ye ağırlıkça % 4’lük rGO eklenmesiyle elde edilen TiO2/rGO kompozitinin fotokatalitik performansı saf TiO2’ye kıyasla % 20 arttırdığını göstermiştir.
Novel approach for weld depth determination using optical coherence tomography measurement in laser deep penetration welding of aluminum and steel
Authors: Mittelstädt Christoph , Mattulat Thorsten , Seefeld Thomas , Kogel-Hollacher Markus
Published: April 2019

The optical coherence tomography (OCT) is a measuring technology which is well-established in medical engineering since the early 1990s. More recently, the technology found its way into laser materials processing where it is used for seam tracking and inspection and also for monitoring and control of deep-penetration laser welding. In this work, deep-penetration laser welding of aluminum and steel using an OCT-system for in-process monitoring of the weld depth was investigated. It is shown that statistical data processing is mandatory to extract the actual keyhole depth. Therefore, two different measures, percentile filtering and considering the frequency distribution of the OCT-data, were considered. Thereby, it is demonstrated that the frequency distribution of the OCT-data has a specific pattern with a local maximum which correlates with the keyhole depth. Moreover, this feature is more significant for welding aluminum and therefore enables one to detect the weld depth more independently and accurately compared to currently applied measures.
Flexible control over optical reflection property of metallic surfaces via pulse laser
Authors: Luo Xiao , Cai Mingyong , Liu Weijian , Chen Changhao , Pan Rui , Zhang Hongjun , Zhong Minlin
Published: April 2019

The control of fundamental optical properties, such as transmission and reflection, over metallic surfaces plays a significant role in multiple fields like solar cells and aerospace. The direct laser etching in air can perform a variety of flexible control abilities in optical functional metal surfaces. In this paper, the authors use the aluminum alloy as an example of widely metal materials and propose two kinds of controlling strategies: large-range controlling strategy and small-range precise controlling strategy. The former changes the process repeat number of femtosecond lasers or the scanning speed of nanosecond lasers. The latter combines the femtosecond laser and the nanosecond laser. The results show that when the process repeat number of femtosecond lasers is changed from 30 to 1, the height of the induced micropillars on the surface of Al alloy is changed from 80 to 6 μm. As a result, the reflectivity of samples will change from ∼16% to ∼87%. The nanosecond laser-induced micro-/nanostructures achieve the reflectivity changing from ∼18% to ∼79% when the scanning speed changes from 10 to 400 mm/s in a spectrum range of 250–2000 nm. What is more, after being fabricated in the way of two-step controlling strategy, the reflectivity raises from ∼30% to ∼40% when the scanning speed of nanosecond lasers changes from 10 to 200 mm/s, while the reflectivity of samples fabricated simply by nanosecond laser changes from ∼18% to ∼66% when the scanning speed changes in the same range and other parameters are kept the same. In addition, the authors demonstrated that the two-step precise controlling strategy is applicable to a variety of metals such as copper, stainless steel, and titanium.
Electrocardiographic changes in patients with pre-eclampsia
Authors: Loukrakpam Bidyarani , Geetanjali Laishram , Luikham O. Puinabati , Shylla Sanjoy K.
Published: April 2019

Pre-eclampsia is a hypertensive disorder of pregnancy that is associated with elevated maternal risk for cardiovascular disease. Electrocardiographic (ECG) changes in pre-eclampsia have been documented in some studies. Electrocardiography has recently emerged as a useful tool to evaluate cardiovascular complication during and after pregnancy. The present study was therefore undertaken to find out electrocardiographic changes in pre-eclamptic women, visiting Regional Institute of Medical Sciences, Manipur. The aim of this study was to determine the electrocardiographic changes in both pre-eclampsia and age matched normotensive pregnant women. In this study, 25 pregnant women (gestational age >20 weeks) with pre-eclampsia in the range of 18 to 45 years of age were recruited and compared with the equal number of age matched normotensive pregnant women. ECG parameters of pre-eclamptic women were compared with those of normotensive pregnant women. The data were then analyzed using SPSS software. Pre-eclamptic women showed significantly longer QRS (0.10±0.02 sec vs 0.09±0.05 sec), prolonged QT (0.401±0.03 sec vs 0.365±0.003sec) and QTc (457.73±37 msec vs 416.47± 25.4 msec) than control group. The study shows that electrocardiography can be used to evaluate cardiovascular risk in pre-eclamptic women.
UM PANORAMA DAS PESQUISAS CENTRADAS NOS CURRÍCULOS PRATICADOS NA EDUCAÇÃO BÁSICA BRASILEIRA NA ÁREA DA EDUCAÇÃO MATEMÁTICA NO PERÍODO DE 1987 A 2012
Authors: Palanch Wagner Barbosa de Lima , Pires Célia Maria Carolino
Published: April 2019

Neste artigo, nosso objetivo é investigar e analisar a produção acadêmica expressa nas teses e dissertações sobre Currículo em Matemática produzidas no período de 1987 a 2012, de forma a compreender a configuração desta temática no campo da Educação Matemática brasileira e o que se tem produzido sobre os currículos em ação e os currículos realizados. Metodologicamente, assume-se como uma investigação dentro da abordagem qualitativa de caráter interpretativo e do tipo estado da arte com a utilização da Análise Textual Discursiva para a construção dos metatextos que emergem das leituras dos trabalhos analisados. Os resultados apontam que mesmo a Matemática e as questões curriculares sendo utilizadas em diferentes campos e por pesquisadores que apresentam formações distintas, averiguamos a importância da Matemática como uma área que favorece a formação do sujeito como um ser social e o desenvolvimento educacional. Por proporcionar ao estudante expor seus pensamentos e repertórios, respeitando o repertório de cada indivíduo, ela permite apreender novos conhecimentos, valorizando a diversidade, pois é justamente esta última que enriquece o seu campo.
Mobilisation of Income Zakat Payment In Indonesia
Authors: Doktoralina Caturida Meiwanto , Bahari Zakaria , Abdullah Sakinatul Raadiyah
Published: April 2019

The objectives of the study establish a conceptual framework to strengthen institutions that support the mobilisation of paying zakat and to identify the concept of the cultural factor of mutual assistance in paying zakat. This is Important because the institution of zakat has implemented the collection of zakat. Meanwhile, the culture of mutual assistance in Indonesia can be a power of zakat payment mobilisation to gain the blessings of Allah SWT. This paper presents the factors of determining mobilisation of zakat payments, e.g., are awareness, willingness to donate, confidence in collection and distribution with the latest development of technology. The implication of this study will help mobilise the payment of income zakat in Zakat Institutions. This study uses the documentation analysis method. Factors affecting mobilisation are awareness, willingness to donate, confidence in collection and distribution with the latest development of technology to help mobilise the payment of income zakat in Zakat Institutions. Keywords : Collection, Mobilisation, Payment, Sincerity, Zakat
Poststronismo, reforma constitucional y transición democrática. La construcción de una nueva legalidad en Paraguay
Authors: Prego Florencia
Published: April 2019

El derrocamiento de Alfredo Stroessner (1989), como corolario de un golpe que se produjo “desde arriba” y desde el interior del mismo régimen, desató una crisis hegemónica con vigencia hasta la actualidad. La propuesta de este trabajo es analizar, desde la perspectiva de la sociología histórica, los mecanismos utilizados tras el fin del régimen autoritario stronista para reconstruir la legalidad y otorgarle al régimen democrático la legitimidad necesaria para reproducir la forma de dominación. En ese sentido, nos abocaremos al análisis de la reforma de la Constitución Nacional (1992), que expresa la pugna imperante entre las fuerzas conservadoras y las fuerzas democráticas en el bloque dominante en Paraguay, en el marco de un contexto regional que favorecía a estas últimas.

Sin embargo, la herencia en el sistema político en general y en la cultura política en particular de elocuentes signos de autoritarismo, la singular naturaleza del Estado paraguayo, como así también las disputas suscitadas en el seno de las clases dominantes, hicieron del tránsito a la democracia un camino largo y sinuoso que, hasta la actualidad, evidencia importantes signos de continuidad respecto al régimen dictatorial depuesto a fines de la década de los ochenta.

La reforma constitucional incorporó una serie de modificaciones de las que nos interesa destacar tres: la prohibición de la reelección presidencial, la incorporación del juicio político y el reemplazo el estado de sitio por el estado de excepción. A partir de estas tres modificaciones o incorporaciones buscaremos analizar y problematizar la construcción de esta nueva legalidad y los condicionamientos que impartieron a la transición y al proceso de consolidación de la democracia en Paraguay.