bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of welding parameters on tensile properties and fracture modes of resistance spot welded DP1200 steel
Authors: Elitas Muhammed 
Published: February 2021

Abstract
In this study, the maximum tensile shear load bearing capacity and fracture modes of resistance spot welded DP1200 steel were investigated, and the tensile shear properties of the joints were evaluated. The effects of different welding parameters on tensile shear properties, fracture modes, microstructure, microhardness, and heat affected zone softening were examined. Weld processes were performed by using 2 to 6 bar electrode pressure as well as 5 and 7 kA weld currents. The microstructure of resistance spot welded materials was evaluated, and the hardness profiles were determined. Experimental results showed that welding current and electrode pressure had a significant effect on the load-displacement characteristics of DP1200 welds. Three different fracture modes were observed in the tensile shear loads. It was also observed that the expulsion had a negative effect on the tensile shear properties.
Investigation of wear on the upper edges of webs of thin-film coated single-screw extruders processing pure polymers
Authors: Buttler Torben , Hamje Jens , Reiter Rolf , Wesling Volker 
Published: February 2021

Abstract
During polymer extrusion there are a variety of situations in which the screwthread of the extrusion screw has an unlubricated metal-to-metal contact with the barrel wall. At the same time the screw coating is subjected to the highest loads. The combination of a secondary hardening cold work steel 1.2379 and a chromium nitride coating deposited by ARC-PVD, which is frequently used in polymer processing, is characterized and investigated. The characterization is done by metallographic examination, SEM and CLSM. The tests were performed on a pin-on-disk and a pin-roll test rig. Different roughness levels were tested on the pin-on-disk test, where massive differences in wear behavior were found. A hybrid surface structure is proposed to optimize the tribosystem. On the pin-on-disk test stand, rollers made of the same material pairing were tested. The test speed was varied to highlight differences and similarities between the tribological systems. A wear minimization of 50 % was achieved and the similarities between the tribological systems were highlighted. In addition, the investigations led to the development of a new model thesis which provides a reason for the development of stippling on the screw when processing polycarbonate.
Variation of electrode materials and parameters in the EDM of an AA7075-TiO2 composite
Authors: Alagarsamy Sivasamy , Ravichandran Manickam 
Published: February 2021

Abstract
The present study was carried out to analyze the effect of process parameters during EDM machining of AA7075-10 wt.-% TiO2 aluminum matrix composite (AMC). The composite was produced through stir casting. The EDM process parameters such as the electrode material (Cu, Br, EN-8), pulse current (5, 10 and 15 A), pulse ON time (300, 600 and 900 μs) and pulse OFF time (30, 60 and 90 μs) were chosen to study the effects on material removal rate, surface roughness and the electrode wear ratio. The experiment was carried out as per L27 orthogonal array based on Taguchi’s design of experiments. Signal-to-noise ratio and analysis of variance were used to identify the contribution of each input parameters on the output responses of the EDM process. The experimental results shows that pulse ON time and pulse current are the most significant factors for the material removal rate; pulse ON time and electrode material are the most influencing parameters for surface roughness and the electrode wear ratio.
The corrosion behavior of marine aluminum alloy MIG welded joints in a simulated tropical marine atmosphere
Authors: Gong Lihua , Guo Weimin , Pan Feng 
Published: February 2021

Abstract
The influence of metal inert-gas arc welding (MIG) on the corrosion behavior of 6061-T6 aluminum alloy in a simulated tropical marine atmospheric environment (related to high temperature, high humidity and high salt spray) were examined by dry-wet alternate immersion corrosion tests. The equivalent conversion was used to design the accelerated test time. The results show that in the initial stage, the intermetallic compound, rich in Fe, Si and Cu, had little influence on corrosion resistance in the heat-affected zone. For a corrosion time of 3 days in a tropical marine atmospheric environment, the corrosion rate of the welded joint increased rapidly, even reaching 3.5 times that of the base metal. Though the corrosion products had significant impact on slowing down the corrosion rate, as with the base metal, the corrosion rate of the welded joint was nearly double that of the base metal during the longest cycle period involving alternate immersion corrosion tests for 20 days.
Idioms in Context: Evidence from a Time Cloze-Response Study
Authors: Kędzierska Hanna , Błaszczak Joanna , Klimek-Jankowska Dorota , Gulgowski Piotr , Witkowski Wojciech 
Published: February 2021

Summary
This article reports on two timed cloze-response experiments which examine the impact of context on idiom recognition. Study 1 presented participants with the beginnings of Polish VP idioms without any prior context. Cloze probabilities and response times for idiom continuations were measured to establish the idiom recognition point (IRP) for each idiom. In Study 2, we used the same idioms in two kinds of contexts: (i) supporting a figurative meaning and (ii) supporting a literal meaning. Cloze probability and response times were measured at the IRP and one word before and after it. The figurative meaning of idioms was automatically activated at the IRP independently of the type of context. Additionally, the figurative context did not move the IRP to an earlier position, whereas in the literal context the responses were significantly slower at the IRP as compared to the figurative context condition. Such a finding indicates that, irrespective of the literal context, the comprehenders automatically activated the figurative meaning of an idiom at the IRP, but they had to discard it later. The literal meaning was computed from the literal meanings of idiom constituents stored in idiom lexical representation, which was computationally costly.
Between Power and Love: Pilate’s Transformation in The Master and Margarita
Authors: Vladislavovich Bosnak Dmitry 
Published: February 2021

Summary
The conventional reading of the “ancient” chapters of Bulgakov’s The Master and Margarita attributes the role of an active moral subject to Pilate and a largely passive role to Ieshua. Proceeding from this assumption, the encounter between these characters is interpreted as an ethical event, in which Pilate is supposed to make decisions based entirely on his own will. This paper challenges this reading by arguing that Ieshua, generally considered the epitome of love, is the actual source of the events in which Pilate is involved. This idea is demonstrated by a comparison with the early Christian experience that views divine love as prior to power and intellect. The analysis traces Pilate’s inner transformation caused by the impact of proactive love and of the actual person of Ieshua, rather than his ideas, which clarifies the meaning of the encounter of these protagonists in Bulgakov’s novel.
The Phosphoprotein Synapsin Ia Regulates the Kinetics of Dense-Core Vesicle Release
Authors: Yang Hui-Ju , Chen Pin-Chun , Huang Chien-Ting , Cheng Tzu-Lin , Hsu Sheng-Ping , Chen Chien-Yu , Lu Juu-Chin , Wang Chih-Tien 
Published: February 2021

Common fusion machinery mediates the Ca2+-dependent exocytosis of synaptic vesicles (SVs) and dense-core vesicles (DCVs). Previously, Synapsin Ia (Syn Ia) was found to localize to SVs, essential for mobilizing SVs to the plasma membrane through phosphorylation. However, whether (or how) the phosphoprotein Syn Ia plays a role in regulating DCV exocytosis remains unknown. To answer these questions, we measured the dynamics of DCV exocytosis by using single-vesicle amperometry in PC12 cells (derived from the pheochromocytoma of rats of unknown sex) overexpressing wild-type or phosphodeficient Syn Ia. We found that overexpression of phosphodeficient Syn Ia decreased the DCV secretion rate, specifically via residues previously shown to undergo calmodulin-dependent kinase (CaMK)-mediated phosphorylation (S9, S566, and S603). Moreover, the fusion pore kinetics during DCV exocytosis were found to be differentially regulated by Syn Ia and two phosphodeficient Syn Ia mutants (Syn Ia-S62A and Syn Ia-S9,566,603A). Kinetic analysis suggested that Syn Ia may regulate the closure and dilation of DCV fusion pores via these sites, implying the potential interactions of Syn Ia with certain DCV proteins involved in the regulation of fusion pore dynamics. Furthermore, we predicted the interaction of Syn Ia with several DCV proteins, including Synaptophysin (Syp) and solubleN-ethylmaleimide-sensitive factor attachment receptor (SNARE) proteins. By immunoprecipitation, we found that Syn Ia interacted with Syp via phosphorylation. Moreover, a proximity ligation assay (PLA) confirmed their phosphorylation-dependent,in situinteraction on DCVs. Together, these findings reveal a phosphorylation-mediated regulation of DCV exocytosis by Syn Ia.SIGNIFICANCE STATEMENTAlthough they exhibit distinct exocytosis dynamics upon stimulation, synaptic vesicles (SVs) and dense-core vesicles (DCVs) may undergo co-release in neurons and neuroendocrine cells through an undefined molecular mechanism. Synapsin Ia (Syn Ia) is known to recruit SVs to the plasma membrane via phosphorylation. Here, we examined whether Syn Ia also affects the dynamics of DCV exocytosis. We showed that Syn Ia regulates the DCV secretion rate and fusion pore kinetics during DCV exocytosis. Moreover, Syn Ia-mediated regulation of DCV exocytosis depends on phosphorylation. We further found that Syn Ia interacts with Synaptophysin (Syp) on DCVs in a phosphorylation-dependent manner. Thus, these results suggest that Syn Ia may regulate the release of DCVs via phosphorylation.
Modeling Social, Health, and Vaccines Intervention in Time of Covid-19 Pandemic Impacted in Jakarta - Indonesia
Authors: Setiawan Arief Ameir Rahman , Susanto Heru , Adjie Firman Tri , Prasetiya Hafiizh , Laksmono Joddy Arya , Sulaswatty Anny , Wiloso Edi Iswanto , Hidayat Dudi 
Published: February 2021

Since the first outbreak of SARS-CoV-2 worldwide, research on modeling and simulation has grown, particularly to estimate the peak and end time of the pandemic which has been exceeded in some cases. This study aims to model the current virus spread with discrete event simulation, using the case of Jakarta. About 2 million of Jakarta's susceptible population was used for the the model's input which ran for a year. The data was obtained from past records and were divided into three main timelines (i.e. initial stage, large scale restriction and new normal) in order to validate the model with real cases step by step. Scenario analysis was then performed by evaluating five possible interventions such as: existing scenarios, social and health intervention, mass vaccination and hybrid intervention. The results show that the model represents real cases with a variation of less than 5% during the timeline. Furthermore, scenario analysis showed that mass vaccination, hybrid and social intervention provide the least positive cases in the system. This study recommends that hybrid intervention should be used while the vaccine is being mass produced, and the implementation of social intervention should be highlighted.
“El más importante asunto internacional”: Belice, el Imperio británico y la política exterior guatemalteca en la posguerra (1945-1948)
Authors: Véliz Estrada Rodrigo 
Published: February 2021

En febrero de 1948 se desató un conflicto entre Guatemala y el Imperio británico que por poco llega a las armas. El problema giró en torno a Belice y se dio en el contexto del fin de la Segunda Guerra Mundial, cuando los británicos se sentían más vulnerables. Así, reaccionaron exageradamente a la activa, aunque caótica, estrategia del gobierno guatemalteco para recuperar el territorio. Gran Bretaña envió tropas y barcos de guerra a Belice, en medio del intento de Estados Unidos por crear una OEA de corte anticomunista. Archivos desclasificados de Gran Bretaña, Estados Unidos, México y nuevas cartas personales de altos funcionarios guatemaltecos ayudan a recrear este olvidado e ilustrador momento del inicio de la Guerra Fría en América Latina.
Palabras claves: Belice, Imperialismo británico, colonialismo, Revolución guatemalteca, Guerra Fría.
¡No más hippies! Identidad juvenil, memoria y pánico en la Guerra Fría: el mayo de 1968 en Costa Rica
Authors: Chaves Zamora Randall Andrés 
Published: February 2021

En mayo de 1968, la visita de una decena de jóvenes extranjeros que se identificaban como hippies causó un amplio pánico moral en los medios, las autoridades y la sociedad costarricense. Este artículo analiza ese acontecimiento a través de las memorias juveniles y la información periodística sobre esos días. Para hacerlo el texto se divide en tres momentos: primero, presenta la discusión que antecedió tal visita y en un segundo instante estudia las respuestas de las autoridades asociadas al pánico. La tercera parte analiza las posturas de la sociedad frente a este acontecimiento y el texto concluye con una valoración del papel que tuvo este evento en las discusiones sobre las identidades juveniles en Costa Rica, con el fin de evaluar las acciones de la juventud en ese contexto, comprenderlas en una dimensión inaugural y en el marco transnacional de un año icónico para las juventudes de la Guerra Fría.

Palabras claves: historia, Guerra Fría, juventud, memoria, pánico moral, hippies, movimiento estudiantil, Costa Rica.
Encuentro Nicaragua 1979-2019: De la Revolución a la insurrección
Authors: Villena Fiengo Sergio 
Published: February 2021

El Encuentro Nicaragua 1979-2019: De la revolución a la insurrección se realizó entre el 26 y el 30 de agosto del 2019, en la Universidad de Costa Rica, con la coordinación general del Instituto de Investigaciones Sociales y con el apoyo de la Vicerrectoría de Acción Social. El objetivo general del Encuentro fue reunir una pluralidad de actores y analistas que, haciendo énfasis en las voces silenciadas y en las zonas grises de la historia oficial, realizaran un balance de lo ocurrido en Nicaragua en esas cuatro décadas, enmarcadas por dos momentos clave de la historia, el triunfo de la Revolución en 1979 y la insurrección cívica de 2018. Con una excepción, todas las actividades fueron presenciales, en el Instituto de Investigaciones Sociales, la Sede del Pacífico y la Sede de Occidente, y se transmitieron en tiempo real por Facebook Live. Las grabaciones se encuentran a disposición del público en el sitio web del IIS, mediante el siguiente enlace: https://iis.ucr.ac.cr/index.php/recursos/encuentro. Este texto presenta una relatoría general y comprensiva del Encuentro y sus actividades preparatorias.
Desenvolvimento motor de uma criança com Síndrome de Rubinstein-Taybi submetida à intervenção fisioterapêutica
Authors: Pinheiro dos Santos Aila , Costa da Silva Natali , De Almeida Nascimento Luana Karina 
Published: February 2021

OBJETIVO: Analisar o comportamento motor de uma criança com Síndrome de Rubinstein-Taybi sob estimulação fisioterapêutica. MÉTODO: Trata-se de um estudo de caso realizado com uma criança diagnosticada com SRT avaliada antes, durante e após sessões de fisioterapia através da Alberta Infant Motor Scale. O tratamento foi realizado no Centro de Integração Raio de Sol, em Aracaju/SE, onde as condutas foram aplicadas três vezes na semana, com duração de 50 minutos, e consistiram no treino das posturas neuroevolutivas. RESULTADOS: Verificou-se aumento nos escores de todas as posturas a partir da segunda avaliação, o que demonstra melhora no desenvolvimento motor. CONCLUSÃO: A intervenção fisioterapêutica pode trazer benefícios no tratamento do atraso característico da SRT, ratificando a importância de novos estudos que investiguem o desempenho motor e o efeito da estimulação precoce em crianças com essa síndrome.
Penggunaan Games untuk Meningkatkan Keterampilan Berbicara Siswa
Authors: Damayanti Annisa , Sudana Dadang , Wirza Yanty 
Published: February 2021

Games berpotensi sebagai salah satu metode yang bermafaat dalam mengajar kemampuan berbicara, tetapi peangamatan awal yang dilakukan tentang penggunaan games di kelas menunjukkan bahwa permainan yang diterapkan tidak cocok untuk kelas tersebut. Salah satu masalah yang teramati adalah bahwa games yang digunakan membutuhkan banyak waktu untuk dipersiapkan dan hanya memungkinkan sejumlah kecil siswa untuk berbicara. Penelitian ini bertujuan untuk meningkatkan proses penggunaan games untuk mengajar berbicara dengan melakukan penelitian tindakan kelas partisipatif di salah satu sekolah di Bandung. Proses penelitian mengikuti langkah-langkah: Perencanaan, Pelaksanaan, Pengamatan, dan Refleksi. Ada dua set instrumen yang akan digunakan dalam penelitian ini, daftar pengamatan peneliti dan kuesioner guru. Para siswa diberikan pre-tes dan post-tes untuk mengetahui peningkatan keterampilan para siswa. Hasil penelitian menunjukkan bahwa permainan 'Who am I' cocok dengan kebutuhan kelas dan memenuhi kriteria teori-teori permainan berbicara yang baik setelah diberikan beberapa modifikasi. Hasil uji t-tes pada skor siswa menunjukkan bahwa peningkatan yang dilakukan adalah signifikan dalam setiap siklus. Setiap aspek dari keterampilan berbicara siswa juga membuat peningkatan signifikan dengan t_obt_crit.
Evaluasi Implementasi Sistem Penerimaan Peserta Didik Baru (PPDB) di Kota Balikpapan, Indonesia
Authors: Darya I Gusti Putu 
Published: February 2021

Kementrian Pendidikan dan Kebudayaan (Kemendikbud) telah mengumumkan sistem yang digunakan untuk program Pendaftaran Peserta Didik Baru (PPDB) 2019. Melalui Permendikbud Nomor 51 Tahun 2018, prinsip yang dikedepankan dalam Penerimaan Peserta Didik Baru (PPDB) adalah nondiskriminatif, objektif, transparan, akuntabel, dan berkeadilan untuk mendorong peningkatan akses layanan pendidikan. Ada empat peraturan sistem zonasi baru dalam PPDB 2019, yaitu: (a). Penghapusan surat keterangan tidak mampu (SKTM). (b). Domisili lama (c). Pengumuman kapasitas. (d). Prioritas salah satu zonasi sekolah asli. Survei ini bertujuan untuk membuat mengevaluasi implementasi sistem penerimaan peserta didik baru online pada jenjang pendidikan yang meliputi Sekolah Dasar (SD) dan Sekolah Menengah Pertama (SMP). Sesuuai dengan petunjuk teknis Sistem PPDB nomor 420/937/SKT/V/2019. Pada kajian ini diambil sampel sebanyak 26 jenjang pendidikan Sekolah Dasar (SD) dan 23 pada jenjang pendidikan Sekolah Menengah Pertama.(SMP). Disarankan ke depan perlu lebih banyak sosialisasi, dalam rangka keterbukaan, manfaatkan media sosial yang mudah diakses masyarakat, software yang digunakan masih terkendala jaringan perlu dipersiapkan lebih baik lagi, dan waktu pelaksanaan bisa lebih lama sehingga tidak terjadi kepanikan masyarakat untuk mencari sekolah.
Feedback Mahasiswa Penerima Bidikmisi Universitas Papua dalam Kegiatan Kompetisi Sains, Teknologi dan Seni Budaya di Manokwari Papua Barat
Authors: Iyai Deny Anjelus , Siburian Rima H , Runtuboi Ferawati , Yenusi Kaleb , Noviyanti Noviyanti , Sinon Iriwi , Orisu Lily , Arwam Hendrik , Sudjatno Djoko , Darma Darma , Tulalesy Quin , Maker Ursula , Peday Hans , Saragih Desni T. R. , Nurhayati Dwi , Widayati Isti , Seseray Daniel 
Published: February 2021

Kegiatan bidikmisi adalah sarana pembinaan karakter anak bangsa. Kesiapan generasi anak bangsa akan menentukan kesiapan negara dalam bersaing di era milenial. Kegiatan bidikmisi dilaksanakan di kampus Universitas Papua yang diikuti oleh mahasiswa penerima bidikmisi dari 12 Fakultas di Unipa. Sebanyak 193 mahasiswa terlibat dalam memberikan respon melalui survey online yang disiapkan panitia. (1) Kompetisi Sains yaitu Lomba penulisan artikel ilmiah popular; (2) Pameran Budaya yaitu Cultural Attraction; (3) Kontes karya cipta sains, teknologi dan seni. Analisis data dilakukan menggunakan program angket dalam program Google Forms. Data hasil kajian ditampilkan dalam bentuk grafik yang disajikan secara proporsional (persentase %). Hasil penelitian menunjukkan bahwa peserta lebih banyak memberikan respon pada kegiatan atraksi budaya (84 mahasiswa) dan stand-up comedy (84 mahasiswa). Sementara penulisan artikel ilmiah paling sedikit mendapatkan feedback dari mahasiswa yaitu hanya 18 orang mahasiswa. Ditemukan mahasiswa sangat puas 28.6% diikuti dengan 24% cukup puas dan hanya 1% tidak puas. Kegiatan Teknologi, karya Sastra, Sains dan Seni, diketahui 52.1% sangat puas diikuti 2.6% cukup puas dan hanya 2.1% tidak puas. Untuk kegiatan stand-up comedy, 57.8% sangat puas, 25% cukup puas dan hanya sebagian kecil mahasiswa tidak puas 2.1%. Disimpulkan mahasiswa Unipa sangat puas dalam mengikuti kegiatan pembinaan. Ada asas manfaat, pembinaan karakter, independensi, rasa percaya diri, mampu beraktualisasi ide, gagasan dan talenta.
Conditions for Creditors to Exercise Special Rights during Reorganization
Authors: Kuznetsov A. A. 
Published: February 2021

The business reorganization regulation has traditionally been associated with creditor’s rights protection. The main difficulty in this case lies in the fact that in attempts to provide comprehensive protection of creditors to prevent them from losing the main thing for which the reorganization is needed—in fact, to enable enterprises to adapt to changing economic conditions—because in the presence of excessively burdensome rules, entrepreneurs will not be able or not want to take advantage of such a legal regime. In other words, any law and order is forced to seek a balance between the interests of reorganized entities and creditors. The Russian doctrine is largely isolated from the European tradition and focuses on the discussion of private issues of the application of Russian rules and lacks clear conceptual guidelines for development of these very rules. Special rights that the creditor has in connection with the reorganization of the company constitute the basis for the protection of the creditor’s legitimate interests. The shortcomings of domestic rules give rise to practical problems in the implementation of reorganizations. The creditor’s exercise of special rights during reorganization creates many risks for the company. In this regard, all legal orders impose restrictions on creditors exercising their rights. The paper discusses expedient restrictions of such rights on the basis of the European doctrine.The author concludes that each law and order has developed its own restrictions regarding the circle of creditors protected during reorganization. Concurrently, from the point of view of the previously considered rationale for the protection of creditors the only restrictions we can justify are the restrictions on the exercise of special rights in the event of reorganization of those creditors whose obligations arose after the reorganization started (disclosure of information about reorganization), as well as creditors who have other means of protecting their legitimate interests (for example, a counter-non-performance objection or the right to demand termination of the contract).