bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modeling of external cylindrical grinding process using T1 tool steel
Authors: Nguyen Tuan-Linh 
Published: May 2021

The selection of the optimal external cylindrical grinding conditions importantly contributes to increase of productivity and quality of the products. The external cylindrical grinding is a method of finishing machine elements surface with an indeterminate blade shape. External cylindrical grinding can process surfaces that require high gloss and precision, although it can also be used to remove large surplus stock. Therefore, multi objective optimization for the external cylindrical grinding process is a problem with high complexity. In this study, an experimental study was performed to improve the productivity and quality of grinding process. By using the experimental date, the surface roughness, cutting force, and vibrations were modeled. To achieve the minimum value of surface roughness and maximum value of material removal rate, the optimal values of external cylindrical grinding conditions were determined by using the combination of Genetic Algorithms (GAs) and weighting method. The optimum values of surface roughness and material removal rate are 0.510 μm and 5.906 mm2/s, respectively. The obtained optimal values of cutting parameters were a feed rate of 0.3 mm/rev, a workpiece speed of 188.1 rpm, a cutting depth of 0.015 mm, and a workpiece Rockwell hardness of 54.78 HRC. The optimal values of cutting parameters, and workpiece hardness were successfully verified by comparing of experimental and predicted results. The approach method of this study can be applied in industrial machining to improve the productivity and quality of the products in external cylindrical grinding process of the T1 tool steel
A new approach in the development and analysis of the landslide susceptibility map of the hillslopes of Bujumbura, Burundi
Authors: Kubwimana Desire , Brahim Lahsen Ait , Abdelouafi Abdellah 
Published: May 2021

As in other hilly and mountainous regions of the world, the hillslopes of Bujumbura are prone to landslides. In this area, landslides impact human lives and infrastructures. Despite the high landslide-induced damages, slope instabilities are less investigated. The aim of this research is to assess the landslide susceptibility using a probabilistic/statistical data modeling approach for predicting the initiation of future landslides. A spatial landslide inventory with their physical characteristics through interpretation of high-resolution optic imageries/aerial photos and intensive fieldwork are carried out. Base on in-depth field knowledge and green literature, let’s select potential landslide conditioning factors. A landslide inventory map with 568 landslides is produced. Out of the total of 568 landslide sites, 50 % of the data taken before the 2000s is used for training and the remaining 50 % (post-2000 events) were used for validation purposes. A landslide susceptibility map with an efficiency of 76 % to predict future slope failures is generated. The main landslides controlling factors in ascendant order are the density of drainage networks, the land use/cover, the lithology, the fault density, the slope angle, the curvature, the elevation, and the slope aspect. The causes of landslides support former regional studies which state that in the region, landslides are related to the geology with the high rapid weathering process in tropical environments, topography, and geodynamics. The susceptibility map will be a powerful decision-making tool for drawing up appropriate development plans in the hillslopes of Bujumbura with high demographic exposure. Such an approach will make it possible to mitigate the socio-economic impacts due to these land instabilities
Experimental implementation of thermal enhancement performance of air heat exchanger’s pipes utilizing unconventional turbulator
Authors: Ismaeel Ali Abdulwahab , Hussein Nassr Fadhil , Suffer Kadhim H. , Razlan Zuradzman M 
Published: May 2021

Heat exchangers are widely used in industry, however, raising their performance are important for the variety of applications. Consequently, efficiency improvement associated with low production cost is considered in this experimental work. The current study aims to enhance the rate of heat transfer in pipe-type heat exchangers experimentally by using a novel nozzle as a turbulator. The cross-sectional shape of the nozzle is hexagonal, and the diameter ratio DR is equal to 0.5. Constant heat flux was maintained in the vicinity of the section of the test tube, while the working fluid was pumped into the open system at six discrete Reynolds number values ranging from 6000 to 19500. To investigate the effect of distance among the pieces, three turbulators with different numbers were assigned and named as (N=4, 5 and 6). The results indicated an increase of 172 %, 194 % and 216 % of the heat transfer rate for cases 4, 5 and 6 respectively comparing to the benchmark tube. On the other hand, the friction factor values increased remarkably due to the inserting of turbulators by about of 722.9 % for N=4, 823.9 % for N=5 and 886.7 % for N=6 compared to a plain tube case. Moreover, it has been established that with the insertion of 6 pieces two enhancements was observed; heat transfer rate and thermal performance, where, thermal performance of all cases exceeds unity (maximum thermal performance of 1.62 has been obtained by inserting 6 pieces of hexagonal nozzles turbulators). A comparison with another types of vortex generators shows the gap between the turbulator and heated surface offers a solution for problems occurred in the pipes of heat exchanger. The study therefore suggests a wider practical implementation of the turbulators
Imaging and Clinical Features of Neurocutaneous Melanosis in the
Pediatric Population
Authors: Mormina Enricomaria , Granata Francesca , Vinci Sergio Lucio , Coglitore Alessandra , Caragliano Antonio Armando , Tessitore Agostino , Longo Marcello , Visalli Carmela 
Published: May 2021

Background:
Neurocutaneous Melanosis (NCM) is a rare nonfamilial phakomatosis
characterized by the presence of congenital melanocytic nevi and abnormal melanocyte infiltration
of the leptomeninges.

Objective & Methods:
This paper shows the importance of early diagnosis and the most important
imaging features of the disease on CT and MR scans. PubMed database was searched from January
1972 to September 2020. Papers including imaging findings of NCM, clinical, follow-up, and
treatment features were collected, selecting only 89 studies.

Discussion:
NCM is a term used for the first time by van Bogaert in 1948. It refers to a condition
caused by an error during morphogenesis and migration leading to leptomeningeal melanocytic accumulation.
Although histological findings are the gold standard for diagnosis confirmation, neuroimaging
and clinical features strongly support the suspect of NCM. Localization and extension of
the lesions are predictive of neurological manifestations related to increased intracranial pressure,
mass lesions, or spinal cord compression. CT demonstrates sites of increased density in the anterior
temporal lobe, mainly the amygdala, thalami, cerebellum, and frontal lobes base. However, MRI is
the best imaging method to diagnose central nervous system lesions, often appearing as T1-short
signal areas of the cerebral parenchyma, indicative of central nervous system melanosis. MRI can
also reveal associated intracranial and intraspinal abnormalities.

Conclusion:
Early imaging, when available, is helpful if NCM suspect is raised and may be of guidance
in comparing later studies. NCM requires a multidisciplinary approach since it is a multisystem
disease with a genetic component.
Biologically Active Phytochemicals: A Brief Appraisal
Authors: Mahajan Ayush , Rana Pulkit , Singh Dilpreet , Singh Kuldeep 
Published: May 2021

Aim/Objective:
Phytochemicals are considered an ideal candidate for the production of
anticancer drugs due to their pleiotropic activity on multi-mode target events.

Materials And Methods:
Plants are ideal reservoirs for new chemical entities and provide a promising
cancer research line. Cancer cells can be formed through different types of mutations, including
Point mutation, DNA amplification, chromosomal rearrangement, Epigenetic mutation.

Results And Discussion:
Products derived from plants are a groundbreaking area because they are
eco-friendly, low-cost, Easy, simple, safer, and less toxic compared to other methods of treatment.
Vincristine, vinblastine, paclitaxel, camptothecin, cryptolepine, and its analogues, berberine,
Antofine, curcumin, ginsenoside, fisetin, chelerythrine, chelidonine, clivorine, clathrodin, dibromophakellstatin,
etc are some potential phytochemicals.

Conclusion:
The review provides in-depth details of structure, properties, mechanism of action and
potential anti-cancer activity of phytochemicals derived from plant sources.
Pelatihan Teknik Komunikasi bagi Kader Jumantik untuk Meningkatkan Peran sebagai Edukator Masyarakat
Authors: Ernawati Kholis , Purwaningsih Endang , Poerwanto Eko , Caninsti Riselligia , Mardhiyah Dian 
Published: May 2021

Tugas kader jumantik selain sebagai pemantau jentik juga diharapkan sebagai edukator masyarakat. Masyarakat yang teredukasi diharapkan terlibat aktif sebagai jumantik mandiri di rumahnya masing-masing. Tujuan kegiatan ini adalah untuk meningkatkan peran kader jumantik sebagai edukator warga di Kelurahan Serdang melalui pelatihan teknik komunikasi. Sasaran kegiatan berjumlah 20 orang kader jumantik yang merupakan perwakilan dari setiap RW di Kelurahan Serdang. Pelatihan dilaksanakan pada 12 Februari 2019 di kampus Universitas YARSI. Media pelatihan yang digunakan adalah power point presentation (ppt), video, dan alat peraga. Pelatihan dilaksanakan dengan metode ceramah, role play, diskusi, dan praktik. Hasil pelatihan menunjukkan bahwa tingkat pengetahuan peserta meningkat, yaitu 75% (sebelum pelatihan) menjadi 90% (setelah pelatihan). Hasil analisis bivariate menunjukkan bahwa tidak ada perbedaan signifikan pada tingkat pengetahuan kader jumantik tentang teknik komunikasi pre dan post pelatihan ( ). Dalam pelatihan teknik komunikasi bagi kader jumantik perlu digunakan metode lain agar berpengaruh secara signifikan terhadap peningkatan pengetahuan peran kader. Selain itu, juga perlu dilakukan kegiatan pelatihan teknik komunikasi untuk semua kader jumantik serta pelatihan lanjutan bagi kader jumantik yang telah mengikuti pelatihan sebelumnya. Pelatihan-pelatihan tersebut bertujuan untuk meningkatkan keterampilan komunikasi kader jumantik dengan metode praktik langsung, yaitu sebagai edukator masyarakat di wilayah tugas masing-masing.
Statistical Analysis and Trend Detection of the Hydrological Extremes in the Váh River at Liptovský Mikuláš
Authors: Mitková Veronika Bačová , Halmová Dana 
Published: May 2021

Abstract
Natural climate fluctuation, as well as expected climate change, brings additional water regimes in the flow of a number of serious issues and uncertainties. The upper parts of the river basins are suitable for studying the effect of potential climate change or increased air temperature on drainage conditions in the basin. The Váh River is the biggest left-side Danube River tributary and the second biggest river in Slovakia. Gauging station Váh – Liptovský Mikuláš is the final profile above the water reservoir Liptovská Mara, one of the largest reservoirs in Slovakia. The contribution deals with the trend analysis of the extreme flows regime and the waves volume belongs to the annual maximum flow at gauging station Váh – Liptovský Mikuláš in a selected time period (1931–2015). Consequently, the trend analyses of precipitation depth and air temperature have been made at three selected meteorological stations located in the upper part of the Váh River basin. We have used the Mann-Kendall nonparametric test, which is one of the most widely used nonparametric tests to detect significant trends in a time series.
Informal Sector and International Capital Movement: New Evidence from Some Petroleum Countries
Authors: Zeddam Ahmed Amine , Dahmani Mohamed Driouche , Hamrit Abdelatif 
Published: May 2021

Abstract
The main aim of this paper is to investigate the effect of the informal economy (IE) on foreign direct investment (FDI) in a sample of petroleum producing countries (Algeria, Norway, the Russian Federation, Saudi Arabia and United States) based on data covering the period of 1991–2018 and using the Non-linear Autoregressive Distribution Lag (NARDL) model. The NARDL model was built separately for each country in the study sample. The main finding of this study is the impact of IE size on FDI inflows in all of the countries in the study sample, even if they are all producing and exporting countries. The empirical results lead to distinguish between two sub-groups. The first sub-group consists of countries whose FDI inflows have been positively affected by positive and negative shocks in the IE. These countries are characterised by a high share of natural resources in their GDP. The second sub-group consists of countries whose inward FDI has been positively affected by negative shocks in the IE and negatively affected by the positive ones. The most common feature of this subgroup is the relative independence of economics from natural resources.
Preserving Engagement: Orientation amidst a Global Pandemic
Authors: Hughes Alison , Pearson Courtney , Ramos Lindsay , Tilley John , Mudd Leah , Ford Casey , Wallace Arnez 
Published: May 2021

When we met in November of 2019 to hold our annual orientation brainstorming session, our New Student & Family Programs (NSFP) staff dreamed of additional small groups, affinity group spaces, revamped evening programming, and increased opportunities for student connections. Four short months and many hours of planning/training later, we found ourselves in a similar brainstorming session. Except this time, it was late March, we were facing a global pandemic, and we had just shifted our orientation season completely online in response to COVID-19. Like most orientation, transition, and retention professionals around the world, we found ourselves devastated and overwhelmed. We had a very short turnaround time (18 days), but one thing was essential for us—we would preserve as much student/family engagement and interaction as possible.
In this article, we explore the decision-making process, methods, action steps, and considerations for implementing a virtual orientation that embraced student and familial engagement despite the global pandemic.
Converting a Dynamic in-Person Experience to Remote Life
Authors: Roybal Alicia , Waggoner Emilie , Heaton Christy , Moroney Emily , Hoff Nicole , Miles Kelsi , VanDijk Angela , Fukumoto Kristen 
Published: May 2021

This paper explores the work the Student Transitions and Family Engagement (STFE) team did to convert dynamic in-person experiences into virtual programs, advising, and courses. These opportunities were framed through the lenses of Academic and Social Integration (Tinto, 1975; Braxton et al., 2004), Belonging (Strayhorn, 2019), and Transition Theory (Schlossberg, 1981).
The COVID-19 pandemic caused disruptions in every sector of business and higher education and student affairs was not immune to these effects. The unprecedented disturbances to business-as-normal forced student affairs professionals to find innovative ways to welcome new students into their universities. This article details the monumental programmatic changes employed, as well as the challenges faced and lessons learned by the New Student Orientation and First-Year Experiences teams at the University of Colorado Denver. While catalyzed by unfortunate circumstances and necessity, many of the new ideas and methods developed during 2020 will be adopted as mainstays in STFE’s suite of operations and programmatic offerings.
SOSIALISASI UNMET NEED PASANGAN USIA SUBUR (PUS) DI KELURAHAN MAHARANI KECAMATAN RUMBAI KOTA PEKANBARU
Authors: Karlinah Nelly , Dwienda Octa , Ambarwati Novi , Nursilawati Nursilawati 
Published: May 2021

Unmet need adalah wanita usia subur yang berstatus kawin yang tidak ingin punya anak lagi atau ingin menjarangkan kehamilan tetapi tidak menggunakan kontrasepsi. Pemerintah bersama masyarakat bertanggung jawab untuk menjamin bahwa setiap ibu memiliki akses terhadap pelayanan kesehatan ibu yang berkualitas, mulai dari saat hamil, pertolongan persalinan dari tenaga medis terlatih dan perawatan pasca persalinan ibu, serta akses terhadap keluarga berencana. Berdasarkan hasil SDKI(2012) menunjukkan bahwa angka unmet needkontrasepsi di Indonesia sebesar 11,4%. Jumlah PUS yang ingin menunda kehamilan atau tidak menginginkan tambahan anak tetapi tidak ber KB meningkat dari 8,6% (2003) menjadi 9,1% (2007), dan kembali meningkat 11% di tahun 2012. Pada tahun 2012 jumlah unmet needKB menjadi tinggi dan mempengaruhi nilai Total Fertility Rate(TFR) meningkat sehingga pencapaian TFR 2,1 tidak tercapai. Unmet needKB selain sebagai pengaruh keberhasilan TFR juga menjadi pengaruh kegagalan program KB yang nantinya akan berlanjut menjadi tindakan populasi di Indonesia, untuk itu perlu adanya peningkatan pengetahuan melalui sosialisasi Unmeet Need. Sosialisasi Unmet Need ini dilaksanakan pada tanggal 24-27 Oktober 2019 di Kelurahan Maharani, Kec. Rumbai. Pengabdian Kepada Masyarakat ini bersumber dari dana DIPA STIKes Hang Tuah Pekanbaru. Hasil dari sosialisasi didapatkan meningkatnya pengetahuan pasangan usia subur (PUS) tentang Unmet Need.
Exótica
Authors: Bo Alessandro 
Published: May 2021

Todos buscan un paraíso, pero pocos saben que no existe…
EXÓTICA es un trabajo que reinterpreta los pasos de aventureros y exploradores que emprendieron complejas y peligrosas expediciones en los "territorios salvajes" de México a lo largo de los siglos XIX y XX. Estas travesías condujeron hacia nuevo conocimiento y descubrimientos documentados en valiosas crónicas y bitácoras que giraron al rededor del mundo. Habiendo nacido en México como la primera generación de inmigrantes europeos, encuentro una conexión con estas historias y de ahí la necesidad de apropiarme y reencarnar las vivencias de estos exploradores como la de mis ancestros, obsesionados por aventurarse a nuevos territorios como hacia lo desconocido y a la promesa de un posible paraíso…
Ekstraksi Mesiodens pada Anterior Maksila : Laporan Kasus
Authors: Sembiring Linda Sari , . Marcia 
Published: May 2021

Pendahuluan: Mesiodens merupakan salah satu variasi dari supernumerary teeth yaitu adanya gigi tambahan yang terletak pada garis tengah diantara kedua incisivus sentral. Mesiodens umumnya berukuran kecil, berbentuk conical atau peg shaped, dan dapat menyebabkan diastema. Prevalensi mesiodens ditemukan berkisar antara 0,15% - 3,9%. Mesiodens dianggap sebagai anomali gigi yang paling umum yang memengaruhi gigi permanen dan jarang ditemukan pada gigi sulung.
Kasus : Pasien laki-laki, usia 9 tahun, mengalami gigi berlebih pada gigi depan atas kanan dan menyebabkan giginya terlihat berjejal. Pemeriksaan intraoral menunjukkan anak dalam fase gigi campuran awal. Hubungan oklusi molar kiri Kelas II, molar kanan Kelas I, overbite sebesar 6 mm, overjet 7 mm dan terdapat crowding anterior maksila dan mandibula. Terdapat sisa akar pada gigi 52,53, karies profunda pada gigi 54,55,64,75,74,73,84,85, karies media pada gigi 83. Pemeriksaan radiograf periapikal menunjukkan terdapat mesiodens pada palatal gigi 11. Berdasarkan penilaian risiko karies menurut AAPD, pasien memiliki risiko karies tinggi.
Penatalaksanaan Kasus : Perawatan awal adalah ekstraksi sisa akar gigi 52 dan setelah 8 bulan kemudian dilakukan ekstraksi mesiodens.
Pembahasan : Mesiodens merupakan gigi supernumerary yang paling umum ditemukan. Terdapat sekitar 80% dari gigi supernumerary yang mengalami mesiodens. Etiologi mesiodens tidak diketahui secara pasti namun dapat disebabkan oleh faktor genetik, faktor lingkungan, kelainan perkembangan, dan hiperaktifitas dental lamina.
Simpulan : Perawatan mesiodens tergantung pada tipe, posisi serta efek potensial pada gigi yang berdekatan sehingga membutuhkan rencana perawatan yang komprehensif. Ekstraksi merupakan salah satu tindakan yang sering dilakukan dalam perawatan mesiodens.
The Effect of Alcoholic Beverages on Surface Roughness of Acrylic Denture Base Material
Authors: Rizki Gladis Aprilla , Rais Sri Wahyuningsih , Mozartha Martha 
Published: May 2021

Alcoholic beverages can be consumed in any group age, and it may be consumed by an individual using denture. Fluid absorption by heat-cured acrylic resin as a material of a denture base was able to cause an increase in its surface roughness. Absorption of an organic solvent such as the ethanol in an alcoholic beverage(s) could even increase the effect. This study aimed to evaluate the effect of alcohol beverages on surface roughness of heat-cured acrylic resin denture base. Samples (n=24) were prepared from heat-cured acrylic resin (25x25x5 mm). They were divided into 4 groups and the pre-test surface roughness was measured. Samples of each group were immersed for 10 minutes into the solution (distilled water as the control group, beer, wine, and whiskey as the test groups). After stored in artificial saliva for 23 hours, the samples were immersed into the solution, completing a period of 24 hours. This procedure was performed for 7 consecutive days and the post-test surface roughness was measured. Data were statistically analyzed using the Kruskal-Walis test. There was a significant difference in surface roughness measurement before and after the immersion (p<0.05). Whiskey was most affecting the surface roughness of heat-cured acrylic resin denture base. Alcoholic beverages could increase the surface roughness of heat cure acrylic resin denture base.
Keywords: Alcoholic beverages; Heat-cured acrylic denture base; Surface roughness
Pedagogí­a de géneros textuales para fomentar engagement en la escritura académica en educación superior
Authors: Bení­tez Velásquez Teresa de Jesús , Guariguata Yanuacelly , Pérez Adriana 
Published: May 2021

Este artí­culo presenta los resultados de un proyecto de Investigación-Acción de corte cualitativo, implementado en una de las asignaturas de formación básica en competencias comunicativas de la Universidad del Norte (Barranquilla-Colombia). El propósito es analizar la contribución de la Pedagogí­a de Géneros textuales y las estrategias de Aprendizaje activo en el engagement emocional y comportamental de los estudiantes, así­ como en su desempeño en las clases de escritura. En el estudio participaron 63 estudiantes. Los datos fueron recolectados a través de observaciones de clases, entrevistas, análisis de documentos y encuestas. Los resultados demostraron incremento en el engagement emocional y comportamental, evidenciado en una participación activa e involucramiento en las actividades, cumplimiento de tareas y compromisos, interés e interacción activa con docentes y pares durante las actividades. Asimismo, los textos de los estudiantes al final del semestre confirmaron apropiación de las caracterí­sticas genéricas, léxico-gramaticales y semántico-discursivas del género explicación factorial académico.
El Análisis de Errores como Evidencia de la Interlengua de los Estudiantes de Inglés como Lengua Extranjera
Authors: Victoria Pardo Marí­a 
Published: May 2021

Este artí­culo presenta el análisis de los tres primeros errores más comunes en la producción escrita del inglés como lengua extranjera (EFL) en un corpus de aprendices recolectado en la Universidad del Norte de Barranquilla, Colombia. El corpus fue recopilado siguiendo los parámetros de la lingüística de corpus computacional y la extracción de errores se hizo con software especializado en análisis lingí¼í­stico WordSmith Tools 5, Scott (2008) y Lancsbox, Brezina, McEnery, & Wattam (2015). El análisis se basó en la teorí­a de Corder, ( 1981) y James, (1998) sobre el análisis de errores (AE) y usando el etiquetador de la Universidad de Louvaina (Dagneaux et al., 2005a) para obtener resultados comparables con trabajos similares. De acuerdo con los resultados, los tres errores más relevantes en la escritura de estudiantes universitarios pertenecen a las categorí­as de Forma (FS), Gramática (G), y Léxico (LS)