bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tribological and Corrosion Behavior of Oxidized and Plasma Nitrided AISI 4140 Steel
Authors: Dalibón Eugenia L. , Brühl Sonia P. , Silva Cardenas Ignacio , Prieto Germán , Tuckart Walter 
Published: September 2023

Abstract
Medium alloy steels are used in several components in the industry where wear and corrosion resistance are required. Different treatments can be used to enhance the surface properties. In this work, the tribological and corrosion behavior of the nitrided and post-oxidized AISI 4140 steel was studied. The samples were plasma nitrided in a 25 %/75 % (N2/H2) gas mixture at 500°C for 15 h. They were oxidized in the same chamber for 1 h in a water steam atmosphere at 400°C. The microstructure of the nitrided and oxidized layer was analyzed using X-ray diffraction (XRD) and scanning electron microscopy. The pin-on-disk tests were performed according to ASTM G99-17, Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus, with a 6-mm diameter alumina ball as counterpart, a sliding distance of 500 m and 1,100 MPa of applied Hertzian pressure. Moreover, reciprocating sliding tests with a stroke length of 5 mm were performed using am AISI 52100 steel ball as a counterpart under a Hertzian pressure of 354 MPa in both dry and lubricated conditions. Salt spray tests following ASTM B117-19, Standard Practice for Operating Salt Spray (Fog) Apparatus, and electrochemical tests in sodium chloride were carried out to evaluate the corrosion behavior. The thickness was 0.5 μm and 3 μm for the oxide layer and the nitrided layer, respectively. Magnetite was detected by XRD. In the pin-on-disk tests conducted under high pressure, the nitrided + oxidized and only nitrided samples presented similar wear resistance. However, the oxide layer allowed a reduction in the friction coefficient in the first cycles with respect to the only nitrided sample in the sliding reciprocating test under low pressure. This behavior was observed in both the dry and lubricated conditions, but it was more noticeable in lubricated ones. Regarding the corrosion behavior, the nitrided + oxidized samples showed better corrosion resistance than the other samples in a chloride solution.
Larger and Denser: An Optimal Design for Surface Grids of EMG Electrodes to Identify Greater and More Representative Samples of Motor Units
Authors: Caillet Arnault H. , Avrillon Simon , Kundu Aritra , Yu Tianyi , Phillips Andrew T. M. , Modenese Luca , Farina Dario 
Published: September 2023

AbstractThe spinal motor neurons are the only neural cells whose individual activity can be noninvasively identified. This is usually done using grids of surface electromyographic (EMG) electrodes and source separation algorithms; an approach called EMG decomposition. In this study, we combined computational and experimental analyses to assess how the design parameters of grids of electrodes influence the number and the properties of the identified motor units. We first computed the percentage of motor units that could be theoretically discriminated within a pool of 200 simulated motor units when decomposing EMG signals recorded with grids of various sizes and interelectrode distances (IEDs). Increasing the density, the number of electrodes, and the size of the grids, increased the number of motor units that our decomposition algorithm could theoretically discriminate, i.e., up to 83.5% of the simulated pool (range across conditions: 30.5–83.5%). We then identified motor units from experimental EMG signals recorded in six participants with grids of various sizes (range: 2–36 cm2) and IED (range: 4–16 mm). The configuration with the largest number of electrodes and the shortest IED maximized the number of identified motor units (56 ± 14; range: 39–79) and the percentage of early recruited motor units within these samples (29 ± 14%). Finally, the number of identified motor units further increased with a prototyped grid of 256 electrodes and an IED of 2 mm. Taken together, our results showed that larger and denser surface grids of electrodes allow to identify a more representative pool of motor units than currently reported in experimental studies.
The use of an RP-HPLC-UV method for the analysis of oxcarbazepine in the presence of its preservatives; stability studies and application to human plasma samples
Authors: Fouad Ali , Abdelkhalek Ahmed S. , Elrefay Hisham , Batakoushy Hany A. , Soltan Moustafa K. 
Published: September 2023

AbstractA simple, sensitive, selective, accurate and precise method was developed and fully validated for determination of oxcarbazepine (OXC) in presence of their preservatives and determination of oxcarbazepine (OXC) in human plasma. A reversed phase liquid chromatography (RP-HPLC) with UV detection techniques were applied for separation and quantification of studied drug OXC. Successful separation of the drug from methyl paraben (M.P.), propyl paraben (P.P.) and potassium sorbate (P.ST.) was achieved on a Kromasil C18 column (5 μm particle size, pore size 300 Å, l × I.D. 250 × 4.6 mm). The mobile phase that contain aqueous 0.05M potassium dihydrogen phosphate buffer (pH 7): acetonitrile, (50: 50, %v/v). The method was linear over concentration ranges 5.0–50 μg mL−1 for OXC. Bioanalytical validation of the developed method was carried out according to US-FDA guidelines and revealed a good linear relations over a range of (5.0–50), (0.5–10), (0.05–0.15), and (1.0–10) μg mL−1 for OXC, M.P, P.P, and P.ST, respectively, with a correlation coefficient (R2) of more than 0.999. Limit of detection (LOD) were 1.15, 0.03, 0.01 and 0.04 μg mL−1 for OXC, M.P, P.P, and P.ST, respectively, Intra and inter-day precisions, calculated as percentage relative standard deviation (% RSD), were lower than 2.0%. The developed method can be applied for routine drug analysis, therapeutic drug monitoring and bioequivalence studies through the analysis of plasma samples taken from blood bank.
Molecular redox-active organic materials for electrochemical carbon capture
Authors: Seo Hyowon 
Published: September 2023

AbstractThis prospective is a forward-looking outlook for researchers investigating electrochemical carbon capture utilizing molecular redox-active organic materials, with the following objectives: (1) identifying the essential components of an electrochemical carbon capture system, (2) introducing design principles for the system utilizing redox-active organic materials, encompassing their physicochemical properties and other critical factors, (3) presenting representative examples, and (4) promoting further experimental and theoretical studies on the application of redox-active organic materials for electrochemical carbon capture.
Graphical abstract
Contribución al estudio del sorgo (Sorghum bicolor (L.) Moench) para nutrición humana
Authors: López Ortiz Norma Constanza , Tique Martha María , Pérez Lavalle Liliana del Socorro 
Published: September 2023

Objetivo: evaluar la composición química y la digestibilidad in-vitro del almidón del sorgo (Sorghum bicolor (L.) Moench) nativo y germinado, y elaborar pastas alimenticias con 10, 15, 20% de inclusión de harina de sorgo nativo. Materiales y métodos: a las semillas de sorgo forrajero, híbridos HF-895, se les determinó la composición proximal, almidón total y digestibilidad in-vitro del almidón. A las fracciones granulométricas de la harina de sorgo, se les analizó el contenido de proteína y almidón total. Las pastas fueron sometidas a pruebas de cocción. Resultados: la composición del sorgo nativo está dentro de los parámetros establecidos por la normatividad del sorgo para consumo humano. El proceso de germinación, redujo la humedad y grasa, y no produjo cambios significativos en el contenido de proteína, cenizas y fibra dietaria. La velocidad de hidrólisis del almidón fue superior en semillas germinadas. Se presentaron diferencias significativas respecto al contenido de proteína y
almidón de las fracciones granulométricas. Las pastas con inclusión del 10% presentaron el menor porcentaje de sólidos solubles. El índice de absorción de agua fue igual para todos los niveles de inclusión. Conclusión: los germinados y las pastas alimenticias con inclusión del 10% constituyen dos alternativas de uso del sorgo para alimentación humana.
Desarrollo de un cuestionario de frecuencia de consumo de alimentos y su comparación con registros de alimentos
Authors: Chinnock Anne 
Published: September 2023

Objetivo: desarrollar un cuestionario de frecuencia de consumo de alimentos (CFCA) y evaluar su habilidad para ordenar un grupo de adultos según su ingesta de nutrientes por medio de una comparación con registros de alimentos. Materiales y métodos: el estudio consistió en dos etapas. A) Elaboración de un CFCA. Un análisis de una base de datos de consumo de 60 adultos de comunidades del Valle Central de Costa Rica, identificó 10 grupos de alimentos que contribuyeron a la mayor parte de variación entre individuos en la ingesta de energía y nutrientes. Se elaboró un CFCA cuantitativo con 111 alimentos pertenecientes a los 10 grupos y que cubría 7 días. B) Se recolectaron datos por medio del CFCA y registros de 4 días en 52 adultos de una comunidad urbana de San José. Se compararon las ingestas de energía y nutrientes estimados por ambos métodos por medio de coeficientes de correlación de Pearson y la prueba t de Student. Resultados: las coeficientes de correlación de Pearson para 18 de los 22 nutrientes crudos fueron mayores a 0,4. El grado de asociación para las ingestas ajustadas por energía fue menor, debido a subestimación en la ingesta de energía por el CFCA. Conclusión: en comparación con el registro, el CFCA logró ordenar los adultos según su ingesta de nutrientes no ajustados por energía. Sin embargo, debido a una subestimación en la ingesta total de energía por el CFCA, las correlaciones para los valores ajustados por energía fueron más pobres. El CFCA requiere algunas modificaciones y su reproducibilidad y validez debe ser demostrado antes de poder utilizarlo en estudios epidemiológicos en Costa Rica.
El significado de la cocina en mujeres de clase media de Córdoba, Argentina. Una aproximación desde la teoría de las representaciones sociales.
Authors: Del Campo María Lis , Navarro Alicia 
Published: September 2023

Antecedentes: el estudio sociocultural de la cocina da cuenta de los motivos que orientan esta práctica y de relaciones sociales existentes. Objetivos: explorar las representaciones sociales sobre la cocina de mujeres de sectores medios de Córdoba, Argentina. Materiales y Métodos: estudio cualitativo y exploratorio. Se realizaron once entrevistas en profundidad, seleccionadas por muestreo intencional según criterio de máxima variedad de edades, nivel educativo, ocupación y situación familiar. Se identificaron elementos centrales y periféricos mediante indicadores discursivos. Resultados: los elementos centrales expresan la valoración de la cocina como una responsabilidad propia de la mujer respondiendo a cierta moral tradicional, expresada también en la obligación de constituirse en un "ser para otros", en permanente tensióncon elementos derivados de la inserción en el mercado laboral y los cuidados para mantenerse dentro de parámetros de delgadez y belleza. Estos contenidos requieren de nuevas lógicas para racionalizar tiempo, recursos y afectos. Conclusiones: se visualizó la categoría femenino/masculino como construcción sociocultural que hace referencia a conductas, expectativas y roles socialmente atribuidos a hombres y mujeres, así como la necesidad de considerar el medio cultural, el lugar en la estructura social, y las experiencias vividas cotidianamente para comprender el sentido otorgado a las prácticas alimentarias.
HUBUNGAN ANTARA SELF REGULATED LEARNING DAN KONFLIK PERAN PADA MAHASISWA PENGURUS UNIT KEGIATAN MAHASISWA (UKM) UNIVERSITAS NEGERI MALANG
Authors: Liza Nur , Farida Ika Andrini , Priyambodo Aji Bagus , Harsono Yudi Tri 
Published: August 2023

Abstract: Students are obliged to complete their studies, but this is easy because students have a lot of activities to do both academic and non-academic (extracurricular), so students who join the unit often experience role conflicts between students and academic activities. The purpose of this study was to describe self-regulated learning and the role conflict of student administrators of the student activity unit of the State University of Malang and to determine the relationship between self-regulated learning and the conflict of roles of student administrators of the Student Activity Unit of the State University of Malang. The type of this research is quantitative research with correlational research design. Data collection in this study used a combination sampling technique between cluster random sampling and incidental sampling which obtained a subject of 123 students. The instruments used in this study are the self-regulated learning scale from Eva (2018) and the role conflict scale based on the definition according to Greenhaus & Beutell. This study uses product moment correlation data analysis. From data analysis obtained correlation coefficient -0.207 with p 0.022 (p < 0.05). It is recommended that students who experience role conflict can do independent learning by planning activities, making priority scales, making fun strategies to maintain motivation.

Abstrak: Mahasiswa berkewajiban untuk menyelesaikan studinya, namun tidaklah mudah karena mahasiswa memiliki banyak aktivitas yang dilakukan baik aktivitas akademik maupun non akademik (ekstrakurikuler), sehingga mahasiswa yang mengikuti unit kegiatan mahasiswa sering mengalami konflik peran antara kegiatan organisasi dan kegiatan akademik. Tujuan penelitian ini adalah untuk mengetahui gambaran self regulated learning dan konflik peran mahasiswa pengurus unit kegiatan mahasiswa Universitas Negeri Malang serta mengetahui hubungan antara self regulated learning dan konflik peran mahasiswa pengurus Unit Kegiatan Mahasiswa Universitas Negeri Malang. Adapun jenis penelitian ini adalah penelitian kuantitatif dengan desain penelitian korelasioal. Pengambilan data pada penelitian ini menggunakan teknik sampling kombinasi antara cluster random sampling dan insidental sampling yang memperoleh subjek sebesar 123 mahasiswa. Instrumen yang digunakan dalam penelitian ini adalah skala self regulated learning dari Eva (2018) dan skala konflik peran yang berdasarkan definisi menurut Greenhaus & Beutell. Penelitian ini menggunakan analisis data korelasi product moment. Dari analisis data diperoleh koefisien korelasi -0,207 dengan p 0,022 (p < 0,05). Disarankan bagi mahasiswa yang mengalami konflik peran dapat melakukan self regulated learning dengan cara membuat perencanaan aktivitas, membuat skala prioritas, membuat strategi yang menyenangkan untuk mempertahankan motivasi.
Persepsi Investasi Bodong dalam Kehidupan Masyarakat
Authors: Naufaldi Rayhan Auliya , Noorrizki Rakhmaditya Dewi 
Published: August 2023

Abstract: Investment do not always give benefits. There are many factors person loses their money because of investment, Because the one who invests illegally which is referred to fraudulent investment. Fraudulent investments are investments where the origins of the profits from these activities are unclear or prohibited by the state. This is dangerous in the future for people's lives, because if fraudulent investment cases continue to occur, people will be reluctant to invest in the future. Therefore, the author created this article to look at the perspective of social psychology about why someone is exposed to fraudulent investment cases. Why people are reluctant to invest when they hear about fake investments? So that readers can understand a few things about fraudulent investments later. The method used in this study is a literature review, which the author looks for reading sources and understands the contents of these sources. And the results obtained are that people are easily deceived because of the correspondence bias, where people only pay attention to what is visible. Whereas in terms of perception, people tend to be reluctant to invest when they hear about fraudulent investment issues because of causal attribution, where people conclude that investing is the same as losing money because it happens to other people.
Abstrak: Investasi tidak selalu menguntungkan seseorang. Banyak faktor mengapa orang tersebut merugi karena investasi, salah satunya adalah karena ia berinvestasi secara ilegal atau biasa disebut dengan investasi bodong. Investasi bodong sederhananya adalah investasi yang asal usul keuntungan dari kegiatan tersebut tidak jelas ataupun dilarang oleh negara. Hal ini tentu berbahaya kedepannya bagi kehidupan masyarakat, karena apabila kasus investasi bodong terus terjadi maka masyarakat menjadi enggan untuk berinvestasi kedepannya. Oleh karena itu penulis membuat artikel ini untuk melihat perspektif psikologi sosial tentang mengapa seseorang terkena kasus investasi bodong? Mengapa ketika mendengar isu investasi bodong orang menjadi enggan untuk berinvestasi? Sehingga pembaca dapat memahami beberapa hal tentang investasi bodong nantinya. Metode yang digunakan pada penelitian ini adalah review literatur, dimana penulis mencari sumber bacaan dan memahami isi dari sumber tersebut yang kemudian dikembangkan dengan sumber lainnya. Dan hasil yang didapatkan adalah masyarakat mudah tertipu karena correspondence bias, dimana masyarakat hanya memperhatikan apa yang nampak saja. Sedangkan dalam hal persepsi, masyarakat cenderung enggan untuk berinvestasi ketika mendengar isu investasi bodong karena causal attribution, dimana masyarakat menyimpulkan investasi sama dengan merugi karena hal tersebut terjadi pada orang lain.
Strategi Mahasiswa/i Pengurus Organisasi dalam Mengatasi Ketidakberdayaan yang Dipelajari (Learned Helplessness)
Authors: Ramadhani Asyifa Mutiara , Nugraha I Made Iswara Prathama , Setia Luki Sosia , Azizah Mufidah Nurul , Avezahra Mutia Husna 
Published: August 2023

Abstract: The student organization is a forum located in the campus area with the aim of developing student soft skills. However, the reality found in the field shows that the helplessness that is learned due to the various pressures experienced by students can arise from the organizations that are involved. This research is about to examine the strategies used by student administrators of organizations against powerlessness. This research is qualitative by using phenomenological method. Collecting data in this study using interview and observation techniques. This study found that learned helplessness can be overcome by focusing on problems (psychology, asking for help, problem-solving planning, persistence, and time management) and emotions (calming, crying, positive meaning, me-time, and avoiding). There are several factors that influence the success of organizational management student strategies in overcoming learned helplessness, namely friends, family, and one's own abilities.

Abstrak: Organisasi mahasiswa merupakan suatu wadah yang berada di wilayah kampus dengan tujuan untuk mengembangkan softskill mahasiswa. Akan tetapi, kenyataan yang ditemukan di lapangan menunjukkan bahwa ketidakberdayaan yang dipelajari karena berbagai tekanan yang dialami oleh mahasiswa dapat muncul dari organisasi yang diikuti. Penelitian ini hendak mengkaji strategi yang dilakukan oleh mahasiswa pengurus organisasi terhadap ketidakberdayaan. Penelitian ini bersifat kualitatif dengan menggunakan metode fenomenologi. Pengumpulan data pada penelitian ini memanfaatkan teknik wawancara dan observasi. Penelitian ini menemukan bahwa ketidakberdayaan yang dipelajari dapat diatasi dengan terfokus pada masalah (keilmuan psikologi, meminta bantuan, perencanaan penyelesaian masalah, sikap gigih, dan manajemen waktu) dan emosi (tenang, menangis, pemaknaan positif, me-time, dan menghindar). Terdapat beberapa faktor yang memengaruhi keberhasilan strategi mahasiswa pengurus organisasi dalam mengatasi ketidakberdayaan yang dipelajari, yaitu teman, keluarga, dan kemampuan diri sendiri.
Big Five Personality Sebagai Prediktor Perilaku Mengonsumsi Minuman Beralkohol Pada Mahasiswa Di Kota Malang
Authors: Armalid Ikhwanul Ihsan , Nursadi Reza Aji , Chusniyah Tutut 
Published: August 2023

Abstract: The objectives of this study were 1) to describe the behavior of drinking alcoholic beverages in student drinking in Malang, 2) to determine the picture of the big five personality in student drinkers in Malang, 3) to determine whether the dimensions of the big five personality were predictors of behavior in consuming alcoholic beverages in Malang. This research is a predictive quantitative research using descriptive analysis and multiple linear regression on the student population drinking in the city of Malang. Research subjects were selected using purposive sampling as many as 123 people. The research instrument uses two scales, namely the AUDIT reliability scale of 0.891 with a validity of 0.576-0.897 and a reliability BFI-2-XS scale of 0.958 with a validity of 0.429-0.871. The results showed that the majority of students who had the behavior of consuming alcoholic beverages were at the medium level. Trait results on the big five personalities show low neuroticism, low extraversion, low openness, low agreeableness, and low conscientiousness. Based on the analysis, only neuroticism is a predictor of alcohol consumption behavior (R2 = 0,118; p < 0,05). Big five personality has a determination of 11.8% of drinking alcohol behavior and 88.2% of determination by other variables.

Abstrak: Tujuan penelitian ini adalah 1) untuk mengetahui gambaran perilaku mengonsumsi minuman beralkohol pada mahasiswa peminum di Kota Malang, 2) untuk mengetahui gambaran big five personality pada mahasiswa peminum di Kota Malang, 3) untuk mengetahui apakah dimensi big five personality merupakan prediktor perilaku mengonsumsi minuman beralkohol di Kota Malang. Penelitian ini merupakan penelitian kuantitatif prediktif menggunakan analisis deskriptif dan regresi linear berganda pada populasi mahasiswa peminum di Kota Malang. Pemilihan subjek menggunakan purposive sampling sebanyak 123 orang. Instrumen penelitian menggunakan dua skala yaitu skala AUDIT reliabilitas 0,891 dengan validitas 0,576- 0,897 dan skala BFI-2-XS reliabilitas 0,958 dengan validitas 0,429-0,871. Hasil penelitian menunjukkan mayoritas mahasiswa yang memiliki perilaku mengonsumsi minuman beralkohol berada ditingkat Sedang. Hasil trait pada big five personaliy menunjukkan neuroticism rendah, ekstraversion rendah, openness rendah, agreeableness rendah, dan conscientiousness rendah. H1 diterima yaitu big five personality merupakan prediktor perilaku mengonsumsi minuman beralkohol. Hasil analisis inferensial hanya neuroticism yang menjadi prediktor perilaku mengonsumsi minuman beralkohol (R2 = 0,118; p < 0,05). Big five personality memiliki determinasi pada perilaku mengonsumsi minuman beralkohol sebesar 11,8% dan 88,2% determinasi oleh variabel lain.