bluuebunny/crossref_metadata_2025 huggingface dataset:
Study Analysis of Serum Phosphorylated Tau (P-Tau) Levels with Severity and Outcome in Traumatic Brain Injury Patients: A Single Center Observational Study at Dr. M. Djamil General Hospital, Padang, Indonesia
Authors: Istiqomah  , Syafrita Yuliarni , Fanny Adhy Putri  , Syarif Indra  , Restu Susanti  , Reno Bestari
Published: June 2024

Background: Traumatic brain injury (TBI) is a global health problem that can cause death and disability in people of productive age. The diagnosis and assessment of TBI severity currently still rely on clinical examination and neuroimaging. However, limited access and cost of neuroimaging are obstacles in many health facilities. Therefore, blood-based biomarkers are needed that can help the diagnosis and prognosis of TBI. Phosphorylated Tau (p-tau) is a potential biomarker that can be measured in serum. This study aims to assess the relationship between serum p-tau levels and severity and outcome in TBI patients.
Methods: This research is a comparative study with a cross-sectional design involving 70 TBI patients who came to the emergency room (ER) of Dr. M. Djamil General Hospital Padang. TBI severity was assessed using the Glasgow coma scale (GCS) and grouped into mild (GCS 13-15) and moderate to severe (GCS 3-12). Outcomes were assessed using the Glasgow outcome scale (GOS) and grouped into good (GOS 4-5) and poor (GOS 1-3). Serum p-tau levels were measured using the ELISA method. Data analysis was carried out using SPSS.
Results: The median serum p-tau level in the mild TBI group was 165.84 ng/L (IQR 126.18-463.85), while in the moderate to severe TBI group, it was 177.68 ng/L (IQR 87.62-591 .93). There was a significant difference between serum p-tau levels in the mild and moderate to severe TBI groups (p=0.029). The median serum p-tau level in the good outcome group was 167.21 ng/L (IQR 87.62-463.85), while in the poor outcome group it was 187.04 ng/L (IQR 137.75-591.93). There was a significant difference between serum p-tau levels in the good and bad outcome groups (p=0.014).
Conclusion: Serum p-tau levels have a significant relationship with severity and outcome in TBI patients. Elevated serum p-tau levels are associated with increased severity of TBI and poor outcomes. Further research is needed to confirm these findings and explore the potential of p-tau as a biomarker in TBI management.
Evaluation of Hypochlorite Concentration in Household Bleaches as Colour Removal Agent on Coloured Cotton Fabrics
Authors: Adeboye Adebiyi Oladipupo , Goriola Olajide Rahman , Falode Christopher Gabriel , Ogunduyile Sunday Roberts , Eromosele Catherine Oluyemisi
Published: June 2024

Bleaches are known to remove stains from fabric. This study evaluates chlorine-based household bleaches as effective fabric colour removal agents and was conducted in the Chemistry and Textile laboratories of the Federal University of Agriculture, Abeokuta using experimental design. Five common household bleaches were collected from markets in study areas. The concentrations of Sodium hypochlorite in each bleach sample as indicated by the manufacturer were: A (3.85%), B (3.5%), C (not available), D (4.3%) and E (5.3%). To confirm the concentration of sodium hypochlorite in each bleach sample, Redox titration was conducted. One-minute Spot Test was used to determine the time taken for each bleach sample to remove colour (black, brown, navy blue, purple and army-green) from fabrics samples and similar test conducted with pure sodium hypochlorite (7.21% Chlorine) as control. The L*a*b* values for fabric colour change were obtained from images of the fabric samples using Fiji-Image J and Corel Photo-Paint 17.  The laboratory analysis and evaluation revealed the concentration of hypochlorite in the bleaches samples as A: 0.36% (3.56 g/dm3), B: 3.5% (34.00g/dm3), C: 1.15% (11.48g/dm3), D: 4.29% (42.92g/dm3), and E: 0.06% (0.57g/dm3); therefore, established the information on bleaches B and D product package. The average time (seconds) to remove colour from fabric samples by bleach samples were A- 80.37; B- 19.60; C- 30.36; D- 20.10; E- no vivid colour change after 120.00 sec while colour change was obtained 7.00 sec by the control. Furthermore, Image J analysis and L*a*b* values show colour changes on fabric samples with Bleach B ((x ̅= 75.74) and D ((x) ̅= 61.22) most effective in colour removals.  In conclusion, Chlorine base household bleaches containing above 1.0% V/v hypochlorite are suitable colour removal agents on coloured fabrics and not stain removals only. Consumers must be careful how to handle Chlorine household bleaches and coloured fabrics
Exploring Affordances of Online and Offline Strategies for Continuity of Learning in Secondary Schools during Pandemics: Lessons from Uganda's Response to the COVID-19 Pandemic
Authors: Namulondo Veronica , Najjuma Rovincer , Kasirye Gillian K. , Walimbwa Michael
Published: June 2024

The COVID-19 pandemic led to widespread school closures, disrupting learning in institutions worldwide. This study examined the online and offline strategies implemented in Uganda's secondary schools during the pandemic and draws lessons from the country's response. This study was conducted in two schools in Kampala District, the research employed a qualitative multiple case study approach, gathering data through interviews, observations, and focus group discussions. The findings revealed that both online and offline strategies played significant roles in facilitating home-based learning. Printed learning materials, such as textbooks and workbooks, were valued by teachers and students for providing a sense of continuity in their studies. However, limitations such as the lack of immediate clarification and two-way communication were identified. Logistical challenges in distributing the materials also posed difficulties, particularly for students in remote areas. Radio broadcasts emerged as a pivotal offline strategy for reaching students without internet access. Parents and students appreciated the insightful educational content delivered through radio programs, even in remote areas. However, accessibility concerns and the lack of interactivity were highlighted as limitations. These findings are not only pertinent for Uganda but also contribute to the global conversation on resilient educational systems in times of unforeseen disruptions. It is crucial to address the limitations of online and offline strategies to ensure equitable access and effective learning experiences for all students, especially those in remote areas
Relationship between Nurses' Therapeutic Communication and Family Anxiety Level of Patients Experiencing Emergency Conditions
Authors: Nugroho Kristianto , Auliya Novisa Ismi
Published: June 2024

Introduction: One of the nursing actions to overcome anxiety problems is to carry out therapeutic communication. With the existence of therapeutic communication, nurses can help clients and families understand better through verbal and non-verbal communication. However, there is often a gap between good communication theory and communication practice, leading to gaps in the field. The study wanted to determine the relationship between the nurse's therapeutic communication and the anxiety level of the patient's family experiencing emergency conditions.Methods: This study employed a cross-sectional and descriptive correlational research design with a sample size of 50 respondents using purposive sampling.Results: The results showed a relationship between nurses' therapeutic communication and the anxiety level of patients' families experiencing emergency conditions, with a p-value of 0.003. The results of this study indicated that most of the nurses' therapeutic communication was good (96%), and the patient's family anxiety level was mild (88%).Conclusion: Good therapeutic communication by nurses can reduce family anxiety.
The Descriptions of Parents with Children Suffering from Cancer during Encountering Emergency Situation: A Qualitative Descriptive Study
Authors: Putri Fitria Mahardika , Nugroho Kristianto , Victoria Arlies Zenitha
Published: June 2024

Introduction: Cancer is a chronic disease caused by abnormal cell growth in the body and can affect all ages, including children. Children with cancer are very vulnerable because they experience growth and development, so they need special attention, especially in emergencies, to avoid death and complications. This study aimed to describe parents' perceptions of having children with cancer when the child is in a crisis. Methods: This research design used a qualitative descriptive approach. This study's population was parents with cancer children with sampling using purposive sampling. Data collection through in-depth interview techniques (in-depth interview) using a recorder, field notes, and interview guidelines. Research data in conversation transcripts were analyzed using Colaizzi's method.Result: Five themes developed, including 1) the participant's understanding of the emergency in pediatric cancer, 2) efforts made by participants in caring for children with cancer, 3) participants' experience in managing and treating children with cancer, 4) challenges in treatment, and 5) participants' expectations in the treatment carried out by their children. The experience obtained by participants is a feeling of fear of worsening the situation and negative thoughts that arise & impact the participants' psychology. In addition, the challenges experienced by participants are the cost of traveling the distance between health facilities and residence. Behind it all, participants hope their children will recover from cancer.Conclusion: There is a lack of understanding of parents regarding emergencies in cancer; behind that, there are efforts made, such as efforts to treat children with cancer, struggles to care for children with cancer, and spiritual aspects.
Analysis of The Implementation of Countermeasure Policies Against Stunting
Authors: Ardilla Arista , Zulkarnaini Zulkarnaini , Utaminingsih Eka , Irafadillah Effendi Desy , Vita Sari Dian , Fatmawati Fatmawati
Published: June 2024

Introduction: Stunting is a major nutrition problem worldwide, especially in poor and developing countries. This problem leads to children's suboptimal brain, mental, and cognitive development. The stunting rate globally was 32.6% in 2000, and by 2017, around 150.8 million people were suffering from malnutrition and stunting. This research aims to determine the implementation of stunting prevention policies in the Puskesmas (Public Health Centre) Blang Cut working area.Methods: The research used a qualitative method with a descriptive approach to analyze the implementation of countermeasure policies to reduce stunting. The Health Belief Model was used as the theoretical framework. The methodological orientation of this research was discourse analysis. The study used an interview guide and a voice recorder to collect information from 9 informants.Results: Puskesmas Blang Cut has implemented several countermeasure policies to reduce stunting. These include increasing awareness about the importance of proper nutrition and hygiene, training healthcare workers on stunting prevention, and monitoring children's growth regularly. Implementing these policies has led to a significant reduction in the prevalence of stunting. However, some challenges still need to be addressed, such as increasing access to healthcare services and improving the quality of healthcare facilities.Conclusion: Communication factors related to implementing Countermeasure Policies in Stunting Reduction have been running well. The puskesmas has carried out all stunting reduction program activities, but the more dominant one is the Supplementary Feeding Program for those affected by stunting.
Influence of High-Fidelity Manikin-Based Simulation on Nursing Students' Basic Cardiac Life Support Ability and Motivation
Authors: Ni Luh Putu Inca Buntari Agustini  , I Putu Budiarsana  , I Kadek Artawan  , Only Hufana  , Dewi Ni Putu Ayu Ratna
Published: June 2024

Introduction: One of the competencies that nursing students must have while dealing with cardiac arrest is the capacity to perform critical life support, namely basic cardiac life support (BCLS). Having the abilities and motivation to perform BCLS is a complex process and often goes beyond the planned laboratory session's timeframe. The study wanted to determine the intervention’s impact on nursing students' ability and motivation to conduct BCLS. Methods: This study employed a quasi-experimental design with a pre-post-test control group and was carried out in July 2023 at the Emergency Skills Lab with fourth-year undergraduate nursing students. In this study, the sample size for the control and intervention groups was 52 for each group, selected using a simple random sampling technique. The independent variable was high-fidelity manikin-based human patient simulation based on Kolb's experiential learning theory, while the dependent variables were BCLS abilities measured using a mega code checklist and student motivation measured using a valid and reliable motivation questionnaire. Data were examined using the independent sample t-test. Results: The independent t-test results for the motivation variable showed a significant difference (p = 0.004), indicating a significant difference in motivation among students before and after being exposed to high-fidelity manikin-based human patient simulation based on Kolb's experiential learning theory in performing BCLS. Conclusion: High-fidelity manikin-based Human Patient Simulation is an educational paradigm in healthcare that involves using manikins that closely resemble real patients in realistic scenarios. It can be used as an alternative teaching method to boost BCLS performance and motivation.
الحرب النفسية عند الصليبيين ومقاومة المسلمين لها (489-648هـ/1096-1250م)
Authors: محمود وشاح غسان , عمرو أبو عمارة محمد
Published: June 2024

تناول البحث استخدام الصليبيين للحرب النفسية أثناء غزوهم للعالم الإسلامي  ومقاومة المسلمين لها حيث تم تقسيم الدراسة إلى ثلاثة مباحث رئيسة، الأول تناول الحرب النفسية الحديثة ووسائلها وطرقها وأنواعها وتناول المبحث الثاني ممارسة الصليبيين للحرب النفسية ووسائلهم ونتائج ذلك على العالم الإسلامي وأما المبحث الثالث فقد ناقش مقاومة المسلمين للحرب النفسية ووسائلهم وأثار ذلك.
Determination of Some Metal Concentrations in Plankton of Engineering and Built Environment Lake Faculty - UKM, Bangi - Malaysia during 2019
Authors: Saber.A. Shelmani Khaled , I Mushrifah.I , A. Tayeb Y.A , R. Taher & Afaf
Published: June 2024

A study of metal concentrations in plankton of Engineering and Built Environment Lake Faculty - UKM, Selangor, Peninsular Malaysia was conducted in January, April, July, and October 2019. Mixed plankton (phytoplankton and zooplankton) was collected randomly at different locations from the water lake by using 240 µm plankton net and these samples were pooled together. After cleaning the plankton samples were washed with tap water followed by distilled water and filtered by 0.45 µm membrane filters. Six metals i.e. cadmium, chromium, lead, nickel, zinc, and copper were determined in the plankton of the lake. The metals concentration were determined by Inductively Coupled Plasma Mass Spectrometer (ICP –MS), Perkin Elmer Elan, Model 9000. Furthermore, metals concentration in plankton for Zn,Cu,Cr,Ni,Pb and Cd were (6.30,4.70,2.47,2.40,0.52 and 0.06) respectively.
الضغوط النفسية وعلاقتها بالكفاءة الذاتية المدركة لدى معلمي ومعلمات المرحلة الثانوية بمدينة سلوق
Authors: ناصر احمد بوعين أ. الناجح , أحمد شیهوب ابراهیم د. إیمان
Published: June 2024

ھدف الدراسة إلى التعرف على كل من درجة الضغوط النفسیة والكفاءة الذاتیة المدركة لدى معلمین ومعلمات المرحلة الثانویة بمدینة سلوق والعلاقة بینھما تبعا لمتغیرات النوع، والمؤھل العلمي، وتم استخدام المنھج الوصفي ألارتباطي، واستخدام مقیاس الضغوط النفسیة والكفاءة الذاتیة المدركة من أعداد الفاخوري (2018م) وتم عرض المقياس على مجموعة من المحكمین من ذو الاختصاص والخبرة، حیث تم تطبیقه على عینة الدراسة المكون من (46) معلماً ومعلمة (10 ذكور - 36 إناث) ممن یعملون في مدارس المرحلة الثانویة بمدینة سلوق. وأظھرت نتائج الدراسة وجود درجة متوسطة من الضغوط النفسیة ودرجة منخفضة للكفاءة الذاتیة المدركة لدى معلمین ومعلمات المرحلة الثانویة بمدینة سلوق، ووجود علاقة طردیة ضعیفة غیر دالة إحصائيا بین الضغوط النفسیة والكفاءة الذاتیة المدركة بالإضافة لعدم وجود فروق ذات دلالة إحصائية في متوسطات درجة الضغوط النفسیة لدى معلمین ومعلمات المرحلة الثانویة تبعا لمتغیرات النوع، المؤھل العلمي. ویتضح من النتائج أيضا عدم وجود فروق ذات دلالة إحصائية في متوسطات درجة الكفاءة الذاتیة المدركة لدى معلمین ومعلمات المرحلة الثانویة تبعا لمتغیرات النوع، المؤھل العلمي، وتم مناقشة نتائج الدراسة وتقدیم عدد من التوصیات أھمھا: القیام بدراسات أوسع وأشمل من ھذه الدراسة، عقد ورشات عمل للتدریب على استراتیجیات مواجھة الضغوط النفسیة، وأسالیب رفع درجة الكفاءة الذاتیة، والتقلیل من آثار الضغوط النفسیة التي یتعرض لھا معلمین ومعلمات المرحلة الثانویة، والعمل على توفیر كل ما یساعد المعلمین والمعلمات على تحقیق الأھداف التعلیمیة.
The Franchise Devouring Itself: A Critical Analysis of the Marvel Cinematic Universe’s Reflexive Turn
Authors: Sebastián Martín Miguel
Published: June 2024

This article proposes that a "reflexive turn," which is particularly visible in some of the MCU's new streaming series, has taken place with the beginning of the franchise's Phase Four, the first phase of the new Multiverse Saga. Taking the first seasons of She-Hulk, What If...?, WandaVision and Loki as illustrations, my analytic focus falls on the reflexive devices and the narrative structures of these four series, which together seem to have established the grounds for a recurring metafictional allegory whereby the diegetic multiverse is made analogous to the franchise's own "multiverse" of complexly interrelated narratives. Thus seen, my interpretation of each of the series pays special attention to how reflexivity has allowed the MCU to speak about itself in this transitional moment, in a way that ambivalently reflects not only about the franchise's continuing dominance within the contemporary culture industry, but also about fears and concerns that the franchise's power may not last very long if it loses its narrative coherence along the way. It is in this sense that the Marvel Cinematic Universe seems to have started devouring itself, turning into a kind of "narcissistic" and "autophagic" narrative precisely at the time when it is beginning to generate a sense of exhaustion and saturation among its fans and followers. Although the reflexive elements of these four series acknowledge this sentiment in ways that approximate self-parody and self-critique, in the end they all arrive at the cynical and/or conformist conclusion that, for better or for worse, there is no alternative to the franchise's planned continuation.
Peran Kepolisian Dalam Meminimalisir Kekerasan Seksual Studi Kasus Polres Gorontalo
Authors: Andi Andi esse jumriani , Sri Sri Rahayu Lestari , Amili Halisma Amili , Gubali Agustina Gubali , Hasan Yeti S. Hasan
Published: June 2024

Penelitian ini bertujuan untuk mengetahui upaya-upaya yang dilakukan oleh Polres Gorontalo dalam meminimalisasi trjadinya kekerasan seksual terhadap anak. Penelitian ini menggunakan metode penelitian hukum empiris, yang dilakukan dengan cara menggunakan data-data melalui pengamatan langsung di lapangan. Penelitian ini menunjukkan bahwa upaya penanggulanggan kejahatan khususnya kekerasan seksual terhadap anak di Kabupaten Gororntalo adalah upaya preventif dan upaya represif. Berdasarkan hasil penelitian dan Analisa penulis merekomendasikan bahwa: Unit PPA Polres Gorontalo diharapkan mempertahankan kinerjannya agar anak-anak yang menjadi korban kekerasan seksual terhadap perlindungan yang efektif dan untuk lebih meningkatkan sosialisasi kepada masyarakat dan apparat penegak hukum mengenai kasus kekerasan seksual pada anak dan melakukan penyuluhan atau sosialisasi oleh para penegak hukum yang dilakukan secara berkala dan tepatsasaran.
Pembelajaran Sains Tentang Penanaman Konsep Benda Terapung, Tenggelam Dan Melayang Pada Kelompok B Ra Al Munawwaroh Ponorogo
Authors: Nurtina Irsad Rusdiani  , Betty Yulia Wulansari
Published: June 2024

The introduction of science learning is very important for us, especially in early childhood. Science learning for early childhood prioritizes process rather than results. By getting science learning children can think concretely and systematically, with science children can understand the concept of cause and effect that occurs in the surrounding environment both the natural environment or the social environment, children can expand their knowledge, can facilitate children's desires, increase children's interest in study the natural surroundings and provide provisions for the life to come. This study used a descriptive qualitative method, conducted at RA AL Munawwaroh Ponorogo. From the results of the research conducted, it was found that science learning must use experimental activities so that children can see and pay attention directly to the changes that occur in the learning. Items used for science learning must be concrete objects that are easy for children to find in their environment. Planting science concepts, one of which is sinking, floating and floating objects in early childhood. A floating object is an object in a state of equilibrium and is affected by the action of two forces, namely the weight of the object and the buoyant force, which is equal to the weight of the liquid. Mattress is when the volume of the liquid is equal to the volume of the object. An object sinks when the mass of the object is greater than the density of the liquid.
El acuerdo de Escazú y su importancia para Panamá
Authors: Alvarado Raisa
Published: June 2024

El Acuerdo Regional sobre Acceso a la Información, la Participación Pública y el Acceso a la Justicia en Asuntos Ambientales en América Latina y el Caribe más conocido como el Acuerdo de Escazú adoptado en Escazú, Costa Rica en el 2018, tiene como objetivo garantizar la implementación plena y efectiva en América Latina y el Caribe de los “derechos de acceso a la información ambiental, participación pública en los procesos de toma de decisiones ambientales y acceso a la justicia en asuntos ambientales así como la creación y el fortalecimiento de las capacidades y la cooperación”. Siendo América Latina y el Caribe una de las regiones a nivel mundial con menor cantidad de mecanismos de transparencia y acceso a la información ambiental donde se registran más delitos contra las personas defensoras del medio ambiente. También establece la protección de los derechos humanos de las personas defensoras del medio ambiente, medida que refleja los desafíos a los que se enfrentan en América Latina y el Caribe.
Riesgos toxicológicos por la exposición al metacrilato de metilo en trabajadoras de salones de belleza
Authors: Acosta C. Carolina D. , Arauz Maclaud Josué Xavier , Castillo Yoselin , Madrid Milisa M.
Published: June 2024

El propósito de este artículo fue evaluar los riesgos toxicológicos asociados a la exposición al metacrilato de metilo en trabajadoras de salones de belleza en Panamá Oeste. Para ello, se realizó una revisión exhaustiva de la literatura científica sobre esta problemática. Los estudios revisados mostraron una alta prevalencia de exposición al metacrilato de metilo entre los trabajadores de salones de belleza, principalmente durante la aplicación y remoción de uñas acrílicas. Esto se ha asociado con diversos efectos adversos en la salud, como irritación respiratoria, tos, sibilancias, asma ocupacional y dermatitis de contacto. Los niveles de exposición ocupacional han superado con frecuencia los límites recomendados. Los autores concluyen que es fundamental realizar un estudio en Panamá Oeste para cuantificar los niveles de exposición, evaluar en detalle los efectos respiratorios y utilizar biomarcadores, a fin de informar el desarrollo de estrategias efectivas de control y prevención en este sector laboral. Para efectos de este artículo la línea de investigación es salud pública y prevención, del área de salud ocupacional y el eje temático: salud laboral.
El impacto de los ‘Influencers’ y las redes sociales en la formación de identidad de la juventud panameña
Authors: Vargas Nathaly , Kirsch Ana
Published: June 2024

El presente artículo es producto de un proyecto de investigación que se encuentra en desarrollo y se enmarca en el paradigma empírico analítico, utilizando un diseño de investigación de tipo observacional y correlacional. La investigación se centra en analizar en qué medida los “influencers” y las redes sociales impactan en la formación de la identidad de la juventud panameña, así como en comprender los procesos mediante los cuales esta influencia se lleva a cabo. La muestra seleccionada para este estudio está compuesta por jóvenes panameños de 12 a 21 años, quienes serán elegidos de manera aleatoria estratificada por edad, género y ubicación geográfica en la Ciudad de Panamá. Esta estrategia de muestreo garantiza la representatividad de la muestra y permite obtener una visión amplia y diversa de cómo los jóvenes de diferentes perfiles demográficos están siendo influenciados por los “Influencers” y las redes sociales en la formación de su identidad.
Impacto económico-ambiental generado de las actividades mineras en Panamá
Authors: Bernal Juan , Vega Renny , Zapata Ivette , Acevedo Eliana
Published: June 2024

La minería es una actividad que ha tenido un fuerte impacto económico en Panamá, pero también ha dejado una huella significativa en el medio ambiente, esta investigación tiene como objetivo general evaluar el impacto económico-ambiental proveniente de las actividades mineras en Panamá. Para alcanzar este objetivo, se ha empleado una metodología cuantitativa con diseño transeccional exploratorio, los cuales permitieron recopilar y analizar un conjunto de datos económicos y ambientales relevantes, incluyendo indicadores clave, relacionados con el crecimiento económico y el empleo generado por la industria minera. Además, se analizaron los impactos en la biodiversidad, como afecta la actividad minera en la salud pública de las comunidades y profundizar en los ciclos mineros y los tipos de explotaciones que se realizan en el país. Los resultados que surgen de esta investigación ofrecen una perspectiva sobre la minería y la formulación de políticas asociadas al desarrollo sostenible del país, su impacto tanto a la economía como al medio ambiente en Panamá. Este enfoque equilibrado entre el crecimiento económico y la preservación del medio ambiente promoverá un futuro más sostenible y próspero para el país y su población.
Edad al Primer Parto de la Raza Holstein Friesian en el Ecuador
Authors: Carrillo Álvarez Israel , Cartuche Macas Luis , Chacón Marcheco Edilberto , Ortuño Barba Carlos , Guevara Viera Guillermo
Published: June 2024

El objetivo de este trabajo fue determinar la edad al primer parto en vacas Holstein Friesian. Distribuidas en su mayoría en la región sierra a una altura que va hasta los 3,800 metros sobre el nivel del mar. La base de datos incluyó: identificación del animal, fecha de nacimiento, fecha de primer parto y ubicación geográfica del predio. En total se obtuvieron 94,163 registros de primer parto entre el período 1971-2019. Como criterio de inclusión se consideró todas las vacas con partos entre 22 y 34 meses primer parto. En Ecuador la edad promedio fue de 48 meses en el año 1971 con un importante descenso de 35-41 meses entre el año 1972-1975 y 30-35 meses entre los años 1976-2018 consolidándose entre 23-29 meses en el año 2019. Paralelamente se demuestra variabilidad entre las categorías alta en relación a la de baja con 15.1 días de diferencia en la región costa mientras que en la región oriente es de 15.69 días y de 13.82 días de diferencia en la región sierra.  Este es el primer trabajo realizado en Ecuador, en el que se establece una reducción sostenida de la edad primer parto.
Periodización de dinámicas expansivas de ciudades intermedias. El caso de Río Grande (Argentina) entre los siglos XIX-XXI
Authors: Finck Nadia
Published: June 2024

Las ciudades intermedias, tanto en Argentina como a nivel global, tienen un peso significativo en términos cuantitativos y en relación con la población que concentran. No obstante, esto no encuentra necesariamente un correlato en el plano académico, aunque recientemente están creciendo los estudios y perspectivas que abordan este tipo de ciudades. El trabajo busca aportar a las discusiones sobre el estudio de las ciudades intermedias en el caso argentino y, en particular, los procesos expansivos urbanos. En el cruce disciplinar entre el campo de la geografía y los estudios urbanos, se propone un abordaje teórico-metodológico que incorpora la construcción de una periodización, entendida como herramienta para explicar este tipo de fenómenos en clave de ensamblajes espaciales y a partir del andamiaje conceptual construido sobre las ideas de territorio y lógicas de producción social del espacio urbano.
Migración peruana en el Área Metropolitana de Buenos Aires. Reflexiones a partir del desarrollo de una tesis doctoral
Authors: Lapenda Marina Laura
Published: June 2024

El artículo expone un análisis derivado de la elaboración de una tesis doctoral sobre la migración peruana. Pretende una mirada introspectiva, a fin de poner en valor las etapas que posibilitaron la recolección de datos, para su estudio. Ello habilita nuevas reflexiones sobre la posición del investigador, y de los sujetos migrantes, como también permite redescubrir la importancia de las técnicas utilizadas para abordar una próxima problemática de estudio. En este caso, los recorridos urbanos fueron esenciales para reconocer lugares peruanos en el Área Metropolitana de Buenos Aires, como también advertir su evolución. Su conjunto, da cuenta de los territorios de la peruanidad en la metrópolis. Por otra parte, las entrevistas en profundidad acercaron a comprender a la migración desde la voz de los actores, quienes construían su cotidianidad sustanciada por el ensamblaje de vivencias, imaginarios, relaciones y significados entre el Perú y la Argentina.
Índice de Pobreza Energética Multidimensional Ponderado. Caracterización de la provincia de Buenos Aires, por partidos
Authors: Viñuela Javier , Chévez Pedro , Martini Irene , San Juan Gustavo Alberto
Published: June 2024

El artículo expone los fundamentos, la metodología y los resultados alcanzados en la construcción de un Índice de Pobreza Energética Multidimensional Ponderado (IPEMP), para la provincia de Buenos Aires, Argentina. El IPEMP, propone un método de cálculo para la ponderación de variables, a partir de las cuales se evalúan niveles de criticidad respecto a características socioeconómicas, energéticas y constructivas de los hogares de estudio. Su aplicación sobre la base de datos censales expone la situación respecto a la pobreza energética, donde se destaca la criticidad en los partidos que conforman los sectores del Área Metropolitana de Buenos Aires (AMBA), centro y sureste de la provincia de Buenos Aires.
Effect of Cavity Geometry and Location on Base Pressure in a Suddenly Expanded Flow at Mach 2.0 for Area Ratio 3.24
Authors: Farhana Nur Danisyah Mohd Anuar  , Fharukh Ahmed Ghasi Mahaboobali  , Ambareen khan  , Mohammad Nishat Akhtar  , Sher Afghan Khan
Published: June 2024

The primary goal of this study is to use CFD analysis to investigate the impact that a cavity has on the pressure at the base of a structure. In this analysis, we took into account the NPR, the cavity aspect ratio, and the cavity position. In this case, the area ratio is 3.24 and the Mach number is 2.0. Simulations were run with L/D ratios between 1 and 6, and NPRs of 3, 5, 7.8, 9, and 12. The 2-dimensional model was developed using ANSYS Fluent's Design Modeler. The nozzle is operating at Mach 2.0. Base pressure and wall pressure in the duct were the primary research foci. The C-D nozzle was created for this research. ANSYS Fluent was used to verify the CFD findings. When the nozzles are under-expanded and the cavity is at 0.5D, passive control as a cavity is shown to be effective. It appears that 1D is the bare minimum for duct length. Because the shear layer gets reattached to the duct wall at 1D and the boundary layer grows after reattachment, passive control is not observed in the flow process regardless of whether the cavity is located at 1D, 1.5D, 2D, or 3D. An oscillating base pressure is seen at shorter duct lengths. This phenomenon does not occur at longer duct lengths. Whether or not there are cavities in the duct, the flow field is the same.
Data Collection and Data Management Approach for Developing a Driving Cycle: A Review
Authors: Nurru Anida Ibrahim  , Arunkumar Subramaniam  , Siti Norbakyah Jabar  , Salisa Abdul Rahman
Published: June 2024

Driving cycles were first proposed and developed for standard emission measurements used by legislative bodies to approve newly developed vehicles. There are many driving cycles that have been developed over the past few years. Most of the research on driving cycles is based on the condition of the vehicle in a specific location, such as the United States FTP75, European ECE 15, Japan 10115, and others. A driving cycle is a representative speed-time profile that reflects the typical driving pattern of a given city or region. A driving cycle consists of a sequence of vehicle operating conditions (idle, acceleration, cruise, and deceleration). The basic methodologies to construct a driving cycle are route selection, data collection, and the development of the driving cycle. However, as far as we know, detailed reviews and in-depth discussions of data collection instruments and data management are rarely present. As a result, this paper reviews and discusses the recent data collection approach, as well as providing a thorough analysis of the mechanisms that they employ. Furthermore, the disadvantages and advantages of the reviewed mechanisms have also been discussed.
Swarm Optimisation to Model the Surface Roughness of an AISI 4340 Turning using the Hot Machining Process
Authors: Ismail Thamrin  , Amrifan Saladin Mohruni  , Irsyadi Yani  , Riman Sipahutar  , Zulkarnain Ali Leman
Published: June 2024

Given that surface roughness is used to determine product quality, it is a crucial consideration in turning machining. Moreover, it considerably affects the cost of machining. This study forecasts surface roughness values for AISI 304 stainless-steel hot lathe machining using the particle swarm optimisation (PSO) methodology. The workpiece is heated to 100, 150 or 200 degrees Celsius before being turned. Afterwards, the depth, speed and feeding rate of cutting are adjusted to determine the surface roughness of the workpiece. The feeding rate is determined to be the most considerable influence in raising the surface roughness value, followed by cutting depth, cutting speed and workpiece temperature. In terms of accuracy, empirical modelling performs better. The PSO methodology illustrates an effective and straightforward method that can be applied to calibrate different empirical machining models.
A A Novel Poly (vinylidene) Fluoride/TiO2/Spent Bleaching Earth for Enhancing Hydrophilic Hollow Fibre Membrane
Authors: Rhafiq Abdul Ghani  , Muthia Elma  , Aulia Rahma  , Zahratun Nisa
Published: June 2024

Nowadays, polymer as the raw material has been utilized in the development of Hollow Fibre (HF) membranes. PVDF is a commonly used for HF membrane material. However, it has hydrophobicity properties and lead membrane becomes low permeability and fouling. Therefore, to avoid these membranes problems, the incorporation of inorganic nanoparticles into PVDF membranes matrix is necessary to be applied for significantly improving PVDF membranes performance. This study investigates the characteristics and performance of PVDF-TiO2 HF membranes using spent bleaching earth (SBE) as a promising material from industrial waste as a renewable inorganic nanoparticle. This novel PVDF-TiO2-SBE HF membrane was fabricated using the subsequent steps: The preparation process incorporates SBE revival through solvent extraction and thermal treatment alongside the wet spinning technique for membrane fabrication. The Fourier transform infrared (FTIR) functional groups, scanning electron microscope (SEM) morphology, water contact angle and pure water flux performance were investigated to specifically understand the performance of this typical HF membranes. The IR results show that Si-O-Si groups were found in the membrane matrices due to the addition of SBE material. The addition of TiO2-SBE particles also indicate a sandwich (sponge-finger-like) morphological structure on the cross-sectional, a rough and porous surface structures. The hydrophilic properties of the HF membrane and pure water flux performance are determined by the composition of the TiO2-SBE mixture added as an additive material. The minimum contact angle found at 74.33°, while the water flux is 5.81 kg.m-2.h-1 on the identical HF membrane. Accordingly, this approach significantly enhances the properties of the pure PVDF HF membrane.
Performance Investigation of PEM Fuel Cell with Three-Pass Serpentine Flow Fields under Varying Operating Voltages
Authors: Kaoutar Kabouchi  , Mohamed Karim Ettouhami  , Hamid Mounir  , Khalid Elbikri
Published: June 2024

The fuel cells performance is significantly impacted by both design and operational factors. The effective distribution of reactants within the flow fields is facilitated by the design of the flow channels. Therefore, the geometry of the flow channels and the overall design of the flow field play a crucial role in determining the fuel cells performance. Among various flow field designs, the serpentine flow field demonstrates superior performance compared to others. In this research, a three-dimensional proton exchange membrane fuel cell model was developed and used to study the influence of three-pass serpentine flow field on cell performance across varying operating voltages (0.9 V, 0.7 V and 0.5 V). The purpose of this research is to simulate and evaluate the comportment of the three-pass serpentine flow channels configuration by analyzing several parameters such as channels velocity distribution, oxygen mole fraction, pressure distribution and electrolyte current density along the z-axis at the cathode under different operating voltages. Numerical simulations were conducted using the COMSOL Multiphysics software. Therefore, this software is used to solve numerically the complete three-dimensional model with the governing equations of charge conservation, species transport, momentum, and continuity. The obtained results indicate that among different operating voltages, the cell voltage of 0.5 V demonstrated the highest channels velocity distribution, pressure distribution, and electrolyte current density. Moreover, it is found that at an operating voltage of 0.5 V, there is an important decrease in oxygen concentrations indicating a significant oxygen consumption in the fuel cell which improves the overall efficiency. This work contributes valuable insights to the optimization of fuel cell performance, specifically highlighting the favorable outcomes associated with the three-pass serpentine flow field design at lower operating voltages
The Influence of Continuance Commitment on Job Satisfaction of Barangay Health Workers in Malaybalay City, Bukidnon
Authors: Lacerna Claire H. , Jamago, RM Maria Fe H. , Salem, RM Novelyn M. , Oloraza, RM Nanette J. , Llausas, RM Lynde Mae L. , Gicole, RM Darlin M. , Pulido, RM Maicel P. , Amaro, RM Mydee E.
Published: June 2024

This study examined the influence of organizational commitment on the job satisfaction among Barangay Health Workers (BHWs) in Malaybalay City, Bukidnon, calendar year 2022-2023. A total of 140 BHWs were selected through a simple random sampling. A survey questionnaire from Allen and Meyer (1990), and Taylor and Bowers (1972) were adapted and pilot-tested obtaining a Cronbach’s alpha of 0.838. Descriptive and inferential statistics such as frequency, percentage, mean, standard deviation, Pearson product-moment correlation, and simple linear regression were used to treat the data. Based from the data gathered, the demographic profile of the respondents revealed that majority of BHWs are aged between 31 to 35 years, females, high school graduates, and with a length of service between 11 to 15 years. The findings further showed that BHWs exhibit a remarkably very high level of attachment and commitment to their roles and responsibilities, attributed to their strong motivation, dedication, and passion to serve the community's health needs and very high job satisfaction. In addition, the test of correlation revealed that organizational commitment of BHWs had significant positive relationship with job satisfaction, thus the first null hypothesis was rejected. Meanwhile, the study’s regression analysis exhibited that continuance had a significant impact toward job satisfaction. This implied that they are committed that is why they are satisfied, apart from the norm that employees are satisfied that is why they are committed. This fact highlighted that BHWs feel that they will lose more when they leave their job than they will gain despite their meager honorarium. Hence, this research underscores the importance of fostering and sustaining organizational commitment among BHWs, as it directly influenced their job satisfaction and, ultimately, the quality of healthcare services provided to the community. It is worthy to note that policymakers and healthcare administrators may recognize the significance of these factors in supporting and retaining a dedicated and effective healthcare workforce at the grassroots level.
Formulation and Characterization of herbal Emulgel by using four Tradesman herb Tamarindus indica, Achyranthes aspera, Nyctanthes arbor-tristis, Syzygium cumini
Authors: Tiwari Pradyumn , Yadav Rani , Kushwah Divyanshi , Dwivedi Devansh , Sagar Sakshi , Bansal Ayushi , Pandey Sneha , Rajpoot Jeetendra , A. Chaudhuri
Published: June 2024

Topical drug administration is the localized administration of medication to any area of the body via the cutaneous, vaginal, ophthalmic, and rectal channels. Whether their skin is healthy or sick, they employ a wide variety of dermatological and cosmetic treatments on it. The synthesis and characterization of an herbal emulgel incorporating four traditional medicinal plants, namely Tamarindus indica, Achyranthes aspera, Nyctanthes arbor-tristis, and Syzygium cumini, are described. The emulgel formulation was prepared using a combination of natural emulsifiers and gelling agents to achieve stable emulsion and gel properties. The phytochemical analysis of the herbal extracts revealed the presence of bioactive compounds such as flavonoids, alkaloids, phenols, and tannins, known for their therapeutic effects. The emulgel was characterized for its physicochemical properties including pH, viscosity. Additionally, the emulgel was evaluated for its in vitro antioxidant activity using DPPH assay, Anti-microbial test by Escherichia coli and in vitro anti-inflammatory activity using the animal method. The results indicated that the herbal emulgel exhibited significant antioxidant and anti-inflammatory activities, attributed to the synergistic effects of the bioactive compounds present in the herbal extracts. Overall, the formulated herbal emulgel holds promise as a natural alternative for topical applications, offering antioxidant, antimicrobial and antiinflammatory benefits, which could potentially find applications in the pharmaceutical and cosmetic industries.
A REVIEW OF AQUATIC PLANT BIOMASS PRETREATMENT METHODS FOR BIOGAS PRODUCTION
Authors: Kazizova Zamira , Zagorskis Alvydas
Published: June 2024

The increasing global demand for renewable energy sources has led to interest in generating biogas from aquatic plant biomass. This research examines the pretreatment methods of biomass, aiming to enhance the efficiency of biogas production processes. The analysis presents mechanical, chemical, biological, or combined pretreatment techniques, assessing their respective advantages, limitations, and potential synergies. The review extends beyond individual methodologies to identify potential synergies or sequential applications that could maximize biogas production efficiency. This study ultimately facilitates moving the field forward, contributes to the transition to more sustainable energy solutions, identifies gaps in existing researches, paving the way for future investigations and combat to solve upcoming energy problems.
The Yarkovsky Effect on the Long-term Evolution of Binary Asteroids
Authors: Zhou 周 Wen-Han 文翰 , Vokrouhlický David , Kanamaru Masanori , Agrusa Harrison , Pravec Petr , Delbo Marco , Michel Patrick
Published: June 2024

We explore the Yarkovsky effect on small binary asteroids. While significant attention has been given to the binary YORP effect, the Yarkovsky effect is often overlooked. We develop an analytical model for the binary Yarkovsky effect, considering both the Yarkovsky–Schach and planetary Yarkovsky components, and verify it against thermophysical numerical simulations. We find that the Yarkovsky force could change the mutual orbit when the asteroid’s spin period is unequal to the orbital period. Our analysis predicts new evolutionary paths for binaries. For a prograde asynchronous secondary, the Yarkovsky force will migrate the satellite toward the location of the synchronous orbit on ∼100 kyr timescales, which could be faster than other synchronization processes such as YORP and tides. For retrograde secondaries, the Yarkovsky force always migrates the secondary outward, which could produce asteroid pairs with opposite spin poles. Satellites spinning faster than the Roche limit orbit period (e.g., from ∼4 hr to ∼10 hr) will migrate inward until they disrupt, reshape, or form a contact binary. We also predict a short-lived equilibrium state for asynchronous secondaries where the Yarkovsky force is balanced by tides. We provide calculations of the Yarkovsky-induced drift rate for known asynchronous binaries. If the NASA DART impact broke Dimorphos from synchronous rotation, we predict that Dimorphos’s orbit will shrink by

a

̇

∼

7

cm yr−1, which can be measured by the Hera mission. We also speculate that the Yarkovsky force may have synchronized the Dinkinesh–Selam system after a possible merger of Selam’s two lobes.
Gaia DR3 Data of Very Young Open Cluster NGC 6530: Distance and Evolutionary Stage of Selected Stars
Authors: Parthasarathy Mudumba
Published: June 2024

Gaia EDR3 and Gaia DR3 data of selected stars in the very young (1.5 million years old) open cluster NGC 6530 are presented. All the selected stars have very accurate Gaia DR3 distances. Most of the selected stars are very young B stars and several of them are young stellar objects. From the analysis of selected stars, the distance to NGC 6530 is found to be 1318 pc. The two very red stars VAJ 304 and 338 have little bit less proper motion than other members of the NGC 6530 and their Mv values are found to be −3.57 and −3.68 respectively. They are much brighter than K5 III RGB stars and less luminous than massive K5 red supergiants. It is likely VAJ 304 and VAJ 338 are not members of NGC 6530 they may be field K5 type AGB or post-AGB stars. Further study of these two stars is needed.
Heteropoda lebar sp. nov.: a new species from the highlands in Pahang State, Malaysia (Sparassidae, Heteropodinae) with a distinct sexual colour dimorphism
Authors: Chen Wenqin , Jäger Peter , Zhu Yang , Yu Long , Zhang He
Published: June 2024

The genus Heteropoda Latreille, 1804, is ranked as the second within the family Sparassidae Bertkau, 1872. Up to now, sixteen species of this genus have been described from Malaysia.

A new species of this genus in the highlands of Pahang State, Malaysia is described under the name of H. lebar sp. nov.. Individuals of the new species live in primary forests on forest floor, active in the night on the leaf litter.