bluuebunny/crossref_metadata_2025 huggingface dataset:
How to make electric vehicle traffic carbon–free
Authors: Lieven Theo
Published: April 2024

The increase in electromobility could help achieve the zero–carbon target for vehicle traffic by 2050. However, the use of electricity from CO2-containing sources such as coal, oil, or gas speaks against this. This is why e-mobility is sometimes called a deception. Extensive government subsidies for the purchase of e-mobiles are criticized because they do not or only inadequately fulfill their ultimate purpose, namely, the decarbonization of vehicle traffic. The new method of state e-mobility funding presented here proposes subsidizing fewer EV purchases but using the amount released to promote the expansion of renewable energies to the extent that sufficient clean electricity is available for every new electric vehicle. This will make vehicle traffic 100% carbon–free. An empirical study strongly suggested that this method increases the acceptance of e-mobility subsidies among the population.
A Graph based Recommendation Model for Short Video with Attention and Message Passing
Authors: Singh Thaddeus , Rousseau Liam , Delacroix Lucien
Published: April 2024

The rise of the Internet has revolutionized the way information is accessed and consumed, leading to an era characterized by data abundance and complexity. In this landscape, users are often inundated with numerous choices, creating a challenge known as information overload. To address this challenge, recommendation systems have emerged as indispensable tools across various online platforms. These systems, by analyzing user attributes and behaviors, aim to provide personalized recommendations, thus assisting users in navigating the vast array of available information. However, conventional recommendation algorithms often overlook valuable user-item features embedded in additional data sources such as review texts. Moreover, integrating auxiliary information to enhance recommendation accuracy adds complexity to the process. In light of these considerations, this paper introduces an interest-aware message passing recommendation model. By partitioning the graph into subgraphs based on user and item interactions, the model leverages graph convolution operations to learn node representations, thereby enhancing the expression of users' interests and preferences. Through empirical evaluation on benchmark datasets, our model outperforms existing baselines, demonstrating its efficacy in addressing the challenges of recommendation in the age of data abundance.
Attitudes Towards New Career Approaches among Working Students: A Comparative Analysis with Non-Student Employees
Authors: Ozturk Uygar , Yildirim Elvan
Published: April 2024

This research sought to explore the new career approaches of employed students. A comparative analysis was conducted with nonstudent employees to comprehensively grasp the novel career attitudes of working students. The neoliberal era has profoundly reshaped various disciplines, including economics, human resource management, and employment structures. Among these changes, career management has undergone a significant transformation. Conventional organisational careers have been supplanted by new approaches such as boundaryless, protean, subjective career success and kaleidoscope careers. These emerging career paradigms align with the emergence of novel forms of employment. Moreover, in an increasingly liberalised world, the rising costs of education and the growing prevalence of paid education are prompting students to enter the workforce while continuing their studies. The proliferation of companies offering part-time employment, such as private employment agencies, corresponds to an increase in students seeking part-time work. In other words, supply and demand within the part-time labour market intersect more robustly. Furthermore, working students gain valuable experience while employed, shaping the future supply of the labour market. Our research aims to assess the suitability of new career approaches for future workers and contributes to unravelling their complexities. The study also investigates whether employees are students and whether this affects their career approaches. To analyse this research, boundaryless career attitude and professional career attitude scales were utilised as assessment tools. These new career approaches represent innovation in careers. The research dataset comprised responses from 521 working students and 374 nonstudent employees, all of whom were actively employed in Istanbul, the most populous city in Turkey and home to many universities. The data analysis employed a quantitative research methodology using descriptive statistics, factor analysis, correlation analysis, and independent t tests. The findings revealed that working students exhibited significantly greater boundaryless career orientation, organisational mobility, boundaryless mindset, and value-driven career attitudes than did their nonstudent counterparts. The outcomes of this study will make a valuable contribution to the existing body of literature concerning employed students. Furthermore, the findings are anticipated to provide valuable insights into formulating and implementing human resources policies within organisations that engage in student employment practices. By shedding light on the experiences, challenges, and potential areas for improvement in this context, this research aims to inform and enhance the effectiveness of human resource strategies tailored toward working students.
From Chatbots to Mind-bots: Navigating Assessments in the Advent of ChatGPT
Authors:   Department of Family Medicine, Faculty of Medicine, Universiti Sultan Zainal Abidin, Terengganu, MALAYSIA, Ibrahim Mohd Salami , Mat Hassan Nurulhuda ,   Department of Family Medicine, Faculty of Medicine, Universiti Sultan Zainal Abidin, Terengganu, MALAYSIA
Published: April 2024

Recently, the authors had a situation in a mobile chat group (WhatsApp) when a medical lecturer was asking what value a human papillomavirus (HPV) test adds to the pap smear for cervical cancer screening. The field experts in the group replied with detailed, erudite explanations. Soon after, another lecturer posted an answer from GPT-3 based chatbot. Despite needing more depth of an expert’s reply, the chatbot gave concise answers, reframing complex medical jargon in plain English without losing crucial medical information, and more. They were easier to understand. All these with the leisure of a human-like engagement. This narration is one of countless news related to ChatGPT, which have been making headlines, academic journals included, to illustrate how the large language model technology may have disrupted conventional educational practice. One discriminatory element distinguishes this technology from all its predecessors; it is not trying to mimic a human response but responding like a human. In this writing, we navigate discussion based on the most fundamental aspect of assessment, its purpose. We revisit the concept of fidelity from the field of simulation to explain how the technology may have rejuvenated the purpose of assessment for learning (formative assessment). Then, we articulate several associated challenges in the conduct of the high-stake assessment of learning (summative assessment). We conclude with an emphasis on the purposes as the guiding principles that remain the same despite the changes in the landscape on the conduct of the assessment.
Effects of Electronic Dance Music on Academic Performance among Medical Students: A Narrative Review
Authors:   School of Medical Sciences, Universiti Sains Malaysia, Kelantan, MALAYSIA, Hau Koo Thai , Tee Vincent ,   School of Medical Sciences, Universiti Sains Malaysia, Kelantan, MALAYSIA, Kuan Garry ,   Exercise and Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, Kelantan, MALAYSIA
Published: April 2024

Music always influences how a person thinks and communicates with others. Research on the relationship between music and education has been growing for several years. Some scholars suggest that listening to music may improve cognitive capabilities, while others believe that it may slow down complicated brain processes. Electronic dance music (EDM) is a subgenre of electronic music originally composed for use in bars, clubs and other venues that include dance-based amusement. Some scholars argue that EDM is a music style that benefits our brain activities, particularly their cognitive aspects. However, the use of EDM to enhance academic performance among students is still not widely practised globally. Furthermore, research on EDM usage among medical students is rarely conducted. Hence, this study aims to investigate EDM as a learning tool and discover whether it is helpful in improving medical students’ academic achievement and overall growth. The study consists of a narrative review conducted according to the Scale for the Assessment of Narrative Review Articles (SANRA). Literature searches were performed in the databases of PubMed, ResearchGate, ScienceDirect and Google Scholar for the period between September 2012 and November 2022. The review revealed limited research on the use of EDM as an instrument to enhance academic performance among medical students. However, existing studies suggest that EDM may have cognitive benefits and positively influence brain activities, particularly in the cognitive domain. Although EDM is commonly associated with leisure and entertainment settings, its potential for learning remains underexplored in the context of medical education.
Medical Students’ Zoom Fatigue in a Thai Medical School During the COVID-19 Pandemic
Authors:   Faculty of Medicine, Prince of Songkla University, Songkhla, THAILAND, Sukhanonsawat Nattapong , Boonkwan Chutchol ,   Faculty of Medicine, Prince of Songkla University, Songkhla, THAILAND, Vattanavanit Veerapong ,   Critical Care Medicine Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, THAILAND
Published: April 2024

Public concern about an emerging phenomenon of exhaustion during online studies, known as “Zoom fatigue”, is growing. This study evaluated Zoom fatigue and undergraduate medical students’ perceptions of online lectures. This cross-sectional study was conducted at a medical school in southern Thailand from September to October 2022 and included voluntary participation of first- to third-year medical students. The perception of Zoom fatigue was evaluated using the Zoom Exhaustion and Fatigue (ZEF) scale on a five-point Likert scale. One hundred twenty-five students responded to the questionnaire. Most participants experienced moderate Zoom fatigue, with a mean composite ZEF score of 2.82. The women were associated with high Zoom fatigue [odds ratio (OR) 2.87; 95% confidence interval (CI); 1.29–6.37, p = 0.01]. The median concentration time for online lectures was 60 min. It was found that 81.6% (n = 102) of students disagreed that Zoom lectures provided more interaction with their teachers than traditional lectures. Almost all students (93.6%, n = 117) preferred to turn off their cameras during class. Nearly half of them (49.6%, n = 62) disagreed that online lectures were better than traditional ones, whereas 28.8% (n = 36) were unsure. Most students had neutral or negative perceptions of online lectures. Therefore, strategic interventions are necessary to prevent or mitigate fatigue during online lectures.
Assessing the role of meat consumption in human evolutionary changes. A review
Authors: Gorbunova N. A.
Published: April 2024

The historical study of changes in food patterns is an integral part of the study of biological and social adaptations during the formation and further development of Homo sapiens species. For quite a long time, diets have been considered the driving force of human evolution. Changes in the type of food consumed and the way it was obtained have been associated with encephalization and the emergence of bipedalism, as well as ecological, social and cultural evolution of hominins1 . Archaeological and paleontological evidence indicates that at least about 3 million years ago, hominins increased their meat consumption and developed the necessary fabricated stone tools, while their brains and bodies evolved for a novel foraging niche and expanded hunting grounds. Animalsource foods have always been an integral part of the human diet. However, the way they are obtained and processed changed dramatically during human evolution. Meat became a common food source when systematic hunting began using technologies and tools focused on killing animals and meat cutting, which reduced the time and effort spent on chewing food, and later, on its cooking. At some point after this, humans began to hunt together, which made it possible to obtain meat from big game, and as a result, develop the social and altruistic skills to distribute the prey between sexes and ages. The eating habits of our ancestors have been studied using a variety of methods, including anthropometry, the use of archaeological data, and isotope analysis of bones and teeth to determine trophic status. The adaptive biological significance of meat-eating, which played an important role in human evolution, was analyzed, including the “expensive tissue hypothesis” draw attention to the evolutionary forces responsible for the increase in hominin brain size. Furthermore, data on changes in human anatomy, digestion and metabolism are systematized, indicating an evolutionary dependence on and compatibility with significant meat consumption. At the same time, a number of changes in the human body are associated with the skill of using fire in cooking. Heat processing of food stimulated our ancestors to overcome the food specialization intrinsic to animals. The question of what is the right diet for the human species and what are the potential consequences of limiting meat consumption is briefly addressed.
INTEGRATING AI INTO THE FUTURE OF ACCOUNTANCY
Authors: Sarawat Anuya
Published: April 2024

Accountancy is the practice of recording, classifying and reporting on business transactions. It provides feedbackÂ’s to the management regarding the financial results and status of an organization. Accountancy revolves around recording and analyzing financial transactions to provide accurate financial position and performance of an entity. Accountancy is invaluable but it is not immune to the tide of advancements in artificial intelligence. Artificial intelligence can help reshape accountancy for the betterment of accountants and the business. In accountancy some tasks being repetitive and time consuming often divert accountants from high value activities. Artificial intelligence can save accountants from such routine work and help them enhance their skills. This Research paper will talk about how artificial intelligence can revolutionize accountancy.
“From the Series, I See that LGBTQ+ Characters are Ordinary People”: An Audience Study on Netflix Series with LGBTQ+ Themes in 2020–2022
Authors: Trisnawati Ririn Kurnia , Sari Tribuana , Hadiningrum Indriyati
Published: April 2024

The research focused on how the audience of gender-diverse series in Indonesia reacted to the LGBTQ+ themes broadcasted in some Netflix series aired from 2020 to 2022. It was interesting to discuss, considering that LGBTQ+ issues were still taboo, and that Indonesian society was known to be conventional and religious. By examining the audience’s reactions to the narration of LGBTQ+ themes, the research delved deeper into how Indonesian audience members problematize the LGBTQ+ issues in the Netflix series. The research was conducted with the qualitative research method by asking 70 participants, from whom validated informed consent was retrieved in advance, to answer the questions posed in the online questionnaire employed herein and by inviting them to join Zoom-mediated interviews. Three problematizations are found: Netflix’s ideology related to its LGBTQ+ content, audience perception about the LGBTQ+ community, and audience religiosity before and after watching such a series. There are also varying views on these problematizations according to the various manners in which audience members are reasoning, which are subsequently assigned to several clusters. Ultimately, such problematizations help shed light on how Netflix and its LGBTQ+ content is dynamically perceived by the audience.
Effect of Monosodium Glutamate in Artificial Food on Feed Utilization Efficiency, Growth, and Survival of Fingerling Tilapia (Oreochromis niloticus)
Authors: Indriati Dyah Ayu , Subandiyono Subandiyono , Windarto Seto
Published: April 2024

Tilapia (Oreochromis niloticus) is one of the leading freshwater fish commodities in Indonesia. The problem often faced by tilapia farmers is the low level of feed utilization, especially protein, which is still low, resulting in suboptimal growth. The glutamate content in monosodium glutamate (MSG) can act as a precursor for the formation of arginine and glutamine, which can increase the production of protease and lipase enzymes that are excreted into the intestines during the feed hydrolysis process, which is useful in increasing the absorption of nutrients in the form of protein and fat. This research was conducted using fingerling tilapia as a test fish with an average individual length of 6.59 ± 0.21 cm/fish and an average individual weight of 5.33 ± 0.27 g/fish. This research was carried out in an aquarium container measuring 40x30x30 cm with a water volume of 27 l and a density of 15 fish/aquarium. The aim of this research was to determine the effect of MSG in fish feed on total feed consumption (TKP), feed utilization efficiency (FUE), protein efficiency ratio (PER), protein retention, relative growth rate (RGR), and survival (SR) in fingerling tilapia. This research used an experimental method with a completely randomized design (CRD) of 4 treatments with 3 replications. Treatments A, B, C, and D are fed with the addition of 0 MSG in commercial feed; 0.75; 1.5; and 2.25 g/kg. Variables observed included TKP, FUE, PER, protein retention, RGR, and SR. The research results showed that MSG in feed had a significant effect (P < 0.05) on the FUE, PER, protein retention, and RGR values but had no effect (P < 0.05) on the TKP and SR values. FUE value; PER, protein retention; The highest RGR was obtained in treatment D (2.25 g/kg); FUE (87.21±2.28); PER(1.83±0.05); protein retention (50.47±0.76); The RGR (3.06 ± 0.03) and survival value for all treatments were found to be 100%. The water quality during the research was in optimal condition.
Strengthening of VANNAME (Litopenaeus vannamei) seeds that are preserved in cement seeds through the application of FITOIMUN®
Authors: Utama Ismail , Hardi Esti Handayani , Agustina Agustina , Sulistyawati Sulistyawati , Sumoharjo Sumoharjo
Published: April 2024

The purpose of this study was to evaluate the addition of FITOIMUN® made of acid shrimp extract (Solanum ferox) and key interviews (Boesenbergia pandurata) on survival, absolute weight growth, daily growth rate, feed conversion rate, and water quality parameters of the vandame shrimpsined in cement tanks. This study uses a complete random design (RAL) with 3 treatments and 3 repetitions. The doses of FITOIMUN® used in the treatment are 0 mL/kg (P0), 20 mL/kg (P1), and 24 mL (P2). The shell used is 20±0,5 g and is kept in a cement tank of 4.5 x 5.5 x 95 m2. The shrimp are treated with a feeding rate method with a frequency of four times a day. The results of the study show survival at P0, P1, and P2 doses of 100%. Absolute weight growth at P0 (7.41 g), P1 (7.69 g), and P2 (6.85 g). The daily growth rate is P0 (26.47%), P1 (27.48%), and P2 (24.46%), while feed conversion rates are P0 (1,16), P1, (1,14), and P2, respectively. (1,18). The water quality in this study averaged 26.92°C, pH 7.39, DO 6.33 ppm, and salinity 19.55 ppt. In conclusion, the survival rate with the administration of FITOIMUN® to shrimps in all treatments reached 100%; the application of Fitoimun® did not affect absolute weight growth, daily growth rate, or feed conversion rate but had the best value at P1 (20 mL/kg feed); and the water quality parameters in all treatments were still at the appropriate criteria for the life of the vaname shrimp.
Cosmetic Products in German-Language Online Advertising: Naming Methods and Patterns
Authors: Efremova Vladislava , Smirnova Anna
Published: April 2024

Advertising is constantly developing as it attempts to keep pace with the ever-changing reality. German producers of cosmetics advertise their brands in German-language online magazines, and these ads often reflect the current changes at the language level. The authors identified and described the current naming methods and patterns in online advertising of German cosmetic brands. The naming strategies followed the rapid global changes and adapted to the constantly emerging new cosmetic products. The most recent nominations proved to be structurally and semantically diverse. Along with the typical German word-formation, they demonstrated some novel methods, which indicated the most recent transformations in the language. The modern German cosmetic advertising is subject to the process of neologization. While each neoplasm adds to the linguistic expressiveness of the language in general, it increases the reader’s involvement in each particular ad. The neologisms were coined in line with German as well as English patterns while some were combinations of them both.
Design and Development of EcoSense: Android-Based Incentivized Environmental Campaign App
Authors: Rumapea Deddy Romnan , Tandrian Kenrick , Kurniawan Rivano Ardiyan Taufiq , Salsabila Mirsa , Ngoh Darren , Marwies Kenji , Aqid Bukhori Muhammad , Azurat Ade
Published: April 2024

This research paper presents the design and development of EcoSense, an Android-based incentivized environmental campaign app, using the Design Science Research Methodology (DSRM). The DSRM approach involved six steps: problem identification, objective definition, design and development, demonstration, and evaluation. The problem of insufficient participation in environmental activities in Indonesia was identified using the Five Whys method, and user requirements were collected through an online survey. Various design artifacts were created to ensure the app is user-friendly, and the app was evaluated based on user engagement and participation. The results suggested that the app has the potential to effectively engage users in environmental campaigns, as evidenced by the relatively high retention and conversion rates. The study has some limitations, such as a small sample size and limited evaluation metrics, but future research can address these limitations and expand on the findings.
Improving Classification Performance on Imbalanced Medical Data using Generative Adversarial Network
Authors: Siska Rahmadani  , Agus Subekti  , Haris Muhammad
Published: April 2024

In many real-world applications, the problem of data imbalance is a common challenge that significantly affects the performance of machine learning algorithms. Data imbalance means each target of classes is not balanced. This problem often appears in medical data, where the positive cases of a disease or condition are much fewer than the negative cases. In this paper, we propose to explore the oversampling-based Generative Adversarial Networks (GAN) method to improve the performance of the classification algorithm over imbalanced medical datasets. We expect that GAN will be able to learn the actual data distribution and generate synthetic samples that are similar to the original ones. We evaluate our proposed methods on several metrics: Recall, Precision, F1 score, AUC score, and FP rate. These metrics measure the ability of the classifier to correctly identify the minority class and reduce the false positives and false negatives. Our experimental results show that the application of GAN performs better than other methods in several metrics across datasets and can be used as an alternative method to improve the performance of the classification model on imbalanced medical data.
Improving the statistical downscaling performance of climatic parameters with convolutional neural networks
Authors: Hosseini Baghanam Aida , Nourani Vahid , Bejani Mohammad , Ke Chang-Qing
Published: April 2024

This study examines two downscaling techniques, convolutional neural networks (CNNs) and feedforward neural networks for predicting precipitation and temperature, alongside statistical downscaling as a benchmark model. The daily climate predictors were extracted from the European Center for Medium-range Weather Forecast (ECMWF) ERA5 dataset spanning from 1979 to 2010 for Tabriz city, located in the northwest of Iran. The biases in precipitation data of ERA5 predictors were corrected through the empirical quantile mapping method. Also, two nonlinear predictor screening methods, random forest and mutual information, were employed, alongside linear correlation coefficient. While these methods facilitate identification of dominant regional climate change drivers, it is essential to consider their limitations, such as sensitivity to parameter settings, assumptions about data relationships, potential biases in handling redundancy and correlation, challenges in generalizability across datasets, and computational complexity. Evaluation results indicated that CNN, when applied without predictor screening, achieves coefficient of determination of 0.98 for temperature and 0.71 for precipitation. Ultimately, future projections were employed under two shared socioeconomic pathways (SSPs), SSP2-4.5 and SSP5-8.5, and concluded that the most increase in temperature by 2.9 °C and decrease in precipitation by 3.5 mm may occur under SSP5-8.5.
Comparing the effect of carbon media on nutrient removal and greenhouse gas production in laboratory-scale bioreactors
Authors: Kohn Jacqueline , Seitz Vermeer Nicole E. , Villeneuve Janelle F. , Kadijk Mark , Xu Shanwei
Published: April 2024

The performance of locally available agricultural carbon media (barley straw and hemp straw) was compared to woodchips for removing nitrate (NO3-N) and orthophosphate (PO4-P) in up-flow laboratory bioreactors. These media were tested in three replicates to quantify variability. The production of greenhouse gases nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) were quantified. Influent water with NO3-N and PO4-P flowed continuously through bioreactors at a 4-h hydraulic retention time at 20 °C for 16 weeks. Nitrate removal reached up to 37% across all carbon media after the fifth week, with a removal rate of 64 g N m−3 d−1. Nitrate removal was affected by the type of carbon media in the order of barley straw > hemp straw > woodchips (P < 0.05). Most of the PO4-P rates declined rapidly after the first week for all carbon media meaning none were superior. Greenhouse gas production was dominated by CO2 with less CH4 and N2O produced. Production of N2O relative to nitrate removal for the three media remained low at 0.16 to 0.75%. The findings suggest that agricultural residues could perform better than woodchips for NO3-N removal although there was slightly higher N2O and CO2 production for these residues than woodchips.
Research on the purification effect of major pollutants in water by modular constructed wetlands with different filler combinations
Authors: Liu Xiaoting , Li Xuhao , Zhang Xiangling , Zhao Hui , Wang Chen , Zhu Hao , Xiao Xinlu , Cao Shilong , Liu Rang
Published: April 2024

Constructed wetland systems have been widely used in China due to their advantages of good treatment effect, low cost and environmental friendliness. However, traditional constructed wetlands have challenges in application such as deactivation due to filler clogging, difficulty in filler replacement and low adaptability. To address the above problems, this research proposes a modular filler design constructed wetland based on the concept of assembly construction, which can quickly replace the clogged filler without destroying the overall structure of the wetland. Four commonly used fillers were selected and applied to the pilot system of the assembled constructed wetland in this study, in order to investigate the purification effect of the constructed wetland system with different filler module combinations (CW1, CW2, CW3) on the simulated wastewater. The results showed that the filler combination CW1 was the best for the removal of NH4+-N, and for TP and COD, CW2 has the best removal effect. Therefore, the assembled constructed wetland is adjustable and substantially reduces the maintenance cost, which provides technical guidance for its application in engineering.
Criminological Analysis of Green Delicts in the Federal District of Brazil
Authors: Ribeiro Renata Esteves , Corrêa Rodrigo Studart , Couto Júnior (In Memoriam) Antônio Felipe
Published: April 2024

Green criminology studies transgressions that cause damage to the natural environment. Spatial approaches deal with incidental conditions of every sort of crime, and they are particularly appropriate to unveil rational components of criminal activities. In the Brazilian scenario, previous studies have pointed to the need for law enforcement and further studies on green criminology. This work aimed to unveil spatial patterns of environmental crimes in the Federal District of Brazil (FDB) and their possible causes. Records of environmental crimes from 2009 to 2016 registered by the local police were subject to spatial statistics, and results showed that most occurred in urban areas. Brasília City and its surrounding counties, farms, legally protected areas, and natural habitats create a mosaic of land uses that have influenced the spatial distribution of environmental crimes recorded by the local police. Over the years, crimes have occurred repeatedly in similar areas, suggesting sensitive places for their commitment. Still, those areas were not restricted to the neighborhood boundaries, and the homogeneity among contiguous neighborhoods supported similar levels of disorder. The proximity of these places to legally protected areas, the permeability phenomenon, and some types of land use have been identified as possible explanations for those crime records.
Metacomunicación de las Agencias de Comunicación y Relaciones Públicas en Portugal
Authors: Borges Fabia Ortega , Siller Carmen Bermejo , Tuzzo Simone Antoniaci
Published: April 2024

La investigación parte del interés por averiguar el grado de promoción y comunicación que las Agencias de Comunicación y RR. PP hacen de sí mismas en el medio digital. Se establece como objetivo general analizar cómo las Agencias de Comunicación y Relaciones Públicas en Portugal se comunican de forma online, es decir, presentan sus servicios a través de las plataformas de comunicación digital comprobando si ejercen la tarea comunicacional que venden al exterior con ellas mismas, o lo que se denomina en este artículo de metacomunicación como una auto referencia, resignificando el propio concepto. Se procede a la elección de la muestra de estudio seleccionando un total de 56 agencias repartidas entre los miembros destacados de APECOM, Asociación Portuguesa de Empresas Consultoras en Comunicación y Relaciones Públicas, y otras agencias seleccionadas que están fuera de esta asociación. Para la recopilación de los datos se elabora una herramienta metodológica, una ficha de análisis digital con los datos más relevantes de cada una de las plataformas seleccionadas; tanto la página web, como las redes sociales más demandadas en la actualidad: LinkedIn, Facebook, Instagram, Twitter y YouTube. Los resultados apuntan que tanto las webs como las redes sociales no están siendo usadas su totalidad, encontrando variaciones. La conclusión indica que las agencias asociadas a APECOM tienen una mayor exposición en algunas redes sociales y trabajan su forma de comunicación de forma más activa.
Evaluación del sistema de ventilación forzada por presión positiva en el comportamiento productivo de pollos de carne en la etapa de acabado en Chanchamayo
Authors: Cumpa G. Marcial , Lora G. Alfredo
Published: April 2024

Un estudio fue realizado con el objetivo de evaluar el uso del sistema de ventilación forzada por presión positiva, en la producción de pollos de carne en Chanchamayo. Se utilizaron 10,800 pollos machos (1.38 Kg. y 28 días de edad) para evaluar dos tratamientos: el sistema de ventilación natural y la ventilación forzada por presión positiva. El sistema de ventilación forzada por presión positiva mejoró significativamente el control de la humedad, la velocidad del viento y la sensación térmica; sin embargo, no hubo resultados significativos para el control de la temperatura. A los 42 días de edad, el uso de la ventilación positiva mejoró significativamente la producción de carne por área, consumo de alimento, conversión alimenticia y el índice de eficiencia productiva. Asimismo, el tratamiento con ventilación forzada resultó en una menor humedad de cama, menor mortalidad y mayor retribución económica en comparación con la ventilación natural. Los resultados demuestran que la aplicación de un sistema de ventilación forzada por presión positiva tuvo efectos positivos en la producción de pollos de carne.
Influencia del dilutor Tris y Ovine Freezing sobre la integridad de membrana citoplasmática, durante la congelación de semen de ovinos en pajillas de 0.5 ML
Authors: Pantoja A. César , Cabrera V. Prospero
Published: April 2024

Con la finalidad de analizar el efecto de  dos dilutores (Tris_glucosa y Ovine Freezing Buffer UA 466/005238) en la motilidad e integridad de membrana citoplasmática de los espermatozoides, durante el proceso de congelación, se condujo una investigación en el Banco Nacional de Semen - Universidad Nacional Agraria la Molina. Se usaron 02 carneros Assaf, 02 Canelas (0.75 Black belly + 0.25 Criollo) y 01 Black Belly, los mismos que fueron alimentados con maíz chala más una ración de concentrado. El semen puro utilizado fue de buena calidad y los valores de las características seminales estuvieron dentro de los parámetros para esta especie. La motilidad individual progresiva  (MIP) del semen refrigerado, fue 81 % ± 2.75, 83 % ± 2.74 en Tris (T1) y Ovine Freezing (T2), respectivamente; mientras que la proporción de espermatozoides con membrana intacta, evaluada por la prueba de HOST* fue 78 % ± 4.76, 79 % ± 3.96 para los dilutores Tris y Ovine Freezing, respectivamente. En el semen congelado - descongelado, la  MIP fue 61 % ± 3.57 y  63 % ± 2.41; los valores HOST fueron 40 % ± 3.57 y 43 % ± 2.85 para los dilutores Tris y Ovine, respectivamente, existiendo diferencias altamente significativas entre dilutores, entre carneros y momentos de procesamiento (P<0.01). Se registraron regresiones lineales significativas (P<0.05) entre HOST de semen fresco y HOST post descongelado de semen diluido ya sea con Tris o con Ovine Freezing. Se concluye que: El dilutor Ovine freezing, conservó mejor el semen durante el proceso de congelación; la prueba hipoosmótica, es un buen indicador de la calidad de semen, su aplicación es muy práctica, precisa y sobre todo permite elegir el reproductor mas adecuado.
Evaluación de la fertilidad in vitro del semen de toros jóvenes nacionales en ovocitos provenientes de ovarios de animales beneficiados
Authors: Cabrera V. Prospero , Yoong K. Washington
Published: April 2024

El presente trabajo se desarrolló en el Centro de Investigación y Enseñanza en Transferencia de Embriones (CIETE), convenio Universidad Nacional Agraria La Molina (UNALM) - Ministerio de Agricultura (MINAG); ubicada en el campus de la UNALM. El objetivo fue evaluar la fertilidad y la producción de embriones in vitro de cuatro toros provenientes del Banco Nacional de Semen: Pepe, Miguel, Juanjo y Vito. Para este estudio se utilizaron 1031 ovocitos de calidad A y B aspirados de ovarios de vacas beneficiadas en camal. Los ovocitos fueron madurados en medio TCM-199. Para la separación espermática se uso el método de centrifugación con gradientes de Percoll, la capacitación y fertilización se realizó en el medio TALP-IVF + PHE y el cultivo de embriones con medio Sofaa + 5% de Suero Fetal Bovino (SFB). Los embriones fueron evaluados los días 7, 8 y 9 después de la fertilización. De los resultados obtenidos no se encontraron diferencias estadísticas significativas entre los cuatro toros evaluados (P>0.05), siendo el porcentaje de fertilización de 68.8%, 72.8%, 63.3% y 56.7% para Juanjo, Vito, Pepe y Miguel, respectivamente. Respecto a la producción de embriones tampoco encontramos diferencias estadísticas significativas entre los toros (P>0.05) obteniéndose para el caso de Juanjo 32.2%, Vito 29.3%, Pepe 20.3% y Miguel 20%. De estos resultados se puede concluir que los toros evaluados se encuentran en el rango normal de producción de embriones in vitro, de 20% a 40% reportado por Palma y col (2001).
Composición de Simplejos de Bézier mediante los Blossoms y una Aplicación al Diseño de una Curva sobre una Superficie de Bézier
Authors: Canchoa Q. Alessandri , Dueñas B. Juan
Published: April 2024

En el presente trabajo de investigación se desarrollan los fundamentos de la teoría de los blossom para simplejos de Bézier y los elementos necesarios para el manejo de los índices de los puntos de control de una superficie de Bézier y el algoritmo de de Casteljau para simplejos de Bézier mediante los blossom y como una aplicación de ella se propone una técnica para diseñar una curva sobre una superficie de Bézier.
Introducción a los Espacios Riemannianos Globalmente Simétricos
Authors: Santisteban L. Edgar , Pérez T. Zelideth
Published: April 2024

En este trabajo de investigación presentamos una breve introducción a los espacios riemannianos globalmente simétricos, siendo la conexión afín, denotada por r; un elemento importante para establecer definiciones, efectuar las pruebas de los teoremas y lemas más importantes que nos permiten identificar las características topologógicas de tales espacios. Iniciamos definiendo la simetría geodésica, como medio para definir los espacios localmente simétricos afines e introducir los espacios riemannianos globalmente simétricos por medio del grupo de isometrñias I(M) y del tensor curvatura R.
Caracterización de sedimiento acumulado en alcantarillas. Caso: Ciudad de Santander en España
Authors: Ramos Fernández Lía , Tejero Monzón Juan , Temprano Gonzáles Javier
Published: April 2024

La necesidad de conocer el comportamiento y la composición físico-química, bacteriológica y metales de los sedimentos depositados en una red de alcantarillado, es esencial para implantar programas de manejo de la red y de todo el sistema de saneamiento de la ciudad debido a que los sedimentos que se encuentran dentro de la red, son los sedimentos que van a ser decantados en las plantas de tratamiento de la ciudad. Por lo anterior, este trabajo de investigación se orienta a caracterizar el sedimento acumulado en una red de alcantarillado unitaria. Se analizó durante un periodo de tres meses con muestreos semanales, la evolución temporal de la composición físico-química, bacteriológica y metales en los sedimentos de dos pozos de registro de la red de alcantarillado de la ciudad de Santander en España. Se obtuvieron valores entre 1325-1770 kg/m3 de densidad, 0.36-1.60 mm de D50, 14894- 25454 mg/kg de DQO, 6269-13878 mg/kg de DBO, 368-902 mg/kg de N, 5-17 mg/kg de P-PO4 -3, 5.5-6.2 log(ufc)/g de CT, 4.5-5.6 log(ufc)/g de CF, 5.1-13.3 mg/kg de Cu, 415-4180 mg/kg de Fe, 58-282 mg/kg de Zn. Los sedimentos están compuestos principalmente de arena, con un 96-98% de DQO y DBO particulada y 82-99% de nitrógeno orgánico. Además, el sedimento es fácilmente biodegradable para el pozo 1 y para la capa superior del pozo 2, y difícilmente biodegradable para la capa inferior del pozo 2. Los mayores valores de D50, DQO, DBO, N, P-PO4 -3, CT y CF se obtuvieron en la capa superior del pozo 2; y los mayores valores de densidad y metales en la capa inferior. La concentración de metales cumple la normativa española de utilización de lodos de depuración en el sector agrario.
Estrategias para la competitividad en la Agroexportación de Alcachofa
Authors: Fernández J. Leoncio
Published: April 2024

Esta investigación tuvo como objetivo definir la estrategias para la competitividad en la agroexportación de alcachofa, aplicando para ello el modelo de Michael porter referida a las estrategias genéricas o generales; pero complementando el análisis con el modelo de Cliff Bowman, que sitúa mas apropiadamente en el entorno la definición de la estrategia. El resultado fue definir el “liderazgo en costos” como estrategia para la competitividad, complementado con una estrategia de diferenciación. Adicionalmente se analizaron algunos indicadores de producción, exportación, rendimiento, e importancia socioeconómica de la alcachofa. Durante el periodo 1994- 2005, Perú muestra una tendencia creciente en los volúmenes de producción, así como también se sitúa tercero en mayor rendimiento (tm/ha) entre los principales países productores. Por último, se presentan algunas evidencias de la importancia de esta alternativa de agronegocios, a través de experiencias de proyectos donde participan productores, empresas e Instituciones.
Análisis de Tablas Múltiples de Datos: El Método STATIS
Authors: Menacho Chiok César
Published: April 2024

La presente investigación tiene como objetivo presentar un método para el análisis tablas múltiples de datos. El STATIS es una generalización del análisis de componentes principales (ACP), su objetivo es analizar varios conjuntos de tablas coleccionadas sobre las mismas observaciones. El objetivo del método de STATIS es 1) para comparar y analizar la relación entre los diferentes conjuntos de datos, 2) para combinar dentro de una estructura común llamada compromiso, el cual es analizado via ACP para revelar la estructura común entre las observaciones y finalmente 3) para proyectar cada conjunto de datos originales sobre el compromiso para analizar las similitudes y discrepancias.
Producción de Cocaína: Simulación económica de algunos efectos de política en los países productores
Authors: Ortiz S. Álvaro
Published: April 2024

En base a un modelo de simulación, en el que se incluye explícitamente la competencia en la asignación de recursos, se muestra en este trabajo, el resultado del uso del factor mano de obra, en la producción de bienes ilícitos (cocaína) y bienes lícitos (otros bienes). El impacto de un cambio en el precio de la hoja de coca en el consumo de cocaína, es poco significativo. Cualquier estrategia de sustitución de cultivos, hace que la economía legal, compita por los servicios de la mano de obra con la economía ilegal.
Acceso y uso de las tecnologías visuales y sus posibles repercusiones en los alumnos de la UNALM
Authors: Castillo Hilario Mario Buenaventura
Published: April 2024

El objetivo de este artículo es mostrar el nivel de acceso, uso y manejo de las tecnologías visuales por parte de los alumnos de la UNALM, a partir de la aplicación de una encuesta a una muestra de 104 alumnos. Se comprobó que la mayoría de estudiantes accede, usa y opera cámaras fotográficas, computadoras, videocámaras, celulares con cámaras fotográficas incorporadas y softwares de diseño gráfico. Sin embargo, el conocimiento y dominio del lenguaje visual son mínimos. Asimismo, es posible suponer que los aspectos cognitivos y comunicativos de los universitarios de ahora han sido afectados por la influencia de las tecnologías visuales.
Estudio de la variabilidad genética en poblaciones de Argopecten purpuratus de Chile y Perú
Authors: Ysla Ch. Luis
Published: April 2024

La concha de abanico (Argopecten purpuratus) se distribuye en la costa del Pacifico Sur desde Perú (Bahía de Sechura) hasta Chile (Bahía de Tongoy). El conocimiento de la estructura genética poblacional es de gran importancia para el manejo y conservación de este recurso compartido por ambos países. Para esto se estudiaron trespoblaciones de concha de abanico de cada país con el fin de compararlas, utilizando para ello electroforesis de aloenzimas. Las enzimas que tuvieron un mejor revelado fueron la MDH la a-GPD y la PGM. Con las frecuencias alelicas obtenidas a partir del patrón de bandeo producto de la electroforesis se ha obtenido la distancia genética de Nei así como los índices de Wright que dan como resultado que la población de Argopecten purpuratus presente una estructura genética la cual puede considerarse como una megapoblacion.
Observaciones preliminares del efecto de la Canela (Cinnamomum zeylanicum) y Clavo de olor (Eugenia caryophyllata) en el crecimiento de juveniles de Tilapia Roja (Oreochromis spp.), bajo condiciones de laboratorio
Authors: Verastegui M. Aníbal , Fukushima Manuel
Published: April 2024

El experimento se realizó para determinar el efecto promotor del crecimiento de la canela (Cinnamomum zeylanicum) y clavo de olor (Eugenia caryophyllata) incorporados al 0.5, 1.0 y 2.0 % en base a peso, en la dieta de juveniles de tilapia roja (Oreochromis spp.). Se preparó 7 dietas experimentales, 3 tratamientos por cada prebiótico natural (canela y clavo de olor) y uno control. La alimentación se efectuó tres veces al día (8:00, 12:00 y 16:00 horas) en juveniles de 7.71 ± 0.23 g. (7.84 ± 0.09 cm. LT). El periodo experimental comprendió 8 semanas, utilizando un sistema de recirculación (RAS). Los peces alimentados con canela a un nivel del 2 % mostraron el mayor crecimiento. El tratamiento que muestra el 2do valor mas alto en crecimiento fue el que corresponde al mismo producto incluido al 1.0 % en peso. Lo que demuestra que ambos niveles de inclusión de este promotor de crecimiento generaron una respuesta positiva del tratamiento, observándose que, el mayor nivel de inclusión en la formulación está ligado al mayor efecto en términos de crecimiento de los peces.
Efecto de diferentes emulsificantes en las propiedades reológicas y la eflorescencia grasa del chocolate oscuro
Authors: Chire Fajardo Gabriela C. , Hartel Richard W.
Published: April 2024

El presente estudio experimental investigó el efecto de los emulsificantes Lecitina de soya y polirricinoleato de poliglicerol (PGPR), utilizados en proporciones de 0,1% y 0,3% en las propiedades reológicas y la eflorescencia grasa en chocolate oscuro. Las muestras fueron preparadas en el laboratorio a las mismas condiciones. Se evaluó el efecto con respecto a sus parámetros reológicos de viscosidad plástica y valor mínimo de Casson del chocolate oscuro medidos a 40 ºC, usando el reómetro rotacional Brookfield, a 0,3% PGPR se observó parámetros de Casson menores en todos los casos y a 0,1% de PGPR fueron menores comparados con lecitina de soya. Los chocolates fueron almacenados en una cámara a temperaturas cíclicas de 19 a 29 ± 1 ºC cada 6 horas y humedad relativa de 50 a 60%. Posteriormente se evaluó su efecto con respecto a la eflorescencia grasa en el chocolate definido como índice de blancura (IB) y brillo (UB) superficial medidos con un colorimetro y un goniofotómetro, respectivamente. Para la medición del índice de blancura se consideró un tiempo de 100 días y para el brillo de 75 días. Los resultados obtenidos indicaron que existe una influencia particular de un grupo de PGPR a dosis de 0,1% que contribuyeron con el retardo de la eflorescencia grasa y la pérdida de brillo del chocolate oscuro.