bluuebunny/crossref_metadata_2025 huggingface dataset:
Opening the Social Sciences: Questioning Eurocentrism and Implementing Contextualized Open Science
Authors: Beigel Fernanda
Published: January 2024

In this paper, we analyze two global projects, twenty-five years apart—the report of the Gulbenkian Commission, published for the first time in Spanish in 1996, and the open science project, known more widely since the approval of the UNESCO Recommendation on Open Science of 2021—from the perspective of Latin America. In the first section, we revisit the program proposed by Immanuel Wallerstein in the Gulbenkian Report to “open the social sciences” and its main pillars. We then relate this project to the idea of citizen science, the FAIR and CARE principles, and the need to advance participatory science practices with informational justice. Afterwards, we analyze the Latin American path for open science and collaborative infrastructure that has been developing since the 1950s. We analyze the intellectual, institutional, and political conditions that allow our region to carve its own path for open science—and the extent to which the social sciences participate in that process and are affected or promoted by it. Finally, we discuss the critical role of the region’s evaluation systems in producing a transformation that reaches the magnitude of open science, without subalternizing the communities that participate in the co-production of open knowledges.
Two synchronous paraneoplastic endocrine syndromes in a 53-year-old male with broadly metastatic widely invasive Hürthle cell carcinoma
Authors: Orrego John J , Chorny Joseph A
Published: January 2024

Unlike medullary thyroid carcinomas, follicular cell-derived thyroid malignancies have rarely been associated with paraneoplastic endocrine syndromes. An ultrarare case of a middle-aged man with heavily treated broadly metastatic radioactive iodine-refractory widely invasive Hürthle cell carcinoma (HCC) of the thyroid with two synchronous paraneoplastic endocrine syndromes, T3 thyrotoxicosis and hypercalcemia of malignancy, is discussed here. The levothyroxine-induced T3 thyrotoxicosis was a gradual process that became more noticeable as the tumor burden, refractory to different modalities of therapy, expanded. The 1,25-dihydroxyvitamin-D-mediated hypercalcemia, on the other hand, developed in a manner of weeks, as it usually happens. It is important to emphasize that in patients with metastatic Hürthle cell and follicular carcinomas of the thyroid, on TSH suppressive therapy, the unexplained and progressive decline in FT4 and rise in FT3 levels, resulting in an elevated FT4/FT3 ratio, could be an indication of augmented type 1 (D1) and/or type 2 (D2) deiodinase expression in tumoral tissue, causing an increased conversion from the prohormone T4 into the active metabolite T3 via outer ring deiodination.

Learning points

Albeit extremely rare, some patients with thyroid cancer can present with more than one concomitant paraneoplastic syndrome.

Although medullary thyroid carcinoma is the thyroid malignancy that is usually associated with paraneoplastic endocrine syndromes, follicular cell-derived thyroid cancers have been rarely described as being the culprit.

In patients with metastatic Hürthle cell and follicular thyroid carcinomas, the unexplained and progressive decline in FT4 and rise in FT3 levels could be an indication of augmented type 1 (D1) and/or type 2 (D2) deiodinase expression in tumoral tissue, causing an increased conversion from T4 into T3 leading to T3 thyrotoxicosis.
A case of adrenal cortical carcinoma arising from a regularly monitored sub-centimetre adrenal incidentaloma
Authors: Parry Sarah N , Lau Namson S
Published: January 2024

Approximately 80% of adrenal incidentalomas are benign, and development into adrenal cortical cancer is extremely rare. This is a major reason behind clinical guidelines recommending surveillance of incidentalomas for a relatively short duration of up to 5 years. Surveillance of lesions less than 1 cm is not routinely recommended. A 70-year-old lady was diagnosed with a non-hyperfunctioning 8 mm right adrenal lesion. She underwent annual biochemical and radiological assessment for 5 years before surveillance was extended to 2-yearly intervals. The lesion was stable in size, and radiological characteristics were consistent with a benign adenoma. Seven years after the initial detection of the adrenal lesion, she developed acute abdominal pain. Imaging revealed a 7 cm right adrenal lesion, which was surgically resected and histologically confirmed to be adrenal cortical cancer. She died 1 year later. Clinical guidelines have moved towards a shortened duration of surveillance of incidentalomas. Even though malignant transformation is a rare event, it is possible that this will result in a delayed diagnosis of adrenal cortical cancer, a highly aggressive malignancy with a poor prognosis. To our knowledge, this is the first published case of an adrenal lesion of less than 1 cm developing into adrenal cortical cancer.

Learning points

Adrenal incidentalomas are increasingly common.

Clinical practice guidelines exist to aid in differentiating benign and malignant lesions and assessing functional status.

Transformation of adrenal incidentalomas to adrenal cortical carcinomas is a rare but recognised event.
PPAR-gamma influences developmental competence and trophectoderm lineage specification in bovine embryos
Authors: McGraw Maura S , Rajput Sandeep K , Daigneault Bradford W
Published: January 2024

In brief

Peroxisome proliferator-activated receptor gamma (PPARG) is a critical regulator of placental function, but earlier roles in preimplantation embryo development and embryonic origins of placental formation have not been established. Results herein demonstrate that PPARG responds to pharmacologic stimulation in the bovine preimplantation embryo and influences blastocyst development, cell lineage specification, and transcripts important for placental function.

Peroxisome proliferator-activated receptor gamma (PPARG) is a key regulator of metabolism with conserved roles that are indispensable for placental function, suggesting previously unidentified and important roles in preimplantation embryo development. Herein, we report the functional characterization of bovine PPARG to reveal expression beginning on D6 of development with nuclear and ubiquitous patterns. Day 6 PPARG+ embryos have fewer total cells and a lower proportion of trophectoderm cells compared to PPARG− embryos (P < 0.05). Coculture with a PPARG agonist, rosiglitazone (Ros), or antagonist GW9662 (GW), decreases blastocyst development (P < 0.01). Day 7.5 (D7.5) developmentally delayed embryos exposed to Ros express lower transcript abundance of key genes important for placental development and cell lineage formation (CDX2, RXRB, SP1, TFAP2C, SIRT1, and PTEN). In contrast, Ros does not alter transcript abundance in D7.5 blastocysts, but GW treatment lowers RXRA, RXRB, SP1, and NFKB1 expression. Knockout of embryonic PPARG does not alter blastocyst formation and hatching ability but decreases total cell number in D7.5 blastocysts. The decreased embryo development response and affected pathways following targeted pharmacological perturbation vs embryonic knockout of PPARG suggest roles of both maternal and embryonic origins. These data reveal regulatory contributions of PPARG in preimplantation embryo development, cell lineage formation, and regulation of transcripts associated with placental function.
Pricing nachhaltig gestalten
Authors: Daugart Jan , Hoffjan Andreas
Published: January 2024

Als internationales Familienunternehmen mit Hauptsitz in Remscheid gehört die Vaillant Group zu den Markt- und Technologieführern der Branche. Im Bereich der Heiz-, Lüftungs- und Klimatechnik, welche auch regenerative Energien nutzt, ist Vaillant europaweit sowie in China und der Türkei tätig. Das Produktportfolio umfasst Wärmepumpen, Solarthermie- und Photovoltaikanlagen, Lüftungsgeräte für Niedrigenergiehäuser, Heizsysteme auf Basis fossiler Energieträger wie Brennwertheizgeräte und intelligente Regelungen.
Memórias de professoras: os significados da escolha profissional.
Authors: Corrêa Roesch Isabel Cristina , Fortes de Oliveira Valeska , Pereira Fátima
Published: January 2024

O objetivo deste estudo é o entendimento dos subterrâneos da formação docente como uma construção político cultural da escrita (auto)biográfica. Assim, a proposta do texto é mostrar os processos pelos quais me constitui como docente negra e pesquisadora. A metodologia utilizada, para obter maiores informações dos participantes da pesquisa, foram os relatos orais e autobiográficos. Os sujeitos que participaram da pesquisa, ao narrarem suas lembranças auferidas de experiências ocorridas ao longo de suas vidas, utilizam-se da memória. Assim, novas vivências estarão sempre contribuindo para a modificação do conteúdo da memória, na construção de novos sentidos e significados.
Konvergensi Konten Berita Melalui Teknik Search Engine Optimization dan Bahasa Jurnalistik Pada Pemilihan Top News di Media Antaranews.com
Authors: Nasution Irfansyah Naufal , Muslimah Fauziah , Rubiyanah Rubiyanah
Published: January 2024

Gelombang informasi yang massif menuntut media massa selalu kreatif dan inovatif untuk terus berupaya menjadi rujukan sumber informasi publik yang tepercaya. Artikel ini berupaya menganalisis upaya Antaranews.com mengintegrasikan penggunaan bahasa jurnalistik dengan teknik Search Engine Optimization (SEO) serta dampaknya terhadap penentuan prioritas dalam konteks fungsi industri media massa dan peran pendidikan pada media massa. Penelitian ini mengadopsi paradigma konstruktivisme serta menerapkan pendekatan penelitian kualitatif dengan metode analisis deskriptif. Teori yang digunakan dalam penelitian ini merujuk kepada teori komunikasi massa MC-Quail dengan fokus pada penerapan konsep 10 Pedoman Bahasa Jurnalistik Persatuan Wartawan Indonesia. Hasil penelitian ini menggambarkan bahwa penggunaan bahasa jurnalistik dalam kategori Top News di Antaranews.com belum sepenuhnya mematuhi prinsip-prinsip bahasa jurnalistik. Tantangan untuk memenuhi tujuan ekonomi serta mempertahankan karakteristik uniknya sebagai media online berdampak pada berkurangnya salah satu fungsinya sebagai media pendidikan meskidi pihak lain, Antaranews.com telah berhasil secara efektif memaksimalkan penggunaan teknik white hat SEO dan tidak menerapkan click bait dalam setiap judul berita. Dengan demikian, Antaranews.com mampu menjalankan fungsinya dengan baik sebagai sebuah industri media massa.
Minat Baca Berita Generasi Y dan Z Melalui Headline Instagram Carousel Liputan6.com
Authors: Salsabilla Safira , Ridho Kholis , Suhaimi Suhaimi
Published: January 2024

There are various personal reasons someone is interested in reading the news. Apart from the level of education, the abundance of information, generational differences, even production strategies and the appearance of news publications shape people's new habits in consuming news. There are those who believe that the appearance of news packaging influences interest in reading news and in other side interest in reading news depends on the substance of the content. This research tests whether there is an influence of the Liputan6.com headline carousel on generation Y and Z's reading interest in news content. Liputan6.com carousel content is posted on its official Instagram account. Carousel content is one of the results of technological developments in the field of journalism in terms of news publications. The carousel platform is relatively new because it was released in 2017 and is still used today. The theory used in this research is SOR proposed by Hovlan, Janis and Kelley. This theory assumes that the stimulation provided by the mass media in the form of news has an effect on the communicant. The research uses a quantitative approach with a questionnaire instrument. The data results were processed using Simple Linear Regression Test statistics to find the influence of the carousel headline and the quality of the carousel content on the reading interest of generations Y and Z, both partially and simultaneously. Based on the research results, it can be concluded that there is an influence from carousel headlines on generation Y and Z's reading interest in Instagram @liputan6 carousel content of 39.4%.
Is there an effect of electromagnetic waves from base stations on the breeding success of Ciconia ciconia ciconia in Algeria?
Authors: Sakraoui D. , Ziane N. , Ghalem R. , Boukheroufa M. , Habbachi W.
Published: January 2024

New nest supports used by the white stork Ciconia ciconia ciconia (Linnaeus, 1775) are mobile phone network relay antennas, which are not without danger because they emit electromagnetic waves that can have a major, although insidious, impact on the species. The aim of this study is to assess the effects of electromagnetic waves from mobile phone network base stations on white stork reproduction. We monitored the breeding phenology of the storks as a function of the distance of their nests from the base stations over 2 consecutive seasons, 2020 and 2021. The work took place in the North-East of Algeria, in Annaba and El-Tarf provinces. The nests were counted and divided into 3 distinct groups. The first is located on the relay antennae, the second less than 200 m and the third more than 300 m from the antennae. We calculated nest occupancy, number of young in the nest and number of nests without young. The results show that nests located directly on base stations have a reduced clutch size, not exceeding two storks and a low reproductive success since the majority of nests (51.9%) remained without young. The number of young storks tends to increase in nests far from base stations. Broods with 3 and 4 young are generally those located more than 300 m from relay antennas.
Estimating biomass of woody plants that grow in the different As-contaminated techno-soils in the ore-bearing provinces of Eastern Germany
Authors: Lovynska V. , Stankevich S. , Sytnyk S. , Montzka C. , Holoborodko K. , Heilmeier H. , Wiche О.
Published: January 2024

Establishing the role of woody species as an instrument for heavy metal bioaccumulation is a relevant issue today in the context of the development of the phytoremediation system. The article presents the results of studies on the influence of different Arsenic (As) concentrations in soil on the development of aboveground biomass in Betula pendula Roth. and Populus tremula L. stands under conditions of reclamation plantings. The studies were conducted in 30 locations of birch and poplar tree plantations within the ore-producing regions of Saxony (Eastern Germany) in soil with different levels of As contamination. The highest As content was noted in the technosoil of the Davidschacht site, where the metalloid content was 229.3 times greater compared with a value in a conditionally uncontaminated area (Großschirma). The values of leaf area index and aboveground biomass obtained in field measurements were presented. The aboveground biomass values in the investigated plantations ranged from 189.9 ±10.16 to 201.8 ± 19.09 t/ha, and leaf area index values ranged from 1.74 ± 0.29 to 2.05 ± 0.16 m2/m2. Sentinel-2A multispectral images were processed for the construction of a map of the aboveground biomass distribution within the region under study. The values of the spectral indices for leaf area index were obtained with subsequent construction of the regression dependence of the aboveground biomass in the plantings on this indicator. The RMSE value for the developed model of the dependence of aboveground biomass on the leaf area index was 17.84 t/ha, which could be considered as satisfactory and can serve as a basis for practical application of the model developed. The inverse trend in relation to locations with different levels of soil contamination with As was determined for the aboveground biomass indicator. Within the region under study, the highest value of aboveground biomass in the stands was found for the area with the lowest As level. The results showed that the correlation coefficient between the highest of the optimal spectral indices, the leaf area index, and the aboveground biomass in B. pendula and P. tremula plantings was statistically significant and approached the value of 0.7. The results presented can become a theoretical basis for monitoring the accumulation of aboveground biomass of tree stands in areas with different levels of soil contamination with As. In perspective, the presented model of biomass estimation based on spectral technologies can serve as an application basis for rapid assessment of the growth and development parameters of forest stands in As-contaminated areas.
Using normalised difference vegetation index in classification and agroecological zoning of spring row crops
Authors: Lykhovyd P. V.
Published: January 2024

Remote sensing is an important branch of modern science and technology with various applications in different branches of life sciences. Its application in agriculture is focused mainly on crop monitoring and yield prediction. However, the value of remote sensing in the systems of automated crop mapping and agroecological zoning of plant species is increasing. The main purpose of this study is to establish the possibility of using normalised difference vegetation index in the main spring row crops, namely maize, soybeans, sunflower, to precisely classify the fields with each crop, and to evaluate the best agroecological zones for their cultivation in rainfed conditions in Ukraine. The study was carried out using the data on the normalised difference vegetation index for the period May – November 2018 from 750 fields and experimental plots, randomly scattered over the territory of Ukraine with equal representation by every administrative district of the country. The index values were calculated using combined Landsat-8 and Sentinel-2 images, with further generalisation for every crop and region. Multiclass linear discriminant analysis and canonical discriminant analysis were applied to determine whether it is possible to distinguish between the studied crops using the values of the normalised difference vegetation index as the only input. As a result, it was established that the best zone for crop cultivation is the west of the country: NDVI values for the growing season averaged to 0.34 for sunflower, 0.36 for soybeans, and 0.36 for maize, respectively. The worst growing conditions, based on the lowest NDVI values, were observed in the east for sunflower (0.26) and maize (0.25), but the minimum NDVI for soybeans (0.27) was observed in the south. Regarding the classification problem, it was found that the highest importance for the classification of crops is attributed to the values of the normalised difference vegetation index, recorded in August. The supervised learning using canonical discriminant function resulted in mediocre predictive performance of the multiple linear function with general classification accuracy of 56.5%. The best accuracy of classification was achieved for sunflower (70.4%), while it is difficult to distinguish between maize and soybeans because these crops have quite similar intra-seasonal dynamics of the vegetation index (classification accuracy was 46.8% and 52.4%, respectively; the total number of incorrectly predicted samples in the “maize-soybeans” group was 134 or 26.8%). The main limitation of this study is its single year basis, notwithstanding the fact that the year of the study was characterized as a typical one for most territory of Ukraine in terms of meteorological conditions. Therefore, more studies are required to clarify the possibility of a classification between maize and soybeans based on remote sensing data.
Das Kompetenzzentrum für Forschungsdaten (FoKUS) der Universität Stuttgart und die Berücksichtigung geisteswissenschaftlicher Forschungsdaten
Authors: Boehlke Fabian
Published: January 2024

Das Kompetenzzentrum für Forschungsdaten (FoKUS) ist die zentrale Einrichtung für Forschungsdaten der Universität Stuttgart. Im folgenden Beitrag wird zunächst die Einrichtung kurz vorgestellt. Anschließend geht es um die Frage, inwieweit die Angebote von FoKUS die gesamte fachliche Breite der Universität berücksichtigen und auf die jeweiligen Besonderheiten eingehen. Besonders in den Blickpunkt genommen werden die Services für geisteswissenschaftliche Forschungsdaten, wobei auch kurz auf deren Eigenschaften eingegangen wird
Einfluss der Europäischen Datenstrategie auf die Entwicklung des E-Government in Deutschland
Authors: Böhnke Lars
Published: January 2024

Mit der im Jahr 2020 veröffentlichten Europäischen Datenstrategie verfolgt die Europäische Kommission das Ziel, innerhalb der EU einen Binnenmarkt für Daten zu schaffen. Infolgedessen ergeben sich insbesondere für die elektronische öffentliche Verwaltung, dem sogenannten E-Government, neue Möglichkeiten zur Verbesserung ihres Serviceangebots. Die vorliegende Arbeit analysiert die Inhalte der Europäischen Datenstrategie hinsichtlich ihres Einflusses auf das E-Government in Deutschland und identifiziert dabei sowohl Chancen als auch Herausforderungen, mit denen Behörden in den kommenden Jahren möglicherweise konfrontiert werden.
Frauen in Rot
Authors: Herrmann Bettina
Published: January 2024

Wikipedia weist einen Gender Bias auf. Dieser auf das Geschlecht bezogene Verzerrungsaspekt macht sich zum Beispiel daran fest, dass nur rund 17,5 % aller biografischen deutschsprachigen Wikipedia-Artikel Frauen behandeln. Das Projekt „Frauen in Rot“ möchte dies ändern. Dieses Reflexionspapier illustriert den Prozess, als Neuling auf Wikipedia einen Artikel zu schreiben und einen Beitrag zu diesem Projekt zu leisten.
Cuatro obras de Julio Fonseca adaptadas para coro de trombones: Gran Fantasía Sinfónica, Marcha Heredia, Alma Tropical y Rayo de Sol
Authors: Bonilla Moya Martin
Published: January 2024

Este trabajo presenta el arreglo de cuatro obras de Julio Fonseca para coro de trombones: Gran Fantasía Sinfónica, Marcha Heredia, Alma Tropical y Rayo de Sol. Con ellas, se pretende contribuir con el rescate y difusión de la música costarricense, así como la creación de un repertorio nacional para que sea programado en conciertos y utilizado con fines didácticos en los planes de estudio de las cátedras de trombón.
An updated checklist of the marine birds (Aves) of Golfo Dulce, southern Costa Rica
Authors: Rojas-Barrantes Alejandra , Sandoval Luis
Published: January 2024

Golfo Dulce is a fjord-like embayment on the southern Paciﬁc coast of Costa Rica, which encompasses the marine protected area of Piedras Blancas National Park. The gulf is surrounded by mangroves, rocky shores, and sandy beaches that are home to migratory and resident bird species. Here, we provide a checklist of 73 marine birds, including records of six years of annual counts and incidental observations in Golfo Dulce. This paper represents an updated bird list, based on the 1998 Basic Information Units from Instituto Nacional de Biodiversidad. We added 16 species to the list, showing the importance of maintaining a monitoring program of marine birds in the Golfo Dulce area. We have also demonstrated the valuable contributions of citizen science for obtaining scientiﬁc information.
The Terror (1928)
Authors: Rhodes Gary D
Published: January 2024

Largely forgotten in the history of cinema is Warner Bros.–Vitaphone’s feature film The Terror (1928). To the extent it is remembered, it is because the film qualifies as the second “all-talkie” feature, Warner Bros.– Vitaphone’s Lights of New York (Bryan Foy, 1928) being the first. The Terror has also rightly been identified as the first talkie to feature a scream, which would become such an important sound in future horror movies. However, the key reason The Terror deserves recognition and further study is because it crucially requires a major revision in our understanding of film history. Beyond any doubt, The Terror was Hollywood’s first talkie to use a background score (“nondiegetic” music), with the term “background” being critical in this context, meaning music heard along with (in back of) audible dialogue.
Retos, riesgos y oportunidades de la vida afectiva del sacerdote
Authors: Chiclana-Actis Carlos , García-Borreguero Laura , López-Hernández Raquel
Published: January 2024

Los sacerdotes buscan identificarse con Cristo, llevar toda su actividad hacia Él, y precisan integrar todas las dimensiones de su vida, en particular la afectividad. Realizamos una investigación cualitativa, encuesta abierta, sobre retos, riesgos, oportunidades, qué ayudó y qué faltó en su vida afectiva. Respondieron 128 participantes, con 605 respuestas abiertas y 1.039 ideas diferentes. Destacan los conceptos referidos a lo relacional (vida espiritual con Dios, amistad general y sacerdotal, trato con muchas personas) en contraste con la soledad. Proponemos ocho dimensiones de desarrollo de la vida afectiva sacerdotal: relación con Dios, amistad, acompañamiento, fraternidad sacerdotal, formación, cuidado personal, conocimiento psicológico y misión.
Influence of an asymmetrical load on ground reaction forces during gait
Authors:   Lodz University of Technology, Talar Izabela , Hasiński Krzysztof ,   Lodz University of Technology, Semmad Pierre-Alban ,   Ecole Normale Supérieur des Arts et Métiers, Zagrodny Bartłomiej ,   Lodz University of Technology
Published: January 2024

Carrying loads asymmetrically can leads to pathological changes in musculoskeletal system or to its overload and injury. This work aims to show and analyze the distribution of ground reaction forces under the feet when an individual carries a load asymmetrically with different methods of carrying. The data were collected for young males. The values of forces were recorded on a pedobarographic force platform for 0%, 5%, 10% and 15% of the body mass and different way of carrying the load (backpack carried on one shoulder, cross body laptop bag, laptop bag held in one hand and laptop bag carried on one shoulder). This kind of carrying the asymmetrical load is most commonly observed on the university facilities. For all considered cases of asymmetrical loading, there were statistically important differences at the ground reaction forces in comparison to gait without any load. This indicates that wearing asymmetrical loading should be avoided.
The Image of Islam in Ms Marvel Series: An Analysis of Reception among Indonesian Muslim Audiences
Authors: Saputra Muhammad Irawan , Dewanto Putra fajar
Published: January 2024

The issue of Islamophobia has become a major concern of discussions, including regarding the representation of Muslims in Hollywood films, where Muslim characters are often portrayed as terrorists or perpetrators of violence. However, recently several Hollywood films are trying to create positive representations of Islam and Muslims, for example Ms Marvel film series, which features a Muslim superhero. This study aims to examine how Muslim audiences in Indonesia interpret the depiction of Islam in the Ms Marvel film series. The reception analysis is used to observe phenomena related to audience interpretation. The findings have illustrated that the Muslim audience tends to take exact acceptance of Hollywood's depiction of how Muslims dress in this film, which is called a dominant hegemonic position. However, some respondents have the opposite acceptance position and the negotiated position as well.
Comparative Analysis Of Energy Expenditure Assessments From The Graded Exercise Test Vs. Galaxy Watch And Apple Watch In Korean College Students During A 30-minute Workout: A Pilot Study
Authors: Oh In-Young , Jeon Ji-Joon , Kim Jin-Beom , Hyeon Jin-Yeong , Yeon Je-Min , Ha Hyun-Jun , Han Seong-Min , Kang Dong-Geon , So Wi-Young
Published: January 2024

OBJECTIVES In the modern era, there is heightened interest in understanding energy expenditure during exercise. Consequently, wearable devices such as the Galaxy Watch and Apple Watch have emerged as pivotal tools for daily health monitoring, given their convenience and increasing popularity. This study aimed to compare the calculated energy expenditure derived from the graded exercise test with readings from Galaxy and Apple Watches during a 30-min exercise session among Korean university students. Through this, we anticipate offering both motivation and clear insights into energy expenditure, thereby potentially aiding in weight management strategies for contemporary individuals.METHODS This study involved 27 college students from Korea National University of Transportation in Chungcheongbuk-do, Korea. We utilized COSMED's exercise load respiratory gas analysis system (Quark- CPET, COSMED, Rome, Italy), along with the Galaxy Watch (Galaxy Watch 5, Samsung, Seoul, Korea) and the Apple Watch (Apple watch series 5, Apple, Cupertino, USA) for measurements. Energy expenditure was monitored in real-time every 5 min throughout the 30-min exercise session. For statistical evaluations, we employed a one-way analysis of variance. Subsequent post-tests utilized the Tukey post-hoc test and Pearson correlation, with a significance level set at p<0.05.RESULTS Initially, no statistically significant difference emerged between energy expenditure readings from the graded exercise test and those from the Galaxy Watch across all time intervals: 5, 10, 15, 20, 25, and 30 min (p>0.05). Conversely, a notable difference was observed when comparing energy expenditure data from the graded exercise test to that of the Apple Watch for time intervals of 10, 15, 20, 25, and 30 min (p>0.05), although the 5-min interval did not exhibit a significant difference (p>0.05). Furthermore, a robust positive correlation was evident between the energy expenditure values derived from the graded exercise test and those from both the Galaxy Watch (r=0.952, p<0.001) and the Apple Watch (r=0.917, p<0.001).CONCLUSIONS Both devices demonstrated high reliability in calculating energy expenditure. Notably, the Galaxy Watch exhibited a more precise calculation compared to the Apple Watch, with a relative reliability margin of 3.5% higher. For individuals, especially those struggling with obesity, precise wearable devices that accurately reflect energy consumption can significantly boost motivation for exercise. Consequently, this study lays a foundation for future advancements in energy expenditure measurement tools, emphasizing enhanced convenience, reliability, and mobility.
Mapping Europeanization in the Greek online public sphere: Assessing the Europeanizing dynamics of social media
Authors: Archontaki Ioanna , Karadimitriou Achilleas , Giannouli Iliana , Papathanassopoulos Stylianos
Published: January 2024

For more than a decade, following the peak of the debt crisis, Greece has been facing multiple challenges. Amongthem, a pandemic (COVID-19) that brought the global and thus the Greek economy to a halt, an energy crisis that threatens to flatten entire social classes, a refugee crisis, and wider regional instability. All of these concurrent problems reflect crucial socio-economic transformations compounding the country’s unsustainable debt. Despite these adverse factors, in the present research the anti-European sentiments have almost entirely disappeared from the online public sphere. To examine the presence of Europe in the Greek online public discourse, a quantitative content analysis was conducted. The sample was based on 700 posts published on Facebook, Twitter and YouTube coming from mainstream media organisations’ accounts, individual users’ accounts, and public pages. According to the research findings, social media platforms function, to some extent, as alternative agenda setters, fostering the dissemination of topics, or the expression of viewpoints that are circumvented by the media organisations’ posts. Moreover, the online discussion regarding EU prospects and the European institutions’ policies are largely descriptive, devoid of any critical reflection or conflict. Therefore, Greece’s position in the EU looks like a one-dimensional issue, a feature that can be attributed to the fact that, in the Greek online public sphere, alternative voices and sources have a limited presence within the most viewed content of social media platforms.
Cuestionario variables de riesgo de deserción universitaria: comprensión y pertinencia del instrumento
Authors: Álvarez Idarraga Nelly Johana , Castellanos Barrera Silvia Katerinne , Niño Ramírez Ruby Yolima
Published: January 2024

El propósito de este artículo es mostrar la comprensión y pertinencia del Cuestionario Variables de Riesgo de Deserción Universitaria (cvrdu) a través del análisis de aplicación del instrumento a una muestra total de 173 estudiantes de primer a cuarto semestre del programa de Psicología de una Universidad privada en Bucaramanga, Colombia. Los hallazgos de esta investigación se centran en la validez del instrumento frente a la identificación de variables de deserción y la comprensión de este como una herramienta relevante para la consolidación de estrategias de apoyo que desarrollan los Departamentos de Permanencia Estudiantil de las instituciones de Educación Superior. Por otra parte, se logró identificar que los factores institucional y socioeconómico, son los elementos que podrían causar mayor deserción u abandono del proceso de formación de educación superior en la muestra intervenida. Se concluye con esta investigación que, a través de la aplicación del cvrdu es posible identificar las causas de deserción temprana en los estudiantes universitarios, las cuales varían con base en el contexto de las poblaciones intervenidas.
Perspective of use of expanded polystyrene as an alternative waterproof coating for electrodes used in underwater wet welding
Authors: Perdomo González Lorenzo , Queiroz Bracarense Alexandre , Quintana Puchol Rafael , Caires Pereira Ezequiel , Rodríguez Pérez Manuel , Duffus Scott Alejandro
Published: January 2024

Underwater wet welding, using shield metal arc welding (SMAW) manual process with coated electrode, is currently the most widely used technique for repair working in underwater wet conditions because its easy maneuverability characteristics. The coating is the structural part of the electrode with the greatest influence on its scope, so that its waterproofing is a prerequisite, which is performed by applying impermeable layers on it, commonly used for this operation, resins, waxes, paraffins or varnishes. This paper presents a preliminary assessment regarding the use of recycled polystyrene as an alternative for waterproof for these electrodes, addressing the main features of their preparation and application form. To evaluate this new waterproof, weld deposits were made with coated electrodes painted with polystyrene at a water depth of 50 m, comparing the performance of it with traditional varnishes, mainly with regard to the surface appearance of weld bead and the formation of pores in the weld metal. The chemical characterization of deposits obtained at a water depth also was performed. The preliminary results of the evaluation showed the feasibility of using expanded polystyrene as an alternative material for the manufacture of waterproofing for the electrodes used in underwater wet welding.
Achievable transmission rate in an Ieee 802.11 Manet link
Authors: Alzate Marco A. , Mejía Marcela , Peña Néstor M. , Labrador Miguel A.
Published: January 2024

For management purposes, it is very important to estimate the available bandwidth for each link in a MANET, in an accurate, timely and efficient way. In this paper we show analytical results on the probability distribution function of the bandwidth of a link in a MANET based on IEEE 802.11, that take into account transmission errors. We also show some analytical results on the fraction of time the channel is available for a given virtual link, so the effects of other transmitting nodes can also be taken into account. Together, these results can be usefully exploited in an efficient, accurate and distributed available bandwidth estimation mechanism.
Calibration and validation a 3D in the Santa Marta coastal area (Colombia)
Authors: García Francisco Fernando , Chang Gustavo , Palacio Carlos Alberto
Published: January 2024

This paper presents the calibration and validation of a hydrodynamic model to simulate the tides, currents and salinity and temperature conditions in the coastal area of Santa Marta Bay. The methodology used includes the numeric implementation of the model, the development of field measurements, and measurements data compared with simulations data. The error between measurements and simulations data was estimated to determine the quantitative reliability of the model.
Compensation of DC-link voltage oscillations in grid connected PV systems
Authors: Ramos Paja Carlos Andrés , Petrone Giovanni , Saavedra Montes Andrés Julian
Published: January 2024

This paper presents a compensation technique to mitigate the effect of DClink voltage oscillations on PV systems. The main features of the technique are: the compensation is applied directly to the duty cycle, so it is simple to integrate with traditional maximum power point tracking systems; and the compensation calculation does not depend on the systems parameters, so its design is general. Explicit equations are provided for PV systems based on Boost, Buck and Buck-Boost dc/dc converters. Finally, the proposed approach is experimentally verified.
Automatic detection of cranial fractures in radiological images using a pattern classifier
Authors: López Yáñez Itzamá , Flores Carapia Rolando , Yáñez Márquez Cornelio , Camacho Nieto Oscar
Published: January 2024

In this work, an automatic pattern classification system is presented, whose goal is detecting the presence or absence of fractures in cranial radiographic images. The basis for the proposal is an original coding technique, coupled with an emerging pattern classifier: the Gamma classifier. This proposal draws concepts from three areas of current scientific research: Mathematical Morphology, image histograms, and Alpha-Beta associative models. Also, an experimental study is presented, comparing the performance shown by the system to that exhibited by other pattern classifiers present in current scientific literature. The results obtained are competitive, reaching 94.23% of correct classification.
Active vibration control of vehicle suspension systems using sliding modes, differential flatness and generalized proportional-integral control
Authors: Chávez Conde Esteban , Beltrán Carbajal Francisco , Valderrábano González Antonio , Favela Contreras Antonio
Published: January 2024

This paper presents a design approach of robust active vibration control schemes for vehicle suspension systems using differential flatness, sliding modes and Generalized Proportional-Integral control techniques to attenuate undesirable vibrations induced by irregular road disturbances. Two control schemes are proposed: one employing position and velocity measurements and other requiring only position measurements. Integral reconstruction of the time derivatives of the flat output up to third order is proposed to avoid the use of velocity and acceleration sensors, as well as information of unknown road disturbances.
Oscillator for Biosensors based on Quartz Crystal Microbalance (QCM)
Authors: Montagut Ferizzola Yeison Javier , García Narbon José Vicente , Jiménez Jiménez Yolanda , March Iborra Carmen , Montoya Baides Angel , Torres Villa Róbinson Alberto , Arnau Vives Antonio
Published: January 2024

Quartz crystal is generally used in some applications as a microbalance taking advantage of its capacity to change the resonance frequency according to any surface mass change on the resonator. In this way a quartz crystal can be used as a transducer in a piezoelectric inmunosensor system in order to detect antigen-antibody bonds. An interface for Quartz Crystal Microbalances, QCM, based on an improved version of an oscillator in balanced differential configuration and its respective validation as a biosensor characterization system is introduced in this paper. The system was successfully tested in a piezoelectric inmunosensor for detecting the pesticide Carbaryl.
Description of execution time dynamics for a set of concurrent real-time tasks
Authors: Guevara López Pedro , Medel Juárez José de Jesús , Delgado Reyes Gustavo
Published: January 2024

A Real-time System (RTS) implemented in a digital computer interacts with the physical world through knowledge variables (sensors, actuators, Analogical - Digital, and Digital-Analogical convertors) processing its requirements through real-time tasks (Ji: i∈Z+). Each Ji is formed by a set of instances {ji,k: i, k∈Z+, i is the task index, k is the instance index} with at least three time constraints: arrival, execution and, interval times (Li,k, Ci,k, Di,k). The execution time identification ˆCi ,k , is based on Instrumental Variable parameter estimation and the recursive state space ARMA model. The execution times were measured experimentally using a Real-time Operative System QNX 6.5 Neutrino in an Intel Core i7 processor with a speed of 2.66 GHz. This paper presents a state of the art real-time task model, execution time measurements, an Instrumental Variable parameter estimator on recursive state space identification, experimentation and, results.
Piecewise line-symmetric spherical motions for orientation interpolation in 5-Axis CNC tool path planning
Authors: Trujillo Suárez Carlos Andrés , Jeffrey Ge Qiaode
Published: January 2024

This paper employs quaternion biarcs to interpolate a set of orientations with angular velocity constraints. The resulting quaternion curve represents a piecewise line-symmetric spherical motion with C1 continuity. The purpose of this effort is to put line-symmetric motions into use from the viewpoint of motion approximation and interpolation, and to present their potential applications in Computerized Numerical Control (CNC) machining simulation and tool path planning. Quaternion biarcs may be used to approximate B-spline quaternion curves that represent rational spherical motions that have applications in robot path planning, CAD/CAM and computer graphics.
Factors related with success of total productive maintenance
Authors: García Alcaraz Jorge Luis
Published: January 2024

Total Productive Maintenance (TPM) is one tool widely used in production areas, aimed at increasing the availability of machinery and equipment production and economic benefits of businesses. However, do not know the key success factors for it implementation. This article presents the results of a survey that consisted of 84 questions and was applied to maintenance managers and supervisors of companies located in Ciudad Juarez, which should be answered on a Likert scale. Exploratory factorial analysis (EFA) was applied to information through the method of principal components and a varimax rotation was conducted and found that only 3 factors could explain the 65,06% of total variance, related to managerial commitment, cleanup culture and integration of operators in maintenance decisions. We also performed a confirmatory factor analysis (CFA) to validate the results, confirming the findings in EFA.
Relationship between chlorophyll a pigment and algal geometric biovolume determination in a floodplain lake (Ciénaga Ayapel, Córdoba-Colombia)
Authors: Hernández Esnedy , Aguirre Nestor Jaime , Palacio Jaime Alberto
Published: January 2024

The estimation of biomass of planktonic algae can be done by two methods, the quantification of geometric biovolume and chlorophyll a. This work which considers as environmental scenario the Ayapel-Cordoba flood-plain lake, introduces (presents) the two protocols for geometric biovolume and chlorophyll a quantification, and shows that both variables actually represent differences in biomass in space and time, also recording a high degree correlation. The results show that by using an appropriate extraction method for chlorophyll a, it is possible to have a quick and effective method for determining the biomass of algae that can be used to apply a trophic classification, which can also be obtained by counting and estimation microscopic geometric dimensions.
Virtual laboratory for simulation and learning of cardiovascular system function in BME studies
Authors: Hernández Valdivieso Alher Mauricio , Salazar Sánchez María Bernarda , Urrego Higuita David Alexander , Costa-Castelló Ramon , Mañanas Villanueva Miguel Ángel
Published: January 2024

The application of engineering system analysis is a very important field in biomedical engineering (BME) studies: modeling, simulation and control of the most important physiological systems. A virtual laboratory for the analysis and the study of human circulatory system is presented in this paper. This laboratory is based on the compilation of several mathematical models described in the literature. In addition, some model parameters have been tuned by means of experimental data under caffeine stimulus. The computational tool has been built using MATLAB/SIMULINK and EJS, so it combines good computation capabilities with interactivity. The virtual laboratory has been designed in order to understand the operation of the circulatory system under normal conditions, and to predict circulatory variables at different types and levels of stimuli and conditions.
JMat – Multiuser and remote calculation software tool for the problem based learning using Matlab
Authors: Bacca Cortes Bladimir , Caicedo Eduardo , Ramírez José
Published: January 2024

JMat is a software calculation tool developed on JAVA and EJS (Easy Java Simulations), client/server-based, multiuser support and remote access to Matlab. The main goal of the calculation software tool is to offer to remote users an interaction with Matlab using its three interfaces: Command Console, where users executes Matlab text commands; Work Space and Plotting, where automatically the remote user variables are stored and plotted individually; Functions and File Transfer, where users functions can be created, and data can be send or receive to and from a server. JMat requires an Internet access, a PC server with Matlab installed, and a client (WEB browser or stand-alone application). It is not necessary a Matlab on client side. Actually, JMat is being used at Universidad of Valle in courses like Automatic Process Control, Intelligent Control, Artificial Neural Networks, Signal Processing and Digital Image Processing as a tool for problem-based learning through the University of Valle’s eLearning platform.
Variogram and correlogram, two proposed estimators of the hydrological variability measurement
Authors: Gutiérrez-López Alfonso , Ramirez Aldo I. , Lebel Thierry , Santillán Oscar , Fuentes Carlos
Published: January 2024

The analysis of daily precipitation data of four climate stations in the Mexican states of Chiapas and Tabasco is presented in this paper. The period from August to November of 2007 was selected because of the big flood that severely affected the city of Villahermosa and its surroundings. The variograms and correlograms indicate that the produced precipitations are in fact far from its normal variability.
Morphometric features of a tropical flood plain lake (Hoyo swamp Los Bagres, Colombia)
Authors: Montoya Moreno Yimmy , Vélez Fabio , Aguirre Ramírez Néstor
Published: January 2024

In this paper the morphometric characteristics of Hoyo swamp’s in Los Bagres (Colombia) and the theoretical predictions made from these characteristics are presented. The swamp was characterized as a shallow system with a large area about the size of the water column, the shape of a convex conical depression without turning points in V shape, with a broad line development coast generating a high influence on the watershed ecosystem. It has a high value of the fetch and the dynamic radius and a low relative depth, factors which together foster wide track action for the wind, so that trend is expected to dip to the thermal stability of the water column (polimixis). From the standpoint of trophic state may be considered as mesotrophic floodplain, as it presents low values of transparency and light attenuation coefficient. It was found that it presents morphometric differences regarding water system which is a part, so it follows that each body within the complex has its own characteristics, which are not defined in the study of the central body.