bluuebunny/crossref_metadata_2025 huggingface dataset:
YouTube Videos and Informed Decision-Making About COVID-19 Vaccination: Successive Sampling Study (Preprint)
Authors: Basch Charles E , Basch Corey H , Hillyer Grace C , Meleo-Erwin Zoe C , Zagnit Emily A
Published: May 2021

BACKGROUND

Social media platforms such as YouTube are used by many people to seek and share health-related information that may influence their decision-making about COVID-19 vaccination.

OBJECTIVE

The purpose of this study was to improve the understanding about the sources and content of widely viewed YouTube videos on COVID-19 vaccination.

METHODS

Using the keywords “coronavirus vaccination,” we searched for relevant YouTube videos, sorted them by view count, and selected two successive samples (with replacement) of the 100 most widely viewed videos in July and December 2020, respectively. Content related to COVID-19 vaccines were coded by two observers, and inter-rater reliability was demonstrated.

RESULTS

The videos observed in this study were viewed over 55 million times cumulatively. The number of videos that addressed fear increased from 6 in July to 20 in December 2020, and the cumulative views correspondingly increased from 2.6% (1,449,915 views) to 16.6% (9,553,368 views). There was also a large increase in the number of videos and cumulative views with respect to concerns about vaccine effectiveness, from 6 videos with approximately 6 million views in July to 25 videos with over 12 million views in December 2020. The number of videos and total cumulative views covering adverse reactions almost tripled, from 11 videos with approximately 6.5 million (11.7% of cumulative views) in July to 31 videos with almost 15.7 million views (27.2% of cumulative views) in December 2020.

CONCLUSIONS

Our data show the potentially inaccurate and negative influence social media can have on population-wide vaccine uptake, which should be urgently addressed by agencies of the United States Public Health Service as well as its global counterparts.
Peer Review of “COVID-19 and Cybersecurity: Finally, an Opportunity to Disrupt?” (Preprint)
Authors: Chadwick David W
Published: May 2021

UNSTRUCTURED

This is a peer review report.
Augmented Reality in Pediatric Septic Shock Simulation: Randomized Controlled Feasibility Trial (Preprint)
Authors: Toto Regina L , Vorel Ethan S , Tay Khoon-Yen E , Good Grace L , Berdinka Jesse M , Peled Adam , Leary Marion , Chang Todd P , Weiss Anna K , Balamuth Frances B
Published: May 2021

BACKGROUND

Septic shock is a low-frequency but high-stakes condition in children requiring prompt resuscitation, which makes it an important target for simulation-based education.

OBJECTIVE

In this study, we aimed to design and implement an augmented reality app (PediSepsisAR) for septic shock simulation, test the feasibility of measuring the timing and volume of fluid administration during septic shock simulation with and without PediSepsisAR, and describe PediSepsisAR as an educational tool. We hypothesized that we could feasibly measure our desired data during the simulation in 90% of the participants in each group. With regard to using PediSepsisAR as an educational tool, we hypothesized that the PediSepsisAR group would report that it enhanced their awareness of simulated patient blood flow and would more rapidly verbalize recognition of abnormal patient status and desired management steps.

METHODS

We performed a randomized controlled feasibility trial with a convenience sample of pediatric care providers at a large tertiary care pediatric center. Participants completed a prestudy questionnaire and were randomized to either the PediSepsisAR or control (traditional simulation) arms. We measured the participants’ time to administer 20, 40, and 60 cc/kg of intravenous fluids during a septic shock simulation using each modality. In addition, facilitators timed how long participants took to verbalize they had recognized tachycardia, hypotension, or septic shock and desired to initiate the sepsis pathway and administer antibiotics. Participants in the PediSepsisAR arm completed a poststudy questionnaire. We analyzed data using descriptive statistics and a Wilcoxon rank-sum test to compare the median time with event variables between groups.

RESULTS

We enrolled 50 participants (n=25 in each arm). The timing and volume of fluid administration were captured in all the participants in each group. There was no statistically significant difference regarding time to administration of intravenous fluids between the two groups. Similarly, there was no statistically significant difference between the groups regarding time to verbalized recognition of patient status or desired management steps. Most participants in the PediSepsisAR group reported that PediSepsisAR enhanced their awareness of the patient’s perfusion.

CONCLUSIONS

We developed an augmented reality app for use in pediatric septic shock simulations and demonstrated the feasibility of measuring the volume and timing of fluid administration during simulation using this modality. In addition, our findings suggest that PediSepsisAR may enhance participants’ awareness of abnormal perfusion.
The influential factors of designing a telehealth system: Empirical evidences from OECD countries (Preprint)
Authors: Wang Fuhmei
Published: May 2021

BACKGROUND

Health services provided through the telecommunications system aim to improve the population’s health and well-being.

OBJECTIVE

This research aims to test (1) how socio-economic and health factors affect the provision of telehealth services, (2) how telehealth is associated with ageing communities.

METHODS

Applying OECD countries’ experiences this research uses a logistic regression model to establish a relationship between a binary outcome variable, adopting a telehealth system or not, and a group of explanatory variables.

RESULTS

Estimation results find: when the ratio of the elderly relative to the population exceeds 10 per cent, the probability of introducing telehealth services increases. Especially, when the ageing ratio exceeds 18 per cent, there is a clear demand for telehealth services in the community. With the current ageing ratio, 14.92 per cent, the probability of introducing a telehealth system is 0.84. If the per capita gross domestic products (GDP) exceeds 45000 US dollars, there is a definite demand for telehealth among the population. With the current income of 37930.15 US dollars per year, the probability of introducing a telehealth system into the community is 0.5. If the average propensity to consumption, the ratio of per capita consumption relative to per capita GDP, exceeds 0.73, the probability of introducing telehealth decreases to zero. With the current per capita consumption, 18931.98 US dollars per year, the possibility of introducing telehealth services is 0.5.The implications of these findings could be applicable to other countries to serve more deserving people.

CONCLUSIONS

We thus recommend more work be undertaken to reduce the cost of m-health or e-health in low-income countries. With affordable e-health services, the population’s health can be improved, which in turn will be associated with increases in productivity and per capita income. The average propensity to consumption on subsistence will decrease and the implementation of a telehealth system could be made possible.
Information Retrieval in an Infodemic: The Case of COVID-19 Publications (Preprint)
Authors: Teodoro Douglas , Ferdowsi Sohrab , Borissov Nikolay , Kashani Elham , Vicente Alvarez David , Copara Jenny , Gouareb Racha , Naderi Nona , Amini Poorya
Published: May 2021

BACKGROUND

The COVID-19 global health crisis has led to an exponential surge in published scientific literature. In an attempt to tackle the pandemic, extremely large COVID-19–related corpora are being created, sometimes with inaccurate information, which is no longer at scale of human analyses.

OBJECTIVE

In the context of searching for scientific evidence in the deluge of COVID-19–related literature, we present an information retrieval methodology for effective identification of relevant sources to answer biomedical queries posed using natural language.

METHODS

Our multistage retrieval methodology combines probabilistic weighting models and reranking algorithms based on deep neural architectures to boost the ranking of relevant documents. Similarity of COVID-19 queries is compared to documents, and a series of postprocessing methods is applied to the initial ranking list to improve the match between the query and the biomedical information source and boost the position of relevant documents.

RESULTS

The methodology was evaluated in the context of the TREC-COVID challenge, achieving competitive results with the top-ranking teams participating in the competition. Particularly, the combination of bag-of-words and deep neural language models significantly outperformed an Okapi Best Match 25–based baseline, retrieving on average, 83% of relevant documents in the top 20.

CONCLUSIONS

These results indicate that multistage retrieval supported by deep learning could enhance identification of literature for COVID-19–related questions posed using natural language.
Choice of Behavioral Change Techniques in Health Care Conversational Agents: Protocol for a Scoping Review (Preprint)
Authors: Martinengo Laura , Lo Nicholas Y W , Goh Westin I W T , Tudor Car Lorainne
Published: May 2021

BACKGROUND

Conversational agents or chatbots are computer programs that simulate conversations with users. Conversational agents are increasingly used for delivery of behavior change interventions in health care. Behavior change is complex and comprises the use of one or several components collectively known as behavioral change techniques (BCTs).

OBJECTIVE

The objective of this scoping review is to identify the BCTs that are used in behavior change–focused interventions delivered via conversational agents in health care.

METHODS

This scoping review will be performed in line with the Joanna Briggs Institute methodology and will be reported according to the PRISMA extension for scoping reviews guidelines. We will perform a comprehensive search of electronic databases and grey literature sources, and will check the reference lists of included studies for additional relevant studies. The screening and data extraction will be performed independently and in parallel by two review authors. Discrepancies will be resolved through consensus or discussion with a third review author. We will use a data extraction form congruent with the key themes and aims of this scoping review. BCTs employed in the included studies will be coded in line with BCT Taxonomy v1. We will analyze the data qualitatively and present it in diagrammatic or tabular form, alongside a narrative summary.

RESULTS

To date, we have designed the search strategy and performed the search on April 26, 2021. The first round of screening of retrieved articles is planned to begin soon.

CONCLUSIONS

Using appropriate BCTs in the design and delivery of health care interventions via conversational agents is essential to improve long-term outcomes. Our findings will serve to inform the development of future interventions in this area.

INTERNATIONAL REGISTERED REPORT

PRR1-10.2196/30166
Themes Surrounding COVID-19 and Its Infodemic: Qualitative Analysis of the COVID-19 Discussion on the Multidisciplinary Healthcare Information for All Health Forum (Preprint)
Authors: Gangireddy Rakshith , Chakraborty Stuti , Pakenham-Walsh Neil , Nagarajan Branavan , Krishan Prerna , McGuire Richard , Vaghela Gladson , Sriharan Abi
Published: May 2021

BACKGROUND

Healthcare Information for All (HIFA) is a multidisciplinary global campaign consisting of more than 20,000 members worldwide committed to improving the availability and use of health care information in low- and middle-income countries (LMICs). During the COVID-19 pandemic, online HIFA forums saw a tremendous amount of discussion regarding the lack of information about COVID-19, the spread of misinformation, and the pandemic’s impact on different communities.

OBJECTIVE

This study aims to analyze the themes and perspectives shared in the COVID-19 discussion on English HIFA forums.

METHODS

Over a period of 8 months, a qualitative thematic content analysis of the COVID-19 discussion on English HIFA forums was conducted. In total, 865 posts between January 24 and October 31, 2020, from 246 unique study participants were included and analyzed.

RESULTS

In total, 6 major themes were identified: infodemic, health system, digital health literacy, economic consequences, marginalized peoples, and mental health. The geographical distribution of study participants involved in the discussion spanned across 46 different countries in every continent except Antarctica. Study participants’ professions included public health workers, health care providers, and researchers, among others. Study participants’ affiliation included nongovernment organizations (NGOs), commercial organizations, academic institutions, the United Nations (UN), the World Health Organization (WHO), and others.

CONCLUSIONS

The themes that emerged from this analysis highlight personal recounts, reflections, suggestions, and evidence around addressing COVID-19 related misinformation and might also help to understand the timeline of information evolution, focus, and needs surrounding the COVID-19 pandemic.
Analisis Hubungan Clinical Autonomy Terhadap Kepuasan Kerja Dokter Spesialis Obstetri dan Ginekologi Dalam Tindakan Seksio Sesarea Pada Sistem Jaminan Kesehatan Nasional
Authors: Mappaware Nasrudin Andi , Emilia Ova , Hadijono Soerjo , Malinta Umar , Hakimi Mohammad , Soetrisno Soetrisno , Tiro Eddy
Published: May 2021

Background: In Indonesia, the National Health Insurance System (NHIS) is an implementation of law No. 40 of 2004 on the National Social Insurance System in health sector with universal health coverage (UHC) concept. Therefore, the satisfaction of specialist’s work will be very influence towards hospital works. The previous research (Nasruddin, 2017) about factor analysis related to job satisfaction of doctor specialist for obstetrics and gynecology (SpOG) toward Sectio Caesarea (SC) on NHI showed that medical service (transparency and remuneration) and working condition have significant correlation towards work satisfaction of doctor SpOG in SC on NHI.    Objective: to analyze the correlation of clinical autonomy on job satisfaction of doctor SpOG on Sectio Caesarea on National Health Insurance system.Method: A quantitative research by applying analytic observational study with cross sectional design.Materials and Research: This research was conducted in Makassar. A number of sample was 73 doctors SpOG. Data was obtained by clinical autonomy questionnaire having been tested its validity and reliability. The result of the research was analyzed by using chi-square test.  Result: Based on the correlation of characteristics towards work satisfaction of doctor SpOG in SC on National Health Insurance system found that age category between 36 – 45 years old is satisfied, female is satisfied, working duration more than 5 years is dissatisfied and public hospital status is dissatisfied. There is no correlation between clinical autonomy in this case is control overwork (p = 0.170) and prerogative obtain need service (p = 0.240) on job satisfaction of doctor SpOG in Sectio Caesarea on National Health Insurance System.Conclusion: There is no relation between clinical autonomy on job satisfaction of doctor SpOG in Sectio Caesarea on National Health Insurance System. Even though the doctors SpOG are not satisfied with NHI (medical service and working condition) but the doctors are able to work professionally with clinical autonomy. Keywords: clinical autonomy, doctor SpOG, National Health Insurance System
Perbandingan Pemberian Parasetamol Oral dan Ketorolak Intravena dalam Membantu Keberhasilan Menyusui Pasca Seksio Sesarea
Authors: Fidina Dalri Nur , Attamimi Ahsanudin , Prawitasari Shinta
Published: May 2021

Tujuan: Penelitian ini bertujuan untuk membandingkan pemberian parasetamol 1000 mg oral dan injeksi ketorolak 30 mg intravena dalam mengatasi nyeri terhadap keberhasilan menyusui pasca seksio sesarea. Metode: Penelitian ini merupakan penelitian non blinding, randomized controlled trial yang membagi subyek penelitian menjadi 2 kelompok. Kelompok kontrol adalah kelompok yang mendapat injeksi ketorolak 30 mg intravena dan kelompok perlakuan adalah yang mendapat parasetamol 1000 mg per oral yang kemudian dinilai nyeri dengan VAS dan keberhasilan menyusui dengan skor LATCH pada 24 jam setelah seksio sesarea. Chi square serta risiko relatif dipakai untuk uji statistik untuk membandingan 2 proporsi. Hasil: Penelitian ini melibatkan 86 subjek. Pada pemberian parasetamol 1000 mg per oral dan ketorolak 30 mg intravena didapatkan hasil tidak perbedaan bermakna terhadap nyeri (RR 1,16; 95% CI 0,84-1,16). Angka keberhasilan menyusui pada kedua kelompok dengan efek tidak nyeri dan nyeri didapatkan hasil tidak berbeda bermakna secara statistik. Kesimpulan: Pemberian parasetamol 1000 mg per oral tidak berbeda bermakna dibandingkan dengan pemberian injeksi ketorolak 30 mg intravena terhadap nyeri dan keberhasilan menyusui pasca seksio sesarea.   Kata Kunci: parasetamol, ketorolak, seksio sesarea, keberhasilan menyusui, nyeri
Faktor yang Berhubungan dengan Penerimaan Alat Kontrasepsi Dalam Rahim Pascasalin di Samarinda
Authors: Pella Todungbua' Prima Derry , Cahyanti Ratnasari Dwi , Respati Supriyadi Hari
Published: May 2021

Background: Maternal mortality rate (MMR) in Indonesia is 305 per 100.000 live births. The intervention to suppress MMR according to four pillars of Safe Motherhood is reducing the possibility of woman becoming pregnant with Family Planning. The postpartum period is an important time to start, but underutilized. All contraceptive methods may be used, but the high rate of drop-out in non-long-term methods, counselling is directed to long-term methods like IUD.Objective: To determine factor that related postpartum IUD acceptance in Samarinda.Method: The research method is observational with cross sectional design. Sampling is done by purposive sampling. Data were obtained through questionnaire.Result: There was no significant association between age (p=0.438), parity (RR=0.7; p=0.077), education (RR=1.11; p=0.611), and income (RR=0.69; p=0.105)  with acceptance of postpartum IUD. Employment (RR=1.64; p=0.025), history of family planning counselling (RR=3.37; p<0.001), and husband's approval (RR=28.8; p=<0.001) have significant association with the acceptance of postpartum IUD.Conclusion: Age, parity, education, and income are not related factors of postpartum IUD acceptance, while employment, husband's approval, and history of family planning counselling are related factors of postpartum IUD acceptance in Samarinda.Keywords: Postpartum IUD, family planning counselling, husband's approval.
Kehamilan 33-34 Minggu dengan COVID-19 dalam Perspektif Medis, Bioetik, dan Islam
Authors: Mappaware Nasrudin Andi , Mursyid Muhammad , Syahril Erlin , Syam Feby Wahyuni
Published: May 2021

Latar belakang: Coronavirus disease 2019 (COVID-19) adalah penyakit yang menyebabkan pandemik global dan menjadi masalah kesehatan masyarakat yang serius. Sampai saat ini, pengetahuan tentang infeksi COVID-19 dalam hubungannya dengan kehamilan dan janin masih terbatas dan belum ada rekomendasi spesifik untuk penanganan ibu hamil dengan COVID-19.Objektif: Perempuan 28 tahun, kehamilan pertama dengan usia 34 minggu (preterm), masuk rumah sakit dengan keluhan batuk, demam dan sesak. Hasil foto thoraks gambaran pneumonia bilateral paru. Hasil swab dan rapid tes positif dan pasien diisolasi sebagai pasien terkonfirmasi COVID-19.Metode: Case studyHasil dan Pembahasan: Penanganan sesuai standar COVID-19 dan informed consent untuk terminasi kehamilan dengan rencana pematangan paru. Pengambilan keputusan terhadap masalah dan dilema etik dengan pendekatan medis, bioetika dan islam.Kesimpulan: Penanganan dan pengambilan keputusan klinik pada kasus kehamilan preterm dengan COVID-19 dengan berbagai dilema selain pertimbangan medis, diperlukan pendekatan bioetika dan nilai islam.Kata kunci: Kehamilan; COVID-19; preterm; medis; bioetika; islam
Hubungan peningkatan kadar progesteron pada saat pengambilan oosit terhadap keberhasilan Fertilisasi In Vitro
Authors: Silitonga Martha Chaterince , Widad Shofwal , Emilia Ova
Published: May 2021

Latar belakang:Fertilisasi In Vitro (FIV) semakin banyak digunakan dalam penanganan infertilitas di Indonesia. Banyak penelitian yang mempelajari pengaruh peningkatan kadar progesteron saat pengambilan oosit dalam keberhasilan FIV, namun hasil yang diperoleh masih bersifat kontroversi.Tujuan: Mengetahui hubungan peningkatan kadar hormon progesteron saat pengambilan oosit dengan keberhasilan FIV.Metode: Penelitian ini menggunakan metode kohort retrospektif melibatkan 210 siklus FIV dari Januari 2014 sampai Desember 2016. Subyek penelitian dibagi menjadi dua kelompok berdasarkan kadar progesteron saat pengambilan oosit. Kelompok pertama dengan kadar progesteron < 12 ng/ml sebanyak 151 subyek, sedangkan 59 lainnya masuk dalam kelompok dengan kadar progesteron ≥12 ng/ml. Luaran kehamilan dinilai dengan mengukur kadar hormon β-hCG.Hasil dan Pembahasan: Didapatkan hasil bahwa tidak ada perbedaan bermakna untuk luaran kehamlan antara kelompok dengan kadar progesteron rendah dan kadar progesteron tinggi (25,8% VS 23,7%; RR 0,67 IK 0,29-1,56, p>0,05). Pada analisis bivariat, terdapat peningkatan signifikan dari kadar estradiol pasca stimulasi dan jumlah folikel (RR 2,00 IK 1,57-2,55, p<0,0001 dan RR 1,86, IK 1,47-2,36, p<0,0001);  jumlah oosit (RR 1,99, IK 1,61-2,48, p<0,0001), dan jumlah embrio (RR 1,99 IK 1,62-2,43; p<0,0001) pada kelompok dengan kadar progesteron tinggi. Dari analisis multivariat, peningkatan jumlah oosit merupakan satu – satunya faktor yang secara signifikan meningkatkan rasio kehamilan pada FIV (RR 3,36 IK 1,04-10,87; p<0,05).Kesimpulan:Pada penelitian ini tidak terdapat perbedaan signifikan rasio kehamilan pada FIV dengan peningkatan kadar hormon progesteron pada pengambilan oosit. Jumlah oosit yang dipanen secara signifikan meningkatkan keberhasilan kehamilan pada FIV, dan jumlah oosit juga signifikan meningkat pada kelompok dengan kadar progesteron tinggi.Kata kunci: progesteron; oosit; Fertilisasi In Vitro
An introduction to the Cenozoic tectonics of the Japan arc
Authors: Yamaji A.
Published: May 2021

Aún cuando no se conoce con precisión la fecha en que comenzó la apertura del Mar del Japón, ésta probablemente comenzó hace Ma. La deformación del arco japonés entre y Ma hasta hace 5 Ma se llevó a cabo como una respuesta a su cabalgadura sobre la placa Pacífico. La colisión de la placa del Mar de Filipinas contra el SW de Japón (1) detuvo el esparcimiento tanto en el mar de Japón como en la Cuenca de Shikoku hace 15 Ma, (2) formó una junta triple de trincheras frente a las costas del Japón central y (3) dividió el arco en los arcos del SW y NE de Japón. El arco del SW de Japón ha estado sujeto a deformación compresional desde este evento, mientras que en el arco del SW y NE de Japón se llevo a cabo un cambio de deformación compresional a extensional que comenzó durante el Plioceno.
Termal history of the NE Japan frontal are since the Late Miocene inferred from vitrinite reflectante
Authors: Yamaji Atsushi
Published: May 2021

Se estima los gradientes paleogeotérmicos a partir de las relaciones reflectancia de vitrinita-profundidad (-z) para sedimentos del Mioceno Tardío en las áreas de Tanakura y Hirono del noreste de Japón. Ambas áreas se han situado en la región ante arco desde hace 15 Ma y no han sido afectadas por magmatismo. Estos sedimentos debieron haber sufrido disturbios térmicos locales limitados, y por ello resultan adecuados para estudiar las condiciones paleogeotérmicas a una escala regional. El levantamiento que se llevo a cabo en la región, entre el Mioceno Tardío y el Plioceno Temprano dio como resultado una discordancia angular entre las rocas miocénicas y pliocénicas y causó el enfriamiento de los sedimentos del Mioceno, lo que pudo haber retardado y detenido en forma efectiva el proceso de carbonización. Las relaciones -z de los sedimentos, por lo tanto, revelan el gradiente geotérmico entre la depositación y el destechamiento. El gradiente paleogeotérmico estimado es de 64Â±11° en el subsuelo fue mayor en el Mioceno Tardío que en el presente, debajo del ante-arco. Un enfriamiento de escala regional a través del arco parece haber tenido lugar a partir del Plioceno y durante todo el Cuaternario, tal como lo sugiere la firma geoquímica de las rocas volcánicas del frente volcánico (Ban et al., 1992). Un retroceso hacia el occidente del frente volcánico (Ohguchi et al., 1989) es consistente también con el enfriamiento regional.
Regional tectonics of western Mexico and its implications for the northern boundary of the Jalisco block
Authors: Ferrari Luca , Pasquare Giorgio , Venegas Saúl , Castillo Daniel , Romero Francisco
Published: May 2021

El rift Tepic-Zacoalco en el occidente de México se ha considerado como el resultado de un fallecimiento dextral y normal de dad Plio-Cuaternaria, producido a lo largo de la frontera norte del bloque de Jalisco debido a un proceso de riftogénesis que lo separa de la placa Norteaméricana. Estudios geológicos y estructurales de campo llevados a cabo en Nayarit y en Jalisco revelan que dicha frontera es más amplia de lo que se había considerado con anterioridad y que desde el Mioceno Tardío no había deformación transcurrente a lo largo de ésta. La estructura en la frontera cosiste de un sistema de semifosas y fosas tectónicas que se formaron en tiempos diferentes después de una fase transpresiva de edad Mioceno Medio. Parte de estas estructuras se formaron durante la separación de la Península de Baja California de la parte continental de México en el Mioceno Tardío- Plioceno Temprano. La tectónica extensional del Plioceno Tardío y Cuaternario está concentrada en la parte sur de la frontera y, de acuerdo con los datos microtectónicos, está caracterizada por un patrón del esfuerzo mínimo alineado NNE-SSW. Estos datos, combinados con la dirección de la extensión en el graben de Colima, indican un posible desplazamiento del bloque Jalisco hacia la trinchera. Nuestros resultados, en conjunto con estudios sísmicos y de movimientos de placas, hacen dudar de los modelos que hipotetizan un proceso de riftogénesis activo para el Plio-Cuaternario del bloque Jalisco. Sugerimos en cambio que la tectónica extensional a lo largo de las fronteras norte del bloque de Jalisco desde el Plioceno Tardío al Cuaternario podría ser un rasgo pasivo inducido por el movimiento diferencial de la placa Rivera con respecto a las placas adyacentes (placas de Cocos y Pacífico).
Características geoquímicas de las rocas volcánicas del sistema geotérmico Los Humeros, Puebla y su relación con la mineralogía de alteración
Authors: Martínez Serrano Raymundo G. , Alibert Chantal
Published: May 2021

Las rocas volcánicas presentes en el sistema geotérmico Los Humeros varían de andesitas-basálticas a riolitas con diferentes grados de alteración hidrotermal. Los estudios petrográficos realizados, aunados con análisis de difracción de Rayos X, permitieron determinar que los minerales de alteración son de diversos tipos; sin embargo, éstos se presentan en asociaciones paragenéticas indicadoras de temperaturas que varían de 150°a más de 300° C. Este rango de temperaturas coincide con el gradiente actual del sistema. La composición de elementos mayores y traza de las diversas unidades litológicas permite proponer que las rocas volcánicas de Los Humeros siguen un comportamiento evolutivo calcoalcalino con un ligero enriquecimiento en potasio. Ciertos elementos químicos (Zr, V, Ti o P), considerados como relativamente inmóviles bajo la acción hidrotermal, fueron utilizados en la estimación de la transferencia de masa ocurrida dentro de las rocas volcánicas del sistema. El uso de relaciones isotópicas 87Sr/86Sr como indicadores de la procedencia de ciertos constituyentes químicos puede ser de gran utilidad. En el caso de Los Humeros las rocas volcánicas y las calcitas hidrotermales presentan valores isotópicos similares (0.70414 promedio), lo cual indica que los constituyentes químicos del tipo Ca y Sr fueron derivados de fuentes magmáticas similares. Dichos valores isotópicos contrastan con los valores encontrados en las rocas carbonatadas del basamento (0.70730).
Analytical and numerical evaluation of one-dimensional transient stress release at Wellenber, Switzerland
Authors: Rivera Alfonso
Published: May 2021

Se observaron deficiencias de presión en pozos exploratorios en Wellenberg, Alpes Centrales, en el curso de estudios para un depósito de desechos radioactivos. En la Formación Valanginiana existen presiones de agua de hasta 600 m (6 MPa) por debajo de la hidrostática. De entre diversas hipótesis, ni el flujo regional ni los efectos químicos logran explicar este fenómeno, el que atribuimos a factores geomecánicos relacionados con la retirada de los glaciares. Las zonas de presión anómalas se reproducen bastante bien con el modelo, y las escalas de tiempo inferidas por la liberación de esfuerzos concuerdan con la ecuación de difusividad en una dimensión. Actualmente se disiparon 75-84% de los efectos de la perturbación y podrían pasar otros 20,000 - 30,000 años para que la presión se ajuste en 95-97% a las nuevas condiciones permanentes. Se concluye que el sitio de Wellenberg se encuentra bajo condiciones de hidrogeológico por causa de los cambios en la glaciación que continúan influenciando el sistema. Un análisis más avanzado en 2 y 3 dimensiones se ha efectuado con un modelo local y regional que incluye efectos transitorios (Rivera y Senger, 1993).
Frecuencia de hábitos bucales parafuncionales y su relación con el grupo etario.
Authors: Murrieta Pruneda José Francisco , Ramírez Márquez Mariana , Salgado Valdés Luis Enrique , Salamanca Torres Raquel
Published: May 2021

Objetivo. Evaluar la frecuencia de hábitos orales parafuncionales y su relación con dos grupos etarios. Material y Métodos: Se llevó a cabo un estudio transversal en una muestra de 269 preescolares, bajo autorización expresa de sus padres. La encuesta epidemiológica estuvo conformada por el examen bucal y la aplicación de un cuestionario (alfa de Cronbach=0,832), previa estandarización de una Cirujana Dentista (Kappa=0,941). Para medir la fiabilidad del cuestionario se calculó el valor del alfa de Cronbach y para las asociaciones la Chi cuadrada de Mantel y Haenszel para tablas de contingencia tetrateóricas. Resultados. El hábito de morder objetos fue el hábito más frecuente (31.2%), la onicofagia y la queilofagia mostraron diferencias estadísticamente significativas en relación con el grupo de preescolares (X2MH= 7.267, p=0.007; X2MH=4.046, p=0.044), mientras que el uso de biberón lo fue para el grupo maternal (X2MH=13.825, p=0.0001). Por sexo no se encontraron diferencias relevantes entre niños y niñas. Conclusiones. Se evidenciaron algunas diferencias en cuanto al comportamiento de los casos de este tipo de hábitos sin que el sexo resultara ser un factor relevante en la presencia de algún tipo de hábito parafuncional.
University strategic planning and the impartation of technopreneurship skills to students: Literature review
Authors: Bomani Mapeto , Gamariel Gladys , Juana James
Published: May 2021

The Fourth Industrial Revolution (FIR) has ushered in an era in which technopreneurship is central to economic development. Universities are viewed as critical conduits for imparting technopreneurship skills to university students (Cereijo, as cited in Suradi, Yasin, & Rasul, 2017), and this should be reflected in the university’s strategic plan. The purpose of this conceptual paper is to explore the nexus between university strategic planning and the impartation of technopreneurship skills to science, technology, engineering and mathematics (STEM) students in Sub Saharan Africa. Methodologically, the paper adopted an integrative approach in reviewing, critiquing, and synthesising scholarly literature on the link between strategic planning and the impartation of technopreneurship skills in STEM universities. This paper argues that strategic planning has an impact on the transfer of technopreneurship skills to students. A university’s strategic plan defines its future direction, provides a coherent basis for decision-making, and establishes priorities (Albon, Iqbal, & Pearson, 2016). Hence, it influences the procurement and allocation of resources, courses to be taught and pedagogical approaches to be adopted. This paper contributes to knowledge by suggesting that strategic planning in STEM universities should encompass technology and entrepreneurship in the vision, mission, and strategic goals.
Portal vein Gas detected by Point of care ultrasound
Authors: Bitar zouheir , Elhabibi Mohamed , Maadarani Ossama , Albirami Ali , Elzoueiry Mahmoud , Zaalouk Tamer
Published: May 2021

Portal venous gas can be detected by a bedside point of care ultrasound
examination. We present the case of a 73-year-old female with advanced
ischemic cardiomyopathy. She developed vague abdominal pain. Her
findings were consistent with portal venous gas with point-of-care
ultrasound. She had nonobstructive mesenteric ischemia.
A BSSE-free second-order perturbation theory from Hermitian CHA-SCF Canonic Orbitals
Authors: Sedano Pedro Salvador , Mayer Istvan
Published: May 2021

We present an alternative perturbational approach free of basis set
superposition error (BSSE) within the framework of the Chemical
Hamiltonian Approach (CHA). The new formulation (CHA-S-MP2) is based on
canonic (and orthogonal) CHA orbitals obtained from a hermitized CHA
Fock operator. The final expression shows a considerable simplification
of the method as compared to the previous CHA-MP2 formalism. In the
present formulation only two four-index transformations are necessary so
that the computational cost of the CHA-S-MP2 calculation is just twice
that of a conventional uncorrected MP2 calculation. Also, contrary to
the counterpoise method, the computational cost doesn’t depend on the
number of interacting fragments. Numerical full geometry optimizations
of water and hydrogen fluoride dimers and potential energy surfaces for
helium and argon dimers for several basis sets are presented. The
present method is compared to both the counterpoise and previous CHA-MP2
BSSE correction schemes, showing a remarkable agreement between all
three methods. However, the wrong behavior using the aug-cc-pVDZ basis
set indicates that the present method is not as robust as the original
non-hermitian CHA-MP2 formulation.
Blow-up Solutions For a Thin-Film Equation With Strong Damping And Nonlocal Source Terms
Authors: Polat Mustafa
Published: May 2021

In this note, we consider a modified thin-film equation including a
strong damping term together with a non-local source term. The problem
is considered under the periodic boundary conditions and a finite time
blow-up result is established for the case of positive initial energy.
Also a lower bound estimate for the blow-up time is obtained.
An assessment of terminology for intra-specific diversity, with a focus on “ecotypes” and “life histories”
Authors: Clemens Benjamin , Schreck Carl
Published: May 2021

Understanding and preserving intra-specific diversity (ISD) is important
for species conservation. However, ISD units do not have taxonomic
standards and are not universally recognized. The terminology used to
describe ISD is varied and often used ambiguously. We compared classical
and authoritative definitions of terms used to describe ISD with terms
used in recent studies of three fish taxa: sticklebacks
(Gasterosteidae), Pacific salmon and trout (Oncorhynchus spp., “PST”),
and lampreys (Petromyzontiformes). Our review revealed the
terminological ambiguity of “races” and “subspecies”, found similar
definitions of “subspecies” and “ecotype”, and of “ecotype” and
“reaction norms”. “Species pairs” describes two phenotypes; however,
in some situations more than one phenotype may occur. “Ecotype” was
originally used to describe patterns in genes and ecology, and recent
studies employing this term tend to report a genetic basis in ISD.
Ecotype is used most frequently in genetic- and evolution-based
journals. By contrast, “life history” includes biological parameters
that affect population growth and decline, and this term tends to be
used in organismal- and ecology-based journals. When the genetic or
demographic components of ISD are not well understood, a conservative
approach would be to refer to expressions of this diversity as
“phenotypes”. The nature of human interests in particular taxa could
influence how these organisms are studied, and hence the ways in which
their ISD is understood, described, and conserved.
Complex landscape topography can facilitate local adaptation during a range shift
Authors: Fitt Robert , Lancaster L. T.
Published: May 2021

Warming climates provide many species the opportunity to colonise
newly-suitable regions at higher latitudes and elevations. Despite
becoming warmer, higher latitudes and elevations nevertheless offer
novel climatic challenges, such as greater thermal variability and
altered frequency of weather events, and these challenges exert
selection on expanding populations. However, high gene flow and genetic
drift during the expansion phase may limit the degree to which species
can adapt to novel climatic conditions at the range front. Here we
examine how landscape topographic complexity influences the opportunity
for local adaptation to novel conditions during a range shift. Using
RAD-seq data, we investigated whether elevation, latitude, climatic
niche differentiation, and gene flow across a complex landscape were
associated with signatures of adaptation during recent range expansion
of the damselfly Ischnura elegans in Northeast Scotland. Our data
revealed two distinct routes of colonisation, with admixture between
these routes resulting in increased heterozygosity and population
density. Expansion rates, assessed as directional rates of gene flow,
were greater between more climatically similar sites than between
climatically divergent sites. Significant genetic structure and allelic
turnover was found to emerge near the range front at sites characterised
by high elevation, low directional gene flow, and high spatial
differentiation in climate regimes. This predictive combination of
factors suggests that landscape complexity may be a prerequisite for
promoting differentiation of populations, and providing opportunities
for local adaptation, during rapid or contemporary range shifts
Coronary Artery-Pulmonary Artery Fistula in Pulmonary Atresia With Ventricular Septal Defect; Report of 2 Surgical Cases
Authors: Çakmak Arif Yasin , Yurdakök Okan , Yücel İlker , Aydemir Numan , Sasmazel Ahmet
Published: May 2021

Pulmonary atresia with ventricular septal defect (PA-VSD) is a
congenital complex cardiac anomaly. The blood supply to the lungs can be
from patent ductus arteriosus (PDA), major aortopulmonary collateral
artery (MAPCA) or in very rare cases from coronary artery-pulmonary
artery fistula (CAPAF). We had coronary artery-pulmonary artery fistula
(CAPAF) in 2 patients which had surgical intervention. In our first
patient which was operated 10 years ago, the main pulmonary artery had a
source from LMCA. In second patient, the right pulmonary artery derived
from LMCA and advanced to the right lung from the posterior of the aorta
and the left pulmonary artery was coming out of the PDA.
Effect of Stirring Intervals on Biogas Production from Cow Dung and Maize Silage Mix Ratio
Authors:   School of Natural Resources & Environmental Studies, Department of Agriculture, University of Juba, P.O. Box 82, Juba, South Sudan, Chol Monyluak M.Y. , Muchuka Nicasio M. ,   Department of Electrical and Control Engineering, Egerton University, P.O. Box 536 – 20115, Egerton, Kenya, Nyaanga Daudi M. ,   Department of Agricultural Engineering, Egerton University, P.O. Box 536 – 20115, Egerton, Kenya
Published: May 2021

Most biogas plants’ poor performance may be attributed to inadequate stirring strategy. The study evaluated the effect of stirring intervals on biogas production from cow dung and maize silage mixture (at mixed ratio 3:1) digested in a 0.15m3 laboratory digester at 30℃. SIEMENS LOGO PLC and ATV12HU15M2 Drive automatically controlled the stirring of 100 rpm for 3minutes at intervals of 1hour, 2hours, 6hours and 12hours with no stirring as control. The stirring intervals showed a significant effect on biogas production (P≤0.05) with 6hours and 12hours increased biogas by 3.11% and 1.48%, and the methane increase of 8.77% and 1.75%, respectively. The 2hours and 1hour reduced biogas by 26.5% and 39.35%, and methane decreased by 3.52% and 15.79%, respectively compared to control (implying that the frequent stirring is not good for biogas). The stirring interval of 6hours is thus recommended for 0.15m3 laboratory batch reactor of cow dung and maize silage.
The Research of Latvian Language Competence of Secondary Education Institution Graduates for Career Development
Authors:   University of Latvia, Anspoka Zenta
Published: May 2021

The topicality of the research is related to the goal of education to help a pupil to become a proficient language user who has acquired not only the basic skills of the language, but also understanding of the role of the Latvian language as the state language in the integration of the society, formation of national identity and cultural-historical heritage preservation. The aim of the study is to analyse Latvian language competence of graduates of Latvian language of instruction, minority secondary education institutions and state gymnasiums of Kurzeme, Latgale and Riga for their readiness for further career development. The methodology of the research is the outcome of the career development and sociolinguistic and linguo-didactic theories, which are based on the cognitive constructivist approach. The results of the empirical research are obtained from 409 texts of judgments systematized in the balanced corpus of modern Latvian language texts within the framework of the National Research Programme “Latvian Language” (No VPP-IZM-2018/2-0002). Language competence of graduates from secondary education institutions is low. It is affected by the linguistic environment, attitude towards language as an economic and social value, its learning motivation and insufficiency in language didactics. The research outcomes outline several important aspects for the improvement of the Latvian language didactics.
Video Sketches as a Means of Introducing Blended Learning Approach in Teaching Foreign Languages at Technical Universities
Authors:   Peter the Great St. Petersburg Polytechnic University, Burakova Daria , Sheredekina Oksana ,   Peter the Great St. Petersburg Polytechnic University, Bernavskaya Maya ,   Peter the Great St. Petersburg Polytechnic University, Timokhina Elena
Published: May 2021

The topicality of the article is determined by the widespread use of blended learning approaches in higher education, especially in studying foreign languages. With the limited number of classroom hours proposed for teaching foreign languages at technical universities, it became very relevant to introduce various alternative out-of-class monitoring methods. The aim of the research is to investigate the effectiveness of introducing video sketches as the way to improve the process of foreign language studying at technical universities. The authors assume that recording video monologues could facilitate students’ speaking abilities, reduce the level of their anxiety compared to delivering monologues in class and could stimulate the effective use of classroom hours for teaching foreign languages. To prove this hypothesis the authors of the study conducted an experiment in Peter the Great St. Petersburg Polytechnic University during the autumn term of 2019-2020 academic year with the total number of 232 participants randomly chosen from 1-course students of technical specialties with different levels of English language proficiency. The possibility to record a monologue instead of delivering it face-to-face was considered as the IV (independent variable) of the experiment. Such research method as an open-close questionnaire was used afterwards to identify the students’ satisfaction with the proposed alternative as well as the analysis of the exam results at the end of the course. These results as the part of the students’ academic performance represented the DV (dependent variable) of the experiment. The obtained data showed that students of the experimental group passed their exam significantly better than the students of the control group. Thus, the present survey proved that students of the experimental group would prefer to record video sketches instead of delivering monologues face to face and that making video monologues improved their fluency and helped overcome some psychological barriers. On the basis of the research and the results obtained during the experiment, the authors conclude that the application of video monologues in the process of teaching foreign languages is highly promising.
Linear Functional Graphs ‒ a Data Arrangement and Visualization Tool for Linear Algebra
Authors:   Daugavpils University, Daugulis Peteris , Sondore Anita ,   Daugavpils University
Published: May 2021

Visualization and mappings of mathematical data and transformations to geometric objects are important tools in any area of mathematics. Directed graphs have been used in linear algebra since D. König in the early 20th century. In this paper, we aim to give interpretations of such graphs and related data arrangements which project linear algebra to graph theory ‒ definitions of linear functional graphs. The results were obtained by applying discrete modelling techniques to objects of linear algebra. Linear functional graphs can be used in linear algebra courses to teach the theory of linear mappings, matrix multiplication and determinants. This technique can make linear algebra learning visual and suitable for some learners.
Partial annular pancreas in a 12-year-old girl
Authors: Savic Djordje , Prokic Dragan , Grujic Blagoje , Vukadin Miroslav , Milojkovic-Marinovic Vesna , Rasic Petar , Milickovic Maja
Published: May 2021

Introduction. Annular pancreas is a rare congenital anomaly in which a band of the pancreatic tissue, in continuity with the pancreatic head, completely or incompletely surrounds the descending part of the duodenum. An abnormal pancreatic development can cause complete annular pancreas, partial annular pancreas, and pancreas divisum. Complete annular pancreas is diagnosed in newborns, while the diagnosis of the partial annular pancreas is more frequently established in adults. The most reliable diagnostic methods are computed tomography and magnetic resonance cholangiopancreatography. The anomaly is treated surgically, using bypass procedures. Case report. A 12-year-old girl presented malnourished, with occasional feeding problems, vomiting, heartburn, and pain from infancy. The upper gastrointestinal series showed an extremely dilated stomach, the first and the second part of the duodenum. An endoscopic exam revealed the dilated stomach, pylorus, and the first and the second part of the duodenum with retained contrast, while the entrance of the endoscope into the third part of the duodenum was not possible. Computed tomography showed pancreatic tissue encircling the second part of the duodenum and the characteristic "crocodile jaw" sign. Roux-en-Y duodenojejunostomy was performed as a bypass procedure. Conclusion. The complete annular pancreas is a well-known and easily diagnosed anomaly in newborns. The partial annular pancreas is often poorly recognized, especially in patients who do not present with marked duodenal obstruction. Unrevealed, it causes chronic problems in food intake, with possible serious complications. Although a very rare condition in the pediatric population, partial annular pancreas should be taken into consideration in unclear cases of chronic poor oral food intake and vomiting.