bluuebunny/crossref_metadata_2025 huggingface dataset:
An Ostomy Self-management Telehealth Intervention for Cancer Survivors: Technology-Related Findings From a Randomized Controlled Trial
Authors: Weinstein Ronald S , Holcomb Michael J , Mo Julia , Yonsetto Peter , Bojorquez Octavio , Grant Marcia , Wendel Christopher S , Tallman Nancy J , Ercolano Elizabeth , Cidav Zuleyha , Hornbrook Mark C , Sun Virginia , McCorkle Ruth , Krouse Robert S
Published: May 2021

Background

An Ostomy Self-management Telehealth (OSMT) intervention by nurse educators and peer ostomates can equip new ostomates with critical knowledge regarding ostomy care. A telehealth technology assessment aim was to measure telehealth engineer support requirements for telehealth technology–related (TTR) incidents encountered during OSMT intervention sessions held via a secure cloud-based videoconferencing service, Zoom for Healthcare.

Objective

This paper examines technology-related challenges, issues, and opportunities encountered in the use of telehealth in a randomized controlled trial intervention for cancer survivors living with a permanent ostomy.

Methods

The Arizona Telemedicine Program provided telehealth engineering support for 105 OSMT sessions, scheduled for 90 to 120 minutes each, over a 2-year period. The OSMT groups included up to 15 participants, comprising 4-6 ostomates, 4-6 peer ostomates, 2 nurse educators, and 1 telehealth engineer. OSMT-session TTR incidents were recorded contemporaneously in detailed notes by the research staff. TTR incidents were categorized and tallied.

Results

A total of 97.1% (102/105) OSMT sessions were completed as scheduled. In total, 3 OSMT sessions were not held owing to non–technology-related reasons. Of the 93 ostomates who participated in OSMT sessions, 80 (86%) completed their OSMT curriculum. TTR incidents occurred in 36.3% (37/102) of the completed sessions with varying disruptive impacts. No sessions were canceled or rescheduled because of TTR incidents. Disruptions from TTR incidents were minimized by following the TTR incident prevention and incident response plans.

Conclusions

Telehealth videoconferencing technology can enable ostomates to participate in ostomy self-management education by incorporating dedicated telehealth engineering support. Potentially, OSMT greatly expands the availability of ostomy self-management education for new ostomates.

Trial Registration

ClinicalTrials.gov NCT02974634; https://clinicaltrials.gov/ct2/show/NCT02974634
Audiovisual Content for a Radiology Fellowship Selection Process During the COVID-19 Pandemic: Pilot Web-Based Questionnaire Study
Authors: Godoy Ivan Rodrigues Barros , Neto Luís Pecci , Skaf Abdalla , Leão-Filho Hilton Muniz , Freddi Tomás De Andrade Lourenço , Jasinowodolinski Dany , Yamada André Fukunishi
Published: May 2021

Background

Traditional radiology fellowships are usually 1- or 2-year clinical training programs in a specific area after completion of a 4-year residency program.

Objective

This study aimed to investigate the experience of fellowship applicants in answering radiology questions in an audiovisual format using their own smartphones after answering radiology questions in a traditional printed text format as part of the application process during the COVID-19 pandemic. We hypothesized that fellowship applicants would find that recorded audiovisual radiology content adds value to the conventional selection process, may increase engagement by using their own smartphone device, and facilitate the understanding of imaging findings of radiology-based questions, while maintaining social distancing.

Methods

One senior staff radiologist of each subspecialty prepared 4 audiovisual radiology questions for each subspecialty. We conducted a survey using web-based questionnaires for 123 fellowship applications for musculoskeletal (n=39), internal medicine (n=61), and neuroradiology (n=23) programs to evaluate the experience of using audiovisual radiology content as a substitute for the conventional text evaluation.

Results

Most of the applicants (n=122, 99%) answered positively (with responses of “agree” or “strongly agree”) that images in digital forms are of superior quality to those printed on paper. In total, 101 (82%) applicants agreed with the statement that the presentation of cases in audiovisual format facilitates the understanding of the findings. Furthermore, 81 (65%) candidates agreed or strongly agreed that answering digital forms is more practical than conventional paper forms.

Conclusions

The use of audiovisual content as part of the selection process for radiology fellowships is a new approach to evaluate the potential to enhance the applicant’s experience during this process. This technology also allows for the evaluation of candidates without the need for in-person interaction. Further studies could streamline these methods to minimize work redundancy with traditional text assessments or even evaluate the acceptance of using only audiovisual content on smartphones.
Using an Optimized Generative Model to Infer the Progression of Complications in Type 2 Diabetes Patients (Preprint)
Authors: Wang Xiaoxia , Tang Chunlei , He Yanming , Plasek Joseph M. , Xiong Yun , Zhu Yangyong , Bates David W. , Zhou Li
Published: May 2021

BACKGROUND

People with type 2 diabetes have few symptoms, if any, and don’t discover their condition until complications develop. However, little is known about the progression of complications in type 2 diabetes due to data defects in electronic health records (e.g., incomplete records, discrete observation, irregular visits, and progression heterogeneity).

OBJECTIVE

The aim of this study was to optimize a generative model to infer the stage of onset of associated complications in patients with type 2 diabetes.

METHODS

Our study utilized real world longitudinal electronic health record (EHR) data from 9,298 patients across an 11-year timespan from a 17-hospital-based regional healthcare delivery network in Shanghai, China who were diagnosed with type 2 diabetes or prediabetic. We used an optimized generative Markov-Bayesian-based model to generate 5000 synthetic illness trajectories, which were manually reviewed by endocrinologists.

RESULTS

Our optimizations using anchor information to set model parameters perfected highly sparse, noisy irregular, and over discrete EHRs, to be a specified number of entire illness trajectories coped with diabetes-related complications. Given a target stage, it is straightforward to infer the risks of any complications at other stages, not merely transitioning from an earlier state to a later state but from a later state to an earlier state.

CONCLUSIONS

Synthetic patient trajectories simulated by the generative model can counter a lack of real world evidence of desired longitudinal timeframe while offering a strong level of privacy through a lower risk of identifying real patients.
Peer Review of “COVID-19 and Cybersecurity: Finally, an Opportunity to Disrupt?” (Preprint)
Authors:   Anonymous
Published: May 2021

UNSTRUCTURED

This is a peer review report.
Authors' Response to Peer Reviews of “COVID-19 and Cybersecurity: Finally, an Opportunity to Disrupt?” (Preprint)
Authors: Ferreira Ana , Cruz-Correia Ricardo
Published: May 2021

UNSTRUCTURED

This is the authors' response to the peer reviews.
Digital Interventions to Promote Healthy Eating in Children: Umbrella Review (Preprint)
Authors: Prowse Rachel , Carsley Sarah
Published: May 2021

BACKGROUND

eHealth and web-based service delivery have become increasingly common during the COVID-19 pandemic. Digital interventions may be highly appealing to young people; however, their effectiveness compared with that of the usual face-to-face interventions is unknown. As nutrition interventions merge with the digital world, there is a need to determine the best practices for digital interventions for children.

OBJECTIVE

The aim of this study is to examine the effectiveness of digital nutrition interventions for children on dietary outcomes compared with status quo interventions (eg, conventional face-to-face programming or nondigital support).

METHODS

We conducted an umbrella review of systematic reviews of studies assessing primary research on digital interventions aimed at improving food and nutrition outcomes for children aged <18 years compared with conventional nutrition education were eligible for inclusion.

RESULTS

In total, 11 systematic reviews published since 2015 were included (7/11, 64%, were of moderate quality). Digital interventions ranged from internet, computer, or mobile interventions to websites, programs, apps, email, videos, CD-ROMs, games, telehealth, SMS text messages, and social media, or a combination thereof. The dose and duration of the interventions varied widely (single to multiple exposures; 1-60 minutes). Many studies have been informed by theory or used behavior change techniques (eg, feedback, goal-setting, and tailoring). The effect of digital nutrition interventions for children on dietary outcomes is small and inconsistent. Digital interventions seemed to be the most promising for improving fruit and vegetable intake compared with other nutrition outcomes; however, reviews have found mixed results.

CONCLUSIONS

Owing to the heterogeneity and duration of digital interventions, follow-up evaluations, comparison groups, and outcomes measured, the effectiveness of these interventions remains unclear. High-quality evidence with common definitions for digital intervention types evaluated with validated measures is needed to improve the state of evidence, to inform policy and program decisions for health promotion in children. Now is the time for critical, robust evaluation of the adopted digital interventions during and after the COVID-19 pandemic to establish best practices for nutrition interventions for children.

CLINICALTRIAL
Writing Practices Associated With Electronic Progress Notes and the Preferences of Those Who Read Them: Descriptive Study (Preprint)
Authors: Payne Thomas H , Keller Carolyn , Arora Pallavi , Brusati Allison , Levin Jesse , Salgaonkar Monica , Li Xi , Zech Jennifer , Lees A Fischer
Published: May 2021

BACKGROUND

Hospital progress notes can serve as an important communication tool. However, they are criticized for their length, preserved content, and for the time physicians spend writing them.

OBJECTIVE

We aimed to describe hospital progress note content, writing and reading practices, and the preferences of those who create and read them prior to the implementation of a new electronic health record system.

METHODS

Using a sample of hospital progress notes from 1000 randomly selected admissions, we measured note length, similarity of content in successive daily notes for the same patient, the time notes were signed and read, and who read them. We conducted focus group sessions with note writers, readers, and clinical leaders to understand their preferences.

RESULTS

We analyzed 4938 inpatient progress notes from 418 authors. The average length was 886 words, and most were in the Assessment & Plan note section. A total of 29% of notes (n=1432) were signed after 4 PM. Notes signed later in the day were read less often. Notes were highly similar from one day to the next, and 26% (23/88) had clinical risk associated with the preserved content. Note content of the highest value varied according to the reader’s professional role.

CONCLUSIONS

Progress note length varied widely. Notes were often signed late in the day when they were read less often and were highly similar to the note from the previous day. Measuring note length, signing time, when and by whom notes are read, and the amount and safety of preserved content will be useful metrics for measuring how the new electronic health record system is used, and can aid improvements.
Exploring Changes to the Actionability of COVID-19 Dashboards Over the Course of 2020 in the Canadian Context: Descriptive Assessment and Expert Appraisal Study (Preprint)
Authors: Barbazza Erica , Ivanković Damir , Wang Sophie , Gilmore Kendall Jamieson , Poldrugovac Mircha , Willmington Claire , Larrain Nicolas , Bos Véronique , Allin Sara , Klazinga Niek , Kringos Dionne
Published: May 2021

BACKGROUND

Public web-based COVID-19 dashboards are in use worldwide to communicate pandemic-related information. Actionability of dashboards, as a predictor of their potential use for data-driven decision-making, was assessed in a global study during the early stages of the pandemic. It revealed a widespread lack of features needed to support actionability. In view of the inherently dynamic nature of dashboards and their unprecedented speed of creation, the evolution of dashboards and changes to their actionability merit exploration.

OBJECTIVE

We aimed to explore how COVID-19 dashboards evolved in the Canadian context during 2020 and whether the presence of actionability features changed over time.

METHODS

We conducted a descriptive assessment of a pan-Canadian sample of COVID-19 dashboards (N=26), followed by an appraisal of changes to their actionability by a panel of expert scorers (N=8). Scorers assessed the dashboards at two points in time, July and November 2020, using an assessment tool informed by communication theory and health care performance intelligence. Applying the nominal group technique, scorers were grouped in panels of three, and evaluated the presence of the seven defined features of highly actionable dashboards at each time point.

RESULTS

Improvements had been made to the dashboards over time. These predominantly involved data provision (specificity of geographic breakdowns, range of indicators reported, and explanations of data sources or calculations) and advancements enabled by the technologies employed (customization of time trends and interactive or visual chart elements). Further improvements in actionability were noted especially in features involving local-level data provision, time-trend reporting, and indicator management. No improvements were found in communicative elements (clarity of purpose and audience), while the use of storytelling techniques to narrate trends remained largely absent from the dashboards.

CONCLUSIONS

Improvements to COVID-19 dashboards in the Canadian context during 2020 were seen mostly in data availability and dashboard technology. Further improving the actionability of dashboards for public reporting will require attention to both technical and organizational aspects of dashboard development. Such efforts would include better skill-mixing across disciplines, continued investment in data standards, and clearer mandates for their developers to ensure accountability and the development of purpose-driven dashboards.
Hubungan Status ASI Eksklusif dan Pemberian Kolostrum dengan Kejadian Autisme pada Anak di Bawah 10 tahun
Authors: Khaerina Umi , Herini Siti , Ismail Djauhar
Published: May 2021

Background: The cause of autism until now is still not exactly known. One of the efforts in preventing the occurrence of autism is intervention early with giving colostrum and exclusive breastfeeding. The number of autism in Indonesia according to data released by the Central Bureau of Statistics in 2010 was estimated at 2.4 million people. Based on data from autism special school Bina Anggita Yogyakarta, recorded increase in the number of students from the beginning of the school in 2001 were 15 students, in 2009 the number increased to 32 students and in 2013 were 45 students.Objective: To determine the relationship between the status of exclusive breastfeeding and giving colostrum to the incidence of autism in children under 10 years.Methods: This research is a quantitative study with a matched case control study design. Subjects were children aged under 10 years who consisted of children with autism were 19 cases and 19 controls for normal children in Yogyakarta. The independent variable in this study in the provision of colostrum and exclusive breastfeeding, and dependent variable was autism. The counfounding variables are gastrointestinal infections, low birth weight and maternal age. Retrieval of data collected using a questionnaire. Univariable data analysis using frequency distribution, bivariate statistics using the McNemar test, multivariable analysis was not performed because the bivariate analysis, all variables are not significantly.Results: Of the five variables that were related to the occurrence of autism, five variables are not statistically significant and two variables that increase the risk of autism gastrointestinal infection (p=0,09 OR 3,5 CI 95%; 0,66-34,53) and low birth weight (p=0,17 OR 4 CI 95%; 0,39-196,9).Conclusions: There was no significant relationship between the giving of colostrum, exclusive breastfeeding and maternal age, but clinical gastrointestinal infection and low birth weight were risk factor  of autism. Keywords: Colostrum, exclusive breastfeeding, autism.
Pengaruh Sapa Orangtua Remaja Terhadap Pengetahuan, Sikap dan Perilaku Oangtua tentang Pendidikan Kesehatan Reproduksi
Authors: Widiyastuti Dyah , Nurcahyani Lia
Published: May 2021

ABSTRAK Latar belakang : Seks pranikah merupakan masalah yang rentan terjadi pada remaja. Salah satu penyebabnya adalah kurangnya pengetahuan tentang kesehatan reproduksi. Pendidikan kesehatan reproduksi sangat penting, tetapi mayoritas orangtua memiliki pengetahuan kurang serta persepsi negatif terhadap kesehatan reproduksi remaja.Tujuan : Menganalisis perbedaan pengetahuan, sikap dan perilaku orangtua sebelum dan setelah diberikan intervensi Sapa Orangtua Remaja.Metode : Rancangan penelitian quasi experimental non randomized pre test  and post test one group design. Subjek penelitian ini adalah 35 orangtua siswa Sekolah Dasar Pamitran Kota Cirebon dengan kriteria inklusi dan eksklusi.  Instrumen penelitian meliputi kuesioner dan modul Sapa Orang Tua Remaja . Analisis data menggunakan uji wilcoxon dan paired t-test.Hasil dan pembahasan : Terdapat perbedaan yang bermakna pengetahuan sikap dan perilaku orang tua sebelum dan setelah intervensi (p value 0,003 ; 0,000 dan 0,013).Kesimpulan : Sapa orangtua remaja dapat meningkatkan pengetahuan, sikap dan perilaku orangtua tentang kesehatan reproduksi remaja.
Luaran Transfer Embrio Simpan Beku pada Pasien Endometriosis Pasca Operasi dan Non Endometriosis yang Menjalani IVF di Klinik Permata Hati RSUP Dr. Sardjito
Authors: Fatmawati Rina , Widad Shofwal , Dewanto Agung
Published: May 2021

Background: Endometriosis is a chronic condition that is influenced by the hormone estrogen which affects women of childbearing age, and is associated with pelvic pain and infertility. In Vitro Fertilization (IVF) is currently the most efficient assisted reproductive technology and its high success rate is often done for infertility therapy in women associated with endometriosisObjective: The aim of this study is to determine whether postoperative endometriosis affected pregnancy outcomes in patients underwent frozen embryo transfer in IVF / ICSI programs.Method: This Research is done with a retrospective cohort design. The data was taken from medical records, research subjects who met the inclusion and exclusion criteria. The research data was collected, processed and analyzed using SPSS 23. Univariate, bivariate and multivariate data analysis was carried out to determine the effect between variablesResult: There were 458 research subjects in this study. Endometriosis patients were 119 subjects (26%). 57 subjects were categorized as minimum-mild endometriosis (47.9%) and moderate-severe subjects as many as 62 subjects (52.1%). The biochemical pregnancy rate (36.31%) and clinical pregnancy (29.4%) in patients with endometriosis was slightly higher than in non-endometriosis. But statistically it did not affect success rate of achieving biochemical (p = 0.428; RR 0.89; 95% CI: 0.71-1.24) and clinical pregnancy (p = 0.535; RR 0.883; 95% CI: 0.63- 1.22). The rate of miscarriage in postoperative endometriosis patients was higher than non-endometriosis patients (88.6% vs 80.7%) but was not statistically significant (p = 0.294; RR 1.69; 95% CI: 0.61-4.67) . Biochemical and clinical pregnancies were significantly affected by age, infertility, endometrial thickness, embryo age and embryo quality. The incidence of miscarriage was affected by the ovarian stimulation protocol.Conclusion: Endometriosis post operative statistically has no effect on pregnancy outcomes in the IVF / ICSI cycle with frozen embryo transfer compared with another cause of infertility .Keywords:Endometriosis, In Vitro Fertilization, Clinical pregnancy, biochemical pregnancy, miscarriage
Perbandingan Angka Ketahanan Hidup Penderita Kanker Ovarium yang Mendapat Terapi Regimen Kemoterapi Paclitaxel-Carboplatin dan Vyclophosphamide-Adriamycin-Cisplatin di RSUP Dr. Sardjito: Studi retrospektif Januari 2014-Desember 2018
Authors: Novitasari Choery , Attamimi Ahsanuddin , Pradjatmo Heru
Published: May 2021

Latar Belakang: Kanker merupakan penyebab kematian kedua terbanyak setelah penyakit kardiovaskular dan lebih dari 70% kematian yang disebabkan oleh kanker terjadi di negara berkembang. Kanker ovarium merupakan kanker terbanyak kesembilan pada wanita dan menjadi kanker dengan mortalitas ke-5 terbanyak, yaitu 8,6 per 100.000.Tujuan: Menilai angka ketahanan hidup penderita kanker ovarium yang diberikan kemoterapi dengan regimen Paclitaxel- Carboplatin dibandingkan dengan regimen Cyclophospamide-Adriamicyn-Cisplatin di RSUP Sardjito.Metode: Penelitian ini merupakan penelitian observasional dengan rancangan studi analisis angka ketahanan hidup (survival rate) dari penderita kanker ovarium. Data akan diambil secara retrospektif dari rekam medis pasien kanker ovarium yang berobat ke RSUP dr. Sardjito kemudian ditelusuri riwayat kematiannya.Hasil dan Pembahasan: Terdapat 353 penderita kanker ovarium yang dilakukan kemoterapi, terdiri dari 265 subjek yang diterapi PC dan 88 subjek yang diterapi dengan CAP. Dari analisis bivariat didapatkan bahwa regimen kemoterapi PC dan CAP tidak memengaruhi angka ketahanan hidup (HR=1,15, p=0,64, CI95%=0,64-2,05).Usia <50 tahun (HR=0,42, p=0,01, CI95%=0,23-0,77), stadium klinis awal (HR=0,27,   p=0,00,   CI95%=0,14-0,49), dan CA125 pasca kemoterapi <70 U/mL (HR=0,21,        p=0,00,      CI95%=0,11-0,41) merupakan faktor protektif terhadap angka ketahanan hidup penderita kanker ovarium. Analisis multivariat dengan angka ketahanan hidup (cox’s regression) menunjukkan bahwa faktor yang dapat meningkatkan angka ketahanan hidup adalah stadium klinis awal (HR=0,45,   p=0,04,   CI95%=0,18-0,91)  dan CA125 pasca kemoterapi (HR=0,33, p=0,01, CI95%=0,15-0,74).Kesimpulan: Tidak ada perbedaan bermakna antara regimen kemoterapi PC dan CAP dengan angka ketahanan hidup penderita kanker ovarium yang dirawat di RSUP dr. Sardjito selama tahun 2014-2018. Faktor- faktor yang dapat meningkatkan angka ketahanan hidup pasien kanker ovarium adalah stadium klinis awal dan CA125 pasca kemoterapi <70 U/mL. Kata Kunci: Angka ketahanan hidup; kanker ovarium; regimen paclitaxel dan carboplatin; regimen cyclophosphamide, adriamycin, cisplatin
Nilai Gizi dan Daya Terima Cookies Ikan Gabus sebagai Makanan Tambahan untuk Ibu Hamil di Kabupaten Sleman, DIY
Authors: Ganap Eugenius Phyowai , Amalia Riantina Rizky , Sugmana Pakartian Ayu , Hidayati Laksmi Ika
Published: May 2021

Background: Pregnant women needs more nutri onal intake during pregnancy. Lack of nutri onal intake during pregnancy may leads to malnutri on problems. Therefore, it is necessary to provide supplemetary food (PMT) for pregnant women to meet the nutri onal needs during pregnancy. Objec ve: To nd the best formula on of snakehead sh cookies that are well accepted by pregnant women and to test their nutri onal content and microbiological contamina on. Method: This study is an analy cal survey study begins with the formula on of snakehead sh cookies. The formula on of snakehead sh cookies is made by subs tu ng wheat our with snakehead sh our by 50% and 60%. The acceptance test was carried out on pregnant women in the Sleman District, DIY. Cookies with the best acceptability are then laboratory tested to see their nutri onal content and microbiological contamina on. Results adn Discussion: The average value of all the organolep c parameters of the cookies ranged from 3.41 to 3.91 on a scale of 5. There was no signi cant di erence onorganolep c parameters between the formula 50% and 60% (p<0.05). The snakehead sh cookies have the following nutri onal content per 100 g of cookies: 565.9 kcal energy, 14.09 g protein, 24.33 g fat, 72.62 g carbohydrates, and 2.68% water content. The nutri onal content and microbiological contamina on of snakehead sh cookies have met the quality requirements of supplementary food for pregnant by the Ministry of Health of the Republic of Indonesia. Conclusion: Snakehead sh cookies are quite well accepted by pregnant women. Snakehead sh cookies can be used as an alterna ve supplementary foor for pregnant women. Keywords: Snakehead sh cookies; complementary food for pregnant women; food acceptability
The Migratory Journey of Unaccompanied Children
Authors: Diaz Joseph O. Prewitt
Published: May 2021

This article provides a brief discussion on the psychosocial needs of unaccompanied minors crossing the southern border of the United States. It highlights various aspects of migration, and the resulting emotional and psychological impact on unaccompanied minors; it subsequently proposes a resilience approach, in terms of protective behaviors towards increased adjustment and success in a new environment.
Supplier and Customer Relationships in Toyota Manufacturing USA: Proposal of Development of Advanced TPS for Global Production Strategy
Authors: Hirohisa Hirohisa , Fikes James
Published: May 2021

Toyota Motor Corporation has developed a process to enhance the supplier and customer relationships through their Tier 1 shipping process. The Tier 1 shipping entity is the supplier to the customer producing the completed product. In their system, quality gates are inserted into the process to act as the gates from order through shipment to ensure the correct material is ordered and shipped on the proper dates to sustain Just-in-Time delivery. This paper describes the Toyota Manufacturing USA process to fulfill customer orders and build a successful business relationship.
Partial Purification of Peroxiredoxin-2 From Porcine Skeletal Muscle
Authors: Johnson Logan G , Steadham Edward M. , Huff-Lonergan Elisabeth J. , Lonergan Steven M.
Published: May 2021

Fresh meat quality is adversely affected by protein oxidation. However, a fundamental understanding of the diverse factors that influence protein oxidation in postmortem muscle remains elusive. Peroxiredoxin-2 (Prdx2), an antioxidant protein, is more abundant in tough meat based on instrumental tenderness; however, the role of Prdx2 in postmortem skeletal muscle is unknown. Therefore, the objective was to develop a method to purify Prdx2 from the diaphragm, psoas major, and longissimus lumborum. Proteins soluble at low ionic strength were extracted, dialyzed, clarified, and loaded onto a Q-Sepharose anion exchange column equilibrated with TEM (pH 7.4). In all preparations, Prdx2 eluted between about 75 and 115 mM NaCl. Immunoreactive fractions were dialyzed against TEM (pH 8.0), clarified, and loaded onto a DEAE-650S anion exchange column. In all preparations, Prdx2 eluted between approximately 55 and 75 mM NaCl. Immunoreactive fractions were concentrated and loaded onto a Superose-12 size exclusion column. Prdx2 was detected between 14 and 16 mL, and these fractions were concentrated and reduced with 0.5% 2-mercaptoethanol. A final pass over the Superose-12 column was conducted, and Prdx2 was detected in 2 peaks from 11–12 mL and 15–16 mL. Fractions 15–16 were pooled and retained for further experiments. The elution profile of Prdx2 in all 3 muscles was similar. The iden- tification of the primary protein was confirmed with liquid chromatography with tandem mass spectrometry. The purity of Prdx2 off the final Superose-12 column was approximately 33%, 52%, and 47% pure in the diaphragm, psoas major, and longissimus lumborum, respectively. This is the first report of a method to partially purify Prdx2 from skeletal muscle.
Paleomagnetism of the Talpa de Allende and Mascota grabens, western Mexico: A preliminary report
Authors: Maillol J. M. , Bandy W. L.
Published: May 2021

Varios autores han propuesto que el Bloque de Jalisco del oeste de México ha sido sometido a deformaciones internas asociadas con un movimiento hacia el noroeste con respecto a la placa Norteamericana. Estas deformaciones habrían resultado en la formación de varias fosas tectónicas dentro de la parte norte del Bloque. Dos de estas fosas son la de Mascota y la de Talpa Allende. Los análisis datos paleomagnéticos de seis distintos flujos de lava recientes encontraos en las fosas de Mascota y Talpa no indican movimientos estadísticamente significativos en la zona. Mas precisamente, la dirección esperada (campo dipolar axial, D=0°, I=37°) se encuentra dentro del cono de confianza de 95% de la dirección paleomagnética promedia (D=352.2°, I=24.0°,Î±95=16.8°). Sin embargo, la proximidad del polo de referencia Norteamericano y del limite de confianza a 95% del polo paleomagnético indica que datos adicionales podrían permitir la definición de un movimiento significativo hacia el Norte, de la parte de Bloque de Jalisco, o la definición de un basculamiento local de la zona.
Magnitude determination of Mexican earthquakes
Authors: Singh S. K. , Pacheco J. F.
Published: May 2021

Se estudian dos escalas de magnitud alternativas, MA y ME, para estimar, en quasi-tiempo real, la magnitud de sismos moderados y grandes ocurridos en el territorio mexicano y registrados por la estación de banda ancha en la Ciudad Universitaria (CU), México, D.F., MA está basada en la amplitud de las trazas de velocidad ï¬ltradas con un paso de banda de 15 a 30 seg y ME en la estimación de la energía sísmica radiada. Ambas escalas son calibradas con la magnitud de momento sísmico, MW. MA es más adecuada para medir la magnitud de eventos superï¬ciales moderados; sin embargo, sufre de saturación para grandes eventos. ME no presenta problemas de saturación y puede utilizarse para medir la magnitud de eventos profundos. Debido a que MA mide características del evento a período largo, mientras que las contribuciones a ME provienen esencialmente de frecuencias cercanas a la frecuencia de esquina, la magnitud medida con ambas escalas podría diferir, aún cuando la magnitud MA no esté saturada. La disparidad en ambas magnitudes puede indicar la naturaleza anómala de un evento por lo que recomendamos el uso de ambas escalas, cuando sea posible.
Obtención de correcciones de estación para redes sismológicas locales; correcciones para la red RESCO de Colima
Authors: Nava F. A. , García Arthur R. E.
Published: May 2021

La correcta localización de los hipocentros sísmicos es esencial para los estudios de microsismicidad que se llevan a cabo con base en datos de redes sismológicas locales. La distribución espacio-temporal de las fuentes sísmicas reï¬‚eja la distribución y la evolución de esfuerzos en volcanes y fallas activas, y aporta información importante para la evaluación de riesgos. Las redes sismológicas que localizan con programas que suponen modelos de velocidades homogéneos lateralmente, particularmente aquellas situadas en regiones de topografía accidentada, requieren de correcciones de estación para la obtención de localizaciones precisas. Se presenta un método para la obtención de correcciones de estación para redes locales, basado en una determinación preliminar a partir de tiempos de arribo de señales telesísmicas, modificada mediante prueba y error y ajuste promedio en localizaciones de sismos locales. El método se aplica a la obtención de correcciones para las estaciones de la Red Sismológica de Colima que monitorean la actividad sísmica asociada con el Volcán de Fuego. Estas correcciones tienen valores de -0.200 s a +0.360 s y, aplicadas a la localización de 30 sismos volcánicos someros, reducen los errores totales promedio hipocentrales de 0.092 km a 0.063 km. los de tiempo origen de 0.038 s a 0.026 s, y aumentan considerablemente la estabilidad y robustez de las localizaciones.
Evaluación preliminar del campo geomagnético de referencia internacional IGRF-1990 para México y anomalías magnéticas corticales
Authors: Hérnandez Quintero E. , Nolasco Chávez H. , Campos Enríquez J. O. , Cañon Amaro C. , Orozco Torres A. , Urrutia Fucugauchi J. , Alvarez García G.
Published: May 2021

Se reporta una comparación regional entre el International Geomagnetic Reference Field (IGRF) para 1990 y medidas geomagnéticas de campo obtenidas en 51 localidades del país. El modelo de IGRF provee un campo de referencia regional satisfactorio para México. Las diferencias medias entre el modelo del IGRF y las observaciones de campo parecen definir anomalías regionales. Las diferencias medias del campo total son de 10.6 nT, con una raíz media cuadrática (RMS) de 206 nT. Las diferencias medias correspondientes a la componente horizontal y a la declinación son de 24.4 nT y -0.6‘ con desviaciones RMS de 116 nT y 18.7‘ respectivamente. Algunos rasgos de longitud de onda grande en las diferencias de campo total se correlacionan con anomalías aeromagnéticas y observaciones magnéticas de satélite, lo cual sugiere una posible asociación con fuentes en la corteza.
The inï¬‚uence of the southern oscillation on the winter climate of Nuevo Leon state, Mexico
Authors: Cavazos Tereza
Published: May 2021

El propósito de este trabajo es estudiar la inï¬‚uencia de la Oscilación del Sur sobre el clima invernal (noviembre/abril) del Estado de Nuevo León, México. El estudio se fundamenta a través de un análisis de correlación de temperatura media, precipitación, datos de radio-sondeo y un índice de la Oscilación del Sur, deï¬nido como bajo cuando la presión a nivel del mar es anormalmente baja/alta en Tahiti/Darwin. Los resultados muestran un aumento significativo de precipitación y una tendencia hacia temperaturas menores en casi todo el estado, especialmente a barlovento de la Sierra Madre Oriental durante el invierno de los eventos de El Niño o fase baja de la Oscilación del Sur. Asimismo, se obtuvieron anomalías negativas de alturas geopotenciales a 850 mb en el Golfo de México durante la misma fase. Estos resultados se asocian con una inï¬‚uencia conjugada de los Nortes sobre la región costera del golfo norte y de los fuertes vientos del oeste que acompañan a la corriente de chorro subtropical durante tales eventos. Los resultados del estudio indican que la Oscilación del Sur tiene un impacto sobre el clima invernal de Nuevo León con inï¬‚uencias modulantes de carácter regional como son los Nortes y la Sierra Madre Oriental.
Local winds south of Sierra de Misantla (Mexico), and their statistical relationships with 500 mb circulation
Authors: Tejada Martínez A. , Ojeda M. M. , Contreras Hernández A. D.
Published: May 2021

Se aplican modelos de regresión lineal bivariada para estudiar la relación entre vientos locales y características de la circulación a 500 mb. Los resultados indican que ni la dirección ni la rapidez del viento a 500 mb inï¬‚uyen signiï¬cativamente en la circulación superï¬cial. En cambio, factores como el periodo del día, la nubosidad, la estabilidad atmosférica y el gradiente térmico superï¬cial en la horizontal, inï¬‚uyen notoriamente en la rapidez y dirección de los vientos en la región estudiada.
A comparative analysis of the quality factor Q for the regions of Guerrero and Oaxaca, México
Authors: Castro Raúl R. , Munguía Luis , Rebollar Cecilio J. , Acosta José G.
Published: May 2021

Estimaciones del factor de calidad Qs de las ondas S reportadas para las regiones de Oaxaca y Guerrero, México, muestran que la atenuación en Oaxaca es entre 3.7 y 5.0 veces mayor comparada con la de Guerrero en la banda de frecuencias de 1 a 30 Hz. Esta importante diferencia en la atenuación de estas regiones vecinas no puede ser completamente explicada por las caracteÂ­rísticas petrológicas de estas regiones. Cuando los valores de Qs observados en Oaxaca y Guerrero se comparan con otros parámetros, tales como la edad de las roÂ­cas y el flujo de calor, resulta que la atenuación en Oaxaca es mayor de lo esperado en relación con Guerrero. Esto sugiere que el mecanismo más viable para explicar las diferencias de Qs observadas puede relacionarse con el estado de esfuerzos prevalentes cuando los valores de Qs fueron medidos. Los altos valores de Qs estimados para Guerrero pueden ser el resultado del esfuerzo tectónico acumulado en esta región y a que la corteza está posiblemente menos fracturada que en Oaxaca. PALABRAS CLAVE: Guerrero, Oaxaca, atenuación, Q.
Propagación de variaciones de baja frecuencia en la temperatura superficial del Pacífico nor-oriental
Authors: Herrera Cervantes Hugo , Parés Sierra Alejandro
Published: May 2021

Se estudia la propagación de señales de baja frecuencia en ocho años de datos (1982-1989) de Temperatura Superficial del Mar (TSM) en el noreste del Océano Pacífico. El análisis de las observaciones muestra que la variabilidad interanual de la TSM está asociada con la presencia de El Niño. Este se manifiesta como un frente paralelo a la costa así como una intrusión de agua más caliente que el promedio proveniente del océano interior. La primera eigenfunción (61%) está asociada con la presencia de El Niño en la costa en su fase madura y con su decaimiento en forma de señal que se propaga hacia el oeste en bajas latitudes. La segunda eigenfunción (29%) está asociada con la intrusión proveniente del océano interior, posiblemente inducida por advección de gran escala provocada por una intensificación de los vientos en el Pacífico central. Esta señal está desfasada en el tiempo aproximadamente año y medio con respecto al frente costero. La rapidez de propagación hacia el oeste de la señal detectada inicialmente en la costa, se estimó de 3.4 a 1.7 km/día en latitudes menores de 25°N. La posición de la fase teórica de una onda de Rossby se ajusta a los desplazamientos de la señal costera observada, identificando el posible mecanismo de esta propagación en la TSM. PALABRAS CLAVE: Variabilidad de baja frecuencia, ondas de Rossby, temperatura superficial.
Geoquímica isotopic de 13C, D y 18Âº de fluidos del sistema geotérmico Los Humeros, Puebla (México)
Authors: Portugal E. , P. Verma M. , M. Barragán R. , Mañon A.
Published: May 2021

Se presentan resultados isotópicos de Î´13CCH4Â­, Î´DCH4 y Î´13CCO2 del fluido geotérmico de Los Humeros, Puebla, y valores de Î´18O y Î´D correspondientes al agua de manantial aledaños y pozos productores del sistema. No existe incorporación de vapor marginal a la fracción másica que alimenta los pozos, sino un ligero déficit que demuestra un posible equilibrio químico gaseoso en el yacimiento. Los datos isotópicos (Î´D y Î´18O) indican la existencia de una recarga regional por agua meteórica, mientras que el comportamiento de las especies isotópicas Î´D, Î´18O, Î´13CCO2, refleja un proceso de mezcla de fluidos con diferentes características. Se presenta una discusión acerca del posible origen del CO2 y CH4 con base en los datos isotópicos de Î´13CCO2, Î´13CCH4 y Î´DCH4.
Corrimientos dentro del subsuelo lacustre de la cuenca de México
Authors: Durazno Jaime
Published: May 2021

Dentro de los sedimentos lacustres someros de la cuenca de México pueden ocurrir corrimientos horizontales detectables. Los indicios son las obstrucciones generalizadas a la misma profundidad (principalmente entre 5 y 10 m) en conjuntos de piezómetros de tubo flexible, documentadas en 18 sitios. Las obstrucciones se detectaron con un cable. El trabajo de campo se realizó días después del sismo del 19 de septiembre de 1985 (Ms = 8.1). La obstrucción generalizada no se explica por la subsidencia del terreno y podría relacionarse con el comportamiento sísmico general de la cuenca.
Stratigraphy and geochronology of Miocene and Pliocene volcanic rocks in the Sierra San Fermín and southern Sierra San Felipe, Baja California, Mexico.
Authors: Lewis Claudia J.
Published: May 2021

La geología y geocronología (40Ar/39Ar) de la Sierra de San Fermín y parte meridional de la Sierra de San Felipe (Baja California) señalan volcanismo miocénico y pliocénico desde 21 Ma hasta por lo menos 3 Ma, dentro de un arco volcánico que se extendió a lo largo de la península debido a la subducción. El estudio abarca dos áreas eruptivas posteriores a la subducción (11 Ma y ~6 Ma), que fueron desgarradas por fallamiento normal y lateral izquierdo dentro de la Provincia del Golfo de California. Hacia 11 Ma, se depositó un derrame piroclástico regional de 40 m de espesor con andesitas locales y unidades epiclásticas. Hacia 6 Ma las erupciones cubrieron la región hasta espesores de 220 m de piroclásticos, cenizas, epiclásticos y derrames riolíticos locales. Las tobas aumentan en espesor hacia el sur y atraviesan una importante estructura de rumbo ENE que podría ser parte de una caldera en la Sierra de San Fermín, amontonándose contra esta barrera estructural; hacia el norte, escasean las tobas más jóvenes. Las discordancias angulares entre 11 Ma y 6 Ma indican la formación de grandes cuencas extensionales. Hubo un hiatus deposicional entre 11 Ma y ~6 Ma en gran parte del área de estudio; no obstante, hay afloramientos locales de 8 Ma. Probablemente se trate de un efecto de la topografía controlada por la caldera o por fallas normales y no de un periodo de baja actividad volcánica. De 6 Ma a 3 Ma se depositaron otros 600 m de riolitas y andesitas piroxénicas en las cuencas controladas por fallas.
Coronae on Venus: formation by lithospheric drag from convective cells in the mantle.
Authors: Durand-Manterola Hector J.
Published: May 2021

Propongo un nuevo modelo de formación de coronas en Venus. Se supone una celda convectiva cilíndrica centrada en un punto caliente. La litosfera es arrastrada radialmente en la parte superior de la celda por el movimiento horizontal del manto produciendo el anillo de colinas y la cavidad interior. Conforme el material se enfría, desciende plegando la litosfera en el borde de la corona y creando un foso circular. Este mecanismo no puede ocurrir en la Tierra a causa del movimiento de las placas litosféricas, ni en la Luna, Mercurio o Marte por el grosor de sus litosferas.
The PB-Zn ore deposits of San Felipe, Sonora, Mexico: "Detached" mineralization in the Basin And Range Province
Authors: Calmus Thierry , Pérez-Segura Efrén , Roldán-Quintana Jaime
Published: May 2021

La minas de plomo-zinc-plata de San Felipe (Sonora, México) se encuentran en las cercanías de una estructura que presenta las características de un complejo metamórfico ("metamorphic core complex") por lo menos en su parte noreste. Esta estructura está caracterizada por una denudación asociada a la extensión terciaria, la cual afectó el norte de México y el oeste de los Estados Unidos durante el Mioceno. Las unidades del bloque superior, entre las cuales se encuentra el pórfido eocénico superior que contiene en parte los yacimientos de San Felipe, se deslizaron varios kilómetros desde su posición original a lo largo de una falla de despegue: la falla El Amo]. Esta falla corta la zona mineralizada dejando las partes más profundas (skarns) en el bloque inferior, en la parte más alta de la Sierra. Este ejemplo muestra que la distensión debe ser tomada en cuenta en el marco de una exploración minera moderna o en el caso de nuevas búsquedas de reservas en yacimientos conocidos. Se conocen por lo menos dos otros yacimientos en Sonora afectados por procesos similares, un depósito de tungsteno en el flanco oeste de la Sierra de Mazatán, y una parte de la zona oxidada de La Caridad (falla La Caridad). En Arizona, el depósito de San Manuel-Kalamazoo es un ejemplo clásico de un pórfido cuprífero afectado por la extensión terciaria.
Seismic hazard assessments for El Salvador
Authors: J. Bommer J. , A. Hernández D. , A. Navarrete J. , M. Salazar W.
Published: May 2021

Se describe la evolución de las normas sísmicas en El Salvador, incluyendo un enfoque probabilística en la norma vigente. Se compara esta última norma con tres trabajos anteriores y se atribuyen las discrepancias a diferencias en cada paso de la estimación y no únicamente en las relaciones de atenuación. Se discuten las atenuaciones espectrales para América Central.
Angola-Brazil Geotraverse: Ocean-bottom seismoacoustic observations
Authors: A. Boldyrev S.
Published: May 2021

Se describen las observaciones sísmicas sobre el perfil Angola-Brasil durante 1980-1986 empleando estaciones submarinas (OBS). Se describe la sismicidad en la Dorsal del Atlántico Sur, el registro de fases T de un sismo localizado en las South Shetlands, y los residuos de dos telesismos para la Cuenca de Angola.
Seismic structure between the Pacific coast and Mexico City form the Petatlán earthquake (Ms=7.6) aftershocks
Authors: Valdés-González Carlos , Meyer Robert P.
Published: May 2021

Los tiempos de arribo de ondas P y S de las réplicas del sismo del 14 de marzo de 1979 Petatlán (Ms=7.6), han sido usados para delinear una estructura de velocidades compresionales y de corte para la zona de subducción entre Petatlán y la ciudad de México y a lo largo de la costa del estado de Guerrero. El modelo final consiste en una zona de transición bidimensional, compuesta por un bloque continental, uno acrecional y uno de corteza oceánica. El bloque continental consiste en tres capas corticales planas con el Moho localizado a 45 km de profundidad. El bloque oceánico fue modelado con dos capas con un espesor total de 8 km y con un echado de 10° al N34°E, que se entiende tierra adentro. Las ondas sísmicas de las réplicas con hipocentros debajo de la corteza oceánica viajan principalmente en el manto oceánico superior y alcanzan sitios entre los 50 y 300 km tierra adentro. La localización hipocentral de 792 réplicas fue comparada con la estructura obtenida con el trazado de rayos. Tres por ciento de estas réplicas se localizan dentro de la región sugerida como el bloque continental, 85% están dentro de la corteza oceánica y 12.5% debajo de la corteza oceánica. 55% de los eventos se localizan bajo el arreglo sísmico local y sus hipocentros están determinados con errores menores de 5 km. Los hipocentros de las réplicas definen una zona angosta de Wadati-Benioff con 8-10 km de espesor, la cual concuerda con el modelo de la litosfera oceánica basada en los tiempos de viaje de las réplicas registradas por el perfil sísmico a lo largo de la costa y en dirección a la ciudad de México. 50% de las réplicas (aproximadamente 350) se encuentran dentro de la corteza oceánica en una capa delgada de menos de 8 km de espesor y con un área de 480 km2 localizada a mayor profundidad y alejada de la trinchera. Esta es una región localizada principalmente bajo las estaciones sísmicas y ha sido propuesta como una zona de fuerte acoplamiento en una litosfera joven y de rápida convergencia (Astiz, 1987; McNally et al. 1986), y como una asperidad basada en la localización de los premonitores del sismo de Petatlán (Hsu et al. 1984) y también en sus réplicas (Valdés et al. , 1982; Hsu et al. , 1984)
Sharia Fintech as a Sharia Compliance Solution in the Optimization of Electronic-Based Mosque’s Ziswaf Management
Authors: Pati Umi , Pujiyono Pujiyono , Pranoto Pranoto
Published: May 2021

Research data from the Center for Strategic Studies of Baznas on Zakat Mapping Potential Indicators (IPPZ), which analyzes the calculation of zakat potential based on sectoral and regional zakat objects, shows that Indonesia has the potential for zakat of IDR 233.8 trillion in 2019. However, only 3.5 percent of them can be managed. Therefore, Baznas has collaborated with fintech but it is not yet based on sharia. This study uses the Islamic Economic Research Method (Muamalah) with a descriptive normative approach. The results showed that the digitalization of ZISWAF through fintech was effective and the results exceeded the target. On the other hand, according to some scholars, several forms of fintech operations contain non-Islamic elements. Therefore, the Baznas agreement must explicitly state that fintech should separate ZISWAF funds from other fintech user funds so that they are not considered as float funds to be placed in BI; and do not utilize ZISWAF funds. Neither Baznas, muzakki, nor mustahik can benefit from depositing funds. Sharia fintech is a practical solution for UPZ Masjid to increase zakat inclusion. Unfortunately, Indonesia has no regulations related to sharia fintech.