bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of an Artificial Intelligence–Based Automated Recommendation System for Clinical Laboratory Tests: Retrospective Analysis of the National Health Insurance Database (Preprint)
Authors: Islam Md Mohaimenul , Yang Hsuan-Chia , Poly Tahmina Nasrin , Li Yu-Chuan Jack
Published: November 2020

BACKGROUND

Laboratory tests are considered an essential part of patient safety as patients’ screening, diagnosis, and follow-up are solely based on laboratory tests. Diagnosis of patients could be wrong, missed, or delayed if laboratory tests are performed erroneously. However, recognizing the value of correct laboratory test ordering remains underestimated by policymakers and clinicians. Nowadays, artificial intelligence methods such as machine learning and deep learning (DL) have been extensively used as powerful tools for pattern recognition in large data sets. Therefore, developing an automated laboratory test recommendation tool using available data from electronic health records (EHRs) could support current clinical practice.

OBJECTIVE

The objective of this study was to develop an artificial intelligence–based automated model that can provide laboratory tests recommendation based on simple variables available in EHRs.

METHODS

A retrospective analysis of the National Health Insurance database between January 1, 2013, and December 31, 2013, was performed. We reviewed the record of all patients who visited the cardiology department at least once and were prescribed laboratory tests. The data set was split into training and testing sets (80:20) to develop the DL model. In the internal validation, 25% of data were randomly selected from the training set to evaluate the performance of this model.

RESULTS

We used the area under the receiver operating characteristic curve, precision, recall, and hamming loss as comparative measures. A total of 129,938 prescriptions were used in our model. The DL-based automated recommendation system for laboratory tests achieved a significantly higher area under the receiver operating characteristic curve (AUROCmacro and AUROCmicro of 0.76 and 0.87, respectively). Using a low cutoff, the model identified appropriate laboratory tests with 99% sensitivity.

CONCLUSIONS

The developed artificial intelligence model based on DL exhibited good discriminative capability for predicting laboratory tests using routinely collected EHR data. Utilization of DL approaches can facilitate optimal laboratory test selection for patients, which may in turn improve patient safety. However, future study is recommended to assess the cost-effectiveness for implementing this model in real-world clinical settings.
Neural dynamics for facilitating ADHD diagnosis in preschoolers: central and parietal delta synchronization in the Kiddie Continuous Performance Test (Preprint)
Authors: Chen I-Chun , Chang Chih-Hao , Chang Yang , Lin Dar-Shong , Lin Cheng-Hsiu , Ko Li-Wei
Published: November 2020

BACKGROUND

The present study aimed to characterize children at risk of attention-deﬁcit/hyperactivity disorder (ADHD) at preschool age and provide early intervention. The continuous performance test (CPT) and quantitative electroencephalography (QEEG) can supplement valuable information to facilitate diagnosis.

OBJECTIVE

This study measured brain dynamics at varying task rates in the CPT using a wireless wearable EEG and identified correlations between the QEEG and CPT data in preschool children with ADHD.

METHODS

Forty-nine preschool children participated in this study, of which 29 were diagnosed with ADHD and 20 exhibited typical development (TD). Conners Kiddie Continuous Performance Test (K-CPT) and wireless wearable EEG recordings were employed.

RESULTS

Significant differences were observed between the groups with ADHD and TD in task-related QEEG spectral powers (central delta, as well as posterior delta and beta , P < .01), which were distinct only in the slow-rate condition. A from resting to the CPT task condition induced a central posterior alpha power decrease in the ADHD group. In both resting and task conditions, the delta and theta power were positively correlated with the CPT perseveration scores, whereas the alpha and beta powers were negatively correlated with specific CPT scores mainly on perseveration and omission (P < . 01).

CONCLUSIONS

These results, which complement the findings of several other studies that have investigated within-task-related brain dynamics in preschoolers, can help specialists working on early intervention to plan training and educational programs for preschoolers with ADHD.
Understanding the Lived Experience of North American Dental Patients With a Single-Tooth Implant in the Upper Front Region of the Mouth: Protocol for a Qualitative Study (Preprint)
Authors: Afrashtehfar Kelvin Ian , Bryant Stephen Ross
Published: November 2020

BACKGROUND

Assessment of the subjective experiences of individuals with maxillary anterior (ie, the upper front region of the mouth) single-tooth implants is limited mainly to quantitative measurements of satisfaction with appearance. Interestingly, there is unexplained variability in the relationship between satisfaction and appearance.

OBJECTIVE

This qualitative study protocol aims to explore and better understand the satisfaction with appearance and function in a Canadian population with maxillary anterior single-tooth implants treated at a postgraduate university clinic. Thus, we aim to obtain diversity among participants relating to the identification of esthetically pleasing and displeasing cases from a clinician perspective.

METHODS

A qualitative research design using interpretative phenomenology analysis (IPA) will provide an adaptable inductive research approach. The participants will be recruited, and consent documents, photographs, digital intraoral scans, and self-administered questionnaire responses will be obtained from them. The transcribed verbatim data from audio-recorded, in-depth, semistructured, one-to-one interviews of the participants will be managed, coded, and analyzed thematically with computer-assisted qualitative data analysis software. The IPA will consider the COnsolidated criteria for REporting Qualitative (COREQ) guidelines when applicable.

RESULTS

For the qualitative interview, we plan to include at least eight patients to conduct up to 1.5 hours of open-ended interviews with each participant aided by an interview guide. Ethical approval was granted by the University of British Columbia Behavioral Research Ethics Board (H19-00107) in May 2019. Two American dental foundations funded this study.

CONCLUSIONS

The analysis in this study will elucidate the aspects (including their value) that influence participant satisfaction at different dental implant treatment stages. This will be the first qualitative study on this group of the population to explore and obtain a better understanding of their satisfaction with appearance and function, as well as any other patient-reported outcome measures that could be identified.

INTERNATIONAL REGISTERED REPORT

DERR1-10.2196/25767
THE IMPACT OF PERSONAL PRODUCTIVITY DUE TO THE ATTACKS OF CORONAVIRUS DISEASE 2019: USING PARTIAL LEAST STRUCTURAL EQUATION MODEL
Authors: AHMED SHEKH ABDULLAH-AL-MUSA , BIN KHIDZIR NIK ZULKARNAEN , AFROZ SHIRIN
Published: November 2020

Global coronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The disease was first identified in December 2019 in Wuhan, the capital of China’s Hubei Province, and has since spread globally, resulting in the ongoing 2019–2020 coronavirus pandemic that has an impact which would be disturbed the personal productivity in the community. The dependent variable which is threat of COVID-19 (Thr_Cov-19), vulnerability of COVID-19 (Vul_Cov-19), and the unexpected change in society factors and one independent variable that is personal disturbance factors is used in this paper. Moreover, using as an indicator which will determine disturbance of personal productivity (D_PP) in the society. Since multiple regression by partial least square-structural equation modeling is used to examined of data by following unstructured method. Moreover, the resulting point out three dependent variables significantly influences on the independent variable of personal productivity in the society. As a matter of fact, this study concludes the foremost influence factor on D_PP in society due to COVID-19 risk factors such as Thr_Cov-19, Vul_Cov-19, and unexpected changed in the society factors. This study contributes to introductory study but vibrant understanding in stimulating the prediction of personal productivity in the society due to the COVID-19 attacks.
THE ROLE OF CANNABIDIOL IN THE INFLAMMATORY PROCESS AND ITS PROPERTIES AS AN ALTERNATIVE THERAPY – A REVIEW (META-ANALYSIS)
Authors: M FERRO , P ESCALANTE , A GRAUBARD
Published: November 2020

Abstract

Cannabis has been used as a medicinal plant for thousands of years in Asia. Numerous physical, psychological, and emotional benefits have been attributed to cannabis since its first reported use in 2,600 BC in a Chinese pharmacopoeia. Recent years have seen a resurgence in interest in the therapeutic potential of compounds derived from these plants, mainly the non-psychoactive compound cannabidiol (CBD). In this way, we seek to evaluate, through this present study, what has been published about CBD in the Pubmed / Medline database in the last two years (2019/2020) in relation to anxiety, depression, panic attack and dementia, as well as therapeutic dosages, results with significant values, side effects and others reported in the studies found.  The results were distributed in 4 tables. In the first, the types of publication were reported; in the second, the proposal for evaluation; in the third, the results with significance evaluated; and in the fourth the doses used. Although the majority of studies found are in the form of a review (55.3%), several studies in humans have shown promising results with the use of CBD in therapies. The treatments for anxiety and stress with CBD were the most evident accounting for 37.8% of the total studies found in table 2. The relationship of CBD in metabolic processes as inflammatory markers, activator of specific nuclear receptors and protein modulations was the second most evident item na tabela 2 with 11,1%. Cognitive processes and depression appear comes in sequence with 8.9% both. The results of significance values found in this study demonstrated a good acceptance in the treatment with CBD regarding anxiety and stress. With 70.6% of positive results in table 3, CBD appears as a promising option in the treatment of anxiety, stress and similar behaviors. Regarding depression, the results were slightly lower. With 66.6% positive results, depression can also be treated with CBD as an alternative therapy option. In dose used CBD administration are extremely diverse. The doses ranged from 25mg to 800mg depending on the time of administration and also the purpose of the therapy. Although the results presented in this study are promising, we need more information to be able to position ourselves on the efficiency of CBD in proposed treatments.
DETAILED INFORMATION ON FAVIPIRAVIR: DRUG FOR TREATMENT OF SARS-COV-2
Authors: SANJANA REDDY MONAJI
Published: November 2020

Severe acute respiratory syndrome corona virus-2 (SARS-CoV-2) is another name given to pandemic disease COVID-19 that is caused by a newly discovered coronavirus. People infected with coronavirus will experience mild-to-moderate respiratory illness, and it can be seen in a serious stage when comorbidities include along with it. This is now creating a huge pandemic situation all over the world with a huge rate of sufferers, that is, around 9.06 million around the world and about 440 k in India till today according to the World Health Organization. This is a serious condition that should be solved with vaccine only as coronavirus is undergoing mutation it makes difficult to invent a vaccine for it. So far, about 200 genetic mutations have been discovered across the world also in these 198 mutations appeared independently more than once. Due to this pandemic situation, there are so many clinical trials going on in discovering vaccines. Recently, after many trails conducting favipiravir are found to be the most successful in treating any stage of SARS-CoV-2. This article focuses completely on this area, along with its mechanism, side effects, uses, and contraindications.
LIQUID BIOPSY: THERANOSTICS AND PERSONALIZED ONCOLOGY
Authors: MALI AKASH , GOSAVI SHRAVNI , SHUKLA GOVIND
Published: November 2020

Cancer is linked with mutated genes, and the study of tumor-associated genetic alterations is gradually used for diagnostic and treatment purposes. The solid tumors are now obtained from biopsy and/or surgical or biopsy specimens. Tumor cells release circulating free DNA into the blood, but the majority of circulating DNA are often not of cancerous origin, and the detection of cancer-associated alleles in the blood has long been unbearable to achieve. Modern science has overwhelmed these restrictions, making it possible to identify both genetic and epigenetic aberrations. A liquid biopsy (LB) or blood sample can provide the genetic landscape of all cancerous lesions (primary and metastases) as well as offering the opportunity to systematically track genomic evolution. This communication will explore how LB is associated with personalized oncology to predict response to treatments and the development of acquired resistance.
STUDY LITERATION OF CHEMICAL CONTENTS OF SOME PLANTS THAT POTENTIALLY AS THE SOLAR SOWS
Authors: S Sukmawati , Kaswan Dwi Rizka Sari , Pratama Mamat
Published: November 2020

Excessive sun exposure causes the epidermal tissue of the skin to be unable to fight negative effects such as skin disorders ranging from mild dermatitis to skin cancer, so skin protection is needed such as the use of sunscreen, many plants in Indonesia contain phenolic and flavonoid contents that can potentially act as sunscreens. This study aims to determine the chemical content of several plants that have potential as sunscreen. Where this research was conducted through data collection from several scientific research journals. The data collection is done online using Google, Google Scholar. Based on the data obtained from several scientific research journals, it can be stated that some plants have the potential to act as sunscreens, by looking at the content they have, namely phenolic and flavonoids. The ethanol extract of 96% of Sembung Rambat Plants (Mikania micrantha Kunth) with an SPF value of 42.8810 with a total flavanoid content of 1.175%.
Peer Review History:
Received: 10 September 2020; Revised: 15 October; Accepted: 23 October, Available online: 15 November 2020
UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency.
Received file

Average Peer review marks at initial stage: 5.0/10
Average Peer review marks at publication stage: 7.0/10
Reviewer(s) detail:
Ahmad Najib, Department of Pharmacognosy-Phytochemystry Universitas Muslim Indonesia-Indonesia, ahmad.najib@umi.ac.id
Dr. Gehan Fawzy Abdel Raoof Kandeel, Pharmacognosy Department, National Research Centre, Dokki, 12622,  Giza, Egypt, gehankandeel9@yahoo.com
Dr. Mohamed Said Fathy Al-Refaey, University of Sadat City, Menofia, Egypt, mido_ph212@yahoo.com
Prof. Dr. Ali Gamal Ahmed Al-kaf, Sana'a university, Yemen, alialkaf21@gmail.com
Comments of reviewer(s):

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The research on the perception of the quality of services is of crucial
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Incremental risk of developing severe COVID-19 among Mexican patients with diabetes attributed to social and healthcare access disadvantages
Authors: Sosa-Rubí Sandra G. , Seiglie Jacqueline , Chivardi Carlos , Manne-Goehler Jennifer , Meigs James B. , Wexler Deborah J. , Wirtz Veronika J. , Gómez-Dantés Octavio , Serván-Mori Edson
Published: November 2020

OBJECTIVE

Diabetes mellitus is an important risk factor for severe
COVID-19, but little is known about the marginal effect of additional risk
factors for severe COVID-19 among individuals with diabetes. We tested the
hypothesis that sociodemographic, access to healthcare, and presentation to
care characteristics among individuals with diabetes in Mexico confer an
additional risk of hospitalization with COVID-19.

RESEARCH DESIGN
AND METHODS

We conducted a cross-sectional
study using public data from the General Directorate of Epidemiology of
the Mexican Ministry of Health. We
included individuals with laboratory-confirmed SARS-CoV-2 between March 1st and July 31st, 2020. The primary outcome was the predicted probability of hospitalization,
inclusive of 8.5% of patients who required intensive care unit (ICU) admission.

RESULTS

Among 373,963 adults
with COVID-19, 16.1% [95% CI:
16.0-16.3] self-reported diabetes. The predicted probability of
hospitalization was 38.4% [37.6-39.2] for
patients with diabetes only and 42.9% [42.2-43.7] for patients with diabetes
and one or more comorbidities (obesity, hypertension, cardiovascular disease,
and chronic kidney disease). High municipality-level of social deprivation
and low state-level healthcare resources were associated with a 9.5% [6.3-12.7]
and 17.5% [14.5-20.4] increased probability of hospitalization among patients
with diabetes, respectively. In age-, sex-, and comorbidity-adjusted models, living
in a context of high social vulnerability and low healthcare resources was associated with the highest predicted
probability of hospitalization.

CONCLUSIONS

Social vulnerability
contributes considerably to the probability of hospitalization among
individuals with COVID-19 and diabetes with associated comorbidities. These
findings can inform mitigation strategies for populations at the highest risk
of severe COVID-19.
Peptidylarginine deiminase inhibition prevents diabetes development in NOD mice
Authors: Admin Ada , Sodré Fernanda M. C. , Bissenova Samal , Bruggeman Ylke , Tilvawala Ronak , Cook Dana P. , Berthault Claire , Mondal Santanu , Callebaut Aïsha , You Sylvaine , Scharfmann Raphael , Mallone Roberto , Thompson Paul R. , Mathieu Chantal , Buitinga Mijke , Overbergh Lut
Published: November 2020

Protein citrullination plays a
role in several autoimmune diseases. Its involvement in murine and human type 1
diabetes has recently been recognized through the discovery of antibodies and T-cell
reactivity against citrullinated peptides. In the current study, we demonstrate
that systemic inhibition of peptidylarginine deiminases (PADs), the enzymes
mediating citrullination, through BB-Cl-amidine treatment, prevents diabetes
development in NOD mice. This prevention was associated with reduced levels of
citrullination in the pancreas, decreased circulating autoantibody titers
against citrullinated GRP78 and reduced spontaneous NETosis of bone
marrow-derived neutrophils. Moreover, BB-Cl-amidine treatment induced a shift
from Th1 to Th2 cytokines in the serum and an increase in the frequency of
regulatory T cells in the blood and spleen. In the pancreas, BB-Cl-amidine
treatment preserved insulin production and was associated with a less
destructive immune infiltrate, characterized by reduced frequencies of effector
memory CD4+ T cells and a modest reduction in the frequency of IFNγ-producing
CD4+ and CD8+ T cells. Our results point to a role of
citrullination in the pathogenesis of autoimmune diabetes, with PAD inhibition
leading to disease prevention through modulation of immune pathways. These
findings provide insight in the potential of PAD inhibition for treating
autoimmune diseases like type 1 diabetes.
MOTIVASI ATLET CLUB RENANG DI KABUPATEN BADUNG DALAM MENJAGA KEBUGARAN JASMANI PADA MASA PANDEMI COVID-19
Authors: Yasa Putu Putra , Artanayasa, Dr. I Wayan
Published: November 2020

Penelitian ini bertujuan untuk mengetahui motivasi atlet club renang di kabupaten Badung dalam menjaga kebugaran jasmani pada masa pandemi covid-19.  Jenis penelitian ini merupakan penelitian deskriptif kuantitatif dengan jenis survei. Populasi pada penelitian ini adalah Bali Pari Swimming Club, Bali Pari Fins Swimming Club, Taman Tirta Swimming Club dengan jumlah 128 orang, dan sampel pada penelitian ini adalah 25% dari populasi yaitu berjumlah 32 orang. Pengambilan sampel menggunakan non random sampling yaitu quota sampling. Analisis data menggunakan statistik deskriptif kuantitatif dengan katagori interval. Hasil dari penelitian motivasi atlet club renang di kabupaten Badung dalam menjaga kebugaran jasmani pada masa pandemi covid-19 pada faktor intrinsik yaitu 83 dan pada faktor ekstrinsik mendapat skor 81. Dari kedua faktor tersebut motivasi atlet club renang di Kabupaten Badung dalam menjaga kebugaran jasmani pada masa pandemi covid-19 mendapat skor 82 dalam sekala penelitian katagori sangat tinggi. Saran dari peneliti untuk atlet agar menjadi lebih termotivasi dalam menjaga kebugaran jasmani meskipun ditengah pandemi harus berusaha mencari untuk meningkatkan kebugaran jasmani pada masa pandemi covid-19.
Covid 19: última evidencia
Authors: Herrera Diego , Gaus David
Published: November 2020

Esta actualización forma parte de la serie de actualizaciones clínicas, publicadas en los dos números anteriores de la Revista Practica Familiar Rural, el objetivo, es poner a la disposición de profesionales en salud la evidencia actualizada alrededor de la epidemiologia, la transmisión comunitaria, el riesgo de infección de personal de salud la fisiopatología y las manifestaciones clínicas extra-pulmonares, tomado en cuenta que en la primera etapa de la pandemia se puso mucho enfoque sobre el aparato respiratorio.Finalmente trascribimos las guías sobre el apoyo ventilatorio en pacientes que pueden requerir Cuidados Intensivos y las nuevas recomendaciones sobre el tratamiento farmacológico.
Hypertension and its role in COVID-19-related cerebrovascular disease
Authors: Tsenkina Yanina
Published: November 2020

Cerebrovascular disorders such as stroke and intracerebral hemorrhage (ICH) occur in COVID-19 patients with pre-existing hypertension. Elevated blood pressure increases the risk of COVID-19-related morbidity and mortality. Although, the exact mechanisms of action are not well understood, pre-existing imbalance in the renin-angiotensin-aldosterone system (RAAS), and hypertension-induced cerebrovascular abnormalities can facilitate severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infiltration into the central nervous system (CNS) leading to severe tissue damage and cerebrovascular insults. Alternatively, SARS-CoV-2 can independently affect blood flow regulation and induce cerebrovascular disease (CeVD) via binding to its receptor angiotensin converting enzyme 2 (ACE2) and modulation of RAAS. The present review systemically discusses published clinical reports and provides an overview of the potential associations between pre-existing hypertension, SARS-CoV-2 infection, and the occurrence of COVID-19-related CeVD. Early identification of high-risk patients is crucial for better point of care and prevention of COVID-19-related CeVD, morbidity and mortality.
Spare parts supply network optimization with uncertain distributed lead times and demands
Authors: Wang Y. , Shi Q. , Li L. , Li F. , Xia W.
Published: November 2020

In the spare parts supply network, there are many uncertain factories, such as unpredictable demands and changeable lead times. The spare parts shortage caused by those uncertainties may lead to severe losses. To solve the uncertainty of supply network, a determined optimization model is developed and then reformulated as a robust counterpart. In the robust model, it is only necessary to know the moment information of the uncertain parameters rather than the true probability distribution. The solution obtained by the robust model can satisfy the constraints in the worst-case, that is, feasible for any probability distribution within the moment based ambiguity set. Two moment based robust models are studied in this work. The result of the experiment indicates that the robustness of the robust model is stronger than that of the determined model and chance constraint model, and the effect of safety tolerance on the robustness is revealed by sensitivity analysis. Finally, the second order moment model is verified to be superior to the first order moment model in spare parts supply network optimization.
THE MEANING OF TRADITION â€œNJALANGâ€ FOR THE PEOPLE OF MERP AS VILLAGE, MERPAS KAUR REGENCY REGENCY, BENGKULU
Authors: Pradana Yoka
Published: November 2020

One of the traditions of grave pilgrimage that is still carried out by the community is the tradition of grave pilgrimage in Merpas Village Kaur Regency, Bengkulu known as Njalang. This tradition is unique be- cause the grave pilgrimage is carried out jointly by villagers every 2nd day of Syawal. This research is aimed at analyzing the meaning of Njalang for the Merpas villagers from the perspective of symbolic interaction. The research method was descriptive qualitative. In-depth interviews and observations of participants were used as the techniques of data collec- tion. The results of this research indicate that the implementation of Njalang tradition is a marriage between cultural activities and religious rituals that have meaning for the people of Merpas village. Njalang is defined as shared reality, as a tradition that creates joint actions and spiri- tual meanings within pilgrims. This article found something new that visiting the tombs of families and religious figures there are several simi- larities as well as differences in meaning. The meaning is emphasized on the implementation of the tradition together.
Fund Managers Adding Values? Measuring Performance without Benchmark – A Study of Indian Mutual Fund Schemes
Authors: Sayyad Munawar
Published: November 2020

This paper calculates the Portfolio Change Measure (PCM) developed by Grinblatt and Titman for a sample of 744 equity schemes of Indian mutual funds over a minimum period of more than 2 years and less than 11 years. PCM, based on holding of assets, is a measure which is free from ‘benchmark’ biases arising out of usage of a ‘benchmark’ portfolio. So by using PCM as a measure, this paper, without using any benchmark, attempts to assess whether the selected mutual fund managers were able to add value and exhibit superior skills on the average and thus making a case for active fund management over a passive buy and hold strategy. Using the monthly holding statement of each individual scheme’s portfolio, rolling PCM has been calculated on a monthly basis with a rolling window of one year. The results of our analysis, supported by robustness checks, which includes time periods of pre-and post-Global Financial Crisis, shows strong evidence of active fund management adding value in the stock selection and hence in return generating process, thus justifying the possession of superior skill or superior information of fund managers at an aggregate level. Finally, using Quantile Regression we identify some characteristics of the scheme like scheme size and ownership category, which influence PCM significantly.
Experimental detection of mechanical efficiency of marine diesel engines
Authors: Shuraev Oleg Petrovich
Published: November 2020

The article summarizes the results of heat engineering tests of diesels used in the educational process of Volga State University of Water Transport and its branches. Although the test goals were different in each case, the indicator diagrams of the working process in each cylinder were recorded in the course of the tests. Analysis of indicator diagrams helped to determine the indicator power of the engine in each case. By comparing the indicator parameters with the corresponding effective ones there was performed the estimation of the mechanical efficiency of each engine at different speeds of rotation of the crankshaft. The studies were carried out on engines of brands 6NVD48AU, 6L275RrII/PN, 8NVD36U, 6L160PNS. It was found that in almost all cases, mechanical losses included fan losses in load devices and friction losses in their bearings. The concept of a screw characteristic is considered. A graph of the propeller characteristics in relative units for various types of engines is built. It is noted that it is very difficult to set a specific value of the crankshaft speed required for testing, the actual points will be close to the theoretical ones, shifting along the helical characteristic. An algorithm for testing and processing the results is presented. There have been analyzed the dependences covered in literature (analytical and statistical) for determining the mechanical efficiency.
PERAN KEMAMPUAN KOMUNIKASI TERHADAP SIKAP PERCAYA DIRI SISWA SEKOLAH DASAR
Authors: Luckyta Lulu , Sutisnawati Astri , Uswatun Din Azwar
Published: November 2020

This research aims to describe the role of communication skills on the confident attitude of students in Negeri 1 Selabintana Elementary School. The method used in this study is qualitative-descriptive referring to the Miles design pattern Huberman. The results of research analysis are obtained through field observation data retrieval techniques, and structured interviews, interviews are conducted with both informant namely high class teachers in state Elementary School 1 Selabintana. The results show that the students ' communication skills in the learning process are said to be good, whether referred to here is the students are able to convey the meaning of the message that they want to convey to the communicable by behave as it should be: directed, structured, clear in speaking or articulating articulation, regulating the use of language, language tone, appreciative of disagreements This communication skill has an impact on increasing student confidence in the final outcome of learning with maximum.
ALAT PERAGA ENGKLEK SEBAGAI UPAYA PENINGKATAN KEMAMPUAN MENGGALI PENGETAHUAN BARU SISWA
Authors: Agustina Ella , Purbasari Imaniar , Ristiyani Ristiyani
Published: November 2020

This study aims to describe the increase in the ability to explore new knowledge of students and teaching skills of teachers by using the engklek as media in grade IV SD IT Al-Hikmah Mayong.The class action research is carried out for two cycles, each cycle having two meetings and consisting of four stages, namely planning, acting, observing, and reflecting. Class IV research subjects at Al-Hikmah Mayong Elementary School with a total of 36 students. The independent variable in this study is the engklek as media, while the dependent variable is the ability to explore new knowledge. Data collection techniques using tests (written) and nontest include observation, interviews, and documentation. The analysis used is quantitative data analysis and qualitative data analysis.The results of the study showed that using a engklek as media could improve students ability to explore new knowledge and teaching skills. The ability to explore new knowledge of students has increased from cycle I 64% and cycle II to 92%. There is an increase in teacher teaching skills in the first cycle to get a success rate of 70% with enough categories, then in the second cycle to get a success rate of 94% with very good categories.
PENINGKATAN HASIL BELAJAR IPS MELALUI MODEL PROJECT BASED LEARNING KELAS IV SDIT AL KAWAAKIB JAKARTA BARAT
Authors: Sudrajat Ajat , Budiarti Ika
Published: November 2020

The pupose of this study was to increase students attention and learning outcomes on social studies learning content through the project based learning approach in class IV at SDIT Al Kawaakib. The research subjects were student of class IV with 11 students consist of male 7 students, female 4 students. This research was conducted on february 1 s.d February 29, 2020. Even semester of the 2019/2020 school year. Based on the results of the study, it shows that student learning outcomes increase with increasing student attention and interes in social studies learning materials through a project-based learning approach. This can be sen from the student learning outcomes in the form of learning completeness which increased up to 73% at the end of cycle 2. The conclusion of this study shows that the Project Based Learning model can increase interest and learning outcomes of fourth grade students of SDIT Al Kawaakib