bluuebunny/crossref_metadata_2025 huggingface dataset:
Retraction: Roy S. Performance of Grouted Coupler Embedded in Reinforced Concrete ABC Bridge Pier at Vehicle Impact. Recent Progress in Materials 2023; 5(1): 001
Authors: rpm rpm
Published: March 2023

RetractionRetraction: Roy S. Performance of Grouted Coupler Embedded in Reinforced Concrete ABC Bridge Pier at Vehicle Impact. Recent Progress in Materials 2023; 5(1): 001Recent Progress in Materials Editorial OfficeLIDSEN Publishing Inc., 2000 Auburn Drive, One Chagrin Highlands, Suite 200, Beachwood, OH, USA; E-Mail: rpm@lidsen.com Recent Progress in Materials2023, volume 5, issue 1doi:10.21926/rpm.2301011Received: February 28, 2023Accepted: February 28, 2023Published: February 28, 2023
Menstrual Tracking Mobile App Review by Consumers and Health Care Providers: Quality Evaluations Study (Preprint)
Authors: Ko Siyeon , Lee Jisan , An Doyeon , Woo Hyekyung
Published: March 2023

BACKGROUND

Women’s menstrual cycle is an important component of their overall health. Physiological cycles and associated symptoms can be monitored continuously and used as indicators in various fields. Menstrual apps are accessible and can be used to promote overall female health. However, no study has evaluated these apps’ functionality from both consumers’ and health care providers’ perspectives. As such, the evidence indicating whether the menstrual apps available on the market provide user satisfaction is insufficient.

OBJECTIVE

This study was performed to investigate the key content and quality of menstrual apps from the perspectives of health care providers and consumers. We also analyzed the correlations between health care provider and consumer evaluation scores. On the basis of this analysis, we offer technical and policy recommendations that could increase the usability and convenience of future app.

METHODS

We searched the Google Play Store and iOS App Store using the keywords “period” and “menstrual cycle” in English and Korean and identified relevant apps. An app that met the following inclusion criteria was selected as a research app: nonduplicate; with >10,000 reviews; last updated ≤180 days ago; relevant to this topic; written in Korean or English; available free of charge; and currently operational. App quality was evaluated by 6 consumers and 4 health care providers using Mobile Application Rating Scale (MARS) and user version of the Mobile Application Rating Scale (uMARS). We then analyzed the correlations among MARS scores, uMARS scores, star ratings, and the number of reviews.

RESULTS

Of the 34 apps, 31 (91%) apps could be used to predict the menstrual cycle, and 2 (6%) apps provided information pertinent to health screening. All apps that scored highly in the MARS evaluation offer a symptom logging function and provide the user with personalized notifications. The “Bom Calendar” app had the highest MARS (4.51) and uMARS (4.23) scores. The MARS (2.22) and uMARS (4.15) scores for the “Menstrual calendar—ovulation & pregnancy calendar” app were different. In addition, there was no relationship between MARS and uMARS scores (r=0.32; P=.06).

CONCLUSIONS

We compared consumer and health care provider ratings for menstrual apps. Continuous monitoring of app quality from consumer and health care provider perspectives is necessary to guide their development and update content.
User’s perceived service quality of national telemedicine services during COVID-19 pandemic in Bangladesh: Cross-sectional study (Preprint)
Authors: Khatun Fatema , Das Novel Chandra , Hoque Md. Rakibul , Saqeeb Kazi Nazmus , Rahman Monjur , Park Kyung Ryul , Rasheed Sabrina , Reidpath Daniel D.
Published: March 2023

BACKGROUND

The COVID-19 pandemic was a burden for our health system, and created opportunities for using teleconsultation as an alternative way of accessing expert medical advice. In Bangladesh, the use of tele consultation increased about 20-fold during the pandemic.

OBJECTIVE

This study aimed to assess the influence of service quality and user satisfaction on the intention to continue to use teleconsultation services among users of national teleconsultation services during the pandemic in Bangladesh.

METHODS

A cross-sectional survey was conducted in 2020 among users of national teleconsultation service - Shastho Batayon who availed the service for acute respiratory infection. A validated mHealth Service Quality model based on structural equation modelling (SEM) and Confirmatory Factor Analysis was used to analyse the data with SmartPLS 3.0.

RESULTS

Among the 2097 study participants, the majority were male (78%), aged 18-39 years (68%), residents of urban areas (76%), had more than 10 years of schooling (64%), and were from middle income households (79%). From consumer perspective the quality of service platform (β=.946), service interaction (β=.974) and outcome (β=.955) contributed to service quality. Service quality was positively associated with user satisfaction (β=0.327, P<.001) and intention to use teleconsultation services (β= 0.102, P<.001). User satisfaction was positively associated with intention to use teleconsultation services (β= 0.311, P<.001).

CONCLUSIONS

Our study findings showed that maintenance of the service quality is crucial for the user satisfaction and continuance of use of teleconsultation services; and that user satisfaction increased the continuance of use of teleconsultation services. Our findings are relevant for low income context where teleconsultation services are trying to address the gap in service delivery.

CLINICALTRIAL
Pengenalan Tanda Arah untuk Navigasi Automatic Guided Vehicle berbasis Raspberry Pi
Authors: Florentinus Budi Setiawan  , Rachmat Hidayat  , Leonardus Heru Pratomo  , Slamet Riyadi
Published: March 2023

Perkembangan zaman modern di sektor teknologi robotika dan mekanisasi telah meningkat sangat signifikan dalam beberapa dekade ini karena efisiensinya yang tinggi dari aspek waktu dan tenaga. Pada sistem mobilisasi barang untuk pemanfaatan perusahaan, khususnya bagian industri dan bagian pergudangan, salah satu robot yang digunakan adalah kendaraan berpemandu otomatis pengangkut barang atau yang biasa disebut sebagai automatic guided vehicle (AGV). Salah satu metode navigasi lama di AGV adalah penggunaan sebuah sensor untuk mengikuti pola garis pada objek yang terdeteksi, yaitu garis pada lantai. Metode tersebut kurang efektif karena lambat laun objek pola garis di lantai tersebut akan menghilang akibat efek dari gaya gesek roda AGV, sehingga tidak lagi dapat terdeteksi oleh sensor kamera. Oleh sebab itu, diperlukan sebuah peningkatan metode navigasi AGV agar dapat menjadi sebuah inovasi yang berkelanjutan. Metode navigasi ini menggunakan empat objek gambar yang diposisikan pada area yang dilintasi robot AGV dan kamera sebagai sensor yang menghadap ke depan, sehingga AGV dapat dengan presisi mendeteksi pola objek gambar menggunakan bantuan computer vision menggunakan library perangkat lunak OpenCV. Selanjutnya, pola objek gambar yang sudah terdeteksi diproses oleh sebuah program yang dirancang pada perangkat komputer mini Raspberry Pi 4 Model B. Hasil pengujian membuktikan bahwa metode ini mampu mendeteksi objek gambar yang berada di area yang terjangkau kamera dan berhasil menampilkan keluaran dari objek gambar tersebut. Sistem berhasil mengenali objek secara cukup akurat, dengan parameter jarak 10–95 cm dan melalui beberapa percobaan. Analisis kecepatan putaran roda depan dan belakang AGV dilakukan  menggunakan osiloskop dan takometer sebagai alat pengukur kecepatan atau rotasi roda.
Paradigm Shift of Regional Economic Cooperation Mechanism in East Asia: The Case of RCEP and CJKFTA
Authors: Haozheng JIANG
Published: March 2023

The economies in East Asia, since the late twentieth century, have been important driving forces of regional and global economic growth. Among them, the development of regional FTAs and the continuous promotion of regional integration processes have played a key role. Both RCEP and CJKFTA, as two representative cases of regional FTA vision, are considered regional economic cooperation mechanisms with great potential. However, due to various factors, especially the intervention of the United States based on its interests in the Asia-Pacific region, the development process and final results of both are very different. An in-depth analysis of the two different regional FTAs can help further understand East Asia’s changing overall economic and political situation and the paradigm shift in FTA strategies in the process. What is beyond doubt is that future economic cooperation in East Asia will be confronted by the U.S. Indo-Pacific strategy’s policy of containment of China’s regional influence. The competition between the two for regional leadership will significantly influence the future economic integration process in the region and the Asia-Pacific region. In the context of the global economic crisis caused by the pandemic, higher-level regional cooperation will effectively stimulate the potential development capacity of the East Asian region. It will lead to the recovery of the global economy through trade and other forms. On the contrary, if there is a double standard in East Asia, which is the core of the global value chain, due to political reasons, it will seriously slow down the overall global economic recovery process.
НАУЧНЫЙ ПРОРЫВ. ЯНВАРСКИЕ ТЕЗИСЫ
Authors: Яминский И.В. , Ахметова А.И.
Published: March 2023

Центр перспективных технологий уже более 30 лет занимается зондовой микроско-
пией, которая позволяет увидеть клетки, бактерии, вирусы и даже атомы и молекулы. На физическом факультете МГУ при поддержке правительства Москвы создан Центр молодежного инновационного творчества "Нанотехнологии", где школьники и студенты учатся работе на 3D-наномикроскопе, на станках с числовым программным управлением (ЧПУ), 3D-принтерах и лазерном гравере. В ЦМИТ мы рассказываем о нанотехнологиях и зачем нужно строить заводы. Эта деятельность будет продолжена и в кластере "Ломоносов".
МИЭМ НИУ ВШЭ ДЛЯ ОТРАСЛИ ТЕЛЕКОММУНИКАЦИЙ
Authors: Портной С.Л. , Назаров И.В. , Никитин С.Е.
Published: March 2023

Представлен вновь разработанный в МИЭМ НИУ ВШЭ учебный трек "Информационно-телекоммуникационные технологии", обучение по которому позволит готовить в этом вузе кадры для разработки и производства сложного телекоммуникационного оборудования, а также работы в крупнейших операторских компаниях по эксплуатации и проектированию сложных сетей мобильной и фиксированной связи.
Object Detection and Monitor System for Building Security Based on Internet of Things (IoT) Using Illumination Invariant Face Recognition
Authors: Chatisa Ivan , Syahbana Yoanda Alim , Wibowo Agus Urip Ari
Published: March 2023

Theft and intrusion are crimes that often occur in neighborhoods when there is opportunity or negligence by owners and security personnel. Many studies have been carried out to improve environmental security by applying cameras as a surveillance medium. However, the camera is not optimal in detecting objects when the lighting conditions are lacking. Therefore, in this study, a monitoring and object detection system was built by applying the Illumination Invariant model. This model is used to improve the appearance of the image from light and shadow reflections. The process of detecting and identifying objects is done by using human facial features (face detection) captured by the camera. The camera used is a Logitec C270 Webcam 720p which is connected via a USB port on the Raspberry Pi 4. The Raspberry Pi 4 processes human face image data and sends the processing results to a MySQL database using the HTTP protocol. Data transmission is done using the Python Flask web framework. The system was successfully run 100% by using black box testing of all functional requirements. Tests on the object detection feature were carried out based on different lighting conditions 15 times by comparing the original image and the results of the Illumination Invariant implementation. Based on the test results obtained object detection accuracy of 86.7%.
The Legislature and Political Development: A Comparison between Korea and Mongolia
Authors: Ж.ТӨРТОГТОХ
Published: March 2023

In a democratic system, parliament is, on one hand, a representative institution of the people and, on the other hand, exists with a status of a political institution as a policy-making and law-making body. It is guaranteed by the Constitution. In addition legislature serves for political systems actively and becomes its dynamic expression. Parliamentary institution plays a tremendous role in and influences heavily on the political development. In this work, first, the author will consider general overview of constitutional systems of two countries. Then the author will discuss about the role and the status of parliament in the political system from their historical and functional sides, providing it with some patterns of the legislative institution. Moreover, electoral system and last election results, political parties’ seat ratio in parliament and the level of the voter turnout or citizen participation in the elections will be introduced here as well. Finally, it will cover the issues of the legislature’s effects in the political development and the process of strengthening of democracy and, furthermore, what potentials it will contain in further democratic process.
БАЯЛГИЙН ҮНДЭСНИЙ ҮЗЭЛ БА МОНГОЛ ДАХЬ ШИНЭ КОЛОНИЧЛОЛЫН ШИНЖҮҮД
Authors: Ц.Батболд
Published: March 2023

Колоничлол ба шинэ колоничлолын мөн чанар, түүнийг дэмжсэн хамаарлын онол, өнөөгийн Африк дахь баялгийн үндэсний үзэл, шинэ колоничлолын эсрэг Африкийн улсуудын төрийн бодлогын талаар авч үзсэн. Мөн үүнийг Монголын жишээн дээр буулгаж үзсэнээр шинэ колоничлолын шинж тэмдгүүд хэрхэн илэрч байгааг тодруулах зорилго тавьсан.
УЛС ТӨРИЙН НАМЫН ГИШҮҮД, ДЭМЖИГЧДИЙН ОРОН ЗАЙН ТАРХАЛТЫГ СОНГУУЛИЙН ГАЗАРЗҮЙН ҮҮДНЭЭС ТОДОРХОЙЛОХ СУДАЛГАА
Authors: Д.Оюунчимэг  , Г.Цогтдэлгэр
Published: March 2023

Electoral geographic study is evaluates the election result and spatial dependence. Therefore, the election result is described all over the country and region by the cartography approach. The aim of this research is to determine the micro environmental situations and impact factors using the hot-spot analysis. In addition, the size of research area as an electoral district and gathered information from 480 respondents. The respondents were choses by cluster collection approach using questionnaire method and considered the level of collection as 99% probability and respondents as ±6 interval. This research is significant to determine the political attitude of the citizens, the spatial situations of the political parties, define the spatial dependence and evaluate. The spatial situations by studying the political attitude of the citizens using hot-spot analysis. This research work is the basic study which will be carried out at micro level of electoral geographic study.
ФРАНЦЫН УЛС ТӨРИЙН ШИНЖЛЭХ УХААНЫ ХӨГЖЛИЙН ҮНДСЭН ХАНДЛАГА БА УЛС ТӨРИЙН ЗАСАГЛАЛЫН ҮЗЭЛ БАРИМТЛАЛ
Authors: Г.Цэнд-Аюуш
Published: March 2023

Франц орон Европ тивийн төдийгүй дэлхийн нийтийн баялаг түүх, соёлыг бүтээхэд хувьсгалт уламжлалаараа гайхуулагдсан орны нэг билээ. Энэ улс өнгөрсөн ба өнөө үед ч улс төрийн дипломат протокол, ёс журам үүсэн бүрэлдэхэд ихээхэн нөлөөтэй орны нэг бөгөөд франц хэл он удтал дипломат бичиг солилцооны болон харилцааны хэл байсан түүхтэй. Энэ бүхэн 53 нь орчин үеийн улс төрийн ажил хэргийн хэлхээ холбооны франц маягийн төлөвшилд нөлөөлсөн нь тодорхой.
СОНГУУЛИЙН ТОГТОЛЦОО БА УЛС ТӨРИЙН ТОГТВОРТОЙ БАЙДЛЫН ШҮТЭЛЦЭЭНИЙ АСУУДАЛД
Authors: Б.Энхмандах
Published: March 2023

“Монгол орон ардчиллын замаар эргэлт буцалтгүй замнаж, улс төрийн тэмцлийн туршлага, улс төрийн соёлын хувьд Зүүн Европийн зарим орнуудаас ч илүүтэй болж, сонгогчид маань сонгууль өгч сурчээ” гэж бид бахархан ярих дуртай. Үүнийгээ бид нотолж, ардчилсан парламентын чөлөөт сонгуулиа 4 дэхь удаагаа явуулаад байна. Тэгвэл өнгөрсөн сонгуулиудаар юу болоод өнгөрчих вөө? Улс төрийн тогтолцоонд сонгуулуиуд юу авчирав аа? Өнөөгийн Монголын нийгмийн улс төрийн амьдралд өнгөрсөн сонгууль хэрхэн нөлөөлсөн бэ? Зэрэг олон асуултын хариулт дараагийн сонгууль ойртож байгаа энэ үед улс төр судлаачдад төдийгүй, сонгогч олон түмэнд сонирхолтой байгаа юм. Үүнд он дарааллаар нь хөөж хариулт өгөхийг оролдьё.
ЭМЭГТЭЙ УЛС ТӨРЧИЙН ИМИЖ БҮРДҮҮЛЭЛТ
Authors: Д.Оюунчимэг
Published: March 2023

Улс төрд эмэгтэй хүн орж байгаа нь өвөрмөц үйл явдал бус харин тэдний орох гэж байгаа улс төрийн үйл явц нь эмэгтэй хүний байгалаас заяасан өрөвч нигүүлсэнгүй сэтгэлээс маш өөр ертөнц юм. Улс төр - хүн төрөлхтөний аль ч үед эрчүүдийн хатуу ширүүн тэмцлийн талбар байсаар ирсэн. Улс төрд орохоор шийдсэн эмэгтэй хүн бүр уг хуулийг маш сайн ойлгох ёстой болдог. Өөрийн олон талын мэдлэг, ажил албаны дадлага туршлагадаа найдан улс төрд орж, амжилт олно хэмээн өөрийгөө дахин дахин боловсруулж суугаа эмэгтэйчүүдэд, “.Амжилт, алдар хүндийг залбирч эсвэл хөлсөө асгаруулж олж авдаг биш харин зохион бүтээдэг” /1/ тэр зарчим бодитойгоор тулгарч ирдэг. Гэтэл эмэгтэй улс төрчдийн олонхийн гаргадаг хамгийн том алдаа бол юм мэддэггүй ч юмуу, чадваргүйдээ биш, харин “юу ч хийдэггүйд” л байдаг байна. Эмэгтэйчүүд улс төрч болохын тулд, бусдаас ялгарахын тулд, давуу болохоо харуулахын тулд, улс төрийн намынхаа дотор нэр нөлөөтэй болохын тулд, олон түмэнд танигдахын тулд, сонгогчид саналаа өгдөг болохын тулд чухам юу юу хийж байна вэ? ямар арга технологийг ашиглан үүнийгээ хэрэгжүүлж ямар үр дүнд хүрэв? гэдэг эрэгтэй улс төрчидтэй харьцуулахад эрс өөр байсаар байна
ОЛОН УЛСЫН УЛС ТӨРИЙН ШИНЖЛЭХ УХААНЫ ХОЛБООНЫ ДЭЛХИЙН XX ИХ ХУРАЛ
Authors: Ц.Ганболд
Published: March 2023

Миний бие 2005 онд олон улсын улс төрийн шинжлэх ухааны холбоонд гишүүнээр элсэн орсон бөгөөд 2006 онд олон улсын улс төрийн шинжлэх ухааны холбоо надад Японы Фукуока хотод болох тус холбооны дэлхийн ХХ Их хурлын урилгыг явуулсан юм. Ингээд 2006 оны 07-р сард Монголоос анх удаа олон улсын улс төрийн шинжлэх ухааны холбооны дэлхийн их хуралд оролцсон бөгөөд энэхүү өгүүлэлдээ олон улсын улс төрийн шинжлэх ухааны холбооны тухай болон дэлхийн ХХ конгрессийн талаар та бүхэнд мэдээлэх зорилго тавьлаа.
Pengaturan Posisi Sudut Motor DC menggunakan Proporsional Integral (PI) Control untuk Kicker Robot Sepak Bola Beroda
Authors: Hais Yosi Riduas , Saputra Oki , Zahidarrifqi Mhd.
Published: March 2023

Penendang (kicker) merupakan suatu komponen pada robot sepak bola beroda yang berfungsi untuk menendang bola. Kicker dapat dibangun dengan berbagai cara, salah satunya dengan memanfaatkan motor DC. Untuk menghasilkan tendangan yang kuat dan stabil diperlukan  prime mover berupa dua motor DC yang di-couple. Penerapan strategi ini menimbulkan masalah berupa sulitnya sikronisasi kedua motor DC tersebut. Penelitian ini difokuskan pada penerapan PI control untuk pengaturan posisi sudut kicker pada dua motor DC PG45. Didapatkan hasil bahwa kicker mampu mencapai posisi 45o, 56o, 75o dan 91o dengan error steady state yang dihasilkan sebesar 1o pada posisi 55o dan 90o serta kelajuan tendangan rata – rata masing – masing parameter sebesar 21,323 m/s, 43,422 m/s, 5,169 m/s dan 4,032 m/s.
Prototype Sistem Pendeteksi Objek Mobil pada Lampu Lalu Lintas Menggunakan Metode Blob Detection
Authors: Aulia Ursi , Fuady Samratul , Hais Yosi Riduas
Published: March 2023

Perkembangan sistem ketenagalistrikan semakin pesat sejalan dengan pengembangan  energi baru terbarukan. Intermittent menjadi masalah utama pembangkit listrik terbarukan, sehingga penggunaan baterai menjadi solusi. Namun hal ini justru menghasilkan limbah bahan beracun dan berbahaya sehingga tujuan untuk menciptakan energi bersih tidak dapat tercapai. Pengembangan  photovoltaic (PV) dengan sistem grid tied  dapat menjadi solusi dari masalah tersebut. Manfaat dari penggunanaan PV dengan sistem grid tied adalah konsumen dapat menyuplai daya di kondisi daya   berlebih dan digantikan pada malam hari sehingga ada pemotongan dari pembayaran listrik setiap bulannya. Dengan begitu, teknologi penyimpanan tidak lagi digunakan pada sistem ini dan terjadi dampak posisitif dari sisi ekonomi pada konsumen. Penelitian ini menganalisis aliran daya sebelum dan sesudah penggunaan PV pada beban home area network dan menghitung dampak ekonomi pada konsumen setelah menyuplai listrik pada grid utiliti.
Compound motor action potentials in transient and persistent phrenic nerve injury - metanalysis.
Authors: Kuniewicz Marcin , Kowalski Marcin
Published: March 2023

Background: The right phrenic nerve is vulnerable to injury (rPNI)
during cryoballoon ablation (CBA) isolation of the right pulmonary
veins. The complication can be transient or persistent. The reported
incidence of rPNI fluctuates from 4.73% to 24.7% depending on changes
over time, CBA-generation, and selected protective methods. Methods:
Through September 2019, a database search was performed on MEDLINE,
EMBASE, and Cochrane Database. In the selected articles, the references
were also extensively searched. The study provides a comprehensive
meta-analysis of the overall prevalence of rPNI, assesses the transient
to persistent PNI-ratio, the outcome of using compound motor action
potentials (CMAP), and estimated average time to nerve recovery.
Results: From 2008 to 2019, 10,341 records from 48 trials were included.
Out of 783 eighty- PNI (7.7%), 589 (5.7%) were transient, and 194
(1.9%) were persistent. CMAP caused a significant reduction in the risk
of persistent PNI from 2.3% to 1.1% (p = 0.05; odds ratio [OR]
2.13) in all CBA groups. The mean time to rPNI recovery extended beyond
the hospital discharge was significantly shorter in CMAP group at three
months on average versus non CMAP at six months (p = 0.012). CMAP (in
contrast to non-CMAP procedures) detects PNI earlier from 4 to 16 sec (p
< 0.05; I2 = 74.53%) and 3 to 9º (p < 0.05; I2 =
97.24%) earlier. Conclusions: rPNI extending beyond hospitalization is
a relatively rare complication. CMAP use causes a significant decrease
in the risk of prolonged injury and shortens the time to recovery
First Report on In-silico de novo Design and Interaction studies on Novel COVID-19 Proteins
Authors: Sapre Nitin , Sule Laxmi
Published: March 2023

The paper presents the incorporation of in silico missenses and
studies the effect of missenses to understand its effect on the
Ligand-Protein interactions, of COVID-19 protein. In silico
protein-ligand interaction, studies are being used to understand and
investigate the drug-likeness of various molecules. 19 novel COVID-19
proteins are designed by inducing in silico missenses by mutating
N691 amino acid residue in 7bv2 protein, the only residue forming H-bond
with the ligand molecule in the parent protein. The work illustrates the
effects of in silico-induced mutation on various interactions
such as H-Bond, VDW, π-alkyl interactions, and changes in the number and
type of surrounding amino acid residues. The results have suggested a
common pattern of behavior on mutation with T, V, W, and Y. Further, it
is observed that the number and type of amino acid residues increase on
mutation, suggesting future possibilities to understand the effect of
natural mutation on the binding of a ligand molecule with the protein.
Successful penile re-implantation after 8 hours post penile self-mutilation
Authors: Salem Mohammed , Alherek Abdul , Muangalayi Francis , Tshiala Alain , Mukendi Alain Mwamba
Published: March 2023

Penile self-mutilation is an infrequent form of self-harming behavior
seen primarily in patients with schizophrenia spectrum disorders and
rarely reported in those with major depressive disorders. We herewith
present a major depression related case of penile self-mutilation
successfully managed by macroscopic penile re-implantation performed 8
hours after the incident.
Futuristic deep learning algorithm for long term solar power prediction
Authors: Kumar V. Suresh , M Leelavathi
Published: March 2023

Prediction of solar output power is a valuable research work for
analyzing photovoltaic(PV) power. This study develops a futuristic
deep-learning algorithm that predicts solar power output. The solar
output data is collected in real-time for a series-parallel combination
of PV systems with a 1 KW capacity that is available in our laboratory.
The collected data is pre-processed via, initialization, normalization,
and validation for accurate prediction. The normalization process is
used to create the data set needed to fill in the missing values. The
k-nearest neighbor (KNN) algorithm and the interpolation method are used
to fill in the missing value. Then, the data is validated using a newly
proposed deep long short-term memory (DLSTM) algorithm for solar output
power prediction. Also as a new approach, the DLSTM algorithm and a
recurrent neural network (RNN) are combined with the capture of
time-series data in the validation process to improve the prediction
accuracy. To prove its superiority, the proposed DLSTM-RNN model is
compared with other exciting models, like the artificial neural network
(ANN), long-short-term memory (LSTM), and recurrent neural network
(RNN). All the models are trained and tested using three different
activation functions viz Sigmoid, ReLU, and tanh with different epoch
values. Finally, the accuracy is evaluated in terms of different
performance error indexes, such as the basic error index (BEI) and the
promoting percentage error index (PPEI).
Left bundle branch area pacing for heart failure patients requiring cardiac resynchronization therapy: a meta-analysis
Authors: Jin Chengyue , Dai Qiying , Li Pengyang , Lam Patrick , Cha Yong-Mei
Published: March 2023

Background: Left bundle area branch pacing (LBBP) is a novel
conduction system pacing method to achieve effective physiological
pacing and an alternative to cardiac resynchronization therapy (CRT)
with biventricular pacing (BVP) for patients with heart failure and
reduced ejection fraction (HFrEF). Objective: To review current
data comparing BVP and LBBP in patients with HFrEF and indication CRT.
Methods: We searched PubMed/Medline, Web of Science, and
Cochrane Library from the inception of the database to November 2022.
All studies that compared LBBP with BVP in patients with HFrEF and
indications of CRT were included. Two reviewers performed the study
selection, data abstraction, and risk of bias assessment. We calculated
risk ratios with the Mantel-Haenszel method and mean difference with
inverse variance using random effect models. We assessed heterogeneity
using the I index, with I
> 50% indicating significant heterogeneity.
Results: Ten studies (9 observational studies and 1 randomized
controlled trial; 616 patients; 15 centers) published between 2020 and
2022 were included. We observed a shorter fluoroscopy time [mean
difference (MD) 9.68, 95% CI 4.49-14.87, I =95%,
P<0.01, minutes] as well as a shorter procedure time (MD
33.68, 95% CI 17.80-49.55, I =73%,
P<0.01, minutes) during implantation of LBBP CRT compared to
conventional BVP CRT. LBBP was shown to have a greater reduction in QRSd
(MD 25.13, 95%CI 20.06-30.20, I = 51%,
P<0.01, milliseconds) a greater left ventricular ejection
fraction (LVEF) improvement (MD 5.80, 95% CI 4.81-6.78, I
=0%, P<0.01, percentage) and a greater
ventricular end-diastolic diameter (LVEDD) reduction (MD 2.11, 95% CI
0.12-4.10, I =18%, P=0.04, millimeter). There was a
greater improvement in New York Heart Association function (NYHA) class
with LBBP (MD 0.37, 95% CI 0.05-0.68, I =61%,
P=0.02).LBBP was also associated with a lower risk of a composite of
heart failure hospitalizations and all-cause mortality [Risk ratio
(RR) 0.48, 95% CI 0.25-0.90, I =0%, p=0.02]
driven by reduced heart failure hospitalizations (RR 0.39, 95% CI
0.19-0.82, I =0%, p=0.01). However, all-cause
mortality rates were low in both groups (1.52% vs. 1.13%) and similar
(RR 0.98, 95%CI 0.21-4.68, I =0%, p=0.87).
Conclusion: Compared to BVP, LBBP is associated with, a greater
improvement in LV systolic function, and a lower rate of heart
failure-related hospitalization. Dedicated randomized controlled trials
and larger patient populations are needed to further elucidate the
long-term safety and efficacy of LBBP CRT.
Understanding Probe Dependency of an Allosteric Site at the Dopamine D2 Receptor
Authors: Gill Amandeep Kaur , Karlov Dmitry , Tikhonova Irina , McCormick Peter J.
Published: March 2023

Background and Purpose: Allosteric sites on G Protein-Coupled Receptors
have become increasingly popular drug targets as they can lead to the
development of more selective compounds. An example is the D2 receptor,
a validated drug target for numerous anti-psychotic drugs. In this
study, we sought to gain a better understanding of the relationship
between allosteric ligands and different orthosteric compounds. We
investigated the UCB compound, a PAM-antagonist when treated with
Dopamine, to see if it exhibits probe dependence and compared against
other signalling pathways in relation to the allosteric site to gain
insight into the improved design of a more selective D2R allosteric
modulator. Experimental Approach: Dopamine, Quinpirole and Rotigotine
were tested with/without the UCB compound. Forskolin-induced cAMP
accumulation, Gi2 protein activation and β-arrestin2 protein recruitment
real-time signalling pathways were assessed through transient
transfection with the appropriate biosensors in HEK293 cells. Key
Results: The UCB compound behaved as an allosteric antagonist with
Quinpirole/Rotigotine in cAMP accumulation assays. However, in the
β-arrestin2 protein recruitment assays, the UCB compound behaved as a
PAM with all three agonists. Conclusions and Implications: The movement
of the indole moiety of the UCB compound towards TM2 is important as it
caused the switch from PAM-antagonism to antagonism in Forskolin-induced
cAMP accumulation assays and a PAM in the β-arrestin2 protein
recruitment assays. This provides insight to the functional groups
required of a D2R allosteric modulator to interact with TM2. These
findings may contribute towards the design of selective allosteric drugs
targeting the D2R.
COVID-19 Seroprevalence in a Mixed Cohort of SARS-CoV-2 PCR Positive and Exposed Subjects
Authors: Knowles Giles , Winkie Colin , Umer Amna , Weisse Martin , Moffett Kathryn , Gupta Shipra
Published: March 2023

1.1 Background Early in the SARS-CoV-2 pandemic, polymerase
chain reaction (PCR) testing was reserved for symptomatic patients.
However, many infections were asymptomatic or mildly symptomatic.
Positive serologic antibody (Ab) testing is theorized to be a marker of
prior infection, allowing for identification of true burden of disease
and establishing links between outbreaks. 1.2 Objective Assess
serologic testing in subjects after PCR testing and compare
seropositivity rates of household vs. non-household close contacts.
1.3 Methods We identified subjects who were PCR-positive
between March 2020 and May 2021. Index cases and close contacts then
underwent serologic testing for IgG against SARS-CoV-2 nucleocapsid
N-protein. 1.4 Results One-hundred-and-thirteen subjects
underwent serologic testing with a sensitivity of 65.0%, specificity of
78.9%, positive predictive value of 92.9%, and negative predictive
value of 34.9%. Index cases comprised 20.5% of subjects, and 73.9%
were seropositive (p=0.01). Close contacts included 72% household
contacts and 28% non-household contacts. One seropositive case had no
prior PCR and four were PCR negative. No statistical difference existed
in seropositivity between household and non-household contact (53.1%
vs. 43.8%, p=0.4). 1.5 Conclusions Testing for IgG against
SARS-CoV-2 N-protein may identify previously unrecognized infections in
the community. Seropositivity rates of household vs. non-household
contacts were not significantly different, and >50% of
household contacts were seropositive.
AUTOIMMUNE HEMOLYTIC ANEMIA REVEALING A CASE OF SARCOIDOSIS
Authors: Haifa Tounsi , Wafa Skouri , Imen Chaabane , Ikbel Ghachem , Baraa Laabidi , Boutheina Ben Ammou , Garbouj Wafa , Chelbi Emna , Khaled Bouzaidi , Alaya Zeineb , Raja Elamri
Published: March 2023

Hematological involvement in sarcoidosis is widely presented by
lymphopenia and splenomegaly. However, the auto-immune hemolytic anemia
associated to sarcoidosis is exceptionally reported in the literature.
In this report we describe a novel observation of this situation.
Multi-Model Ensembles for Upper Atmosphere Models
Authors: Elvidge Sean , Granados S R , Angling M J , Brown M K , Themens D R , Wood A G
Published: March 2023

Multi-model ensembles (MMEs) are used to improve the forecasts of
thermospheric neutral densities. A variety of algorithms for
constructing the model weights for the MMEs are described and have been
implemented including: performance weighting, independence weighting and
non-negative least squares. Using both empirical and physics-based
models, compared against in-situ CHAMP observations, the skill of each
MME weighting approach has been tested in both solar minimum and maximum
conditions. In both cases the MME performs better than any individual
model. A non-negative least squares weighting for the MME on a set of
bias corrected models provides a 68% and 50% reduction in the mean
square error compared to the best model (Jacchia-Bowman 2008) in the
solar minimum and maximum cases respectively.
(Synthetic) Data-driven identification of governing equations of aseismic/seismic fault slip and frictional heterogeneities
Authors: Biswas Pulak , Ray Sohom
Published: March 2023

Models of fault slip development generally consider interfacial strength
to be frictional and deformation of the bounding medium to be elastic.
The frictional strength is usually considered as sliding rate- and
state-dependent. Their combination, elastic deformation due to
differential slip and rate-state frictional strength, leads to nonlinear
partial differential equations (PDEs) that govern the spatio-temporal
evolution of slip. Here, we investigate how data on fault slip rate and
stress can directly discover the complex system (of PDEs) that
governs aseismic slip development. We first prepare (synthetic) data
sets by numerically solving the forward problem of slip rate and fault
stress evolution with models, such as a thin laterally deformable layer
over a thick substrate. We now identify the variables, for example, slip
rate or friction state variable, and use nonlinearity
identification algorithms to discover the governing PDE of the chosen
variable.

In particular, we use sparse identification of nonlinear dynamics
algorithm (SINDy, Brunton et al., 2016) where we solve a regression
problem, Ax=y. Here, y is the time derivative of the
variable of interest, for example, slip rate. A is a large
matrix (library) with all possible candidate functions that may appear
in the slip rate evolution PDE. The entries in x, to be solved
for, are coefficients corresponding to each library function in matrix
A. We update A according to the solutions x
so that A’s column space can span the dynamics we seek to find.
To find the suitable column space for A, we encourage
sparse solutions for x, suggesting that only a few
columns in matrix A are dominant, leading to a
parsimonious representation of the governing PDE.

We show that the algorithm successfully recovers the terms of the PDE
governing fault slip and could also find the frictional parameter, for
example, a/b, where a and b, respectively, are the magnitudes that
control direct and evolution effects. Moreover, the algorithm can also
determine whether the associated state variable evolves as aging- or
slip-law types or their combination. Further, with the data set prepared
from distinct initial conditions, we show that the SINDy can also
determine the problem parameter’s spatial distribution
(heterogeneities) from fault slip rate and stress data.
ETRSS-1 attitude and orbit control subsystem and on-orbit 1 performance analysis
Authors: Gadisa Dinaol , Fufa Tesfaye G
Published: March 2023

The Ethiopian remote sensing microsatellite, weighing 65 kilograms, was
successfully launched into space in December 2019 from the Taiyuan
launch facility, with the mission of collecting earth imagery data to
assist Ethiopia in combating climate change. The satellite is controlled
from a sun-synchronous orbit at an altitude of 628 kilometers by a
ground control station on Mount Entoto. The purpose of this paper is to
provide an overview of the ETRSS-1 satellite system, including its
development and integration with AOCS subsystems, as well as its
performance in orbit. Furthermore, the hardware used in the development
of the satellite’s AOCS will be discussed, and onboard telemetry data
from the system will be analyzed to determine its current status.
Diagnostics of the ionospheric conductivity based on spacecraft observations of the magnetospheric ULF waves
Authors: Smotrova Ekaterina E. , Mager Pavel N. , Mikhailova Olga S. , Klimushkin Dmitri Yu.
Published: March 2023

In 27 October 2012 the ULF wave in Pc4 range being Alfv’en wave was
observed with Van Allen Probe A. In the event the parallel Poynting flux
of the wave was directed towards the Northern ionosphere. Assuming that
this may be caused by the asymmetry of ionospheric conductivity between
the Northern and Southern hemispheres, its effect on the standing
structure of the Alfv’en wave was investigated in this paper. For this
purpose the analytical model with straight magnetic field lines was
used. As a result the method for estimation of the Northern and Southern
ionospheric conductivity was developed. It allows us to reconstruct the
parallel structure of Alfv’en waves under various conditions of the
ionospheric conductivity. With the method developed, the ionospheric
conductivity for the October 27, 2012 event was evaluated and compared
with ionosphere model IRI-2016.
Experimental study on heat transfer enhancement of heat storage material for energy pile
Authors: Yan Jun-Bo , Gao Song
Published: March 2023

As a kind of clean and renewable energy, shallow geothermal energy has the
characteristics of wide distribution and huge reserves. The use of pile
foundation heat exchange for building heating is a new technology to realize
the effective utilization of geothermal energy. Improving the mechanical
properties of the pile body material and improving the heat exchange
efficiency of the pile foundation concrete will effectively promote the
application of concrete in building structures. In this paper, the effect of
steel fiber content on the thermal conductivity and mechanical strength of
concrete is discussed by carrying out physical and mechanical properties
test of concrete material of pile body. It is proposed to incorporate steel
fibers into the concrete of the pile body to improve its thermal
conductivity, thereby improving its heat transfer efficiency per unit time.
At the same time, the role of steel fiber in enhancing heat transfer
performance in pile material is analyzed from the microscopic mechanism,
which provides theoretical support for the optimization process of concrete
ratio of pile foundation in practical engineering.
A new combined ZK-mZK dynamic model for Rossby solitary wave
Authors: Zhao Bao-Jun , Jiang Zi-Ming , Sun Wen-Jin
Published: March 2023

In this article, using multi-scale and perturbation methods, a partial
differential model of Rossby solitary waves with complete Coriolis force
effect is obtained, which is called the combined ZK-mZK equation. This
equation can reflect the prop?agation characteristics of Rossby waves in
space, and is more suitable for real oceans and atmosphere than the
(1+1)-dimensional model. According to the pa?rameter composition of the new
model, it can be seen that the effect of the complete Coriolis force affects
not only the longitudinal structure of the model, but also the amplitude
structure of the non-linear long wave.
Geothermal characteristics of the Xianshuihe fault zone and their engineering influence on tunnel construction
Authors: Yuan Dong , Xiao Kun , Feng Tao , Zhang Guang-Ze , Xu Zheng-Xuan , Wang Zhe-Wei , Yi Xiao-Juan , Lin Zhi-Heng , Zhang Zhi-Long , Zhang Ru , Qi Ji-Hong
Published: March 2023

The Zheduo Mountain tunnel crosses the Xianshuihe fault zone in Kangding
city. The Xianshuihe fault zone is composed of many large-scale faults and
features a complex geological structure and strong geothermal activity.
Based on geothermal drilling data, hydrogeological tests and the geothermal
geological back-ground of the study area obtained via hydrogeological
surveys and hydrogeo-chemical methods in the process of tunnel surveying,
this paper explores the exposure characteristics and distribution of
geothermal water in the study area, analyses its hydrogeochemical and
isotopic characteristics, and thoroughly studies the hydrogeological
structure of the geothermal water to explore the genetic mechanism
responsible for the formation of the geothermal water. The influence of the
geothermal water and high ground temperatures on tunnel construction is
further predicted, and practical and effective engineering treatment
suggestions are proposed.
Study on mechanical properties and acoustic emission response of deep granite under hydro-mechanical coupling
Authors: Hao Qi-Jun , Zhang Zhao-Peng , Wang Xin-Zhong , Zhang Ru , Zhang An-Lin , Zhang Lan-Bin , Lou Chen-Di
Published: March 2023

The study on the mechanical response of deep rock under hydromechanical
couplings condition can guide the safe excavation and stability evaluation
of deep tunnel engineering. The effects of monotonic loading and cyclic
loading on the mechanical properties of granite under 5 MPa pore water
pressure and 10 MPa confining pressure were studied by laboratory tests.
Before the peak stress, the permeability under monotonic loading was
significantly higher than that under cyclic loading, and the permeability
under cyclic loading increased sharply after the peak stress. There were two
active periods of the acoustic emission energy before peak stress under
monotonic loading, but it was always in relative quiet period under cyclic
loading before peak stress. Based on the energy theory, the energy evolution
of granite was discussed. The dissipation energy can better reflect the
effect of loading mode on the energy evolution.
Correlation between micro-structure and acoustic emission characteristics of granite by split tests
Authors: Geng Qian-Cheng , You Shuang , Wang Huan , Ji Hong-Guang , Zhang Xiu-Feng , Chen Yang
Published: March 2023

The mesoscopic structure of rocks determines their strength and deformation
characteristics. The grain and pore size distribution of granite samples
buried depth of 1600 m to 1900 m in a goldmine of Shandong Province are
measured by polarizing microscope and low-field nuclear magnetic resonance.
The splitting test is carried out and the acoustic emission signal is
obtained in real time by using an electro-hydraulic servo press and PCI-2
acoustic emission collector. The relationship between meso-mechanics and
acoustic emission characteristics of split granite is analyzed. The
experimental result shows that there is no clear correlation between
meso-grain size and pore size distribution. Rocks with larger mineral grains
easily form inter-embedded structures between grains and grains, the bearing
effect of grains is enhanced, and the tensile strength of rocks is improved.
The level of stress concentration in the rock is closely related to the pore
size of the rock, and the acoustic emission ringing count before the main
rupture in the large aperture (0.1~10 mm) of the rock is more active than
that of the small aperture rock (0.01~1 mm), and a large number of high
frequency acoustic signals are induced by the penetration between the pores
in the unstable failure stage and post-peak failure stage, the stress
concentration is higher, and the energy release frequency is increased,
however the energy released strength by a fracture is weak.
Size optimization and co-operative support mechanism of coal pillar in residual resources recovery working face
Authors: Gong Peng , He Ze-Xin , Ma Zhan-Guo , Zhou Feng-Yu , Li Yang
Published: March 2023

In this paper, a numerical calculation model of the mining face was
established to analyze the rational size of coal pillars in the goaf on both
sides by using FLAC3D based on the mining geological conditions in the pilot
area. Furthermore, the feasibility of co-ordinated reinforcement with steel
pipe column was explored, which can be applied to the recycling of residual
coal resources like protecting coal pillars and of great value to increase
the recovery rate in gobs as well.
Infrared thermal wave detection of interfacial debonding defects of thermal barrier coatings based on non-linear frequency modulation
Authors: Tang Qing-Ju , Zhang Tao , Gu Zhuo-Yan , Bu Chi-Wu
Published: March 2023

In order to improve the reliability of detecting the debonding defects at the
interface of thermal barrier coatings (TBC), a non-linear frequency
modulated (NLFM) infrared thermal wave detection method is proposed. A NLFM
infrared thermal wave detection system is built, and zirconia TBC specimens
are prepared and tested. The effects of defect diameter, excitation power,
initial frequency and termination frequency on the defect detection effect
are analyzed. Three algorithms such as principal component analysis (PCA)
are used to process the image sequence, and the signal-to-noise ratio (SNR)
of each sequence processing algorithm is calculated and compared. The
results show that the larger the diameter of the defect, the easier it is to
be detected, and the appropriate adjustment of the excitation power or the
reduction of the initial and termination frequencies is beneficial to the
detection of defects. Compared with the other two algorithms, the PCA method
is more effective for image sequence processing. It offers a reference for
detecting debonding flaws at the TBC interface.
A matrix geometric solution of a multi-server queue with waiting servers and customers’ impatience under variant working vacation and vacation interruption
Authors: Ziad Ines , Laxmi Vijaya , Bhavani Girija , Bouchentouf Amina , Majid Shakir
Published: March 2023

This paper deals with a M/M/c queueing system with waiting servers, balking, reneging, and K-variant working vacations subjected to Bernoulli schedule vacation interruption. Whenever the system is emptied, the servers wait for a while before synchronously going on vacation during which services are offered with a lower rate. We obtain the steady-state probabilities of the system using the matrix-geometric method. In addition, we derive important performance measures of the queueing model. Moreover, we construct a cost model and apply a direct search method to get the optimum service rates during both working vacation and regular working periods at lowest cost. Finally, numerical results are provided.
Tirzepatide reduces appetite, energy intake and fat mass in people with T2D
Authors: Heise Tim , Hans DeVries J , Urva Shweta , Li Jing , Pratt Edward J. , K. Thomas Melissa , Mather Kieren J. , A. Karanikas Chrisanthi , Dunn Julia , Haupt Axel , Milicevic Zvonko , Coskun Tamer
Published: March 2023

  

OBJECTIVE: To evaluate effects of tirzepatide on body composition, appetite and energy intake to address the potential mechanisms involved in body weight loss with tirzepatide.

RESEARCH DESIGN AND METHODS: In a secondary analysis of a randomized, double-blind, parallel-arm study, the effects of tirzepatide 15 mg (N=45), semaglutide 1 mg (N=44) and placebo (N=28) on body weight and composition, appetite, and energy intake were assessed at baseline and Week 28.

RESULTS: Tirzepatide treatment demonstrated significant reductions in body weight compared to placebo and semaglutide, resulting in greater fat mass reduction. Tirzepatide and semaglutide significantly reduced appetite vs placebo. Appetite scores and energy intake reductions did not differ between tirzepatide and semaglutide. 

CONCLUSIONS: Differences in energy intake during ad libitum lunch were not sufficient to explain the different weight outcomes. Further evaluation is needed to assess mechanistic differences related to tirzepatide actions on 24-hour energy intake, substrate utilization and energy expenditure.