bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fast Speckle Noise Suppression Algorithm in Breast Ultrasound Image Using Three-Dimensional Deep Learning
Authors: Li Xiaofeng , Wang Yanwei , Zhao Yuanyuan , Wei Yanbo 
Published: April 2022

The rapid development of ultrasound medical imaging technology has greatly broadened the scope of application of ultrasound, which has been widely used in the screening, diagnosis of breast diseases and so on. However, the presence of excessive speckle noise in breast ultrasound images can greatly reduce the image resolution and affect the observation and judgment of patients’ condition. Therefore, it is particularly important to investigate image speckle noise suppression. In the paper, we propose fast speckle noise suppression algorithm in breast ultrasound image using three-dimensional (3D) deep learning. Firstly, according to the gray value of the breast ultrasound image, the input breast ultrasound image contrast is enhanced using logarithmic and exponential transforms, and guided filter algorithm was used to enhance the details of glandular ultrasound image, and spatial high-pass filtering algorithm was used to suppress the excessive sharpening of breast ultrasound image to complete the pre-processing of breast ultrasound image and improve the image clarity; Secondly, the pre-processed breast ultrasound images were input into the 3D convolutional cloud neural network image speckle noise suppression model; Finally, the edge sensitive terms were introduced into the 3D convolutional cloud neural network to suppress the speckle noise of breast ultrasound images while retaining image edge information. The experiments demonstrate that the mean square error and false recognition rate all reduced to below 1.2% at the 100th iteration of training, and the 3D convolutional cloud neural network is well trained, and the signal-to-noise ratio of ultrasound image speckle noise suppression is greater than 60 dB, the peak signal-to-noise ratio is greater than 65 dB, the edge preservation index value exceeds the experimental threshold of 0.45, the speckle noise suppression time is low, the edge information is well preserved, and the image details are clearly visible. The speckle noise suppression time is low, the edge information is well preserved, and the image details are clearly visible, which can be applied to the field of breast ultrasound diagnosis.
Syphilis Self-Testing Among Female Sex Workers in China: Implications for Expanding Syphilis Screening
Authors: Wang Cheng , Li Xia , Wang Yajie , Yang Bin 
Published: April 2022

BackgroundSyphilis self-testing (SST) may help expand syphilis test uptake among female sex workers. However, there has been no studies on examining SST among female sex workers. We aim to examine SST experience and its determinants among female sex workers in China.MethodsA venue-based, cross-sectional study of female sex workers was conducted in eight Chinese cities in 2019. Participants completed a survey including socio-demographic characteristics, sexual behaviors, and SST history. Multivariable logistic regression was conducted to evaluate the associated factors with SST.ResultsAmong 1,287 Chinese female sex workers, 72.1% (928/1,287) had ever tested for syphilis, and 5.9% (76/1,287) had ever used syphilis self-testing. Among syphilis self-testers, more than half (57.9%, 44/76) reported that the self-test was their first syphilis test, around one-fifth (18.4%, 14/76) reported that syphilis self-testing results influenced the price of commercial sex. After adjusting for covariates, female sex workers who received anal sex in the past month (adjusted odds ratio [aOR]: 2.6, 95%CI: 1.5–4.3, p &lt; 0.001), used drugs before or during sex (aOR: 3.8, 95%CI: 2.3–6.4, p &lt; 0.001), tested for other sexually transmitted infections (STIs) in the past 6 months (aOR: 3.4, 95%CI: 1.9–6.0), ever tested in the hospital (aOR: 5.1, 95%CI: 2.5–10.4, p &lt; 0.001), and ever tested in the community (aOR: 1.7, 95%CI: 1.3–2.2, p &lt; 0.001) were more likely to perform syphilis self-testing.ConclusionsSyphilis self-testing has the potential to expand testing coverage, and increase testing frequency with limited potential harms among FSW. Further evaluation on the intervention effects based on syphilis self-testing among FSW are needed.
Application of the Jigsaw Puzzle Flap Based on Freestyle Perforators to Repair Large and Deep Ulcers on the Buttocks
Authors: Chen Xiaoming , Huang Biao , Xiao Haitao , An Lu , Su Wenxing , Yu Daojiang 
Published: April 2022

BackgroundDecubitus ulcers are common skin injuries in plastic and burn surgery departments, usually occur in patients with a long disease course and poor underlying health. Designing a reconstruction procedure with safety blood supply to a large volume soft tissue and resulting in minimal trauma is a priority for surgeons.MethodsThe free-style perforators on the potential donor sites surrounding the ulcers were detected by Doppler, and the area of the ulcer was divided into several sections based on the location of pre-design perforator flaps. According to the insertion point of the perforators, small V-Y advancement flaps, propeller flaps and rotation flaps pedicled with freestyle perforators were formed and moderately modified during surgery. All of the small flaps were transplanted from donor sites to the defect and reassembled into a new composite flap to repair the ulcer. The donor sites were directly closed. The area of the flaps ranged from 7.0 × 10.5 cm to 8.0 × 22.0 cm and the diameter of the pedicle perforators ranged from 0.5 to 4.0 mm.ResultsIn 30 patients, 65 flaps were constructed, and all of the flaps survived with direct closure of all donor sites. One case with effusion healed 1 month postoperatively through draining and application of a mild pressure dressing. After a 3–24 months follow-up period, all of the patients were satisfied with post-operative function and appearance, and only one case had a local recurrence 6 months postoperatively.ConclusionThe jigsaw puzzle flap based on freestyle perforators can repair the large skin and soft tissue defects caused by decubitus ulcers on the buttocks, with direct donor flap area closure. This method is easy to perform with a safe blood supply and minimal trauma resulting from the avoidance of microvascular anastomosis and the conventional myocutaneous flap.
Clinical Study on the Treatment of Female Stress Urinary Incontinence With Modified Buzhong Yiqi Decoction
Authors: Zhou Feifei , Chen Chen , Shi Jiani , Zhou Qianru , Jin Lijun , Ma Xiaofang 
Published: April 2022

PurposeTo study the clinical application value of Modified Buzhong Yiqi Decoction in the treatment of female stress urinary incontinence (SUI).MethodsA total of 103 female patients with SUI were included in this study, 13 were lost to follow-up, and the final number of studies was 90. General information about the patients, including age, years of menopause, body mass index (BMI), reproductive history, chronic respiratory disease, hypertension, and diabetes, were recorded. All the patients were treated with Modified Buzhong Yiqi Decoction alone for 4 weeks. The Patient Global Impression of Improvement (PGI-I), the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form (ICI-QSF) and 72-h voiding diary were used to evaluate the patients' subjective symptoms and urinary incontinence degree before treatment, 1 month after treatment and 1 year after treatment, the efficacy and efficacy-related factors of Modified Buzhong Yiqi Decoction in the treatment of female SUI were analyzed.ResultsOne month after Modified Buzhong Yiqi Decoction treatment, compared with before treatment, the PGI-I questionnaire was very much better (68.89%), much better (8.89%), a little better (12.33%), no change (8.89%), the ICI-QSF score decreased (P &lt; 0.05), and 72-h urine leakage frequency decreased (P &lt; 0.05); One year after treatment compared with before treatment, the PGI-I questionnaire was very much better (40.00%), much better (17.78%), a little better (12.22%), no change (30.00%), the ICI-QSF score decreased (P &lt; 0.05), and 72-h urine leakage frequency decreased (P &lt; 0.05); and 1 year after treatment compared with 1 month after treatment, the ratio of very much better at 1 year after treatment was significantly decreased (P &lt; 0.05), the score of the ICI-QSF was significantly increased (P &lt; 0.05), and 72-h urine leakage frequency was significantly increased (P &lt; 0.05). The correlation analysis showed that the efficacy at 1 month after treatment was negatively correlated with the severity of SUI and chronic respiratory diseases, but was not significantly correlated with age, menopause status, BMI, number of pregnancies, and number of births. The efficacy at 1 year after treatment was negatively correlated with the severity of SUI, chronic respiratory disease, age, and number of births and was positively correlated with BMI, but not significantly correlated with menopause status and number of pregnancies.ConclusionModified Buzhong Yiqi Decoction can effectively treat SUI in women. The efficacy is related to the severity of SUI and chronic abdominal hypertension, but the long-term efficacy decreases.
Algunas consideraciones sobre el impacto del covid-19 en el transporte aéreo de Ecuador
Authors: Carrera Bravo María Annabelle , Mero Rivera Ronald Francisco , Montilla Pacheco Argenis De Jesús , Becerra Ávila Mauricio Arturo 
Published: April 2022

Las pandemias son fenómenos que forman parte de la historia del mundo, trayendo consecuencias sanitarias, socio-económicas y ambientales. Este trabajo tuvo como objetivo analizar el impacto de la pandemia del COVID-19 en el transporte aéreo comercial mundial con énfasis en el caso ecuatoriano. Para desarrollar la investigación se efectuó una revisión de fuentes de publicación reciente disponibles en Google académico, Latindex, Redalyc, Medline y Scielo; se consideraron publicaciones en inglés y castellano, por medio de descriptores asociados al tema tratado. Se encontró que la pandemia desencadenó consecuencias financieras en las aerolíneas que operan vuelos comerciales, incluso, algunas al borde de la quiebra, especialmente en la segunda mitad del 2020, cuando los aeropuertos mantenían cierre de operaciones por decisión de las autoridades competentes; por lo cual, resulta necesario que las empresas de este sector tomen las previsiones para enfrentar exitosamente la ocurrencia de nuevas situaciones que seguramente se presentarán a futuro

Palabras clave: Pandemia, Transporte aéreo, Distanciamiento social, Salud.
Consecuencias de los riesgos psicosociales en el desempeño de los trabajadores de una terminal Portuaria en Guayaquil
Authors: Llanos Encalada Mónica Pilar , Caicedo Torres Caroline Alexandra 
Published: April 2022

Las actividades laborales, en el sector portuario trae consigo altas exigencias y presiones de movilización de carga y cumplimiento de indicadores de productividad, afectando el desempeño laboral y la salud del trabajador. El objetivo de esta investigación es determinar las consecuencias de los riesgos psicosociales en el desempeño de los trabajadores de una Terminal Portuaria en Guayaquil. Su enfoque es mixto, cuantitativo y cualitativo de alcance descriptivo, basado en un diseño no experimental, realizada a 24 colaboradores del área de operaciones; se utiliza el método analítico sintético sobre estadísticas de los factores de riesgos psicosociales y la evaluación de desempeño. Se aplica el método estadístico de correlación de Pearson para determinar la relación entre las variables. El estudio muestra que el factor “Exigencias Psicológicas” presenta un nivel de riesgo alto en los trabajadores y los resultados analizados determinan que existe una relación directa entre el factor de exigencias psicológicas y los niveles de desempeño evaluados (eficiencia, eficacia y productividad).

Palabras clave: Factores de riesgo psicosocial, desempeño laboral, gestión portuaria
Pengaruh Tingkat Kesehatan Bank Dengan Metode Risk Based Bank Rating (RBBR) Terhadap Kinerja Keuangan (Studi Pada Bank Umum Kategori BUKU 3 Periode Tahun 2018-2020)
Authors: Jaelani Achmad , Purwanti Winaya 
Published: April 2022

Penelitian ini bertujuan menganalisis pengaruh tingkat kesehatan bank dengan metode Risk Based Bank Rating (RBBR) terhadap kinerja keuangan Bank Umum berdasarkan Kegiatan Usah (BUKU 3). Penelitian ini merupakan penelitian kuantitatif dengan metode deskriptif berupa data sekunder diambil dari laporan keuangan publikasi Bank tahun 2018-2020. Jumlah populasi 20 dan sampel 10 Bank. Berdasarkan hasil koefisien determinasi disimpulkan bahwa sebesar 57,30% variabel kinerja keuangan di pengaruhi oleh variabel tingkat kesehatan bank yang diukur melalui GCG, NIM, LDR, NPL dan CAR, sedangkan sisanya sebesar 42,70% dipengaruhi oleh variabel lain yang tidak dimasukan dalam penelitian ini. Secara simultan variabel tingkat kesehatan bank (GCG, NIM, LDR, NPL dan CAR) berpengaruh pada variabel kinerja keuangan (ROA) pada Bank umum kategori BUKU 3 periode tahun 2018-2020. Secara parsial variabel Profil Risiko, GCG dan Permodalan tidak terdapat pengaruh dengan variabel Kinerja Keuangan. Sedangkan variabel Rentabilitas secara parsial terdapat pengaruh terhadap Kinerja Keuangan
REVIEW OF METHODS FOR ORGANIZING OF UNDERGROUND COMMUNICATIONS AND PROSPECTS FOR USING THE MEDIUM WAVE RANGE IN MINES
Authors: ФЕДОСОВ Д.В. , НИКОЛАЕВ А.В. , КОЛЕСНИКОВ А.В. , ЛАПИН С.Э. , БАБЕНКО А.Г. 
Published: April 2022

В настоящее время растет потребность в организации устойчивой и доступной связи в подземных горных выработках, связанная с увеличением их протяженности и глубины,развитием объемно-планировочных решений в общем объеме шахты, повышением требований к уровню автоматизации и безопасности горных работ. Существует множество различных технических решений и подходов, позволяющих организовать подземные линии связи в диапазонах от сверхнизких (СНЧ)до сверхвысоких частот (СВЧ). В статье проведен анализ возможностей различных технических решений для организации подземной связи и рассмотрена физическая сторона процесса излучения, распространения и приема электромагнитных волн. Обсуждаются перспективы организации подземной связи в диапазоне средних (СВ)и коротких (КВ)радиоволн (от сотен кГц до единиц МГц): вдоль однопроводной и двухпроводной линий передачи, а также связь через горную породу без направляющих линий передачи.
Currently, there is a growing need for the organization of stable and accessible communication in underground mine workings, caused by the increase in their length and depth, the development of space-planning solutions in the total volume of the mine, and increased requirements for the level of automation and safety of mining operations. There are many different technical solutions and approaches that make it possible to organize underground communication lines in the ranges from ultra-low to ultra-high frequencies. The article analyzes the possibilities of various technical solutions for organizing underground communications, examines the physical side of the process of radiation, propagation, and reception of electromagnetic waves. The prospects for organizing underground communications in the range of medium and high frequencies radio waves (from hundreds of kHz to several MHz) are considered: along monofilar and bifilar transmission lines, as well as through-the-earth communication without guide lines.
Breathing Disturbances as Comorbidity of Rett Syndrome
Authors: Куликова С.Л. , Кузнецова А.В. , Савченко М.А. , Лихачев С.А. , Плешко И.В. , Мясников С.О. 
Published: April 2022

Синдром Ретта (СР) орфанное Х-сцепленное заболевание, встречающееся преимущественно у девочек с частотой от 1:9000 до 1:22 000. Нарушение дыхания является наиболее часто встречающимся коморбидным состоянием при СР. Спектр нарушений достаточно широк: гипо- и гипервентиляция, задержка дыхания, центральное и обструктивное апноэ, маневр Вальсальвы, тахипноэ, апнейстическое и периодическое дыхание. Согласно данным литературы, гипервентиляция у детей, страдающих СР, встречается в 26100 случаев, задержка дыхания в 5894. Поскольку у девочек с СР эпилептиформные изменения на ЭЭГ, как и эпилепсия, являются частыми сопутствующими расстройствами, гипервентиляция и эпизоды задержки дыхания нередко ошибочно трактуются как бессудорожные эпилептические приступы. Единственным методом диагностики является электроэнцефалография (ЭЭГ) данного пароксизма. В статье рассматриваются распространенность, патогенез, клинические проявления дыхательных нарушений при СР, приводится собственное клиническое наблюдение с описанием ЭЭГ во время гипервентиляции.
Rett syndrome (RS) is an orphan X-linked disease that occurs mainly in girls with a frequency of 1:9000 to 1:22 000. Respiratory failure is the most common comorbid condition in RS. The spectrum of violations is quite wide: hypo- and hyperventilation, breath holding, central and obstructive apnea, Valsalva maneuver, tachypnea, periodic breathing. According to the literature, hyperventilation in children suffering from RS occurs in 26-100 of cases, respiratory arrest in 58- 94. Since epileptiform changes on the EEG, as well as epilepsy, are frequent concomitant disorders in girls with RS, hyperventilation and episodes of breath-holding are often mistakenly treated as non-convulsive epileptic seizures. The only diagnostic method is electroencephalography (EEG) of this paroxysm. The article presents literature data on the prevalence, pathogenesis, clinical manifestations of respiratory disorders in RS, and provides its own clinical observation describing EEG during hyperventilation.
KOMPARASI JENIS CASCARA DAN PERIODE FERMENTASI TERHADAP KARAKTERISTIK KOMBUCHA CASCARA
Authors: Trihaditia Riza , , Yuliani , Priambodo Romansyah 
Published: April 2022

Kopi telah lama dibudidayakan di Indonesia. Dalam pengolahannya, dihasilkan buangan berupa kulit kopi yang jika tidak diolah lebih lanjut dapat menjadi limbah dan menimbulkan masalah bagi lingkungan. Kulit kopi bisa dimanfaatkan menjadi teh yang disebut cascara dan bisa ditingkatkan manfaatnya dengan difermentasi menjadi kombucha. Penelitian ini bertujuan untuk mengetahui pengaruh jenis cascara (arabika dan robusta) dengan periode fermentasi (6, 8 dan 10 hari) untuk mencari respon paling optimum dari panelis terhadap warna, rasa, aroma dan kekentalan kombucha cascara. Rancangan penelitian dibuat menjadi 6 sampel tanpa ulangan dan dilakukan uji fisikokimia (gula, alkohol dan pH) sebagai informasi tambahan. Respon dari panelis didapatkan dengan melakukan uji hedonik dan dianalisis menggunakan Response Surface Methods. Hasil penelitian menunjukan bahwa jenis cascara dan periode fermentasi berpengaruh terhadap warna, rasa, aroma dan kekentalan kombucha cascara. Sampel R6, R8 dan R10 menjadi sampel terbaik dari warna. Sampel A6, A8, R6 dan R10 menjadi sampel terbaik dari rasa. Sampel R6 dan R8 merupakan sampel terbaik dari aroma dan sampel R6 adalah sampel terbaik dari kekentalan. Sampel paling optimum terdapat pada sampel R6 yaitu kombucha cascara dari jenis robusta pada periode fermentasi 6 hari dengan kandungan gula 9,4°Brix, alkohol 0% dan pH 3,5.
ANALISIS PENERAPAN TOTAL PRODUCTIVE MAINTENANCE (TPM) MELALUI METODE OVERALL EQUIPMENT EFFECTIVENESS (OEE) PADA MESIN PACKER DI PABRIK SEMEN PT. XYZ
Authors: Pratama M. Agung , Kurniawan Fadly Ahmad , Irwan Ade 
Published: April 2022

XYZ is a manufacturing company engaged in the production of red and white cement. PCC cement packaging uses the main machine, namely the Rotary Packer machine, the packaging depends on consumer demand. If consumer demand continues to increase, the packaging process will take place continuously without stopping, and on the contrary, if consumer demand decreases slightly, the packaging process will also take place less. The high downtime of the Packer 1 machine causes production targets to be achieved, delays in the distribution process, and non-productive activities for employees. Based on these problems, the calculation of the effectiveness value on the Packer 1 machine using the Overall Equipment Effectiveness (OEE) method. Which aims to determine the value of OEE (Overall Equipment Effectiveness) of the Packer 1 machine, to determine the comparison of the OEE value of the Packer 1 machine with international OEE values, and to determine the priority factors for repair and the root causes of problems and solutions. Based on the results of data processing, it can be concluded that the Packer 1 machine OEE value is 16.98% which is obtained from the Availability Ratio value of 49.48%, the Performance Efficiency Ratio of 30.04 and the Rate of Quality product of 100%.
Multi-colour GaN-based LEDs with trench structure
Authors: Kim Garam , Kim Jang Hyun , Kim Sangwan 
Published: April 2022

Abstract
Conventional white LEDs are implemented by converting part of the light generated from the blue multi-quantum well (MQW) into yellow light through a phosphor. However, in order to implement a white LED with higher efficiency, there is a need for a method capable of emitting multiple colours in GaN-based LED itself without a phosphor. In this study, the MQW is optimized through TCAD simulation and a trench structure is applied to implement a multi-colour LED.
Growth of α-(AlGa)2O3 alloy thin films on c-sapphire substrates by mist chemical vapor deposition using acetylacetonated Al and Ga solutions
Authors: Ohta Marika , Tamura Hiroto , Uno Kazuyuki 
Published: April 2022

Abstract

α-Ga2O3 is a semi-stable phase of Ga2O3 and is known as an ultra-wide-bandgap semiconductor material. α-(AlGa)2O3 alloys are important for their applications in electronic and optoelectronic devices. We investigated the growth mechanism and process of α-(AlGa)2O3 alloys by mist chemical vapor deposition using acetylacetonated Al and Ga aqueous solutions. The contribution of acetylacetonated Al ions to the epitaxial growth was investigated. The effects of an anchoring mechanism on the mosaic spread were experimentally evaluated. Investigating

10

1

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4

X-ray diffraction profiles, strain relaxation processes in film formations are discussed.
4.4 kV β-Ga2O3 MESFETs with power figure of merit exceeding 100 MW cm−2
Authors: Bhattacharyya Arkka , Sharma Shivam , Alema Fikadu , Ranga Praneeth , Roy Saurav , Peterson Carl , Seryogin Geroge , Osinsky Andrei , Singisetti Uttam , Krishnamoorthy Sriram 
Published: April 2022

Abstract

β-Ga2O3 metal–semiconductor field-effect transistors are realized with superior reverse breakdown voltages (V
BR) and ON currents (I
DMAX). A sandwiched SiN
x
dielectric field plate design is utilized that prevents etching-related damage in the active region and a deep mesa-etching was used to reduce reverse leakage. The device with L
GD = 34.5 μm exhibits an I
DMAX of 56 mA mm−1, a high I
ON/I
OFF ratio >108 and a very low reverse leakage until catastrophic breakdown at ∼4.4 kV. A power figure of merit (PFOM) of 132 MW cm−2 was calculated for a V
BR of ∼4.4 kV. The reported results are the first >4 kV class Ga2O3 transistors to surpass the theoretical unipolar FOM of silicon.