bluuebunny/crossref_metadata_2025 huggingface dataset:
PREDICTION AND PREVENTION OF PURULENT-INFLAMMATORY COMPLICATIONS OF POST-SURGERY WOUNDS
Authors: Miroshnychenko Dmitrii Alekseevich , Belodid Evgenii Aleksandrovich
Published: March 2020

Improvement of the methods for prognosis and prevention of the post−surgery wound complications based on the use of new technologies in microbiology and surgery is of a great importance today. In order to develop and improve such methods, a study has been performed and it involved 230 patients who received a surgical treatment. Clinical and laboratory, biochemical, histological and microbiological methods have been applied. An automatic microbiological analyzer has been applied to identify and determine the sensitivity of the isolated microorganisms to antibacterial agents. The admission of the patient to a hospital assessed the degree of risk of purulent−inflammatory complications in the post−surgery wound on clinical grounds, namely they are: age (over 50 years old), disease duration (longer than 18 hours), accompanying pathology, unpredictable amount of surgical intervention. In the presence of these factors, the patients were assigned to the group of risk of purulent−inflammatory complications in the post−surgery period. To determine a more reliable prognosis, the bactericidal value of the patient's serum was evaluated for detecting the intensity of inhibition of anti−infective defense mechanisms. This allows during the preoperative period the prediction of not only purulent−inflammatory complications, but also identifying the microflora that contributes to their occurrence. As a result of this research, an algorithm for predicting and preventing the purulent−inflammatory complications of the post−surgery wounds was developed. In the case of establishing the fact of a suppression of protective anti−infective mechanisms of the organism in the preoperative period, the patients were given antibacterial prophylaxis with selection of the most effective drug.

Key words: surgical interventions, purulent−inflammatory complications, mechanism of anti−infective resistance.
INFLUENCE OF RIGHT VENTRICULAR LEAD IMPLANTATION SITE CHOICE ON PACING EFFICIENCY
Authors: Lopyn Dmitrii Aleksandrovich , Rybchynskyi Stanislav Valerevich , Volkov Dmitrii Evgenevich
Published: March 2020

Currently the electrophysiological treatment options have been considered to be the most effective for many patients with arrhythmogenic cardiomyopathies, as well as in those with arrhythmias on the background of heart failure. Currently, the dependence of efficiency of the pacemakers on the location of the electrodes has been proven. In order to study the effect of a myocardial dysynchrony on the effectiveness of pacing depending on the location of the right ventricular electrode, an investigation has been performed. This study comprised the patients with a complete atrioventricular block, preserved ejection fraction of the left ventricle (more than 50 %), with no history of myocardial infarction, who were implanted with the two−chamber pacemaker. It has been established that the best results were achieved with a stimulation of the middle and lower septal zone of the right ventricle, the worst ones were obtained with a stimulation of its apex. It has been found that the dynamics of the magnitude of segmental strains and a global longitudinal strain coincided with the dynamics of other parameters of the pacemaker effectiveness, which indicated the pathogenetic value of myocardial dysynchrony in the progression of heart failure after implantation of the pacemaker. Therefore it could be concluded that the studying of myocardial mobility by determining a longitudinal strain for assessing the functional state of the myocardium and the effectiveness of pacing is highly advisable. It is emphasized that the use of the latest strains−dependent techniques for cardiac performance evaluation in the patients with bradyarrhythmia have a great potential to predict the development of chronic heart failure and to choose the optimal method of physiological stimulation of the heart.

Key words: right ventricular lead, cardiac stimulation, myocardial dyssynchrony.
STATE OF THE ART OF DISCOORDINATED LABOR PROBLEM
Authors: Zviahina Natalia Yurevna
Published: March 2020

The course and result of childbirth for mother and fetus was evaluated by comparing different ways of correction of discoordinated delivery (clinical protocols, using of epidural anesthesia, combined method with phosphatidylcholine). Among the abnormalities of labors, the frequency of those makes 18−20 %, a discoordination of labor has taken an important place. The discoordination means a disorder in coordinated contractions of different parts of an uterus. It is known that this pathology may result in a high incidence of operative delivery, birth injury, pathological blood losses, postpartum septic complications, maternal and perinatal morbidity. In order to assess the course and outcome of labor for the mother and the fetus, by comparing various methods of correction of discoordinated labor, 120 women in labor were examined, they were divided into clinical groups depending on the correction method described above. We have analyzed the indices of the partograms of women in childbirth, the results of hysterography and cardiotocography, levels of adrenaline, norepinephrine, prostaglandin F2α, endogenous oxytocin in the mother's blood. Hemodynamics in the uterine vessels and the ones of the fetoplacental complex was determined using dopplerometric investiagtions. The condition of the newborns was evaluated. Based on the investigation results of the birth outcome, it has been concluded that the application of phosphatidylcholine in the combined treatment of the discoordinated labor can significantly reduce the frequency of cesarean section surgeries, improve the condition of the fetus and newborn by normalizing the biologically active substances in blood of the mother and fetus, blood flow in the fetoplacental complex, and eliminate the occurrence of abnormal labor.

Key words: labor discoordination, phosphatidylcholine.
TREATMENT ADVANTAGES OF PATIENTS WITH URETEROLITHIASIS BY LITHOTRIPSY CONTACT METHODS IN COMPARISON WITH OPEN SURGERY
Authors: Biloruskyi Bogdan-Boris Olegovich
Published: March 2020

One of the most effective methods of treatment of ureteral concretions is ureteroscopy with contact lithotripsy. The study analyzed the results of treatment of 96 patients with urolithiasis they were as follows: 44 patients underwent laser ureterolithotripsy, 52 persons had an open ureterolithotomy. When comparing different treatments for patients with ureterolithiasis, it has been found that the average duration of surgery when performing laser ureterolithotripsy was shorter and averaged 53 minutes. As for open ureterolithotomy it lasted in average 102 minutes. The average length of patients staying in clinic when performing laser ureterolithotripsy in average was 2.5 days, during open ureterolithotomy that index was 20 days. This is a significant advantage of endoscopic treatment of ureterolithiasis versus an open surgery (especially when a holmium laser is used in lithotripsy). By using endoscopic methods of treatment of ureteral concretions instead of an open surgery (ureterolithotomy), it has been possible to reduce the in−patient staying 8 times. Lithotripsy with a holmium laser occurred to be an effective method of destroying the ureteral concretions of any mineral composition, if the dimensions of these calculi did not exceed 2 cm. It should be emphasized that under these conditions, the localization of a stone and the duration of its stay in the ureter are also not important. In addition, the use of a holmium laser minimizes an injury to the ureter wall. The advantages of lithotripsy when it used with a holmium laser consist in its high efficiency in destruction of solid fixed and the ingrown stones. In case of combination of both a stone and ureteral stricture and in the presence of ligature calculi, the treatment with a holmium laser is also prescribed.

Key words: ureterolithiasis, laser ureterolithotripsy, open ureterolithotomy, holmium laser.
Методика обґрунтування раціонального складу і швидкісного режиму роботи машинних агрегатів
Authors: Анікєєв О. , Сировицький К. , Агапов М. , Бойко А.
Published: March 2020

В статті наведено методику обґрунтування раціонального складу і швидкісних режимів роботи машинних агрегатів для виконання технологічних операцій при вирощуванні продукції рослинництва.Висновок про правильність вибору того чи іншого складу агрегату необхідний з урахуванням маневрових характеристик трактора і кінематичних параметрів робочої машини. Значення коефіцієнтів зчеплення ведучого апарату з ґрунтом та опору перекочування для різних агрофонів відіграє важливу роль у процесі вибору швидкісного режиму роботи, що в свою чергу покликано збільшити продуктивність, зменшити витрати палива та підвищити якість виконання технологічних операцій в рослинництві. Також науково-обґрунтований підхід до вибору складу агрегату дає можливість зменшити затрати праці та підвищити техніко-економічну ефективність використання машинно-тракторних агрегатів. В багатьох випадках, швидкість, яка визначається по енергонасиченості трактора, не може бути реалізована внаслідок агротехнологічних або фізіологічних обмежень. Економічні обмеження швидкості машинного агрегату обумовлені зміною енерговитрат на виконання процесу, експлуатаційної надійності машин в складі агрегату, а також деяким погіршенням використання часу зміни. В кожному окремому випадку швидкісні режими роботи необхідно уточнювати з урахуванням фізико-механічних властивостей ґрунтів, стану поверхні поля, фаз розвитку рослин, вологості ґрунту і інших факторів які впливають на якість роботи.Відповідність параметрів агрегату, перш за все виробничим умовам – є передумовою високої продуктивності агрегату. Із збільшенням ширини захвату агрегату пропорційно підвищується його продуктивність, а для посівних машин, обприскувачів і ряду інших – підвищується якість виконання роботи, внаслідок зменшення площі поля яка піддається дії ходових систем, зменшується кількість стикових міжрядь, поліпшуються умови технологічного обслуговування агрегату і скорочується кількість персоналу по його обслуговуванню.
Робота фронтального навантажувача в крановому режимі
Authors: Калінін Є. , Колєснік І. , Медведєв Є. , Шаповалов В. , Пітя В.
Published: March 2020

В даний час для потреб сільського господарства розроблено понад 30 різних навантажувачів напірного дії.Крім спільності технологічного процесу спостерігається і спільність конструктивного оформлення машин фронтальних навантажувачів – основні їх вузли ідентичні: опорна рама – для зв’язку навантажувача з трактором, підйомна рама або підйомна стріла, гідроциліндри підйому, робочий орган.Технологічний процес виконується фронтальним навантажувачем напірної дії в наступних режимах: режимі заглиблення, крановому і транспортному режимах.Добре відомо, що тільки на основі теорії коливань можуть бути повністю з'ясовані такі практично важливі проблеми, як урівноваження машин, крутильні коливання валів і зубчастих передач, прецесія обертових валів, коливання механізмів під дією рухомих вантажів. Лише за допомогою цієї теорії можна встановити найбільш вдалі конструкції, відсуваючі експлуатаційні умови роботи машин можливо далі від умов виникнення великих коливань.Питання динаміки важких машин набувають в даний час першорядне значення в зв'язку з тим, що в сільськогосподарське виробництво існують природні тенденції підвищити продуктивність робочих машин в результаті збільшення навантажень і посилення їх темпів роботи.Характер динамічних навантажень в виконавчих механізмах робочих машин багато в чому залежить від прийнятої технологічної схеми, від характеру операцій які повинні бути відтворені в процесі експлуатації, нарешті, від типу виконавчого механізму і приводу його.Технологічний процес роботи фронтальних навантажувачів напірної дії виконується ними за однією схемою: поступальне переміщення агрегату для захоплення матеріалу, що навантажується і навантаження його в транспортні ємності, підйом вантажу по вертикальній коловій траєкторії.Отримані залежності навантаженості несучих конструкцій навантажувача і трактора від їх конструктивних параметрів можуть бути використані конструкторськими організаціями при проектуванні нових фронтальних навантажувачів та інших знарядь, що фронтально навішуються на колісні трактори.
Обгрунтування конструктивних особливостей та кінематичний аналіз руху гичкоочисної машини
Authors: Ліннік А. , Диня В. , Семенів І. , Кирик О.
Published: March 2020

Зниження собівартості цукрової сировини поряд з підвищенням її якості дозволить підтримувати та підвищити конкурентноспроможність українських виробників цукру на міжнародному рівні, а також будуть створені передумови для зниження вартості кінцевого продукту на внутрішньому ринку. Одним із шляхів досягнення такої мети виступає застосування таких технічних рішень під час виробництва сировини які забезпечать зниження затрат праці та енергоємність процесів виробництва.В статті запропоновано конструкцію трирядної навісної машини призначеної для зрізування, подрібнення та розкидання по ширині захвату гички цукрових буряків, очищення залишків гички комбінованими та еластичними робочими органами, причому еластичні робочі органи закріплені на паралелограмному копіювальному механізмі та обертаються в протилежну сторону відносно зрізуючих. Робочі вали машини розміщені паралельно рядкам посівів культури, а робочі органи закріплені перпендикулярно. Зріз і подрібнення гички проводиться г-подібними ножами розміщеними попереду на висоті вищій за ріст коренеплодів. Після чого, комбінованим очисником, який складається з пари жорстких прутків встановлених на пружній підвісці та U-подібного еластичного бича, проводиться очищення залишків гички. Жорсткі прутки застосовуються з метою підняття і обриву полеглої та сухої гички та розбивання жмутка залишків гички на голівці коренеплоду, а пружна підвіска забезпечує таке прикладене зусилля, яке непошкодить тіло кореня. Еластичний очисник проводить послідуюче зчісування залишків гички з голівки коренеплоду. Доочисний пристрій встановлений під кутом до напрямку руху машини на паралелограмному копіювальному механізмі з регулювально-опорними полозами, а також встановлено привідний механізм зміни напряму обертання валів доочисника. Доочисник являє собою батарею набраних еластичних бичів.Проведено кінематичний аналіз руху машини та паралелограмного копіювального механізму. Отримано коефіцієнт кінематичного режиму роботи очисника з віссю обертання паралельною до напрямку переносної поступальної швидкості та рівняння шляху вертикального переміщення точок даного механізму з регулювально-опорним полозом в залежності від часу.Результатом дослідження є визначенні перспективи вдосконалення технології очищення гички цукрових буряків, запропоновано нову конструкцію очисної машини та проведено кінематичний аналіз паралелограмного копіювального механізму з регулювально-опорними полозами.
A COMPARISON BETWEEN TRANSURETHRAL CYSTOLITHOCLASTY AND VESICOLITHOTOMY IN PEDIATRIC MALE PATIENTS
Authors: Muhammed khalid  , Muhammad Faizan  , Muhammad Asif Gurmani  , Amjad Ali Siddiqui  , Qadeer Ahmed Choudhary  , Zulﬁqar Anjum
Published: March 2020

ABSTRACT

BACKGROUND & OBJECTIVE: To compare transurethral cystolithoclasty with ureteroscope over open vesicolithotomy in pediatric male patients.

METHODOLOGY: Study comprises of hundred pediatric male patients, divided into two equal groups of 50 each, labeled as Group-A and Group-B. All the patients having stones less than 20mm size (average 14mm) were included. Group-A patients were treated with transurethral cystolithoclasty by using ureteroscope and pneumatic lithoclast assisted with the help of Dormia basket. Group-B patients were treated with open vesicolithotomy.RESULTS: All hundred male pediatric patients were between the ages of 1-15 years (mean age 8 years). Hospital stay was 2-3 days (average 2.5 days) in Group-A patients and 3-5 days (average 4 days) in Group-B patients. In Group-A3 (6%) patients had urinary tract infection, 1(2%) had urethral injury and 2(4%) had residual stone post-operatively. While Group-B4 (8%) suﬀered from urinary tract infection, 1(2%) had wound infection, 1(2%) had hematuria, and 2(4%) had fever. Retention of urine was 1(2%) in each Group.

CONCLUSION: Transurethral cystolithoclasty is a much better way of treating vesical calculus in pediatric male patients because it is a procedure with short hospital stay, minimal invasion, no scar and less complication. KEYWORDS: Bladder Calculus, Comparison, Cystolithoclasty, Ureteroscope, Pneumatic Lithoclast, Dormia basket, Vesicolithotomy.
RESTORATION OF A POST-SURGICAL DEFECT BY MAGNETIC MAXILLOFACIAL PROSTHESIS: A CASE REPORT
Authors: Muhammad Aamir Raﬁque  , Khan Safana , Hira Ahmed
Published: March 2020

ABSTRACT:Edentulous patient with an intra-oral and extra-oral defect suﬀers from both functional loss and psychological distress. Magnets give a successful approach to rehabilitate the oral functions and improve the quality of life. This case report describes a simple method of fabricating a two part magnetic maxillofacial prosthesis.
KARAKTERISTIK IBU BERSALIN DENGAN INDIKASI SECTIO CAESAREA TAHUN 2012-2013 DI MEDICAL RECORD RSUD ARIFIN ACHMAD PEKANBARU
Authors: Maswarni Maswarni , Kumalasari Ayu
Published: March 2020

Sectio caesarea adalah pembedahan untuk melahirkan janin dengan membuka dinding perut dan dinding rahim. Tujuan penelitian: untuk mengetahui karakteristik ibu bersalin dengan indikasi sectio caesarea Tahun 2012-2013 di medical record RSUD Arifin Achmad Pekanbaru. Metodologi penelitian: jenis penelitian deskriptif, digunakan data sekunder yaitu seluruh ibu bersalin dengan indikasi sectio caesarea yang terdata di medical record RSUD Arifin Achmad Pekanbaru yang dilakukan pada tanggal 01-15 September 2014. Populasi dan sampel: seluruh data ibu bersalin dengan indikasi sectio caesarea sebanyak 319 ibu bersalin, dengan menggunakan lembar checklist. Analisis data: analisa Univariete. Hasil penelitian: karakteristik ibu bersalin dengan indikasi sectio caesarea tahun 2012-2013 adalah berdasarkan umur, pendidikan, pekerjaan, paritas, dan indikasi. Dimana umur adalah mayoritas umur 20-35 tahun sebanyak 243 responden (76,18%), dari pendidikan mayoritas SMA sebanyak 157 responden (49,22%), dari pekerjaan mayoritas IRT (Ibu Rumah Tangga) sebanyak 296 responden (92,79%), sedangkan dari paritas mayoritas multipara sebanyak 184 responden (57,68%), dan dari indikasi mayoritas Chepalo Pelvik Disproportion (CPD) sebanyak 65 responden (20,38%). Diharapkan kepada para petugas kesehatan RSUD Arifin Achmad Pekanbaru agar pelayanan dan evaluasi tindakan sectio caesarea meningkat, sehingga kejadian sectio caesarea dapat ditekan.
JOB SATISFACTION LEVEL DETERMINANT OF HYGIENE COLLEGE STAFF (STIKES) HANGTUAH PEKANBARU
Authors: Hasrianto Nofri
Published: March 2020

Globalization era humans have very imperotant role. Factors that can arise motivation and spirit is sense job satisfaction. If there is dissatisfaction from labor hence it will adversely effect to his job causes job satisfaction reflect a person feeling to his job and all he face in his work environment. Problems in this research are to know job satisfaction level of hygiene college staff Hangtuah Pekanbaru and also determinant of job satisfaction. Aims of this research is to know picture of job satisfaction and relevant factors with job satisfaction of hygiene vollege staff Hangtuah Pekanbaru in Riau Provice by using approach method Cross Sectional Study with 115 staff as sample. This research results are 50,4% unsatisfactory respondent, and there are 49,6% who satisfied. After conducted bivariate varible test which meaningful is marriage statue P value 0,003 and OR 3,446 while unmeaning age P value 0,264, gender P value 0,776, period of work P value 0,203, office statue P value 0,890 Thereby researcher suggest that decision maker in STIKES Hangtuah give enough developing opportunities to develop both thinking in work and also in carrier, give light work than heavy work, provide sufficiet income hence jobs satisfaction will be realized and otherwise if income less hence jobs satisfactory will be less too. Need an awareness for all respondent who not marriage that they need to contiuosly develob their skill and give solution each other between coworker if they met difficulties in their work cause seem that unmarried responderresponsders tended to unsatisfied.
SINTESIS DAN UJI AKTIVITAS ANTIOKSIDAN SENYAWA 3-(4-METOKSIFENIL)-5-NAFTALEN-1-IL-1-FENIL-4,5-DIHIDRO-PIRAZOL
Authors: Aisyah - , Jasril - , Teruna Hilwan Yuda
Published: March 2020

A pyrazoline analog, 3-(4-methoxy-phenyl)-5-naphtalen-1-yl-1-phenyl-4,5-dihydro-pyrazole (PF CA-4OMe) has been synthesized via intermolecular cyclization between substituted chalcones and phenylhydrazine using glacial acetic acid as a catalyst under microwave irradiation. The structure of the compound was characterized based on the interpretation of UV, FTIR, HRMS, 1H-NMR, 13C-NMR, HSQC and HMBC spectra. The antioxidant test was carried out by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. The result show that PF CA-4OMe was proved to have antioxidant activity with IC50 387,64 µg/mL.
GAMBARAN PENGETAHUAN DAN SIKAP MASYARAKAT TENTANG PEMAKAIAN GIGI TIRUAN DI DESA MAYANG PONGKAI KECAMATAN KAMPAR KIRI TENGAH KABUPATEN KAMPAR
Authors: Gumayesty Yeyen
Published: March 2020

Denture is a removable dental prosthesis which replaces the masticatory surface and accompanying structures of an upper arch and lower jaw. The function of dentures is the esthetic function recovery, which still lags tissue preservation, prevention of migration of teeth, chewing load distribution improvement. Denture should be kept clean to prevent further tooth loss, gingival inflammation or infection of bacteria and fungi and prevents the denture does not smell.The aim of research to describe the behavior of the public about the use of denture in Mayang Pongkai Village. Type a descriptive quantitative research. The population is the entire community of Mayang Pongkai Village Central Kampar Kiri with population 2663 people with a sample of 96 respondents. Sampling technique using stratified sampling. Analysis of the data used to describe the univariate independent and dependent variables are presented in the form of a frequency distribution. The research result most respondents did not wear a denture that is 70 respondents (72.9%), most of the respondents had a good knowledge ie 19 respondents (73.1%) and the majority of respondents have a negative attitude were 19 respondents (73%). Suggestions research is expected to generate awareness for the community to create dentures to dental health professionals are dentists who have partnered with dental techniques. Local health workers to conduct counseling on the risks of making dentures in non-health personnel and strive provide affordable dental care to the community.
IMPLEMENTATION OF BASIC IMMUNIZATION PROGRAM AT THE HEALTH CENTER IN THE DISTRICT OF KEPULAUAN MERANTI BANDUL 2016
Authors: Kiswanto - , Marina -
Published: March 2020

The basic program of immunization in infants is a condition of achieving complete primary immunization of all infants under one year of age. In 2015, the achievement of immunization programs in the clinic Pendulum Meranti Islands District by 40%, this condition is still below the target in each health center set 91% in 2015. This shows the obstacles in achieving the immunization program allegedly due to non-optimal management implementation of immunization health centers in the region of Pendulum. The purpose of this study is to analyze the management of immunization in health centers with respect to achieving basic immunization in infants at Puskesmas Pendulum. This study is a qualitative study aimed to analyze the implementation of management which includes P1 (Planning), P2 (Mobilization and Implementation) and P3 (Monitoring, Control and Assessment) in immunization programs in Puskesmas Pendulum. The results showed that the overall performance of the functions of management at the health center for immunization Pendulum still baik.Pengawasan against immunization activities khususnnya workshop is not routinely done every month. Knowledge and awareness among parents of infants to participate in immunization activities is still lacking. Supervision of the lack of supervision of immunization activities puskesmas head. There needs to be a shared commitment of the leadership and all officials immunization health centers health centers and implementing immunization to improve the implementation of management functions to increase the performance of health centers health centers especially immunization program to be achieved.
A New Model For Endocrine Glucose-Insulin Regulatory System
Authors: Al-Hussein Abdul-Basset , Tahir Fadhil
Published: March 2020

To gain insight into complex biological endocrine glucose-insulin regulatory system where the interactions of components of the metabolic system and time-delay inherent in the biological system give rise to complex dynamics. The modeling has increased interest and importance in physiological research and enhanced the medical treatment protocols. This brief contains a new model using time delay differential equations, which give an accurate result by utilizing two explicit time delays. The bifurcation analysis has been conducted to find the main system parameters bifurcation values and corresponding system behaviors. The results found consistent with the biological experiments results.
Evaluation and Improvement of Ventilation System Inside Low-Cost Automation Line to Reduce Particle Contamination
Authors: Puangburee Lamai , Busayaporn Wutthikrai , Kaewbumrung Mongkol , Thongsri Jatuporn
Published: March 2020

Low-Cost Automation (LCA) line, a group of machines to manufacture hard disk drive’s components located inside a clean room of factory, confronted with a problem of particle contamination caused by improper ventilation system. This article aims to evaluate airflow and proposes solutions to improve the ventilation system of LCA line based on Computational Fluid Dynamics (CFD). By using actual operating conditions collected at the factory and Fluent CFD software, the simulation showed that airflow patterns in such areas were substandard. For example, the large areas of vortex with the air velocities were lower than 0.2 m/s in critical areas: Fan Filter Units’ conveyor and Work Area. The low velocity of the airflow may cause the particle contamination and leads to the low-quality products. To reduce the particle contamination, we suggested novel solutions to the contamination problem. The CFD results revealed that our suggestions by increasing the momentum source (Sm) and/or redesign the LCA’s model by extending its height of cover where the increasing of Sm represented the increment of air velocity released from sources to the optimal values exhibited the decreasing of the vortex areas and also improved the air velocities in the critical areas to meet the factory’s standard.
SIMULATED PILOT-IN-THE-LOOP TESTING OF HANDLING QUALITIES OF THE FLEXIBLE WING AIRCRAFT
Authors: Portapas Vilius , Cooke Alastair
Published: March 2020

This article aims to indicate the differences between rigid and flexible wing aircraft flying (FQ) and handling (HQ) qualities. The Simulation Framework for Flexible Aircraft was used to provide a generic cockpit environment and a piloted mathematical model of a bare airframe generic high aspect ratio wing aircraft (GA) model. Three highly qualified test pilots participated in the piloted simulation trials campaign and flew the GA model with both rigid and flexible wing configurations. The results showed a negligible difference for the longitudinal HQs between rigid and flexible wing aircraft. However, significant changes were indicated for the lateral/directional HQs of the flexible wing aircraft. A wing ratcheting phenomenon manifested itself during the roll mode tests, the spiral mode exhibited neutral stability and the Dutch roll mode shape changed from a horizontal to a vertical ellipse. The slalom task flight tests, performed to assess the FQs of the aircraft, revealed the degradation of both the longitudinal and lateral/directional FQs.
Quantitative and Qualitative Results from Orbital Plane Precession of Medium-high Near-circular Orbits
Authors: Zhang Ming-Jiang , Zhao Chang-Yin , Xiong Jian-Ning , Zhu Ting-Lei , Zhang Wei
Published: March 2020

The theoretical analysis of Allan & Cook on the mechanisms of orbital plane precession for medium-high circular orbits is briefly reviewed, and the fact that there are two types of possible precession mechanisms (not only the classical Laplace precession) for the long-term evolution of the orbital plane of medium-high near-circular orbits is especially emphasized. Based on two types of possible precession mechanisms, the analytical formulae of the quantitative variation ranges of orbital inclination derived by Zhao et al. are revised, and the complete analytical formulae for medium-high near-circular orbits are obtained. The qualitative characteristic formula for the variation of orbital inclination-longitude of the ascending node of geostationary orbits in Zhao et al. is generalized to medium-high near-circular orbits, and the more general analytical formulae are obtained. Taking the near-circular orbits with the altitudes as the geosynchronous and medium orbits of the BeiDou navigation satellites as examples, the theoretically quantitative and qualitative results from orbital plane precession are verified by the first-order semianalytical calculations with simplified models and numerical calculations with precise models to a certain extent. Moreover, the specific quantitative and qualitative results for medium-high near-circular orbits with the given initial inclinations and different initial longitudes of the ascending node are particularly presented, from which some conclusions are summarized. Due to the high similarity of orbital plane precession for natural satellites to that of artificial satellites, the results and methodology in this paper can be directly extended to the long-term evolution of the orbital plane for natural satellites and help to understand and explain some orbit dynamic phenomena of natural satellites.
Explosions Driven by the Coalescence of a Compact Object with the Core of a Massive-star Companion inside a Common Envelope: Circumstellar Properties, Light Curves, and Population Statistics
Authors: Schrøder Sophie Lund , MacLeod Morgan , Loeb Abraham , Vigna-Gómez Alejandro , Mandel Ilya
Published: March 2020

We model explosions driven by the coalescence of a black hole or neutron star with the core of its massive-star companion. Upon entering a common-envelope phase, a compact object may spiral all the way to the core. The concurrent release of energy is likely to be deposited into the surrounding common envelope, powering a merger-driven explosion. We use hydrodynamic models of binary coalescence to model the common-envelope density distribution at the time of coalescence. We find toroidal profiles of material, concentrated in the binary’s equatorial plane and extending to many times the massive star’s original radius. We use the spherically averaged properties of this circumstellar material (CSM) to estimate the emergent light curves that result from the interaction between the blast wave and the CSM. We find that typical merger-driven explosions are brightened by up to three magnitudes by CSM interaction. From population synthesis models, we discover that the brightest merger-driven explosions, M

V
 ∼ −18 to −20, are those involving black holes because they have the most massive and extended CSM. Black hole coalescence events are also common; they represent about 50% of all merger-driven explosions and approximately 0.25% of the core-collapse rate. Merger-driven explosions offer a window into the highly uncertain physics of common-envelope interactions in binary systems by probing the properties of systems that merge rather than eject their envelopes.
Energetic Ion Dynamics Near the Cusp Region of Mercury
Authors: Jang E. , Zhao J.–T. , Yue C. , Zong Q.–G. , Liu Y. , Liu Z.–Y.
Published: March 2020

Energetic ions in Mercury’s magnetosphere are very dynamic, similar to those in the magnetosphere of Earth. In this study, we present two energetic proton observations by MErcury Surface, Space ENvironment, GEochemistry and Ranging near the cusp region of Mercury. For one case, we have observed a large flux of energetic protons while the other case has almost no flux, indicating that the near-cusp region may trap energetic particles under particular conditions. In order to understand under what conditions the near-cusp region of Mercury could trap energetic particles, we have used test particle simulations to trace the trajectories of single particles of different energies and pitch angles with a magnetic field model, KT17, that could closely represent the observed in situ magnetic field. Under different magnetic field geometries, the motions of single particles with various energies and pitch angles are different. The test particles can be trapped around the cusp region when the solar disturbance activity that generates the magnetic field local minimum near the cusp region is strong, while the particles cannot be trapped and escape along the magnetic field through the dawnside cusp when there is little solar activity.
Spectroscopic Confirmation of a Coma Cluster Progenitor at z ∼ 2.2
Authors: Darvish Behnam , Scoville Nick Z. , Martin Christopher , Sobral David , Mobasher Bahram , Rettura Alessandro , Matthee Jorryt , Capak Peter , Chartab Nima , Hemmati Shoubaneh , Masters Daniel , Nayyeri Hooshang , O’Sullivan Donal , Paulino-Afonso Ana , Sattari Zahra , Shahidi Abtin , Salvato Mara , Lemaux Brian C. , Fèvre Olivier Le , Cucciati Olga
Published: March 2020

We report the spectroscopic confirmation of a new protocluster in the COSMOS field at z ∼ 2.2, COSMOS Cluster 2.2 (CC2.2), originally identified as an overdensity of narrowband selected Hα emitting candidates. With only two masks of Keck/MOSFIRE near-IR spectroscopy in both H (∼1.47–1.81 μm) and K (∼1.92–2.40 μm) bands (∼1.5 hr each), we confirm 35 unique protocluster members with at least two emission lines detected with S/N > 3. Combined with 12 extra members from the zCOSMOS-deep spectroscopic survey (47 in total), we estimate a mean redshift and a line-of-sight velocity dispersion of z
mean = 2.23224 ± 0.00101 and σ
los = 645 ± 69 km s−1 for this protocluster, respectively. Assuming virialization and spherical symmetry for the system, we estimate a total mass of M
vir ∼ (1–2) ×1014
M
⊙ for the structure. We evaluate a number density enhancement of δ

g
 ∼ 7 for this system and we argue that the structure is likely not fully virialized at z ∼ 2.2. However, in a spherical collapse model, δ

g
is expected to grow to a linear matter enhancement of ∼1.9 by z = 0, exceeding the collapse threshold of 1.69, and leading to a fully collapsed and virialized Coma-type structure with a total mass of M
dyn(z = 0) ∼ 9.2 × 1014
M
⊙ by now. This observationally efficient confirmation suggests that large narrowband emission-line galaxy surveys, when combined with ancillary photometric data, can be used to effectively trace the large-scale structure and protoclusters at a time when they are mostly dominated by star-forming galaxies.
On the (Lack of) Evolution of the Stellar Mass Function of Massive Galaxies from z = 1.5 to 0.4
Authors: Kawinwanichakij Lalitwadee , Papovich Casey , Ciardullo Robin , Finkelstein Steven L. , Stevans Matthew L. , Wold Isak G. B. , Jogee Shardha , Sherman Sydney , Florez Jonathan , Gronwall Caryl
Published: March 2020

We study the evolution in the number density of galaxies at the highest stellar masses over the past ≈9 Gyr (

) using the Spitzer/HETDEX Exploratory Large-Area Survey (SHELA). SHELA includes complete imaging in eight photometric bands spanning 0.3–4.5 μm over 17.5 deg2 within the SDSS Stripe 82 field. The size of SHELA produces the lowest counting uncertainties and cosmic variance yet for massive galaxies at z ∼ 1.0. We study the evolution in the intrinsic stellar mass function (SMF) for galaxies with

using a forward-modeling method that takes into full account the statistical and systematic uncertainties on stellar mass. From z = 0.4 to 1.5, the evolution in the massive end of the intrinsic SMF shows minimal change in its shape: the characteristic mass (M*) evolves by less than 0.1 dex (±0.05 dex); furthermore, the number density of galaxies with

11 stays roughly constant at

(±0.05) from z = 1 to z = 0.4, consistent with no evolution, then declines to

 = −3.7 (±0.05) at z = 1.5. We discuss the uncertainties in the derived SMF, which are dominated by assumptions in the star formation history and details of stellar population synthesis models for stellar mass estimations. We also study the evolution in the SMF for samples of star-forming and quiescent galaxies selected by their specific star formation rate. For quiescent galaxies, the data are consistent with no (or slight) evolution (≲0.1 dex) in either the characteristic mass or number density from z ∼ 1.5 to the present even after accounting for the systematic uncertainty and the random error in the stellar mass measurement. The lack of number density evolution in the quiescent massive galaxy population means that any mass growth (presumably through “dry” mergers) must balance the rate of stellar mass losses owing to processes of late-stage stellar evolution and the formation of newly quiescent galaxies from the star-forming population. We provide an upper limit on this mass growth from z = 1.0 to 0.4 of ΔM
*/M
* = 45% (i.e., ≃0.16 dex) for quiescent galaxies more massive than 1011
M
⊙.
Effects of Orbital Eccentricity and IMF Cone Angle on the Dimensions of Mercury’s Magnetosphere
Authors: Zhong J. , Shue J.-H. , Wei Y. , Slavin J. A. , Zhang H. , Rong Z. J. , Chai L. H. , Wan W. X.
Published: March 2020

We investigate the influence of orbital eccentricity and interplanetary magnetic field (IMF) direction on the dimensions of Mercury’s magnetosphere using four Earth years of data collected by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging spacecraft. The variations in magnetopause subsolar distance, flank distance, and tail radius are compared to determine the global dimensions and compressibility of the magnetosphere. As Mercury moves from perihelion (aphelion) to aphelion (perihelion) its magnetosphere expands (contracts) globally by ∼15% on average. After mapping all of the magnetopause crossings to a fixed radial distance from the Sun, we find that IMF cone angle changes lead to reconfigurations of the magnetosphere of comparable magnitude to radial solar distance effects. Furthermore, the magnetosphere is found to expand globally under the quasi-radial IMF, while contracting under the quasi-perpendicular conditions. A new Mercury magnetopause model parameterized by the heliocentric distance and IMF cone angle was constructed. Unlike Earth, the model gives a closed magnetopause for the nightside in most cases, and its flaring decreases with the contraction of the magnetosphere. The results demonstrate the highly variable reconfigurations of Mercury’s magnetosphere under its extreme environmental conditions.
The Regulation of Galaxy Growth along the Size–Mass Relation by Star Formation, as Traced by Hα in KMOS3D Galaxies at 0.7 ≲ z ≲ 2.7*
Authors: Wilman David J. , Fossati Matteo , Mendel J. Trevor , Saglia Roberto , Wisnioski Emily , Wuyts Stijn , Schreiber Natascha Förster , Beifiori Alessandra , Bender Ralf , Belli Sirio , Übler Hannah , Lang Philipp , Chan Jeffrey C. C. , Davies Rebecca L. , Nelson Erica J. , Genzel Reinhard , Tacconi Linda J. , Galametz Audrey , Davies Richard I. , Lutz Dieter , Price Sedona , Burkert Andreas , Tadaki Ken-ichi , Herrera-Camus Rodrigo , Brammer Gabriel , Momcheva Ivelina , Dokkum Pieter van
Published: March 2020

We present half-light sizes measured from

emission tracing star formation in 281 star-forming galaxies from the

survey at

. Sizes are derived by fitting 2D exponential disk models, with bootstrap errors averaging 20%.

sizes are a median (mean) of 1.19 (1.26) times larger than those of the stellar continuum—which, due to radial dust gradients, places an upper limit on the growth in stellar size via star formation—with just

intrinsic scatter. At fixed continuum size the

size shows no residual trend with stellar mass, star formation rate, redshift, or morphology. The only significant residual trend is with the excess obscuration of

by dust, at fixed continuum obscuration. The scatter in continuum size at fixed stellar mass is likely driven by the scatter in halo spin parameters. The stability of the ratio of

size to continuum size demonstrates a high degree of stability in halo spin and in the transfer of angular momentum to the disk over a wide range of physical conditions and cosmic time. This may require local regulation by feedback processes. The implication of our results, as we demonstrate using a toy model, is that our upper limit on star-formation-driven growth is sufficient only to evolve star-forming galaxies approximately along the observed size–mass relation, consistent with the size growth of galaxies at constant cumulative comoving number density. To explain the observed evolution of the size–mass relation of star-forming disk galaxies, other processes, such as the preferential quenching of compact galaxies or galaxy mergers, may be required.
New defensive behaviour of the false coral snake Oxyrhopus rhombifer Duméril, Bibron & Duméril, 1854 (Serpentes, Dipsadidae) in south-eastern Brazil
Authors: Lopes de Assis Clodoaldo , José Magalhães Guedes Jhonny , Miriam Gomes de Jesus Letizia , Neves Feio Renato
Published: March 2020

Anti-predator mechanisms are essential for species survival and the description of defensive behaviour may improve our understanding about the ecology, biology and evolution of species. Herein, we describe new anti-predator behaviour for the False Coral Snake Oxyrhopus rhombifer in south-eastern Brazil, through direct observation of a juvenile specimen under laboratory settings. We recorded 10 types of defensive behaviour, seven of which are new records for this species and one of them (body vibration) is the first report for Brazilian snakes. Such behaviour may be explained by ontogeny or physical constraints. We highlight that O. rhombifer may be capable of recognising different threat levels imposed by predators and, accordingly, adjusting its defensive behaviour.
First host plant record for Pacarina (Hemiptera, Cicadidae)
Authors: Aiello Annette , Stucky Brian J.
Published: March 2020

Twenty-ninePacarina(Hemiptera: Cicadidae) adults, 12 males and 17 females, emerged from the soil of a pottedDracaena trifasciata(Asparagaceae) in Arraiján, Republic of Panama, providing the first rearing records and the first definitive host plant records for any species ofPacarina. These rearedPacarinaappear to be morphologically distinct from all known species ofPacarinaand likely represent an undescribed species. In light of this finding, we also discuss the taxonomy, biogeography, and ecology ofPacarina.
Iliopsoas Release in Hip Arthroscopy: Assessment of Muscle Atrophy
Authors: Patel Karan A. , Collins Mark S. , Cazan Brian A. , Krych Aaron J. , Levy Bruce A. , Hartigan David E.
Published: March 2020

Iliopsoas release is a common procedure for coxa saltans interna of the hip. The possible sequelae from this surgery have not been well studied. The purpose of this study was to determine postoperative atrophy and morphology of the cut tendon. This retrospective review included patients who underwent arthroscopic iliopsoas release and had magnetic resonance imaging of the ipsilateral hip before and after surgical intervention. Cross-sectional area measurements were obtained of the iliopsoas muscle at the level of the distal anterior inferior iliac spine as well as at the L5 vertebral pedicle in patients who had imaging that included the lower lumbar spine. Patient-reported outcomes included the modified Harris Hip Score (mHHS) and the Hip Outcome Score subscales for activities of daily living (HOS ADL) and sport (HOS Sport). A total of 44 patients met inclusion criteria for this study; 26 patients had additional advanced imaging that included the lumbar spine. The cross-sectional area of the iliopsoas at the level of the anterior inferior iliac spine decreased postoperatively by a mean of 191.4 mm
2
;, this difference was statistically significant (
P
<.0001). Mean area at the L5 pedicle was 628.9 mm
2
on the released side and 1216.2 mm
2
on the nonoperative side (
P
<.05). Mean Goutallier-Fuchs score of the released iliopsoas at the L5 pedicle was 1.3 (SD, 0.7). Mean mHHS, HOS ADL, and HOS Sport scores for patients at least 1 year postoperatively were 51, 56, and 42, respectively. [
Orthopedics
. 2020;43(3):e171–e176.]
Reducing the Data Rate in Internet of Things Applications by Using Wireless Sensor Network
Authors: Yahya Omar Hashim , Alrikabi Haider , Aljazaery Ibtisam A.
Published: March 2020

Du to the raising  number  of  using Internet of Things (I O T) for personal and commercial devices and applications, as well as the continues needs for improving the quality of the performance for the internet – connected devices enhance the researchers to investigate solutions for managing the data through the network Because of the fact that  the internet-connected devices needs addresses for each sensor node uses the IP-network and a large number of electronic modules is fabricated to be compatible with IPv4 only like NodeMcu, ESP8266, Arduino WIFI, and ESP32  with knowing that the IPv4 has a limited addresses number that will not be enough for the needs of  IOT developments, Many researchers turned to IPv6. In the  proposed system, another solution is suggested instead of the IPV6. The proposed idea is based on Non-IP Wireless Sensor Network (WSN) by connecting many sensing nodes to the sink-node that has an IP to forward the data to the server to be visualized in a web-portal. By this method, it is able to connect more than one node to the internet over only one IP, there for the data rate that are needed will be decreased. In addition, by using the non-IP network, the data rate and the power consuming by the sensor nodes have been reduced, the practical results are discussed for connecting four nodes over one IP4 and how it will reduce the data rate and the power consuming. In this work, the esp33 has been used as a Sink-node, and the wireless transceiver module( NRF24) has been utilized to transmit the data from nodes to esp32.
The Transformation of Education in the Hijaz, 1925–1945
Authors: Ochsenwald William
Published: March 2020

Centered on the development of government and private education in the urban centers of the Hijaz in the first twenty years of Saudi control, this article emphasizes the agency of teachers and administrators, the activities of private schools, the interaction of religion and secular subjects, and substantial educational reforms and expansion for male students. Saudi educators had to overcome the damages caused by World War I and Hashemite rule, limited economic and human resources, the linguistic diversity of students, and the impact of the Depression and World War II. Despite these problems the Saudi Hijaz witnessed improvements in the curriculum (including foreign language instruction), teacher training, administration, and funding. The changes involved some interaction with the Egyptian education system, but Saudi Arabia retained its independence in education policy matters.
L’écriture artiste des maîtres de ballet à propos des programmes du ballet pantomime
Authors: Vallejos Juan Ignacio
Published: March 2020

Le développement du ballet pantomime est fortement lié à une culture de l’écrit. Les programmes de ballet fonctionnent ainsi comme des outils d’intervention des maîtres de ballet dans l’espace public. Leur écriture incarne un projet artistique et social, lié à une revalorisation de l’art de la danse et du métier de maître de ballet. L’affirmation des nouvelles idées poétiques s’associe alors à des stratégies d’ascension sociale dans le contexte d’une redéfinition du prestige aristocratique.