bluuebunny/crossref_metadata_2025 huggingface dataset:
Service oriented Architecture for Agriculture System Integration with Ontology
Authors: Fahad Muhammad , Javid Tariq , Beenish Hira
Published: October 2022

Ontology is becoming a famous technique for converting unstructured data into meaningful data which acts as a key factor for decision-making, planning, and implementation in many areas, and agriculture is one of them. There are a lot of issues in agriculture practices e.g., farming, application of pesticides, and provision/ distribution of water to crops. However, some of the issues are critical and need to be resolved urgently to save cultivation from big hazards. In this paper, we have analyzed a few issues based on available literature. A variety of issues are faced in agriculture constantly and need to be resolved on an urgent basis. We have discussed the various ontology systems to acquire more precise results. Since ontology is based on a relation of data through which a user can get the maximum efficiency. Among all the challenges in agriculture, the lack of context-aware agriculture employs ontology with high concerns. This paper proposes a model to fill the gap in a service-oriented architecture.
IMU Aided GPS Based Navigation of Ackermann Steered Rover
Authors: ARSHAD MUHAMMAD SUFYAN , Hussain Ijlal , Maud Abdur Rahman , Maqsood Moazam
Published: October 2022

GPS signal loss is a major issue when the navigation system of rovers is based solely on GPS for outdoor navigation rendering the rover stuck in the mid of the road in case of signal loss. In this study, a low-cost IMU aided GPS-based navigation system for Ackermann Steered mobile robots is presented and tested to cater to the issue of GPS signal loss along. GPS path is selected and fed using the android application which provides real-time location tracking of the rover on the map embedded into the application. System utilizes Arduino along with the node MCU, compass, IMU, Rotary encoders, and an Ackermann steered rover. Controller processes the path file, compares its current position with the path coordinates and navigates using inertial sensor aided navigation algorithm, avoiding obstacles to reach its destination. IMU measures the distance traveled from each path point, and in case of signal loss, it makes the rover move for the remaining distance in the direction of destination point. Rover faced a sinusoidal motion due to the steering, so PID was implemented. The system was successfully tested on the IST premises and finds its application in the delivery trolley, institutional delivery carts, and related applications.
Development and Psychometric Properties of Adult Ostracism Scale
Authors: Riasat Nimra , Bnao Dr. Zaqia
Published: October 2022

The main objective of the current research was the development of the ostracism scale in the Urdu language to shed the light on this invisible harassment and abuse which is the most ignored part of society yet a very common method to exclude people from social groups. A total of 40 items developed through an adequate process with the help of William’s need and threat model. A sample of 200 participants in the age range of 18 to 40 years was selected for data collection through a simple random sampling technique. After analysis, the sample adequacy was 0.915 with 4 factors including self-esteem, control, meaningful existence and belonging which are the four fundamental needs of humans. CFA is .903 with the removal of 18 items in the scale and sample adequacy of the remaining 22 items of the scale is .924 with reliability of α = .937. 7 items subscale “self-esteem” reliability value is α = .866, 6 items subscale “control” reliability is 8.25, 5 items subscale “meaningful existence” reliability value is α = 844 and 4 items subscale “belonging” reliability value is α = .704. In Pakistani culture, it is very common to exclude someone without giving attention to the psychological factors the excluded person will face. This research will provide a direction to further research and awareness about ostracism which is rarely known by individuals but yet faces every day.
Anticardiolipin Antibodies in Women with Unexplained Infertility.
Authors: Radojčić L , Marjanović S , Vićovac L , Kataranovski M
Published: October 2022

Concept of autoimmune basis of infertility is still controversial, particularly regarding the presence of non-organ specific autoantibodies. Non-organ specific anticardiolipin (aCL) and antithyroglobulin (TgAt) antibodies were detected in infertile women. Both partners were evaluated according to the criteria of The American Society for Reproductive Medicine. All the results were normal in cases of unexplained infertility. Antisperm antibodies (ASA) were determined by a mixed antiglobulin reaction (MAR) and the Kibrick agglutination assay, aCL by commercial ELISA, TgAt by commercial RIA. Fertile women had children. Subjects were grouped in fertile (n=27), infertile (n=65), and cases of unexplained infertility (n=42). In fertile women, aCL was below the negative cut-off value (100 %), while women with unexplained infertility were positive in 23.8 %. Anticardiolipin (aCL) antibodies were detected in 21.5 % of infertile patients, most of them with unexplained infertility (15.4 %). Other positive women had partners with ASA (4.6 %), or exhibited a negative postcoital test (1.5 %). In this study aCL were not detected in women with ASA. TgAt incidence was increased in infertile (20 %) and unexplained infertility group (21.4 %) compared to the fertile controls (18.5 %). Increased incidence of aCL and TgAt in infertile women supports the contention that these autoantibodies contribute to the infertility
Effects of Perinatal Exposure to Hypoxia upon the Pulmonary Circulation of the Adult Rat.
Authors: Jones RD , Morice AH , Emery CJ
Published: October 2022

The hypothesis on Fetal and Infant Origins of Adult Disease proposes that an altered in utero environment may impair fetal development and physiological function, increasing susceptibility to disease in adulthood. Previous studies demonstrated that reduced fetal growth predisposes to adult cardiovascular diseases. Maternal smoking and high altitude are also linked to reduced fetal growth and adult disease, and both cause fetal hypoxia. We therefore wanted to determine whether fetal hypoxia produces alterations in the adult pulmonary vasculature. Body and ventricular weight, pulmonary arterial compliance and vasoreactivity to potassium chloride (KCl), prostaglandin F2alpha (PGF2alpha), acetylcholine (ACh) and sodium nitroprusside (SNP) were studied in adult rats exposed to 10 % hypoxia throughout the perinatal period, compared to age-matched controls. Rats exposed to perinatal hypoxia had reduced body weight (199+/-15 vs. 294+/-10 g, P<0.001), elevated right ventricular weight (70.3+/-8.8 vs. 51.4+/-1.2 mg/100 g, P<0.05), elevated left ventricular weight (281+/-27 vs. 232+/-5 mg/100 g, P<0.05), reduced pulmonary arterial compliance (35.2+/-2.0 vs. 46.4+/-2.4 microm/mN, P<0.05) and reduced maximal pulmonary vasoconstriction to KCl (1.74+/-0.14 vs. 2.63+/-0.31 mN/mm, P<0.01), and PGF2(2alpha) (1.40+/-0.14 vs. 2.47+/-0.44 mN/mm, P<0.05). Perinatal exposure to hypoxia had a profound effect upon the adult pulmonary circulation, which could predispose to cardiopulmonary diseases in adulthood.
Triiodothyronine Deiodinating Activity in Brown Adipose Tissue after Short Cold Stimulation Test in Trained and Untrained Rats.
Authors: Sullo A , Brizzi G , Maffulli N
Published: October 2022

Interscapular brown adipose tissue (IBAT) activity is controlled by sympathetic nervous system, and factors that influence thermogenesis appear to be centrally connected to the sympathetic outflow to IBAT. Cold exposure produces a rise in BAT temperature, which is associated with an increased thyroid activity, elevated serum levels of 3,5,3'-triiodothyronine (T3), and an increased rate of T3 production. This study evaluated the effect of swimming training on 5'-triiodothyronine deiodinase (5'-D) activity in IBAT under normal environmental conditions and after short (30 min) cold exposure (TST stimulation test). 5'-D activity is lower in trained rats at basal condition, and TST increases 5'-D in IBAT of both untrained and trained rats. However, this increase is lower in trained rats. Training reduces the deiodinating activity in normal environmental conditions as well as after short cold exposure. Probably, other compensatory mechanisms of heat production are active in trained rodents.
İş Dünyası ve İnsan Hakları: Zorunlu İnsan Hakları Durum Tespit Yükümlülükleri
Authors: TARMAN Zeynep Derya
Published: October 2022

Bu çalışmada çok uluslu şirketlerin ticari faaliyetlerinin sebep olabileceği insan hakları ihlallerinin ve çevresel tahribatın engellenmesi amacına hizmet eden insan hakları durum tespit yükümlülükleri incelenmiştir. Bu çerçevede, Birleşmiş Milletler ve Avrupa Birliği bünyesinde olmak üzere uluslararası alandaki gelişmeler ele alınmış, ardından ülkesel düzenlemelere yer verilmiştir. Ülkesel düzenlemeler bakımından Türkiye ile olan ihracat hacimleri göz önünde bulundurularak Almanya, İngiltere, Fransa ve Hollanda’daki iş dünyası ve insan hakları durum tespit yükümlülükleri kapsamında yaşanan gelişmeler incelenmiştir. Son olarak, Türk hukukundaki durum ve söz konusu gelişmelerin özellikle Türkiye’de yerleşik şirketler üzerindeki etkileri değerlendirilmiştir.
Kadının Beyanı Esastır İlkesi ve Bağlamsallık
Authors: KARACAN Olcay
Published: October 2022

Kadının beyanı esastır ilkesi cinsel suçların soruşturulması ve kovuşturulması aşamalarından itibaren yargılama süreçlerinde kadınların söylediklerinin ciddiye alınıp onlara özen gösterilmesini şart koşmaktadır. Hatta kimi durumlarda bu ilkeden hareketle cinsel suçlarla ilgili hüküm verilirken kadının beyanının tek başına kanıt olarak kabul edilmesi de talep edilmektedir. Yargıtay da dâhil olmak üzere mahkemeler olayın bağlamına bakarak şüpheden sanık yararlanır ilkesine rağmen bazı ölçütlerden hareketle kadının beyanının tek başına kanıt olarak kabul edebilmektedir. Ancak Yargıtay tarafından getirilen bu ölçütler toplumca makbul kabul edilen kadınların beyanlarının ciddiye alınmasına dayalı olduğu için cinsel suçlar bakından kadınlar arasında iffetli iffetsiz ayrımı başta olmak üzere bazı ayrımların yapılmasına zemin hazırlamaktadır. Oysa hukuki akıl yürütmede bağlama duyarlı yaklaşım ister toplumca makbul kabul edilen ister edilmeyen kadınlarla ilgili olsun, her tek durumun cinsiyetçi önyargıların ve kişisel tutumları bir yana bırakmayı gerektirdiği kadar her tek durumun kadının beyanı esastır, şüpheden sanık yararlanır gibi ilkeleri de gözeterek değerlendirmeyi gerektirir. Zaten ilkeler değerlendirme yaparken bağlamın dikkate almasının engellenmesi için oluşturulmuş değildir. Aksine İlkeler ilgilenilen durumun özellikleri değerlendirirken nelerin dikkate değer kabul edileceği, nelere odaklanılacağı hususunda yol göstermektedirler. Dolayısıyla cinsel suçlar bakımından kadının beyanı esastır ilkesi bağlamın değerlendirilmesinde kadınlara yargılama süreçleri boyunca özen gösterilmesini gerektirse de kadının beyanının tek başına kanıt olarak kabul edilip faile ceza verilmesini zorunlu kılmamaktadır.
Muvazaa Sebebiyle Tasarrufun İptali Davası
Authors: ATASOY TANRIKULU Umare
Published: October 2022

İcra takiplerinde borçlunun, takip başlatılmadan önce veya takip başlatıldıktan sonra, ancak hacizden önce elinden çıkarttığı malvarlıkları bakımından, bu tasarruflarını sınırlandıracak herhangi bir kısıtlama bulunmamaktadır. Bununla birlikte; alacaklının, borçluya karşı yapmış olduğu icra takibinin, alacağına kavuşamayarak sonuçsuz kalması ve başarısızlığa uğramasıyla, alacaklıya İİK m.277 vd. hükümleri uyarınca borçlunun elinden çıkarmış olduğu malvarlıkları bakımından iptal davası açma hakkı tanınmıştır.
Alacaklı, kendisinden mal kaçırmak isteyen kötü niyetli borçlunun elinden çıkardığı malvarlıkları için İİK m.277 vd. hükümlerine göre tasarrufun iptali davası açabileceği gibi, gerçekleştirilen tasarrufun muvazaalı olarak yapıldığını ispatlayarak TBK m.19 hükmüne göre de işlemin hükümsüzlüğünü isteyebilir.
Üzerinde birçok tartışmanın yapıldığı bu iki dava, hizmet ettikleri amaç aynı olsa da nitelikleri ve kötüniyetli borçluya olan yaptırımları birbirinden çok farklı olan iki davadır. Bu sebeple, kanunda yaptırımı hükümsüzlük olan muvazaa kurumuna, İİK m.227 vd. maddelerinde düzenlenen iptal kurumunun hükümlerini uygulamak, birbirinden çok farklı olan iki davayı birleştirip karıştırmak, kanunen alt yapısı olmayan yeni bir dava türü yaratmak olacaktır.
İslam ve Klasik Dönem Osmanlı Hukukunda Nesep İkrarı
Authors: KURTOĞLU Yasemin
Published: October 2022

Korunmasına ve sağlıklı yürütülmesine her daim önem verilmiş olan nesep, kişilerin üst soylarıyla bağlantısını ifade eden bir kavram olarak karşımıza çıkmaktadır. İslam hukuku, anne ile nesep ilişkisinin kurulmasını doğum gibi biyolojik bir olaya bağlamışken; baba ile nesep ilişkisinin kurulmasını ise anne ile evli olma yahut annenin babanın cariyesi olması gibi çeşitli hukuki şartlara tabii kılmıştır. Nesep ilişkisinin kurulmasına yönelik getirilen bu sınırlamalar, bazı durumlarda gerçeklere uygun bir nesep bağının oluşmasına engel oluşturmuştur. Diğer taraftan, kaybolmuş yahut bulunmuş çocukların da anne ve babalarının kim olduğu bilinmediğinden neseplerinin kurulması mümkün olamamıştır. İşte bu gibi durumlarda nesep ikrarı yoluna gidilebileceği kabul edilmiş ve bu sayede kişilerin kendi irade beyanlarıyla nesep ilişkilerinin kurulmasına imkan tanınmıştır. Nesep ikrarına başvurabilmek için de çeşitli şartlar öngörülmüştür. Bunlar bir yandan bu kurumun gerçeklere aykırı olacak şekilde kullanılmasını engellemeye yönelik olduğu gibi bir yandan da hali hazırda nesebi bulunan yahut da zina sonucu dünyaya geldiği bilinen kimselerin nesebinin kurulmasını engelleyerek toplumsal düzenin korunmasını sağlamaya yönelik şartlardır. Çalışmada, İslam ve Osmanlı hukukunda nesep ve nesebin kurulması yolları hakkında bilgi verildikten sonra nesep ikrarı konusuna geçilmiş ve bu kurum; nedenleri, şartları, hüküm ve sonuçlarıyla birlikte detaylıca incelenmeye çalışılmıştır.
Mirasçıların Tereke Borçlarından Sorumluluğu Bağlamında Mirasbırakanın Kefalet Borcundan Sınırlı Sorumluluk
Authors: TURAN BAŞARA Gamze
Published: October 2022

Türk Medeni Kanunu’nun (TMK) 599. maddesinde benimsenen “küllî halefiyet prensibi” uyarınca mirasçılar, mirasbırakanın ölümü ile birlikte mirası bir bütün olarak ve kanun gereğince kazanırlar. Mirasbırakanın ölümüyle birlikte, miras yolu ile intikali mümkün olan tüm haklar ve aynı zamanda borçlar herhangi bir işleme gerek kalmaksızın, bir bütün olarak mirasçılara geçer. Mirasçılar, mirasbırakanın intikale elverişli tüm borçlarından, kural olarak kendilerine intikal eden terekeyle sınırlı olmaksızın kişisel malvarlıklarıyla ve müteselsilen sorumlu olurlar.

Mirasçıların, mirasbırakanın borçlarından müteselsilen ve tüm malvarlıklarıyla şahsen sorumlu olmaları, alacaklıların menfaatini korurken, dış ilişkide alacaklıya karşı borcun tamamından sorumlu olan mirasçı için ekonomik açıdan ciddi tehdit oluşturabilmektedir. Bu durumu dikkate alan kanun koyucu, müteselsil ve şahsi sorumluluk karşısında mirasçıları korumaya yönelik bir takım düzenlemelere yer vermiştir. Bunlardan biri, terekenin resmi defterinin tutulması halinde deftere kaydolunan kefalet borcundan mirasçıların sorumluluğunu sınırlandıran 630. maddede hükmüdür.
Mirasçıların mirasbırakanın kefalet borcundan sorumluluğunu sınırlandıran TMK’nın 630. maddesine göre, mirasın resmi defterinin tutulmasının talep edildiği ve mirasın tutulan deftere göre kabul edildiği durumda mirasçılar, mirasbırakanın kefalet borcunun tamamından değil, terekenin iflas hükümlerine göre tasfiyesi halinde kefalet alacaklısına düşecek miktarla sınırlı olmak üzere bütün malvarlıklarıyla sorumlu olacaklardır.
The Effect of GABA on the Gut Microbiota During Metabolic Stress
Authors: Gurman Yu. V. , Tropskaya N. S. , Chernen'kaya T. V. , Popova T. S.
Published: October 2022

The effect of gamma-aminobutyric acid (GABA) on the gut microbiota was evaluated in experiments on 47 rats with metabolic stress (MS) induced by food deprivation. MS was found to be associated with changes in the qualitative and quantitative composition of the caecum microbiota, including the redistribution of opportunistic flora, the growth of pathogenic microorganisms, as well as a decreased number of lactobacilli and bifidobacteria. Daily administration of GABA at a dose of 70 mg/kg during MS led to a decrease in the number of pathogens, thus leading to the restoration of normal eubionts in the cecum.
Preparation of Bacterial Recombinant Myostatin to Induce the Synthesis of Myostatin-Specific Autoantibodies
Authors: Koloskova E. M. , Ezerskiy V. A. , Zhukova O. B.
Published: October 2022

The myostatin protein, belonging to the family of growth factors, represents a potential target for therapeutic effects in muscular system pathologies. However, this protein is characterized by other beneficial properties. Polymorphisms of the myostatin gene associated with the restriction of its functional activity are useful as genetic markers of meat productivity in farm animals. Blocking the action of myostatin in productive animals can be achieved by inducing the synthesis of specific autoantibodies using recombinant myostatin, possessing sufficient immunogenicity against myostatin as an antigen. A genetic construct was created and an E. coli producer strain with a high level of expression of recombinant myostatin was obtained.
Analysis of annexin V levels and cytokine status in patients with acute myocardial infarction
Authors: Naumov A. V. , Prokofieva T. V. , Polunina O. S. , Saroyants L. V.
Published: October 2022

Aim. Study of annexin V levels and cytokine status in patients with acute myocardial infarction.   Materials and methods. We examined 27 patients with Q-forming myocardial infarction who were admitted 12–24 hours after the development of the clinic, and 20 individuals in the control group. The lipid spectrum was determined using an automatic analyzer Humalizer-3000 (Human, Germany). Immunological studies were performed on a flow cytofluorimeter Navios (Beckman Coulter, USA). Lymphocyte subpopulations were evaluated using monoclonal antibodies produced by Immunotech (Coulter Corporation, USA). A set of ANNEXIN V-FITC/7 AAD (Beckman Coulter, USA) was used to isolate cells that had undergone apoptosis. Isolation of peripheral blood mononuclears was performed by centrifugation on a density gradient Ficol-hypac (Pharmacia Fine Chemicals, Sweden), interleukin-1β was determined using the Vector-Best test system (Vector-Best, Russia), and the tumor necrosis factor was determined using the RayBio Human TNF-alpha ELISA Kit (USA). Statistical data processing was performed using the program package Statistica 10.0.   Results. In patients with acute myocardial infarction on the background of dyslipidemia (total cholesterol and LDL cholesterol increased, cholesterol-HDL reduced) showed a significant decrease in the total number of T-lymphocytes (СD 3+) (p < 0.05), T-suppressor (СD 8+) (p < 0.01), B-cells number (СD 19+) and the ratio of CD 4+/CD 8+ lymphocytes increased (p < 0.05). In patients with myocardial infarction there was a significant increase of apoptotic cells and рro-inflammatory cytokines involved in apoptosis (IL-1β and TNF-α) in the blood compared with the control.   Conclusion. Increased spontaneous apoptosis of peripheral blood lymphocytes in patients with acute myocardial infarction indicates the systemic nature of apoptosis in acute coronary pathology, due to increased annexin-dependent apoptosis of T-lymphocytes as a result of immune disorders, which leads to activation of the cytokine system with an increased concentration of рro-inflammatory mediators (TNF-α, IL-1β). The identified dependencies require further study with the prospect of developing predictive algorithms for myocardial infarction outcomes based on indicators of annexin V and pro-inflammatory cytokines.
Measurement uncertainty estimation technology: justification, conditions and experience of implementation in medical practice
Authors: Kovyazina N. A . , Alkhutova N. A . , Chunovkina A. G. , Emanuel V. L.
Published: October 2022

In accordance with GOST R ISO 15189–2015 ‘Medical laboratories. Particular requirements for quality and competence’ for the report on the values of the measured value in the patient’s samples, the laboratory must determine and use the measurement uncertainty in the analytical phase. The article discusses in detail the differences between the general analytical error and measurement uncertainty. The authors have tested a typical algorithm for estimating measurement uncertainty. Mandatory conditions and an algorithm for calculating measurement uncertainty (at the analytical stage) in medical laboratories using quantitative immunochemiluminescence analysis are presented.
One-stage dental implantation without orthopedic loads – histological and radiographic control of survival
Authors: Studenikin R. V. , Filin A. A. , Mamedov A. A. , Niftaliev K. S.
Published: October 2022

Purpose: histological and radiographic study and comparison of osseointegration and stability of implants without orthopedic load, installed in different ways (simultaneously in a fresh socket immediately after tooth extraction and in mature bone).

Materials and methods: the criterion for inclusion in the study was the possibility of placing a test (immediately after tooth extraction) and a control implant (in mature bone) on opposite sites without the use of osteoplastic materials or membranes. The procedures were followed by periapical radiography, which was repeated three months later. According to the comparative data of the images, the marginal loss of bone tissue was calculated. Both implants were removed to obtain histological specimens. Sections were prepared by standard staining with hematoxylin and eosin. Using an X-ray digitizer, the percentage of implant-to-bone connection was calculated.

Results: the data of histological and radiographic studies showed no significant difference in the osseointegration of the implant in the post-extraction lenok and in the mature bone. There was no statistically significant difference in the percentage of bone connection between test and control implants placed in different jaws. Connective tissue in implants is absent, as well as fibrous. Bone destruction was not observed in histological sections.

Conclusions: jsseointegration and survival of dental implants without orthopedic load, installed without the use of osteoplastic materials in a fresh post-extraction hole and in a mature bone is almost the same, regardless of the place of installation (upper or lower jaw).
Features of oral care in the treatment of periodontitis in patients who have undergone a new coronavirus infection COVID-19
Authors: Malyshev M. E. , Shvetsov M. M. , Iordanishvili A. K.
Published: October 2022

A new coronavirus infection (COVID-19) leads to changes in the oral cavity, which makes it important to consider the optimal use of oral care products. The aim of the work was to evaluate the effectiveness of the use of preventive toothpastes with herbal components, along with the use of antiseptic rinses, in the treatment of elderly patients suffering from chronic generalized periodontitis and against the background of postcovid syndrome. 48 elderly patients with postcovid syndrome suffering from chronic generalized periodontitis of moderate severity were examined, who underwent the generally accepted complex treatment of periodontitis, but the methods of individual oral care differed due to the inclusion of rinses to the toothpastes used in the technique. It has been established that in elderly people suffering from periodontitis against the background of a new coronavirus infection, there are large violations of hemomicrocirculation in periodontal tissues, as well as a high incidence of periodontal pathogens. It was also noted that toothpastes in combination with mouthwashers are highly effective for individual oral hygiene in such patients. Despite the relatively identical clinical characteristics of oral hygiene and indicators of the condition of periodontal tissues, the use of a rinse aid with chlorhexidine during the week at the beginning of complex treatment helps to reduce the frequency of detection of periodontal pathogens, which is important for the secondary prevention of periodontitis and its recurrence.
Methods of determining the electrochemical potentials of metal structures in the oral cavity
Authors: Volkov A. G. , Dikopova N. Zh. , Amanatidi G. E. , Arzukanyan A. V. , Volkov N. A. , Nikolskaya I. A.
Published: October 2022

Galvanic phenomena in the oral cavity are associated with the presence in the oral cavity of metal structures and inclusions of dissimilar metals (crowns, implants, inlays, pins). These phenomena can occur in the vast majority of dental patients. The review article analyzes the literature on galvanic processes in the oral cavity, methods for their diagnosis, and also touches upon the issues of terminology in describing galvanic processes in the oral cavity. Methods for determining the electrochemical potentials of metal structures and inclusions in the mouth and their diagnostic value are considered in a comparative manner in terms of theoretical and physical aspects of their advantages and disadvantages for practical use in the clinic. The necessity of developing a unified method for determining the electrochemical potentials of metal structures and inclusions located in the oral cavity, its theoretical basis and clinical approbation in order to improve the efficiency of diagnosis of galvanic syndrome in patients with a dental profile is substantiated.
Influence of post-covid hemodynamic disorders on postoperative wound healing process in the maxillofacial region by laser doppler flowmetry
Authors: Grigoreva T. S. , Bezrukov S. G. , Kaladze K. N.
Published: October 2022

Postoperative wound healing is known to depend on the duration and intensity of local inflammatory and restorative responses. It has been established that the course of the wound process is significantly affected by immunodeficiency states caused by previous diseases, including COVID-19. The article presents an analysis of the results of the study of the active components of microvasculature regulation obtained by laser doppler flowmetry in surgical dental patients after surgical treatment tumor-like formations (epidermoid cysts, atheromas) of the soft tissues of the maxillofacial region. The study was performed at the 1st, 7th and 30th days, as well as at 6 and 12 months after surgery. 98 patients were included in equal groups. Representatives of the main group have a history of COVID-19. It was established that against the background of a surgical wound, the post-covid condition contributes to a significant violation of the functioning of the endothelium of the vascular wall, which is confirmed by significant differences in the decrease in the amplitude of endothelial rhythms in the comparison groups from the first day of the postoperative period. At the same time, a significant increase in the amplitude of myogenic rhythms (Am) on the first day of postoperative LDF-metry in patients in the main group, in comparison with the control (31.67 perf. units versus 23.13 perf. units, respectively), should be interpreted not only as a reaction to surgical injury, but also as a result of long-term complications associated with SARS-CoV-2 virus.

Thus, the obtained results give reason to conclude that in surgical dental patients who have a history of COVID-19, the active mechanisms of regulation of the peripheral microvasculature (amplitudes of myogenic and endothelial rhythms) are less stable and, accordingly, are subject to imbalances and pronounced dysfunctions, the correction of which takes a longer time (in comparison with the control). In this regard, patients of the main group need additional perioperative therapy with subsequent rehabilitation.
Effectiveness of Active Flow Control Techniques in an Advanced S-Shaped Engine Intake
Authors:   Institute of Jet Propulsion Bundeswehr University Munich, Max Philipp , Stößel Marcel ,   Institute of Jet Propulsion Bundeswehr University Munich, Krummenauer Michael ,   Bundeswehr Technical Centre for Aircraft and Aeronautical Equipment, Niehuis Reinhard ,   Institute of Jet Propulsion Bundeswehr University Munich
Published: October 2022

The development of modern military aircraft has to meet considerable requirements in terms of reducing the system weight, installation space, as well as radar signature. For fighter aircraft, serpentine intakes are commonly used since they reduce the radar visibility of the engine, the system weight, and allow the optimal use of the installation space. However, these intake systems cause flow disturbances for the engine. To avoid penalties in engine performance, active flow control methods can be implemented for controlling the flow through the intake. The experiments undertaken at the Institute of Jet Propulsion (ISA) at the Bundeswehr University Munich used a scaled model of a compact double s-shaped intake duct with flow control techniques utilizing air injection and suction for boundary layer control and separation suppression. Detailed total pressure measurements with a Kiel probe rake at the exit plane of the duct show the effectiveness of the individual flow control mechanisms. Suction is applied at three different locations. For each configuration, the suction port diameter and mass flow rate are varied. For tests with injection, air is blown into the intake duct through a Coanda nozzle at two specific positions. The Coanda nozzle slot width and the number of slots were varied. The results demonstrate which parameters must be set to effectively influence the flow and achieve favorable distortion parameters at the intake duct’s outlet.
A FLUID-THERMAL ANALYSIS OF PARTIAL ADMISSION AXIAL TURBINES
Authors: Wang Hanwei , Luo Kai , Yang Qiushi , Huang Chuang , Qin Kan
Published: October 2022

The partial admission axial turbines operate with the extreme pressure, temperature, and rotational speed for underwater applications. The thermal stress and mechanical stress need to be carefully examined to avoid the operation failure. In this paper, a two-way weakly fluid-thermal analysis is performed to attain the rotor disk temperature distribution. The fluid simulation is performed by solving the three-dimensional Reynolds averaged Navier-Stokes equations coupled with k-omega SST turbulence model, while the thermal analysis is conducted using the finite element method. The mixing plane method is applied when transferring the temperature due to the partial admission configuration. Once the steady state temperature distribution is achieved, the pressure distribution and centrifugal forces are also applied as the aerodynamic and mechanical loads. The corresponding stress and deformation are subsequently obtained. The results show that the maximum stress at the operating point exceeds the allowable material stress, indicating a proper cooling strategy is needed for future investigations.
Optimum cooling performance of a multiple-jets impingement cooling system by controlling the inlet flow condition
Authors:   School of Energy and Power Engineering, Beihang University, Meng Long , Li Haiwang ,   School of Energy and Power Engineering, Beihang University, Gang Xie ,   School of Energy and Power Engineering, Beihang University, Zhou Zhiyu ,   School of Energy and Power Engineering, Beihang University
Published: October 2022

Optimizing the heat-transfer distribution of the jet-impingement cooling on a target plate is essential to solve the local hot-spot problem in the turbine blade. In this study, a novel method is proposed to control and optimize the cooling performance of a multiple-jets impingement system by using a fin on the internal wall of the cooling channel. The flow field in the cooling channel can be controlled by the fin, resulting in the change of cooling performance for jet impingement without modifying other structures. Using the shear stress transport (SST) k–ω turbulence model, numerical studies on the fluid flow and heat transfer of the fin-affected jet-impingement system are conducted. The results show that the rectangular fin can influence the flow field in the cooling channel, affect the jet impingement's speed and direction, and change the heat transfer distribution on the target plate. Simultaneously, the influence of the parameters, fin length (L), fin height (H), fin position (S), are analysed in this study. The results can provide a reference for matching the position of the fin and jet-holes in the cooling channel.
THE INFLUENCE OF BACK PRESSURE CHANGE ON THE LEAKAGE FLOW CHARACTERISTICS OF THE LAST STAGE BLADE TIP CLEARANCE OF STEAM TURBINE
Authors:   Department of Power Engineering, North China Electric Power University, Yuan Yunyun , Han* Xu ,   Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Li Peng ,   Department of Power Engineering, North China Electric Power University, Han Zhonghe ,   Department of Power Engineering, North China Electric Power University
Published: October 2022

It is of great significance to fully understand the tip clearance leakage flow of rotor blades for improving the working efficiency of steam turbines. Taking the last stage of low pressure cylinder of a 600MW steam turbine as the research object, the tip clearance leakage flow of rotor blade under different outlet pressure was numerically simulated. The flow field characteristics and the influence of outlet pressure on the leakage flow were analyzed. The results show that there is obvious separation flow on the pressure surface and suction surface. On the pressure surface, with the increase of outlet pressure, the position of separation fluid gradually moves down. The positions of separation fluid in working conditions 1, 2 and 3 are 65%, 50% and 15%, respectively. In case 3, a small reflux vortex appears at the root of the pressure surface. On the suction side, there is an obvious separation vortex in case 1. In case 2 and 3, it can be clearly seen that the lower passage vortex is formed at the blade root. It is opposite to the separation fluid rotation direction, and the influence range increases with the increase of outlet pressure. At the same time, with the increase of outlet pressure, the pressure difference on both sides of the blade decreases, and the blocking effect of leakage flow on the main flow is weakened. When the outlet pressure is 15kPa, there is backflow at the top of rotor blade. It interacts with leakage flow and main flow to further increase the loss. The research has a certain reference value for the optimization of flow structure of steam turbine.
EFFECTS OF FILM HOLE DIAMETER AND WALL THICKNESS ON OVERALL COOLING EFFECTIVENESS OF TURBINE VANE LEADING EDGE
Authors:   Northwestern Polytechnical University, Wang Rui , Liu Cun-liang ,   Northwestern Polytechnical University, Chen Qi-hao ,   Northwestern Polytechnical University, Meng Xian-long ,   Northwestern Polytechnical University
Published: October 2022

The overall cooling effectiveness(ϕ) is used to provide the actual temperature on the surface of the turbine vane, which is measured using IR thermography with high resolution and dynamic range in current study. The effects of geometrical parameters of turbine vane leading edge on ϕ _are experimentally and numerically investigated. Three specimens of turbine vanes are investigated including two wall thicknesses (2.28mm,5.7mm) and two film cooling hole diameters (0.95mm,0.66mm). In addition, the total areas of the film holes outlets for specimens are the same to ensure similar flow resistance characteristics. The experiments are modelled in a low-temperature state(Tg=583K, Tc=293K). The mainstream Reynold number (Reg) is 165,000, and four typical mass flow ratios (MFR) are designed, 0.35%, 0.52%, 0.69% and 1.02%. Results show that: the hole diameter plays a pivotal role on ϕ _distirbution. Two vanes with smaller diameter of film hole have higer overall cooling effectiveness than the model with larger diameter at all MFR conditions. The ϕ _distributions are nonhomogeneous along the streamwise and lateral direction, especially at low MFR conditions for three vanes. This is mainly caused by the uneven coolant flow distribution at low MFR. However, the ϕ _distribution will be more uniform as the MFR increases due to the denser coolant outflow at each hole row. Furthermore, the influence of wall thicknesses on ϕ _is different as MFR increases from 0.35% to 1.02%, and the ϕ _of thicker wall model has a greater increase.
INFLUENCES OF DEPTH AND RIM WIDTH OF SQUEALER TIP ON THE LEAKAGE FLOW AND HEAT TRANSFER
Authors:   Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Huang Tong , Li Hui ,   Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Su Xinrong ,   Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Yuan Xin ,   Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University
Published: October 2022

Blade tip structure effects the strength of tip leakage flow and the intensity of heat transfer, which is caused by tip clearance between blade tip and shroud in turbine. To weaken the tip leakage flow, squealer tip which is mainly controlled by squealer rim width and height, has been studied in academia and industry. Several cases were calculated in this work, including four different squealer rim width and four different squealer rim height for each width. Means of solving Reynolds-averaged N-S equations in conjunction with SST turbulence model was used. The result shows that the increase of squealer rim height can reduce the tip leakage loss, while the increase of squealer rim width makes more tip leakage loss. Meanwhile, three high thermal transport areas on the blade tip surface need attention.
EFFECTS OF LOCAL BLOCKAGE ON FILM COOLING EFFECTIVENESS OF A FAN-SHAPED HOLE FED BY CROSSFLOW
Authors:   University of Shanghai for Science and Technology, Pengmin L , Xiaofeng C ,   University of Shanghai for Science and Technology, Chixiang L ,   University of Shanghai for Science and Technology, Ren D ,   University of Shanghai for Science and Technology
Published: October 2022

Effects of local blockage in the hole on film cooling effectiveness were investigated. The film cooling effectiveness (FCE) and heat transfer coefficient (HTC) of a fan-shaped hole was measured on a test rig of a flat plate with secondary crossflow in the coolant feeding passage. The blowing ratio was varied from 1 to 2 with a crossflow-to-mainstream momentum ratio of 0.4 and a blocking ratio of the hole was 25%. Results have revealed the difference of blockage effects at different locations. The blockage at the entrance side (Entr-side) and expansion side (Exp-side) walls concentrate the jet stream on one side, thus reducing the FCE values. Blockage on the laidback wall (Exp-back)slows down coolant velocity, leading to an accelerated dissipation of the film layer. The FCE values decrease as the blowing ratio is raised in the Entrside case. The Blockage of Entr-side and Exp-back increased the heat transfer coefficient compared to the no blockage condition(clean), but the blockage on the diffuser side wall reduced the heat transfer coefficient compared to the clean condition. The heat transfer coefficient ratio of all holes increases with the increase of the blowing ratio. Results are indicative to evaluate the performance uncertainty of a fan-shaped hole in a real operating environment.
AERODYNAMIC ROTOR BLADE DESIGN FOR SMALL WIND TURBINES WITH FOCUS ON TURBULENT INFLOW CONDITIONS
Authors:   ForWind Center of Wind Energy Research Institute of Turbomachinery and Fluid Dynamics Leibniz Universität Hannover, Schmid Matthias , Seume Joerg R. ,   ForWind Center of Wind Energy Research Institute of Turbomachinery and Fluid Dynamics Leibniz Universität Hannover
Published: October 2022

Small wind turbines often have to operate in slow and highly turbulent wind. Whereas the aerodynamic design of rotor blades for small wind turbines is mostly based on tools and methods developed for large wind turbines, these aerodynamic requirements distinguish small wind turbines from larger models significantly. Nonetheless, steady blade element momentum (BEM) theory is employed to calculate the rotor aerodynamics, since this theory delivers reasonable results within a fast calculation time. Usually, steady state simulations which require much less computational effort than unsteady simulations tend to be preferred during the iterative design process of new rotor blades. This paper explores the worthiness of using computationally taxing unsteady flow simulations for determining the optimum rotor blade shape. A differential evolution algorithm in combination with an unsteady blade element momentum model is applied to derive an optimised blade shape for a small horizontalaxis wind turbine under turbulent inflow conditions. The results of this paper present, compared to steady optimisation, the effect of turbulent inflow on the optimum aerodynamic rotor blade shape and the rotor performance of a small wind turbine.
INFLUENCE OF HONEYCOMB STRUCTURES ON LABYRINTH SEAL AERODYNAMICS
Authors:   Institute of Turbomachinery and Fluid Dynamics Leibniz Universität Hannover, Oettinger Marcel , Kluge Tim ,   Institute of Turbomachinery and Fluid Dynamics Leibniz Universität Hannover, Seume Joerg R. ,   Institute of Turbomachinery and Fluid Dynamics Leibniz Universität Hannover
Published: October 2022

Shroud cavities in aero engines are typically formed by a labyrinth seal between the rotating turbine blade and the stationary casing wall. To mitigate rub-in and reduce weight, the casing often features honeycomb structures above the rotor seal fins. In this paper, the aerodynamic performance of such honeycomb structures is experimentally investigated using a rotating test rig featuring both smooth and honeycomb-tapered casing walls. Measurements show that the discharge coefficient decreases for the honeycomb configuration while losses and subsequent windage heating of the flow increase. A variation in rotational speed reveals additional sensitivities to the local flow field in the swirl chamber. Numerical simulations are conducted and validated using the experiments. A good agreement between the prediction and measurements of the jet via the evolution of pressure across the sealing fins is identified. In contrast, the prediction of losses and integral parameters reveals larger deficits. Empirical correlations from available literature satisfactorily predict the leakage mass flow rate if rotation is low and if the casing is smooth. High rotation and the presence of honeycombs, however, prove challenging and reveal the potential for further improvements.
LARGE EDDY SIMULATION OF TRANSONIC FILM COOLING WITH INJECTION THROUGH CYLINDRICAL ORIFICES INCLUDING SHOCKFLOW INTERACTION
Authors:   （Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Key Laboratory of CO2 Utilization and Reduction Technology, Guo Hao , Jiang Peixue ,   （Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Key Laboratory of CO2 Utilization and Reduction Technology, Zhu* Yinhai ,   （Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Key Laboratory of CO2 Utilization and Reduction Technology
Published: October 2022

Laminar air coolant injected into a fully turbulent preliminary stream is analyzed using Large Eddy Simulation. Three freestream Mach numbers, 0.8, 1.2 and 1.4, are investigated. Regions of typical shock-flow interaction in supersonic film cooling are distinguished into 3 types, including shock generation, shock reflection and shock absorption. Numerical results show that the separation/bow shock promote the secondary flow to adhere to the protected wall and widen its transverse coverage. The mechanism of near field crossflow is different from that of far field, which requires disparate forms of corresponding empirical correlations.
INVESTIGATION OF WATER DROPLET EROSION IN THE RADIAL TURBINE OF A FUEL CELL TURBOCHARGER
Authors:   Institute of Jet Propulsion and Turbomachinery Technische Universität Braunschweig, Wittmann Tim , Lück Sebastian ,   Institute of Jet Propulsion and Turbomachinery Technische Universität Braunschweig, Bode Christoph ,   Institute of Jet Propulsion and Turbomachinery Technische Universität Braunschweig, Friedrichs Jens ,   Institute of Jet Propulsion and Turbomachinery Technische Universität Braunschweig
Published: October 2022

Radial turbines of fuel cell turbochargers are prone to water droplet erosion (WDE). Test bench runs of such a turbine showed erosion zones on the rotor suction side near the leading edge and on the stator suction side near the trailing edge. The aim of this study is to analyze this erosion and determine which droplet trajectories are responsible for it. For this purpose, Euler-Lagrange simulations of the non-equilibrium condensing flow are analyzed with regard to droplet deposition. It is shown that the droplets originating from condensation are not responsible for the observed erosion. It is therefore investigated whether an inflow of droplets from the fuel cell itself can be responsible for the erosion. The study indeed shows that such droplets can form wall films on rotor and stator. Therefore, the observed erosion is most likely the result of droplets formed by the break-up of wall films at the trailing edge of the stator vanes and also at the leading edge of the rotor blades.
Numerical Investigations into the Effects of Turning Vanes on Heat Transfer and Flow of a 2-Pass Ribbed Internal Cooling Channel with a UShape Bend
Authors:   State Key Laboratory of Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, YAO Jiaxu , LU Ruishan ,   AVIC the First Aircraft Institute Xi’an, Shaanxi, P.R.C, LEI Jiang ,   State Key Laboratory of Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, SU Pengfei ,   Dongfang Turbine Co. Ltd. Deyang, Sichuan, P.R.C, FANG Yu ,   Dongfang Turbine Co. Ltd. Deyang, Sichuan, P.R.C
Published: October 2022

The bend region of internal cooling channels usually has uneven heat transfer distribution and high pressure drop. In the present paper, steady-state RANS simulations are employed to investigate the effects of guide vane on the heat transfer and flow of a 2-pass ribbed internal cooling channel connected by a 180° U-shape bend. The cooling channel has a hydraulic diameter of 16.93 mm and an aspect ratio of 2:1, while the Reynolds number ranges from 20000 to 60000, with an increment of 10000. Two guide vane geometries are considered, half-circle vane and half-circle vane with a downstream extension. Results show that guide vanes do not have obvious effects on the first pass, however, in the bend region the flow separation is mitigated a lot and the heat transfer distribution is much more uniform. The pressure drop is reduced considerably by the guide vane.
Christian family role in implementing Christian education in family context to Christian character building
Authors: Labobar Kresbinol
Published: October 2022

Christian families are the primary institution in forming children's character into one that reflects Christlikeness. Instructing, educating, and guiding their children to become God-fearing individuals is a crucial responsibility that parents should take very seriously. This makes it necessary for them to take on a variety of roles in their children's character education, including 1) religious teacher, teaching their kids the fundamentals of Christianity to help them develop spiritual intelligence, 2) religious educator, educating kids faith-based applications to help them develop good personalities, and 3) religious role model, influencing their kids' lives. Children's character development leads to four outcomes: 1) a life filled with Christlike qualities that serve as a benchmark for their Christian faith; 2) a life guided by the Holy Spirit, who transforms children's lives; 3) an exemplary Christian life as a result of maturity, and 4) a life that bears the fruit of the Spirit.