bluuebunny/crossref_metadata_2025 huggingface dataset:
VIRTUAL MARKETING IN COMMUNICATION
Authors:   State University of Intellectual Technologies and Communications, Striy Lyubov , Chukurna Оlena ,   State University of Intellectual Technologies and Communications, Bondarenko Olena ,   State University of Intellectual Technologies and Communications
Published: March 2023

This article presents the results of a study on the use of the latest virtual marketing tools in communications. Virtual marketing and virtual markets are currently evolving, adapting rapidly to continuous technological change. The problem is topical and very interesting for economic science. The main body of the article reveals the characteristics of the application of new virtual marketing tools in communications. The advantages of modern virtual marketing are highlighted. They manifest themselves in the fact that virtual organisations take an active part. For them, the boundaries between its participants, resources and offices are open due to intensive information links. In order to avoid incorrect reading of the article's content, modern interpretations in understanding of the article's material have been clarified and modern content of the concepts used in the article, have been disclosed in the author's presentation. The essence and content of virtual marketing is considered. Several interpretations of the essence of this concept are applied: in the narrow sense, in the broad sense, the former definitions of marketing. The advantages of using virtual marketing in comparison with marketing based on traditional technologies are determined. The main goals and objectives, strategies of virtual marketing in virtual markets in communications are formulated. Scientific novelty and originality of the material of the article lies in the fact that it is revealed in a new way virtually unexplored aspects of marketers' use of virtual marketing tools. With practical implementation of the proposals presented in the article, it is possible to achieve harmony of interests between marketers of virtual products and all other participants in the system of modern virtual markets in communications. Further research may focus on detailed elaboration of the developed proposals and recommendations for their practical application. The use of the scientific materials presented in the article may allow other scientists to study various aspects of marketing activities on virtual markets in communications.
Population genetic structure in natural and reintroduced beaver (Castor fiber) populations in Central Europe
Authors:   Inst. of Inorganic and Analytical Chemistry and Radiochemistry, Saarland Univ., Germany, Kautenburger R. , Sander A. C. ,   Justus–Liebig Univ., Germany
Published: March 2023

Castor fiber Linnaeus, 1758 is the only indigenous species of the genus Castor in Europe and Asia. Due to extensive hunting until the beginning of the 20th century, the distribution of the formerly widespread Eurasian beaver was dramatically reduced. Only a few populations remained and these were in isolated locations, such as the region of the German Elbe River. The loss of genetic diversity in small or captive populations throughgenetic drift and inbreeding is a severe conservation problem. However, the reintroduction of beaver populations from several regions in Europe has shown high viability and populations today are growing fast. In the present study we analysed the population genetic structure of a natural and two reintroduced beaver populations in Germany and Austria. Furthermore, we studied the genetic differentiation between two beaver species, C. fiber and the American beaver (C. canadensis), using RAPD (Random Amplified Polymorphic DNA) as a genetic marker. The reintroduced beaver populations of different origins and the autochthonous population of the Elbe River showed a similar low genetic heterogeneity. There was an overall high genetic similarity in the species C. fiber, and no evidence was found for a clear subspecific structure in the populations studied.
Пеналізаційна практика у європейському кримінальному дискурсі : навчальний посібник
Authors:   Національний університет ", Туляков Вячеслав Олексійович ,   Одеська юридична академія", Іскендеров Фірдовсі Шошан огли , Хильченко Анастасія Сергіївна
Published: March 2023

Навчальний посібник «Пеналізаційна практика у європейському кримінальному дискурсі» виданий в рамках фундаментального наукового проекту «Євроінтеграційна кримінальна політика України» № 0118U003677 з метою напрацювання методичних матеріалів та навчальних посібників за програмою ERASMUS + КА 1 «Модернізація магістерських програм для майбутніх суддів, прокурорів, слідчих з урахуванням європейських стандартів з прав людини, 598471-EPP-1-2018-1-AT-EPPKA2-CBHE-JP». Відповідні наукові розвідки у галузі розуміння порівняльно-правових характеристик кримінально-правового впливу, індивідуалізації покарання та розвідок сучасної пеналізаційної практики було розроблено з акцентом на відповідну практику Європейського суду з прав людини. Для науковців, викладачів, здобувачів вищої освіти, а також працівників галузі кримінальної юстиції.
THE MONOPOLY PRACTICE AND UNFAIR BUSINESS COMPETITION IN THE TECHNOLOGY TRANSFER ACTIVITY THROUGH THE FOREIGN PATENT IN INDONESIA
Authors: Faujura Rahmanisa Purnamasari , Gultom Elisatris , Sudjana Sudjana
Published: March 2023

It is a common knowledge that technology development shall be in line with the development of a nation. This fact is raising the need of developing countries as Indonesia to maximize potential in the field of technology. However, it is not easy as it sounds, there are many obstacles for a country to develop its potential in technology, notably for the expert in the relevant country to master the necessary skills. Due to this limitation, many countries are beginning to fill-in the gap by registering license of foreign patent. It is expected that the use of foreign patent will replace the higher cost and longer time needed in developing local technology in the developing countries. Unfortunately, the use of foreign patent license does not itself automatically enhance oneâ€™s ability to master the necessary skills. Many cases where developing countries were deceived by the â€˜grant-backâ€™ clause attached to the foreign patent license. The licenseeâ€™s position is consequently considered has lower than of the licensor, which in its turn may rise monopoly practice and unfair business competition. This study is conducted with the purpose to formulate an effective technology transfer through the licensing of foreign patent that can refrain from the repetition of monopoly practice and unfair business competition, according to the TRIPs signed by WTO and the positive law in Indonesia. This study is using juridical-normative approach as the methodology of research, it also use analytical approach through the Law Number 13 of 2016 concerning Patent; Law Number 5 of 1999 concerning Prohibition of the Monopoly Practice and Unfair Business Competition as well as the Agreement on Trade-Related Aspects of Intellectual Property Rights signed by the World Trade Organization, with respect to the license agreement of the foreign patent. Based on the issue as established previously in this journal, the expected outcome of increased information dissemination towards countries using patent licensing agreement in technology and information development related to any matter in intellectual property specifically in licensing agreement, which has higher possibility for Monopolistic Practices and Unfair Business Competition. Therefore, shows that in principle in order to prevent the licensing of foreign patent to lead onto the monopoly practice and unfair business competition, a country must establish a controlling entity to supervise the execution of the foreign patent and at the same time, enacting harmonious rules and regulations with such supervision.
Ethical and methodological challenges of conducting research of ‘asylum institutional elites’
Authors: Cintra de Oliveira Tavares Natalia
Published: March 2023

Research with elite groups poses a number of challenges for researchers. The study of asylum institutional elites brings even further difficulties, considering the political interests surrounding the topic. This paper considers these difficulties in the context of studying asylum institutional elites in Brazil in the author’s own PhD research, and provides the answers found to overcome some of these challenges. Albeit important, being able to access closed-door meetings, to observe the daily political plays and struggles that reverberate on how refugees are produced, managed, seen and controlled, creates a challenging ethical backdrop to ensure the care responsibility that should underscore any ethical research standards. As such, this paper particularly focuses on how a double role in the field – as a professional and a researcher – can contribute to and enrich institutional research, and how to overcome the methodological and ethical challenges of doing research this way.
Hyperhomocysteinemia due to Vitamin B12 Deficiency with MTHFR Gene Mutation, an Atypical Metabolic Cause of Young Ischemic Stroke: A Case Report
Authors: Qayyum Junayed Abdul , Sayeed S K Jakaria Been , Ahmed Fatema , Sarker Poritash Kumar , Mahmud Reaz
Published: March 2023

Background: Vitamin B12 deficiency can impair the metabolism of homocysteine, leading to hyperhomocysteinemia that can cause thrombosis in the intracranial blood vessels resulting in a stroke.
Case Presentation: A 15-year-old Muslim young boy initially presented with pallor, slurred speech, right facial weakness, and right-sided hemiplegia. On examination, he was found moderately anemic, nonicteric, and with right-sided stroke evidenced by hypertonia, reduced muscle power jerk exaggerated with extensor plantar response. There was no lymphadenopathy, bony tenderness, intellectual impairment, or organomegaly, and normal vital parameters with the unremarkable cardiovascular examination. Laboratory investigations revealed pancytopenia, with reduced Vit B12, folic acid, and moderately increased homocysteine level. Bone marrow study suggestive of megaloblastic anemia. Immunological, infectious screens; and prothrombotic markers were found negative. CT scan of the head revealed a hypodense lesion in the left parieto-occipital region, DWI sequence on MRI Brain revealed diffusion restriction in the same area while an MR angiogram of the Brain revealed occlusion of the left middle cerebral artery due to thrombus sparing a small segment after its origin. In addition, he had MTHFR c677 C>T (Methyl tetrahydrofolate reductase) gene mutation and responded both clinically and biochemically after vitamin B12, folic supplementation along with aspirin in 5 months.
Conclusion: Vitamin B12 deficiency along with MTHFR c677 C>T gene mutation has increased the chance of thrombotic stroke. Vitamin B12 supplementation might be beneficial for patients with an MTHFR gene mutation positive.
J MEDICINE 2023; 24: 51-55
Implementasi Media Boneka Jari Melalui Kegiatan Bercerita Dalam Mengembangkan Kemampuan Berbicara Anak Usia Dini
Authors: Sriyanti Sriyanti , Putri Novi Dyah Ayu
Published: March 2023

Abstract: This study aims to describe the development of children's language skills by applying the storytelling method assisted by finger puppet media in Kindergarten ABA II "ALAM" Bojonegoro, by looking at the problem regarding the low ability of children's language, especially in speaking ability. This type of research is action research carried out in two cycles consisting of planning, action, observation and reflection. The subjects of this study were 15 children. Research data on language skills were obtained using the observation method through instruments in the form of observation format sheets. The collected data were analyzed using descriptive statistics and quantitative descriptive analysis. The results of data analysis showed that there was an increase in the average score of children's language skills after the application of the finger puppet media-assisted storytelling method cycle I of 58.47% which was in the low category. Then in cycle II it becomes 84.00% which is in the high category. So the increase in language skills after applying the storytelling method assisted by finger puppet media is 25.33%.Keywords: Language Skills, Finger Puppets, Storytelling.Abstrak: Penelitian ini bertujuan untuk untuk mendiskripsikan pengembangan kemampuan berbahasa anak dengan penerapan metode bercerita berbantuan media boneka jari di TK ABA II “ALAM” Bojonegoro, dengan melihat permasalahan mengenai rendahnya kemampuan berbahasa anak khususnya dalam kemampuan berbicara. Jenis penelitian ini adalah penelitian tindakan yang dilaksanakan dalam dua siklus yang terdiri atas perencanaan, tindakan, pengamatan dan refleksi. Subjek penelitian ini adalah 15 orang anak. Data penelitian tentang kemampuan berbahasa diperoleh dengan menggunakan metode observasi melalui instrumen berupa lembar format observasi. Data yang telah dikumpulkan dianalisis menggunakan statistik deskriptif dan analisis deskriptif kuantitatif. Hasil analisis data menunjukkan bahwa terjadinya peningkatan rata-rata skor kemampuan berbahasa anak setelah diterapkan metode bercerita berbantuan media boneka jari siklus I sebesar 58,47% yang berada pada kategori rendah. Kemudian pada siklus II menjadi 84,00% yang berada pada kategori tinggi. Jadi peningkatan kemampuan berbahasa setelah diterapkan metode bercerita berbantuan media boneka jari sebesar 25,33%.Kata kunci : Kemampuan Berbahasa, Boneka Jari, Bercerita.
The Temporal and Spatial Effects of Reconstructive Surgery on the Atrophy of Hindlimb Muscles in Anterior Cruciate Ligament Transected Rats
Authors: KANEGUCHI A , OZAWA J , MINAMIMOTO K , YAMAOKA K
Published: March 2023

After anterior cruciate ligament (ACL) injury, a decrease in muscle strength associated with muscle atrophy is frequently observed. The temporal and spatial effects of reconstructive surgery on muscle atrophy have not been examined in detail. This study aimed to 1) reveal the short and mid-term effects of reconstructive surgery on muscle atrophy, and 2) investigate the differences in the degree of atrophy after ACL reconstruction in the hindlimb muscles. ACL transection with or without reconstructive surgery was performed unilaterally on the knees of rats. Untreated rats were used as controls. At one or four weeks post-surgery, the relative muscle wet weights (wet weight/body weight) of the hindlimb muscles were calculated to assess atrophy. At one week post-surgery, muscle atrophy was induced by ACL transection and further aggravated by reconstructive surgery. Reconstructive surgery facilitated recovery from muscle atrophy in some muscles compared with those without reconstructive surgery (ACL transection alone) at four weeks post-surgery. Muscle atrophy after ACL reconstruction was greater in the rectus femoris and plantar flexors than in the semitendinosus and plantar extensors at one week post-surgery. These results indicate that reconstructive surgery exacerbates muscle atrophy in the first week post-surgery, while facilitating recovery between the first and fourth week post-surgery. After reconstructive surgery, muscle atrophy was observed not only in the quadriceps and hamstrings, but also in the lower leg muscles, suggesting the need for muscle strengthening interventions for the lower leg muscles as well as the quadriceps and hamstrings.
ASIC1a Involves the Acid-Mediated Activation of Pancreatic Stellate Cells Associated With Autophagy Induction
Authors: WANG T , WANG Q , PAN G , JIA G , LI X , WANG C , ZHANG L , ZUO C
Published: March 2023

The acidic tumor microenvironment (TME) of pancreatic cancer affects the physiological function of pancreatic stellate cells (PSCs), which in turn promotes cancer progression. Acid-sensing ion channel 1a (ASIC1a) is responsible for acidosis-related physiopathological processes. In this study, we investigated the effect of acid exposure on the activation and autophagy of PSCs, and the role of ASIC1a in these events. The results showed that acidic medium upregulated the expression of ASIC1a, induced PSCs activation and autophagy, which can be suppressed by inhibiting ASIC1a using PcTx1 or ASIC1a knockdown, suggesting that ASIC1a involves these two processes. In addition, the acid-induced activation of PSCs was impaired after the application of autophagy inhibitor alone or in combination with ASIC1a siRNA, meaning a connection between autophagy and activation. Collectively, our study provides evidence for the involvement of ASIC1a in the acid-caused PSCs activation, which may be associated with autophagy induction.
Chronic Obstructive Pulmonary Disease and Arterial Stiffness
Authors: Sarkar Malay
Published: March 2023

Comorbidities are common in chronic obstructive pulmonary disease (COPD). Cardiovascular comorbidity is a leading cause of morbidity and mortality in COPD patients. Low lung function is a risk factor for increased arterial stiffness, a condition that is common in COPD patients, independent of conventional cardiovascular risk factors. Arterial stiffness is an independent risk factor both for all-cause and for cardiovascular mortality, and carotid–femoral pulse wave velocity is the gold standard for the assessment of arterial stiffness. Various mechanisms proposed in the development of arterial stiffness include systemic inflammation, ageing, advanced glycation end products, renin–angiotensin–aldosterone system, increased elastolysis, and vitamin D deficiency. Early detection of arterial stiffness in COPD patients is warranted to detect cardiovascular comorbidity at the subclinical stage, which would help to prevent overt vascular events in the future. We need well-designed studies to see the impact of therapy that targets increased arterial stiffness on future cardiovascular events in COPD. This review discusses the epidemiology, diagnosis, and therapy of increased arterial stiffness in COPD patients.
Therapy for Alpha-1 Antitrypsin Deficiency: The Evidence for Efficacy
Authors: Stevens Rachel
Published: March 2023

Prof McElvaney opened the symposium with a brief overview of the disease history and available treatments to date for alpha-1 antitrypsin deficiency (AATD). He then introduced Dr Reeves, who gave a description of the physiological function of alpha-1 proteinase inhibitor (α1-PI), specifically its effect on neutrophil function in AATD. Dr Parr then discussed the limitations of using forced expiratory volume (FEV1) to observe lung disease progression, and the development and use of measurements of lung density as an alternative. Dr Seersholm followed with a comprehensive overview of recent clinical studies demonstrating the efficacy of α1-PI augmentation therapy. Dr Chapman gave the final presentation that expanded on this by describing the findings of the randomised, placebo-controlled trial of augmentation therapy in α1-PI deficiency (RAPID) study. The meeting objectives were to present the current treatment landscape for AATD-associated emphysema and the role of α1-PI therapy within this.
Analysis of students’ mathematical concept understanding ability in learning after covid-19 pandemic at SMPN 1 Anyar
Authors: Jannah Sella Miftahul , Hendrayana Aan
Published: March 2023

The purpose of this study was to determine the ability of SMPN 1 Anyar students to understand mathematical concepts in learning after the Covid-19 pandemic. The method used in this study is a qualitative descriptive method with students of IX-C SMPN 1 Anyar as the participants. The data were collected from a test form of 7 description questions with the focus of quadratic equation material and a semi-structured interview as a non-test instrument. The results of the student's mathematical concept understanding ability test are found to be two students with very good categories, three students with good categories, eight students with medium categories, there are nine students with low categories, and ten students with very low categories. Thus, it can be concluded that the students’ mathematical understanding ability of SMPN 1 Anyar in post-Covid-19 pandemic learning is still relatively low.
MST: O HEROI QUE VIROU VILÃO
Authors:   UEMG - Universidade do Estado de Minas Gerais - Unidade Frutal, PESSOA MARCELO , MEIRA Glenda Varini ,   Universidade do Estado de Minas Gerais - Unidade Frutal, MELOZI Guilherme César ,   Universidade do Estado de Minas Gerais - Unidade Frutal, PERES João Otávio Montanhani ,   Universidade do Estado de Minas Gerais - Unidade Frutal, SILVA Fabiana Vieira da ,   Universidade do Estado de Minas Gerais - Unidade Frutal, SILVEIRA Ana Laura Ribeiro ,   Universidade do Estado de Minas Gerais - Unidade Frutal, TADEI João Pedro Berrocal ,   Universidade do Estado de Minas Gerais - Unidade Frutal, TEIXEIRA Cauê ,   Universidade do Estado de Minas Gerais - Unidade Frutal
Published: March 2023

The present work discusses the social and cultural role of the MST (Landless Workers' Movement) in the contemporaneity of national politics. Our study is justified by the fact that, at the beginning of Lula's third presidential term, the MST began to practice acts of invasion of properties with greater recurrence, whether productive or not. Methodologically, the research will be carried out through a bibliographical search and literature review in digital collections. As partial results of this investigation, it is hoped that the main motivations that have led to the MST invasion agenda will be brought to light. The aim of this study is to provide the academic community with up-to-date information, albeit briefly discussed, on the progress of land occupation and expropriation in Brazil. The main bibliographic contribution of this research focuses on the work Dialética da Colonização, by Alfredo Bosi (1992).
Challenges and Limitations in Modelling Mixed Convection Type of Flows Inside Turbine Cavities
Authors:   Oxford Thermofluids Institute University of Oxford, Murat* Oguzhan , Rosic Budimir ,   Oxford Thermofluids Institute University of Oxford
Published: March 2023

The next generation power generation turbines will be required to operate flexibly with frequent start-ups and shutdowns due to the increasing presence of renewable sources. During the shut-downs regimes, the flow field within the steam and gas turbines exhibits mixed convection type flow with varying contribution of buoyant flows depending on the operating condition. Since the experiments on the real engines are often not possible due to the harsh operating conditions and the limited access to the flow field, numerical methods are sought. Although the scale resolving simulations have gained a great attention among scientific community, the RANS based turbulence models are still the industrial standard as they require significantly lower computational resources. Traditionally, the emphasis in turbulence modelling has been given to the pure natural and forced convection separately. Therefore, the literature lacks on the modelling of the mixed type of convection. This paper investigates the capabilities of conventional RANS turbulence modelling for mixed convection type of flows, and the limitations of commonly used Boussinesq hypothesis and simple gradient diffusion hypothesis for the Reynolds stress and the turbulent heat flux modelling, respectively. The performance of these models is assessed using the experimental data from the turbine cavity rig and the scale resolving simulation.
Single-Stage Axial Transonic Compressor Flow – CFD Simulations Including a Systematic Quality Assurance Procedure
Authors:   ISimQ, Hansen Thorsten , Munktell Erik ,   Siemens Industry Software, Scheuerer Georg ,   ISimQ, Zwiener Kim ,   Siemens Industry Software
Published: March 2023

This paper presents CFD simulations of the transonic flow through the single-stage axial compressor documented in the “TUDa-GLR-OpenStage” test case of GLR. Before comparing the CFD results to the experimental data, the results were subject to a systematic quality assurance method, including quantification of iteration and discretisation errors. After computing the numerical errors, the paper compares simulations and data and discusses the influence of turbulence models and uncertainties on the results.
Endwall Geometric Uncertainty and Error on the Performance of Tuda-Glr-Openstage Transonic Axial Compressor
Authors:   School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Xia Kailong , He Xiao ,   Department of Mechanical Engineering, Imperial College London, Zhu Mingmin ,   School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Klausmann Fabian ,   Institute of Gas Turbines and Aerospace Propulsion, Technische Universitat Darmstadt, Teng Jinfang ,   School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Vahdati Mehdi ,   Institute of Gas Turbines and Aerospace Propulsion, Technische Universitat Darmstadt
Published: March 2023

The hub and casing walls of axial compressors are often modeled as smooth continuous surfaces in CFD simulations, but in real geometries, non-smooth pinches, steps and leakage cavities may exist. In the GPPS first Turbomachinery CFD Workshop, a comprehensive validation and verification campaign of RANS flow solvers was conducted, and all the simulation results consistently over-predicted the total pressure ratio at the rotor exit near the casing and the stator exit near the hub. From a recent examination of the test rig geometry, a pinched casing wall over the rotor and a leakage cavity below the stator were found, which were not considered in the workshop. In this paper, the effects of these endwall geometric uncertainties and errors are analyzed via numerical simulation. When considering the rotor casing pinch of the test geometry, the predicted total pressure ratio and choke mass flow of the compressor stage are smaller than that without the pinch, which shows better agreement with the measured data. When considering a stator hub cavity with a leakage flow rate about 0.2% of the compressor inlet mass flow, the near-hub total pressure ratio distribution matches better with the experimental data, but the effects on the global compressor stage characteristics are not visible. The relevant mechanisms of these changes in performances are analyzed in detail. The updated geometries and grids will be released to the public as a benchmark test case for turbomachinery CFD.
Starting and Windmilling Simulations Using Compressor and Turbine Maps
Authors:   Kurzke Consulting, Kurzke Joachim
Published: March 2023

Starting and windmilling simulations with a normal gas turbine performance program require extended compressor and turbine maps which include sub-idle corrected speeds down to say 5-10% of the design value. During such simulations certain specific phenomena which are insignificant in the normal operating range between idle and full power must be considered. For example, while starting a low bypass ratio mixed flow turbofan, flow reversal in the bypass duct can occur. This paper illustrates a general understanding of what happens from when the starter is activated to when stabilized idle operation is reached. Operating lines in the compressor and turbine maps are predicted depending on starter torque, starter power, burner light-up and starter cut-off speed. It is explained why knowing combustor efficiency precisely is not required for that. Simulating engine starting and windmilling is not a magical art. The laws of physics still apply at these somewhat exotic operating conditions.
Investigation of Large Scale Unsteady Rim Seal Flow Structures and their Influence on The Rotor Hub Side Endwall Heat Transfer
Authors:   Institute of Gas Turbines and Aerospace Propulsion, Ostrowski Tom , Schiffer Heinz-Peter ,   Institute of Gas Turbines and Aerospace Propulsion
Published: March 2023

Unsteady large scale flow structures rotating in rim seal cavities are identified to possibly influence the flow field near the hub side endwalls in axial turbines. Recently, a number of investigations were published on their identification, quantification and interpretation. As the formation of the cavity structures can be dominated by the unsteady interaction between stator and rotor, complex test setups are necessary requiring rotating facilities. Concerning numerical investigations, transient full circle CFD-setups or at least multiple sectors are necessary to allow the formation of the rotating cavity structures. This conference contribution presents a combined experimental and numerical study of rotating cavity structures identified in the hub side region of the Large Scale Turbine Rig at Technische Universität Darmstadt, Germany. Unsteady aerodynamic probe data close to the endwall but in the main annulus are combined with unsteady wall pressure information located inside the cavity. The data is used to validate an unsteady 60°-sector CFD. Using infrared based instantaneous wall temperatures on the rotor hub side endwall the purge flow distribution is evaluated and again accompanied by CFD-results. For the investigated purge flow rate, the instantaneous rim seal distribution is shown to be dominated by the identified cavitymodes leading to strong inhomogeneities between the single rotor passages.
CFD Modelling of a Complete Enclosed Jet Engine Test Bed and Validation with Pass-Off Data
Authors:   Institute of Jet Propulsion and Turbomachinery Technische Universität Braunschweig, Spuhler Tobias , Friedrichs Jens ,   Institute of Jet Propulsion and Turbomachinery Technische Universität Braunschweig, Städing Jörn ,   MTU Maintenance Hannover GmbH, Reitz Gerald ,   MTU Aero Engines AG, Marx Martin ,   MTU Maintenance Berlin-Brandenburg GmbH
Published: March 2023

By using CFD modelling on jet engine test cells, it is possible to get a detailed understanding of the internal flow conditions and aerodynamic interactions between the test facility and an installed jet engine. This knowledge is essential to predict the integration of new engine types into existing enclosed jet engine test beds as well as to support test cell trend monitoring. The present paper provides a summary of the CFD modelling of a real jet engine test bed at MTU Maintenance. A full scale 3D CFD model is generated, which combines all test bed components, such as inlet, test cell, augmenter, and exhaust tower. Within the model, all installations were taken into account, which affect the test cell mass flow and/or the local velocity and pressure field around the engine. Exemplary simulations are carried out with a civil turbofan engine of medium thrust range at different operating conditions from flight idle to maximum take-off thrust. A comparison of simulation results and measured pass-off test data suggests a strong correlation and hereby a high fidelity of the presented CFD model. This valid replication of the test bed characteristics opens up various application cases for the model resulting in an improvement of safety and efficiency in jet engine testing.
Economically and Aerodynamically Optimized Closure of Wind Tunnel Test Sections
Authors:   Jade University of Applied Sciences, Konrad M. Hartung Konrad M. Hartung , Dennis M. Sanders Dennis M. Sanders ,   Jade University of Applied Sciences, Karsten Oehlert Karsten Oehlert ,   Jade University of Applied Sciences
Published: March 2023

For high-lift models like airfoils for wind turbines, aircraft or turbomachinery applications wind tunnel measurements in open test sections are often unsuitable for determining precise lift and drag coefficients as streamwise gradients and the imposed ambient pressure boundary condition at the shear layer of the free jet can lead to a deviation of the local base pressure. Therefore, based on the existing closed circuit wind tunnel Göttingen-Type with circular cross-section at the Jade University of Applied Sciences, the authors present an approach for an economically and aerodynamically optimized closure of the wind tunnel test section. For ease of installing models and measurement instrumentation as well as optical accessibility the cross-section of the test section was chosen to be square shaped. With the objective to keep the numbers of new components to be manufactured manageable the transition of the cross-sectional shape from round to square has been embedded into the designed nozzle geometry. For the investigation on its effect on the homogeneity of the flow quantities, numerical simulations of a simplified wind tunnel model were conducted. In total, three different setups have been considered, including a setup with fully circular and mostly square shaped cross-sections for comparison. The evaluation was carried out based on the percentage velocity variation on a fixed number of evaluation planes within the test section. The results show that the financially most reasonable setup also positively affects the flow homogeneity in the closed test section. With the outlined design approach an overall higher flow homogeneity can be achieved compared to a setup with a fully square cross-section. Further as a lower energy demand for operation can be expected due to lower pressure losses of circular shaped flow guiding components a corresponding setup is economical beneficial .
Finding the Hawking temperature of two new types of topological black holes using the RVB method
Authors: CHEN WEN-XIANG
Published: March 2023

To calculate the Hawking temperature of a topological black hole, one must take into account the proper distance, as the presence of topological defects can cause a change in the local geometry of the black hole, which in turn affects the calculation of the Hawking temperature. Therefore, when calculating the Hawking temperature of a topological black hole, it is necessary to consider the influence of the proper distance.In this paper, we calculate the Hawking temperature of two new topological black holes models proposed in reference 9 using the RVB method.
A atuação do psicólogo na Atenção Primária da Saúde
Authors: Rodrigues Érica de Andrade , Marques Raíssa Alves , Venâncio Karen Eduarda Alves
Published: March 2023

Considerando a importância e as diferentes possibilidades de atuação do(a) psicólogo(a), inserido no Sistema Único de Saúde (SUS), essa pesquisa tem como objetivo compreender o trabalho deste(a) profissional no setor primário de saúde. A presente pesquisa é resultado de revisões bibliográficas que fomentam ações e políticas de atuação deste profissional no campo de atuação do SUS. Os dados apresentados e discutidos no trabalho partiram da seguinte problemática: há para a atuação do(a) psicólogo(a) no setor primário de saúde, diretrizes que garantam primazia às suas práxis? Para responder esse questionamento, foram selecionados cinco textos em que a temática central discorria sobre tal atuação. Das análises bibliográficas observou-se que, de uma maneira geral, os(as) psicólogos(as) encontram dificuldades ao ingressarem na Atenção Primária, relacionadas aos desafios relativos à formação e atuação da categoria profissional, e também em relação a precariedade de políticas públicas que viabilizem e assegurem a atuação deste profissional, o que colocando em descrença iniciativas destes profissionais, que, apesar de enfrentarem inúmeros fatores que dificultam sua práxis, também viabilizam projetos de atuação com resultados significativos.
Psicologia social, interseccionalidade e processos de subjetivação
Authors: Hoepers Aline Daniele
Published: March 2023

A realidade social e as vivências nela engendradas são multifacetadas. Dispor de um olhar interssecional diante desta complexidade é fundamental para interrogarmos modos de compreensão universalizantes e estigmatizantes sobre os sujeitos. Com este enfoque, este estudo, de natureza teórica, tem como objetivo produzir reflexões críticas sobre os processos de subjetivação produzidos na e pela vida cotidiana, dinamizada e impactada pela intersecção de sistemas de opressão. Esse intercruzamento cria e/ou aprofunda desigualdades sociais variadas e expressões de sofrimento humano. Frente a isso, o artigo propõe discussões conceituais sobre interseccionalidade e reflete sobre eixos fundamentais à concretização de uma Psicologia Social atenta e implicada com o interjogo das opressões e seus impactos na vida subjetiva e relacional das pessoas. Convida, ainda, leitoras e leitores a realizar deslocamentos que cooperem com a construção de uma Psicologia comprometida com o enfrentamento das opressões e com o reconhecimento da diversidade e da diferença como potências de colaboração.
Planejamento urbano: o caso do Jardim das Nações e Jardim Oásis na cidade de Paranavaí - PR
Authors: Vieira Chirlei Silva , Denardi Ana Maria , Lara Camila Clozato
Published: March 2023

A cidade é o palco onde a vida urbana acontece. O processo de crescimento das cidades desencadeia transformações progressivamente mais intensas. A legislação e as diretrizes urbanísticas existem para nortearem o parcelamento, uso e ocupação de solo urbano de acordo com as necessidades sociais e econômicas de uma região no intuito de diminuir o impacto do crescimento sob o meio em que se insere. Este trabalho buscou levantar, primeiramente, os dados urbanísticos e legais que envolvem o Jardim Oásis e o Jardim das Nações no município de Paranavaí e, na sequência, entender quais os problemas urbanos encontrados após seu loteamento e sua parcial ocupação. Para isso, está pesquisa buscou entender a problemática em torno das causas e das consequências da configuração urbana do Jardim das Nações e Jardim Oásis na cidade de Paranavaí - PR. Para tanto, utilizou-se ametodologia investigativa baseada na análise das legislações federais, estaduais e municipais a fim de identificar quais as diretrizes voltadas para a formação dos loteamentos e as características tipológicas das edificações predominantes desse espaço, concomitante com o levantamento bibliográfico a respeito do tema. Além disso, foi realizado o levantamento in loco dos mobiliários e equipamentos urbanos através da metodologia qualitativa/quantitativa auxiliado por registro fotográfico. Por fim, discutiu-se os fatores relevantes para a compreensão do panorama local: a existência de muitos vazios urbanos que dificultam a mobilidade urbana dos moradores da região; além da ausência de equipamentos urbanos para o atendimento de saúde, educação, lazer, cultura e a carências de mobiliários urbanos, todos esses dados fazem parte do crescimento desordenado existente na área de pesquisa
Polymer-derived SiOC as support material for Ni-based catalysts: CO2 methanation performance and effect of support modification with La2O3
Authors: Szoldatits E. , Essmeister J. , Schachtner L. , Konegger T. , Föttinger K.
Published: March 2023

In this study, we investigated Ni supported on polymer-derived ceramics as a new class of catalyst materials. Catalysts have to withstand harsh reaction conditions requiring the use of a support with outstanding thermal and mechanical stability. Polymer-derived ceramics meet these requirements and bring the additional opportunity to realize complex porous structures. Ni-SiOC and La-modified Ni-SiOC catalysts were prepared by wet impregnation methods with target concentrations of 5 wt% for both metal and oxide content. Polymer-derived SiOC supports were produced using a photoactive methyl-silsesquioxane as preceramic polymer. Catalysts were characterized by N2-adsorption-desorption, XRD, SEM, H2-TPR, and in-situ DRIFTS. CO2 methanation was performed as a test reaction to evaluate the catalytic performance of these new materials at atmospheric pressure in the temperature range between 200°C and 400°C. XDR, H2-TPR, and in-situ DRIFTS results indicate both improved dispersion and stability of Ni sites and increased adsorption capacities for CO2 in La-modified samples. Also, modified catalysts exhibited excellent performance in the CO2 methanation with CO2 conversions up to 88% and methane selectivity >99% at 300°C reaction temperature. Furthermore, the pyrolysis temperature of the support material affected the catalytic properties, the surface area, the stability of active sites, and the hydrophobicity of the surface. Overall, the materials show promising properties for catalytic applications.
Diagnosis of extrapulmonary tuberculosis by ultrasound-guided biopsy: A retrospective comparison study
Authors: Xu Jin-Chuan , Shi Xia , Ma Xin , Gu Wen-fei , Fang Zhi-xiong , Zhang Hui , Fan Xiao-Yong
Published: March 2023

Objective

To compare the diagnostic performance of laboratory assays on the ultrasound-guided core needle biopsy samples for diagnosis of extra-pulmonary tuberculosis (EPTB) in HIV-positive and HIV-negative patients.

Methods

A total of 217 patients suspected to have EPTB underwent lesion biopsy from 2017 to 2020. Results of laboratory tests on the biopsy and non-biopsy samples were collected with clinical data for retrospective analysis of test utility. The calculated diagnostic accuracy of the tests was stratified according to the specimen types and HIV status.

Results

The cohort contained 118 patients with a final positive diagnosis of extrapulmonary tuberculosis (EPTB group, 54.4%) and 99 finally diagnosed as without TB (non-EPTB group, 45.6%). The risk factor for EPTB was HIV co-infection (OR 2.22, 95% CI 1.17-4.28, p = 0.014). In biopsy samples, GeneXpert (Xpert) showed higher sensitivity (96.6% [91.6-98.7], p < 0.0001) than culture (56.1% [47.0-64.9]). Regardless of HIV status, Xpert had the highest sensitivity (>95%) and specificity (nearly 100%) of any methods. In non-biopsy samples, only T-SPOT.TB (T-SPOT) showed higher sensitivity than culture (90.9% [62.3-99.5] vs 35.3% [17.3-58.7], p = 0.0037). Furthermore, the sensitivities of Xpert were lower in non-biopsy samples (60.0% [23.1-92.9], p = 0.022) than in biopsy samples (100% [86.7-100]). Even in smear-negative biopsy samples, Xpert still had higher sensitivity than culture and retained high specificity (100% [95.7-100]).

Conclusion

Superior performance of Xpert in diagnosing EPTB was observed regardless of HIV status and specimen types. Nevertheless, the biopsy samples still substantially facilitated the accurate diagnosis of extrapulmonary tuberculosis.
Encouraging prosocial behavior from older adults through robot teleoperation: A feasibility study
Authors: Maalouly Elie , Hirano Takashi , Yamazaki Ryuji , Nishio Shuichi , Ishiguro Hiroshi
Published: March 2023

Introduction

In Japan, the social climate surrounding older adults has gotten worse as a result of the spread of COVID-19 and the growing isolation of older adults who are increasingly unable to engage in prosocial behavior through work and volunteering. This is detrimental to the physical and mental well-being of older adults. The purpose of this study is to look into robot teleoperation for older adults as a viable way to deal with these issues and overcome the barriers preventing older adults from engaging in prosocial behavior.

Materials and methods

We designed and tested a remote-control approach for dialogue agents that is appropriate for older adults as well as evaluating their impressions in a real-world setting. Twelve older adults participated in experiments in two separate locations, a children's center and the city ward office, where they could remotely teleoperate a robot and have conversations with the visitors. In the city ward office, the older adults had a conversation with the visitors and gave them information and trivia quizzes about the city. In the children's center, older adults had conversations with children regarding their age, family, their likes, and dislikes. A questionnaire and interview were set up after the experiments to understand their impressions of the system and to clarify how older adults feel about certain issues regarding remote-controlled work, starting a new job, social interaction, to what extent have older adults been affected by the pandemic, how and in what ways has it affected their involvement in society, and whether teleoperating a robot can be a suitable approach to encourage prosocial behavior from them through volunteer work and social engagement.

Results

The results show that older adults have a strong desire to engage in volunteer work, but are hampered mainly by physical isolation resulting from COVID-19 restrictions and their declining physical and mental health. Their impressions of the teleoperation system were highly positive, as they enjoyed having conversations with children through the robot. With this teleoperation system, older adults were able to remote control a robot by themselves without major issues. It made interaction simpler as conversing with children through a robot added a layer of anonymity that allowed older adults to express themselves freely without worrying about how they are perceived by others in public.

Discussion

Older adults were able to successfully engage in prosocial behavior through remote-controlling a robot. The system seems to be effective at easing the physical barriers preventing older adults from engaging in volunteer work, which have worsened since the spread of COVID-19.
Considerations of valvular heart disease in children with ventricular assist devices
Authors: Si Ming-Sing , Sood Vikram , Biniwale Reshma , Peng David
Published: March 2023

Ventricular assist devices have become a valuable tool in the treatment of heart failure in children. The use of ventricular assist devices has decreased mortality in children with end-stage heart failure awaiting transplant. It is not uncommon for children with end-stage heart failure associated with cardiomyopathy or congenital heart disease to have significant systemic semilunar and atrioventricular valve regurgitation, which can impact the efficiency and efficacy of hemodynamic support provided by a ventricular assist device. Therefore, implanting clinicians should carefully assess for valve abnormalities that may need repair and impact device selection and cannulation strategy to effectively support this diverse population. The purpose of this review is to provide an overview of this important and relevant topic and to discuss strategies for managing these patients.
Successful surgical repair in an older adult with supracardiac total anomalous pulmonary venous connection: A case report
Authors: Wang Chunle , Xie Xia , Zhuang Huanwei , Huang Zhonghua , Iroegbu Chukwuemeka Daniel , Tang Mi , Fan Chengming , Yang Jinfu
Published: March 2023

Total anomalous pulmonary venous connection (TAPVC) is a rare, cyanotic and critical congenital heart disease where the entire left and right pulmonary veins fail to drain into the left atrium directly. Also, TAPVC-induced tissue hypoxia gradually worsens after birth. Thus, timely surgical repairs are recommended once diagnosed, particularly with pulmonary venous drainage obstruction(s). Nonetheless, in sporadic cases, patients with TAPVC survive to adulthood with no surgical treatment. Herein, we report a 46-year-old female with TAPVC, where the four pulmonary veins drain into to the innominate vein (IV) via the vertical vein. The patient developed palpitations and non-anginal chest pain following routine activities for over three months. The patient had a successful surgical correction with excellent postoperative recovery.