bluuebunny/crossref_metadata_2025 huggingface dataset:
La prise en compte du corps de l’enseignant dans la formation à distance : vers une nouvelle approche de la mise en scène de soi dans la relation pédagogique
Authors: Archieri Catherine
Published: June 2023

L’étude de la prise en compte de la dimension corporelle au sens large du terme n’est pas une nouveauté dans la relation pédagogique. Souvent évoquée par les praticiens, parfois étudiée par les chercheurs, elle est longtemps restée un point aveugle en formation à distance (FOAD). La crise sanitaire a généralisé les cours en ligne et avec eux le cortège de mal-être professionnel, notamment chez les enseignants les moins habitués à la FOAD. Le propos de cet article est de proposer quelques pistes de développement professionnel en matière de relation pédagogique à distance et de mise en scène de soi numérique.
Communication Systems and the Evolution of the Supply Chain
Authors: Samar Ben Slimene , Lassaad Lakhal
Published: June 2023

Under the pressure of the extremely complex and turbulent economic environment, mainly due to globalization and the strategies implemented by companies, logistics, like all the vital functions of the company, have undergone a real transformation redefining their role, mission, and field of action within the framework of an effort to adapt and restrict strategic dimensions. This chapter focuses on the evolution of the traditional supply chain to the notion of SCM. This evolution has taken place due to the emergence and use of information systems and IT. All this contributes to the achievement of overall organizational performance through the achievement of efficiency and effectiveness objectives. This technological advance certainly contributes to improving the links between the various partners in the chain through the sharing and exchange of information. This chapter highlights the prominent role of technological advances in making information reliable and accessible by all partners in the chain and also in achieving the organizational performance of all partners.
Moderating Role of Supplier Coordination Level in Relation to Data-Driven Supply Chain and Supply Chain Coordination Capability
Authors: Kara Karahan , Yalçın Galip Cihan , Önden Abdullah
Published: June 2023

Big data and big data analytics have contributed to the collection of large amounts of data. This has led to the transformation to data-driven supply chain (DDSC) structures. The supply chain coordination capability (SCCC) has also been strengthened in DDSC. In this study, the effect of DDSC on SCCC and the moderator effect of supplier coordination (SCO) have been investigated. The research was carried out in the manufacturing firms. Three hundred eighty-three pieces of data were obtained between August and December 2021 by the simple random sampling method. Two hypotheses were developed. Simple regression analysis was used to test the first hypothesis, and moderator effect analysis was performed with the SPSS process to test the second hypothesis. It has been determined that the DDSC has a significant effect on the SCCC. In addition, SCO has a moderating effect, and when there is a high SCO, the DDSC has a greater effect on the SCCC.
E-Leadership Concepts, Competencies, and Challenges
Authors: Liu Siyu , Rajendran Diana
Published: June 2023

The information technology industry is transforming organisations in unprecedented ways. The COVID-19 pandemic has resulted in most organisations having to convert to virtual offices. This transformation has promoted e-leadership in organisations as a means and style of management. To explore e-leadership, this chapter focuses on its concepts, competencies, and challenges. A systematic literature review was conducted involving 331 journal articles, of which 21 were explored in greater depth. The chapter provides a valuable insight into e-leadership practice. It argues that new e-leadership challenges arising from modern ICTs urgently require further research, especially in e-trust, work-life balance, and psychological contracts between management and workers. E-competencies need to be developed together with the ability to manage emotions to overcome challenges in virtual environments that did not exist in the ‘face-to-face' world.
Anglophone Shattered Hopes and Lost Illusions
Authors: Yigit Sureyya
Published: June 2023

This chapter investigates within the realm of political communication transformational and transactional leadership during and after the COVID-19 pandemic. It attempts to identify which qualities and styles political leaders need to incorporate in the face of such challenges such as the COVID-19 pandemic. It focuses on the actions taken by Trump, Johnson, Marin, and Ardern within the fields of public health strategies, education, and employment to draw a clear and contrasting portrait of the political landscape regarding trustworthy and resilient leadership.
Tourism, Poverty, and Human Rights
Authors: Korstanje Maximiliano Emanuel
Published: June 2023

Over recent years, the philosophical dilemma of human rights has occupied a central position in the academic debate worldwide. Of course, tourism seems not to be an exception. Despite the promising economic benefits and multiplying effects of tourism, some voices have alerted on the problems and limitations of tourism management to achieve a fairer wealth distribution in local communities. Having said this, the idea of tourism as a key force towards a more democratic and prosperous society began to be placed under the critical lens of scrutiny. This chapter, in this context, discusses critically how tourism potentiates economic growth but under some conditions deteriorating (if not vulnerating) the basic rights of locals. The opposite is equally true. Local communities embrace tourism to boost their economies while paradoxically making them more dependent and vulnerable to external economic actors.
Corporate Social Responsibility and Analysis of Its Social Dimension in Hotels in Malaga
Authors: Stopiakova Miriam , Haro-Aragú Marina , Garcia Alicia Martin
Published: June 2023

The main purpose of this research is to emphasize the importance of corporate social responsibility (CSR) within any hotel in operation. The main objective has focused on the analysis of social activities of CSR of accommodation in the city of Malaga. The basis of this project has been the investigation of the term CSR and its presence in tourism. At the same time, it has focused on the fact of the presence of the Covid-19 pandemic, which has caused many changes in tourism in recent years. As part of the investigation on the current situation of CSR activities in hotels Malaga city, interviews have been carried out with active professionals in the sector, in order to draw correct conclusions. Additionally, this project contributes with the proposal of activities within the social dimension of CSR of a hotel supporting the local community in different areas. It has been possible to reach various conclusions about the positive impact and importance of CSR in the hotel sector together with future lines of research, which can be supported by the results of this work.
Strain-Dependent Photoluminescence Line Shifts of the TS Color Center in 4H-SiС
Authors: Lehmeyer Johannes A.F. , Fuchs Alexander , Bornträger Titus , Popp Matthias , Weber Heiko B. , Krieger Michael
Published: June 2023

We present a detailed study of the behavior of the photoluminescence (PL) of the TS color center in 4H-SiC under controlled mechanical strain. We have investigated the TS1 line under varying strain, including its reaction to compression and tension. We use emission polarization measurements to gain access to the orientation of the underlying defects. We put our results in context with previous findings and find good agreement, corroborating the proposed microscopic model.
Selective Etch for Micromachining Process in Manufacturing Hybrid Microdevices composed of Ni-Mn-Ga and Silicon Layers
Authors: Hu Hao , Ullakko Kari
Published: June 2023

The goal of this study is to make selective etch possible for the next generation of MEMS(microelectromechanical systems) devices that are composed Ni-Mn-Ga and silicon layers. Due tothe large magnetic-field-induced strains of Ni-Mn-Ga, sensing and actuating components can be fab-ricated in the Ni-Mn-Ga layers. Other functional components can be manufactured in the silicon layer.Single crystalline Ni-Mn-Ga alloys that are grown by using the Bridgman vertical growth techniquehave so far obtained the largest magnetic field-induced strain (MFIS), a magnetic shape memory(MSM) effect. Similar to silicon wafers, Ni-Mn-Ga wafers are also sliced from crystal-oriented singlecrystalline ingots. To fabricate hybrid MEMS devices such as micromanipulators and robots, lab-on-chip containing micropump manifolds and valves, or vibration energy harvesters, the fabricationprocesses used for MEMS devices will be also used to fabricate components in the Ni-Mn-Ga layer ofthe hybrid MEMS devices. One of the most important processes for MEMS fabrication is the structur-ing of materials by chemical etching. The main goal of this study is to obtain evidence that the etchantetches silicon but not Ni-Mn-Ga and to identify an etchant that etches Ni-Mn-Ga but not silicon. Thepresent paper reports on a novel experiment in dissolving Ni-Mn-Ga alloys. An etchant compositionof 69% HNO3, 98% H2SO4, and CuSO4•5H2O is proposed for dissolving Ni-Mn-Ga alloys and thevariation in the dissolution rate by adjusting the concentrations of HNO3 and ultrapure water (UPW)is demonstrated. This etchant was demonstrated to etch Ni-Mn-Ga but not silicon. The HF+HNO3acidic solution commonly used for etching silicon does not dissolve Ni-Mn-Ga alloys.
Crashworthiness Analysis of Vehicle Crash-Box Filled with Aluminium Foam
Authors: Djamaluddin Fauzan , Renreng Ilyas , Ma’ruf Muhammad
Published: June 2023

Lightweight, robust, and anti-rust properties of aluminium foam might be a solution for reducing the effect of traffic accidents and for minimum fuel consumption. This research investigated the crashworthiness of vehicle crash-box filled with aluminum foam by varying its cross-sectional structure and its loading angle such as 0°, 10°, 20°, 30°. The variations consisted of structures for example single wall foam filled and double wall foam filled. The material used to construct the wall was Aluminum Alloy 2024 and Aluminium foam. The finite element model using Abaqus CAE Software was operated for both designing the crash-box and analyzing its crashworthiness. Some parameters were determined To obtain the best crash-box design, the finite element analysis was carried on total energy absorption, specific energy absorption, maximum load, average load, and crush-force efficiency. Double wall foam filled crash-box was shown to have better energy absorption ability and this structure of crush box is considered fpr vehicle structure in future.
Transfer of Heteroepitaxial Grown 3C-SiC Layers for Application in Optical Frequency Combs
Authors: Kollmuss Manuel , Shi Xia Dong , Ou Hai Yan , Wellmann Peter J.
Published: June 2023

We developed a process for the fabrication of SiCOI stacks which are a suitable platform for optical devices. Starting from 3C‑on‑Si samples the silicon substrate was removed by wet chemical etching and the remaining 3C‑SiC layers were bonded to two different low refractive substrates (Al2O3 and polycrystalline SiC with a 3 µm thick SiO2 layer on top deposited by PECVD). We found that also bonding onto Al2O3 was possible, the stability of the resulting stack wasn´t strong enough for further processing. In contrast mechanical stable SiCOI stacks could be realized using the oxide coated polycrystalline SiC as substrate. Besides the substrate materials three different bonding approaches (hydrophilic, hydrophobic and adhesive bonding using an HSQ resist) as well as multiple process parameters were analyzed with regard to the bonding performance. The best results could be achieved using the adhesive bonding approach with a bonding temperature ≥ 400°C, a process time ≥ 4 h and a bonding pressure of 96 N/cm2.
Properties of Polycarboxylate Superplasticizers with Different Molecular Structure: A Comparative Study
Authors: Yang Ren He , Zhang Peng Yu , Mao Zhi Yi , Wang Dong Mei , Sun Qian , Li Yang , Gu Yue , Wang Wan Shen , He Ting Shu
Published: June 2023

Polycarboxylate superplasticizers (PCEs) with different molecular structure had been synthesized and characterized by FT-IR. PCEs were mainly included polyester (Type A), polyether (Type B) and ester ether copolymer (Type C). The application properties, adsorption behaviors and hydration process were investigated. The TOC was used to measure the adsorption amount, and crystal components in the hydration products were detected by XRD analysis. Test showed that Type B had the excellent performance, including large water reduction rate and strong adsorption capacity. The ester group in the molecular structure of Type A and C could improve the fluidity retention of cement paste, but the hydrolysis of ester group also weakened adsorption capacity on cement particles. In addition, in the cement-water-PCEs system, the difference of molecular structure would affect the early hydration process of cement slurry. For example, research indicated that the main hydration peak and maximum elevated temperature was delayed by adding PCEs. Through the examination of hydration products, it revealed that the intensity of calcium hydroxide (CH) and ettringite (AFt) peaks with Type B was higher than the other. The concrete application performance results indicated that PCEs had the basically equal contribution to the compressive strength. Keywords molecular structure; ester group; adsorption; hydration products; compressive strength
Impact of Bias Temperature Instabilities on the Performance of Power Electronics Employing SiC MOSFETs
Authors: Hernandez Yoanlys , Schleich Christian , Stampfer Bernhard , Grasser Tibor , Waltl Michael
Published: June 2023

In this work a reliability study of SiC power MOSFETs working as switching elements in a DC-DC Boost converter circuit is discussed. A critical parameter for a high-performance operation is the stable characteristics of the transistors employed. However, charge trapping effects such as bias temperature instabilities can affect e.g. the threshold voltage of transistors and thus lead to a variation in circuit behavior and efficiency. Furthermore, a time-dependent drift of the threshold voltage (ΔVth) of the MOSFET over time can cause an increase of the on-resistance (RDS(ON)) too, and thus affect the static on-state power losses accordingly (PON). In this work, we use our physical reliability simulator Comphy to extract the threshold voltage drift of the transistor over time for various mission profiles for gate biases under device operation. Using the extracted ΔVth values from the simulator, we can reproduce the measured behavior of the DC-DC boost converter circuit. With the calibrated toolset, we can obtain the ΔVth values over a long operation time to predict the aged behavior of the circuit parameters employing Spice simulations, which could be beneficial for circuit design and lifetime prediction of the system.
Experimental Investigation on the Effect of EDM Wire Cut Parameters on the Formation of Cr23C6 in AISI 316 Steel
Authors: Muslimin Muslimin , Iqbal Muhammad , Ruswanto Sidiq , Triawan Farid , Mahmuddin Faisal
Published: June 2023

Wirecut Electrical Discharge Machining (WEDM) is a manufacturing process typically used to manufacture the machinery components in marine application with complex and challenging shapes and profiles. This study aims to investigate the effect of the EDM wire cut parameters on AISI 316 steel by analyzing the formation of Cr23C6. Cr23C6 can be formed in the grain boundary if the stainless steel is sensitized to a high temperature for too long. This compound becomes susceptible to intergranular corrosion than can reduce structural strength. The formation of Cr23C6 is of interest because this compound becomes vulnerable to intergranular corrosion than can reduce structural strength. The experimental variables in this study are pulse on time (i.e., 8 μs and 12 μs), servo voltage (i.e., 20 V and 30 V), and wire feed (i.e., 5 mm/min and 9 mm/min). The 0.2 mm brass wire is used during the EDM process. The result is then analyzed by surface roughness test, scanning electron microscope (SEM), and Energy-dispersive X-ray spectroscopy (EDS). As a result, the highest and lowest surface roughness values are 2.526 μm 1.771 μm, respectively. SEM results are seen in the pores of holes (craters) and fractures (microcracks). The result of EDS is the additions of elements Carbon (C) and copper (Cu), Oxygen (O). Increased carbon Chrom in HAZ sections allows for corrosion of grain limits.
Study on Subgrade Performance Evolution and Geocell-Reinforcement Effect of Subgrade in a Seasonal Frozen Area
Authors: Cheng Ming , Li Shuang , Luo Xing Wen , Lu Zheng , Yao Hai Lin
Published: June 2023

Seasonally frozen soil is widely distributed all over the world. The change of the mechanical properties of the soil in the seasonal frozen area under the actions of freezing-thawing cycles are studied in this paper. Research show that pavement rebound deflection and tensile stress in the pavement both increase with the increase of freezing-thawing cycles times, and the overall performance of the subgrade and the pavement decreases under the actions of freezing-thawing cycles. In order to improve the strength and rigidity of the subgrade in seasonal frozen area, geocell is used in the subgrade. Geocell plays a role of "net bag effect" in the subgrade. Despite undergoing the actions of freezing-thawing cycles, when the subgrade is reinforced with geocell, the pavement rebound deflection reduced by 17.3% compared with that in Condition A. The application of geocell improves the bearing capacity of seasonal frozen soil and the stiffness of the subgrade.
Thermomechanical and Dielectric Properties Relationship of Hybrid Carbon Black and Nano Silica Epoxy Composites
Authors: Othman Raja Nor Izawati Raja , Atira Fatim , Mohamad Noor Amieza
Published: June 2023

Multifunctional materials refer to the types of materials that possess enhanced mechanical, electrical, and thermal properties. In this work, nano silica and Carbon Black (CB) are added to epoxy polymer as an effort to improve the thermomechanical and dielectric properties of the composites. Filler loadings are varied from 0.1 wt.%, up till 5 wt.%. The thermomechanical properties are measured from Dynamic Mechanical Thermal Analysis (DMTA) while the dielectric properties are measured from Vector Network Analyser (VNA). The synergistic effects of combining both fillers (keeping them at 1:1 wt.% ratio) are also assessed. It was found that the value of glass transition temperature (Tg) increased from 56.85°C (neat epoxy) to 59.8°C (5 wt.% CB). The Tq values further increased to 64.7°C, for 5 wt.% hybrid fillers (2.5 wt.% silica + 2.5 wt.% CB), demonstrating the synergistic effects by employing dual fillers. By adding single and dual fillers, the values of storage Modulus, E’ remains almost constant for both glassy (40°C) and rubbery region (100°C), regardless of the loadings employed. The values of real permittivity, er’ was also measured for dual fillers in the frequency range between 300 kHz to 18 GHz. The highest value of er’ was 5.5 F/m, which was measured for both 1.5 mm and 2.0 mm sample thickness of 5 wt.% hybrid fillers (2.5 wt.% silica + 2.5 wt.% CB). This study highlights the thermomechanical and dielectric properties improvement of epoxy composites by incorporating dual fillers.
3C-SiC Island Growth on 4H-Sic Terraces: Statistical Evidence for the Orientation Selection Rule
Authors: Van Zeghbroeck Bart J. , Bobela David C.
Published: June 2023

3C-SiC islands were grown on atomically flat (111) 4H-SiC terraces and characterized by micro-Raman and FTIR. The islands initially have a triangular shape as defined by three {100} planes and over time evolve into hexagonal shaped islands. The triangular shape reveals the domain orientation of the island and is easily observed with an optical microscope. Examining 347 3C-SiC islands on 17 4H-SiC terraces we found that islands grown on the same terrace have the same domain orientation with 99.6% probability. The orientation of 3C-SiC islands grown on adjacent terraces was found to be close to random. This work confirms an orientation selection rule with high probability, suggesting that 3C-SiC can be grown without anti-phase domains or DPBs when grown on a single atomically flat 4H-SiC terrace, even when there are multiple nucleation sites.
Robustness of SiC MOSFETs under Repetitive High Current Pulses
Authors: Findenig Bettina , Sievers Markus , Voss Ingo , Aichinger Thomas
Published: June 2023

In this paper the robustness of state of the art SiC MOSFETs is analyzed under repetitivehigh current pulses far beyond the nominal values specified in their data sheets. SiC MOSFETs aremore and more used in many power electronics-based applications, such as industrial motor controlunits. During start-up events or load changes of such motors sudden high current pulses may occur.This imposed stress might trigger the drift of electrical parameters that can limit the operating rangeand lifetime of commercially available SiC MOSFETs. Nevertheless, the tested devices withstoodmillions of repetitive high current pulses several times higher than the rated nominal current withoutany signs of degradation.
Impedance and Dielectric Characterization of Epoxy Composites Containing Carbon Black and Carbon Nanotubes
Authors: Othman Raja Nor Izawati Raja , Ghani Afham Zaim , Osman Nurul Huda , Mohamad Noor Amieza
Published: June 2023

Research in improving dielectric materials is rapidly becoming more intense as there are higher demands for novel materials with the ability to store charges. In this work, impedance characterisation and dielectric properties of epoxy composites containing Carbon Black (CB) and a mixture of CB and Carbon Nanotube (CNT), kept at 1:1 wt.% is conducted. For both cases, the total number of fillers are varied from 0.5 wt.% to 6 wt.%. At 20 Hz, the values of dielectric composites, k was recorded to be 2050 for 6 wt.% CB, compared to k = 600, for composites containing dual filler (3 wt.% CB + 3 wt.% CNT). Further analysis revealed that the 6 wt.% sample (CB + CNT) exhibited higher ac conductivity at lower frequency, compared to sample containing only 6 wt.% CB. This could be due to the reason that CNT has more conductivity effects while CB has more storage or capacitive effects. Nyquist plot of impedance for both fillers also revealed the formation of semi-circular shapes for 5 wt.% and 6 wt.%; for both CB and CB + CNT fillers. However, formation of smaller semi-circular shapes is observed for CB + CNT, compared to CB only, indicating formation of conductive network in dual filler composites. This study highlights the potential of CB in enhancing mainly the dielectric properties of epoxy composites.
Evaluation of the Alkali-Aggregate Reaction Mitigation Potential of Alkali-Activated Fly Ash-Based Matrices Containing Different Reactive Aggregates
Authors: Kaefer Lucas , Dias Letícia Andreolli , Meinhart Alice Helena , Arnold Daiana Cristina Metz , Vargas Alexandre Silva , Morisso Fernando dal Pont , Oliveira Claudia Trindade
Published: June 2023

The present study evaluated the use of alkali-activated fly ash-based matrices containing different reactive aggregates (quartz, basalt and limestone) to mitigate the alkali-aggregate reaction (AAR). The fly ash activation was performed with sodium hydroxide (NaOH) solution, with a molar ratio (Na2O/SiO2) of 0.4. Reference matrices were prepared using Portland cement type V (ARI). All composites were prepared with a mass ratio of 1:2.25:0.47 (binder: aggregate: water/agglomerant ratio). The petrographic analyses allowed the identification of potentially reactive phases in the three studied aggregates. From the results, it was verified that the Portland cement-based matrices with basalt and quartz aggregates confirmed the reactivity of these aggregates. On the other hand, the reactivity of the same aggregates was not manifested in the CVAA-based matrices, classifying the basalt and quartz aggregates as innocuous in the alkali-activated matrix. Therefore, CVAA-based matrices mitigated AAR when using reactive basalt and quartz aggregates. However, the limestone aggregate did not show reactivity in the matrices studied.
Development of High Quality 8 Inch 4H-SiC Substrates
Authors: Yang Xiao Li , Pan Ya Ni , Gao Chao , Liang Qing Rui , Wang Lu Ping , Zhang Jiu Yang , Gao Yu Han , Ning Xiu Xiu , Zhang Hong Yan
Published: June 2023

8 inch 4H-silicon carbide (SiC) development faces challenges first from obtaining high-quality 8 inch SiC seed substrate, then reducing grown-in crystal residual stress and defects in the following crystal growth process. Here we report the diameter expansion process from 6 inch 4H-SiC seed substrate to 8 inch 4H-SiC crystal. Based on simulation and experimental results, it is deduced that an optimized radial temperature gradient (RTG) zone in the range of 0.10-0.12 °C/mm is essential for high-quality and efficient SiC crystal diameter expansion. According to the RTG calculation, diameter expansion process is designed and 8 inch 4H-SiC crystal as well as seed substrate is achieved. With the obtained seed substrate, high-quality 8 inch 4H-SiC crystal is developed and the following polished 4H-SiC substrate quality is characterized.
Conductive Glass with Simple Spray Deposition Method for Dye-Sensitized Solar Cell Application
Authors: Hayat Azwar , Dahlan Masbin , Putra Andi Erwin E. , Amaliyah Novriany
Published: June 2023

Dye-sensitized solar cells utilize a transparent conductive oxide (TCO) glass which is mainly Fluorine-doped tin oxide (FTO) for the working electrode and counter electrode. The TCO is one of the important parts of DSSC. TCO glass becomes the part that determines the price of mass production of DSSC. Low-cost TCOs with high conductivity and high light transmittance are required. In this study, We proposed a simple fabrication of TCO glass by spray deposition method of Tin (II) Chloride (SnCl2) on top of the lime glass substrate. Fabrication was started with 3 mm of Lime glass cleaned with distilled water and ethanol in sonication for 15 minutes and 10 minutes heating at 500°C. The variation of layer thickness was performed by multilayer spray using 2 mg SnCl2 and 5 ml ethanol mixture and then baked for 10 minutes at 500°C. The electrical conductivity, light transmittance, and roughness of the glass at one spray layer were 20 Ω/cm2, 87.1 %, and 0.010 µm respectively, and decrease along with the increase of the number of spray layers. A multimeter, UV-VIS Spectrophotometer, and 3D Measuring Laser Microscope are used to measure these parameters in this study. Compared to the properties of commercially available Fluorine doped Tin Oxide (FTO) glass, this method can be used as an alternative for conductive glass production for Dye-Sensitized Solar cells.
Sandstone composition and diagenesis of the Paskapoo Formation and their significance for shallow groundwater aquifer in the Fox Creek area, west-central Alberta
Authors: Lavoie D , Tremblay V , Rivard C
Published: June 2023

The shallow aquifer in the Fox Creek area is hosted by the Paleocene Paskapoo Formation. The formation consists of fluvial deposits with channel-filled high-energy sandstone cutting through fine-grained, low energy overbank sediments. Three internal members are
recognized, these members define three hydrostratigraphic units (two aquifers versus one aquitard). In fall 2022, three boreholes were drilled and cored. The succession is slightly dominated by sandstone with subordinate fine-grained sediments and thin coal intervals. The calcareous to
non-calcareous sandstone is either tight and well compacted or porous, friable to unconsolidated. The litharenite is composed of quartz, various types of rock fragments, chert, and feldspars. Detrital carbonates can be abundant. The post-sedimentation history of the sandstone recorded cementation
and dissolution events from near surface, through shallow burial and late tectonic exhumation. The events include early clay coatings on grains, dissolution of metastable minerals, cementation from calcite, kaolinite and minor chlorite and late near surface fault-controlled freshwater circulation
and dissolution. The late event resulted in friable to unconsolidated sandstone intervals.
Clear-Cell Renal Cell Carcinoma Metastasis into Pterygomaxillary Fossa - A Case Report
Authors: Migliorelli Andrea , Caranti Alberto , Manuelli Marianna , Bianchini Chiara , Ciorba Andrea , Pelucchi Stefano
Published: June 2023

Rationale:

The aim of this study is to describe a rare case of clear-cell renal cell carcinoma (ccRCC) metastasis to the pterygomaxillary fossa.

Patient Concerns:

A 54-year-old woman was referred to the Department of Otolaryngology due to right facial pain for the past six weeks.

Diagnosis:

ccRCC metastasis to the pterygomaxillary fossa.

Treatment:

The patient was treated by immunotherapy (Ipilimumab + Nivolumab) after multidisciplinary team evaluation.

Outcomes:

After 18 months, the patient is in good overall condition and the size of the skull base lesion has significantly reduced.

Take-Away Lessons:

ccRCC metastasis to the skull base and adjacent sites occur rarely. Most commonly, the presenting symptoms of these lesions are headache and diplopia for skull base metastases and epistaxis in case of sinusal involvement, according to the literature. When total resection of the metastasis is not feasible, tumour-targeted therapy may be used, as in the presented case. A multidisciplinary evaluation is recommended for the correct assessment and management of these patients.
Oral Manifestations of Malignant Immunoglobinopathy Hidden in Plain Sight - A Rare Case Report
Authors: Sharma Naresh Kumar , Singh Akhilesh Kumar , Hirani Mehul Shashikant , Krishnan Aswathi , Mahajan Arjun , Rajpoot Ravina
Published: June 2023

Rationale:

Radiolucent lesions over the angle–body region of the mandible are frequently difficult to diagnose but crucial to provide patient-centred care.

Patient Concerns:

An elderly female presented with a painless slow-growing swelling over her left lower face for one year, radiographically appearing as a well-defined unilocular radiolucency over the left body of the mandible.

Diagnosis:

Aspiration was negative, and biopsy was inconclusive. Further imaging, bone marrow biopsy, immune profile and serum electrophoresis confirmed the diagnosis of multiple myeloma.

Treatment:

She was referred to Medical Oncology for chemotherapy of lenalidomide, bortezomib and dexamethasone regimen cycle that was repeated every 21 days.

Outcomes:

There was no increase in swelling, and radiographically ‘punched-out’ lesions were reduced significantly.

Take-Away Lessons:

Maxillofacial clinicians should be attentive to the oral manifestations of underlying disease, have a high index of suspicion and start the treatment promptly to increase chances of a favourable outcome.
Occupational Therapy for a Child with Aplasia Cutis Congenita with Congenital Volkmann's Ischemic Contracture
Authors: Raikar Poornima , Vaidya Pratibha , Pawar Mangesh
Published: June 2023

Aplasia cutis congenita is a rare malformation characterized by focal or extensive absence of epidermis, dermis, and occasionally subcutaneous tissue. Congenital Volkmann's ischemic contracture is a rare neonatal compartment syndrome caused by intrauterine ischemia and external compression. This is a challenging case for an occupational therapist (OT) focusing on the improvement of hand deformities and function in a child. The objective was to assess the effectiveness of occupational therapy intervention in correcting contracture and improving hand movement. A 4-day-old male child from the neonatal intensive care unit, presented with absence of skin over the right forearm with contracture of right hand, ulnar deviation, and skin discoloration over right hand. Patient was assessed for movement, strength, and level of contracture. Treatment was focused on correcting contracture, improving hand movements, and maintaining skin integrity with the help of splinting and therapeutic exercises. A significant improvement was seen in finger ranges, wrist ranges, hand movements, and skin color. To conclude, splinting techniques helped to stretch out contracture and correct the position of the hand and improvement in hand function.
Caste and Occupation
Authors: Shetty Raviraj , Brahmabhatt Aditi , Nayar Shoba
Published: June 2023

Access to, and participation in, occupation is necessary for human health and well-being. However, humans exist in a socio-political-cultural context, which has the potential to systemically and structurally impede occupational engagement. Within the Indian milieu, caste is one dimension of the socio-political context impacting people's occupational participation, depriving them of the choice for agency in their occupation. We begin with a brief history of the caste system in India, before considering the effects of caste on everyday occupation within the domains of education, media, and manual scavenging. Drawing on these examples, it is argued that caste creates a context that perpetuates occupational injustice. Taking learnings from the anti-racism movement, suggestions are offered for how occupational therapists and researchers might bear witness to and respond to caste in their work, both with clients and in their own lives.
Black Seeds (Nigella sativa) Medical Application and Pharmaceutical Perspectives
Authors: Ferizi Rrahman , Ramadan Mohamed F. , Maxhuni Qenan
Published: June 2023

ABSTRACT

Among the various medicinal plants, the black seed is emerging as a miracle herb with a rich historical background, as much research has revealed its wide spectrum of pharmacological potential. In this collection of literature, we have encountered and presented the preclinical treatment, as alternative medicine of Nigella sativa in the prevention and treatment of various diseases, as well as those that continue to be discovered by contemporary actual scientific data. Research to date has confirmed the pharmacological potential of the seed of Nigella sativa, its oil and extracts of some of its bioactive constituents, which possess remarkable pharmacological activity, in vitro and in vivo against a large spectrum of diseases, and it has been found that the use of black seed is relatively safe. Black Seed has been extensively studied for its biological activity and therapeutic potential and has been found to possess a broad spectrum of activities. Clinical trial investigations into the therapeutic effects of Nigella sativa affect the hypoglycemic, hypolipidemic, and bronchodilator effects and have passed clinical trials and received the green light to allow the next stage of clinical trials toward therapeutic drug design. However, there is still room and multidimensional research needed for prospective clinical trials in certain groups of animals before they can be applied to humans as pharmaceutical therapies.
A Safety-Critical Decision-Making and Control Framework Combining
Machine-Learning-Based and Rule-Based Algorithms
Authors: Aksjonov Andrei , Kyrki Ville
Published: June 2023

While machine-learning-based methods suffer from a lack of transparency,
rule-based (RB) methods dominate safety-critical systems. Yet the RB approaches
cannot compete with the first ones in robustness to multiple system
requirements, for instance, simultaneously addressing safety, comfort, and
efficiency. Hence, this article proposes a decision-making and control framework
which profits from the advantages of both the RB and machine-learning-based
techniques while compensating for their disadvantages. The proposed method
embodies two controllers operating in parallel, called Safety and Learned. An RB
switching logic selects one of the actions transmitted from both controllers.
The Safety controller is prioritized whenever the Learned one does not meet the
safety constraint, and also directly participates in the Learned controller
training. Decision-making and control in autonomous driving are chosen as the
system case study, where an autonomous vehicle (AV) learns a multitask policy to
safely execute an unprotected left turn. Multiple requirements (i.e., safety,
efficiency, and comfort) are set to vehicle motion. A numerical simulation is
performed for the proposed framework validation, where its ability to satisfy
the requirements and robustness to changing environments is successfully
demonstrated.
What is the place of examples in the teaching of abstract algebra?
Authors: Stalder Julie
Published: June 2023

Teaching abstract algebra, seen as the study of structures and properties of structures, at a university level appears to be a challenge for both students and faculty. The professors in our study describe this passage through abstraction for the student body as a "killing game", an "impassable wall" or a "leap through abstraction". In this paper, based on a case study (Candy, 2020) we will investigate the choices of professors teaching abstract algebra at university. These professors were chosen because they teach abstract algebra at university in France, and they gave us access to their course corpus and agreed to be interviewed. In this article, we will choose to study in particular the teaching of the concept of ideal. An epistemological analysis will allow us to highlight its central role in the construction of abstract algebra. Then, using the anthropological theory of didactics (Chevallard, 1998), we will try to specify the place of examples and exercises in the praxis of the student body.

Enseigner l'algèbre abstraite, vue comme l'étude des structures et des propriétés des structures, à un niveau universitaire apparaît être un challenge pour les corps étudiant et professoral. Les professeurs de notre étude décrivent ce passage à travers l'abstraction pour le corps étudiant comme un « jeu de massacre », un « mur infranchissable » ou encore « un saut à travers l'abstraction ». Dans cet article, en appui sur une étude de cas (Candy, 2020) nous allons étudier les choix de professeurs enseignant l'algèbre abstraite à l'université. Ces professeurs ont été choisis car ils enseignent l'algèbre abstraite à l'université en France, de plus ils nous ont donné accès à leur corpus de cours et ont accepté d'être interviewés. Dans cet article, nous choisirons d'étudier en particulier l'enseignement du concept d'idéal. Une analyse épistémologique nous permettra de mettre en évidence son rôle central dans la construction de l'algèbre abstraite. Puis, en utilisant la théorie anthropologique du didactique (Chevallard, 1998), nous chercherons à préciser la place des exemples et exercices dans la praxis du corps étudiant.
Membangun Sikap Toleransi dalam Bingkai Pendidikan Kristiani bagi Anak Usia Dini dalam Keluarga
Authors: Supit Sugijanti
Published: June 2023

This study aims to examine a task to maintain harmonious cooperation between religions that arises from the many acts of intolerance that lead to a culture of arbitrariness, rebellion, chaos, and radicalism among the Indonesian people. The solution is to teach young children to be tolerant of their families. This study examines how Christian families help grow and build tolerance values in young children. The methodology used is a qualitative descriptive approach. The data obtained comes from a review of the selected bibliography and some analysis of research findings related to the urgency of the value of tolerance as a Christian religious education lesson in the family for early childhood.AbstrakPenelitian ini bertujuan untuk mengkaji suatu tugas untuk menjaga kerjasama yang harmonis diantara agama-agama yang timbul dari banyaknya tindakan intoleran yang mengarah pada budaya kesewenang-wenangan, pemberontakan, kekacauan dan radikal di kalangan bangsa Indonesia. Solusinya adalah dengan mengajarkan anak usia dini untuk menjadi toleran dalam keluarga mereka. Penelitian ini bertujuan mengetahui bagaimana keluarga kristiani membantu menumbuhkan dan membangun nilai toleransi pada anak usia dini. Metodologi yang digunakan adalah pendekatan deskriptif kualitatif.  Data-data yang didapat bersumber dari kajian daftar pustaka yang sudah diseleksi dan beberapa analisa dari temuan-temuan penelitian terkait urgensi nilai toleransi sebagai pembelajaran Pendidikan agama Kristen dalam keluarga bagi anak usia dini.
Deprem Büyüklüklerinin Benford Yasası’na Uygunluğu: Kahramanmaraş Depremleri Örneği
Authors: AYYILDIZ Nazif , KARADENİZ Erdinç , İSKENDEROĞLU Ömer
Published: June 2023

Bu çalışmada, deprem büyüklüklerinin Benford Yasası’na uygun olup olmadığının tespit edilmesi amaçlanmıştır. Bu amaç doğrultusunda 6 Şubat 2023 Kahramanmaraş depremleri incelenmiş ve 01.01.2023–27.02.2023 dönemi boyunca Türkiye’de gerçekleşen 14.565 adet depremin büyüklük verisi Benford Yasası rakamsal dağılımıyla karşılaştırılarak analiz edilmiştir. Analizden elde edilen sonuçlara göre, deprem büyüklüğü rakamlarının Benford Yasası’na uyum sağladığı ve çok küçük sapmalarla birlikte Benford Yasasını yakından takip ettiği belirlenmiştir. Söz konusu küçük sapmaların ise; büyüklük verilerinin tek ondalık basamağa yuvarlanarak açıklanmasından, yerin belirli derinliğinden daha ilerisinde oluşan çok küçük büyüklükteki depremlerin tespit edilememesinden veya mevcut verilerdeki çok küçük ölçüm hatalarından kaynaklanabileceği düşünülmektedir. Dolayısıyla, deprem oluşumlarının doğal süreçler sonucu ortaya çıktığı ve deprem büyüklüklerinin doğru olarak tespit edildiği söylenebilir.
Impact of Working Capital Management on the Profitability of Dutch Bangla Bank Limited (DBBL): A Comparative Analysis
Authors: Hoque Emdadul
Published: June 2023

A financial institution must check the impact of working capital management on profitability to determine its relative position based on earnings over time. This study has been conducted to identify the period that is more realistic in terms of profitability and working capital management for Dutch Bangla Bank Limited (DBBL) from 2009 to 2014 and 2016 to 2021. A variety of Dutch Bangla Bank Limited (DBBL) annual reports serve as the only main source for the study's secondary data. In this study, return on networking capital is considered a dependent variable, and quick ratio, return on equity, and return on assets are considered independent factors. Data were evaluated using informative statistics, the T-test, correlation, and the ANOVA Test (Multiple Regression Analysis). Those test results demonstrate that return on equity has no effect and has a negligible effect on the return on net working capital from 2009 to 2014 and from 2016 to 2021, whereas the return on assets has a significant positive impact on net working capital from 2009 to 2014 and from 2016 to 2021. Additionally, the current ratio had no impact on the return on net working capital from 2009 to 2014, but it had a very beneficial impact starting in 2016 and 2021. The 2015–2021 phases had more changes in the current ratio, return on equity, and return on working capital than the 2014–2014 phases did. The 2009–2014 phases saw more strategic and careful working capital management than the 2015–2021 phases.
THE LANGUAGE OF THE MEDIA (ON SOME ASPECTS OF THE STANDARD AND SUBSTANDARD FROM THE POINT OF ACCENTUATION)
Authors: Lončar Raičević Aleksandra
Published: June 2023

The relationship between the standard as a special idiom, a subsystem of a language, and its additional idioms (dialects, jargon, colloquial language) is most often observed in the context of dynamic and innovative processes in the domain of language use. One of the most suitable and reliable language corpora for studying the stability of the language system and the changes that occur in it is media discourse. It represents reliable material for assessing the character of those changes, for monitoring not only development tendencies but also possible consequences. In the sphere of language use in the social context, the orthoepic norm itself plays an important role, i.e., accentuation, which represents a group of acoustic, the so-called prosodic or suprasegmental properties of the human voice such as length, pitch and loudness. In this paper, we deal with the issues of the use of standards, i.e., substandards in electronic media from the point of accent, because it is a fact that the way in which speakers in electronic media - presenters, journalists, announcers - shape certain contents could, without a doubt, strongly shape public opinion and also significantly influence the speech and language culture of a wide audience.
Biological availability of 137Cs and 90Sr in soddy-podzolic soils in the long period of the accident at the Chernobyl NPP
Authors:   International Sakharov Environmental Institute, Belarusian State University, Tsybulka Mikalai M. , Putyatin Yury V. ,   Institute for Soil Science and Agrochemistry, National Academy of Sciences of Belarus
Published: June 2023

The content of 137Cs and 90Sr forms in soddy-podzolic automorphic and gleyic soils of different textures (loamy, sandy loamy, sandy) was studied. It has been established that over a long post-accident period, the physical and chemical forms of 137Cs and 90Sr have been transformed in soils, and a dynamic balance has come in their content. 137Cs compounds have undergone non-exchange fixation, and their content in the form available to plants is currently an insignificant fraction -5-15 %. 90Sr compounds, on the contrary, are predominantly in easily accessible forms, which make up from 60 to 75 % in soddy-podzolic soils, 67 % on average. The transfer factor of 137Cs, depending on the granulometric composition of soils, decreased on average in grain crops by 3.0-6.7 times, in potato tubers - by 5.0-7.5 times. The parameters of 90Sr intake into plants decreased most intensively in the first 1-2 years after the accidental fallout, which was mainly due to the transformation of its water-soluble compounds into exchangeable forms, and over the past 30-36 years they have not practically decreased. Due to the high mobility of 90Sr in the soil, the transfer factor into agricultural crops are significantly higher compared to 137Cs - into grain crops by more than an order of magnitude, into potatoes - by an average of 5 times. Currently, the bioavailability parameters of 137Cs and 90Sr have stabilized and no significant changes are observed. Therefore, based on the current situation and the transfer coefficients of these radionuclides from soil to plants, it can be concluded that the main problems associated with obtaining standard clean crop products can occur on soils contaminated with 90Sr.