bluuebunny/crossref_metadata_2025 huggingface dataset:
Economic Policy Uncertainty, Accounting Robustness and Commercial Credit Supply - A Big Data Analysis Based on Accounts Receivable
Authors: Guo Lei , Guo Xujie
Published: December 2023

In this paper, a two-dimensional panel data model of economic policy uncertainty is investigated based on the individual fixed effects of panel quantile regression, and a nonparametric panel model with individual fixed effects is established. The unfolding of nonparametric penalized spline and the introduction of Bayesian in stratified quantile are utilized to construct regression models applicable to accounting robustness, respectively. In the empirical study, the economic policy uncertainty index, accounting robustness and commercial credit supply are measured respectively. The annual data of China’s Shenzhen and Shanghai A-share listed companies during the period from 2012 to 2021 were selected as the research basis, and Bayesian quantile regression was made on the basis of correlation analysis. The coefficient of commercial credit supply is found to be -0.0821, and the variable RD1 is negatively correlated with economic policy uncertainty. This regression result confirms hypothesis H1 of this paper, suggesting that private firms invest less in innovation when economic policy uncertainty is higher. In the test of economic policy uncertainty by type, the regression coefficients of RD2, EPU, and SIZE are negative, respectively -0.0368, −0.2124, and -0.1458, which indicates that fiscal policy, monetary policy, and exchange rate and capital account policy uncertainty are negatively correlated with the supply of business credit to enterprises. Based on this correlation, this study provides guidance for the development of business credit for enterprises.
On the Traveling-Creativity Relationship: Effects of Openness to Experience, Cultural Distance, and Creative Self-Efficacy
Authors: Wojtycka Lidia
Published: December 2023

It is a common belief that travel allows us to grow, get inspired, and reach fulfillment. Travels offer a highly conducive combination of cognitive resource maximization, positive emotions, and, most importantly, new, out-of-ordinary experiences, enabling creativity to flourish. However, for travel to affect creativity in any way, some conditions must be met. Of key importance are characteristics of travel destinations and travelers’ Openness to experience. This study explores the creativity-traveling relationship by analyzing occurring interactive, mediating, and correlational effects. Also, it compares how traveling and living abroad predict creativity to address the ongoing debate. The analysis comprising 136 participants demonstrated that the traveling-creativity link is stronger among people low on the Openness trait. Further, an indirect effect of creative self-efficacy in the relationship between traveling and creativity was observed. These findings suggest the potential of facilitating creativity through traveling experiences among some groups, but at the same time, they call for more in-depth research on the topic.
Who are Lead users?
Authors: Boisadan Andréa , Buisine Stéphanie
Published: December 2023

Lead users are invaluable resources to generate user-centric radical innovation, but they remain difficult to detect and recruit in the general population. Lead userness, which draws both on the ability to identify unstated customer needs and find creative solutions to those needs, has been conceptualized as domain-dependent: this means that a lead user may generate innovation only in a specific domain for which they are an expert. In the present study, we aim to better understand the extent to which lead userness is a domain-dependent state (as elaborated in the literature) or a domain-independent trait. Following a questionnaire survey with 126 participants, we managed to reliably assess the empathetic side of lead userness (ability to identify needs) and showed that it was related both to domain-dependent characteristics (competences) and domain-independent trait (emotional intelligence). These results open up new avenues for implementing the lead user method in innovation projects.
Calling out for the Possible! Is it Our Chance to Make it Right?
Authors: Mangion Margaret , Valquaresma Andreia
Published: December 2023

In today’s world, humanity is confronted with an increasing number of complex challenges. The Anthropocene’s core tenet, the impact of humans on the world, leads us to aspire to a more sustainable future, putting the possible at the centre of societal development. Educational contexts provide a unique platform for future citizens to engage with the possible, calling for the advancement of strategies that can intentionally contribute to expanding opportunities for embracing the possible. This commentary explores how contemporary challenges can be a driving force to redesign educational contexts to effectively embed the possible in their practices and pedagogies, in an effort to raise awareness and elicit a sense of urgency about the importance of the possible as a field of study.
Automatic simplification of the geometry of a cartographic line using contractive self-mapping – illustrated with an example of a polyline band
Authors: Bac-Bronowicz Joanna , Banasik Piotr , Chrobak Tadeusz
Published: December 2023

The present article is another attempt to adapt map geometry to automatic digital cartography. The paper presents a method of digital polyline generalisation that uses contractive self-mapping. It is a method of simplification, not just an algorithm for simplification. This method in its 1996 version obtained a patent entitled “Method of Eliminating Points in the Process of Numerical Cartographic Generalisation” – Patent Office of the Republic of Poland, No. 181014, 1996. The first results of research conducted using the presented method, with clearly defined data (without singular points of their geometry), were published in the works of the authors in 2021 and 2022.

This article presents a transition from the DLM (Digital Landscape Model) to the DCM (Digital Cartographic Model). It demonstrates an algorithm with independent solutions for the band axis and both its edges. The presented example was performed for the so-called polyline band, which can represent real topographic linear objects such as rivers and boundaries of closed areas (buildings, lakes, etc.). An unambiguous representation of both edges of the band is its axis, represented in DLM, which can be simplified to any scale. A direct consequence of this simplification is the shape of the band representing the actual shape of both edges of the object that is classified in the database as a linear object in DCM.

The article presents an example performed for the so-called polyline band, which represents real topographic linear objects (roads, rivers) and area boundaries. The proposed method fulfils the following conditions: the Lipschitz condition, the Cauchy condition, the Banach theorem, and the Salichtchev’s standard for object recognition on the map. The presented method is objective in contrast to the previously used approximate methods, such as generalisations that use graph theory and fractal geometry, line smoothing and simplification algorithms, statistical methods with classification of object attributes, artificial intelligence, etc. The presented method for changing the geometry of objects by any scale of the map is 100% automatic, repeatable, and objective; that is, it does not require a cartographer’s intervention.
In Search of the Best Technological Solutions for Optimal Biobutanol Production: A Multi-Criteria Analysis Approach
Authors: Berzina Indra , Mika Taras , Spalvins Kriss
Published: December 2023

Rising energy demands and the environmental impact of fossil fuel combustion have promoted a growing interest in alternative fuel sources. Biobutanol is a promising biofuel that can be used as a partial or complete substitute for petrol in unmodified internal combustion engines. It can be produced through a microbiological process called ABE fermentation. Currently, its production is uncompetitive in the market, but researchers are still working on solutions to improve the technology. This paper used a multi-criteria decision analysis method to evaluate different alternatives for biobutanol production: microorganism strain, agro-industrial waste substrate as process feedstock, bioreactor type and extraction method. It was determined that C. beijerinckii and C. saccharoperbutylacetonicum have great potential for being used for efficient biobutanol production. Cheese whey is a promising residue for being used in the fermentation medium. Other residues evaluated in the paper gained similar results as being “close to ideal”. Fed-batch with immobilized cells was chosen as the most promising fermentation method. It showed the greatest prospects as an optimal way to produce butanol. And, finally, adsorption and liquid-liquid extraction methods were identified as the most promising for ABE product extraction in comparison to others. Identified combinations of optimal solutions for microorganisms, fermentation methods, substrates and extraction techniques should be further evaluated in the laboratory setting.
Translanguaging in Teaching and Learning of English at University Level: The Perspectives of Ukrainian Students and their Teachers
Authors: Cvilikaitė-Mačiulskienė Jurgita , Daukšaitė-Kolpakovienė Aurelija , Gvazdikaitė Gabrielė , Linkevičiūtė Eglė
Published: December 2023

Classrooms at all levels of education are becoming more diverse, as they include more and more multilingual and multicultural students. Their teachers start understanding that, especially in foreign language classes, monolingual approaches to teaching and learning are not effective anymore, and search for other pedagogical techniques and practices that would involve their students’ linguistic repertoires as an asset in their classes. This study aimed to learn about the attitudes towards and experiences of the use of other languages in the English classroom by including the perspectives of English teachers and their Ukrainian students who, having fled their home country due to the war against Ukraine or having chosen to participate in student exchange, came to study at Vytautas Magnus University in Kaunas, Lithuania. Two online questionnaires including open and closed ended questions were used to gather data. Thus, the study was both quantitative and qualitative. Even though several literature review sections in this article describe a switch from monolingual to a more holistic paradigm that includes translanguaging, this and other terms employed to describe the use of other languages were not introduced to the research participants. The English teachers’ and their Ukrainian students’ attitudes towards and experiences of the use of other languages in the English classroom are first looked at separately and then compared in the concluding section. The findings revealed that both Ukrainian students (58.3%) and teachers (84.2%) have experience of other languages being used in their English classroom. They also agree that translation into the language that students understand is used as a strategy helping the students to understand grammar and vocabulary, yet the students indicated gesturing as a strategy used to explain unknown vocabulary. Other strategies related to the use of other languages were also mentioned and described. The teachers and the students pointed out that Russian and Lithuanian were the most frequently employed other (than English) languages in their English classroom, even though the teachers believed they used mostly Russian, whereas the students believed their teachers mostly used Lithuanian.
Analysis of Foreign Language Teachers´ Attitudes Towards Digital Teaching in the European Union Countries
Authors: Klimova Blanka , Pikhart Marcel , Fronckova Katerina , Sanchez-Stockhammer Christina , Stukalina Yulia , Iruskieta Mikel , Dağdeler Kübra Okumuş , Lejot Eve , Parmaxi Antigoni , Rodríguez Rocío Bartolomé , Pareja-Lora Antonio
Published: December 2023

In the present era, both learning and teaching, including foreign language learning (FLL) and teaching, are being radically influenced by a massive implementation of digital technologies. The purpose of this study is to analyze foreign language teachers’ attitudes towards the use of technologies in foreign language teaching across Europe and to identify clear implications for their efficient implementation. The methodology of this study includes a mixed-method research design (quantitative and qualitative) with a survey conducted with altogether 234 foreign language (FL) teachers from different universities across Europe. The results clearly show that FL teachers generally have a positive attitude towards the use of technologies in their classes and that they frequently use them in their teaching since they can make students more engaged in learning a foreign language. In fact, the FL teachers have always been at the forefront of innovative approaches to teaching and learning. In spite of this, they admit that they would welcome more professional support from the management of their home institutions and demand training in the use of new technologies. The results of the research also indicate that special attention should be paid to the lack of personal contact, students' reactions, and the expression of emotions, which is difficult and almost impossible to achieve through the use of digital media. These findings are unique since they aim specifically at current FL teachers´ attitudes and needs across Europe and can be utilized by stakeholders and FLL course designers. Moreover, they can also be extended to a larger scale, i.e., the global level.
Thermal Operating Window in Selective Laser Melting Processes
Authors: Kozak Jerzy , Zakrzewski Tomasz , Witt Marta , Dębowska-Wąsak Martyna
Published: December 2023

Selective laser melting (SLM) is one of the most effective methods of additive manufacturing (AM). It is used to manufacture products with very complex geometries using a wide range of materials. Practical process conditions are limited by the occurrence of undesirable melting instabilities that degrade the surface quality and lead to product defects. These disadvantages are related to the thermal limitations of the SLM process. The lower thermal limit is due to the need to completely melt the powder layer and partially remelt the underlying layer again to ensure proper bonding between the layers. Exceeding the upper thermal limit in the molten metal pool may cause extensive evaporation, boiling and ejection of molten metal droplets outside the melting area. The article presents an approach and methodology that enable the determination of thermal limits and the operating window of SLM/selective laser sintering (SLS) processes in a relatively simple way. The studies have been performed using various settings of SLM process parameters. The usefulness of the preliminary determination of thermal limitations and approximate prediction of operating window of SLM has been confirmed experimentally and by more accurate computer simulation.
Automated Eddy Current System for Aircraft Structure Inspection
Authors: Lysenko Iuliia , Kuts Yurii , Petryk Valentyn , Malko Volodymyr , Melnyk Andrii
Published: December 2023

Aircraft part diagnostics are crucial during both production and maintenance, with eddy current nondestructive testing (ECNDT) being the method of choice due to its cost-effectiveness, informativeness, productivity, and reliability. ECNDT excels regardless of surface condition or coatings. It’s employed for diagnosing various aircraft components, necessitating diverse transducer types, excitation modes, and advanced signal processing. To improve ECNDT, this article explores integrating harmonic and impulse excitation modes in a single tool to enhance informativeness. Building upon a wireless eddy current system, the authors propose a comprehensive method for processing and displaying information suitable for object condition monitoring systems. The system includes automated transducer mode control and experimental data processing algorithms. The constant expansion of tested objects and new materials underscores the need to enhance the theoretical foundations of eddy current non-destructive testing, refine signal processing techniques, and identify informative signs. This demands the development of new automated ECNDT tools, and this article offers a promising avenue for improvement. The results include model and experimental tests of system components, showcasing the potential of this approach to enhance ECNDT effectiveness, automation, and informativeness in the realm of aircraft part diagnostics.
Improving Strapdown Inertial Navigation System Performance by Self-Compensation of Inertial Sensor Errors
Authors: Chernyak Mykola , Kolesnyk Vadym
Published: December 2023

Microelectromechanical systems (MEMS)-based strapdown navigation systems offer advantages such as small size, low cost and minimal power consumption. However, MEMS sensors are prone to significant low-frequency noise and poor bias repeatability, which can lead to navigational errors over time. These errors make them unsuitable for autonomous navigation applications, even with frequent recalibration. One way in which to solve this problem is by using the rotation modulation (RM) method. This approach is widely recognised but has only been successful with precise laser and fiber optic gyroscopes equipped with precise rotating platforms. This article focuses on the potential of adapting the RM method for the case of inexpensive MEMS sensors that can significantly improve navigation performance, while maintaining the benefits of microelectromechanical technologies. Potential issues of implementation were discussed, and corresponding requirements were formulated. The proposed optimal computation scheme was verified during static tests of the developed inertial measurement unit (IMU). Further steps in studying the adaptation of the RM method for MEMS sensors have also been outlined.
Numerical Modelling of Static Aeroelastic Deformations of Slender Wing in Aerodynamic Design
Authors: Bugała Pamela , Sznajder Janusz , Sieradzki Adam
Published: December 2023

The article presents the validation of two methods for analyzing the aerodynamic properties of the aircraft wing concerning aeroelastic effects. The first method is based on low-cost computational models (Euler–Bernoulli Beam Model and Vortex Lattice Method [VLM]). Its primary objective is to estimate the wing’s deformation early in the design stages and during the automatic optimization process. The second one is a method that uses solutions of unsteady Navier–Stokes equations (URANS). This method suits early design, particularly for unconventional designs or flight conditions exceeding lowfidelity method limits. The coupling of the flow and structural models was done by Radial Basis Functions implemented as a user-defined module in the ANSYS Fluent solver. The structural model has variants for linear and nonlinear wing deformations. Features enhancing applicability for real-life applications, such as the definition of deformable and nondeformable mesh zones with smooth transition between them, have been included in this method. A rectangular wing of a high-altitude long-endurance (HALE) aeroplane, built based on the NACA 0012 profile, was used to validate both methods. The resulting deflections and twists of the wing have been compared with reference data for the linear and nonlinear variants of the model.
IDENTIFIKASI MAKROZOOBENTOS SEBAGAI BIOINDIKATOR KUALITAS PERAIRAN DI PANTAI TELUK BENOA, BADUNG
Authors: Sutrisnawati Eka Ari , Arthana I Wayan , Windia Adnyana Ida Bagus
Published: December 2023

Utilization of coastal waters for aquaculture activities or for other activities provides positive value for human welfare but can also provide the potential for reducing water quality. The decline in environmental quality can be seen from changes in components such as biology, chemistry, and beach physics. Changes in chemical and physical components cause sediment to decrease, which will affect the life of marine biotas, such as the community structure, especially the slow-moving and relatively settled biota on the bottom of the waters (macrozoobenthos). Macrozoobenthos are very appropriate to be used as an indicator of changes in water quality due to their benthic nature which is relatively silent or has low mobility so it is strongly influenced by the environment. The purpose of the study was to determine the structure of the macrozoobenthos community and the condition of seawater quality. There were 25 species of gastropods and 3 other classes. The macrozoobenthos species diversity index on the Benoa Bay Coast showed a moderate level of diversity with the highest value of 2.4576. The uniformity index at each station ranges from 0.0894 – 0.5337. The value of the dominance index ranges between 0.000004-0.7656. Based on the relative abundance, the macrobenthos community is dominated by the Gastropod class. The temperature values ??at each station were relatively the same, ranging from 29.3°C– 30.8°C, and the pH was in accordance with quality standards for macrozoobenthos growth. Some indicators of water quality are still below the quality standard threshold, but the concentration of phosphate (PO4) at all locations is already above the predetermined quality standard of 0.015 mg/L?.

Keyword: Macrozoobenthos; Bioindicator; Benoa Bay; Bali
Numerical Schemes and Stability Analysis for Fractional Models of Transient Uni- and Bidimensional flow in Petroleum Reservoirs
Authors: Do Carmo Wesley Pardinho , Santos Alexandre Ferreira , Lenzi Marcelo Kaminski , Fortuny Montserrat , Lenzi Ervin Kaminski
Published: December 2023

Objective: To propose a modeling for the flow in oil reservoirs using Caputo’s definition of fractional derivative applied to the spatial coordinate of the problem. Furthermore, delimit a region of numerical stability for the explicit method of solving the model equations.
 
Methodology: Starting from the material balance in a differential control volume and the generalized Darcy's law, and coupling it with an equation of state, models describing flow in porous media were derived. A numerical solution scheme using an explicit discretization was proposed. For this purpose, the L1 method for approximating spatial fractional derivatives and finite difference approximation for temporal derivatives were employed..
 
Results and Discussion: Through the Von Neumann stability analysis, it was observed that the explicit solution schemes for the models are conditionally stable and dependent on the order of the fractional derivative. Additionally, numerical stability regions were constructed for one and two-dimensional transient schemes, revealing that the one-dimensional scheme is stable for , and the two-dimensional scheme is stable for
 for all derivative orders between 0 and 1.
 
Implications of the research: Historically, flow models in petroleum reservoirs have been based on the application of Darcy's law; however, its use is limited due to some constraints. Recently, fractional calculus has played a significant role in generalizing and obtaining more accurate models in various application areas. In this context, Darcy's law has been generalized, allowing for the derivation of fractional models that are more suitable for describing flow in porous media. These models, in general, are solved using a numerical method, and it is crucial to understand the stability region of the method for their resolution.
The Relationship between the Learning Environment and Student Learning Outcomes SDN 002 Gugus VI South Bontang Bontang City
Authors: Agus Salim Nur , Afdal Afdal , Indriani Yoppi
Published: December 2023

This research aims to analyze the relationship between the learning environment and student learning outcomes at SDN 002 Gugus VI South Bontang, Bontang City. This research is quantitative research with a descriptive research type. Population is a generalization area consisting of Objects/subjects that have certain qualities and characteristics that researchers apply to study and then draw conclusions. (Sugiyono, 2016) The population in this study were all school residents at SDN 002 Gugus VI South Bontang, Bontang City, totaling 600 students. This research was carried out at SDN 002 Gugus VI South Bontang, Bontang City, East Kalimantan, Indonesia. The research period will start from April 2018. The results of this research show that the learning environment has a relationship with student learning outcomes at SDN 002 Gugus VI Bontang Selatan, Bontang City, meaning that if the student learning environment is good, it will encourage the learning outcomes obtained by students to be better, whereas if If the student learning environment is low, it will also encourage student learning achievement to be low.
Increasing Interest and Learning Outcomes in Mathematics Using the Problem Based Learning Method in Class II of SDN 016 Sungai Pinang Samarinda
Authors: Agus Salim Nur , Rizqi Syafrina  , Alfionita Damayanti
Published: December 2023

This research aims to increase student interest and learning outcomes in Mathematics subjects through the Problem Based Learning learning method in class II. SDN 016 Sungai Kunjang Samarinda 2017/2018 Academic Year. The method used in this research is Classroom Action Research (PTK), which is carried out in 3 cycles, with three meetings in each cycle. The research subjects were 38 class II students consisting of 19 men and 19 women in the second semester of the 2017/2018 academic year. From the results of the questionnaire, student interest in learning before carrying out the research was 33.80%. It increased at the end of the research implementation by 54.36%. In comparison, the average results of student observations in cycle I was 10.95%, cycle II was 15.68%, and increased in cycle III by 21.18%, for the average student learning outcomes in pre-cycle was 62.79, cycle I was 68.42, cycle II was 73.64 and increased in cycle III was 78.97 with learning completeness is 100%. Based on the above analysis of the results of research conducted at SDN 016 Sungai Pinang Samarinda, the Problem-Based Learning Method can increase interest and learning outcomes in Mathematics for class II students.
Effectiveness of Implementing the 2013 Curriculum at SDN 010 Sungai Kunjang
Authors: Nur Agus Salim  , Gamar Al Haddar  , Yunita Mayasari
Published: December 2023

This study aims to find out the effectiveness of the implementation ofcurriculum 2013 in SD Negeri 010 Sungai KunjangSamarinda. A qualitative approach was applied to answer the research problem. The researcher involved school principal, teachers and first, second, fourth and fifth grade students as the research subjects through snowball sampling. Meanwhile, the research object was the implementation of curriculum 2013. Methodology triangulation was applied to check the trustworthiness of data, by comparing results of interview, result of observation and result of questionnaire. The data crosschecking was also conducted between sources, such as the school principal and the teachers, aboutthe implementation of curriculum 2013 in the research setting. Based on the data analysis, it is found that 1) the teachers havedocuments of lesson planning such syllabus and lesson plans which made independently through class KKG; 2) the teachers had implemented the learning process very well as it had been planned. However, some teachers have not had skill in information and technology so that they have difficulties in inputting data for students’ progress report; 3) the number of book for curriculum 2013 and the number of students are considered in adequate number; 4) the teachers had conducted the opening section, main section and closing section during the learning process; 5) the school principal had supervised the class at the beginning of the learning process.
The Use of WhatsApp for Speaking Activities: Teacherâ€™s Voices at Islamic Junior High School
Authors: Marzulina Lenny
Published: December 2023

Background:

The form of information technology development that can be used as a learning medium during Covid 19 Pandemic is WhatsApp. This WhatsApp is widely used to communicate, both interpersonal communication and group communication. Thatâ€™s why teachersâ€™ perceptions on the use of WhatsApp in speaking activities needed to be revealed.

Methodology:

The qualitative method with a case study research design was used in this study. The participants of this study were two teachers of English taken by using total sampling technique. The data obtained from interview were analysed by using thematic analysis.

Findings:

It was found that (a) WhatsApp could build the studentsâ€™ interest towards English; (b) WhatsApp made the teachers easier to share speaking materials by using WhatsApp; (c) WhatsApp made the teachers easier to control the class. Meanwhile, the limitations were found that (d) WhatsApp did not build the studentsâ€™ confidence in speaking English; (e) WhatsApp did not promote studentsâ€™ independence in learning speaking; (f) WhatsApp did not create enthusiast atmosphere among students; (g) WhatsApp made the students became less active in learning English; (h) WhatsApp did not make the students pay attention to learning English; and (i) WhatsApp persuaded the students to copy-paste the task.

Conclusions:

Both benefits and limitations were found on the use WhatsApp in speaking activities of as perceived by the teachers.

Originality:

This study tries to find out teachersâ€™ perceptions on the use of WhatsApp in speaking activities during COVID-19 Pandemic as never been conducted.

Keywords             : Teachersâ€™ Perceptions, WhatsApp, Speaking Activities
Interventional radiology perception among medical students in Riyadh, Saudi Arabia
Authors: Alazzam Authors: , Alamer Sarah , Aleid Lama , Alakeel Mohammad , Alanazi Boshra , Altowairqi Abdullah , Alshebaily Abdulilh , Al-Asiri Yahya , Kasule Omar
Published: December 2023

Background: Interventional Radiology (IR) is a specialized field within radiology that diagnoses and treats a variety of conditions through minimally invasive surgical procedures involving various radiological techniques. In recent years, the role of IR has expanded to include a range of organ systems, leading to an increased demand for this specialty. The present study aimed at investigating the perceptions of interventional radiology (IR) as a specialty among medical students and medical interns in Riyadh, Kingdom of Saudi Arabia (KSA).

Methods: This study employed a cross-sectional design, targeting male and female medical students in Riyadh City, KSA, in January 2023. We utilized a questionnaire for face-to-face and phone interviews to assess their knowledge about IR. The data were cleared and entered through the Statistical Package for the Social Sciences (SPSS).

Results: A total of 314 students participated in the study, with 49% in the preclinical years and 51% in the clinical years. Forty-two percent reported that they had poor information and knowledge about IR. Only 28% of students were planning to take an elective and radiology rotation, while 27% said they would consider a career in IR. Among the 73% of participants who would not consider a career in IR, the highest reasons, in order, were \"I do not find it interesting\" (45%), \"Radiation exposure\" (14%), and \"The lifestyle is not for me\" (12%). Regarding training, 48% thought that an IR must complete a residency training program in both radiology and surgery, and only 36% of the students believed that an IR must finish training in radiology.

Conclusion: Our findings reveal that the perception and exposure to IR among medical students and interns are generally poor. This has a direct influence on the students\' decision regarding IR as a career.
ANALISIS KELAYAKAN FINANSIAL USAHA KERIPIK “KELJA NGOCEAE” DI SIDOARJO
Authors: Wulandari Sekar Ayu , Hasanuddin Slamet Ahmad Haris , Mutmainah Dini Nafisatul , Ariyola Nopi , Rizqullah Rafly , Damayanti Risma
Published: December 2023

Tanaman kelor dan jahe memiliki potensi besar untuk diolah menjadi produk olahan makanan. Meninjau potensi kandungan gizi dari daun kelor dan jahe potensi hasil olahan yang dapat dilakukan yaitu mengolahanya menjadi keripik yang diberi nama Kelja Ngoceae. Pemilihan olahan menjadi keripik dikarenakan produk ini banyak diminati oleh berbagai kalangan. Penelitian ini bertujuan untuk menganalisis kelayakan finansial dalam pengembangan usaha keripik Kelja Ngoceae. Penelitian ini menggunakan metode studi kasus dimana metode ini merupakan bentuk penelitian yang dapat dilakukan secara kuantitatif maupun kualitatif dengan pendekatan kuantitatif deskriptif dengan mengukur kriteria penilaian kelayakan usaha berdasarkan kesehatan keuangan usaha. Tujuan analisis finansial yang dilakukan meliputi, analisis total biaya, analisis pendapatan atau pendapatan bersih, analisis tingkat efisiasi usaha (R/C ratio), Payback Period (PP), Net Present Value (NPV), Net Benefit Cost Ratio (Net B/C Ratio), dan Internal Rate of Return (IRR). Berdasarkan hasil penelitian diperoleh total produksi yang dibutuhkan untuk memproduksi kelja sebesar Rp. 9.000.000, kemudian biaya variabel per tahun sebesar Rp. 29.920.800, pendapatan yang diperoleh per tahun sebesar Rp. 33.079.200. Hasil analisis nilai Payback Period pada usaha keripik KelJa Ngoceae yaitu 1,9 tahun. Perhitungan tersebut menunjukan bahwa investasi yang dikeluarkan dalam pengembangan keripik Kelja Ngoceaea dapat mengembalikan modal dalam kurun waktu 1,9 tahun. Kemudian berdasarkan analisis kelayakan usaha diperoleh nilai R/C sebesar 1,94, B/C rasio sebesar 1,548, NPV sebesar Rp 35.085.479, dan IRR sebesar 24%. Nilai yang diperoleh tersebut menunjukan bahwa usaha keripik Kelja Ngoceae layak untuk dijalankan.
POTENSI LAHAN TANAMAN KOPI ROBUSTA DI KECAMATAN LOBU KABUPATEN BANGGAI
Authors: Pelia Lani , Sariani Sariani , Ladonu Ilham , Simayang Wisnu
Published: December 2023

Tanaman Kopi saat ini merupakan komoditas tanaman perkebunan yang diharapkan dapat dilakukan alternatif manajemen praktis yang tepat dikalangan petani, sehingga pengembangan tanaman kopi robusta (Coffea robusta L) harus berdasarkan potensi lahan yang diestimasi melalui sifat dan karakternya. Sehingga perlunya mengetahui kesesuaian lahan, luasan dan factor pembatas dalam pengembangan tanaman kopi robusta di Kecamatan Lobu Kabupaten Banggai. Penelitian ini menggunakan atas dasar nilai ciri lahan merujuk pada sistem klsifikasi FAO (1976). Hasil penelitian menunjukkan pada kesesuaian lahan aktual tanaman kopi robusta Kecamatan Lobu diperoleh pada titik 1, 2, 3 dan 4 tergolong “tidak sesuai”, hal ini karena adanya factor pembatas tekstur (titik 1) dan curah hujan (titik 1,2,3 dan 4) yang tergolong rendah. Maka perlunya upaya perbaiakan dengan melakukan pembuatan saluran irigasi agar air dapat memenuhi kebutuhan tanaman kopi robusta (Coffea robusta L), akan tetapi untuk factor pembatas tekstur tidak dapat dilakukan perbaikan. Sehingga diperoleh potensial lahan tanaman kopi robusta Kecamatan Lobu pada titik 1 yaitu tidak sesuai (N), pada titik 2, 3 dan 4 tergolong S3 (sesuai marginal). Dengan mempertimbangkan faktor pembatas dan upaya perbaiakn maka, arahan untuk pengembangan tanaman kopi robusta (Coffea robusta L) dapat dilakukan pada wilayah titik 2, 3 dan 4 dengan luas yaitu 3.137,12 ha.
PENGARUH MEDIA SOSIAL DALAM MENGUBAH KEINGINAN PEMBELIAN MILENIAL MENJADI KEPUTUSAN PEMBELIAN PADA PRODUK HIJAU
Authors: Anisah Nor , Wahidah Wahidah , Wirdan Wirdan , Ditahardiyani Prima
Published: December 2023

Tingginya penggunaan media sosial telah mengakibatkan terjadinya perubahan yang signifikan terhadap keinginan dan keputusan pembelian hijau konsumen. Platform media sosial digunakan oleh konsumen sebagai sumber informasi untuk meningkatkan pengetahuan kosumen mengenai produk hijau sehingga dapat digunakan produsen dalam mempromosikan produk hijau. Meskipun demikian, konsumen tidak otomatis membeli produk hijau setelah menerima informasi melalui media sosial, namun konsumen harus cukup mempunyai pengetahuan tentang produk hijau dan sikap peduli terhadap lingkungan. Untuk itu kajian ini bertujuan menganalisis pengaruh penggunaan media sosial, pemasaran melalui media sosial, sikap terhadap produk hijau dan pengetahuan produk hijau terhadap keinginan pembelian konsumen milenial, serta pengaruh variabel tersebut terhadap keputusan pembelian melalui keinginan pembelian. Penelitian dilakukan di Kota Banjarmasin, Kalimantan Selatan. Sampel dalam penelitian ini berjumlah 240 responden yang dipilih menggunakan metode judgment sampling. Pengambilan data dilakukan melalui kuesioner. Data tersebut kemudian dianalisis menggunakan metode Structrural Equation Modeling – Partial Least Square (SEM-PLS). Hasil penelitian menunjukkan bahwa pemasaran media sosial, sikap terhadap produk hijau dan pengetahuan produk hijau berpengaruh secara positif dan signifikan terhadap keinginan pembelian serta keputusan pembelian produk hijau, sedangkan penggunaan media sosial ditemukan tidak berpengaruh pada keinginan pembelian maupun keputusan pembelian.
PERBANDINGAN PERFORMA MODEL MACHINE LEARNING SUPPORT VECTOR MACHINE, NEURAL NETWORK, DAN K-NEAREST NEIGHBORS DALAM PREDIKSI HARGA SAHAM
Authors: Sudriyanto Sudriyanto , Syahro Fatimatus , Fitriani Novi
Published: December 2023

This study aims to analyze the performance of three prediction models, namely K-Nearest Neighbors (K-NN), Neural Network (NN), and Support Vector Machine (SVM), in predicting the stock price of PT Astra International Tbk (ASII.JK). The research encompasses the initial stages through evaluation using optimal parameters for these three algorithms. The research findings reveal that the K-NN prediction model has the lowest Root Mean Square Error (RMSE) value, with a value of 0.037, indicating the most accurate prediction compared to the other models. Despite the NN model having an RMSE of 0.048, which is higher than K-NN, it still provides reasonably accurate predictions. Meanwhile, the SVM model has an RMSE of 0.075, indicating a higher level of error in its predictions. Based on these results, the recommendation is to utilize the K-NN model as the preferred choice for predicting the ASII.JK stock price.
Fulminant Hepatitis Revealing Complicated Crohn’s Disease of Budd Chiari Syndrome: About a Case
Authors: Belkhatir Amal , Hassaine Mehdi , Kies Habib
Published: December 2023

The Budd-chiari syndrome (BCS) is a rare vascular disease of multifactorial etiopathogenesis, represents a serious thromboembolic complication of Crohn's disease (CD), and may be the revealing mode. This condition results from obstruction of hepatic venous drainage from the hepatic venules to the terminal part of the inferior vena cava, and can be primary or secondary. Here, we report a case of a young woman with fulminant hepatitis whose etiological diagnosis revealed Crohn's disease with acute budd chiari syndrome and who was successfully treated with anticoagulants associated with biotherapy. The patient had a very good clinical evolution, after three months total recovery from the BCS. Very few cases have been published on this association.
Analisis Semiotika atas Logo Perseroan Terbatas Artindo Drey Karya
Authors: Setiawan Riko , Toni Ahmad
Published: December 2023

Setiap perusahaan maupun organisasi membutuhkan identitas sebagai ciri khas. Ciri khas tersebut berfungsi sebagai media pengingat oleh konsumen. Selain merek dagang dan produk, perusahaan maupun organisasi juga harus memiliki slogan dan logo yang berfungsi sebagai alat promosi, baik promosi media cetak, online ataupun iklan televisi. Sebuah desain logo merupakan representasi atau karakteristik sebuah perusahaan atau organisasi. Perusahaan yang secara konsisten menggunakan dan memperkenalkan logo mereka ke publik secara lambat laun akan mengunggah ingatan konsumen terhadap produk yang di miliki oleh perusahaan tersebut. Logo perusahaan adalah pembeda visual suatu perusahaan dengan perusahaan lain. Gambar dan tulisan sebagai elemen penting pembentuk logo karena merupakan sebuah sistem tanda yang bertujuan untuk mengkomunikasikan pesan mengenai jenis usaha, citra, atau bahkan karakter perusahaan kepada masyarakat. Tanda-tanda yang digunakan dalam sebuah logo merupakan tanda tanda yang mudah dipahami dan telah disepakati secara konvensional sehingga mampu dengan cepat berkomunikasi dengan khalayak. Artindo Drey Karya sebagai sebuah perusahaan kontraktor interior berusaha mengkomunikasikan pesan mengenai jenis usaha serta citra perusahan kemasyarakat luas dengan cara menggunakan sistem tanda yang terdapat pada logo Artindo Drey Karya. Tanda-tanda visual yang digunakan berupa elemen tulisan dan elemen gambar pada logo Artindo Drey Karya sangat menarik untuk diteliti dan dianalisa oleh peneliti. Tujuan dari penelitian ini adalah untuk mengetahui makna yang terkandung dalam logo Artindo Drey Karya. Jenis metode yang digunakan adalah metode kualitatif dengan analisis semiotika Charles Sanders Peirce dan juga mengunakan teori semiotika Charles Sander Peirce. Hasil yang didapat adalah logo Artindo Drey Karya memiliki filosofi yang dalam tentang kreatifitas dan kehidupan yang digambarkan melalui simbol gedung pencakar langit dan dibalut lingkaran kehidupan. Kreatifitas dan kehidupan membutuhkan sebuah keseimbangan atas segala realitas dan konsekuensi yang ada dimana filosofi tersebut digambarkan melalui logotype dan logogram sebagai elemen pembentuk logo perusahaan.
Mengelola Komunikasi dalam Mengatur Bawahan di Perusahaan Perkebunan
Authors: Riadi Selamat , Ritonga Syafruddin
Published: December 2023

Dalam menjalankan aktifitas kerja di area perkebunan perlu ada pengendalian secara maksimal berupa sumberdaya manusia yang handal dalam mengelolaan perkerjaan fisik. Hal tersebut merupakan tantangan bagi seorang asisten di perusahaan perkebunan dalam mengelola ketrampilan komunikasi saat mengatur staf atau bawahannya di perusahaan perkebunan Sumatera Utara. Penelitian ini menggunakan metode deskriptif dengan pendekatan kualitatif. Objek penelitiannya adalah perkebunan di Sumatera Utara. Temuan penelitian adalah personal yang menjabat sebagai asisten kebun tidak cukup hanya memiliki ketrampilan dalam bidang pengelolaan tanaman sawit dan karet saja namun juga dibutuhkan kemampuan mengatur dan mengelola bawahan. Mereka perlu memahami bahwa hubungan kerja antara asisten dan bawahannya menimbulkan relasi dalam bentuk valensi dihadapkan dengan harapan dan instrumentalisasi dapat menimbbulkan motivasi kerja para bawahan.
Isolated fourth ventricle craniopharyngioma: Representative case illustration and review of literature
Authors: Ahmed Nazmin , Azam Md. Isma
Published: December 2023

Background:

Sella and suprasellar areas are frequently affected by craniopharyngiomas. In this article, eight occurrences have been documented. One is new, and the remaining seven are from previously published articles. Their prevalence in the posterior fossa without expansion from the suprasellar area is unusual.

Case Description:

We present a case of a primary 4th ventricular craniopharyngioma of the posterior fossa in a 16-year-old male with no association with Gardner’s syndrome. He presented with sudden deterioration of consciousness level and was diagnosed as having a homogeneously contrast enhancing lesion occupying the 4th ventricle with obstructive hydrocephalus. The patient underwent emergency placement of external ventricular drain followed by complete removal of the tumor on the next day by midline suboccipital craniotomy with telovelar approach. Histopathological features were consistent with the adamantinomatous variety of craniopharyngioma. He had complete neurological recovery and no evidence of tumor recurrence in 1-year follow-up.

Conclusion:

The craniopharyngioma in our case was distinct because it was a solid tumor with no cystic component, exhibited homogeneous contrast enhancement in neuroimaging, developed in the fourth ventricle, and reached the level of foramen magnum, features that had rarely been documented previously. We also reviewed the literature on reported cases of 4th ventricular craniopharyngioma to strengthen knowledge in this area and highlight the embryological basis of ectopic craniopharyngioma.
Study on in vitro therapeutic impact of 17-ꞵ Estradiol on Glioblastoma cell lines
Authors: Ashwini K. , Shetty Vijith V. , Raghotham Ananthan , Shetty Praveen Kumar , Suchetha Kumari N.
Published: December 2023

Glioblastomas (GBM) or grade IV astrocytomas is the most aggressive and frequent tumor in the Central Nervous System (CNS). GBM treatment mainly consists of surgical resection and radio and/or chemotherapy. However, due to its infiltration capacity, it is practically impossible to completely extract the tumor and it relapses. Aberrant EGFR expression is observed in GBM including EGFR mutation, rearrangement and deletions. Blood brain barrier is one of the major obstacles which prevents the entry of larger molecules into the brain. Hence a small molecule, with lesser neurotoxicity should be developed in treating GBM or any other brain related diseases. Previous studies have reported the therapeutic potency of 17-ꞵ Estradiol in treating breast cancer, but little is known about the therapeutic role of estrogen signalling in the development and progression of gliomas. Estradiol being the small molecule has molecular weight of 272.4g/mol. It is a lipophilic molecule and therefore it can pass through the blood brain barrier by passive diffusion and could be considered as a therapeutic molecule in treating GBM. Present study showed that 17-ꞵ Estradiol inhibited the migration, colony formation in GBM cell lines. Further it induced early and late apoptosis and arrested the cell cycle at S-Phase of the cell cycle. EGFR and downstream EGFR associated protein expression were also reduced upon exposure of GBM cell lines to E2. These results show that 17-ꞵ Estradiol could be considered as a therapeutic molecule in GBM treatment.
Quality control of marketed products of Andrographis paniculata by HPLC analysis
Authors: Champati Bibhuti Bhusan , Ray Asit , Jena Sudipta , Sahoo Ambika , Nayak Sanghamitra
Published: December 2023

Andrographis paniculata is one of the most important medicinal plants having several pharmaceutical properties. Various pharmaceutical products and raw powders of this herb are sold in the market. The high demand for A. paniculata poses the problem of adulteration in their products. Therefore, it becomes necessary to check the quality in terms of their major bioactive compounds. In the present study, several marketed products were analyzed for their quality assessment i.e. for the presence of desired bioactive constituent, andrographolide. Ten tested products of A. paniculata showed the presence of andrographolide. A validated High Performance Thin Layer Chromatography (HPLC) method has been used for the quantitative estimation of andrographolide. andrographolide was detected at a retention time (Rt) of 17.8±0.05 and was quantified using a linear regression equation. The amount of andrographolide in the marketed products was in the range of 0.01 to 7.08 %. The chromatographic fingerprints were developed in all marketed products in the study. Thus, the present study dealing with the detection and quantification of andrographolide through HPLC analysis would have enough significance in the quality control of marketed products of andrographis paniculata.