bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALISIS KAPASITAS DUKUNG FONDASI GEDUNG PELAYANAN UMUM DAN KEMAHASISWAAN POLITEKNIK KESEHATAN GORONTALO BERDASARKAN DATA SONDIR
Authors: Ismail Rahmad Wahyudi
Published: January 2024

The Research objectives are to achieve the foundation support capacity of the wells by referring to the sample of sondir data research conducted by the UNG laboratory. It is located in Moodu village, East city district, Gorontalo city. The research method used quantitative methods by recalculating the burden that can be borne by the foundation of the well.the soil conditions in Gorontalo Province, especially Gorontalo, are of clay type soil. In this study, the secondary data was take from quantitative methods where the relevant agencies concern to the form of sondir data. To process it, the writer uses 2 analytical equations to calculate the bearing capacity of the well foundation. Through put processing, it will get some results that usefull as a reference for the construction of the building. Then, it makes the results are more accurate. Based on the evaluation results, the construction of this building at point 1 with a depth of 2.80 m and a diameter of 1.20 m is 209.67 tons - 219.23 tons, while at point 2 with a depth of 2.80 m and a diameter of 1.20 m is 186.79 tons -  198.23 tons.
IDENTIFIKASI DAMPAK AKSES JALAN TOL TERHADAP PENGGUNAAN LAHAN PERMUKIMAN DI KECAMATAN TEMBALANG
Authors: Hilmi Hilmansyah
Published: January 2024

Construction of toll roads can be a generator in the development of Semarang City. It can be seen from the indications of an increase in population, and an increase in built-up land. A significant increase in the number of residents was in Tembalang District, namely 76,856 people. The expansion of built-up land is starting to be seen clearly in the city of Semarang, one of which is Bulusan Village and Tembalang Village which are located in Tembalang District. The development that took place in the Kelurahan was in the form of settlements (clean and slums) and trade and services and began to move rapidly since there was access to the Tembalang toll gate in the Tembalang Sub-District. In addition, there is a main driving factor for this increase, namely the difference between the Undip campus which is in the Tembalang Village. This study aims to identify how far the impact caused by the existence of toll gates in Tembalang Village from the spatial aspect in the form of residential land use (clean and slum). In achieving this goal, a spatial analysis of changes in land use was carried out from 1998 to 2018. Spatial urban development can be identified using land use data extracted from multitemporal Landsat imagery (Landsat 5 TM 1998, Landsat 7 ETM+ years, Landsat 7 ETM+ years 2003, Landsat 7 ETM+ in 2008, Landsat 7 ETM+ in 2013, Landsat 8 OLI in 2018). The results of the classification of land use show that the overall development of the city of Semarang leads to the east and south, the sub-districts with the number of built-up land growth are Tembalang, Banyumanik, Ngaliyan, Genuk, and Pedurungan. Then it was lowered again until the sub-district unit in Tembalang District saw an increase in built-up land in Tembalang and Bulusan Districts, both of which are the main gates using toll road access from the Tembalang Toll Gate.
TINJAUAN KETERSEDIAAN AIR BERSIH DI KECAMATAN SUAWAWA KABUPATEN BONE BOLANGO
Authors: Mato Rahmit Aditya , Rachman Ari Putra
Published: January 2024

The research location was carried out in Suwawa District, Bone Bolango Regency using calculations so that this research was quantitative in nature. Based on the research results, normal domestic and non-domestic water needs in Ulanta Village, Bube Village and Bulodawa Village for the next few years (until 2020) are found to be 44.143 liters/second or 0.044 m3/second, while the maximum daily need for clean water is 0.086 m3/second, for peak hour demand in 2020 (5 year projection) it is found to be 0.131 m3/second. The availability of water in the Ulanta River in Suwawa District, calculated using the main discharge Q, is 1,917 m3/second. The relationship between water demand and water availability in the Ulanta river is still sufficient to meet normal water needs and the maximum water requirements required are 0.075 m3/sec < 1.917 m3/sec and 0.086 m3/sec < 1.917 m3/sec. Meanwhile, peak hour water demand is still sufficient with water availability, namely 0.131 m3/second < 1.917 m3/second. After carrying out this research, the researcher suggested that in future research to take more into account the stability of water flow which is a basic need for society, more specifically for the people of Suwawa District
Upaya Meningkatkan Kemampuan Motorik Halus Anak Melalui Kegiatan Menggunting Sesuai Pola TK Az Zahra Islamic School Kota Batam
Authors: Delfia Yuni
Published: January 2024

Anak  usia dini adalah individu yang sedang mengalami perkembangan yang sangat fundamental bagi kehidupan selanjutnya, karena itu pendidikan anak usia dini perlu menyediakan kegiatan yang dapat mengembangkan berbagai aspek perkembangan meliputi kognitif, bahasa, sosialemosional, nilai agama dan moral, dan fisik motorik. Berdasarkan pengamatan yang dilakukan penulis pada kelompok B mengalami keterlambatan perkembangan motorikhalus, ditandai dengan belum terampilnya anak dalam menggunting. Hal ini bisa diatasi dengan cara melatih motorik halus anak melalui kegiatan menggunting dengan media yang menarik dan menyenangkan. Adapun pelaksanaan untuk meningkatkan hasil belajar anak dilaksanakan melalui perbaikan pada siklus 1 dan siklus 2 dengan melakukan desain prosedur perbaikan, pengamatan, teknik analisis data serta melakukan refleksidiri untuk pendidik. Dari hasil pengamatan pendidik, menunjukkan adanya peningkatan kemampuan anak dalam penggunaan motorik halus melalui kegiatan menggunting, dari data awal 2 anak (12,5%) meningkat menjadi 14 anak (87,5%) pada siklus 2 dari 16 anak.
Peningkatan Nilai-Nilai Islam melalui Kurikulum Berbasis RA dengan Pendalaman Profil Pelajar Pancasila
Authors: Harahap Sahrona , Karim Aim Abdul , Savitri Devita , Adawiah Laila Ribiatul
Published: January 2024

Penelitian ini mengkaji berbagai permasalahan yang berkaitan dengan nilai-nilai Islam pada anak-anak usia dini. Permasalahan tersebut meliputi krisis moral, kurangnya pendidikan nilai-nilai Islam yang terstruktur, pengaruh budaya sekuler, kurangnya peran orang tua dan guru, keterbatasan sumber daya pendidikan agama, tantangan teknologi dan media sosial, serta dampak globalisasi dan multikulturalisme. Tujuan penelitian ini untuk melihat peningkatan nilai-nilai islam anak usia dini dengan pengenalan profil Pancasila pada anak usia dini dapat menjadi solusi untuk mengatasi masalah-masalah tersebut dengan mengintegrasikan nilai-nilai Pancasila yang sejalan dengan Islam dalam pendidikan anak-anak. Metode penelitian yang digunakan adalah Penelitian Tindakan Kelas (PTK) pada kelas A dan B dengan jumlah 15 anak masing-masing kelas di Kec Tawang Kota Tasikmalaya. Hasil penelitian yang mengukur perkembangan anak-anak dalam aspek beriman, berakhlak mulia, bergotong royong, serta kemampuan mandiri, berpikir kritis, dan kreatif melalui kurikulum Raudhatul Athfal. Hasil penelitian menunjukkan peningkatan yang positif dalam pemahaman dan penerapan nilai-nilai tersebut selama siklus pembelajaran.
Pengembangan Kemampuan Kognitif melalui Kegiatan Menghitung Biji Congklak pada Anak Usia Dini
Authors: Hasanah Lailatun , Daulay Musnar Indra , Amalia Rizki
Published: January 2024

Penelitian ini bertujuan untuk meningkatkan kemampuan kognitif  anak melalui media biji congklak di Kelompok Bermain Ananda Desa Beringin Makmur Kec.Kerumutan. Jenis penelitian ini adalah penelitian tindakan kelas (PTK). Subyek tindakan penelitian ini adalah kelompok Anak Bermain Ananda yang berjumlah 22 anak. Penelitian ini bersifat kolaboratif antara peneliti, guru kelas, dan kepala sekolah. Pengumpulan data menggunakan observasi, dokumentasi hasil karya anak dan catatan lapangan. Penelitian tindakan kelas ini dilakukan melalui 2 siklus, masing-masing siklus 2 pertemuan. Prosedur dalam penelitian ini terdapat empat tahap yaitu perencanaan, pelaksanaan, pengamatan, dan refleksi. Data dianalisis dengan teknik komparatif/ perbandingan yaitu membandingkan hasil yang dicapai anak dengan indikator kinerja. Hasil penelitian menunjukkan bahwa terjadinya peningkatan kogmitif anak melalui kegiatan media biji congklak  pada setiap siklusnya. Kesimpulan dari penelitian ini adalah melalui kegiatan bermain melaui media biji congklak dapat meningkatkan kognitif anak.
Upaya Meningkatkan Kemampuan Motorik Halus Anak Melalui Kegiatan Membatik dengan Metode Pemberian Tugas
Authors: Listianingsih Listianingsih , Amalia Rizki , Joni Joni
Published: January 2024

Penelitian ini dilatar belakangi oleh rendahnya kemampuan motorik halus pada anak kelompok B TK Dharma Bakti. Solusi yang ditawarkan oleh peneliti berupa kegiatan membatik dengan metode pemberian tugas. Metode yang digunakan dalam penelitian ini adalah metode Penelitian Tindakan Kelas(PTK). Penelitian tindakan kelas ini dilaksanakan sebanyak 2 siklus, pada masing-masing siklus terdapat 2 kali pertemuan. Teknik pengumpulan data yang digunakan adalah teknik observasi dan teknik dokumentasi.  Hasil penelitian menunjukkan peningkatan motorik halus dalam setiap indikatornya, indikator 1 melakukan eksplorasi dengan berbagai media dalam kegiatan nilai BB 0 anak atau 0% nilai MB 06 atau 0% nilai BSH 2 anak atau 18,18% sementara nilai BSB 9 anak atau 81,81% Adapun indikator 2 menggunakan alat tulis dengan benar nilai BB 0 anak atau 0% nilai MB 06 atau 0% nilai BSH 3 anak atau 27,27% dan nilai BSB 8 anak atau 72,72% indikator 3 meniru bentuk nilai BB 0 anak atau 0% nilai MB 1 anak atau 9,9% nilai BSH 1 anak atau 9,9% dan nilai BSB 9 anak atau 81,81%d dengan tersebut menunjukkan bahwa kemampuan membatik anak sudah meningkat pada siklus II.
Upaya Meningkatkan Kemampuan Bahasa Anak melalui Kegiatan Bercerita Berbantuan Media Pop Up Book
Authors: Anggraini Nining , Amalia Rizki , Fauziddin Mohammad
Published: January 2024

Penelitian ini bertujuan untuk meningkatkan kemampuan bahasa anak melalui kegiatan bercerita berbantuan media pop up book pada anak kelompok B di TK Dharma Bakti. Metode penelitian yang digunakan adalah penelitian tindakan kelas yang dilakukan dalam 2 siklus. Subjek penelitian nya adalah anak-anak yang berada di kelompok B TK Dharma Bakti berjumlah 13 anak. Objek penelitian nya adalah media pop up book dan kemampuan berbahasa anak. Analisis data yang digunakan adalah presentase. Data yang diambil berupa hasil tes akhir siklus dan hasil kerja langsung. Hasil penelitian menunjukkan bahwa kemampuan bahasa anak dalam bercerita menggunakan media pop up book  berkembang sangat baik pada setiap indikatornya. Dapat dilihat hasilnya pada tindakan siklus II. Dimana pada indikator anak mampu menceritakan kembali isi cerita dengan menggunakan media pop up book mendapat nilai 53,84%, indikator anak mampu menjawab pertanyaan yang terkait dengan isi cerita mendapat nilai 84,61%, indikator anak mampu berkomunikasi secara lisan, memiliki perbendaharaan kata mendapat nilai 100%. serta indikator anak mampu menyusun kalimat sederhana mendapat nilai76,92%.
Meningkatkan Pemahaman Mengenal Bentuk-Bentuk Geometri Menggunakan Alat Permainan Edukatif (APE) Papan Geometris TK Pertiwi Kota Pangkalpinang
Authors: Palupi Diah
Published: January 2024

Subjek penelitian dalam Penelitian Tindakan Kelas (PTK)  ini adalah  peserta didik pada TK Pertiwi Pangkalpinang yang beralamat Jalan Kejaksaan Kecamatan Taman Sari Kota Pangkalpinang Propinsi Kepulauan Bangka Belitung dengan kelompok B5 Pagi, usia peserta didik dalam kelompok ini antara 5-6 tahun dengan jumlah peserta didik 20 peserta didik dengan rincian peserta didik laki-laki berjumlah 10 orang dan peserta didik perempuan berjumlah 10 orangSetelah penelitian ini berlangsung selama dua siklus dapat disimpulkan bahwa  penggunaan Alat Permainan Edukatif (APE) Papan Geometris dapat meningkatkan pemahaman mengenal bentuk-bentuk geometri pada kelompok B5 di TK Pertiwi Pangkalpinang hal ini terlihat dari pencapaian perkembangan peserta didik  tiap siklus di mana pada Siklus I tingkat pencapaian perkembangan peserta didik 30% peserta didik belum dapat mengikuti kegiatan pembelajaran mengenal bentuk-bentuk geometri   dan Siklus 2 tingkat pencapaian perkembangan peserta didik  80 %.
The Influence of Leadership Style and Organizational Culture on Employee Performance in the Regional Secretariat of the Malaka Regent's Office, East Nusa Tenggara Province
Authors: AMARAL Mariano Pinto , NEOLAKA Melkisedek N.B.C. , TODA Hendrik
Published: January 2024

Purpose: This research, conducted at the Regional Secretariat of the Malacca Regent's Office, aims to assess the impact of Leadership Style and Organizational Culture on Employee Performance, both partially and simultaneously.Methodology:The method used in this research is a survey method with a quantitative approach. The data collection method used is the questionnaire method. Data was gathered through a survey of 284 Civil Servants (PNS), selected through simple random sampling. A Likert scale questionnaire was distributed, with 74 responses suitable for analysis.Findings:Multiple linear regression using SPSS version 26 revealed that leadership style (1) and organizational culture (2) individually have a significant positive effect on employee performance. Simultaneously (3), these factors positively and significantly influenced employee performance (F = 25.256, p = 0.000).Implication:The Coefficient of determination (R2) is 0.794, indicating that the combined impact of leadership style and organizational culture strongly influences variations in employee performance at the Malacca Regent's Office Regional Secretariat, accounting for 79.40%. In comparison, other unexamined factors influence 20.60% of this research.
Mathematical Modelling of the Dynamics and Control of Communicable Diseases with Emphasis on Cholera Epidemics
Authors: Avwerosuo Anthony Akalusi , Michael Okedoye Akindele
Published: January 2024

Cholera remains a disease of public health importance, associated with high morbidity and mortality. This research provides a mathematical approach on the effective control and possible eradication of Vibrio cholera causing menace. This was done using a deterministic SPIRB mathematical model, were we defined S-susceptible, P-protected, I-infected, R-recovered and B-bacteria. We carried out mathematical analyses on the model, such as the invariant region analysis, non-negativity of solutions, equilibrium points, basic reproduction number, stability analysis, sensitivity analysis and bifurcation analysis. All solutions of the SPIRB model are positive and there exists an invariant region for the model. Although, the disease-endemic equilibrium of the model is globally asymptomatically stable, the disease-free equilibrium of the model is not globally stable but locally asymptomatically stable. It was also revealed that the recruitment rate into the susceptible class, the probability that each contact is effective enough to cause infection, the contact rate with contaminated environment, the average contribution of each infected individual to the pathogen population of Vibrio cholera, and the progression rate of protected individuals to the susceptible class are the most sensitive parameters. We showed via the bifurcation analysis that if the progression rate of protected individuals to the susceptible class can be kept very close to zero, say between zero and unity, then the disease-free equilibrium can be kept stable. Numerical simulations were conducted to show the effects of some parameters on the classes.
Effects of Different Surface of Plyometric Training on Speed of Junior Volley Ball Players
Authors: Raj Dr. S. Lourdu , Maniazhagu Dr. D.
Published: January 2024

The purpose of study was to find out the effects of different surface of plyometric training on speed of junior volley ball players. To achieve the purpose of the study, thirty school girls’ from Jai Gopal Garodia Government higher secondary school, Madhavaram, Chennai, Tamilnadu were selected as subjects at random and their age group range between 12 to 14 years. The study was formulated as pre and post test random group design, in which thirty subject were divided into three equal groups. The experimental group-1 (n=10, SS-PT) underwent sand surface plyometric Training. The experimental group-2 (n=10, NS-PT) underwent normal surface plyometric training and group 3 served as control group (n=10, CG) did not undergo any specific training. In this study, two training programme were adopted as independent variable, i.e., sand surface plyometric training, normal surface plyometric training. The speed was chosen as a dependent variable, it was tested by 30 meters run and scores recorded in seconds. The selected two treatment group’s namely sand surface plyometric training and normal surface plyometric training was performed three days in a week for the period of six weeks, as per the stipulated training program. The selected performance parameters were collected before and after the training period. The collected pre and post data was critically analyzed with apt statistical tool of analysis of co-variance, for observed the significant adjusted post-test mean difference of three groups with respect to each parameter. The Scheffe’s post hoc test was used to find out pair-wise comparisons between groups with respect to each parameter. To test the hypothesis 0.05 level of significant was fixed
Mechanical Properties Improvements of the Materials Used in Manufacturing of Food Processing Equipment’s and Containers Using Different Techniques
Authors: El-Aziz Kh. Abd
Published: January 2024

The selection of construction materials is typically based on various factors such as cost, availability, ease of fabrication, strength, toughness, elasticity, sensitivity to corrosion and wear resistance. However, when it comes to materials used in food processing equipment and services, the primary focus is also on preventing food contamination from dirt, chemicals, microorganisms, and physical substances during the limited time that the product and equipment surfaces come into contact. In the production of machinery and equipment for food processing, storage, and transportation, a variety of metals are utilized, including aluminum, copper, tin, titanium, and notably stainless steel (SS). These metals are chosen for their mechanical qualities. To further enhance the mechanical strength, ease of forming fabrication, and health-friendly features of metallic materials, this study aims to explore the development of an expanded range of such materials using advanced scientific and technological applications.
Life Threatening Bleeding Tuberculosis Cecal Ulcer Managed with Hemostatic Clipping – A Case Report
Authors: Akmal A.B Mohamad , Nazr Nabil , D.S. Sanjay , C.W Yong
Published: January 2024

Massive life threatening lower gastrointestinal bleeding in adolescent is rarely being reported. Although mostly all life threatening lower gastrointestinal bleeding end up with laparotomy and hemicolectomy, however, few literatures have reported successful management using endoscopic modalities such as achieving hemostasis by endoscopic hemoclip. We are presenting a case report of a 14-years-old Sabahan girl who presented with acute life threatening massive lower gastrointestinal bleeding. We had investigated her with a computed topography scan (CT) of abdomen and pelvis which confirmed active bleeding from the ascending colon, and suspicious features of tuberculosis (TB) of the colon. The patient was treated successfully via colonoscopy with deployment of hemostatic clipping and adrenaline injection on the cecal ulcer done under a controlled environment in the operating theatre. She subsequently progressed well and completed treatment of 6-month anti-tuberculosis. The patient was stable and reported no further symptoms during follow-up time for 1 year.
Abstract
Published: January 2024

Yoga as a mind-body intervention being used for wellness is increasingly used as an add-on therapy in the management of several NCDs. The first RCT on Yoga on hypertension, published by Dr Chandra Patel in the Lancet in 1975, laid the foundation for vigorous research into the practice of yoga as a therapy. Yoga a wellness and fitness fad started moving from studios and home environments to hospitals in the late 90s. There has been an increasing trend for research publications in Yoga since International Day of Yoga was declared by UN in the year 2014. There has been an increase in publications on Yoga by 143% and meditation by 172% in the last 9 years. Putting together yoga and meditation keywords account for more than 18000 articles on PubMed. The US is the leading contributor, followed by India in terms of publications. Regarding clinical trials as registered on the WHO International clinical trials registry platform, we have India as a leading country in registered clinical trials in yoga. However, in comparison to the number of publications, the number of RCT publications is quite low. Very few articles are published in high-impact factor journals (Above 8.0). Most of the publications and studies have small sample sizes and are hypotheses generated. There is a need for large multicentric studies in Yoga. Though Yoga studies have found their way in some guideline documents in oncology and cardiology, a lot needs to be done to generate level 1 evidence to have Yoga incorporated as an integrative medicine in management of various clinical conditions. This presentation will highlight the journey where we stand today and what needs to be done in the future.
KEY PERFORMANCE INDICATORS FOR START-UPS IN FURNITURE INDUSTRY
Authors: Kirjazovaitė Guoda
Published: January 2024

It is not uncommon to see start-ups suddenly fail. Often, startups try to follow the example of other, successful companies, but they don’t always succeed, so this article looks at KPIs for startups in the furniture industry. The furniture industry in the Baltic States is reviewed and their development at different stages of the company’s growth is analyzed. The product factors and interrelationships of a successful furniture company have been identified. The article presents the results of the surveyed companies engaged in the development of products for the furniture industry. The reasons and the main factors influencing the success of the company are given. Based on the results of the study, a model for the development of KPIs for start-ups in the furniture industry is presented and conclusions and suggestions are presented. The model consisted of 10 different spheres (success factors, fail factors, inbound logistics, outbound logistics, marketing & sales, procurement, operation, service, HRM, technology development, sustainability) for 5 different companies size (1–9 employees, 10–49 employees, 50–99 employees, 100–249 employees and 250 and more employees). In the model were overwide main KPIs blocks and suggested considerate of companies size.
Subphotospheric Emission from Short Gamma-Ray Bursts: Protons Mold the Multimessenger Signals
Authors: Rudolph Annika , Tamborra Irene , Gottlieb Ore
Published: January 2024

The origin of the observed Band-like photon spectrum in short gamma-ray bursts (sGRBs) is a long-standing mystery. We carry out the first general relativistic magnetohydrodynamic simulation of an sGRB jet with initial magnetization σ
0 = 150 in dynamical ejecta from a binary merger. From this simulation, we identify regions along the jet of efficient energy dissipation due to magnetic reconnection and collisionless subshocks. Taking into account electron and proton acceleration processes, we solve for the first time the coupled transport equations for photons, electrons, protons, neutrinos, and intermediate particle species up to close to the photosphere (i.e., up to 1 × 1012 cm), accounting for all relevant radiative and cooling processes. We find that the subphotospheric multimessenger signals carry strong signatures of the hadronic interactions and their resulting particle cascades. Importantly, the spectral energy distribution of photons is significantly distorted with respect to the Wien one, commonly assumed below the photosphere. Our findings suggest that the bulk of the nonthermal photon spectrum observed in sGRBs can stem from hadronic processes occurring below the photosphere and previously neglected, with an accompanying energy flux of neutrinos peaking in the GeV energy range.
Probing Shocked Ejecta in SN 1987A: A Novel Diagnostic Approach Using XRISM-Resolve
Authors: Sapienza Vincenzo , Miceli Marco , Bamba Aya , Orlando Salvatore , Lee Shiu-Hang , Nagataki Shigehiro , Ono Masaomi , Katsuda Satoru , Mori Koji , Sawada Makoto , Terada Yukikatsu , Giuffrida Roberta , Bocchino Fabrizio
Published: January 2024

Supernova (SN) 1987A is one of the best candidates to exploit the capabilities of the freshly launched XRISM satellite. This celestial object offers the unique opportunity to study the evolution of an SN into a young supernova remnant. To date, the X-ray emission has been dominated by the shocked circumstellar medium, with no shocked ejecta firmly detected. However, recent studies provide compelling evidence that in the forthcoming years, the X-ray emission from SN 1987A will increasingly stem from the ejecta. Our aim is to assess the proficiency of the XRISM-Resolve high-resolution spectrometer in pinpointing signatures of the shocked ejecta in SN 1987A. Taking advantage of a self-consistent state-of-the-art magneto-hydrodynamic simulation that describes the evolution from SN 1987A to its remnant, we synthesized the XRISM-Resolve spectrum of SN 1987A, as it would be collected in the allocated observation during the performance verification phase, which is foreseen for 2024. Our predictions clearly show the leading role of shocked ejecta in shaping the profile of the emission lines. The Doppler broadening associated with the bulk motion along the line of sight of the rapidly expanding ejecta is shown to increase the line widths well above the values observed so far. The quantitative comparison between our synthetic spectra and the XRISM spectra will enable us to establish a strong connection between the broadened line emission and the freshly shocked ejecta. This, in turn, will allow us to retrieve the ejecta dynamics and chemical composition from the X-ray emission.
Tilted Circumbinary Planetary Systems as Efficient Progenitors of Free-floating Planets
Authors: Chen Cheng , Martin Rebecca G. , Lubow Stephen H. , Nixon C. J.
Published: January 2024

The dominant mechanism for generating free-floating planets has so far remained elusive. One suggested mechanism is that planets are ejected from planetary systems due to planet–planet interactions. Instability around a single star requires a very compactly spaced planetary system. We find that around binary star systems instability can occur even with widely separated planets that are on tilted orbits relative to the binary orbit due to combined effects of planet–binary and planet–planet interactions, especially if the binary is on an eccentric orbit. We investigate the orbital stability of planetary systems with various planet masses and architectures. We find that the stability of the system depends upon the mass of the highest-mass planet. The order of the planets in the system does not significantly affect stability, but, generally, the most massive planet remains stable and the lower-mass planets are ejected. The minimum planet mass required to trigger the instability is about that of Neptune for a circular orbit binary and a super-Earth of about 10 Earth masses for highly eccentric binaries. Hence, we suggest that planet formation around inclined binaries can be an efficient formation mechanism for free-floating planets. While most observed free-floating planets are giant planets, we predict that there should be more low-mass free-floating planets that are as of yet unobserved than higher-mass planets.
X-Ray Polarized View of the Accretion Geometry in the X-Ray Binary Circinus X-1
Authors: Rankin John , La Monaca Fabio , Di Marco Alessandro , Poutanen Juri , Bobrikova Anna , Kravtsov Vadim , Muleri Fabio , Pilia Maura , Veledina Alexandra , Fender Rob , Kaaret Philip , Kim Dawoon E. , Marinucci Andrea , Marshall Herman L. , Papitto Alessandro , Tennant Allyn F. , Tsygankov Sergey S. , Weisskopf Martin C. , Wu Kinwah , Zane Silvia , Ambrosino Filippo , Farinelli Ruben , Gnarini Andrea , Agudo Iván , Antonelli Lucio A. , Bachetti Matteo , Baldini Luca , Baumgartner Wayne H. , Bellazzini Ronaldo , Bianchi Stefano , Bongiorno Stephen D. , Bonino Raffaella , Brez Alessandro , Bucciantini Niccolò , Capitanio Fiamma , Castellano Simone , Cavazzuti Elisabetta , Chen Chien-Ting , Ciprini Stefano , Costa Enrico , De Rosa Alessandra , Del Monte Ettore , Di Gesu Laura , Di Lalla Niccolò , Donnarumma Immacolata , Doroshenko Victor , Dovčiak Michal , Ehlert Steven R. , Enoto Teruaki , Evangelista Yuri , Fabiani Sergio , Ferrazzoli Riccardo , Garcia Javier A. , Gunji Shuichi , Hayashida Kiyoshi , Heyl Jeremy , Iwakiri Wataru , Jorstad Svetlana G. , Karas Vladimir , Kislat Fabian , Kitaguchi Takao , Kolodziejczak Jeffery J. , Krawczynski Henric , Latronico Luca , Liodakis Ioannis , Maldera Simone , Manfreda Alberto , Marin Frédéric , Marscher Alan P. , Massaro Francesco , Matt Giorgio , Mitsuishi Ikuyuki , Mizuno Tsunefumi , Negro Michela , Ng Chi-Yung , O’Dell Stephen L. , Omodei Nicola , Oppedisano Chiara , Pavlov George G. , Peirson Abel L. , Perri Matteo , Pesce-Rollins Melissa , Petrucci Pierre-Olivier , Possenti Andrea , Puccetti Simonetta , Ramsey Brian D. , Ratheesh Ajay , Roberts Oliver J. , Romani Roger W. , Sgrò Carmelo , Slane Patrick , Soffitta Paolo , Spandre Gloria , Swartz Douglas A. , Tamagawa Toru , Tavecchio Fabrizio , Taverna Roberto , Tawara Yuzuru , Thomas Nicholas E. , Tombesi Francesco , Trois Alessio , Turolla Roberto , Vink Jacco , Xie Fei
Published: January 2024

Cir X-1 is a neutron star X-ray binary characterized by strong variations in flux during its eccentric ∼16.6 day orbit. There are also strong variations in the spectral state, and it has historically shown both atoll and Z state properties. We observed the source with the Imaging X-ray Polarimetry Explorer during two orbital segments, 6 days apart, for a total of 263 ks. We find an X-ray polarization degree in these segments of 1.6% ± 0.3% and 1.4% ± 0.3% at polarization angles of 37° ± 5° and −12° ± 7°, respectively. Thus, we observed a rotation of the polarization angle by 49° ± 8° along the orbit. Because variations of accretion flow, and then of the hardness ratio, are expected during the orbit, we also studied the polarization binned in hardness ratio and found the polarization angle differing by 67° ± 11° between the lowest and highest values of the hardness ratio. We discuss possible interpretations of this result that could indicate a possible misalignment between the symmetry axes of the accretion disk and the Comptonizing region caused by the misalignment of the neutron star’s angular momentum with respect to the orbital one.
An Inward-moving and Asymmetric Velocity Wave Detected in LAMOST-Gaia
Authors: Chen Yuqin , Zhao Gang , Wu Wenbo , Guo Zixi , Zhang Haopeng , Li Zhuohan
Published: January 2024

The phase space, as coded by kinematic parameters and chemical abundances, is crucial for understanding the formation of the Galactic disk. Using red giant stars from the Galactic thin disk with [Fe/H] > − 0.8 and low-α ratios identified in LAMOST-Gaia, we detect numerous ridges and undulations in the R–V

ϕ
diagram coded by median V

R
. Strikingly, the slope of these features changes from −22 km s−1 kpc−1 to −8 km s−1 kpc−1 at R ∼ 11.5 kpc. Accordingly, the R
g–V

ϕ
plane, also coded by median V

R
, reveals wave-like structures that propagate outwards in the inner disk but reverse direction and move inwards beyond R
g = 11.5 kpc. The most prominent feature is the G1 group, distinguished by its wider spread and negative median V

R
at R
g
∼ 15 kpc, contrasting with the narrower G0 group that exhibits positive median V

R
at R
g < 11.5 kpc. Furthermore, the [C/N] versus [Fe/H] relationship for the G1 group mirrors the opposite trend compared to the G0 group. Since [C/N] serves as a proxy for age, this contrasting behavior suggests an inverse age–metallicity relation for the G1 group. Comparison with the Sagittarius dwarf galaxy reveals that the G1 group possesses distinct [Mg/Fe] and [Al/Fe] ratios, yet its [C/N] versus [Fe/H] pattern is similar to that of the Sgr dwarf galaxy. Based on these observations, we proposed that the inward-moving and asymmetric velocity wave G1 might be linked to the minor merge of the Sagittarius galaxy.
Activity Discovered on Mars-Crossing Jupiter Family Comet 2018 OR by Citizen Scientists
Authors: Farrell Kennedy A. , Chandler Colin Orion , Oldroyd William J. , Trujillo Chadwick A. , Burris William A. , Hsieh Henry H. , Kueny Jay K. , DeSpain Jarod A. , Mendoza Magbanua Mark Jesus , Sedaghat Nima , Sheppard Scott S. , Mazzucato Michele T. , Bosch Milton K. D. , Shaw-Diaz Tiffany , Gonano Virgilio , Lamperti Al , da Silva Campos José A. , Goodwin Brian L. , Terentev Ivan A. , Dukes Charles J. A.
Published: January 2024

We present the discovery of cometary activity on 2018 OR as part of our Active Asteroids project, a NASA Partner Program fueled by Zooniverse Citizen Scientists. Volunteers found 2018 OR with a long, diffuse tail in archival images from the Dark Energy Camera on the Blanco 4 m telescope at the Cerro Tololo Inter-American Observatory in Chile. Our team identified additional Canada–France–Hawaii–Telescope MegaCam and Zwicky Transient Facility archival data after classification by Citizen Scientists. Activity originating from 2018 OR and directed in the anti-solar and anti-velocity directions was visible in archival images between UT 2018 September 5–18. Our dynamical simulations indicate 2018 OR experiences close encounters with Jupiter over hundred-year timescales. The orbital period and dynamics suggest 2018 OR is a Jupiter Family Comet, and we recommend further observations from the community to reduce observational uncertainties and investigate activity patterns.
A New 2D Energy Balance Model for Simulating the Climates of Rapidly and Slowly Rotating Terrestrial Planets
Authors: Ramirez Ramses M.
Published: January 2024

Energy balance models (EBMs), alongside radiative–convective climate models and global climate models (GCMs), are useful tools for simulating planetary climates. Historically, planetary and exoplanetary EBMs have solely been 1D latitudinally dependent models with no longitudinal dependence, until the study of Okuya et al., which focused on simulating synchronously rotating planets. Following the work of Okuya et al., I have designed the first 2D EBM (PlaHab) that can simulate N2–CO2–H2O–H2 atmospheres of both rapidly and synchronously rotating planets, including Mars, Earth, and exoplanets located within their circumstellar habitable zones. PlaHab includes physics for both water and CO2 condensation. Regional topography can be incorporated. Here, I have specifically applied PlaHab to investigate the present Earth, early Mars, TRAPPIST-1 e, and Proxima Centauri b, representing examples of habitable (and potentially habitable) worlds in our solar system and beyond. I compare my EBM results against those of other 1D and 3D models, including those of the recent Trappist-1 Habitable Atmosphere comparison project. Overall, the EBM results are consistent with those of other 1D and 3D models, although inconsistencies among all models continue to be related to the treatment of clouds and other known differences between EBMs and GCMs, including heat transport parameterizations. Although 2D EBMs are a relatively new entry in the study of planetary/exoplanetary climates, their ease of use, speed, flexibility, wide applicability, and greater complexity (relative to 1D models) may indicate an ideal combination for the modeling of planetary and exoplanetary atmospheres alike.
Data mobilisation in the LWS Herbarium: success and prospects
Authors: Novikov Andriy , Savytska Anastasiia , Kuzyarin Oleksandr , Nachychko Viktor , Susulovska Solomia , Rizun Volodymyr , Susulovsky Andrii , Hushtan Habriel , Hushtan Kateryna , Leleka Dmytro
Published: January 2024

Digitisation of hosted specimens is a crucial task for all herbaria worldwide and is one of the main streams for today. By digitising their collections and publishing the datasets, the herbaria grant access to essential data to a wide research audience and, as a result, involve their collections in scientific work more actively. Digitisation also allows virtual preservation of the collections, which is especially important in conditions of hostilities, when the entire collection can be destroyed or damaged in one moment. This paper describes two datasets recently published in GBIF in the framework of the LWS herbarium digitisation initiative. It also contains some considerations about further digitisation priorities and plans in the LWS Herbarium in the context of complicated war conditions and limited facilities.

In total, 2,419 occurrence records from Ukraine mobilised from LWS Herbarium were published. These datasets are planned to be dynamic with the addition of new records along with progress of digitisation work at LWS. At least 6,000 more records are planned to be published through these datasets in 2024.
Own experience in catheter angiography and interventional treatment of patients with probable vertebrobasilar insufficiency
Authors: Ivanov N.
Published: January 2024

The vertebrabasilar (VB) system plays an essential role in the circulation of main structures of nervous system. About 25% of ischemic brain strokes are located in the vertebrobasilar circulation. 20-25% of them are due to atherosclerosis, leading to formation of hemodynamically significant stenoses in both vertebral arteries. Catheter angiography proves and visualise with great accuracy vascular pathology along the course of the extracranial segments of cerebral arteries. Interventional treatment in patients with significant vertebral artery stenoses is an established and safe method of treatment, complementing optimal drug therapy, and preceding surgical treatment.
Une flexibilité temporelle libératrice ?
Authors: Flécher Marion
Published: January 2024

Cherchant à attirer les femmes qui sont encore fortement minoritaires au sein des univers entrepreneuriaux, et en particulier dans le monde des start-up, les discours de promotion de l’entrepreneuriat insistent sur les apports de ce type d’activité en matière de disponibilité temporelle et d’articulation des temps sociaux. À partir d’une enquête qualitative et quantitative menée entre 2017 et 2019 par entretiens (n = 45) et par questionnaire (n = 501) auprès de fondateurs et de fondatrices de start-up, cet article interroge les effets de la flexibilité temporelle offerte par l’entrepreneuriat sur l’investissement des hommes et des femmes dans leur activité professionnelle. Derrière la valorisation des vertus émancipatrices de l’entrepreneuriat, l’enquête met en évidence des usages genrés de la flexibilité qui, loin de libérer les femmes des problématiques de conciliation, viennent limiter leur temps professionnel, lorsqu’ils ne renforcent pas leur assignation à la sphère domestique.
The effect of harvest time on the volatile compounds and bioactive properties of the flowers, leaves, and stems of Echinacea Pallida and its utilization to improve the oxidative stability of vegetable oils
Authors: Kocacik A. , Yalcin H.
Published: January 2024

The present study was undertaken to investigate the effect of harvest time on the bioactive properties of Echinacea pallida and to determine the antioxidant effect of its extract in vegetable oils. E. pallida was harvested in June, 2009, June, 2010 and August. 2010. Total phenolic content and antioxidant activity analyses of the plant extracts obtained with three different solvents were carried out using spectrophotometric methods. It was determined that harvest time and solvent type had significant effects on bioactive properties. In addition, the effect of E. pallida extract on the oxidative stability of vegetable oils was determined by the rancimat method. The extract (2000 ppm) obtained by ethanol (100%) showed similar oxidative stability on sunflower and canola oils compared to BHA (100 ppm). The GC-MS results revealed various volatile compounds such as bornyl acetate, caryophyllene E, musk ambrette, germacrene D, α-muurolol, musk ambrette, imidazo (1,2-a) pyrimidine, 1-pyrrolidino-1-cyclohexene, 2,3,5,6-tetrahydro-1H-pyrrolizine, pyrazine, and benzenaminium.
Sentiment Analysis of Electronic Word of Mouth (E-WoM) on E-Learning
Authors: Obot Okure Udo , Attai Kingsley Friday , Onwodi Gregory O. , James Imaobong , John Anietie
Published: January 2024

The proliferation of social media and the internet has given people many opportunities to air their views and to be at liberty to say what they feel without hindrance. This is beneficial to commercial organizations and the general well-being of the populace. However, the cost of this freedom is that spamming is practiced with little or no control. This chapter focuses on the electronic word of mouth (eWOM) of opinion holders and the sentiments expressed in eWOM. One of the areas of life impacted by sentiment is electronic learning because it has become a prevalent mode of learning. The study aims to analyze eWOM on e-learning which can help in identifying learners' sentiments. Findings from three thousand tweets show more neutral sentiments, followed by positive sentiments. Suggestions and recommendations as well as the future directions for sentiment analysis of eWOM on e-learning are also discussed in this chapter.
Uma Escola de Enfermagem para o Rio de Janeiro
Authors: Batista Ricardo dos Santos
Published: January 2024

Este artigo tem como objetivo analisar o processo de criação e funcionamento da Escola de Enfermagem do Estado do Rio de Janeiro entre 1943 e 1948. Compreende-se como agentes nacionais e internacionais interagiram no contexto da política da “Boa Vizinhança”. As fontes utilizadas foram documentos do Serviço Especial de Saúde Pública (SESP) e jornais, analisados a partir do paradigma indiciário proposto por Carlo Ginzburg. Conclui-se que, apesar de a Escola ter sido criada com o apoio de uma agência bilateral Brasil/Estados (SESP), os interesses do governo de Getúlio Vargas foram preponderantes.
In memoriam of Professor Bruno Bizzi (1927-2023)
Authors: De Stefano Valerio
Published: January 2024

In memoriam of Professor Bruno Bizzi (1927-2023)
Evaluation of Educational Environment Using the Dundee Ready Educational Environment Measure-12 – Abridged version of the Dundee Ready Educational Environment Measure-50 Questionnaire among Final Year M.B.B.S. Students in a Medical College in Ahmedabad
Authors: Mehta Ami , Mehta Karan , Mistry Neha , Mehta Vivek , Saiyad Shaista , Sheth Jay
Published: January 2024

Introduction:

Medical education in India is evolving/changing in view of implementation of new curriculum in undergraduate schools. Dundee Ready Educational Environment Measure (DREEM) is one of the tools developed specifically to assess the educational environment of medical institutions as perceived by the students. DREEM-12, an abridged version of DREEM-50 had been developed which retains its factors structure, validity, reliability and at the same time avoids respondent fatigue. We used the DREEM-12 questionnaire to assess final M.B.B.S students’ perception about their learning environment at our institute.

Materials and Methods:

A cross-sectional study was done including 215 undergraduate students from the final MBBS. The DREEM-12 questionnaire was shared with all the participants as Google form. The mean score for each variable was calculated. Variable scores were summed up to get each domain score and interpreted.

Results:

We received responses from 60% of students. The highest score was given to faculty’s encouragement towards learning with a mean score of 3.1. Least score - 2.1 was given to the stress support system for students. In the cumulative score, students’ perception of teacher (SPOT) was 8.8 which is interpreted as “model course organizers,” while student’s social self-perceptions was 4.7 which infers “not too bad.” The overall DREEM-12 score of our study is 33.1, which is indicative of a “More Positive than Negative” educational environment.

Conclusion:

The stress support system has the lowest score which suggests that efforts should be made to provide continuous psychological support to students may be in the form of periodical assessment by psychologists to find vulnerable ones early and provide them timely help. Items in SPOT are scored highest, pertaining to faculty’s knowledge about the subject and their encouragement to students about their learning. As this was the first-ever study done at this institute using DREEM-12 it can serve as a baseline to monitor the effects of changes made over a period of time.
Evaluation of Effectiveness of Self-directed Learning in 2nd Professional Year Medical Undergraduates
Authors: Sonar Samiksha J. , Gandhi Anuradha M. , Patel Prakruti Parth , Desai Chetna K.
Published: January 2024

Introduction:

Self-directed learning (SDL) is one of the recommended teaching–learning methods for Indian medical graduates to become a lifelong learner.

Methodology:

The study was conducted in 2nd year medical undergraduates. A lecture (Cholinergic Transmission and Cholinergic Drugs) was conducted followed by sensitization of students for SDL method and sharing of SDL topic (organophosphate poisoning). After 3 days, in the 1st SDL session, students were sensitized for SDL topic. A pretest (multiple-choice questions [MCQs] of SDL topic) was administered and resource materials were shared at its end. In intersession period, case-based scenarios, trigger words, and videos were shared in a preformed WhatsApp group. During the 2nd session, facilitators facilitated discussion of the topic in small groups of students using case-based scenarios. Posttest (MCQs) for students and feedback for students and facilitators were administered.

Results:

Data collected from 61 students showed a statistically significant difference between the means of posttest compared to pretest (standard error: 2.45, P < 0.05, confidence interval – 95%). Posttest scores showed that more than 45% of the students answered correctly 80% of questions, compared to pretest. More than 70% of students and facilitators agreed/strongly agreed that SDL makes topic interesting and effective for teaching/learning and leads to better student–teacher interaction. About 70% of students and 55% of facilitators found that SDL method should be implemented for more topics in curriculum. Learning issues faced by 21 students (need for more information resources, time-consuming method, difficulty in remembering dosage schedule, clinically correlating topic, and language barrier during discussion) were solved by students using of other online and offline information sources, revising the topic and discussing with co-learners.

Conclusion:

SDL was helpful for students in improving knowledge, communication skills, and analyzing case-based scenarios for any given topic.
Unusual Case of Xanthogranulomatous Mastitis with Florid Ductal Epitheliosis, Masquerading Clinically as Neoplastic Breast Lesion
Authors: Chandanwale Shirish Sahebrao , Raj Akshi , Londhe Mangesh , Chouhan Prachi
Published: January 2024

Xanthogranulomatous inflammation is a rare form of chronic inflammation characterized by the presence of lipid-laden macrophages, multinucleate giant cells, and chronic inflammatory cells. It is an uncommon finding in the breast. Obstruction, infection with low-virulence organisms, defective lipid transport, autoimmune disorders, and allergic reactions have been implicated. Very few reports of xanthogranulomatous mastitis (XGM) have been reported in which coexistent benign and malignant lesions have been found. Clinical presentation of XGM is variable. Many patients present with pain and breast lumps. The lesions can mimic benign or malignant breast neoplasms clinically and radiologically which warrant a pathological diagnosis either by core or excisional biopsy. Histopathology examination is the key for diagnosis. Surgical excision is the choice of treatment. Larger lesions can be treated conservatively with antibiotics before surgical excision.