bluuebunny/crossref_metadata_2025 huggingface dataset:
Vector fields created by Fourier transform of video signals
Authors: Bogoslovsky A.V. , Sukharev V.A. , Zhigulina I.V. , Pantyukhin M.A.
Published: November 2021

The power spectrum and autocorrelation are widely used in video signals processing. The phase-frequency spectrum contains more information than the amplitude spectrum. However, the amplitude spectrum is used more often in the video signal process. It is possible to combine the advantages of these two spectra to obtain a vector function such as phase-energy spectrum. This spectrum is sensitive even to a small difference in pixel brightness but at the same time it is as stable as the power spectrum. In this paper, we explored the properties of the phase-power spectrum and related amplitude of partials vector field. We showed that phase-power spectrum has conservative as well as solenoidal components and so it creates curl’s vector field. We also found the components of phase-power spectra that contain pixels with a different degree of contrast on the uniform background. We showed the possibility to use solenoidal component of the phase-power vector field to find the circulation (i.e. field work). We concluded that the circulation along any of brightness contour constants, which is symmetrical to the origin, is equal zero. We explored two-dimensional vector field of the phase-power spectrum. Finally, we determined an effect of pixels with different degree of brightness and their relative position to the image’s edges on vector field’s components formation.
Numerical and Experimental Predication of the Structural Cracking Within Reinforced Concrete Structure due to Conventional State of Loading
Authors: Mohammed Hussam Ali , Jaaz Hussein Abad Gazi , Naser Ali Fadhil , Mohammed Ayad Ali
Published: November 2021

It has been well understanding that the occurrence of various crack patterns in the building during its construction life (from first time of construction up to finishing) then subjected to super imposed load or during the service life. Cracks developed due to exceeding of stresses more than the allowable strength, wherever happened on building component. This research works used the finite element method as a powerful tool to simulate the behavior of full constructed building with both concrete system and brick bearing wall. Where the adopted numerical procedure allows to the users to predict the response of building elements due to conventional state of loading. one of the most important response features was the cracking phenomenon, where the numerical model shown that its capability to predict the cracking sequence from the first time of initiating. The prediction of full response and behavior of each element and their connection, shown that the precise of factor of safety used by the designer, where the analysis prove that the design load was about 67% from the cracking load, and the ultimate load was about 260% from the design load. That will allow more sustainability and stability for long time deformation. Beside the numerical solution, there was an experimental part of study, where site investigation, it shown that all data recorded was constant values and the building was stable. Actually, with no increasing of loading, the building reach its stable state, and defect will not develop. That basically because of good design within conventional state of loading.
Clinical Profile and Outcome of Multiple Organ Dysfunction Syndrome (MODS) in a Tertiary Care Centre of Manipal, Karnataka
Authors: Marijayanth Manthappa , Horatti Ashok , Tandure Varsha , Dhanse Suheil
Published: November 2021

BACKGROUND To study the clinical profile and outcome of multiple organ dysfunction syndrome (MODS) in previously healthy adult patients and to assess the correlation between sequential organ failure assessment (SOFA) score at admission and mortality in these patients. METHODS This study was conducted at a tertiary care hospital attached to a medical college of south India. This was a prospective observational study. All adult patients presenting with multiple organ dysfunction syndrome between October 2010 and June 2012 were selected for the study. SOFA score was recorded for all the patients at the time of admission. Patients were followed up till the time of death or discharge. RESULTS In this study, majority of the cases were males and belonged to middle age group. Epidemic diseases such as scrub typhus and leptospirosis were the most common causes of MODS. Fever was the most common presenting symptom of MODS. Majority of patients recovered. Higher SOFA score at admission is associated with increased mortality, duration of hospital stay, requirement of ventilatory support, haemodialysis, and central venous access. CONCLUSIONS Infectious diseases are responsible for most cases of MODS. Higher SOFA score at admission is associated with increased morbidity and mortality. Majority of people recover with appropriate treatment. KEYWORDS MODS, Clinical Profile, SOFA Score, Outcome
Correlation between Sociodemograpic Charecteristics and Clinicopathological Presentation of Oral Squamous Cell Carcinoma: A Crossectional Study from a Tertiary Care Cancer Centre, Odisha.
Authors: Behera Paresh Kumar , Panda Sasmita , Samanatar Subrat Kumar , Dash Sashibhusan
Published: November 2021

Background: Oral squamous cell carcinoma (OSCC) is significantly higher in India as about 70% of the cases are reported in the advanced stages leaving five-year survival rates around 20% only. Primary prevention and early diagnosis were found to be novel approaches to avert cancer cases and related deaths. In India, organized prevention and early detection efforts are still lacking.
Aim and objectives: To investigate the correlation between sociodemographic characteristics and clinicopathological presentation of oral squamous cell carcinoma.
Materials and methods: Single hospital-based crossectional retrospective study was carried out at the Department of Head and Neck Oncology, Acharya Harihar Post Graduate Institute of Cancer, Cuttack for a period of three years from October 2018 to September 2021.
Results: A total of 418 cases of histopathologically confirmed OSCC were reported during this study period.  There were 314 (75.11%) male and 104 (24.88%) female patients. The mean (± SD) age of the patients was 52.29 ± 13.37 years with ranging from 21 to 89 years. When checked for the association between tumor stage (early stage I/II and late-stage III and IV) and sociodemographic characteristics,we found middle age male,rural residency,low soccioeconomic status,illiteracy, chewing gutkha  7-10 numbers per day more than 10 years, were significantly associated with the late-stage tumors. Similarly, tumor at left buccal mucosa and border of tongue, moderately and poorly differentiated tumor, underlying Type 2 diabetes, diagnosis more than 10 months after the onset of symptoms were significantly associated with late stage presentation.
Conclusion: There is an important need to initiate public awareness programs in our region to control and prevent oral cancer by screening for early diagnosis and supporting a tobacco-free environment.
Parents and Students' Response to Distance Learning (Google Classroom)
Authors: Renoningtyas Novida , Kusumawati Erna Risfaula
Published: November 2021

This study aims to determine the response of parents and primary students to distance learning based on google classroom during the Covid-19 pandemic. The method used in this study is a qualitative method with data collection in the form of interviews, documentation, and observation. The results showed that both students and their parents objected to using google classroom as a learning media for distance learning activities. According to their explanation, the use of Google Classroom requires strong network access to open or send assignments, besides that data packets also run out quickly due to the use of this distance learning application. For students and parents who have difficulty, an alternative to overcome this is to send assignments via WhatsApp to the teacher concerned.
MENJAGA KUALITAS MANAJEMEN PENDIDIKAN ISLAM DI MASA COVID 19
Authors: Arifana Mohammad
Published: November 2021

This article wants to discuss how the management of Islamic education in maintaining the quality of learning in the midst of the Covid-19 pandemic. Islamic education during a pandemic must have the right management because Islamic education is not only concerned with intellectual issues but also about spiritual issues. The purpose of Islamic education is a starting ethic, so automatically the management of Islamic education must be correct. During the pandemic, the management carried out by the Ministry of Religion and its staff launched a planning, management and supervision by means of online learning. Implementers of each school along with supervision and parents and peers are the most core supervisors in Islamic education. By using qualitative methods based on previous research and several books as primary and secondary sources, it is hoped that it can make a big contribution to Islamic education and scientifically there is an image of a new file taste for future scholarship.
KEPEMIMPINAN OTORITER DALAM MANAJEMEN PENDIDIKAN ISLAM
Authors: S Suriagiri
Published: November 2021

The type of leader becomes an important entity in the management of islamic education. Surely, then, ongoing leadership should have a particular type of leadership that is expected to be able to bring wealth to the institutions or organizations it leads. As the educational organizers have already known that good leadership will deliver institutions to good qualities as well. As for this research, it focuses on the existence of authoritarian leadership in islamic education management. The study aims to identify forms of authoritarian leadership and the effect of its application in islamic institutions, and in this study researchers use a qualitative descriptive approach by reviewing the related literature. The results of the study indicate that authoritarian leadership is not appropriate to be adopted within islamic institutions for long periods of time, given that the good effects they have are very small and are more dominated by adverse effects. Researchers have thus revealed that it is necessary to recondition to eliminate and exclude the presence of this type of authoritarian leadership within the islamic institutions of education.
Model perilaku pencarian informasi (analisis teori perilaku pencarian informasi menurut David Ellis)
Authors: Purnama Rendi
Published: November 2021

Introduction. This paper will discuss about information seeking behavior. Information is the target that is sought after by all people. The amount of information becomes a necessity for humans. This information need refers to the public or users who really need information. Information needs can be used for all circles without exception. From this information need, information seeking behavior will arise as a means of seeking information to obtain the information you want to find. Behavior Information behavior is a pattern of human behavior in terms of the nature of information, both in the involvement of using and in the search for information. The behavior referred to here is how a person gets information through his behavior.Data Collection Methods. The method used in this paper is literature study where the data sources of this paper are books, magazines, journals and references related to information seeking behavior according to David Ellis so that it can be analyzed carefully. The process of collecting data goes through 3 processes, namely editing, organizing and findingData Analysis In this paper, the author analyzes the data using the opinion or theory of David Ellis in information seeking behavior as the main referenceResults and Discussion. Information seeking behavior according to David Ellis has several characteristics including starting as the initial stage in information search, chaining which is the stage to browse literature through quotes from books or journals, browsing which is the tracing stage, differentiating which is the screening stage of the sources obtained.,monitoring as a means of monitoring developments, extracting as a means of continuing the search, verifying which is the stage of checking the information that has been obtained, and finally ending as a cover for searching and searching for information.Conclusion. Based on the findings, David Ellis shows that  there are 8 characteristics of information seeking behavior, namely starting chaining browsing, differentiating monitoring, extracting, verifying ending.
Peningkatan Kemampuan Dekorasi Keramik Metode Contextual Teaching and Learning SMK Negeri 3 Kasihan
Authors: Sulastri Ening
Published: November 2021

Kemampuan siswa dalam mendekorasi benda keramik belum terlihat secara maksimal. Hasil dekorasi peserta didik tidak mendukung segi estetik benda yang digunakan, siswa masih kesulitan menerapkan kaidah-kaidah/unsur-unsur dekorasi yang meliputi bentuk, balance, proporsi, unity dan harmonisasi. Kesulitan pada saat mewujudkan motif ornament dan kurang memahami karakter media/bahan benda yang didekorasi. Tujuan penelitian ini yaitu meningkatkan kemampuan siswa pada pembelajaran mendekorasi keramik dengan metode Contextual Teaching and Learning (CTL) melalui pengenalan jenis motif batik. Pada Siklus I belum  mencapai 75% siswa dapat menerapkan minimal 3 macam keteknikan pada pekejaan mendekorasi benda keramik dan pada Siklus II >75% siswa bisa menerapkan 3 keteknikan dekorasi, yaitu 10 siswa mengalami peningkatan dan 1 siswa mengalami kegagalan karena masih lemah disemua keteknikan. Penerapan metode pembelajaran Contextual Teaching and Learning dengan pemodelan Motif batik Geometris dan an Geometris dapat meningkatkan Kemampuan mendekorasi  keramik  dengan  teknik Clay Body Plastis pada siswa kelas XI jurusan Kria Keramik.
Pesan-Pesan Pendidikan Ibadah (Telaah Novel Sang Pencerah) Karya Akmal Nasery Basral
Authors: Muttaqin Ali , Normuslim Normuslim
Published: November 2021

Fokus penelitian ini menggali pesan pendidikan ibadah, hal ini sebagai usaha untuk melihat bagaimana pesan pendidikan ibadah yang ingin disampaikan pengarang kepada pembacanya tentang pendidikan ibadah. Pendekatan yang digunakan dalam mencari data pada penelitian ini adalah studi riset kepustakaan ( library research) dengan tahapan pokok yang menelusuri sumber-sumber data dari berbagai bacaan baik yang bersifat primer maupun yang bersifat skunder. Setelah penelusuran data dilakukan, maka akan dianalisis dengan menggunakan metode analisis data (content analysis). Hasil penelitian ini akan menemukan beberapa pesan ibadah yang ingin disampaikan pengarang kepada pembaca seperti pesan ibadah shalat, puasa, dan shadaqah.
The Educational and Learning Problematic at Senior High School
Authors: Santosa Tomi Apra , Zulyusris Zulyusri , Suwars Abi , Amalia Khodzijah Nur
Published: November 2021

This study aims to determine the problems of education and learning in SMA Negeri 12 Kerinci and SMA Negeri 7 Kerinci. The research used is qualitative research with library research methods. Data collection techniques are observation, interviews, and documentation. The data analysis technique is done by collecting articles, analyzing, and drawing a conclusion. The results of the study concluded that SMA Negeri 12 Kerinci experienced educational and learning problems, namely the lack of science laboratory facilities and infrastructure, the lack of computers for the Computer-Based National Examination (UNBK), and the lack of student activity in the teaching and learning process. SMA Negeri 7 Kerinci is experiencing educational and learning problems, namely the lack of management of school facilities and infrastructure and the lack of learning media in the teaching and learning process.
Experimental and DFT Computational Insights on the Adsorption of Selected Pharmaceuticals of Emerging Concern from Water Systems onto Magnetically Modified Biochar
Authors: YUNUSA Umar , UMAR Umaru , IDRİSS Sulaiman , IBRAHİM Abdulrahman , ABDULLAHİ Tahir
Published: November 2021

This work aimed to fabricate a magnetically modified biochar (MBC) through a one-step pyrolysis of Vitex doniana nut at 500 °C and investigate its feasibility for the removal of two pharmaceuticals, namely, amoxicillin (AMX) and trimethoprim (TMT) from aqueous environment. The textural characteristics, chemical composition and magnetic properties of the MBC were analyzed using Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The results demonstrated the successful incorporation of the magnetic particles in the biochar matrix. The specific surface area and average pore volume of the MBC were obtained as 108.90 m2/g and 2.98 cm3/g, respectively. The adsorption process was observed to be strongly pH-dependent, and equilibrium was attained within 1 h. The kinetic data favors pseudo-second-order model (R2 > 0.999), implying that the most plausible mechanism for the adsorption was chemisorption. The isothermal data was best fitted by the Langmuir model (R2 > 0.985), signifying that the process was mainly monolayer adsorption on homogeneous surface. The maximum adsorption capacity achieved for AMX and TMT was 41.87 and 55.83 mg/g at 303 K, respectively. The thermodynamic examination highlighted that the adsorption was feasible and accompanied with absorption of heat and increase of entropy for both the adsorbates. Furthermore, the MBC exhibited a good recycling capability such that the adsorption capacity decreases by ~ 25% after reuse for six cycles. Besides, the theoretical results based on density functional theory (DFT) calculations demonstrated that the TMT molecules (ΔE = 3.762 eV) are more reactive compared to the AMX molecules (ΔE = 3.855 eV) which correlates with the experimental observations.
Comparative Determination of Melittin by Capillary Electrophoretic Methods
Authors: AKAY Melda , KALAYCIOĞLU Zeynep , KOLAYLI Sevgi , BERKER Bedia
Published: November 2021

Bee venom from honey bees (Apis Mellifera L.) is known to have many pharmacological and biological properties. Melittin, a peptide consisting of 26 amino acids, is known as the main component of bee venom. The study aims to develop a rapid capillary electrophoresis method for separating and quantifying melittin in honeybee venom. Since melittin is a basic peptide, it will adhere to the capillary wall during separation. Two different methods were developed in this study for the capillary electrophoretic separation of melittin. As a first approach, a low pH buffer system was used. For the second approach, the capillary column was coated with a positively charged polymer (PEI). With both methods developed, the migration of melittin in the capillary was achieved by preventing wall adsorption. Melittin migrated in 6 min when the low-pH buffer system was applied, whereas its migration time is longer than 10 min in the PEI-coated capillary column. Thus, a low-pH buffer system was preferred for the analysis of the actual bee-venom sample. 100 mmol L-1 phosphoric acid/sodium dihydrogen phosphate system at pH 1.55 was chosen as separation buffer. As a conclusion, a fast and reliable method was developed for the determination of melittin in honeybee venom. The method was applied to an Anatolian bee venom sample to highlight the melittin amount. The melittin amount was found as 24.5 ± 3.4 g 100 g-1 in the bee venom sample.
Forschungsgruppe REMEMBER (Hg.) (2020). Erinnerung an den Holocaust im Religionsunterricht. Empirische Einblicke und didaktische Impulse. Stuttgart: Kohlhammer. ISBN 978-3-17-038912-0. 275 Seiten.
Authors: Hedenkamp Rebecca
Published: November 2021

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Witten, Ulrike (2021). Inklusion und Religionspädagogik. Eine wechselseitige Erschließung (Religionspädagogik innovativ 38). Stuttgart: Kohlhammer. ISBN 978-3-17-039650-0. 623 Seiten.
Authors: Tomberg Markus
Published: November 2021

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Design and Validity of Cognitive Conflict-Based Teaching Materials Integrating Virtual Laboratories to Improve Concept Understanding of Waves
Authors: Saputri Reni , Mufit Fatni , Gusnedi Gusnedi , Sari Silvi Yulia
Published: November 2021

Learning physics shows that students' understanding of concepts is still low, and there are misconceptions. One solution to overcome this problem is to create conflict-cognitive-based physics teaching materials that integrate virtual laboratories. The purpose of this research was to produce valid cognitive conflict teaching materials. The type of research was development research using the Plomp model. The preliminary research instruments were in the form of concept tests and questionnaires. Meanwhile, a self-evaluation sheet was used at the development stage, and a validation sheet used three validators. The self-evaluation data analysis technique used percentage techniques, while the validity used the Aiken's V formula. At the preliminary research stage, it was found that more than 30% of students experienced misconceptions, and 40% of students did not understand the concept. From questionnaires to teachers, it was found that learning was still teacher-centred, and ICT facilities had not been used optimally. At the development stage, a prototype of teaching materials was designed using the cognitive conflict-based learning model stages. The self-evaluation test results obtained a score of 85, which was categorized as very good, while in the expert review test, the value of all components was 0.81 was categorized as very valid and capable of being tested for practicality and effectiveness tests in learning.
The Effect of Multi-Stage Discussion with Google Classroom and WhatsApp in Learning Physics on Problem Solving Ability
Authors: Ningsih Sulistia , Suana Wayan , Suana Wayan , Sesunan Feriansyah , Sesunan Feriansyah
Published: November 2021

This research describes the effect of applying multi-stage discussion with Google Classroom and WhatsApp in learning physics on students' problem-solving abilities. Google Classroom media was used for large group discussions and WhatsApp for small group discussions. The design in this research used a pre-experimental design in the form of a one-group pretest-posttest design with apurposive sampling technique for three meetings on Newton’s Law of Motion with experimented classes with a total sample of 60 students. Data were analyzed using paired sample t-test.The results showed a difference in the average students’ problem-solving abilities before and after treatment with a Sig. (2-tailed) value of 0.000. After implementinglearning multi-stage discussion with Google Classroom and WhatsApp, students' problem-solving ability in the experimental class increased from the very low to moderate category with an average N-gain of 0.66. The highest increase occurred in theindicators of physics approach and mathematical procedure with an average N-gain of 0.71 and the lowest increase in thehelpful indicator description with an average of 0.63. This increase shows that the application oflearning multi-stage discussion with Google Classroom and WhatsApp on Newton's Laws of Motion has a moderate effect on students' problem-solving abilities.
The Effect of HOTS-Oriented Blended Learning Student Worksheets on Students' Cognitive Learning Outcomes on Work and Energy Materials
Authors: Hatiti Arca , Distrik I Wayan , Rosidin Undang
Published: November 2021

This study aims to determine the effect of HOTS-oriented blended learning student worksheets on students' cognitive learning outcomes on work and energy materials for class X MIPA at SMAN 1 Gadingrejo in the 2020/2021 academic year. The research design used is a quasi-experimental form of nonequivalent control group design. The sample in this study was class X MIPA 5 (experimental class) and class X MIPA 4 (control class). The experimental class was treated using HOTS-oriented blended learning worksheets, while the control class was treated using the HOTS-oriented student worksheets. The test instrument used is in the form of a description of 5 questions. Based on the research results that have been done, the average N-Gain in the experimental class is 0.46 in the medium category. In the control class, the average N-Gain is 0.34 in the medium category. The results of the independent sample t-test showed that the significant value of 0.05 was 0.002. It shows an effect of using HOTS-oriented blended learning student worksheets on students' cognitive learning outcomes on work and energy materials.
Project-Based Learning (PjBL)-STEM: Bibliometric Analysis and Research Trends (2016-2020)
Authors: Putri Maharani Ayu Nurdiana , Krisnaningsih Erina , Suprapro Nadi , Deta Utama Alan , Dwikoranto Dwikoranto
Published: November 2021

This study aims to analyze research trends related to PjBL-STEM topics in 2016-2020 through bibliometric analysis with the Scopus database. Based on the criteria, it obtained 1,169 documents. Microsoft Excel was used to analyze data and VOS viewer as a data visualization. The results showed that PjBL-STEM research is increasing every year. The USA contributes the most research in the world, Indonesia ranks second. Universitas Pendidikan Indonesia, Universitas Negeri Malang, Universitas Sebelas Maret, and Universitas Negeri Semarang are among the top affiliates in PjBL-STEM research in the world. Visualizing the trend of PjBL-STEM research in 2016-2020, there are three clusters, namely 1.) PjBL-STEM as a framework, 2.) PjBL-STEM as self-development, and 3.) Effects of PjBL-STEM research. The results of this study can help researchers related to PjBL-STEM research trends in the world and provide direction in further research.
Development of Physics Comic 'History of Physics Series: The Development of Atom'
Authors: Putri Maharani Ayu Nurdiana , Rohmah Anggi Aulidhia , Andriani Aretha Patricia , Suprapto Nadi , Admoko Setyo
Published: November 2021

The quality of education can be improved by developing learning methods, curriculum development, and learning media development. One of them is learning media in the form of comics. This research aims to develop physics comics and analyze the validity of learning media of physics comics on the historical material of atomic development.  The research was conducted using the R&D research model (Research and Development) with the 4-D model (Define-Design-Develop-Disseminate). Based on the stages, obtained learning media products that were declared eligible after validation by two high school physics teachers and an expert lecturer gained the average validity in the media component of 90.0%, the display of 89.2%, the material by 90.7%, and the language by 95.4%. In general, the student's responses to the use of physical comic learning media include comic physics can increase motivation in learning (88.6%), students prefer that physics learning uses comic media (88.9%), through comic media, students are introduced to atomic inventors (88.9%), and physics comics can help to understand the historical material of atomic development (83.3%). Based on the study results, learning media of physics comics on the historical material of atomic development deserves to be used in physics. The implication of this study can help other researchers as a reference related to the development of comic physics learning media.
Bibliometric Analysis of Multi Representation Based on Problem-Solving Skills Using VOSviewer
Authors: Krisnaningsih Erina , Nurdiana Putri Maharani Ayu , Irba Tsabitamia , Supapto Nadi , Deta Utama Alan , Hariyono Eko
Published: November 2021

The purpose of this study was to analyze the scope related to the subject of problem-solving skills based on multiple representation in 2016 – 2020 with 20 documents through bibliometric analysis. The research method used was a literature study through all the articles analyzed in this study. The articles were taken from the Scopus database with sampling in 2003 – 2020, resulting in 29 scientific work data exported in *.ris (RIS) and *CVS formats. Then, those data were processed using VOSviewer and Microsoft Excel. The results of publications in the last five years have increased. Indonesia is the dominant country in publicizing papers about this topic. Institutions from Germany managed to publish most of the documents about multi representation. Meanwhile, Poland is the origin country of the authors with most publications. The visualization of research trends on multi representation resulted in four main clusters: (1) multi representation related to students, representation, and learning processes (2) multi representation as a class (3) multi representation related to the problem (4) multi representation as a model and process. Meanwhile, Indonesian researchers are very active in contributing to this topic, in line with the number of publications by country, namely Indonesia.
Analysis of the Relationship Between Students' Discipline Attitude on Physics Student's Learning Outcomes
Authors: Putri Wita Ardina , Simamora Nadia Natalia , Iqbal Muhammad
Published: November 2021

This study aims to analyze whether student discipline affects physics learning outcomes in physics subjects at SMAN 8 Jambi City. The population in this study were all students of class X at SMAN 8 Jambi City. The sample of this study was students of class X IPA 1, X IPA 2, X IPA 3, totalling 79 students at SMAN 8 Jambi City. The regression test results stated that there was an influence between students' disciplined attitudes towards physics learning outcomes by 65%, while the remaining 35% was influenced by variables other than the variables studied. Based on the research results above, it can be concluded that there is a positive influence between learning disciplines on physics learning outcomes. Students who have a good discipline attitude will also experience an increase in obedience and perseverance in learning so that it has a good impact on learning outcomes. Vice versa, if students do not have a good learning discipline attitude, it will make students disorganized in the learning process and cause student learning outcomes to be not good.
SHORT-TERM RENTALS: HOW MUCH IS TOO MUCH – SPATIAL PATTERNS IN PORTUGAL AND LISBON
Authors: Antunes Gonçalo , Ferreira Jorge
Published: November 2021

Purpose - This paper analyses the growth of tourism in Portugal and in the municipality of Lisbon, with a focus on short-term rentals. Design - The paper begins with the statistical background of the tourism boom that occurred in Portugal in the 2010s. The central part of the paper concentrates on an analysis of the spatial distribution of short-term rental properties, consisting of two parts: i) observation of spatial patterns in Portugal, by NUTS II region; ii) analysis of the municipality of Lisbon, which accounts for 22% of all short-term rentals units registered in Portugal. Methodology - The spatial analysis was carried out within GIS, using an approach based on spatial statistics, with research that involves geographic data and big data. Approach - This study combines a qualitative and quantitative approach. It begins with a theoretical review on the growth of tourism and short-term rental in the last decade, followed by a quantitative-spatial analysis to the case of Portugal and the municipality of Lisbon, and ending with reflections that combine the results of the practical analysis with the most recent literature on the impacts of tourism in Lisbon Findings - The paper ends with some reflections on the excessive concentration of short-term rentals in urban areas and their positive and negative externalities on urban life. The results suggest that the city center presents the highest concentration of short-time rentals, but not the highest concentration of beds. It also shows that the excessive concentration of short-term rentals units may cause serious negative externalities that affect the quality of life in its multiple dimensions. Originality - The results and the final discussion of this paper contributes to a greater knowledge of the spatial distribution of short-term rentals in Portugal and Lisbon and to debate the future of short-term rentals in cities that are among the world’s leading tourism destinations.
Computer modeling and numerical studies of peptide nanotubes based on diphenylalanine
Authors: Bystrov Vladimir Sergeevich , Filippov Sergey Valer'evich
Published: November 2021

The work is devoted to computer studies of the structural and physical properties of such self-organizing structures as peptide nanotubes based on diphenylanine dipeptide with different initial isomers of the left and right chiralities of these dipeptides. The structures under study are considered both with empty anhydrous and with internal cavities filled with water molecules. Molecular models of both ring and helix structures are investigated, which are consistent with the known experimental data. To study the effect of nano-sized clusters of water molecules embedded in the inner hydrophilic cavity on the properties of nanotubes (including the changes in their dipole moments and polarizations), as well as the changes in the structure and properties of water clusters themselves (their dipole moments and polarizations), the surfaces of internal cavities of nanotubes and outer surfaces of water cluster structures for both types of chirality are analyzed. Including using a specially developed method of visual differential analysis of structural features of (bio)macromolecular structures. The obtained results of calculations of a number of physical properties (polarization values, etc.) are given for various cases and analyzed in comparison with the known data. These data are necessary for analyzing the interactions of water molecules with hydrophilic parts of nanotube molecules based on diphenylalanine, such as COO- and NH3+, since they determine many properties of the structures under study. A number of the obtained data are planned to be used for further analysis of the possible adhesion and capture of certain medical molecular agents (components) by active layers of diphenylalanine-based nanotubes, which can be useful for creating capsules for targeted delivery of pharmaceuticals and drugs on their basis.
Hand Roundtable: Basal Joint Arthritis
Authors: Gocke Thomas V , Harris Michael , Pingeton Mallory , Cloutier Dagan
Published: November 2021

The purpose of the JOPA Roundtable discussion is to give orthopaedic physician assistants insight on how each participating editorial board member treats certain clinical scenarios in their current practice. For this Hand Roundtable, editorial board members with expertise in upper extremity will discuss basal joint arthritis. Participants will share their knowledge and experience on the topic.
Surgical Treatment of Femoroacetabular Impingement
Authors: Vahedi Hamed , Yacovelli Steven , Diaz Claudio , Parvizi Javad
Published: November 2021

Background:

Femoroacetabular impingement (FAI) is a well-known cause of hip pain and dysfunction in young adults. Surgical treatment has been widely popularized during the past decade. However, most reported results have been limited to short-term and intermediate-term follow-up. The long-term success rate and risk factors for failure are largely unknown. This study aimed to report the long-term (minimum, 10 years) clinical outcomes of surgical treatment of FAI and to describe the clinical and radiographic parameters associated with the failure of treatment involving femoroacetabular osteoplasty (FAO) and labral repair.

Methods:

Using our prospective hip preservation database, 164 patients (178 hips) who had undergone FAO between January 2005 and April 2009 were identified. Patient demographic characteristics, clinical history, duration of preoperative symptoms, radiographic parameters (preoperative and postoperative alpha angles, hip dysplasia and retroversion, Tönnis grade for osteoarthritis), and intraoperative findings were reviewed and compared between the success and failure groups. At a minimum 10-year follow-up, clinical functional outcomes (modified Harris hip score [mHHS] and Short Form-36 [SF-36] at 6 weeks, 6 months, 1 year, and 10 years) and failure rates (conversion to total hip arthroplasty [THA]) were collected.

Results:

The mean patient age (and standard deviation) was 34.3 ± 8.4 years, and 65 patients (40%) were female. After the surgical procedure, there was significant improvement in the mean mHHS (59.3 ± 7.3 points preoperatively to 88.4 ± 7.3 points postoperatively) and the mean SF-36 (61.3 ± 8.4 points preoperatively to 89.1 ± 7.2 points postoperatively). At a mean follow-up of 12.5 years, 12% (22 hips) required conversion to THA, with a mean time to THA of 5.3 ± 2.0 years. Older age, longer preoperative symptomatic period, higher preoperative and postoperative alpha angles, presence of hip dysplasia, a higher Tönnis grade, joint space narrowing, and a full-thickness acetabular chondral lesion at the time of the FAO were identified as risk factors for failure and conversion to THA.

Conclusions:

Patients with symptomatic FAI who undergo a surgical procedure experience pain relief and functional improvement that appear to endure over a decade in the majority of patients. This study on a relatively large cohort with a long-term follow-up has also identified patients who are at a higher risk for treatment failure.

Level of Evidence:

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
Patient-Reported Outcomes and Factors Associated with Achieving the Minimal Clinically Important Difference After ACL Reconstruction
Authors: Nwachukwu Benedict U. , Sullivan Spencer W. , Rauck Ryan C. , James Evan W. , Burger Joost A. , Altchek David W. , Allen Answorth A. , Williams Riley J. ,   the HSS ACL Registry Group
Published: November 2021

Background:

Analyzing outcomes and the minimal clinically important difference (MCID) after anterior cruciate ligament reconstruction (ACLR) is of increased interest in the orthopaedic literature. The purposes of this study were to report outcomes after ACLR at medium to long-term follow-up, identify the threshold preoperative outcome values that would be predictive of achieving the MCID postoperatively, and analyze outcome maintenance at medium to long-term follow-up after ACLR.

Methods:

Active athletes who underwent ACLR were identified in an institutional ACL registry. Patient-reported outcome measures (PROMs) were administered preoperatively and at the 2-year and >5-year postoperative follow-up; measures included the International Knee Documentation Committee (IKDC) form, the 12-item Short Form Health Survey (SF-12) Physical Component Summary (PCS) and Mental Component Summary (MCS), and Lysholm scale. We calculated the MCID from baseline to each of the 2 follow-up periods (2-year and mean 7.7-year). Logistic regression was performed to investigate factors associated with achievement of the MCID.

Results:

A total of 142 patients (mean follow-up, 7.7 years [range, 6.6 to 9.1 years]) underwent ACLR. The mean age and body mass index at the time of surgery were 27.2 ± 13.0 years and 23.2 ± 3.0 kg/m2, respectively. Final postoperative outcome scores improved significantly from baseline for the IKDC (50.9 ± 14.7 to 87.9 ± 11.2), SF-12 PCS (41.6 ± 8.9 to 55.6 ± 3.2), and Lysholm scale (62.2 ± 17.6 to 90.5 ± 10.3) (p < 0.0001), while the SF-12 MCS did not improve significantly (54.2 ± 8.0 to 54.4 ± 6.0) (p = 0.763). Between 2- and >5-year follow-up, the SF-12 PCS showed significant improvement (54.6 ± 4.5 to 55.6 ± 3.2; p = 0.036), while no change was noted in the IKDC (87.6 ± 11.1 to 87.9 ± 11.2), SF-12 MCS (55.5 ± 5.3 to 54.4 ± 6.0), and Lysholm scale (89.8 ± 10.6 to 90.5 ± 10.3) (p ≥ 0.09). At the time of final follow-up, the MCID was achieved by 94.7% of patients for the IKDC, 80.8% for the Lysholm, 79.0% for the SF-12 PCS, and 28.2% for the SF-12 MCS. At 2-year follow-up, 95.3% of patients were either “very” or “somewhat” satisfied with their surgery, compared with 88.6% at the time of final follow-up.

Conclusions:

We found a high level of maintained function following ACLR. The IKDC, SF-12 PCS, and Lysholm scores improved significantly after ACLR at the time of final follow-up and were not significantly different between follow-up periods. Approximately 95% and 89% of patients reported being satisfied with the outcome of surgery at the 2-year and final follow-up, respectively.

Level of Evidence:

Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
Hydrocarbon Gas Flooding Optimization considering Complex Fracture Networks through Numerical Simulation in the Tight Oil Reservoirs
Authors: Qin Yong , Zhang Haochuan , Liu Chang , Ding Haifeng , Liu Tianyu , Sun Yu , Tang Yong
Published: November 2021

Field data indicates that oil production decline quickly and the oil recovery factor is low due to low permeability and insufficient energy in the tight oil reservoirs. Enhanced oil recovery (EOR) is required to improve the oil production rates of tight oil reservoirs. Gas flooding is a good means to supplement formation energy and improve oil recovery factor, especially for hydrocarbon gas flooding when CO2 is insufficient. Due to the permeability in some areas is too low, the injected gas cannot spread farther, and the EOR performance is poor. So multifractured horizontal well (MFHW) are usually used to assist gas injection in oilfields. At present, there are few studies on the optimization of hydrocarbon gas flooding parameters especially under the complex fracture network. This article uses unstructured grids to characterize the complex fracture networks, which more realistically shows the flow of formation fluids. Based on actual reservoir data, this paper establishes the numerical model of hydrocarbon gas flooding under complex fracture networks. The article conducts numerical simulation to analyze the effect of different parameters on well performance and provides the optimal injection and production parameters for hydrocarbon gas flooding in the M tight oil reservoir. The optimal injection-production well spacing of the M tight oil reservoir is about 800 to 900 m. The EOR performance is better when the total gas injection rates are about 0.45 HCPV, and gas injection rates of each well are about 3000 to 3500 m3/d (0.021 to 0.025 HCPV/a). The recommended injection-production ratio is about 1.1 to 1.2. This work can offer engineers guidance for hydrocarbon gas flooding of the MFHW with complex fracture networks. Hydrocarbon gas flooding in tight oil reservoirs can enhance oil recovery. The findings of this study can help for a better understanding of the influence of different parameters on hydrocarbon gas flooding in the M tight oil reservoir. This work can also offer engineers guidance for hydrocarbon gas flooding of the MFHW with complex fracture networks.
Assessing and Forecasting of Groundwater Level Fluctuation in Joypurhat District, Northwest Bangladesh Using Wavelet Analysis and ARIMA Modeling
Authors: Rashid Almamunur , Alamgir Mahiuddin , Ahmed Mohamad Tofayal , Salam Roquia , I Abu Reza Md. Towfiqul , Islam Aminul
Published: November 2021

Groundwater resource plays a crucial role for agricultural crop production and socio-economic development in some parts of the world including Bangladesh. Joypurhat district, the northwest part of Bangladesh, a crop production hub, is entirely dependent on groundwater irrigation. A precise assessment and prediction of groundwater level (GWL) can assist long-term GWR management, especially in drought-prone agricultural regions. Therefore, this study was carried out to identify trends and magnitude of GWL fluctuation (1980-2019) using the Modified Mann- Kendall test, Pettitt’s Test, and Sen Slope estimators in the drought-prone Joypurhat district, northwest Bangladesh. Time-series data analysis was performed to forecast GWL from 2020 to 2050 using the Auto-Regressive Integrated Moving Average (ARIMA) model. The findings of the MMK test revealed a significant declining trend of GWL, and the trend turning points were identified in the years 1991, 1993, 1997, and 2004, respectively. Results also indicate that the declining rate of GWL varied from 0.104 m/yr to 0.159 m/yr and the average rate of GWL declination was 0.136 m/yr during 1980-2019. The outcomes of wavelet spectrum analysis depicted two significant periods of the declining trend in Khetlal and Akkelpur Upazilas. The results obtained from the optimal identified model ARIMA (2,1,0), indicating that GWL will decline at a depth of 13.76 m in 2050, and the average declination rate of GWL will be 0.143 m/yr in the study area. The predicted results showed a similar declining tendency of GWL from 2020 to 2050, suggesting a disquieting condition, particularly for Khetlal Upazila. This research would provide a practical approach for GWL assessment and prediction that could help decision-makers implement long-term GWR management in the study area.
Age-dependent Lamin remodeling induces cardiac dysfunction via dysregulation of cardiac transcriptional programs
Authors: Kirkland Natalie , Whitehead Alexander , Hocker James , Beri Pranjali , Vogler Geo , Hum Bill , Wang Mingyi , Lakatta Edward , Ren Bing , Bodmer Rolf , Engler Adam
Published: November 2021

As we age, structural changes contribute to progressive decline in organ function, which in the heart acts through poorly characterized mechanisms. Utilizing the rapidly aging fruit fly model with its significant homology to the human cardiac proteome, we found that cardiomyocytes exhibit progressive loss of Lamin C (mammalian Lamin A/C homologue) with age. Unlike other tissues and laminopathies, we observe decreasing nuclear size, while nuclear stiffness increases. Premature genetic reduction of Lamin C phenocopies aging’s effects on the nucleus, and subsequently decreases heart contractility and sarcomere organization. Surprisingly, Lamin C reduction downregulates myogenic transcription factors and cytoskeletal regulators, possibly via reduced chromatin accessibility. Subsequently, we find an adult-specific role for cardiac transcription factors and show that maintenance of Lamin C sustains their expression and prevents age-dependent cardiac decline. Our findings are conserved in aged non-human primates and mice, demonstrating age-dependent nuclear remodeling is a major mechanism contributing to cardiac dysfunction.
The physical basis for ecohydrologic separation: the roles of soil hydraulics and climate
Authors: Finkenbiner Catherine , Good Stephen , Brooks Jacqueline , Allen Scott , Sasidharan Salini
Published: November 2021

The degree of water mixing in the critical zone is under intense debate. Field measurements of isotope ratios indicate varying degrees of separation between pools of water that supply streams and vegetation. The exact physical mechanisms behind ecohydrologic separation are unknown, but local conditions such as soil heterogeneities likely influence the extent of mixing and separation of subsurface water pools. Using a well-established soil physics model, we simulated if isotopic separations occur within 650 distinct configurations of soil properties, climatologies, and mobile/immobile soil-water domains. Simulations demonstrated separations in isotope ratios between storage and drainage waters during periods of high precipitation, soil water content, and drainage. Separations grew with larger immobile domains and, to a lesser extent, higher mobile-immobile transfer rates. Across soil types and climates, lower saturated hydraulic conductivity and higher rainfall rates amplified isotopic differences, illustrating how mobile and immobile domains interact with local conditions to physically result in subsurface separations. These results show how different critical-zone solute fluxes can be generated by representing contrasting transport dynamics in distinct domains across a range of soils and climate conditions.