bluuebunny/crossref_metadata_2025 huggingface dataset:
Clinical Outcomes of Different Warfarin Self-Care Strategies: A Systematic Review and Network Meta-Analysis
Authors: Dhippayom Teerapon , Boonpattharatthiti Kansak , Thammathuros Treeluck , Dilokthornsakul Piyameth , Sakunrag Itsarawan , Devine Beth
Published: October 2021

Aim To compare the effects of different strategies for warfarin self-care.

Methods PubMed, EMBASE, CENTRAL, CINAHL, ProQuest Dissertations & Theses, and OpenGrey were searched from inception to August 2021. Randomized controlled trials (RCTs) of warfarin self-care, either patient self-testing (PST) or patient self-management (PSM), were included. Self-care approaches were classified based on the TIP framework (theme, intensity, provider): (1) PST ≥1/week via e-Health (PST/High/e-Health); (2) PST ≥1/week by health care practitioner (PST/High/HCP); (3) PST <1/week via e-Health (PST/Low/e-Health); (4) PSM ≥1/week by e-Health (PSM/High/e-Health); (5) PSM ≥1/week by patient (PSM/High/Pt); (6) PSM <1/week by patient (PSM/Low/Pt); and (7) PSM with flexible frequency by patient (PSM/Flex/Pt). Mean differences (MDs) and risk ratios (RRs) with 95% confidence interval (CI) were estimated using frequentist network meta-analyses with a random-effects model. The certainty of evidence was evaluated using CINeMA (Confidence in Network Meta-Analysis).

Results Sixteen RCTs involving 5,895 participants were included. When compared with usual care, time in therapeutic range was higher in PSM/High/Pt and PST/High/e-Health with MD [95% CI] of 7.67% [0.26–15.08] and 5.65% [0.04–11.26], respectively. The certainty of evidence was rated as moderate for these findings. The risk of thromboembolic events was lower in the PSM/Flex/Pt group when compared with PST/High/e-Health (RR: 0.39 [0.20–0.77]) and usual care (RR: 0.38 [0.17–0.88]) with low and very low level of evidence, respectively. There was no significant difference in the proportion of international normalized ratio (INR) values in range, major bleeding, and all-cause mortality among different self-care features.

Conclusion Patient self-care (either PST or PSM) by measuring INR values at least once weekly is more effective in controlling the INR level.
Respiratory and Gastrointestinal Management of an Infant with a Birth Weight of 258 Grams
Authors: Itoshima Ryo , Oda Arata , Ogawa Ryo , Yanagisawa Toshimitsu , Hiroma Takehiko , Nakamura Tomohiko
Published: October 2021

Today, more infants weighing less than or equal to 300 g are born, and they survive because of the improvements in neonatal care and treatment. However, their detailed clinical course and neonatal intensive care unit management remain unknown due to their low survival rate and dearth of reports. A male infant was born at 24 weeks and 5 days of gestation and weighed 258 g. The infant received 72 days of invasive and 92 days of noninvasive respiratory support, including high-frequency oscillatory ventilation with volume guarantee and noninvasive neurally adjusted ventilatory assist. Meconium-related ileus was safely treated using diatrizoate. Although the infant was diagnosed with severe bronchopulmonary dysplasia and retinopathy of prematurity requiring laser photocoagulation, he had no other severe complications. He was discharged 201 days postdelivery (3 months of corrected age) with a weight of 3.396 kg. Although managing infants weighing less than or equal to 300 g is difficult, our experience shows that it is possible by combining traditional and modern management methods. The management of such infants requires an understanding of the expected difficulties and adaptation of existing methods to their management. The management techniques described here should help improve their survival and long-term prognosis.
Push-Out Bond Strength of Composite Polymerization Methods with Universal Adhesive to Coronal Dentin
Authors: Moosavi Horieh , Rezaei Fatemeh , Fazli Mohammad , Rakhshan Farzaneh
Published: October 2021

Objective This in vitro study was aimed to determine the effect of composite polymerization methods with universal adhesive on push-out bond strength in coronal dentin.

Materials and Methods Using 48 healthy premolar teeth, the almost conical access cavities were excised to the canal entry. Cavity preparations were treated with a universal adhesive in the self-etch mode. Teeth were randomly divided into four groups (n = 12). It was used to restore the cavities with a bulk-fill composite; Tetric N-Ceram, a conventional composite; Filtek Z250, a dual-cure composite; Rebilda DC VOCO, and chemical cure composite; Master-Dent. After applying 10,000 thermal cycles, 1-mm incisions were made in coronal dentin, and slices were placed in a UTM machine in a special jig and tested for push-out bond strength at a crosshead speed of 0.5 mm/min. Data were analyzed using one-way analysis of variance and Games–Howell tests (p < 0.05).

Results The highest mean bond strength was of the conventional composite (18.36 ± 5.63) and the lowest mean of bond strength was for the dual-cure composite (5.10 ± 2.74). There was a significant difference among the means of bond strength for various composite resins curing (p < 0.001).

Conclusion The bulk-fill and conventional light-cured composites had higher bond strength than self- and dual-cured composite resins.
Einkaufsgesellschaften im Krankenhausbereich in Deutschland: Einkaufsgesellschaften, Krankenhäuser und Vergaberecht
Authors: Weyand Rudolf
Published: October 2021

Was Sie als Krankenhausleiter und Einkäufer wissen sollten – Fortsetzung
Amending soils of different pH to decrease phosphorus losses
Authors: Lizarralde C. A. , McDowell R. W. , Condron L. M. , Brown J.
Published: October 2021

Context Soils irrigated with wastewater are generally phosphorus (P)-enriched. P losses from these soils may impair surface water quality. However, wastewater applications also alter soil pH and P availability. Aims We investigated if amending soils with aluminium (Al), iron (Fe) or calcium (Ca) sorbents could decrease the potential for P losses despite altering soil pH and potentially increasing soil P availability. Methods Seven soils (pH 5.3–6.9) were incubated with lime, gypsum, hydrotalcite, alum sulfate, ferric sulfate, and ferric chloride at rates of 0:1, 0.25:1, 0.5:1 and 1:1 molar ratios of Al/Fe to P, and 0:1, 0.5:1, 1:1 and 5:3 for Ca to P, respectively. After 21 days pH and water extractable P (WEP) were measured. Key results In most cases the application of Al, Fe and Ca amendments decreased WEP in proportion to the rates applied. However, poor performance was noted when amendments were mismatched to soils altering their pH into the range where high soil P availability was expected. Of the amendments used, alum and iron sulfate were the most cost-efficient. However, even when optimised and applied to critical source areas the estimated cost-effectiveness of these amendments is still poor and may only be effective in the short term. Conclusions and implications We therefore recommend that other strategies such as inversion tillage bringing low P topsoil to the surface (and decreasing the potential for P loss by surface runoff) together with changes in the farm system to extract more P from the topsoil are the only strategies that will decrease the potential for P loss cost-effectively and in the long-term.
Experimental observation of the geostrophic turbulence regime of rapidly rotating convection
Authors: Bouillaut Vincent , Miquel Benjamin , Julien Keith , Aumaître Sébastien , Gallet Basile
Published: October 2021

Significance

Turbulent convection is the main process through which nature moves fluids around, be it in deep planetary and stellar interiors or in the external fluid layers of planets and their satellites. Laboratory studies aim at reproducing the resulting fully turbulent flows, with the goal of determining the effective transport coefficients to be input into coarse geophysical or astrophysical models. Crucial to these applications is planetary or stellar rotation, which competes with convective processes to set the emergent transport properties. Building on a recent experimental approach that bypasses the limitations of boundary-forced convective flows, we report laboratory measurements in quantitative agreement with the fully turbulent regime of rotating convection.
Online headline testing at a Belgian broadsheet
Authors: Vandendaele Astrid , Declercq Jana , Jacobs Geert , Verkest Sofie
Published: October 2021

In this chapter, we investigate the impact of recent
audience-monitoring tools on the (online) newspaper sub-editors’ task of
crafting headlines. We zoom in on how metrics have become part of the
newsmaking process and are now intrinsic to a larger foundation of more
collaborative, participatory and engaging practices. Drawing on digital data
and fieldwork, we analyse the back and forth between the sub-editors’
journalistic gut feeling, their awareness of ‘selling’ their brand ‘in the
right way’, and the need to gain clicks. Relying on a linguistic
ethnographic perspective (NT&T
2011), we address how sub-editors reflect on their changing
professional routines. By investigating how the sub-editors’ aim to position
themselves in tandem with their algorithmic tools is foundational to news
media today, we shed new light on how the use of audience engagement metrics
intertwines with long-standing journalistic practices and contribute to
global debates on the politics of technology and online participation.
Journalism now
Authors: Cotter Colleen , Drummond William J.
Published: October 2021

The social dimension behind the (re-)production of news
genre forms is examined in news reporting examples that present different
discourse outcomes in the “postfoundational” social world for whom the
prestige of news craft remains key (Cotter 2010). Stories in “legacy” journalism (New York
Times) are compared with the San Quentin News,
the oldest prison newspaper in the US (Drummond 2020). The SQN, while socially
marginal, reflects central values of journalism in its story forms and
demonstrates the direct link that media have with their audience. The NYT,
while socially central, is itself becoming marginalized in the broader media
context as traditional news stories assume less importance in everyday
meaning-making. Together, they show how foundational discourse parameters
shift or are reconfigured.
Epilogue
Authors: Macgilchrist Felicitas , Declercq Jana , Vandendaele Astrid , Jacobs Geert
Published: October 2021

In this epilogue, we look back at the contributions to
this volume which have shown how some newsmakers embrace the idea of collaborating
while others are more cautious in reaching out. There seems to be, however,
simply no avoiding participation. We explore whether this means giving up,
or at least redistributing, control. In doing so, we also point to a lacuna
in this volume, as it is invariably on journalists and other traditional
newsmakers whom we focus, rather than those who fall outside traditional
professional categories. We examine how stable the relationships in
collaborative newsmaking really are and, zooming in on the ambivalent notion
of collusion, how the contemporary design of newsmaking both enables
positive participation and enforces unwanted forms of engagement. We
conclude by reflecting on how participation, engagement and collaboration
are impacting other fields of society. The chapter points to the need for critical
reflection on the limits of participation and to new routes
for further research.
Shared understandings of the human–nature relationship in
encounters with small wildlife
Authors: Rauniomaa Mirka , Keisanen Tiina , Siitonen Pauliina
Published: October 2021

Drawing on video data and ethnomethodological
conversation analysis, the study focuses on sequences of human
action and interaction in which participants orient to small
wildlife within their nature-related activities outdoors. The
participants are family members, friends or participants on
organized outings, and they engage in activities such as trekking,
foraging and fishing. The study examines moments when small wildlife
become the focus of the participants’ talk and other action and when
the relationship between human beings and the natural world is thus
constructed in situ. The study considers how participants in such
moments display, pursue and achieve shared understandings about what
the appropriate ways of treating other living beings and, more
generally, conducting oneself in nature are.
Extending sequences of other-initiated repair in Finnish
conversation
Authors: Haakana Markku , Kurhila Salla , Lilja Niina , Savijärvi Marjo
Published: October 2021

This paper explores other-initiated repair, or more
specifically, extended repair sequences. In extended cases, the
repair turn does not immediately resolve the trouble, and the
speaker needs to produce a new repair initiation.

Drawing on a collection of 458 other-initiations of
repair in naturally occurring everyday interaction in Finnish, we
show how the distribution of the outcomes of different types of
initiations clearly differs. Typically, candidate understandings and
open class repair initiations do not lead to extended sequences,
whereas repeats (with question words) are more often followed by a
second repair initiation. The type of trouble, as well as the
typological specificity of different initiations, explains the
outcomes of the repair sequences.
Achieving the intersubjectivity of sensorial practices
Authors: Mondada Lorenza
Published: October 2021

Intersubjectivity is a crucial issue not only for how
participants in social interaction communicate and coordinate shared
projects, but also for how they engage in sensing the material world
around them while they are jointly acting in that world. This paper
offers an ethnomethodological and conversation analytic study of
sensoriality that provides for a multimodal interactional analysis
of sensory practices. On the basis of a video-recorded beer tasting
session, I show how, far from being limited to individual and
neuro-physiological processes, situated activities of sensing are a
collective accomplishment here and now, emerging within joint
activities of searching, finding, and sharing relevant features of
taste, building agreements, and overcoming divergent views.
Movement synchrony as a topic of empirical social interaction
research
Authors: Stevanovic Melisa , Himberg Tommi
Published: October 2021

In this chapter, we consider movement synchrony from two
different perspectives. On the one hand, we report a small-scale
empirical study to test the hypothesis that movement synchrony is a
sequential phenomenon, which serves as a demonstration of how
conversation analytically informed research on participants’
unconscious tendencies to synchronize their body movements could
proceed in practice. On the other hand, we consider movement
synchrony through three closely related, yet essentially different,
conceptual lenses: conditional relevance, dialogic resonance, and
affordance. We suggest that a specific combination of the insights
provided by these three conceptual tools would make conversation
analytically informed study of movement synchrony both possible and
fruitful.
Learning to request in interaction
Authors: Laakso Minna
Published: October 2021

This study examines intersubjective development of
children’s requests in home interactions of Finnish-speaking
1–5-year-old children with their caregivers, siblings and peers.
Children’s early requests emerge sequentially through the
caregivers’ co-construction of the children’s early vocalizations,
word-gesture combinations and two-word utterances. Children’s first
linguistically explicit requests, imperatives, also rely on
intersubjective understanding between the child and the caregiver.
Children start to use conditional verb forms and interrogatives as
social adaptations for making requests to equal peers. Between one
and five years, children’s requesting develops from embodied,
co-constructed action to distinct linguistic formulations.
Caregiver interaction supports the children’s reliance on
co-participants’ co-operation in fulfilling requests whereas peer
interaction enhances children’s intersubjective understanding of
co-participants’ varying commitment and entitlement to grant the
request.
How an improvised scene emerges in theatre rehearsal
Authors: Savijärvi Marjo , Ihalainen Laura
Published: October 2021

This paper investigates how a group of young adults
participating in theatre rehearsals construct a spontaneous
improvised scene. The analysis shows how the youths construct a
fairly coherent scene in a situation in which the interactional
moves and the interactional frame emerges. We analyse how the
improvisation is initiated, how it is carried forward, and how the
scene is discussed afterwards. After the improvised scene, it
emerged that the participants had differing conceptions of what
exactly they had been doing. However, these differing conceptions
did not hinder them from participating and contributing to the scene
in coherent ways and were thus sufficiently similar for practical
purposes. In our analysis, we focus on how the youths constructed
the scene by recycling lexemes, syntactic forms and embodied
actions.
Omega‐3 index and AA/EPA ratio as biomarkers of running‐related injuries: An observational study in recreational runners
Authors: Davinelli Sergio , Intrieri Mariano , Ali Sawan , Righetti Stefano , Mondazzi Luca , Scapagnini Giovanni , Corbi Graziamaria
Published: October 2021

The aim of this study was to examine the association between biomarkers of polyunsaturated fatty acids (PUFA), such as omega‐3 (ω‐3) index and arachidonic acid (AA; 20:4 ω‐6)/eicosapentaenoic acid (EPA; 20:5ω‐3) ratio (AA/EPA), and the prevalence of running‐related injuries (RRI) in a cohort of recreational runners. We performed a retrospective, observational study of 275 non‐elite runners (mean age: 41.20 ± 12.47 years) who were not supplemented with ω‐3 fatty acids. The training characteristics and RRI were recorded over a period of 12 months through a self‐reported questionnaire. Using whole blood samples collected by finger prick, PUFA were quantified by gas chromatography and ω‐3 index and AA/EPA ratio measured. A total of 191 RRI cases were reported, with an injury prevalence rate of 50.9% in the overall population. The injured runners ran a significantly greater weekly distance than uninjured subjects (53.54 ± 25.27 km/week; p = 0.007). In a multivariate regression analysis, the lowest number of RRI was associated with higher values of ω‐3 index (β = − 0.237; 95% CI – 0.308 to – 0.164; R 2 = 0.172; p < 0.0001), while a higher AA/EPA ratio was correlated with higher number of RRI (β = 0.019; 95% CI 0.007–0.031; R 2 = 0.038; p = 0.003). This study identifies ω‐3 index and AA/EPA ratio as potential parameters associated with the risk of RRI. Future research is needed to confirm these results and apply specific nutritional strategies to successfully modify these biochemical variables.

Trial registration: ISRCTN.org identifier: ISRCTN12847156.
Machine learning algorithm for decoding multiple subthalamic spike trains for speech brain–machine interfaces
Authors: Tankus Ariel , Solomon Lior , Aharony Yotam , Faust-Socher Achinoam , Strauss Ido
Published: October 2021

Objective. The goal of this study is to decode the electrical activity of single neurons in the human subthalamic nucleus (STN) to infer the speech features that a person articulated, heard or imagined. We also aim to evaluate the amount of subthalamic neurons required for high accuracy decoding suitable for real-life speech brain-machine interfaces (BMI). Approach. We intraoperatively recorded single-neuron activity in the STN of 21 neurosurgical patients with Parkinson’s disease undergoing implantation of deep brain stimulator while patients produced, perceived or imagined the five monophthongal vowel sounds. Our decoder is based on machine learning algorithms that dynamically learn specific features of the speech-related firing patterns. Main results. In an extensive comparison of algorithms, our sparse decoder (‘SpaDe’), based on sparse decomposition of the high dimensional neuronal feature space, outperformed the other algorithms in all three conditions: production, perception and imagery. For speech production, our algorithm, Spade, predicted all vowels correctly (accuracy: 100%; chance level: 20%). For perception accuracy was 96%, and for imagery: 88%. The accuracy of Spade showed a linear behavior in the amount of neurons for the perception data, and even faster for production or imagery. Significance. Our study demonstrates that the information encoded by single neurons in the STN about the production, perception and imagery of speech is suitable for high-accuracy decoding. It is therefore an important step towards BMIs for restoration of speech faculties that bears an enormous potential to alleviate the suffering of completely paralyzed (‘locked-in’) patients and allow them to communicate again with their environment. Moreover, our research indicates how many subthalamic neurons may be necessary to achieve each level of decoding accuracy, which is of supreme importance for a neurosurgeon planning the implantation of a speech BMI.
Four Tier Test (FTT) Development in The Form of Virtualization Static Fluid Test (VSFT) using Rasch Model Analysis to Support Learning During the Covid-19 Pandemic
Authors: Anggraini N , Iswanto B H , Wibowo F C
Published: October 2021

This study aims to develop a valid and reliable test instrument. The test instrument developed is a Four Tier Test (FTT) in a Virtual Static Fluid Test (Test) on Static Fluid material using the Rasch model analysis. The method used in this research is the method of research and development with the 4D model. This research produces an educational product in the form of an FTT in the form of VSFT. The items developed in this study amounted to 20 items. The validation results from several experts gave an average score of 88.13% with very good criteria. The CVR value for each item is 1, while the CVI value is 1 with very good criteria. The validation results from several educational practitioners gave an average score of 89.58% with very good criteria. The results of the Rasch Model analysis showed that the test instrument is accepted, the reliability of all the items has good criteria, all the items are valid and divided into three difficulties, also each item is not biased towards gender differences. The results of the analysis of student misconception showed that only 4.68% of the students understood the whole concept, 23.42% of students only understood partially, 58.95% of students have a misconception, and 12.95% of students did not understand the concept at all. The conclusion of this study is that the FTT instrument in the form of VSFT is valid and reliable as an assessment instrument during the Covid-19 period, and also able to analyze student conceptions.
Virtual Test Instruments to Measure Scientific Literacy of High School Students on Work and Energy
Authors: Oktalia Y , Susila A B , Iswanto B H
Published: October 2021

Science literation is one aspect of assessment that is required in the K-13 curriculum. This study aims to describe the science literacy skills of high school students in the matter of effort and energy in learning physics and to determine the characteristics and quality of scientific literacy instruments using virtual test. The research method used is the 4D development method: Define, Design, Development, Disseminete. The scientific literacy test was validated by expert lecturers and physics teachers with CVI results in the very good category and CVR analysis in the valid category. The results of the analysis of the Rasch model show that the test instrument is accepted and can measure what it should measure. Research participants are tenth grade who has studied the concepts of work and energy. The virtual test contains scientific literacy skills which contain physics questions on the concepts of work and energy. The results showed that the scientific literacy skills of high school students were 65,2% for the contextual aspect, 65,1% for the knowledge aspect, and 69,5% for the competence aspect. Based on the research results, students’ scientific literacy skills are in the good category.
The effect of learning models and divergent thinking on higher-order thinking skills
Authors: Hidayati R , Supriyati Y , Budi A S
Published: October 2021

This study aims to determine the effect of interaction between Problem Based Learning models, Creative Problem-Solving models, and divergent thinking on high order thinking skills. The method used in this study is a quasi-experimental design with treatment by level 2x2. The sample number of this study is as many as 120 students of grade X high school. The sample was divided into two, namely the control class and the experimental class. The control class was given learning using the Problem Based Learning model while the experimental class used the Creative Problem Solving model by having high and low divergent thinking skills. Data about students’ high order thinking skills were obtained using a test in the form of an essay consisting of 5 questions and analyzed using the two-way ANOVA statistical test and the Tukey test as a follow-up test. The results showed that 1) there is a difference in high order thinking students who use the creative problem-solving model with students who use the problem-based learning model, 2) there is a difference in high order thinking skills between students with high divergent thinking ability with low divergent ability students and 3) there is an influence of interaction between learning model and divergent thinking ability to high order thinking skill.
Design of Massive Online Simulation (MOS) On Concept Archimedes’ Principle
Authors: Khofiya N , Wibowo F C , Delina M
Published: October 2021

In learning physics, Archimedes’ law is a physics material that is quite difficult and requires a deep understanding of concepts based on study files from several schools in Banten. As many as 96.4% of students need online simulation media using computers or androids to help study Archimedes Law material. The Massive Online Simulation (MOS) design is divided into six parts, namely the dashboard, home, materials, videos, simulations and quizzes. This study aims to design a media in the form of Massive Online Simulation (MOS) on Archimedes’ legal material. The method used is ADDIE (Analysis, Design, Development, Implementation and Evaluation). Research and development of the ADDIE model is carried out only up to the Design stage. This research can produce an attractive Massive Online Simulation (MOS) design that can be accessed anytime and anywhere.
Virtual Microscopic Simulation (VMS) for physics learning of the photoelectric effect in high school
Authors: Mandagi A F , Iswanto B H , Sugihartono I
Published: October 2021

The photoelectric effect is a physics concept that is often considered difficult by students because it contains abstract and microscopic concepts. So we need a medium that can visualize the concept of particle wave dualism on the photoelectric effect phenomenon microscopically. This study aims to produce “Virtual Microscopic Simulation (VMS)” as a medium for learning physics on the topic of the photoelectric effect in high school. The research method used is Research and Development with a 4D model (Define, Design, Development, and Disseminate). Validation of media feasibility has been carried out by several experts covering aspects of content and media with an average score of 77.2% and 75.7% with good categories. Based on the results of the expert validation test, it can be concluded that VMS can visualize the photoelectric effect process that is suitable for use as a medium for learning physics for students in high school.
The Development of Digital Comic As Learning Media Based On Picture-And-Picture Learning Model On Global Warming Materials During Distance Learning
Authors: Serevina V , Astra I M , Syahida A F
Published: October 2021

Global warming is an environmental physics material that studies the science of rising Earth’s temperature, which includes causes, effects and remedies. Digital comics as a learning media are simple media but can involve the material as a whole with interesting delivery. This study aims to develop learning media in the form of digital comics based on picture and picture learning models on global warming materials that are suitable for use during distance learning at the high school level. The method used in this research is Research and Development (R&D) with a 4D research model (define, design, develop, disseminate). The resulting product is in the form of a digital comic that is suitable for use in physics learning during distance learning and tested on 62 students. The feasibility test for learning media on global warming material was validated by media experts, material experts and learning experts using a validation test questionnaire. Then the trial was conducted with a number of students at the high school level. The expected result is that this learning media is feasible and effective for use in physics subjects at the high school level.
Evaluation of Blended Learning Program Physics of Mechanical Wave Materials Using CSE-UCLA Model
Authors: Sriwati  , Delina M , Supriyati Y
Published: October 2021

This study aims to obtain an overview of the blended learning program for physics subjects in mechanical wave material during the covid-19 pandemic, and to find out the supporting factors and obstacles so that they can be projected into solutions that are adaptive to the needs, availability and skills of students. The research method used is qualitative with an evaluative approach to the CSE-UCLA model. The subjects of this study were students of class XI IPA-1 and XI IPA-2, totaling 64 people at SMA Negeri 1 Timpah, Timpah Village, Central Kalimantan, Indonesia. Data were collected through questionnaires, interviews, observation and documentation. The data analysis procedure used Milles & Hubberman model analysis, including data reduction, data presentation, and drawing conclusions. Furthermore, the data and research findings were triangulated to check the validity of the data. The results of the program evaluation research from system assessment components, program planning, program implementation, improvement programs, and certification programs overall show that the physics blended learning program at SMA Negeri 1 Timpah supports the government’s policy in responding to the COVID-19 outbreak to learn from home, which is relevant to the supporting factors and obstacles.
Design of Massive Online Simulation (MOS) on kinetic theory of gases
Authors: Priane W T , Wibowo F C , Delina M
Published: October 2021

The purpose of this study was to design a Massive Online Simulation (MOS) to describe the behavior of gas particles to make it easier for students to understand the microscopic kinetic theory of gases. This research is a type of development research (Research and Development) with the ADDIE model consisting of analysis (analysis), design (design), development (develop), implementation (implement) and evaluation (evaluate). But, in this study, researchers only use the initial stage is the stage of an analysis and d design. The result of this research is the design of Massive Online Simulation (MOS) learning media on a gas kinetic theory which discusses monatomic, diatomic and polyatomic sub-materials, in which there is a main display menu, start menu, material menu, simulation menu and quiz menu that can be used. Students for learning the kinetic theory of gases.
Dissemination of GOOPI (Game Open Online Physics Instructional) to Sparking Innovation in Education
Authors: Wibowo F C , Sanjaya L A , Robby D K , Ahmad N J , Darman D R , Alizkan U , Fathurohman C , Prahani B K , Kurniawan B R
Published: October 2021

This study of dissemination of GOOPI (Game Open Online Physics Instructional) on page https://goopi.id/ (use UC browser) to sparking innovation in education. The method of the study is the Interactive Lecture Demonstration (ILD) approach, the ILD stages are carried out with three stages of activities, namely preparation, implementation, and evaluation. Dissemination with training for physics teachers who are members of the Physics Subject Teacher Meeting (PSTM) from a province in the west of Indonesia and Malaysian Teacher Association. The participants of this dissemination were 120 physics teachers for the first meeting and 86 teachers for a second meeting with GOOPI. The results of the study in the form of this dissemination were obtained information that physics teachers experienced in accessing and developing physics learning media. The results of the questionnaire responses to GOOPI with average 2,90 very good category of dissemination obtained information that GOOPI is effective for media for learning physics during the Covid-19 epidemic. The suggestion in this study is that dissemination training should be done frequently in order can provide skills or expertise that are not too complicated but are widely applied and needed by physics teachers.
Trends of Flipped Classroom Studies for Physics Learning: A Systematic Review
Authors: Amanah S S , Wibowo F C , Astra I M
Published: October 2021

This study focused to review the trends of the Flipped Classroom (FC) studies for physics learning. This review seeks to address the overall trends of the existing studies, contribution of integrated model or strategy and media into flipped classroom approach, the advantages of flipping classroom for physics courses, and the challenges of these studies. This structured review examined 33 article journal about flipped classroom for physics learning. The obtained data were analyzed using content analysis method. It was found that the studies in this field were generally carried out at undergraduate students, which pure flipped model, used discussion method and institution website for online media. The implementation of flipping classroom approach in a physics course yielded positive impact on student achievement when compared to traditional classroom. On the other hand, some challenges were identified, such as students’ challenges, teacher challenges, and technical challenges.
Problem Solving Ability of Distance Education Student on Electrostatic Topic
Authors: Safitri H , Hamidah I , Setiawan W , Kaniawati I
Published: October 2021

In this paper, we present the result of a study on the identifying problem-solving ability on distance education students’ physics. Descriptive-qualitative is used for method of research. The subjects of the study were in-service students’ physics of distance education. Sample were 19 students from all of student taking electricity and magnetism course in term 2019/2020. Essay test of electrostatics problem solving is used for collecting data technique. Test of problem solving is given at the beginning of the course in asynchronous tutoring of electric and magnetic cores. The finding of the study indicated problem solving ability of in-service students’ physics of distance education are categorized low (44,56%) in solving the problems. Therefore, it is necessary to make efforts to improve students’ ability to solve problems, through asynchronous tutorials by applying problem-solving strategies in interactive discussion and collaborative work in groups.
Development Of Android Physics Applications (APA) As Learning Media On Dynamic Fluid Concepts
Authors: Fathurohman C , Wibowo F C , Iswanto B H
Published: October 2021

Android is one of the learning media based on 21st-century learning styles. Android is open source and provides opportunities for users to develop other application features as needed. This study aims to create Android-based physics learning media using the Smart App Creator on Dynamic Fluid material. Media is developed using the methods of research and development R&D (Research and Development) Model FODEM (Formative Development Method) consisting of Need Analysis (NE), Implementation (I), and Formative Evaluation (FE). The results of the validity of the Android Physics Applications (APA) media obtained an average score of 83% in the very feasible category, while the results of the limited trial of students obtained an average score of 82.1% with the very good category. Based on these results, it can be concluded that the Android Physics Applications (APA) media can be used as a learning medium in the classroom. The development of Android-based Physics Applications is expected to be an alternative for educational institutions or educators to develop learning media that use multimedia.
Development of Educational Adventure Game on Fluid Physics Material
Authors: Muliyati D , Wahdaniyah N , Bakri F
Published: October 2021

An educational game is a form of technological progress that can be implemented in the field of education. This article describes the results of research on the development of educational games that can be used as an alternative mentoring for students. The method used in this research is the Research and Development (R&D) method with the ADDIE approach, which includes five stages, namely Analysis, Design, Development, Implementation, and Evaluation. An HTML5-based educational game has been created using Articulate Storyline 3. This educational game contains a person’s journey with the background of applying static and dynamic fluids and has several levels containing fluid for the next round. Material experts and media experts have validated the educational games produced. Experts provide a comprehensive opinion on all aspects assessed.
Permittivity Measurement Using the Resonance Circuits
Authors: Santosa I E
Published: October 2021

A pair of LC circuits has been used to demonstrate the resonance condition of electromagnetic waves. The first circuit comprises of an inductor, a capacitor and a power supply; while the second pair employs an inductor, a variable capacitor and a neon bulb. The same inductance is applied in both circuits. The variable capacitor is a parallel plate capacitor. By varying the capacitance in the second circuit, we achieve the resonance condition as indicated by the lit neon bulb. By doing so, we observe the equal oscillation frequency in both, the first and second circuit. The condition is then used to obtain the permittivity of air to be (6.1±0.2) x10-11 F/m.
Automatic Detection of Breast Calcification in Ultrasound Imaging with Convolutional Neural Network
Authors: Karunia P D , Prajitno P , Soejoko D S
Published: October 2021

Breast cancer is a common type of cancer that leading death causes of female in the worldwide. Breast calcification can be one of indicator that can be used to detect the breast cancer early. One of the preferred methods used by radiologist to detect breast cancer is ultrasound imaging. Ultrasound imaging is much safer than mammography that followed by radiological effect. However, ultrasound imaging contaminated with speckle noise that looks similar to breast calcification. It can be the cause of the long time diagnosis process. It encourages so many methods of computed aided diagnosis (CADx) that can detect abnormalities automatically. One of them is Convolutional Neural Network (CNN). CNN can be used to classify the normal breast and breast with abnormalities. In this paper, CNN has been proposed for the classification of the ultrasound images into normal breasts and breasts with calcification. Experimental results classification accuracy was 76 % and a sensitivity of 84.61%.
Integration of Borehole Image and Sonic to Evaluate Critically-Stressed Fractures to Optimize Production at FORGE Geothermal Field
Authors: Sulistyowati E , Haris A
Published: October 2021

Geothermal integration solutions as unconventional environment have workflows or methods that must be able to optimize existing data and be adapted to overcome existing challenges. The integration method consists of geology, Petrophysics and Geomechanics domains. Geological analysis to identify fractures, fracture classification, knowing the dip azimuth and the magnitude of the fracture, quantitative analysis (intensity, aperture and porosity) by using the wellbore image log. Petrophysics analysis is to distinguish open / healed fractures that analysed from sonic data. Fracture orientation analysed further for the stress calculation on fracture planes and to determine the effective fractures (most likely to flow) that has a high ratio of shear to normal stress. Geomechanical analysis in geothermal fields, among others, is to determine the dynamic permeability behaviour of fractures during the production / injection phase, determine the orientation and productive fracture interval. The integration is using FORGE well 21-31 in 8.5in section with depth interval 6,226 – 7,920 ft-MD and well 58-32 in 8.5in section with depth interval 7,390-7,527 ft-MD. Well 21-31 shows dominant fracture strike orientation to NNE-SSW, while Well 58-32 shows slightly different set strike orientation to N-S with minor striking to NE-SW and NW-SE. Evaluation of critically stressed fracture intended to have knowledge on production mechanism and based on analysis, fracture/fault that has high potential of shearing is striking to NNE-SSW and dipping to Westerly.
Synthesis of TiO2 from TiCl4 Using Morinda Citrifolia Root Extract as a Molecular Template and its Photocatalytic Activity to Methylene Blue Degradation
Authors: Rahman A , Afrizal  , Warden B , Slamet R
Published: October 2021

TiCl4 successfully as precursors for synthesised TiO2 in nanometer-sized through the sol-gel method on the variation of the concentration of root extract of M. Citrifolia and have shown photocatalyst activity to degrade methylene blue with UV radiation in 365 nm. The characteristics of TiO2 synthesized such as crystalline, size and morphology using SEM. SEM analysis showed that the morphology of TiO2 synthesized showed the spherical shape in the nanometer-sized. Examination of the energy bandgap using UV-Vis DRS showed a decrease bandgap for TiO2 synthesized (TiO2 Merck = 3.2 eV; TiO2 10x = 3:16 eV; TiO2 50x = 3.1 eV; TiO2 100x = 3.08 eV). The best degradation photocatalytic activity is demonstrated by TiO2 100x until 84.07%. The reaction rate of TiO2 photocatalytic for the degradation of methylene blue follow a pseudo-second-order reaction model.
Preliminary Study on The Effect of Time on Hydrogen Production from Electrolysis of The Seawater
Authors: Rustana C E , Sunaryo  , Salam I N , Sugihartono I , Sasmitaningsihhiadayah W , Madjid A D R , Hananto F S
Published: October 2021

To know the effect of electrode type on the production of hydrogen gas through the electrolysis of sea water, this research was conducted. At a constant potential difference of 12 Volt, the electrolysis process is carried out by alternately using graphite and copper as electrodes. The electrolysis process time was varied from 10 to 55 minutes with increments every 5 minutes for each electrode. The results showed that the use of copper in the electrolysis of sea water produced a maximum of 82 ml of hydrogen gas better than 76 ml of graphite with a total processing time of 5 hours and 25 minutes. The results also show that the production of hydrogen gas in graphite has the largest hydrogen production rate in the first 10 minutes, but continues to decline, while the copper electrode has the largest hydrogen production rate at 220 minutes and decreases when the electrolysis process reaches 270 minutes when the electric current experiences drop. This can be understood due to the corrosion of the electrode by chlorine, which causes the electrode life to be limited. Meanwhile, the water displacement measurement method is used to determine the volume of hydrogen gas produced from the electrolysis of seawater in this study.
The Effect of Voltage and Electrode Types on Hydrogen Production from The Seawater Electrolysis Process
Authors: Rustana C E , Sunaryo  , Muchtar S J , Sugihartono I , Sasmitaningsihhiadayah W , Madjid A D R , Hananto F S
Published: October 2021

Besides the limited supply, turns out the fossil fuels also causes carbon dioxide (CO2) pollution in the atmosphere and causing global warming. Therefore, renewable energy that environmentally friendly are needed, which is hydrogen gas considered capable of being an alternative to replace fossil fuels. One of many simple ways and effective to produce hydrogen gas is by electrolysis. Seawater was chosen in this research because of its abundant availability, have high efficiency and low cost to produce hydrogen gas. By varying the voltage from 1.5 volts to 24 volts with an increase of 1.5 volts, this research was conducted to determine the effect of the difference in voltage and type of electrode on the volume and rate of hydrogen production through electrolysis of seawater with constant time 10 minutes each. The type of electrode that used in this research are copper and graphite. The result showed that the productivity coefficient of copper electrodes was 0.41 ml with determination coefficient of 0.97; while, productivity coefficient of graphite electrodes was 0.32 ml with determination coefficient of 0.93. This research also shows that a maximum of volume hydrogen gas of 8.5 ml was produced through the electrolysis of seawater using copper electrodes at a voltage of 21 volts. This result is much greater than using the graphite electrodes that only produced a maximum volume of hydrogen gas of 7.1 ml at a voltage of 22.5 volts.
Polyvinyl Alcohol-based Hydrogel: A Systematic Literature Review on Thermal Properties by Differential Scanning Calorimetry
Authors: Putro P A , Sulaeman A S , Maddu A
Published: October 2021

The purpose of this systematic literature review (SLR) study is to assess the importance of thermal properties and the depth of analysis on Polyvinyl alcohol (PVA) -based hydrogel. Google Scholar is used as a search for database sources using Publish or Perish software, which is related to PVA-based hydrogel’s thermal properties from 2018 to 2020. Thermal properties are focused on the DSC thermogram characteristic. These results strongly indicate that PVA-based hydrogel’s thermal properties are very important and considered for their potential application.
Analysis of the Structure of Ceramic Materials of Clay, Mount Kelud Volcanic Ash and Sea Water
Authors: Nasution N J F , Sembiring K , Sitorus Z
Published: October 2021

Based on the durability of ancient roman buildings that are 2000 years old and are always exposed to sea waves. In which there is a mixed reaction of volcanic rock with seawater. Indonesia has many active volcanoes, this is because Indonesia is located at the confluence of the Eurasian and Indo-Australian tectonic plates. One of the mountains formed in the area where the plates meet is still active, the mountain is Mount Kelud. Mount Kelud is a volcano in the province of East Java, Indonesia, which is classified as active. The existence of volcanic ash resulting from the eruption of Mount Kelud is quite potential as a ceramic material. So the purpose of this research is to make a ceramic construction made from clay, volcanic ash from Mount Kelud and sea water by the method of die pressing and sintering at a temperature of 1000°C. So it can be known how the physical properties, mechanics and especially the crystal structure formed from ceramic samples. The results of the research that has been carried out are that the highest density value is in the composition of a mixture of 50% volcanic ash and 50% seawater, the highest compressive strength value is also found in the composition of a mixture of 50% volcanic ash and 50% seawater, and from the XRD results, the structure The crystal formed is hexagonal with the phase formed is SiO2.
PT symmetry and the evolution speed in open quantum systems 1
Authors: Brody Dorje C
Published: October 2021

The dynamics of an open quantum system with balanced gain and loss is not described by a PT-symmetric Hamiltonian but rather by Lindblad operators. Nevertheless the phenomenon of PT-symmetry breaking and the impact of exceptional points can be observed in the Lindbladean dynamics. Here we briefly review the development of PT symmetry in quantum mechanics, and the characterisation of PT-symmetry breaking in open quantum systems in terms of the behaviour of the speed of evolution of the state.