Static Fluid Research Articles

Analysis of critical and creative thinking skills on the topic of static fluid physics with guided inquiry learning assisted by computer simulation

This study aims to analyze student’s critical thinking skills and creative thinking skills on the topic of static fluid physics using guided inquiry learning assisted by computer simulations. This type of research is a quasi experiment with the design of three groups pretest-posttest. The sampling technique uses cluster random sampling. Analysis of research data using multivariate analysis of variance (Manova). The results showed that student’s critical thinking skills and creative thinking skills on the topic of static fluid physics using guided inquiry learning assisted by computer simulations were better than using guided inquiry learning without assisted by computer simulation or conventional learning.

Analysis of Students Critical Thinking Ability using Models Scientific Inquiry

This study aims to analyze students critical thinking ability in Static Fluid material. This type of research is a quantitative descriptive study. The research subjects were students of class XI MIPA 1 in Senior High School 1 Kerajaan for the 2020/2021 academic year, totaling 30 students. Data analysis was carried out through a test of critical thinking ability in the form of description questions. The test instrument used was 7 items based on the indicators of Ennis ‘critical thinking ability (1995) which had been validated by expert lecturers. From the analysis of the results of students’ critical thinking ability using a model scientific inquiry In the Static Fluid material the average value was 79.52, and after being converted it was in the good category. Of the 30 students of class XI MIPA 1, 15 students (50%) have very good critical thinking ability; as many as 14 students (46.7%) have good critical thinking ability; and as many as 1 student (3.3%) had enough critical thinking ability. Thus it can be concluded that the use of the scientific inquiry model can improve the critical thinking ability sof class XI MIPA 1 SMAN 1 Kerajaan students.

Evaluation of science process skills of high school students in Tapaktuan City on static fluid material

This descriptive qualitative research aims to evaluate the profile of students’ physics process skills. This research was conducted at a secondary school in the city of Tapaktuan. The population in this study were all students of class X MIPA SMA in Tapaktuan. The sample in this study was grade X MIPA 3 students who tested 20 people. Data collection techniques were used in this study through a multiple choice test instrument. Profile of high school students ‘science process skills in Tapaktuan City, it can be concluded that: the average high school students’ science process skills in Tapaktuan City are low (less), 0% are in the high category, 25% are in the medium category, and 75% are in the low category. The achievement of each aspect of skill varies. In the aspect of observation, classification and interpretation of good categories, aspects of prediction, hypothesis, selection of variables, conducting experiments and communicating are in the sufficient category, while in aspects of asking questions, planning experiments and applying concepts are in the lacking category. The science process skills of high school physics students in Tapaktuan for each aspect of science process skills are still low, with an average percentage of 48.9%.

Combined macromolecule biomaterials together with fluid shear stress promote the osteogenic differentiation capacity of equine adipose-derived mesenchymal stem cells

BackgroundCombination of mesenchymal stem cells (MSCs) and biomaterials is a rapidly growing approach in regenerative medicine particularly for chronic degenerative disorders including osteoarthritis and osteoporosis. The present study examined the effect of biomaterial scaffolds on equine adipose-derived MSC morphology, viability, adherence, migration, and osteogenic differentiation.MethodsMSCs were cultivated in conjunction with collagen CultiSpher-S Microcarrier (MC), nanocomposite xerogels B30 and combined B30 with strontium (B30Str) biomaterials in osteogenic differentiation medium either under static or mechanical fluid shear stress (FSS) culture conditions. The data were generated by histological means, live cell imaging, cell viability, adherence and migration assays, semi-quantification of alkaline phosphatase (ALP) activity, and quantification of the osteogenic markers runt-related transcription factor 2 (Runx2) and alkaline phosphatase (ALP) expression.ResultsThe data revealed that combined mechanical FSS with MC but not B30 enhanced MSC viability and promoted their migration. Combined osteogenic medium with MC, B30, and B30Str increased ALP activity compared to cultivation in basal medium. Osteogenic induction with MC, B30, and B30Str resulted in diffused matrix mineralization. The combined osteogenic induction with biomaterials under mechanical FSS increased Runx2 protein expression either in comparison to those cells cultivated in BM or those cells induced under static culture. Runx2 and ALP expression was upregulated following combined osteogenic differentiation together with B30 and B30Str regardless of static or FSS culture.ConclusionsTaken together, the data revealed that FSS in conjunction with biomaterials promoted osteogenic differentiation of MSCs. This combination may be considered as a marked improvement for clinical applications to cure bone defects.

Pore-Scale Perspective of Gas/Water Two-Phase Flow in Shale

SummaryThe transport behaviors of both single-phase gas and single-phase water at nanoscale deviate from the predictions of continuum flow theory. The deviation is greater and more complex when both gas and liquid flow simultaneously in a pore or network of pores. We developed a pseudopotential-based lattice Boltzmann (LB) method (LBM) to simulate gas/water two-phase flow at pore scale. A key element of this LBM is the incorporation of fluid/fluid and fluid/solid interactions that successfully capture the microscopic interactions among phases. To calibrate the model, we simulated a series of simple and static nanoscale two-phase systems, including phase separation, a Laplace bubble, contact angle, and a static nanoconfined bubble. In this work, we demonstrate the use of our proposed LBM to model gas/water two-phase flow in systems like a single nanopore, two parallel nanopores, and nanoporous media. Our LBM simulations of static water-film and gas-film scenarios in nanopores agree well with the theory of disjoining pressure and serve as critical steps toward validating this approach. This work highlights the importance of interfacial forces in determining static and dynamic fluid behaviors at the nanoscale. In the Applications section, we determine the water-film thickness and disjoining pressure in a hydrophilic nanopore under the drainage process. Next, we model water imbibition into gas-filled parallel nanopores with different wettability, and simulate gas/water two-phase flow in dual-wettability nanoporous media. The results showed that isolated patches of organic matters (OMs) impede water flow, and the water relative permeability curve cuts off at water saturation [= 1–volumetric total organic carbon (TOC)]. The residual gas saturation is also controlled by the volumetric TOC, ascribed to the isolation of organic patches by the saturating water; therefore, the gas relative permeability curve cuts off at water saturation (= 1–volumetric TOC).

Study on Fluid Descends Vertically on Static Fluid Using Moving Particle Semi-Implicit Method

The process of fluid descend vertically on static fluid has been studied through experiment and simulation by using Moving Particle Semi-Implicit (MPS) method. MPS has been developed by Koshizuka and Oka (1996). MPS method is a particle method based on the Lagrangian calculation for incompressible medium and does not rely on grid system. This study has been done by doing simulation first then validated by experiment. Water and cooking oil were used in the experiment. This study was carried out to analyze distance and density influence in the height of static fluid bursting process. The experiments were conducted in an acrylic box with the dimension 150 mm x 40 mm x 30 mm and a bottle with height of 100 mm and the nozzle of bottle was 26 mm. The distance between nozzle and surface of fluid inside box is varied for 100 mm and 200 mm. The results show that in the same height, water will be more difficult to be moved than cooking oil because water has bigger density. The distance between nozzle and fluid surface inside the box will affect at the pressure which is received by the fluid. Higher distance will create higher pressure so that fluid inside the box will be moved easier and more fluid will split out to the box. It also gives some influence in the final condition of remaining fluid in the acrylic box.

The development physics e-module based PBL–Integrated STEM to improve higher-order thinking skills on static fluid material

One of the skills of the 21st-century in the era of the industrial revolution 4.0, namely higher-order thinking skills. According to TIMSS, high-level thinking skills in Indonesia are still low. Teaching materials that do not contain 21st-century skills will have an impact on the effectiveness of achieving competence in learning. This study aims to analyze the need for e-modules as teaching materials and to determine the teacher’s response to the STEM integrated e-module. This research uses mixed methods. This research was conducted in several high schools in the Lampung area with 20 physics subject teachers as the research subjects. Data collection techniques using questionnaires and interviews. The object of this research is high-level thinking, Problem Based Learning model, and STEM integrated e-module analysis. The results showed that teachers need e-modules as a learning resource that is integrated with STEM to improve higher-order thinking skills. The e-module is expected to be a learning resource that can integrate text, animation, video, and audio and can explain abstract concepts in physics learning. So, in further research, an e-module based on Problem Based Learning with STEM integration can be developed to improve high-level thinking skills.

Design of e-modules to stimulate HOTS on static fluid materials with the STEM approach

This study aims to develop an e-module to stimulate HOTS on static fluid material with the STEM approach. The research method uses the design of research and development (R&D) using the ADDIE model which consists of five stages, namely: analysis, design, development, implementation, and evaluation. This article reported two stages namely analysis and design. The instrument used in the form of a questionnaire of product needs analysis and practitioners’ validation sheets using a Likert scale. Source of data for needs analysis are senior high 40 school students and 18 physics educators in Lampung. Product design validation is carried out by qualified and professional physics educators in their fields with the Masters in Physics Education category. Data were collected using Google Form and analyzed using descriptive quantitative. The results showed that an e-module to stimulate HOTS on static fluid material was very needed in the field. In conclusion, the e-module design is very suitable for stimulating HOTS and can be done at the stage of developing an interactive e-module based on STEM to stimulate HOTS of students on static fluid material.

The Development of Teaching Material Based on Science, Technology, Engineering, and Mathematics (STEM)

This research is a development research that aims to describe a valid profile of STEM-based teaching material development, analyze students' responses to the development of teaching materials and analyze the effectiveness of STEM-based teaching materials to examine creative thinking skills. This research was conducted at SMAN 9 Makassar in class XI MIA 6 consisting of 32 students as respondents. STEM-based physics learning was carried out 5 times on static and dynamic fluid material. Learning activities contain four elements, namely science, technology, engineering and mathematics, and the STEM results made are making hydraulic bridges and simple mosquito sprays from used materials. The development model used was ADDIE which consists of analysis, design, development, implementation and evaluation. The ADDIE model is a development procedure carried out by producing a STEM-based physics learning product. The intended product is to produce a STEM-based physics teaching material, step-by-step. These steps are included in the teaching material that must be validated and ready to be used by the teachers in carrying out learning so that students can think creatively. The results showed the practicality of physics teaching material based on practical STEM. It was seen from the results of the responses of students and the responses of teachers who were in the very good category. Learning using STEM-based teaching materials is effective and can make students think creatively. This is shown in the fluency thinking indicator with a percentage of 74.58%, the flexible thinking indicator 71.25%, the original thinking indicator 81.56%, and the elaborative thinking indicator 82.03%, with an average percentage of 77.36% which is in the creative category.

Hyperbolically symmetric static fluids: A general study

We carry on a comprehensive study on static fluid distributions endowed with hyperbolical symmetry. Their physical properties are analyzed in detail. The energy density appears to be necessarily negative, which suggests that any possible application of this kind of fluids requires extreme physical conditions where quantum effects are expected to play an important role. Also, it is found that the fluid distribution cannot fill the region close to the center of symmetry. Such a region may be represented by a vacuum cavity around the center. A suitable definition of mass function, as well as the Tolman mass are explicitly calculated. While the former is positive defined, the latter is negative in most cases, revealing the repulsive nature of gravitational interaction. A general approach to obtain exact solutions is presented and some exact analytical solutions are exhibited.

Modelling the combined effect of surface roughness and topography on bacterial attachment

Bacterial attachment is a complex process affected by flow conditions, imparted stresses, and the surface properties and structure of both the supporting material and the cell. Experiments on the initial attachment of cells of the bacterium Streptococcus gordonii (S. gordonii), an important early coloniser of dental plaque, to samples of stainless steel (SS) have been reported in this work. The primary aim motivating this study was to establish what affect, if any, the surface roughness and topology of samples of SS would have on the initial attachment of cells of the bacterium S. gordonii. This material and bacterium were chosen by virtue of their relevance to dental implants and dental implant infections. Prior to bacterial attachment, surfaces become conditioned by the interfacing environment (salivary pellicle from the oral cavity for instance). For this reason, cell attachment to samples of SS pre-coated with saliva was also studied. By implementing the Extended Derjaguin Landau Verwey and Overbeek (XDLVO) theory coupled with convection-diffusion-reaction equations and the surface roughness information, a computational model was developed to help better understand the physics of cell adhesion. Surface roughness was modelled by reconstructing the surface topography using statistical parameters derived from atomic force microscopy (AFM) measurements. Using this computational model, the effects of roughness and surface patterns on bacterial attachment were examined quantitatively in both static and flowing fluid environments. The results have shown that rougher surfaces (within the sub-microscale) generally increase bacterial attachment in static fluid conditions which quantitatively agrees with experimental measurements. Under flow conditions, computational fluid dynamics (CFD) simulations predicted reduced convection-diffusion inside the channel which would act to decrease bacterial attachment. When combined with surface roughness effects, the computational model also predicted that the surface topographies discussed within this work produced a slight decrease in overall bacterial attachment. This would suggest that the attachment-preventing effects of surface patterns dominate over the adhesion-favourable sub-microscale surface roughness; hence, producing a net reduction in adhered cells. This qualitatively agreed with experimental observations reported here and quantitatively matched experimental observations for low flow rates within measurement error.

Design principles as cultural artifacts: Pedagogical improvisation and the bridging of critical theory and teaching practice

ABSTRACT The apparent disconnect between the theoretical breadth of critical pedagogies and practice-based research creates challenges for educators wanting to implement critical pedagogy frameworks. I offer a case-study of a critical arts after school program, Hip-Hop Learners, to explore the ways design principles functioned as cultural artifacts, mediating the relationship between critical theory and pedagogical practice. Drawing upon ethnographic and theories of action methodologies, the primary design principles of Hip-Hop Learners were apprenticing youth in domain practices and dispositions, supporting heterogeneity in learning pathways and interests, and fostering youth agency in shaping their learning trajectories. These design principles were most salient when educators responded to students’ needs in the moment, reflecting a practice called pedagogical improvisation. Pedagogical improvisation helped connect the theoretical value of the design principles to their pedagogical actuality, demonstrating how design principles were not static theoretical constructs but fluid and pedagogically contextual artifacts for expanding learning opportunities. These findings offer insights for supporting critical educators by interrogating 1) the exogenous and endogenous nature of design principles as cultural artifacts, 2) pedagogical improvisation to support critical reflection and praxis, and 3) the risks of replicating teacher-centered pedagogies.

Solution of Einstein’s Field Equations for the Static Fluid Sphere

In this paper we deals about some exact static spherical solution of Einstein’s field equations with Λ = 0 (cosmological constant) and p = ρ (taking suitable choice of g11 and g44). We have eψ = km5 4 and e−χ = l, which help to investigate the value of eχ. Here some previously known solutions are contained as a particular case. The explicit expressions for rotation, shear scalar of expansion and fluid velocity have also investigated. We get some previously known solution for distinct values of n. Here Λ = 0, this implies that Einstein element would degenerate into a line element of special relativity for flat space time. It also helpful to investigates solution for the perfect fluid core.

Identifikasi Penguasaan Konsep Materi Hukum Archimedes dan Hukum Pascal Berbantuan Quizizz

This article aims to reveal the mastery of concepts activated by respondents when answering questions related to Pascal's law and Archimedes law. This study used a survey method with a test instrument of 10 multiple choice questions on the topic of static fluids using Quizizz. The subjects used to research were physics students from semester 6 to high school students who had received static fluid material. The research was conducted online with a period of 10 days and obtained 34 respondents. The data analysis techniques used were quantitative and qualitative analysis with 51% of the results obtained showed that students were still low in mastering the concept of Pascal's law and Archimedes' law.

Reply to Comment by Peterie Et Al. on “Accelerated Fill‐Up of the Arbuckle Group Aquifer and Links to U.S. Midcontinent Seismicity”

AbstractPeterie et al. question one observation in our paper: associating pressure increases to injection volumes at distances of up to 25 km from an injection well. In this reply, we show that the comment misunderstands our analysis and the evidence that led to this conclusion. We also show that gauge‐depth‐corrected pressures, used by the authors to produce statewide pressure maps, are discrepant with the static fluid level data, provided in our original compilation and analysis. The discrepancies are a result of the pressure correction method employed, which naïvely substitutes formation pressure for bottomhole pressure to calculate wellbore fluid density. Their linearly interpolated pressure maps, based on sparse data, contain interpolation and extrapolation artifacts that contradict injection trends in the state, the Theis solution, and the superposition principle. We reiterate that pressure and static fluid level increases in Class I wells existed prior to 2013, most notably in central Kansas, where recent earthquakes are cited in the comment as evidence of a pressure plume emanating from the Kansas‐Oklahoma border, 90 km away. We show that the space‐time pattern of seismicity in this area is inconsistent with a northward propagating pressure plume and, instead, seismicity appears to be centered on and near a cluster of high‐rate injection wells, two of which are among the highest rate wells in the state. These observations, along with recent M4 + earthquakes during continued decreases in wastewater injection in southern Kansas and northern Oklahoma, question the usefulness of the comment for understanding and managing societally significant earthquakes.

The Effectiveness of the Module Static Fluid with Authentic Learning to Train Students' Problem-Solving Skills

Authentic learning includes the necessary foundation in learning physics. However, the limitations of the physics module based on authentic learning have an impact on the common problem-solving skills of students. Therefore, the purpose of this study is to analyze the effectiveness of a static fluid module with authentic learning to practice student problem-solving skills. This research is research and development using the 4-D model (Define, Design, Develop, Disseminate). Class trials using one group pre-test and post-test design. The subjects of the research trial were 33 students of class XB SMA in Banjarmasin. The data were obtained through tests of problem-solving skills. The results showed that the module was effective because the results of Mann Whitney test were sig. = 0.00; means there is a significant increase in problem-solving skills. Also, the students' problem-solving skills were in the very good category. Thus, a static fluid module with authentic learning is effective for practicing student problem-solving skills.

Needs Analysis of Student Workshop Based on Discovery Learning on Static Fluid Materials In Palangka Raya

Needs analysis is important before developing a product. The purpose of this research is to find out: 1). 11th grade physics material which is considered difficult by students 2). Teaching materials used in learning physics; 3). Knowing the need to develop student worksheets based on discovery learning This research is a quantitative descriptive study. The samples in this study were physics teachers and 11th grade students of Senior High School 10 Palangka Raya as many as 22 people. The results of this study are: 1). Physics material that is considered difficult by students is static fluid material with the percentage of students who choose this material is 77%. 2). The teaching materials used by teachers in physics subjects are modules, student worksheets and textbooks with the largest percentage selected being textbooks, which is 82%. 3). Students want student worksheets that have an attractive appearance, are easy to understand and lead to discovery learning, so as many as 100% feel the need to develop discovery learning-based student worksheets.

Dissolution and Shrinking of a Single Microbubble in Stationary Liquid with Surfactants

AbstractFor a variety of applications of microbubbles, it is necessary to clarify the dissolution dynamics and the lifetime of a microbubble. Although various models have been proposed, predicting the dissolution rate of a microbubble in a static fluid with a surfactant is still difficult. In this study, dissolution behavior was predicted with taking into account the mass transfer inhibition effect due to a surfactant at the bubble surface. The shrinking behavior of an oxygen microbubble was observed with several surfactants and the experimental results were in good agreement with model predictions.

Classification of non-conformally flat static plane symmetric perfect fluid solutions via proper conformal vector fields in f(T) gravity

The aim of this paper is to classify non-conformally flat static plane symmetric (SPS) perfect fluid solutions via proper conformal vector fields (CVFs) in [Formula: see text] gravity. For this purpose, first we explore some SPS perfect fluid solutions of the Einstein field equations (EFEs) in [Formula: see text] gravity. Second, we utilize these solutions to find proper CVFs. In this study, we found 16 cases. A detailed study of each case reveals that in three of these cases, the space-times admit proper CVFs whereas in the rest of the cases, either the space-times become conformally flat or they admit proper homothetic vector fields (HVFs) or Killing vector fields (KVFs). The dimension of CVFs for non-conformally flat space-times in [Formula: see text] gravity is four, five or six.

Monolithic and partitioned approaches to determine static deformation of membrane structures due to ponding

This paper proposes monolithic and partitioned methods to calculate the static deformation of a membrane structure due to a given volume of ponding water. The partitioned methods involve coupling of a structural solver for membranes and a volume-conserving solver, modeling static incompressible fluid. Two methods of this type are proposed, either using coupling iterations with convergence accelerator between structural solver and volume-conserving solver or adding the linearized fluid behavior in the structural solver in addition to the external coupling iterations. The monolithic methods solve the system of structural equations under hydrostatic load with the volume conservation behavior of the fluid included in the Newton-Raphson (N-R) iterations of the structural solver. One such method was already discussed in the literature and updates the free surface plane to conserve volume exactly after every N-R iteration. In the second, new monolithic method, the volume conservation constraint is added as an additional equation and solved together with the structural equations. It was found that the partitioned method used with a quasi-Newton convergence accelerator was very robust but slower than the monolithic methods. On the other hand, the new monolithic method proposed in this paper was found to be both computationally efficient and robust.