Boyle's Law Research Articles

The Feasibility and Practicality of a Simple Fountain Teaching Aid in Boyle's Law Material

Penelitian ini bertujuan untuk menguji kelayakan dan kepraktisan produk yang dikembangkan. Adapun produk yang dikembangkan berupa alat peraga air mancur sederhana yang berkaitan dengan konsep materi Hukum Boyle. Produk yang dikembangkan dalam penelitian menggunakan model 4D yang terdiri atas empat tahap yaitu define, design, develop, dan disseminate. Instrumen yang digunakan dalam mengumpulkan data berupa angket kelayakan dan angket kepraktisan. Kelayakan produk dinilai oleh 3 ahli sedangkan kepraktisan produk berdasarkan uji respon 36 siswa SMA Kelas X. Hssil penilaian validator menunjukkan bahwa produk yang dikembanhkan sangat layak sedangkan hasil uji respon peserta didik menujukkan bahwa produk yang dikembangkan sangat praktis. Sehingga dapat disimpulkan bahwa produk yang dikembangkan dalam penelitian ini berupa alat peraga air mancur sederhana layak dan praktis digunakan dalam proses pembelajaran fisika SMA Kelas X.

Development and Initial Evaluation of a Cost-Effective Force Sensor for Ureteroscopic Application.

Purpose: Retrograde intrarenal surgery is the gold-standard treatment for most kidney stones. During ureteroscopy, ureteral access sheath insertion at forces greater than 8.0 Newtons (N) risks high-grade ureteral injury. To monitor force, our institution utilizes a unique, Bluetooth-equipped device (i.e., the University of California-Irvine Force Sensor). Given the unique nature of the force sensor, we sought to develop an inexpensive and accessible force sensor based on Boyle's law and the specific amount of force required to compress an occluded 1.0 mL syringe. Materials and Methods: We evaluated three brands of 1.0 mL syringes. After setting the plunger at 1.0 mL, the syringe was occluded, and the syringe plunger was compressed. The syringe volume was recorded when the applied force on the plunger reached 4.0 N, 6.0 N, and 8.0 N. Multiple trials were performed to assess reliability and reproducibility. A method for applying this clinically was also developed. Results: The precise force thresholds identified for a 1.0 mL Luer-Lok™ Syringe (Becton Dickinson, Franklin Lakes, NJ) were 0.30 mL for 4.00 N, 0.20 mL for 6.00 N, and 0.15 mL for 8.00 N. The 1.0 mL Tuberculin Syringe and 1.0 mL Luer Slip Syringe were less precise, but compression from 1.0 to 0.40 mL, 0.25 mL, and 0.20 mL corresponded to force sensor readings that did not exceed 4.00 N, 6.00 N, and 8.00 N, respectively. Conclusions: Based on volume changes, 4.00 N, 6.00 N, and 8.00 N of force can be reliably and reproducibly achieved using an occluded 1.0 mL syringe.

Barotrauma of the ear and paranasal sinuses

With the increasing popularity of amateur scuba diving and the availability of commercial airplane flights, otorhinolaryngologists will increasingly encounter patients suffering from the effects of barotrauma. Barotrauma occurs according to the principles of Boyle's law, more precisely, due to the inability to equalize pressures within the body cavities. The pathophysiology of barotrauma of the ear and paranasal cavities is reviewed, as well as therapeutic options for prevention and treatment.

A conic programming approach to the wrinkling of pneumatic membranes using convex potentials

This paper presents a novel conic programming approach for modeling the wrinkling of isotropic hyperelastic membranes subject to nonlinear loading and finite strains, employing convex potentials derived from tension field theory. The incompressible neo-Hookean strain energy is recast as a minimization problem over a set of cones, with a semidefinite constraint on the deformed surface metric. To address pneumatic membranes, a linearized volumetric potential is introduced, reestablishing convexity for follower forces, and Boyle's law is expressed as a minimization problem over the exponential cone.The primal–dual interior point method solves the total potential energy minimization problem, with convergence verified using the analytical solution of a sheared planar membrane. The proposed model, applied to examples of increasing complexity, reveals intriguing membrane behaviors rarely discussed in existing literature. The method is shown to be robust, even when handling highly wrinkled membranes, which are challenging to address using direct nonlinear equilibrium analysis or nonlinear interior point methods.Implementation using high-level automatic code generation tools (FEniCS) results in concise, extensible code. The findings point to several avenues for future research, such as exploring complex material models, mesh refinement, dynamics, and parametric design. Additionally, the linearization process implies potential applicability of the methods to nonlinear problems beyond membrane mechanics.

A Review of Barotrauma from Diving: A Narrative Literature Review

Barotrauma is a trauma or wound that occurs in the organs of the body due to sudden changes in air pressure around either change in pressure in the air or underwater. This literature review aimed to describe barotrauma from a traumatology perspective. In the case of barotrauma, the pathophysiology will follow Boyle's law. Namely, there is a relationship between the volume of gas in a closed room and the surrounding environment. Barotrauma that occurs when the pressure drops are called a squeeze. Squeeze events occur when there is a space filled with air and a membrane with a supply of blood flow from arteries and veins and experience a sudden change in pressure. Manifestations of barotrauma can also occur in the teeth, spine, and joints due to sharp and rapid changes in pressure. Damage to the teeth can occur because air is trapped in the teeth or because the teeth are sensitive to pressure. Damage to the spine and joints can occur because the pressure causes the vertebral discs to shift or damage the joint tissue. In conclusion, barotrauma is damage caused by pressure differences in the body, especially in the ears, lungs, and sinuses. Deaths from barotrauma are commonly associated with diving, especially freediving and gear diving.

The measurement of deformation rate of flexible container based on constant conductance element in molecular regime

An innovative method using constant conductance element to measure the deformation rate of flexible container was proposed based on the theoretical model of dynamic micro-flow detection. The measurement system of dynamic deformation rate was built by using the semi-flexible container encapsulated with polyimide film, and a constant conductance element was installed between the flexible container and the pressure stabilizing chamber to provide a constant micro-flow rate. The dynamic differential pressure variation between the inlet and the outlet of the constant conductance element was measured and then the deformation rate of flexible container could be obtained through the iterative calculation of the measured differential pressure change over time. The results show that the deformation rate gradually decreases with the increase of differential pressure. In addition, Boyle's law was used to verify the experimental results of dynamic micro-flow detection method, and it is revealed that the measurement error is less than 11%. Finally, a standard leak element was applied to simulate the leak source of flexible container. The conductance of standard leak element and the leak rate of flexible container have been successfully predicted by using the measured deformation rate.

Middle school students' perception of the nature of science in the context of 'Boyle's Law' experiment

Middle school students' perception of the nature of science in the context of 'Boyle's Law' experiment

Modelling unsaturated silty tailings and the conditions required for static liquefaction

The potential for static liquefaction of tailings is a major focus in the design and operation of tailings storage facilities. This research models the behaviour of unsaturated tailings, with a variety of degrees of saturation, addressing the propensity for static liquefaction during monotonic loading. Unsaturated triaxial tests, including constant suction conditions and constant water–air mass conditions, were performed. A bounding surface plasticity model was used to simulate the results. The constant mass condition is relevant to undrained closed-system loading, which may prevail during fast deformation after the tailings becomes unstable, when the air and water in the pore space remain locked inside the tailings. Boyle's law and hydraulic hysteresis were accounted for to model the changes of pore air and water pressures, and suction, with the change in tailings volume. Good agreement was achieved between test results and model simulations. Additional simulations to mimic rising water tables under constant total stress states in the field, situations that may trigger instabilities, are also shown. Results are added to charts which relate peak and post-liquefaction strengths, as well as collapse lines, to measures of initial state, for unsaturated conditions, which may be of use in practice.

PENGEMBANGAN ALAT PERAGA AIR MANCUR SEDERHANA UNTUK MENINGKATKAN MINAT DAN MOTIVASI BELAJAR PADA MATERI HUKUM BOYLE

This study aims to develop teaching aids in the form of a simple fountain to increase interest and motivation in learning Boyle's law material. The research method used is the 4D method. then conduct a feasibility test using a questionnaire with an instrument consisting of 11 questions, 3 aspects, and 11 indicators. The three main aspects tested were feasibility, material suitability, and effectiveness, each of which earned a total score of 3.48, 3.51, 3.57 from the maximum score of 4.0. Based on the results of the due diligence which was attended by 64 respondents, the development of a teaching aid in the form of a simple fountain to increase interest and motivation in learning about Boyle's law material is very good so it is feasible to be used as a learning medium. However, it is necessary to emphasize the concept of Boyle's law so that the benefits of learning that students get can be felt.

Laser Measurement and Numerical Simulation of Elastomer Stopper Motion during High-Altitude Shipping of Pharmaceutical Syringes.

During high-altitude shipping of pre-filled syringes, pressure differentials can cause the elastomer stopper to move unintentionally. This motion represents a risk to container closure integrity and drug product sterility. To understand and quantitate this risk, we combined high-accuracy laser measurements and numerical simulations of stopper motion. We tested the effects of syringe barrel siliconization, stopper design, syringe orientation, and altitude rate on stopper displacement; only the siliconization factor had a significant effect. Our observations were compared with two mathematical models based on Boyle's Law and a force balance approach. For well-lubricated syringes, stopper motion was reasonably predicted by Boyle's Law (residual ≤ 10%). When the lubricant amount was reduced, Boyle's Law failed to accurately predict stopper motion (residual ≈ 40%). To simulate stopper motion more accurately, we developed a dynamic model in MATLAB-Simulink to incorporate the dry and viscous friction inherent to the lubricated interference fit. Using a Coulomb-viscous subroutine, deviations from Boyle's Law were successfully explained in terms of the displacement, but the system dynamics were not fully accurate. The combination of laser measurements and numerical simulation has yielded unique insight into stopper motion during high-altitude shipping. These tools can provide valuable input to a risk-based drug development strategy to enable global distribution of pre-filled syringes.

Routine Core Analysis (RCAL) Untuk Menentukan Porositas, Permebilitas, dan Saturasi Pada Batupasir (Sandstone)

The physical properties of basic reservoir rocks that are very important to know, especially in the oil and gas industry, include porosity, permeability and saturation. The three physical properties determine the economics of an oil and gas field, especially in the reservoir rock layer. Sandstone (sand) is a lithology that very common oil and gas reservoir rock. The research was conducted at a laboratory scale using three (3) core plug samples from conventional cores. The method used in the Porosity measurement is Boyle's law helium porosimeter, while for the measurement of saturation using the results of the Conventional Retort method. The results of his research are the porosity values of the three samples taken from an average value of 23.76%, which is in the very good (very good) category. Meanwhile, the permeability values of the three samples were taken from an average value of 211.67 mD which is also in the very good category. From the graph of porosity to permeability it shows a directly proportional relationship, then from the graph of porosity to depth of the three samples above it shows an inverse relationship, those are shown by the trendline but with a very low R2 value. This is possibly caused by two things, namely: lack of sample data, and too close sample interval so that it cannot be used as justification that porosity and depth are not reversed. Oil saturation values (So) and gas saturation (Sg) of the three samples were taken from the average values of 46% and 1.7%.

DEVELOPMENT OF A PHYSICS LEARNING ACTIVITY FOR THE TOPIC OF BOYLE’S LAW USING THE STEM APPROACH

This paper reports on the development of a Physics learning activity based on the STEM approach for the topic of Boyle’s Law and the tests conducted to determine its validity and feasibility. The population of this study was fifth-semester bachelor of education in Physics students from one of the public universities in Malaysia. Nineteen participants sampled using the simple random sampling technique. Two instruments used were self-developed questionnaire for determining the content validity of the learning activity and a feasibility questionnaire adapted from the Structured Assessment of Feasibility (SAFE) questionnaire. Most of the data on feasibility shows that the activity is feasible to be implemented in schools albeit will require extra teaching and learning time and cost compared to the usual teaching and learning time and cost allocated. The research successfully developed a tested learning activity based on the STEM approach for the topic of Boyle's Law that is quite feasible. This result implies that it can be used as a reference for teachers who are interested in conducting a STEM-based lesson with the awareness that the lesson will take more time and additional cost to implement.

Maxillary Sinus Barotrauma in a Silent Maxillary Sinus Syndrome Scenario: Case Report

Barosinusitis is defined as an entity where damage to a paranasal sinus occurs secondary to sudden changes in atmospheric pressure. These dysbarisms respond to Boyle's Law where -given constant temperature- the pressure of a gas is inversely proportional to its volume. On the other hand, silent sinus syndrome is a pathology with few case reports in which the paranasal sinus undergoes a remodeling of its bony walls generating, in the case of the maxillary sinus, a descent of the eyeball and a herniation of the fat of the pterygopalatine fossa. The symptoms in these patients are insidious, so the diagnosis is usually fortuitous. The authors report a case where a diagnosis of silent maxillary sinus syndrome was made after an episode of severe maxillary barosinusitis.

Analysis of the Concepts of Physics in Detective Conan's Animation Film

Detective Conan is an animated film genre originating from Japan. This study aims to analyze the concept of physics in several episodes in the film Detective Conan. The concept of physics in this film is contained in the phenomena that occur in it, so it is interesting to study. The type of research method used is the type of descriptive method. The research was carried out in the form of direct observation methods, namely watching animated episodes as well as data collection, literature studies and analysis of physics concepts to describe existing phenomena. Based on the results and discussion, it can be concluded that Detective Conan is a Japanese animated action genre film with the concept of the main character acting as a detective and is required to be able to solve all crime cases and puzzles so that they can be solved. Some of the physics concepts found in several episodes of Detective Conan are about Archimedes' law, Boyle's law, about temperature, perfect internal reflection, uniformly changing rectilinear motion and uniformly rectilinear motion, tyndall effect, electricity, dynamic electricity and up to parabolic motion. The study of the film Detective Conan is expected to be able to increase students' interest and abilities in learning physics. regarding temperature, perfect internal reflection, uniformly changing rectilinear motion and uniformly rectilinear motion, the Tyndall effect, electricity, dynamic electricity and up to parabolic motion. The study of the film Detective Conan is expected to be able to increase students' interest and abilities in learning physics. regarding temperature, perfect internal reflection, uniformly changing rectilinear motion and uniformly rectilinear motion, the Tyndall effect, electricity, dynamic electricity and up to parabolic motion. The study of the film Detective Conan is expected to be able to increase students' interest and abilities in learning physics.

Effect of Total Stress Path and Gas Volume Change on Undrained Shear Strength of Gassy Clay

Clay with free gas bubbles can be frequently encountered in the seabed. Gassy clay is an unsaturated soil, but its mechanical behavior cannot be described using conventional unsaturated soil mechanics because it has a composite internal structure with a saturated soil matrix and gas bubbles. The gas bubbles can have either a detrimental or beneficial effect on the undrained shear strength of clay. New lower and upper bounds for the undrained shear strength of gassy clay are derived by considering the effect of total stress path and plastic hardening of the saturated soil matrix. For the upper bound, it is assumed that there is only bubble flooding, and the shear strength of an unsaturated soil sample is the same as that of the saturated soil matrix. Bubble flooding makes the saturated soil matrix partially drained and increases the undrained shear strength. The amount of bubble flooding is calculated using the modified Cam-Clay model and Boyle's law for ideal gas. The lower bound is derived based on the assumption that the entire soil fails without bubble flooding and the gas cavity size evolves due to plastic hardening of the saturated soil matrix. Compared with Wheeler's upper and lower bounds that do not consider plastic hardening of the saturated soil matrix, the new theoretical results give a better prediction of the undrained shear strength of gassy clays, especially for the upper bound. Implications for constitutive modeling of gassy clay are discussed based on the new research outcomes.

Biofísica da respiração: uma proposta de abordagem com o uso de recursos educacionais digitais

Nas disciplinas de física destinadas a atender os cursos das áreas biológicas e da saúde no ensino superior duas realidades são encontradas, uma delas onde os conteúdos de física são pouco relacionados com os temas apresentados dentro da área de interesse do público ao qual se destina e a outra onde as disciplinas possuem uma estrutura que enfatiza a relação entre as áreas, ao discutir os princípios físicos que estão relacionados ao funcionamento de estruturas biológicas. A questão é que em ambas as situações não estão previstas ou planificadas, de forma acessível, aulas práticas que permitam a realização de atividades compatíveis com os conteúdos teóricos de biofísica, tornando-se improvável que elas ocorram de forma a dar conta das necessidades de aprendizagem dos estudantes inscritos nessas disciplinas. Deste modo é fundamental que existam materiais e recursos que contribuam com um papel mais ativo por parte dos estudantes para melhorar a aprendizagem, uma vez que a realidade atual é desfavorável para a compreensão adequada dos temas em biofísica. Assim, será apresentado aqui uma discussão das leis envolvidas nos processos respiratórios - Lei de Boyle, Lei de Henry, Lei de Graham – ao propor uma sequência didática, com a utilização dos recursos educativos digitais (REDs), focados em três simulações, que visam apoiar a compreensão das relações matemáticas que descrevem alguns fenômenos físicos descritos e dois pequenos vídeos, que buscam conectar algumas informações pertinentes do que está sendo abordado.

Development of 'Boyles Law Apparatus' Teaching Aids for Thermodynamics Course: Innovation in Teaching Methodology

Teaching aids are among the most important instruments in providing effective delivery results as well as the best understanding to students. Therefore, this teaching aid should also be in the Thermodynamics course and among the topics whose concept is quite difficult to understand by students is Boyles Law in the topic of Perfect Gas. Boyle's law is used to explain the inverse relationship between pressure and gas volume at a constant temperature. This law states that when the pressure of the container is filled with increasing gas, then the total volume will decrease. Boyles' Law on the topic of Perfect Gas is also one of the important topics and it is the basis in Thermodynamics. This paper is about the development of Boyle's Law Apparatus (BLA) teaching aids (TA) for the DJJ20063 Thermodynamics course at Port Dickson Polytechnic which is an apparatus that can explain to students related to the basic concepts of Boyle's Law. In addition, this teaching aids can also help lecturers in providing a better understanding to students who take Thermodynamics courses. The production of this tool is not only used by lecturers in the theory class but also this tool can also be used for practical needs in the laboratory. In conclusion, a suitable apparatus for explaining Boyle's Law to students has been successfully designed and developed. In this regard, hopefully the innovation of this teaching aids will be able to benefit all parties in improving the teaching and learning system, especially for Thermodynamics course.

Innovation in Teaching Methodology: Level of Student Acceptance of ‘Boyles Law Apparatus’ Teaching Aids in Thermodynamics Course

Boyle's law is used to explain the inverse relationship between pressure and the volume of gas at a constant temperature. This law states that when the pressured container is filled by increasing gas, thus the total volume will decrease. This research paper aims to study the level of student acceptance of teaching based on teaching aids (TA) Boyle's Law Apparatus (BLA) in the teaching and learning for the DJJ20063 Thermodynamics course. The questionnaire study was distributed to 66 respondents, namely Port Dickson Polytechnic‟s students of semester 2, Diploma in Mechanical Engineering program December 2019 session who involved in lectures where TA is used to give the students a clear vision in understanding the concept of Boyle Law in the topic of Perfect Gas. The data were analysed by using SPSS software through descriptive analysis statistics. The results of the study showed that the level of effectiveness of this TA is at a high level with an average mean score of 3.70 and standard deviation 0.447. Therefore, studies showed that the use of this teaching aids among students provides a better understanding, especially on the topic of Perfect Gas compared to teaching methods without the teaching aids that had been produced before. Through this method as well, the study found that students' interest and determination to deepen a lesson can be nurtured in more depth.

Development of basic physics experiment based on science process skills (SPS) to improve conceptual understanding of the preservice physics teachers on Boyle’s law

The study was motivated to develop Basic Physics Experiment (BPE) to improve preservice physics teachers understanding on Boyles law. The method used Research and Development (R&D) and involving preservice physics teachers as many as 18 students in the first year and 11 students in second year. This Study uses Student Worksheet (WS) based on Science Proses Skill (SPS). The conceptual understanding will be evaluated multiple choice tests for concepts Boyle Laws. The Result of the first year showed that student achievement in observation, inferring and hypothesis aspect of SPS not optimally. The result of conceptual understanding 46.67. In the second year, some activity and worksheet of SPS were develop based on the finding in the first year. Based on second year data showed improvement of SPS students and the result of conceptual understanding on Boyle Laws 78.86. Based on the results, it can be conclude that the development of basic physics experiment based on science process skills to improve conceptual understanding of the preservice physics teachers on Boyles law.

Development and Testing of a Mobile Phone App for Risk Estimation of Gas Volume Expansion and Intraocular Pressure Elevation in Patients With Intravitreous Gas or Air Tamponade: Interobserver Assessment Study

BackgroundPars plana vitrectomy (PPV) with intravitreous tamponade of gas or air has been widely used for a series of vitreoretinal diseases. It is estimated that 100,000 patients per year undergo PPV globally, and half of them were subsequently tamponaded with gas or air. According to Boyle’s law (P1V1=P2V2), patients with an intravitreous remnant of gas or air will be under high risk of intraocular pressure (IOP) elevation and subsequent vision loss owing to the expanded intravitreous gas or air when traveling post operation to a place with a significantly higher altitude. We always explain to patients why postoperative travel is potentially risky. Emergency cases of elevated IOP caused by postoperative traveling would sometimes come to surgeons. However, there have been few disease education or reference tools for both the surgeons and patients to have better communication.ObjectiveThe aim of this study was to introduce and evaluate a mobile phone app developed by surgeons (the authors) for preliminary risk estimation of volume expansion and IOP elevation in patients with intravitreous gas or air when traveling to a place of higher altitude.MethodsThe app was developed on the iOS and Android operating systems. Boyle’s law (P1V1=P2V2) was the theoretical basis of the app. Intravitreous gas or air volume and altitude values were independent factors to deduce the risk report. Consecutive patients underwent vitrectomy, and those with an intravitreous remnant of gas or air were recruited. The surgeons judged the vertical height of the fluid/gas interface through the dilated pupil; the patients were instructed to judge it according to their visual field when looking straight ahead and line it out on a chart included in the app. Finally, all the patients were required to fill a Likert scale–based questionnaire with 2 main items to evaluate the participants’ user experience and attitudes toward the app.ResultsA total of 50 patients were included (30 males and 20 females). All patients could independently operate the app to complete the test. The median heights of the fluid/gas interface independently judged by the surgeon and patients were 40% (range: 10%-75%) and 41% (range: 9%-78%), respectively (P=.63). The median altitude of the participants’ destinations was 150.0 m (range: 0-3490 m). The Bland-Altman analysis revealed a good agreement between the surgeons’ and patients’ judgments (bias of −0.3%), with 95% limits of agreement of −5.8% to 5.3%. Overall, the Likert scale revealed a positive attitude from the patients toward the app.ConclusionsThe app is reliable for patients to have preliminary risk estimation of intravitreous gas or air volume expansion and IOP elevation if travel to a place of higher altitude is planned. The surgeons could also use it as a platform for better disease communication.