Simple Form Research Articles

Oceanic Shallow-Water Investigations on a Variable-Coefficient Davey–Stewartson System

In this paper, a variable-coefficient Davey–Stewartson (vcDS) system is investigated for modeling the evolution of a two-dimensional wave-packet on water of finite depth in inhomogeneous media or nonuniform boundaries, which is where its novelty lies. The Painlevé integrability is tested by the method of Weiss, Tabor, and Carnevale (WTC) with the simplified form of Krustal. The rational solutions are derived by the Hirota bilinear method, where the formulae of the solutions are represented in terms of determinants. Furthermore the fundamental rogue wave solutions are obtained under certain parameter restrains in rational solutions. Finally the physical characteristics of the influences of the coefficient parameters on the solutions are discussed graphically. These rogue wave solutions have comprehensive implications for two-dimensional surface water waves in the ocean.

Results of sleeve gastrectomy conversion to Roux-en-Y gastric bypass on gastroesophageal reflux disease symptoms and proton pump inhibitors use evolution over time

BackgroundAlthough sleeve gastrectomy (SG) is associated with excellent results in the short term, it has been shown that it is plagued by weight regain and new onset or worsening of gastroesophageal reflux disease (GERD). These 2 clinical conditions are currently the 2 most frequent indications for revisional surgery. To date, only a few studies have focused exclusively on GERD. In a selected series of patients complaining of GERD symptoms after SG as a main complaint, we analyzed the efficacy of conversion to Roux-en-Y gastric bypass (RYGB), with a standardized surgical technique. MethodsThis is a retrospective study including all consecutive cases of SG to RYGB conversion for GERD not controlled by medical treatment. We excluded all patients undergoing conversion for weight regain without GERD. Quality of life and GERD symptoms were evaluated at outpatient’s clinic visits before and after surgery with 2 standardized questionnaires (Gastroesophageal Reflux Disease Questionnaire and Simplified Form 6). ResultsThis study showed that 70% of patients had complete resolution of GERD symptoms and 60% had completely discontinued proton pump inhibitors (PPIs). The conversion to RYGB resulted in a significant decrease in the rate of patients presenting daily symptoms of GERD and use of PPIs (10% and 16.6%, respectively; P < .019) and a dramatic increase in those without symptoms and no need for PPIs (70% and 60%, respectively; P < .001). ConclusionConversion to RYGB is a good option for GERD complications after SG providing a high rate of symptom remission and PPI discontinuation. Conversion to RYGB in the setting of GERD complications after SG improves postoperative outcomes decreasing GERD symptoms and improving quality of life.

Dark matter reconstruction from stellar orbits in the Galactic centre

Context. Current constraints on distributed matter in the innermost Galactic centre (such as a cluster of faint stars and stellar remnants, dark matter, or a combination thereof) based on the orbital dynamics of the visible stars closest to the central black hole typically assume simple functional forms for the distributions. Aims. We aim to take a general model-agnostic approach in which the form of the distribution is not constrained by prior assumptions on the physical composition of the matter. This approach yields unbiased, entirely observation-driven fits for the matter distribution and places constraints on our ability to discriminate between different density profiles (and consequently between physical compositions) of the distributed matter. Methods. We constructed a spherical shell model with the flexibility to fit a wide variety of physically reasonable density profiles by modelling the distribution as a series of concentric mass shells. We tested this approach in an analysis of mock observations of the star S2. Results. For a sufficiently large and precise data set, we find that it is possible to discriminate among several physically motivated density profiles. However, for data coming from current and expected next generation observational instruments, the potential for profile distinction will remain limited by the precision of the instruments. Future observations will still be able to constrain the overall enclosed distributed mass within the apocentre of the probing orbit in an unbiased manner. We interpret this in the theoretical context of constraining the secular versus non-secular orbital dynamics. Conclusions. Our results show that while stellar data over multiple orbits of currently known stars will eventually yield model-agnostic constraints for the overall amount of distributed matter within the probe’s apocentre in the innermost Galactic centre, an unbiased model distinction made by determining the radial density profile of the distribution is, in principle, out of the measurement accuracy of the current and next-generation instruments. Constraints on dark matter models will therefore remain subject to model assumptions and will not be able to significantly downsize the zoo of candidate models.

Students' Thinking Literacy Process in Mathematical Problem-Solving

This study explores and investigates the process of students’ mathematical thinking literacy in solving mathematical problems. This qualitative descriptive research used a test sheet consisting of one item adapted from the PISA mathematical problem model and interview guidelines, as the instrument. One male and two female participants were selected based on problem-solving characteristics. After that, task-based interviews were carried out to investigate the process of students’ mathematical thinking literacy. Data analysis was initiated by reviewing, reducing, and concluding all collected data to describe students’ mathematical thinking literacy in solving mathematical problems. The findings suggest that mathematical thinking literacy is initiated by understanding the problem (understanding), presenting the problem in a simpler form (specializing) to represent ideas, and creating patterns or relationships (generalizing). Based on the relationship between the problem, the subject predicts a solution (conjecturing) or determines the solution to the problem, re-checks (justifying) the problem-solving process to find a logical final result, and communicates the reasons (convincing) to convince the truth of the results obtained. The results of this study help teachers understand the process of students’ mathematical thinking literacy in solving mathematical problems so that it can be used to determine the appropriate strategy in the learning process to improve students' mathematical problem-solving abilities

SYNTHESIS OF NATIONAL AND WESTERN TRADITION IN EARLY EXAMPLES OF JAPANESE MODERNISM (THE CASE OF WORLD PEACE MEMORIAL CATHEDRAL IN HIROSHIMA)

The paper is devoted to the analysis of the existing influences of traditional Japanese architecture in the modernist World Peace Memorial Cathedral in Hiroshima built after the atomic bombing in Hiroshima on the site of the Noboricho Catholic Church destroyed by the explosion, designed by the architect Togo Murano (using some of the competition ideas of the Kenzo Tange project). According to the results of the study, it was found that the architecture of the World Peace Memorial Cathedral in Hiroshima in Hiroshima represents a synthesis of the traditions of European Romanesque, the Japanese tradition of temple building, and the actual style of modernism, transformed through the prism of the creative manner of the talented architect of Japan of his time, Togo Murano, who had a huge experience in creating architecture with reminiscences of various , both Japanese and European styles of the past and present. In particular, it was established that the general planning and composition of the cathedral is close to the style of basilica churches of European Romanesque, taking into account the simplified global forms of modernism. At the same time, the appearance on the facade of the cathedral of its frame structure and a number of decoration elements refers to the tradition of ancient Japanese architecture, which is especially noticeable in the decoration of the main facade in the form of Japanese carved partitions, which, however, in accordance with the ideas of modernism, are made of concrete. From the results of the work, it is generally clear that Japanese modernism, from the very beginning of its spread in Japan, fundamentally differed from Europe, as it did not accept the idea manifested by European modernism of a complete rejection of traditional form-making. On the contrary, modernism in Japan actively used the national tradition as a basis for ideas.

Accounting For Islamic Housewives On Savings For Basic Necessities For Eid Al-Fitr

This article aims to discuss accounting for Islamic housewives regarding saving for basic needs ahead of Eid al-Fitr, which is a special day for Muslims all over the world, where before the holiday usually the price of basic necessities will increase significantly, therefore Islamic housewives must prepare special recording in the form of savings or wadi’ah by managing family income funds. A descriptive qualitative research method that brings the phenomenon closer to housewives' finances in preparation for Eid. The results of this research are that it is not just the costs shown in household records or transparency, but the practice of a housewife's responsibility which must be competent, accountable in managing family funds in a simple form showing an attitude of discipline that brings about family harmony and an Islamic outlook on life. a belief can be held accountable before God in the future.

System-bath correlations and finite-time operation enhance the efficiency of a dissipative quantum battery

The reduced state of a small system strongly coupled to a thermal bath may be athermal and used as a small battery once disconnected. The unitarily extractable energy (a.k.a. ergotropy) will be negligible if the disconnecting process is too slow. To study the efficiency of this battery, we consider the cycle of disconnecting, extracting, and connecting the battery back to the bath. Efficiency, i.e. the ratio between ergotropy and connecting plus disconnecting work, is a function of disconnecting time. We consider the Caldeira–Leggett model of a quantum battery in two scenarios. In the first scenario, we assume that the discharged battery is uncorrelated to the bath when connecting back and find that the efficiency peaks at an optimal disconnecting time. In the second scenario, the discharged battery is correlated to the bath, and see that the optimal efficiency corresponds to an instantaneous disconnection. On top of these results, we analyze various thermodynamic quantities for these Caldeira–Leggett quantum batteries and express the first and second laws of thermodynamics for the cycles in simple form despite the system-bath initial correlations and strong coupling regime of the working device.

RESEARCH ON THE USE OF NON-INFLECTIVE FORMS OF THE VERB BY THE STUDENTS OF GJAKOVA

We know that the Albanian language has simple forms of the verb, such as: participle, transitive, past participle, negative, which are then divided into two groups. What piqued our interest about the non-elaborated forms, are the syntactic functional forms of the use of the infinitive in particular (among others), in the essays of students at the Faculty of Education in Gjakova.If we look and analyze the first documents written in Albanian, it is noticeable that the infinitive was very commonly used, even when looking at its phonetic and morphological aspect. Therefore, this formal structure of the infinitive is quite disputable considering its antiquity in our language. In addition to the infinitive, we also have the participle, to which the auxiliary verbs “be” and “have” have been added, we also see that in the essays of our students the syncope is used in most of their writings, without overlooking the apocope. We also have the conjunctive, which shows an action that accompanies or follows the action shown by using another verb, which is also quite utilized in our students' essays. As well as the negative infinitive form, which is formed by placing the word with a negative meaning –pa, before the participle of the verb, which can also be expressed with the negative participle -nuk or -s'. We will present all of this in our research, where we will then show the changes that the formal structure has undergone, be it phonetic, morphological or syntactic, which leaves a lot of room to discuss their linguistic antiquity.

Pelatihan Singkat Servis Motor Bagi Siswa SMA Islam As Saadah Setu Tangerang Selatan

Motorized vehicles, especially motorbikes, have now become daily necessities, no longer classified as luxury goods. Due to the high level of need, almost every family has one motorbike, maybe even more than one. Motor vehicles are simple forms of transportation, can be driven in residential areas, both urban and rural, and the operational costs are relatively affordable for most groups. Current developments in motorbike design allow riders from young to old. Data shows that demand and use of motorbikes continues to increase. According to the Central Statistics Agency (BPS), in 2022 the number of vehicles in Indonesia will reach 148,212,865. The number of private vehicles in Indonesia is still dominated by motorbikes with a figure of 125,267,349 units (almost 85% of which are dominated by motorbikes). With the rapid increase in the number of motorized vehicles, many workshops and repairs have emerged, both large and small, official and unofficial workshops. The problems that arise are due to busyness, laziness or lack of knowledge and skills, so motorbike servicing is carried out at a repair shop. Especially for young people and students, who only like riding motorbikes, don't care about the condition of the motorbike, and don't learn how to service it even to repair minor damage. This will benefit the workshop. In fact, you should be able to save money if you can repair it yourself. It can even be detrimental if it is serviced by an irresponsible illegal workshop. From the results of surveys and observations at the Assa'adah Islamic Boarding School, South Tangerang, almost all students are unable to service their motorbikes themselves. Therefore, the team of Mechanical Engineering Lecturers at Pamulang University offers motorbike service training for students with the aim of giving them knowledge and skills in servicing motorbikes. Armed with this knowledge and skills, it is hoped that motorbike maintenance and if damage occurs, you can do it yourself, you don't need to take it to a repair shop. At least with this knowledge and skills, you can save financial expenses, and even the knowledge and skills obtained can become provisions for opening a motorbike service business in the future. The training offered is packaged in the form of Community Service (PKM) as one of the elements of the Tridharma of Higher Education. A short training method will be given in theory about motorbike service and maintenance, and practical motorbike service and maintenance will be carried out.

Micro-jetting: Areal density calculation from a triangular groove

We present a method for calculating the mass ejected during the reflection of a shock wave on a triangular groove. This calculation is based on the combination of two models taken from the literature, BMPT-2, on the one hand, for the calculation of the velocity and density of the jet, and fragmentation zone propagation (FZP ) on the other hand, for the calculation of the ejected mass, certain parameters required for FZP being determined by BMPT-2. Compared with previous work, FZP has been extended to deal with the various stages of jet formation. The approach was first evaluated on tin using a large-scale molecular dynamics simulation. This first step validated the overall phenomenology and the associated theoretical tools, and enabled us to propose a procedure for adjusting FZP. Next, we used the BMPT-2/FZP combination to analyze ejected mass measurement experiments using Asay foil. The areal mass curves are well reproduced with few parameters, showing that there is no inconsistency between BMPT-2/FZP and the experiments. Finally, a more detailed analysis of the results obtained enables us to set the limits of the jet thickness at the moment of rupture, and to propose a simple analytical form of its profile compatible with the model used.

Process evaluation of the implementation of the ABC method, an intervention for nurses dealing with challenging behaviour of patients with brain injury

BackgroundIntroducing new working methods is common in healthcare organisations. However, implementation of a new method is often suboptimal. This reduces the effectiveness of the innovation and has several other negative effects, for example on staff turnover. The aim of the current study was to implement the ABC method in residential departments for brain injured patients and to assess the quality of the implementation process. The ABC method is a simplified form of behavioural modification based on the concept that behaviour operates on the environment and is maintained by its consequences.MethodsFour residential departments for brain injured patients introduced the ABC method sequentially as healthcare innovation using a stepped-wedge design. A systematic process evaluation of the implementation was carried out using the framework of Saunders et al. Descriptive statistics were used to analyse the quantitative data; open questions were clustered.ResultsThe training of the ABC method was well executed and the nursing staff was enthusiastic and sufficiently involved. Important aspects for successful implementation had been addressed (like a detailed implementation plan and implementation meetings). However, facilitators and barriers that were noted were not addressed in a timely manner. This negatively influenced the extent to which the ABC method could be properly learned, implemented, and applied in the short and long term.ConclusionsThe most challenging part of the introduction of this new trained and introduced method in health care was clearly the implementation. To have a successful implementation serious attention is needed to tailor-made evidence-based implementation strategies based on facilitators and barriers that are identified during the implementation process. Bottlenecks in working with the ABC method have to be addressed as soon as possible. This likely requires ‘champions’ who are trained for the job, next to an organisation’s management that facilitates the multidisciplinary teams and provides clarity about policy and agreements regarding the training and implementation of the new method. The current process evaluation and the recommendations may serve as an example for the implementation of new methods in other healthcare organisations.

Societal perceptions of aquaculture: Combining scoping review and media analysis

AbstractAquaculture has been recognised for achieving multiple United Nations Sustainable Development Goals; its further growth depends on understanding, and responding to, societal perceptions in a broader context. Thus, this study aims to understand societal perceptions of aquaculture through a scoping review and media analysis. A scoping review identified 151 academic studies for inclusion in our five identified research clusters: (1) social acceptability, (2) growth and development, (3) media coverage, (4) sustainable aquaculture, and (5) consumer perceptions. Further, newspaper articles (n = 100) were sampled from the United Kingdom, Denmark, France, Spain, Turkey, and China; elsewhere all articles identified were included (Poland, 79; Hungary, 29; India, 70). The findings suggest that scientific and newspaper articles tend to present sustainability aspects in a simplified form. Key stakeholder groups include fish farming enterprises, civil society, governmental officials, scientists, and business leaders both within aquaculture value chains (retailers/wholesalers, technology industry) and outside of them (fisheries, tourism). Also, other stakeholders included the public (indigenous groups, residents, consumers). The stakeholder groups perceived aquaculture differently and depending on the circumstances and context, their perceptions ranged from positive to negative. Many factors influenced their perceptions, including aquaculture's impact on multiple sustainability dimensions, knowledge, transparency, personal interests, types, and location of aquaculture practises, regulations, experience, and sociodemographic characteristics such as age, gender, education, and income. We recommend that aquaculture practitioners focus on context‐specific multifaceted strategies—prioritising transparency, communication, and accountability—and provide essential knowledge to ensure that societal perceptions of aquaculture are based on accurate, empirical information.

The grey decision model and its application based on generalized greyness of interval grey number

PurposeIn order to solve the decision-making problem that the attributive weight and attributive value are both interval grey numbers, this paper tries to construct a multi-attribute grey decision-making model based on generalized greyness of interval grey number.Design/methodology/approachFirstly, according to the nature of the generalized gresness of interval grey number, the generalized weighted greyness distance between interval grey numbers is given, and the transformation relationship between greyness distance and real number distance is analyzed. Then according to the objective function that the square sum of generalized weighted greyness distances from the decision scheme to the best scheme and the worst scheme is the minimum, a multi-attribute grey decision-making model is constructed, and the simplified form of the model is given. Finally, the grey decision-making model proposed in this paper is applied to the evaluation of technological innovation capability of 6 provinces in China to verify the effectiveness of the model.FindingsThe results show that the grey decision-making model proposed in this paper has a strict mathematical foundation, clear physical meaning, simple calculation and easy programming. The application example shows that the grey decision model in this paper is feasible and effective. The research results not only enrich the grey system theory, but also provide a new way for the decision-making problem that the attributive weights and attributive values are interval grey numbers.Practical implicationsThe decision-making model proposed in this paper does not need to seek the optimal solution of the attributive weight and the attributive value, and can save the decision-making labor and capital investment. The model in this paper is also suitable for the decision-making problem that deals with the coexistence of interval grey numbers and real numbers.Originality/valueThe paper succeeds in realizing the multi-attribute grey decision-making model based on generalized gresness and its simplified forms, which provide a new method for grey decision analysis.

The improvement of hydrogen storage capacity via bubbles nucleated in ice-like nanotubes

The existing methods of hydrogen storage bottlenecked advancements in its commercialization on an industrial scale. Here, the hydrogen storage capacity via the hydrogen clathrate hydrate in ice Ih (HCHinIh) with the aid of nanobubbles is further improved to 3.442–3.494 wt% from the previous 3.441 wt%. These nanobubbles are designedly arranged within 0.5 mm diameter individual ice spheres which initially pack in simple cubic form, and then used to synthesize the hydrogen clathrate hydrate as does HCHinIh. The total volume of nanobubbles is adjustable by deploying their different space layouts. In addition, we propose that the bubble formation is driven by transforming the pre-melted quasi-liquid layer (PMQLL) to solid ice-like in an ice-like nanotube, which is a structure comprised of PMQLL and ice surrounding PMQLL (PMQLL-ice) analogous to a carbon nanotube-graphene sheet (CNT-GS) structure, where the interaction energy related to O–O and O–H in PMQLL-ice is 0.08–6.17 times that of C–O and C–H in the CNT-GS structure.

A general hyperelastic model for rubber-like materials incorporating strain-rate and temperature

A comprehensive hyperelastic model that precisely forecasts the mechanical characteristics of materials with rubber-like qualities is presented. This model relies on the well-established five-parameter Mooney-Rivlin model, which is then extended to incorporate strain rate dependent and temperature dependent term. To validate its accuracy, experimental data from ethylene propylene diene monomer (EPDM) rubber materials was utilized to compare with the model prediction. Hyperelastic stress-strain curves were collected from a variety of materials that were subjected to varying temperatures and strain rates to improve the model’s applicability. Its prediction results are compared against the collected experimental data, resulting in consistent and reliable outcomes. The simplified form of the model not only establishes an effective framework for characterizing and predicting the mechanical response of materials that resemble rubber under different working conditions but makes the coding and implementation of finite element analysis easier.

Quantum beam splitter based on free charged particles.

It is well known that the beam splitter is an integral part of many classical and quantum devices. The use of beam splitters in quantum technologies is currently particularly relevant. The emergence of new types of beam splitters provides new statistical characteristics of the separated photon beam and their control and new possibilities for use in various devices. This Letter presents a new, to the best of our knowledge, type of beam splitter based on free charged particles. This type of beam splitter has all the properties of a linear beam splitter with its reflection coefficient R, transmission coefficient T, and phase shift ϕ, which are presented in a simple analytical form. This type of beam splitter has interesting application prospects.

Analytical modeling of thermoacoustic instability influences in gas turbine combustors: A detailed parameter sensitivity analysis

In this study, the effects of various system parameters on combustion instability were numerically identified through a network-based thermoacoustic model using the concept of a transfer function. The acoustic transfer function was derived from the wave equation and various conservation laws in a two-duct system consisting of a nozzle and combustion chamber that is a simplified form of a gas turbine combustor. From the current numerical approach, the major parameters affecting the system acoustics, such as the duct length, area ratio, sound speed ratio, and Mach number, as well as the inlet and outlet acoustic boundary conditions, were defined explicitly, and a method for intuitively examining their influence was presented. The gain (nf) of the flame transfer function was noted to have a complex effect in combination with factors such as temperature ratio and area ratio, and the time delay (τf) was one main dominant factor that determined the main characteristics of instability, resulting in mode transition as well as changes in frequency and growth rate of the instability.

Disturbance observer–based finite‐time fault tolerant control of quadrotor unmanned aerial vehicles with command filtered and event‐triggered techniques

AbstractThis article primarily focuses on the finite‐time fault‐tolerant tracking control problem of quadrotor unmanned aerial vehicle (UAV) systems. Our main innovation points are: (1) A simple cubic form of Lyapunov function is applied to the design of the position ring controller of the quadrotor UAV; (2) The command filtering technology effectively solves the challenge of derivation of complex coupling matrixs in the controller design process; (3) An improved disturbance observer and a variable threshold event‐triggered mechanism are applied in the Quadrotor UAV system. In summary, the overall approach combines the backstepping method and finite‐time Lyapunov stability to prove the finite‐time stability of all the signals in the system. Finally, the effectiveness and rationality of the algorithm are verified through simulation experiments and its application on an actual simulation platform.

On some series involving the binomial coefficients C(3n,n)

Using a simple transformation, we obtain much simpler forms for some series involving binomial coefficients $\binom{3n}n$ derived by Necdet Batır. New evaluations are given and connections with Fibonacci numbers and the golden ratio are established. Finally we derive some Fibonacci and Lucas series involving the reciprocals of $\binom{3n}n$.

PERCEIVED EXERCISE BELIEFS AND BARRIERS AMONG BREAST CANCER SURVIVORS: A DESCRIPTIVE CROSS-SECTIONAL STUDY

Since the importance of the benefit of physical activity and exercise has been understood especially for cancer patients, efforts are taken to assess belief in exercise to adapt patients to a more physically active environment to create a sustainable health outcome. Thus, this study aimed to assess exercise beliefs and barriers by using a validated metric tool (Exercise Beliefs/Barriers Scale-EBBS) to evaluate beliefs in exercise in breast cancer survivors (BCS). In addition, it was also aimed to assess the relationships among EBBS, sociodemographic, and clinical variables of BCS. A total of 112 BCS were screened and invited to participate in this study. Clinical (type of surgery, adjuvant treatments, etc.), demographic data (age, medication use, etc.), and total sitting time were collected through a simple data form and 7th of the International Physical Activity Questionnaire-Short Form (IPAQ-SF), respectively. All patients were requested to fill out EBBS.96 BCS completed this study. Weak but significant correlations were found between time spent after surgery and perceived belief (r=. -273, p=0.009), and perceived barriers (r=-.239, p=0.022), respectively. Perceived barriers were also significantly correlated with age (r=-.212, p=0.042). No significant effects of the type of breast surgery and axillary procedure as well as medications (Tamoxifen) on perceived beliefs and barriers were found. Factors should be thoroughly investigated to provide a sustainable exercise behavior among BCS. Older BCS should be thoroughly monitored to gain regular exercise behavior. This study also highlighted the emerging need for sensitive, specific, and focused tools to assess beliefs in exercise among the cancer population.