bluuebunny/crossref_metadata_2025 huggingface dataset:
Accountability and perception of prosocial behavior in village fund management
Authors: Diansari Rani Eka , Othman Jaizah Binti , Musah Adiza Alhassan
Published: February 2023

This study examines organizational commitment and competency in Indonesia as a moderator of prosocial behavior toward village fund management accountability. Transparency and accountability are essential in the village government’s role as the custodian of public funds (Taufiqi & Ariani, 2022). Central and local governments implemented public accountability to improve governance (Suwanda & Suryana, 2021). Prosocial conduct and accountability in the management of village funds are the focus of this study. The data were collected through the distribution of questionnaires to each and every village throughout Indonesia. The sample was obtained using a simple random sampling technique from all village officials throughout Indonesia, with a total of 689 people responding to the survey. The data for this analysis were analyzed using the SmartPLS. Prosocial behavior affects village fund management accountability, a study found. Organizational commitment has a moderating effect on the relationship between prosocial behaviour and accountability of village fund management, while village official’s competence does not. This study shows that the variable competence of the village official is feasible to be used as a moderating variable in the relationship between prosocial behavior and accountability, so the researchers recommend this variable be used to moderate it with other variables that may affect accountability.
ON GENERALIZED MITTAG-LEFFLER-TYPE FUNCTIONS OF TWO VARIABLES
Authors: KARIMOV ERKINJON , Hasanov Anvar
Published: February 2023

We aim to study Mittag-Leffler type functions of two variables D 1 ( x ,
y ) , . . . , D 5 ( x , y ) by analogy with the Appell hypergeometric
functions of two variables,. Moreover, we targeted functions E 1 ( x , y
) , . . . , E 10 ( x , y ) as limiting cases of the functions D 1 ( x ,
y ) , . . . , D 5 ( x , y ) and studied certain properties, as well.
Following Horn’s method, we determine all possible cases of the
convergence region of the function D 1 ( x , y ) . Further, for a
generalized hypergeometric function D 1 ( x , y ) (Mittag-Leffler type
function) integral representations of the Euler type are proved.
One-dimensional and two-dimensional Laplace transforms of the function
are also defined. We have constructed a system of partial differential
equations which is linked with the function D 1 ( x , y ) .
Adjoint Method in PDE-based Image Compression
Authors: JACUMIN Thomas , Belhachmi Zakaria
Published: February 2023

We consider a shape optimization based method for finding the best
interpolation data in the compression of images with noise. The aim is
to reconstruct missing regions by means of minimizing a data fitting
term in an L p -norm between original images and their reconstructed
counterparts using linear diffusion PDE-based inpainting. Reformulating
the problem as a constrained optimization over sets (shapes), we derive
the topological asymptotic expansion of the considered shape functionals
with respect to the insertion of small ball (a single pixel) using the
adjoint method. Based on the achieved distributed topological shape
derivatives, we propose a numerical approach to determine the optimal
set and present numerical experiments showing, the efficiency of our
method. Numerical computations are presented that confirm the usefulness
of our theoretical findings for PDE-based image compression.
Preface to the book Fast Processes in Large Scale Atmospheric Models: Progress, Challenges and Opportunities
Authors: Liu Yangang
Published: February 2023

Preface Many physical processes that influence Earth’s climate and
weather occur on spatial (temporal) scales smaller (shorter) than
typical grid sizes (time steps) of general circulation models, and thus
must be parameterized. Computer models are essential tools for
understanding atmospheric phenomena and for making accurate predictions
of any changes in the Earth’s climate, weather, and resources of
renewable energy resulting from anthropogenic activities that generate
greenhouse gases and particulates into the atmosphere. This book focuses
on the atmospheric subgrid processes ─ collectively called fast physics
─by reviewing and synthesizing relevant physical understanding,
parameterization developments, various measurement technologies, and
model evaluation framework. The publication is divided into three parts,
containing seventeen chapters (Chapters 2-17) to reflect and synthesize
the multiple aspects involved. The first chapter briefly introduces the
historical development of fast physics parameterizations and the
involved complexities; the last chapter summarizes emerging challenges,
new opportunities and future research directions. Part I deals with
major subgrid processes, with eight chapters (Chapters 2-9) each
covering different processes more or less in the conventional
compartmentalized format with an emphasis on individual processes,
including but, not limited to radiative transfer, aerosols, and aerosol
direct & indirect effects, entrainment-mixing processes, their
microphysical influences, convection & convective clouds, stratiform
clouds such as stratus and stratocumulus clouds, planetary boundary
layer processes, land surface and interactions with atmosphere, and
gravity waves. On top of the conventional treatments, some promising
ideas/approaches have recently emerged to unify the treatment of
individual processes and thus allows for consideration of process
interactions. Part II is devoted to such unifying efforts, with four
chapters (Chapters 10-13) covering four different endeavors: the
unifying parameterizations based on assumed probability density
functions; the EDMF approach that combines the Eddy Diffusivity and Mass
Flux approaches to unify turbulence and convection; application of
machine learning techniques; and innovative top-down attempts that
consider the involved totality by borrowing ideas from systems theory,
statistical physics, and non-linear sciences. Part III (Chapters 14-17)
is devoted to assessments, model evaluation, and model-measurement
integration, with four chapters that focus on satellite and airborne
remote sensing measurements, surface-based remote sensing measurements,
in-situ and laboratory measurements, and model evaluation, and
model-measurement integration, respectively.
Dark, dissatisfied and disengaged: Propensity towards marital infidelity, the dark triad, marital satisfaction and the mediating role of moral disengagement
Authors: Lişman Carmen , Holman Andrei
Published: February 2023

Past research found various immoral conducts that people with higher levels of the Dark Triad traits are more inclined to engage in, including infidelity. Marital dissatisfaction has also emerged as a factor of unfaithful behaviors. However, the psychological dynamics of the effects of these personality and relational factors on infidelity are less clear. This study examined the potential mediational role of the use of moral disengagement strategies for justifying infidelity in the relationships between the Dark Triad traits and marital satisfaction, on the one hand, and the tendency towards unfaithful behaviors, on the other, in married participants (N = 241). Results indicate that psychopathy, narcissism and marital dissatisfaction are related to stronger tendencies towards infidelity, and that these effects are partially (in the case of psychopathy and marital dissatisfaction) or totally (in the case of narcissism) mediated by the tendency to morally justify unfaithful acts. No unique direct or indirect effect of Machiavellianism emerged as significant, while men were found to be more inclined towards unfaithful conduct. These findings highlight the importance of the skewed and self-lenient moral judgments fostered by the Dark Triad traits and marital dissatisfaction, which legitimize one?s infidelity and thus renders it more likely.
Job autonomy and employee strengths use: The roles of work engagement and job insecurity
Authors: Wang Fuxiang , Su Weilin , Ding He
Published: February 2023

Employee strengths use has been found to be beneficial to employee and the employer organization. Yet, we have little knowledge on the antecedents to employee strengths use. Especially, there is a dearth of research investigating work characteristics and employee strengths use relationship. Drawing on conservation of resources theory, this study sought to investigate the relationship of job autonomy as a type of work characteristic with employee strengths use and the mediational effect of work engagement as well as the moderating effect of job insecurity on the relationship. A three-wave research design, spaced by a four-week interval, was utilized to collect data. A convenience sample of 218 employees working in diverse Chinese companies was applied to test our hypotheses. Results showed that job autonomy is positively related to employee strengths use, work engagement acts as a mediator in the link between job autonomy and employee strengths use. In addition, job insecurity was found to lessen the direct relationship of job autonomy with work engagement and the indirect relationship of job autonomy with employee strengths use via work engagement. This study advances the theory and research on employee strengths use.
Numerical analysis of injection parameters influence on diesel engine performances and emissions correlated by maximum in-cylinder pressure
Authors: Bencherif Mohamed , Leftas Tewfik , Larbes Nasreddine
Published: February 2023

The present work deals with a numerical investigation on an experimental single cylinder direct injection Diesel engine. Calculations are carried out with Kiva3v2 code using multidimensional detailed chemistry. The study was carried out on predicted CO, and NOx emission levels by the engine cylinder before exhaust valve opening. Correlations proposed for predicted NO, CO, and NOx levels function of fuel, O2, N2 concentrations and the maximum in-cylinder pressure rather than temperature. Predicted values of averaged pressures, O2, CO, and CO2 levels in the exhaust manifold were validated by the measured ones for a set of five loads at 1500 rpm. CO, NO, and NOx concentrations at the exhaust obtained by calculations lies perfectly with measured values. Otherwise, numerical simulations lead us to analyze injection timing, duration and fuel amount injected effect on the engine performances, ignition delay, combustion duration as well as CO and NOx emission levels.
Optimized method for thermal through silicon via placement with non-uniform heat sources in 3-D-IC
Authors: Dai Feng , Pan Zhong-Liang
Published: February 2023

In the past few years, thermal through silicon via (TTSV) has been experimentally investigated as an effective heat dissipation path. Although a lot of heat dissipation-related issues have been solved in 3-D integrated circuit (3-D-IC), there are neglections in TTSV placement with non-uniform heat sources so far. In this study, a unique optimization is proposed to locate TTSV while effectively alleviating hot spots in 3-D-IC. The thermal dissipation of non-uniform heat sources are studied using the finite element method. The simulation results show that the minimum temperature is reduced by 2.1% compared with peak temperature in the single-layer chip, and by 1.9% in the three-layer chip.
Simulation and modeling of a solar-aided underground energy storage system
Authors: Saglam Ozdamar Hazel , Ozdamar Seyit , Mert Suha
Published: February 2023

The significance of energy storage methods and related R and D studies are increasing due to the depletion of fossil fuels, rising energy prices, and growing environmental concerns. Storage of energy means elimination of practical concerns for the time difference between the time when the energy is produced and when it?s needed. The importance of producing and storing energy through renewable sources is increasing every day, especially in developing countries like Turkiye, as such countries would like to reduce their dependence on foreign sources. This study focuses on an underground thermal energy storage system that was modeled for Van Region, using M-file program. The performance of an isolated day heat system as a thermal energy storage was investigated, and the thermal energy storage capacity of the system was researched for a 5 m ? 5 m ? 5 m soil area located on the Van Yuzuncu Yil University Campus. The temperature distribution, heat loss, and efficiency calculations were performed for a complete year and 3-D representations of the findings were obtained. The lowest efficiencies were observed in May, while the highest efficiencies were observed in July. It was found that the maximum heat loss from the system took place during December and January, and the system could be easily and effectively become a heating source for a single household with the addition of a heat pump.
Numerical simulation for heat transfer of silica-aerogel filled 3-D stitched spacer fabric composites
Authors: Liu Tianjiao , Li Ning , Tian Mengqi , Dong Jie , Mu Yao , Sun Runjun , Li Yujuan
Published: February 2023

Spacer fabrics and their composites have great advantages of being excellent heat insulation materials because of their cavity structure characteristics. However, there are few researches on the thermal insulation of spacer fabric composites with different spacer shapes and geometric parameters. In this work, stitched spacer fabric composites filled with silica aerogel with rectangular, triangular and trapezoidal spacer shapes and their models were designed. The results of experiments and simulations show that the temperature distribution of spacer fabric composites has good consistency at high temperature. By analyzing the heat transfer results of composites with different geometric parameters, it was found that the length of the connecting layer between the top and bottom layers and the distance between two adjacent sutures in the top layer affect the minimum and maximum temperatures of the top surface.
Heat transfer increment study taking into consideration fin lengths for CuO-water nanofluid in cross flow-impinging jet flow channels
Authors: Karabulut Koray
Published: February 2023

In this study, the heat transfer and flow characteristics for cube and circular hollow models in channels with the cross-flow-impinging jet-flow were numerically investigated by using water and 2% CuO-water nanofluid. The numerical work was carried out steady and 3-D using the ANSYS-FLUENT program with the k-? turbulence model. A fin with 45? and 90? angles and D, 1.166 D, and 1.333 D (K) lengths was added to the upper channel surface from the impinging jet inlet at D (N) distance. A constant heat flux of 1000 W/m2 was applied to the model surfaces. The channel height is fixed in 3D (H) and the Reynolds number range of the fluids is 5000-15000. The numerical results obtained from the study were compared with the results of the experimental study in the literature and it was seen that the results were compatible and acceptable. The results of the study were examined as the mean Nusselt number, surface temperature, and performance evaluation coefficient variations for each model in the channels. Also, velocity and temperature contour distributions of the combined jet CuO-water nanofluid flow were visual-ized. The average Nusselt number increases for CuO-water nanofluid at Re = 15000, K = D, and 90? fin angle are 32.55% and 26.11% compared to with-out fin and water fluid for cube and circular hollow models, respectively.
The Type 1 Diabetes and EXercise Initiative (T1DEXI): Examining the acute glycemic effects of different types of structured exercise sessions in type 1 diabetes in a real-world setting
Authors: Riddell Michael C. , Li Zoey , Gal Robin L. , Calhoun Peter , Jacobs Peter G. , Clements Mark A. , Martin Corby K. , III Francis J. Doyle, , Patton Susana R. , Castle Jessica R. , Gillingham Melanie B. , Beck Roy W. , Rickels Michael R.
Published: February 2023

  

Objective: Maintenance of glycemic control during and following exercise remains a major challenge for individuals with type 1 diabetes. Glycemic responses to exercise may differ by exercise type (aerobic, interval, resistance), and the effect of activity type on glycemic control following exercise remains unclear.

Research Design-Methods: The Type 1 Diabetes Exercise Initiative (T1Dexi) was a real-world study of at-home exercise. Adult participants were randomly assigned to complete six structured aerobic, interval, or resistance exercise sessions over 4-weeks. Participants self-reported study and non-study exercise, food intake, and insulin dosing (multiple-daily injection [MDI] users) using a custom smart phone application, and provided pump data (pump users), heart rate, and continuous glucose monitoring (CGM) data.

Results: 497 adults with type 1 diabetes, mean±SD age 37±14 years, HbA1c 6.6±0.8% (49±8.7 mmol/mol) assigned to structured aerobic (N=162), interval (N=165), or resistance (N=170) exercise were analyzed. Mean change in glucose during assigned exercise was -18±39, -14±32, and -9±36 mg/dL for aerobic, interval, and resistance, respectively (P<0.001), with similar results for closed loop, standard pump, and MDI users. Time-in-range 70-180 mg/dL [3.9-10.0 mmol/L] was higher during the 24-hours following study exercise when compared to days without exercise (76±20% vs. 70±23%; P<0.001).

Conclusion: Adults with type 1 diabetes experienced the largest drop in glucose level with aerobic followed by interval and resistance exercise, regardless of insulin delivery modality. Even in well controlled adults with type 1 diabetes, days with structured exercise sessions contributed to clinically meaningful improvement in glucose time-in-range but may have slightly increased time below range.
Plasma proteomic risk markers of incident type 2 diabetes reflect physiologically distinct components of glucose-insulin homeostasis
Authors: Cronjé Héléne T. , Mi Michael Y. , Austin Thomas R. , Biggs Mary L. , Siscovick David S. , Lemaitre Rozenn N. , Psaty Bruce M. , Tracy Russell P. , Djoussé Luc , Kizer Jorge R. , Ix Joachim H. , Rao Prashant , Robbins Jeremy M. , Barber Jacob L. , Sarzynski Mark A. , Clish Clary B. , Bouchard Claude , Mukamal Kenneth J. , Gerszten Robert E. , Jensen Majken K.
Published: February 2023

High-throughput proteomics allow researchers to simultaneously explore the roles of thousands of biomarkers in the pathophysiology of diabetes. We conducted proteomic association studies of incident type 2 diabetes and physiologic responses to an intravenous glucose tolerance test (IVGTT) to identify novel protein contributors to glucose homeostasis and diabetes risk. We tested 4,776 SomaScan® proteins measured in relation to 18-year incident diabetes risk in participants from the Cardiovascular Health Study (CHS, N=2,631), and IVGTT-derived measures in participants from the HERITAGE Family Study (N=752). We characterize 51 proteins that were associated with longitudinal diabetes risk, using their respective 39, 9, and 8 concurrent associations with insulin sensitivity (SI), acute insulin response to glucose (AIRG), and glucose effectiveness (SG). Twelve of the 51 diabetes associations were novel, including beta-glucuronidase, which associated with increased diabetes risk and lower SG, suggesting an alternative pathway to insulin for glucose disposal; and plexin-B2 which also associated with increased diabetes risk, but with lower AIRG, and not with SI, indicating a mechanism related instead to pancreatic dysfunction. Other novel protein associations included alcohol dehydrogenase-1C, fructose-bisphosphate aldolase-B, and sorbitol dehydrogenase with elevated type 2 diabetes risk, and leucine rich repeat containing protein-15 and myocilin with decreased risk.
Peningkatan Kompetensi Guru dalam Project Based Learning melalui Temu Pendidik Daerah
Authors: Aditama Madya Giri , Shofyana Maila Huda , Muslim Rachmat Imam , Pamungkas Imam , Susiati Susiati
Published: February 2023

Penerapan Kurikulum Merdeka menuntut peningkatan kemampuan guru untuk menyesuaikannya. Salah satu poin utama dalam aplikasi kurikulum tersebut adalah penerapan metode Project Based Learning yang dianggap memiliki potensi besar dalam memaksimalkan kompetensi siswa. Tujuan dari kegiatan Pengabdian kepada Masyarakat ini adalah untuk meingkatakan kompetensi guru di daerah Kota Pekalongan dalam memahami Project Based Learning dan penerapannya. Kegitan yang di selenggarakan di SMA Sains Cahaya Al Quran Pekalongan ini diikuti oleh 32 peserta, terdiri dari guru-guru yang berasal dari beberapa sekolah di kota pekalongan. Metode pelatihan diterapkan dalam kegiatan pengabdian ini yang dikemas dalam konsep Temu Pendidik Daerah. Fakta dilapangan yang telah terjadi bahwa mayoritas pendidik hanya memahami PjBL sebatas pemberian tugas keapada siswa, padahal PjBL lebih dari itu. Metode ini dapat memaksimalkan kompetensi siswa, menerapkan 6 profil pelajar pancaseila dengan maksimal, serta dapat membantu guru dalam penilaian apabila dikombinasikan dengan asesmen yang tepat. Kegiatan pengabdian ini dilakukan selain meluruskan miskonsepsi tersebut juga untuk meningkatkan kompetensi pedagogik guru dalam menyusun pembelajaran dalam era Merdeka Belajar.
A spatiotemporal spread of COVID-19 pandemic with vaccination optimal control strategy: A case study in Morocco
Authors:   Laboratory of Analysis, Modeling, and Simulation (LAMS), Department of Mathematics and Computer Science, Faculty of Sciences Ben M'Sick, Hassan II University of Casablanca, Morocco, Kouidere A. , Elhia M. ,   MAEGE Laboratory, FSJES Ain Sebaa, Hassan II University of Casablanca, Morocco, Balatif O. ,   Faculty of Sciences, Chouaib Doukkali University
Published: February 2023

On March 2, 2020, the Moroccan Ministry of Health announced the first case of COVID-19 in the city of Casablanca for a Moroccan tourist who came from Italy. The SARS-COV-2 virus has spread throughout the Kingdom of Morocco. In this paper, we study the spatiotemporal transmission of the COVID-19 virus in the Kingdom of Morocco. By supporting a SIWIHR partial differential equation for the spread of the COVID-19 pandemic in Morocco as a case study. Our main goal is to characterize the optimum order of controlling the spread of the COVID-19 pandemic by adopting a vaccination strategy, the aim of which is to reduce the number of susceptible and infected individuals without vaccination and to maximize the recovered individuals by reducing the cost of vaccination using one of the vaccines approved by the World Health Organization. To do this, we proved the existence of a pair of control. It provides a description of the optimal controls in terms of state and auxiliary functions. Finally, we provided numerical simulations of data related to the transmission of the COVID-19 pandemic. Numerical results are presented to illustrate the effectiveness of the adopted approach.
A Mother�s Involvement in Preserving Patriarchal Power in Anita Desai�s Fasting, Feasting
Authors: Maharani Elizabeth Ratih , Rosiandani Ni Luh Putu
Published: February 2023

The issue of womens oppression is an actual issue which provokes endless discussion. This issue is the domain of feminists struggle until now. There are many theories of feminism in literature. This article employs psychoanalytic feminism approach to examine the relation between womens oppression and women's psyche to finally reveal that a mother (Mama) is involved in preserving the power of patriarchy in the family through her typical treatments toward her daughters (Uma and Aruna). Three conclusions can be drawn. Firstly, Mama is depicted as a narrow-minded, insecure, and status-oriented woman. Uma is an alienated, inferior and curious daughter. Aruna is a superior, status-oriented, and beauty-addicted daughter. Secondly, Mamas treatment reflects patriarchal values. She prioritizes her son to get nutritious food and qualified education. Mama burdens her daughters with great responsibilities to take care of the house, gives them less freedom for selfexpression, and teaches them that womens self-worth is determined by their physical attractiveness. Thirdly, there are two factors underlying Mamas involvement in preserving the power of patriarchy. The first factor is the influence of her mother who made distinctive treatments based on gender toward her children. The second factor is the influence of tradition that addresses child-rearing responsibilities to mothers. Fathers only set the rules, they do not participate in this duty. Mama passes this role down to her daughters. As a result, she is involved in preserving patriarchal power. Keywords: patriarchal power, psychoalanytic feminism, Anita Desai
Sociological Aspects and Local Specificity in the Classical Ketoprak Script of Surakarta Style
Authors: Setyawan Bagus Wahyu , Saddhono Kundharu , Rakhmawati Ani
Published: February 2023

Javanese literary works are reflections of the scriptwriters real world. Ketoprak script is one of the literary works of the traditional Javanese drama genre. There are several kinds of ketoprak scripts in Java and each region has different aspects. Each ketoprak text can reflect the social condition of its native area when analyzed by sociological literary-approach. Sociology of literature is a study that connects literature with its social reality. Classical ketoprak script of Surakarta style viewed from the perspective of sociological literature is a reflection of the socio-cultural life of the community in Surakarta. It is seen from a socio-historical perspective, socio-cultural, and linguistic aspects used in the classical ketoprak script of Surakarta style. These three aspects make the classical ketoprak script of Surakarta style has a local specificity and characteristics that distinguish it from other Javanese literature.Keywords: sociological aspect, local specificity, Javanese literature, classical ketoprak script
Awareness and Appreciation of Advertising Language
Authors: Tanto Trisnowati
Published: February 2023

This research focuses on advertising language in advertisement slogans of various products written in English. The grand theory used is Stylistics, which is the study of the style of language or the study of the use of distinctive linguistic expressions and how they affect the target audience. To limit the discussion, this research more specifically covered the use of rhetorical figures and doublespeak in advertising language. These language features basically have the same functions, namely the aesthetic and persuasive functions, which aim to attract the audiences attention. This research, using an explanatory research method, was done to find out peoples awareness and appreciation of the outstanding use of advertising language by distributing questionnaires with Likert scale to the students and alumni of the English Department of a private university in Indonesia. Considering that in an advertisement there is also the visual aspect besides the textual aspect, the research was also done to find out whether or not there is a strong correlation between peoples awareness and appreciation of the visual and textual aspects.Keywords: advertising language, awareness, appreciation
Laser Powder Bed Fusion Process Optimization of AlSi10Mg Alloy Using Selective Laser Melting: Dynamic Performance of Fatigue Behaviour, Microstructure, Hardness and Density
Authors:   Department of Mechanical Engineering, University College of Engineering (A), Osmania University, Telangana, INDIA, Nirish Mudda , Rajendra R. , Karolla Buschaiah
Published: February 2023

The quality of a selective laser melting (SLM) component depends on build orientation and layer thickness, which are directly influenced by processing parameters. The present research of layer-by-layer additive simulation before starting the SLM process has several advantages, such as saving time, cost, and material. In this main investigation, the dynamic performance of fatigue strength, density, and hardness of AlSi10Mg alloy was produced by the SLM-AM according to the design of experiments. The L9 orthogonal array of the Taguchi method was created to perform the experimental development process. Finally, the obtained optimal process parameter with the highest values of fatigue strength, density, and hardness was found at a laser power of 225 Watts, a scan speed of 500 mm/s, and a hatching distance of 100 μm. The experimental density result was achieved with a high density value of 99.6% (2.66 g/cm3) and a defect-free component and hardness of 126±5 HV. The future scope of this study will use optimal process parameters to find out mechanical properties for as built and preheated conditions for aerospace applications.
Low-cost Polyurethane Coating as Dielectric Component in Digital Microfluidics
Authors:   School of Physics, Engineering & Computer Science, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK, Abdul Latip E. N. ,   School of Mechanical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, MALAYSIA, Coudron L. ,   School of Physics, Engineering & Computer Science, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK, Tracey M. C. ,   School of Physics, Engineering & Computer Science, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK
Published: February 2023

Digital microfluidics (DMF) as a platform for precise handling of liquid droplets is a powerful tool but the affordability of the device has been one of the hindrances to its wide implementation. This paper reports the development of DMF devices using low-cost materials and simple deposition techniques specifically for the device dielectric component. Three commercial polyurethane coatings were investigated for their feasibility as the dielectric layer. The electrowetting behaviour of these materials was investigated by evaluating the change in contact angle with applied voltage of a water droplet sitting on the dielectric samples prepared using easy deposition methods such as spraying and spin coating. Devices were then fabricated using these materials to evaluate their capability to actuate droplets. Five types of polyurethane dielectric sample exhibited contact angle reversibility with hysteresis ranging between 4° to 25° after 250 VDC application. Droplet transportation back and forth across 8 electrodes at 180 VRMS has been demonstrated in a device made of one of the polyurethane coatings using a spraying technique. This result implies the potential of using polyurethane for future development of low-cost and disposable DMF devices.
Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion
Authors: Darki Saeed , Raskatov Evgeniy Yurevich ,   New Material and Technology Institute Ural Federal University
Published: February 2023

Considering the complexity of the radial forging process, the study of dynamic and thermodynamic parameters is of great importance. With the severe deformation of a workpiece in a plastic state, the effects of all parameters affecting the final geometry of the forging pipe need to be optimized. Thus, the mathematical model of the process is based on visco-plastic material, taking into account thermomechanical coupling and the surface properties during forging, including the hardness of the workpiece and friction. The results present the effects of a die angle on residual stress, total wear, and contact force, leading to ideal operating conditions and the ideal design of machine parts. In order to ensure the accuracy of the calculations and predictions made through software, a hardness test was performed experimentally, which showed the hardness curve of the microstructure and the strain of the workpiece. This indicates the consistency and accuracy of the results obtained from both methods. In order to improve the process and the tube employed, using an optimized die is recommended.
Study of Viscoelastic Behavior and Mechanical Characteristics of Graphene-Filled ABS Composites
Authors:   Department of Polymer Engineering, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-48, INDIA, Behera Basanta Kumar , M Thirumurugan ,   Department of Mechanical Engineering, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-48, INDIA
Published: February 2023

Acrylonitrile-Butadiene-Styrene (ABS) thermoplastic composites were reinforced with graphene fillers for three different weight ratios of 0.3%, 0.6%, and 0.9%. The compounding was prepared using a twin-screw extruder, and the specimens were made using an injection molding machine. The thermal gravimetric analysis (TGA)study revealed that the thermal stability of ABS composites was improved (~7%) by adding graphene fillers in pure ABS.The tensile and flexural strength of the ABS/grapheme composites was maximumwith the addition of 0.6 wt% graphene fillers. But the impact strength was reduced (~42%) for the addition of graphene fillers of more than 0.6 wt%. The stiffness of pure ABS was enhanced by more than ~27% with the addition of graphene fillers. It was found from a Dynamic Mechanical Analysis(DMA) study that the storage modulus and Tan Delta values of the composites were improved compared to pure ABS. The storage modulus was increased by more than ~70% over a wide range of temperatures. The addition of graphene fillers in the ABS matrix improved the glass transition temperature (increased from 110 ̊C to 118 ̊C). Scanning Electron Microscope (SEM) images confirmed the homogeneous mixing of the ABS matrix and the graphene fillers, and better dispersion was noticed with 0.6 wt% of graphene fillers.
A Comparative Study on the Physical and Rheological Properties of 60/70 and 80/100 Penetration Grade Bitumen in Malaysia
Authors:   Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS (UTP), 32610 Bandar Seri Iskandar, Perak, MALAYSIA, Santhanasamy Rickey , Sutanto Muslich Hartadi
Published: February 2023

The engineering properties of a bitumen plays vital role in determining the suitability of the bitumen usage for a pavement structure. Presently, bituminous pavements in Malaysia are constantly subjected to high-speed loading of vehicles as well as increased pavement temperature due to extreme solar heat which causes rutting and fatigue failure issues. In this research, the 60/70 and 80/100 penetration grade bitumen were subjected to both physical and rheological testing. Physical testing was used to determine the softening point, ductility, penetration and penetration index value whereas rheological testing chiefly determined the engineering properties of the bitumen such as complex modulus and phase angle which interprets the stiffness and viscoelastic behavior. Physical testing results indicate that the 60/70 penetration grade bitumen possesses lower penetration value, higher softening point, adequate ductility and higher penetration index value compared to the 80/100 penetration grade bitumen. Besides, rheological results show that the complex modulus and rutting factor of 60/70 bitumen indicates good stiffness towards temperature rise compared to the 80/100 penetration grade bitumen, thus, posing better resistance towards permanent deformation. Additionally, the 60/70 penetration grade bitumen generally possesses better elasticity compared to the 80/100 penetration grade bitumen which is observed through the phase angle determination.
Single Droplet Size and Volume Measurement – Comparison Between Experiment and Theory
Authors:   Fakulty of Mechanical Engineering and Technology, Universiti Malaysia Perlis (UniMAP), Main Campus Pauh Putra, 02600 Arau, Perlis, MALAYSIA, Illias Suhaimi , Hussain Suhaila , Ishak Mohamad Shaiful Ashrul , Abdul Rahman Md. Tasyrif , Awang @ Hashim Syamsul Syahrun , Selamat Salsuwanda ,   Faculty of Civil Engineering and Technology, Universiti Malaysia Perlis (UniMAP), Main Campus Pauh Putra, 02600 Arau, Perlis, MALAYSIA, Ani Mohd Hanafi ,   Department of Manufacturing and Materials, Kulliyyah of Engineering, International Islamic University Malaysia, PO Box, 50728 Kuala Lumpur, MALAYSIA
Published: February 2023

The main objective of this paper is to conduct a manual drop test experiment to investigate the actual size and volume of a single droplet. Both experimental result and theoretical value were calculated for comparison. In this study methanol was chosen as the test liquid. The drop test was repeated numerous times with the droplet size measurement being calculated for every 50, 100 and 150 drops. A digital weight measurement was used to precisely measure the droplet weight in the drop test. Meanwhile for theoretical calculation, measurement was made based on chemical properties of the liquid itself. Based on the comparison, it was found that the experimental measurement of droplet size and volume is comparable with the theoretical calculation.
El litio en Argentina
Authors: Barberón Agustín
Published: February 2023

Las importantes reservas de litio y el auge de inversiones destinadas a proyectos extractivos de los últimos años ubicaron a la Argentina entre los principales exportadores de carbonato de litio. La opción de proveer el commodity predomina sobre la estrategia de fomentar encadenamientos productivo-tecnológicos locales, a pesar de que el país cuenta con una trayectoria en investigación sobre el recurso y ha conformado una Red de Ciencia, Tecnología e Innovación en Litio. En este artículo se analizan las iniciativas que se han implementado en Argentina para agregar valor a los recursos litíferos del país, la política científico-tecnológica desarrollada en relación al tema y las principales acciones que se están llevando adelante actualmente.
Pengaruh Kemampuan Literasi Digital Peserta Didik dan Kreativitas Guru Terhadap Prestasi Belajar Matematika Peserta Didik kelas VIII
Authors: Nadila Diah , Nursalam  , Angriani Andi Dian
Published: February 2023

Penelitian ini bertujuan untuk mengetahui adanya pengaruh kemamapuan literasi digital peserta didik dan kreativitas guru terhadap prestasi belajar matematika kelas VIII Madrasah Tsanawiyah Negeri Gowa. Pendekatan penelitian ini menggunakan pendekatan kuantitatif dengan jenis penelitian ex-post-facto. Populasi dalam penelitian ini adalah peserta didik kelas VIII MTsN Gowa yang berjumlah 200 peserta didik dan sampel sebanyak 67 peserta didik. Beradasarkan hasil pengujian hipotesis dengan taraf signifikansi 5% diperoleh hasil yang menunjukkan bahwa (1) Kemampuan literasi digital peserta didik berpengaruh positif terhadap prestasi belajar matematika peserta didik kelas VIII MTsN Gowa sebesar 12,6%, (2) Kreativitas guru berpengaruh positif terhadap prestasi belajar matematika peserta didik kelas VIII MTsN Gowa sebesar 10,5%, (3) Kemampuan literasi digital peserta didik dan kreativitas guru berpengaruh positif terhadap prestasi belajar matematika peserta didik kelas VIII MTsN Gowa sebesar 17,7%. Dengan demikian,  jika kemampuan literasi digital peserta didik dan kreativitas guru meningkat, maka prestasi belajar matematika peserta didik kelas VIII Madrasah Tsanawiyah Negeri Gowa juga akan meningkat.
EFEKTIFITAS PENGGUNAAN METODE PROBLEM SOLVING DALAM MENCAPAI HASIL BELAJAR FISIKA SMP NEGERI 3 LEIHITU
Authors: Latukau Randi Hasim , Edi Saputra I Gede Purwana , Fatmalasari L Rizky , Permana Imam , Azmar Azmar
Published: February 2023

Penelitian ini dilakukan dalam upaya meningkatkan kualitas hasil belajar peserta didik di SMP Negeri 3 Leihitu dengan menerapkan metode Problemm Solving. Problem Solving yang diterapkan dalam penelitian ini lebih menekankan kemampuan peserta didik dalam menghadapi masalah dan menentukan solusi penyelesaian masalah. Peserta didik dipacu untuk kreatif, aktif dan tanggap terhadap masalah-masalah yang berkaitan dengan mata pelajaran fisika khususnya materi Gaya. Jenis penelitian yang digunakan adalah penelitian deskriftif. Sampel penelitian ini adalah siswa kelas VIII1 yang berjumlah 30 orang siswa. Efektifitas dari pembelajaran pada penelitian ini dapat diketahui setelah di lakukan analisis terhadap hasil tes yakni pre test dan post test. Efektifitas pencapaian standar kompetensi siswa dianalisis dengan menggunakan uji-t. Setelah melakukan analisis data diperoleh hasil bahwa pembelajaran dengan metode problem solving sangat efektifitas karena melalui uji-t dimana nilai thit lebih besar 22,13 yang di peroleh melalui nilai ttab sebesar 2,042. Sedangkan pada aspek kognitif, aspek afektif, dan aspek psikomotor siswa dengan metode ini terlihat bahwa tingkat penguasaan meningkat secara signifikan dengan presentase ketuntasan sebesar 96,66%.
The Effect of Metal Impregnation Of Fe Cu And Co on Surface Area of ZSM-5 Catalyst Analyzed Using Surface Area Analyzer (AAS)
Authors: Sihotang Andreas , Is Heriyanti Septina , Djangkung Sumbogo Murti Sri , Mirda Yanti Fusia , Farizt Ichsan Ahmad , Adiningtyas Putri Alya , Riski Gusti Diah
Published: February 2023

The number of watercrafts in the sea will have an impact on the amount of waste lubricant oil that is discharged into the sea, which ultimately results in pollution. The increasing level of hazardous and toxic materials (B3 waste) is concerned to have a wider impact on public health and environment quality. One of the B3 wastes that requires special handling due to its high quantities is used lubricating oil. Utilization and processing of waste lubricant oil discharged from the ship is an alternative that can be applied to reach efficient consumption of petroleum which is shrinking from year to year. Therefore, we need a processing method that can reduce the pollutants generated from the waste, one of which is the Acid Clay Treatment method. This treatment aims to determine the best conditions for reducing heave metal lead (Pb) through Acid Clay Treatment method and to assess the decrease in Pb concentration contained in used lubricating oil from ship. The adsorbent used was clay that has been activated with sulphuric acid. The processing of used lubricating oil was carried out using three variations, including adsorbent concentration, contact time, and acidity (pH). The test results of used oil lubricating oil processing were 15 gram of adsorbent concentration, 90 minutes of contact time, and pH 4. The Pb reduction efficiency obtained from Acid Clay Treatment method in the best conditions was 53.72%.
Hazard Analysis and Critical Control Points at Hospitals: How applied in Kendari City, Indonesia
Authors: Jayadipraja Erwin Azizi , Tobigo Reslin , Asrullah Muhammad , Depu Anry Hariadhin
Published: February 2023

Unsafe food for consumption can cause disease for humans, such as food poisoning and nosocomial infections. This study aimed to describe the implementation of Hazard Analysis and Critical Control Points (HACCP) in Hospitals in Kendari City, Indonesia. This study used analytical descriptive approach, with a survey design. It was conducted at General Hospital Bahteramas and in Kendari City General Hospital. The respondents were part of the nutrition staffs, hosts, and waiters with total of 25 people from Bahteramas General Hospital and 19 people from Kendari City General Hospital. The results revealed that the implementation of HACCP in hospitals had never been implemented effectively, at the Bahteramas General Hospital, the implementation of HACCP starting from stage 1 to stage 12 had not been entirely implemented. In addition, whilst the application of HACCP in stages 2 to 5 had been carried out at the Kendari City Hospital, the 1 and steps 6 through 12 were not applied yet. Thus, based on the concepts of food hygiene and sanitation, the hospitals must strengthen their food management efforts, in order to implement the HACCP system and for health workers, food handlers, and food servicers.
Immediate Effect of Elastic Taping Application on Gait Functional Ability in Patients with Stroke
Authors: Hartoko Rahadi Arie
Published: February 2023

Background: The typical consequence of a stroke is the limitation in walking ability. In stroke patients, there is a disruption of mobilization, including walking. Stroke patients exhibit abnormal walking patterns as compensation for muscular weakness. Elastic taping known to increase functional movement through increased muscle strength In addition; elastic taping helps maintain muscle coordination of agonists, synergists, and antagonists. Objective: Determine the immediate effect of elastic tape on the gait functional ability in post stroke patient with ankle dorsiflexor muscle weakness. Method: This research is an experimental pre-post study. The total subjects are 11 patients with hemiparesis following stroke. The gait speed, step length and stride length measured by gait analysis lab with CMAX gait software, before and after the elastic tape application for 30 minutes. Leukotape K® was applied with facilitation technique on the anterior tibial and extensor digitorum longus, from the origin to the insertion with 100% of stretch. Result: The gait speed and step length on healthy side after 30 minutes elastic tape increased when compared with the pre-application value (p>0.05). Conclusion: There is an increment of gait speed and step length on healthy side in post-stroke patients with ankle dorsiflexor weakness after 30 minutes elastic taping application. Elastic taping may be beneficial in treating gait functional disturbances in post-stroke patients.
EFEKTIVITAS IMAJINASI TERBIMBING (GUIDED IMAGERY) TERHADAP PENURUNAN NYERI PASIEN POST OPERASI : A LITERATUR REVIEW
Authors: Darmadi M. Nur Faizal , Hafid Muh Anwar , Patima Patima , Risnah Risnah
Published: February 2023

ABSTRAKPembedahan dapat menyebabkan ketidaknyamanan bagi pasien karena tindakan pembedahan dapat menyebabkan trauma pada jaringan yang dapat menimbulkan nyeri. Penatalaksanaan nyeri dapat dilakukan dengan teknik non farmakologi salah satunya dengan terapi guided imagery.Penelitian ini bertujuan untuk mengetahui mengetahui efektivitas imajinasi terbimbing terhadap penurunan nyeri pada pasien post operasi . Metode yang digunakan digunakan dalam ‘Literatur review diawali dengan pemilihan topik, kemudian ditentukan keyword  untuk pencarian jurnal menggunakan bahasa Indonesia dan Bahasa Inggris melalui beberapa database antara lain Pubmed, Springer link, dan Google Scholar. Kriteria inklusi dalam penelitian ini adalah artikel tahun 2010 sampai 2020, Fulltext artikel yang sesuai dengan topik literature dan fokus pada artikel yang menggunakan skala nyeri sebagai alat ukur.Hasil review artikel membuktikan bahwa terdapat efektivitas terapi imajinasi terbimbing penurunan skala nyeri pada pasien post operasi. Lima dari artikel menemukan secara statistik bahwa terjadi penurunan rasa nyeri pada pasien setelah diberikan terapi imajinasi terbimbing. Terapi imajinasi terbimbing juga dapat memberi kepuasan, kenyamanan, dan menurunkan kecemasan pada pasien post operasi. Terapi imajinasi terbimbing sebagai penatalaksanaan non- farmakologi dapat menurunkan nyeri post operasi. Terapi ini tidak menimbulkan efek samping, tidak memerlukan biaya, dan merupakan kegiatan non invasive yang mendukung model keperawatan holistik. Hasil Penelitian ini dapat dijadikan rujukan untuk penelitian berikutnya.