bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation on the Fouling and Heat Transfer Characteristics of Novel EGR Cooler (Semi-spiral) for Diesel Engine Fueled with Biodiesel
Authors: Jamali F. , Mustaqimah  , Ghobadian B. , Najafi G. , Zhang Bo , Jiang X.X 
Published: February 2021

Abstract
In this study, heat transfer characteristic and fouling of Novel EGR cooler (Semi-spiral) system were investigated. In this study, waste vegetable oil (Waste Cooking Oil) was used as feedstock for biodiesel production. The experiment was conducted in different loads (25%, 50% and 75%) and different speeds (2100rpm and 2400rpm). Four fuel blends were prepared and used (B0, B5, B10, and B15). The new EGR cooler has 6 tubes in length of 19 cm and overall heat transfer coefficient of 35.63 W/m^2 K which is acceptable with compared to overall heat transfer coefficient of shell and tube heat exchanger. Also, the total resistance of fouling (Rft) derived was 0.002712 m^2 K/W. The maximum heat transfer efficiency is 94% and the minimum heat transfer efficiency is 68%. Also, the results showed that when B0 is used, the deposition was 1.37 gr that amounts to 0.23gr/hr. When B15 is used, the deposition was I.21gr that amounts to 0.20gr/hr.
Implementation of Anti-Profanity Words in Mobile Application Platform
Authors: Razali F , Jusoh Z , Salleh@Omar A , Azizan N 
Published: February 2021

Abstract
Communication technology increases day by day in our daily life due to the rapid growth of variety mobile application platforms. For instance, mobile application users are using chat rooms for sharing data, pictures, videos and documents. However, the users are exposed to receive something inappropriate such as bad words, bad photos and sensitive data in their social media platforms. The developed chat profanity filtering application can be used to detect and filter the bad words before the sender send any messages via the application. One way to detect and filter profanity words is by using the PurgoMalum web service. Therefore, the recipients are unable to view any bad words sent to the chat application. This research has shown that the developed chat profanity filtering application will minimize the potential of users abusing the chat platform in daily communication. Result from this study had successfully demonstrated that the developed chat profanity filtering application could minimize the potentials for users to abuse the chat platforms in communicating various forms of obscenity. Therefore, chat profanity filtering application was developed to minimize the abusing of social media platform in daily communication.
Secure Database on Attendance Verification System by using Data Masking Technique
Authors: Miserom Siti Faizah , Sabri Shima , Aida Fatin Farina , Ismail Noraini 
Published: February 2021

Abstract
Data Masking Technique is a system designed to secure sensitive data by replacing the front data but not the original data. For instance, the data masking techniques capable to hide any data from being viewed by any unauthorized users. However, fewer studies about data masking techniques in the attendance system are implemented. Previous studies have primarily concentrated on defining sensitive data exposure and the technique of securing sensitive data using data masking. Therefore, the aim of this paper is to integrate the use of the data masking technique towards the attendance verification system. Thus, it is sufficient to stop unauthorized users from accessing confidential data. This study also applied the iterative model as a software development methodology as well as integrated with the hashing concept. Therefore, the attendance verification system can be used to perform the functionalities of easily manage records. By using this technique, the attendance of a student was added with a security element. The result shows that data masking and hashing techniques ensure the confidentiality of student data from being viewed by unauthorized parties. The authorized person is the ability to see the masked of sensitive student data. The significance of this study is capable to implement the security element on the attendance system and verify the user before entering the system
Modelling and Validation of Seismic Performance for Corner and Interior Beam-column Joint Using HYSTERES Program
Authors: Hamid N H , Hadi N D 
Published: February 2021

Abstract
The validation between experimental and modelled hysteresis loops is a preliminary work in determining the dynamic behaviour of the beam-column joints under earthquake excitations using Ruaumoko 2D program. However, this paper only focuses on accurately modelling the hysteresis loops of corner and interior beam-column joint using the HYSTERES Program. The corner and interior beam-column joints were designed using Eurocode 8 and equipped with unbonded fuse-bars which acts as passive energy dissipators. The hysteresis loops were modelled based on the input parameters obtained from the experimental hysteresis loops. From the HYSTERES program, the Pampanin Reinforced Concrete Beam-Column Joint was chosen to represent the hysteretic behaviour (load versus displacement) for overall seismic behaviour of these joints. The lateral strength capacity, stiffness, ductility and equivalent viscous damping from experimental and modelled hysteresis loops were then compared, and the percentage difference from both hysteresis loops was calculated. Based on the outcomes, there are some parameters which have shown good agreement, and this proves the effectiveness of using HYSTERES program in modelling the hysteresis loops of the beam-column joints.
Parcel Tracking System Using Barcode Scanner with Verified Notification
Authors: Zainudin Juanita , Samad Hafiza , Miserom Faizah , Sabri Shima 
Published: February 2021

AbstractThe emergence of electronic commerce online shopping has significantly increased the use of mail-order within Kolej University Poly-Tech Mara (KUPTM) communities. The tracking system provided by the courier services offers the status of delivery for each parcel until it reaches the designated destination. However, inefficiencies of managing the parcels at KUTPM may causing lost or misplaced. Therefore, the study offers an innovative approach where the study intended to invent a parcel tracking delivery and management systems for KUPTM communities. In particular, this invention relates to computerized tracking of delivered parcels using the barcode or tracking number that will notify recipients via Short Message Service (SMS) notification. The primary purpose of this study is to develop an efficient and secured system called the Parcel Tracking System. The system used a web-based service for managing and tracking the parcel. The development method of this system uses PHP and JavaScript programming languages in Adobe Dreamweaver platform with MySQL programme as the backend of the system. This paper focuses on the development process of the Parcel Tracking System. The findings found that the efficiencies of parcel tracking and security management are significantly improved. The application of Parcel Tracking System is promising and efficient for KUPTM communities. It is evidently that the proposed system was found successful and beneficial for KUPTM communities in tracking and managing parcels efficiently.
Techno-economic efficiencies and environmental criteria of Ocean Thermal Energy Conversion closed Rankine cycle using different working fluids
Authors: Samsuri N , Sazali N , Jamaludin A S , Razali M N M 
Published: February 2021

Abstract
Ocean Thermal Energy Conversion (OTEC) is a foundation for an appealing renewable energy technology owing to its vast and inexhaustible resources of energy, stability, and sustainable output. Development of OTEC power plant is to exploit the energy accumulated in between the top layer of warm surface seawater (heat source), and the cold layer of deep seawater (heat sink). It operates based on Rankine cycle to produce electricity between the source and the sink at the smallest temperature difference of approximately 20 K. OTEC power plant commonly utilized ammonia as working fluid. Nevertheless, ammonia poses potential lethal health risks and hazardous fluid. Hence, the effect of the working fluid types and the subsequent operation conditions may be critical and therefore become the subject of this study. In addition to OTEC power plant’s thermodynamic efficiencies study, this research also explores the economic efficiencies in term of capital cost per net power output ($/kW) and environmental criteria of different working fluids including that of ammonia, ammonia-water mixture (0.9), propane, and refrigerants (R22, R32, R134a, R143a, and R410a). The results showed that ammonia-water mixture gave the excellent performance with regard to the characteristics of heat transfer with the best thermodynamic efficiency of 4.04% compared to pure ammonia with 3.21%, propane with 3.09%, followed by refrigerants from 3.03% to 3.13%. Capital cost of using propane was economically efficient with 15730 $/kW compared to ammonia-water mixture at 16201$/kW, refrigerants from 16990 $/kW to 21400 $/kW, and pure ammonia being the costliest at 21700 $/kW. Despite being lower in its thermodynamic efficiency, propane gave the lowest capital cost and had the lowest toxicity in contrast to all other working fluids. Therefore, propane has the potential to be used as a clean and safe working fluid that would further enhance the OTEC technology.
Validation of Modal Analysis of Two-Storey Reinforced Concrete Frame
Authors: Azmi I F , Hamid N H , Mirza W I I Wan Iskandar , Abdul Rani M N , Yunus M A 
Published: February 2021

Abstract
The aim of this paper is to perform experimental modal analysis of two-storey reinforced concrete frame which designed using BS 8110 without seismic load and validate the experimental result with model using finite element analysis software. Experimental Modal Analysis (EMA) is the process of determining the modal parameters such as natural frequencies, damping factors, modal vectors and mode shape of a structure from a set of frequency response functions. The experimental work was conducted on half-scale of two-storey reinforced concrete frame at Heavy Structural Laboratory. Moreover, the Impact Modal Testing and response accelerometer are employed to determine the modes of vibration of a structure during experiments without imposed any in-plane lateral force. The experimental natural frequencies, which are extracted from measurements, exhibit good agreement with analytical model predictions. It shows that experimental modal analysis method can be usefully employed to investigate the dynamic behaviour of reinforced concrete frame due to the minimum percentage error between experimental modal analysis and computer software analysis.
Buckling Analysis of Curve Stiffened Fuselage Panel of Very Light Jet Aircraft
Authors: Chandra Devi , Satria Eka , Yusoff Nukman 
Published: February 2021

Abstract
Buckling characteristic of curve stiffened fuselage panel of very light jet (VLJ) aircraft which use one of rivet or friction stir welding (FSW) joint on its stringer-frame-skin connections has been investigated by employing finite element methods. The linear and non-linear finite element analyses were used to determine the effects of stringer shapes and pitch on the buckling load of the fuselage panel. The buckling modes of all fuselage panels have also been observed. The material, boundary, and geometric non-linearity were applied on the fuselage panel in the analysis. Degradation of material elastic modulus around Heat Affected Zone (HAZ) due to friction stir welding processes has been taken into account. The results show that the buckling load of curve FSW stiffened fuselage panel slightly smaller than that curve rivet stiffened fuselage panel for all stringer shapes and stringer pitch. Besides, the curve stiffened fuselage panel with a smaller stringer pith has a higher critical buckling load and higher loading capacity. Both curve rivet and curve FSW stiffened fuselage panels with close hat stringer shape have a better loading capacity than with the open hat and the Z-stringer shape.
Microstructure and Corrosion Rate of the Hot Rolled Mg- 1.6Gd Alloys as Prospective Degradable Implant Materials
Authors: Susanti O , Dwiputra D 
Published: February 2021

Abstract
At present, degradable materials implants with the capability of high loads for the temporary replacement of bones and biocompatible are not been available much more. Mg-Gd alloys have been intensively observed as appropriate degradable materials, since they combine a good strength and corrosion rate. Thus, the aim of this study is development of Mg-Gd alloys as materials implant with biomechanical tailored properties. Mg-1.6Gd alloys of hot rolled at severe reduction of 80% at 40 % per stage with a speed of 10 mm/min. The hot rolled was employed by cross rolling with 0° rolling direction first and followed by changing the rolling direction to 90° each pass (for two time). The hot rolled of the alloys have been investigated in the temperature range recrystallization (400- 550 °C). Meanwhile, the corrosion experiments also were research after 3, 7 and 14 days of immersion in Ringers solution. The phenomena of corrosion was observed using optical and weight of the samples before and after immersion. The Results show that the hot rolling techniques reveals refine microstructure with the grain size range of 50-60 μm. The number of precipitates have been founded on the cross rolling, particularly at the higher temperature and the highest corrosion rate occurs on the short immersion time for 3 days.
Thermogravimetric Analysis of Densified Coco Peat Briquettes
Authors: Pratoto A , Abhen A J 
Published: February 2021

AbstractThe present work deals with the investigation of thermal decomposition of densified coco peat briquettes using the thermogravimetry method to elucidate the effect of finite size of the biomass briquette on the decomposition profile. The cylindrical samples are varied in term of its density and its shape (sphericity). The sample is heated in a nitrogen atmosphere at different heating rates, ranging from 5°C/min to 20°C/min. The TG curves show three distinct phases of decomposition, i.e. preheating and drying, devolatilization, and char reduction. For all samples, thermal decomposition shifts to higher temperatures with the increase in the heating rate. From the TG curves, it is shown that the initial degradation temperature varies from 181°C to 302°C and the final degradation temperature varies from 328°C to 608°C. The shift to higher temperatures is also observed for the less dense briquettes. The shape of the briquettes affects also the decomposition profile. The less spherical (less of contact area) sample will decompose at higher temperatures. From the DTG curves, it can be seen that the maximum thermal degradation rate takes place at varying temperature ranging from 243°C to 419°C. The peak temperatures depend on the heating rate. However, the density and the shape of the biomass have no appreciable effect on the peak temperature.
Finite Element Modelling and Updating of a Thin Plate Structure using Normal Mode Analysis
Authors: Bahari A R , Yunus M A , Abdul Rani M N , Mirza W I I Wan Iskandar , Aziz Shah M A S , Yahya Z 
Published: February 2021

Abstract
Structural design and analysis require accurate and precise finite element model in order to have a structure with high safety conditions such as aerospace, offshore and civil structures. However, the predicted results of the finite element model are often considerably different from the experimental results due to the modelling assumptions and simplifications on the properties and parameters of the actual structure. This paper presents the finite element modelling and updating methods on the thin plate structure. The modal parameters obtained from the plate are measured by experimental modal analysis by using an impact hammer and roving accelerometers method under free-free boundary conditions. The initial modal parameters are predicted by numerical analysis using normal mode analysis via NASTRAN SOL 103. The accuracy of the natural frequencies and the mode shapes obtained from the initial finite element model are compared with the measured counterparts. The modal based updating methods using NASTRAN SOL 200 is applied to update the properties of the plate. In conclusion, updating the material properties of the plate is successfully achieved. The total error of the initial finite element model of the plate is reduce from 45.12 percent to 6.28 percent respectively.
In2O3 microspheres decorated with ZnIn2S4 nanosheets as core-shell hybrids for boosting visible-light photodegradation of organic dyes
Authors: Li Ping , Liang Tingting , Liu Huan , Li Jingzhe , Duo Shuwang , Xu Xun , Qiu Lingfang , Wen Xiaoqing , Shi Raoyuan 
Published: February 2021

Abstract
In this work, we firstly report the development of ZnIn2S4 nanosheets decorating In2O3 microspheres with core–shell structure by an in situ synthetic process, which is proved to be an effective method to construct promising semiconductor photocatalysts for photodegradation of methyl blue (MB) under visible-light conditions. Under visible-light illumination, the 2D/3D ZnIn2S4 nanosheet/In2O3 microsphere hybrids exhibit excellent enhancing photoactivity than that of pristine In2O3, The effect of ZnIn2S4 substitution on photoactivity was also investigated for comparative experiments and it was found that the optimized ZnIn2S4/In2O3-1:1 hybrid exhibits the highest photoactivity of 84.5%. The experimental results indicated that the reputably photocatalytic performance of ZnIn2S4/In2O3 can be attributed to the synergistic effect of efficient separation of photo-generated electron-hole pairs, extended visible-light response range, and the improved specific surface area. Furthermore, the roles of ·

O

2

−

,

·OH, and h+ during the photodegradation process were studied to deduce the possible degradation mechanism. This work provides an effective strategy to construct the In2O3-based photocatalytic systems for efficient photodegradation of organic pollutants, which would be significant for the design of more In2O3-based systems for promising photocatalytic applications.
Home and Workplace Neighborhood Socioeconomic Status and Behavior-related Health: A Within-individual Analysis
Authors: Raza Auriba , Claeson Martin , Magnusson Hanson Linda , Westerlund Hugo , Virtanen Marianna , Halonen Jaana I 
Published: February 2021

Abstract

Background
The influence of individual and home neighborhood socioeconomic status (SES) on health-related behaviors have been widely studied, but the majority of these studies have neglected the possible impact of the workplace neighborhood SES.

Objective
To examine within-individual associations between home and work place neighborhood SES and health-related behaviors in employed individuals.

Methods
We used participants from the Swedish Longitudinal Occupational Survey of Health who responded to a minimum of two surveys between 2012 and 2018. Data included 12,932 individuals with a total of 35,332 observations. We used fixed-effects analysis with conditional logistic regression to examine within-individual associations of home, workplace, as well as time-weighted home and workplace neighborhood SES index, with self-reported obesity, physical activity, smoking, excessive alcohol consumption, sedentary lifestyle, and disturbed sleep.

Results
After adjustment for covariates, participants were more likely to engage in risky alcohol consumption when they worked in a workplace that was located in the highest SES area compared to time when they worked in a workplace that was located in the lowest SES area (adjusted odds ratios 1.98; 95% confidence interval: 1.12 to 3.49). There was an indication of an increased risk of obesity when individuals worked in the highest compared to the time when they worked in the lowest neighborhood SES area (1.71; 1.02–2.87). No associations were observed for the other outcomes.

Conclusion
These within-individual comparisons suggest that workplace neighborhood SES might have a role in health-related behaviors, particularly alcohol consumption.
The Impact of a Randomized Controlled Trial of a Lifestyle Intervention on Sleep Among Latina Postpartum Women
Authors: Hawkins Marquis , Marcus Bess , Pekow Penelope , Rosal Milagros C , Tucker Katherine L , Spencer Rebecca M C , Chasan-Taber Lisa 
Published: February 2021

Abstract

Background
Poor sleep is associated with adverse outcomes among postpartum women. Exercise may improve sleep, but this has not been well examined in the postpartum period.

Purpose
To examine the impact of a culturally modified, individually tailored lifestyle intervention on sleep outcomes among postpartum Latina women.

Methods
Estudio PARTO was a randomized controlled trial aimed at reducing Type 2 diabetes among Latina women with abnormal glucose tolerance in pregnancy. Participants were randomized to a lifestyle (i.e., diet and exercise; n = 70) or a health and wellness control intervention (n = 78) in late pregnancy (baseline). The Pittsburgh Sleep Quality Index (PSQI) was used to measure sleep quality (PSQI score), onset latency (minutes per night), duration (hours per night), efficiency (percentage of the time in bed asleep), and daytime dysfunction at baseline, 6 weeks, 6 months, and 12 months postpartum.

Results
Mean PSQI score (6.56 ± 3.87), sleep duration (6.84 ± 1.75 hr/night), and sleep efficiency (79.70% ± 18.10%) did not differ between the arms at baseline. Mixed-effects models indicated a greater decrease of 1.29 in PSQI score (i.e., improved sleep quality) in the lifestyle versus health and wellness arm (95% confidence interval [CI] = −2.50 to −0.08, p = .04) over follow-up. There was the suggestion of a smaller decrease in sleep duration (mean = 0.48 hr/night, 95% CI = −0.10 to 1.06, p = .10) in the lifestyle versus health and wellness arm. There were no statistically significant differences in other sleep outcomes between arms.

Conclusions
Findings suggest that lifestyle interventions improve sleep quality but not sleep duration, sleep onset latency, sleep efficiency, or daytime dysfunction in postpartum Latina women and, therefore, may hold promise for improving subsequent mental and physical health in this population.

Clinical Trials Registration
NCT01679210.
Hope, Optimism, and Clinical Pain: A Meta-Analysis
Authors: Shanahan Mackenzie L , Fischer Ian C , Hirsh Adam T , Stewart Jesse C , Rand Kevin L 
Published: February 2021

AbstractBackgroundGeneralized expectancies have been theorized to play key roles in pain-related outcomes, but the empirical findings have been mixed.PurposeThe primary aim of this meta-analysis was to quantify the relationships between two of the most researched positive generalized expectancies (i.e., hope and optimism) and pain-related outcomes (i.e., pain severity, physical functioning, and psychological dysfunction) for those experiencing clinical pain.MethodsA total of 96 studies and 31,780 participants with a broad array of pain diagnoses were included in analyses, using random-effects models.ResultsBoth hope and optimism had negative correlations with pain severity (hope: r = –.168, p &lt; .001; optimism: r = –.157, p &lt; .001), positive correlations with physical functioning (hope: r = .199, p &lt; .001; optimism: r = .175, p &lt; .001), and negative correlations with psychological dysfunction (hope: r = –.349, p = .001; optimism: r = –.430, p &lt;.001).ConclusionThe current findings suggest that hope and optimism are similarly associated with adaptive pain-related outcomes. Future research should examine the efficacy of interventions on hope and optimism in ameliorating the experience of clinical pain.