bluuebunny/crossref_metadata_2025_split huggingface dataset:
Daylight performance of horizontal light pipe and shading systems in office room with bilateral opening
Authors: Elsiana F , Ekasiwi SNN , Antaryama IGN 
Published: December 2023

Abstract
Daylighting implementation in the building can reduce building energy use. Previous research about Horizontal Light Pipe and shading systems in the Tropics examined daylighting strategies in a room with a unilateral opening, which receives daylight through a window in one wall. The bilateral openings from two adjacent side windows have the potential to improve daylight distribution and have yet to be discussed in previous research. This research evaluates the daylight level and distribution of HLP and shading systems in a room with a bilateral opening from two adjacent windows. The research method is experimental with simulation using IES-VE (Integrated Environment Solution-Virtual Environment) as a tool. The Daylight Factor (DF) and Uniformity Daylight Factor (UDF) of a room with bilateral openings from two adjacent windows were compared with a room with bilateral openings, HLP, and shading systems. The results indicate that integrating HLP and shading systems in an office room with two adjacent side windows decreases the average Daylight Factor (DF) by 48.74%, bringing the average DF fulfilling the recommended DF level for the office room. HLP and shading systems improve the Uniformity Daylight Factor and percentage of sensor points with DF 2-5%, as high as 56% and 67.38%, sequentially.
Experimental investigation of nucleate pool boiling heat transfer characteristics on modified copper surface via laser-structured microstructures
Authors: Sugumaran L , Zubir M N M , Newaz K M S , Zahari T Z T , Aznam S M , Halil A M 
Published: December 2023

Abstract
This study aims to evaluate the performance of pool boiling heat transfer on a structured surface subjected to constant heat flux. A nanosecond laser ablation was used to create different surface profiles on copper samples. Specifically, a series of step-like microstructured surfaces with varying secondary groove widths were fabricated to investigate their effect on pool boiling heat transfer performance of distilled water. The results indicated a significant enhancement in heat transfer performance for the laser-structured surfaces compared to the smooth surface at low heat flux. This improvement was attributed to the increased surface area, nucleation frequency, and nucleation site density. However, at higher heat flux, the surface with a smaller secondary groove width (LS 2) exhibited a decline in heat transfer performance, which was likely due to larger bubble escaping resistance. In contrast, the surface with a larger secondary groove width (LS 1) demonstrated the best heat transfer performance. The current work would help in finding an optimum surface structuring design for gaining higher boiling heat transfer performance which benefits industries dealing with thermal management processes.
A real-time thermal behaviour monitoring and analysis of a 500 kWh grid-connected battery energy storage system
Authors: Shahroom Afif Firdaus , Mansor Muhammad , Ying Yong Jia , Abd. Rahman Muhamad Safwan 
Published: December 2023

Abstract
Statistical analysis yields critical data for risk evaluation and management of a stationary battery energy storage system (BESS). Lithium-ion (Li-ion) batteries have attained huge attention for both stationary and non-stationary applications due to their lucrative features such as lightweight, high energy density efficiency, and long lifespan. However, detailed analysis and trends subjected to thermal behaviour of the device especially in grid-connected BESS application is still neglected. Therefore, this paper presents a statistical analysis for thermal behaviour of a grid connected BESS. The significance of Li-ion battery employing battery thermal management is presented, which can guarantee a reliable and safe operation as well as examining the effect of voltage, current and state of charge (SOC) on BESS operation. The large group of datasets recorded daily with five-minute intervals are difficult to be analysed numerically in a timely manner. Thus, the analysis can be made by visualizing the numerical data that was retrieved through representational state transfer (REST API) for easier interpretation and trend analysis. The visualization is made using Microsoft Power BI and presented in this paper.
Thermal performance of serpentine channel immersion cooling for lithium-ion battery 18650 with HFE-7100
Authors: Febriyanto R , Pranoto I , Ariyadi H M , Khasani  
Published: December 2023

Abstract
This paper presents Serpentine Channel Immersion Cooling (SCIC) as a new design for battery immersion cooling applications using HFE-7100 dielectric fluid. The main objective of this research is to analyze the temperature generation characteristics of Li-ion batteries with the performance of natural convection (NC) and Serpentine Channel Immersion Cooling (SCIC) with HFE-7100 liquid. The depth of discharge (DoD) is carried out at 80% of the battery capacity during the discharge process with variations in C-rates of 1 C, 1.5 C, and 2 C. The results show that the C-rate has a greater value, the temperature value released by the battery will also be greater. The negative pole, intermediate battery, and positive pole exhibit the characteristics of the battery pack’s surface temperature in order from highest to lowest throughout the discharge process. At the negative pole of the battery, the highest temperature in NC cooling is 30.1°C, 32.3°C, and 33.3°C can reduce this temperature to 28.8°C, 29.73°C, 31.8°C by SCIC with HFE-7100 liquid at DoD 1 C, 1.5 C, and 2 C respectively. Battery surface temperature characteristics based on channel position from highest to lowest using NC in the order of 6-3-2-4-5-1 and SCIC in the order of 6-5-4-3-2-1.
Effect of annealing time on the structural stability of LiCo0.55Ni0.4Ti0.05O2 cathode material via combustion method
Authors: Azahidi A , Kasim M F , Elong K , Kamarulzaman N 
Published: December 2023

Abstract
Layered LiNi1-xCoxO2 cathode material, particularly LiCo0.6Ni0.4O2 (LCN) in stoichiometry is one of the promising cathode materials as it possesses a good electrochemical behaviour and performances comparable with commercial LiCoO2 (LCO) cathode material. However, more improvement needs to be done in LCN cathode material in terms of higher toxic Co content and higher cation mixing in the material which mainly contributes to the structural instability and affects the capacity fading of the material. To combat both significant issues in the material, the stability of that material structure needs to be tackled first. In this study, Co was partially substituted with Ti4+ to give the LiCo0.55Ni0.4Ti0.05O2 (LCNT) cathode material using the combustion method. To get the optimum condition of LCNT, the precursor was then calcined at a temperature of 750°C for 24 hours, 48 hours and 72 hours and denoted as LCNT24, LCNT48, and LCNT72 respectively. XRD reveals that all samples are pure, single-phase with no impurities present except for LCNT72. Nano-sized LCNT24 sample has the highest RIR value of 1.84 indicating the lowest degree of cation Li+/Ni2+ mixing in the material and the most stable structure compared to others.
Nutritional value of sea cucumber Acaudina molpadiodes from Delta Wulan Estuary, Demak Regency, Central of Java, Indonesia
Authors: Widianingsih W , Hartati R 
Published: December 2023

Abstract
Sea cucumber Acaudina molpadiodes has a nutritional value that can be utilized as a functional food for humans. Therefore, this study aims to examine the composition of proximate, fatty acid, and amino acids in A. molpadiodes. The samples were collected from Delta Wulan Estuary, Demak Regency, Central Java, Indonesia. Based on the result of this study, the average value of moisture, protein, carbohydrate, total lipid, and ash contents in A. molpadiodes ranged between 90.44 – 91.23%, 4.44 – 4.97%, 4.12-4.35%, 0.16-0.18%, and 0.05-0.06% respectively. According to the result of amino acid analysis, the profile of essential amino acids comprised phenylalanine, isoleucine, valine, lysine, leucine, threonine, histidine, cysteine, methionine, and tryptophan. The average value of leucine content was 2273.95 ± 291.61 mg.kg-1, and the threonine content was 2732 ± 276.93 mg.kg-1. The non-essential amino acid profile consisted of glutamic acid, alanine, glycine, aspartic acid, tyrosine, proline, and taurine. The glycine and glutamic acid content in A. molpadiodes are 6843.67 ±393.71 mg.kg-1 and 5975.06 ± 687.85 mg.kg-1. Fatty acid profiles in A. molpadiodes are DHA (docosahexaenoic), EPA (Eicosapentaenoic acid), and AA (Arachidonic acid with an average value of 2.03 ±0.17 mg.100g-1, 2.42 ± 0.83 mg.100g-1, and 6.20±1.56 mg.100g-1.
Variation in Eastern Little Tuna (Euthynnus affinis) catches related to El Niño Southern Oscillation (ENSO) events in the Makassar Strait
Authors: Syamsuddin M L , Puspita A R , Syamsudin F , Ihsan Y N , Sunarto  , Zainuddin M 
Published: December 2023

Abstract
In order to determine how the El Niño Southern Oscillation (ENSO) affects Eastern Little Tuna catch rates in the Makassar Strait (MS), satellite-derived oceanographic variables, including sea surface temperature (SST), chlorophyll-a, salinity, sea surface height (SSH), ocean current, Niño index 3.4, and Eastern Little Tuna (Euthynnus affinis) catch data were used. Analyses were conducted for a seven-year period (January 2015-December 2021), which included the El Niño (2015) and La Niña (2021) events. A higher CPUE value is obtained in 2021 when La Niña occurs with a CPUE value of 3973 kg/trip, compared to the El Niño event. Based on seasonal variations, the highest catch was recorded during the northwest monsoon (706.02 kg/trip) with 2789 fishing points, while the lowest occurred during the southeast monsoon (700 kg/trip) with 2942 fishing points. The CPUE was 16.25 kg/trip with 1133 fishing points during El Niño and 23.56 kg/trip with 1027 fishing points during La Niña, respectively. The fishing grounds area was wider during the La Niña period, at 2 - 8°S and 115 - 120°E. This study revealed a strong impact of the La Niña events, significantly increasing Eastern Little Tuna catch in the MS.
The effect of continuous lighting on the rearing of yellowfin tuna (Thunnus albacares) larvae
Authors: Slamet Bejo , Hutapea Jhon H. , Gunawan  , Setiadi Ananto 
Published: December 2023

Abstract
Yellowfin tuna (Thunnus albacares) has important economic value in the world market. This study aims to determine the effect of continuous lighting on survival, growth, stomach contents, and histology of the eye of larvae. Larval rearing was conducted on 6 concrete tanks with 60 m3 in volume that support the water circulation and aeration system with an initial stocking of 20 eggs/liter. The treatments tested were A: Larval rearing by a 40-watt fluorescent lamp (TL) which was positioned 1 m above the surface of the water surface for 24 hours and B: Without lights (control). Each treatment used 3 repetitions and data analysis with a t-test. The parameters observed were larval survival and growth stomach content and eyes histology. The results showed that the rearing of larvae in treatment B can with a survival of 0.26±0.0231% and a final total length of 3 6.2 ± 7.3 mm which is significantly higher (P<0.05) compared to treatment A (0.10±0.057% and 24.3 ± 5.5 mm). From the observation of stomach contents at night in treatment B still eats rotifers while in treatment A stomach is empty. The inner nuclear layer cell arrangement of larval eyes is more tenuous than control. From these results, it can be concluded that the provision of continuous lighting treatment can improve the survival, growth, stomach content, and vision ability of larvae.
Performance Of Maintaining Brood Stock of Clarias gariepinus With Different Densities
Authors: Prabowo G , Kristiany M G E , Marlina E , Suhermanto A , Adi C A 
Published: December 2023

AbstractAfrican catfish is a type of fish that is favored by Indonesian people. In the cultivation, availability of broodstock determines the success rate of production. A well-managed of broodstock will produce high productivity. Productivity is measured from the time interval of broodstock required to produce eggs after spawning, the fecundity and hatching rate. The density of broodstock will affect on productivity. This study aims to determine the right broodstock density in order produce eggs continously. The main container used is a cement tank with dimensions of 1 × 1 m2and 1,2 m depth. The broodstock were reared in a recirculating system with stocking densities of 5, 10 and 15 fish/m2. Each treatment was repeated in 3 times. During maintenance, the number of broodstock was fed with floating pellets at 3% per day with the provision of 2 times every day. The results of water quality measurements as supporting data include temperature, pH, ammonia, nitrite and nitrate. Productivity was measured during 3 months of rearing to determine the egg production cycle. The productivity of broodstock with a stocking density of 15 fish/m2resulted in a faster gonadal maturity level. However, the resulting fecundity, Fertilization Rate and Hatching Rate were better at the number of stocking 10 and 5 fish/m2.
Physical, chemical and sensory properties of cookies added with Arthrospira platensis granules and stevia sugar
Authors: Raharjo S , Ekantari N 
Published: December 2023

Abstract
Cookies can be supplemented with the protein, fatty acids, vitamins, and minerals present in Arthrospira platensis, however adding the powder alters the product’s flavor, color, and aroma. Granulating the powder, which has the benefit of not being easily soluble in the dough, is one technique to reduce the fishy smell and flavor and boost consumer acceptance. Stevia sugar is used in this study to make low-calorie cookies in place of sucrose sugar. This study conduct to ascertain how the inclusion of Arthrospira granules and stevia sugar affected sensory qualities and levels of customer acceptance. The study 2×4 totally random design included stevia sugar replacement (30%; 50%) and granule addition (3%; 6%; 9% (w/w dough)) with 0% serving as the control. The results showed that stevia sugar affected swelling volume and that granules affected granule appearance, color, and flavor. A follow-up test was carried out because, with sensory averages of like-really like, the G1S1 (3% granules: 30% stevia) and G1S2 (3% granules: 50% stevia) treatments were not significantly different based on hedonics. Although the ash content was not considerably different, the water content and overall sugar content were. In the depth investigation revealed that 3% of granules can be added to arthrospira to lessen its fishy flavor. The Time Intensity results show that G1S1 treatment produces the best Arthrospira platensis granula cookies that can be utilized as an alternative functional food, whereas G1S2 treatment produces a very bitter aftertaste.
Direct numerical simulations on oscillating flow past surface-mounted finite-height circular cylinder
Authors: Kumar Abhishek , Kumar Prashant , Tiwari Shaligram 
Published: December 2023

Abstract
In this work, a surface-mounted circular cylinder with a fixed aspect ratio (ratio of height of the cylinder to its diameter) of 5 is subjected to a non-zero mean oscillating flow with a range of frequencies and amplitudes. Three-dimensional direct numerical simulations are then conducted on this finite-height cylinder. The mass and momentum equations are resolved using the finite volume-based Open Source Field Operation and Manipulation (OpenFOAM). A fixed Reynolds number

Re

=

U
o

D

/

ν

of 250 is used in this study, which is defined based on mean velocity at the inlet (

U
o

) and cylinder diameter (D). Here

ν

is the kinematic viscosity of the working fluid. Non-dimensional velocity oscillation amplitude (

A

∗

=

a

/

U
o

) is varied from 0.1 to 0.3, while the non-dimensional oscillation frequency (

f

∗

=

f

/

f
o

) takes the values of 0.33, 0.5, 1, 2, and 3. Here a and f are the dimensional oscillation amplitude and frequency, respectively and

f
o

is the vortex shedding frequency corresponding to a uniform flow at Re = 250. The three-dimensional vortex structures, presented with the help of iso-Q surfaces, show that the oscillating flow changes the size and shape of the hairpin-shaped vortices. Wake is found to be synchronized with the oscillation frequency at f* = 2 for each value of the A* and results in the maximum lift force on the cylinder. Hilbert Huang transformation analysis of the transverse velocity signals at a specific point in the wake reveals that the wake is more complex and aperiodic in nature for f* values of 0.33, 0.5, and 1, whereas it is periodic for f* = 2 and 3. In order to further disclose the nonlinearity associated with the oscillating flow, the degree of stationarity is discussed corresponding to each value of A* and f*. Dynamic mode decomposition is exploited to obtain information about the coherent vortical structures and their spatial and temporal behavior in the wake with a change in the value of f*. Effects of A* and f* on the dynamic characteristics are also investigated.
Study on interfacial morphologies of AA1060 and SS321 magnetic pulse welded joints
Authors: Su Shan , Wang Yiming , Wu Yuanyuan , Wang Ruichen 
Published: December 2023

Abstract
In this study, the application of magnetic pulse welding was employed for the production of tubular joints using 1060 aluminium and 321 stainless steel. Two crucial process parameters, the charging voltage, and the gap between the outer and inner tubes, were subjected to mechanical property tests and morphology analysis. The joints that exhibited favourable mechanical properties were obtained with a gap size of 1.25 mm and a charging voltage exceeding 3.5 kV. The presence of intermetallic compounds at the joint interface indicates the occurrence of fusion in the transition zone. The quantity of molten metal increased with an increase in the charging voltage. The aluminium content in the intermetallic compounds within the transition zone decreased as one moved from the 1060 aluminium side towards the 321 stainless steel side. The gap distance plays an important role in determining the efficiency of energy transformation at the joint interface during magnetic pulse welding (MPW). A smaller gap distance resulted in a substantial amount of energy being transformed into plastic deformation in the transition zone. Conversely, a greater gap distance led to a significant amount of energy from the electrical charging voltage being converted into thermal energy. The MPW joint consisted of bonding, mechanical interlock, and non-bonding regions. The mechanical properties of the joint were influenced by the composition of the intermetallic compound. Taking into account the impact of morphologies and elastic modulus of the transition zone, an increase in the melting of stainless steel during the welding process was found to be advantageous for the MPW of 1060 aluminium to 321 stainless steel.
Fire-modulated fluctuations in nutrient availability stimulate biome-scale floristic turnover in time, and elevated species richness, in low-nutrient fynbos heathland
Authors: Verboom G Anthony , Slingsby Jasper A , Cramer Michael D 
Published: December 2023

Abstract

Background and Aims
In many systems, postfire vegetation recovery is characterized by temporal changes in plant species composition and richness. We attribute this to changes in resource availability with time since fire, with the magnitude of species turnover determined by the degree of resource limitation. Here, we test the hypothesis that postfire species turnover in South African fynbos heathland is powered by fire-modulated changes in nutrient availability, with the magnitude of turnover in nutrient-constrained fynbos being greater than in fertile renosterveld shrubland. We also test the hypothesis that floristic overlaps between fynbos and renosterveld are attributable to nutritional augmentation of fynbos soils immediately after fire.

Methods
We use vegetation survey data from two sites on the Cape Peninsula to compare changes in species richness and composition with time since fire.

Key Results
Fynbos communities display a clear decline in species richness with time since fire, whereas no such decline is apparent in renosterveld. In fynbos, declining species richness is associated with declines in the richness of plant families having high foliar concentrations of nitrogen, phosphorus and potassium and possessing attributes that are nutritionally costly. In contrast, families that dominate late-succession fynbos possess adaptations for the acquisition and retention of sparse nutrients. At the family level, recently burnt fynbos is compositionally more similar to renosterveld than is mature fynbos.

Conclusions
Our data suggest that nutritionally driven species turnover contributes significantly to fynbos community richness. We propose that the extremely low baseline fertility of fynbos soils serves to lengthen the nutritional resource axis along which species can differentiate and coexist, thereby providing the opportunity for low-nutrient extremophiles to coexist spatially with species adapted to more fertile soil. This mechanism has the potential to operate in any resource-constrained system in which episodic disturbance affects resource availability.
Associations Between Generativity and Social Asymmetry Among Older Adults in Japan
Authors: Ong Anthony D , Graham Eileen K , Jackson Kathryn , Atherton Olivia E , Luo Jing , Willroth Emily C , Beck Emorie D , Yoneda Tomiko , Cintron Dakota W , Mroczek Daniel K , Steptoe Andrew 
Published: December 2023

Abstract

Objectives
Loneliness and social isolation are major public health concerns among older adults in Japan. Generativity, the concern for and commitment to future generations, may buffer older adults from loneliness. This study examined the cross-sectional and longitudinal associations between generativity and social asymmetry (the discrepancy between social isolation and loneliness) among older adults in Japan.

Methods
Data were from 2 waves (2008 and 2012) of the Midlife in Japan survey, a nationally representative longitudinal study of 645 adults aged 30–79 residing in the Tokyo metropolitan area. Generativity was measured using the 6-item Loyola Generativity Scale. Social asymmetry was computed as the residual score from regressing loneliness onto social isolation.

Results
Higher generativity levels were associated with lower social asymmetry scores (B=−0.21, SE=0.04), but generativity change across waves did not predict social asymmetry 4 years later (B=−0.04, SE=0.06).

Discussion
Generativity may play a protective role in buffering older adults from the adverse effects of social isolation on loneliness. Promoting generativity among older adults may be a potential intervention strategy to reduce loneliness and improve well-being in aging populations in Japan.