bluuebunny/crossref_metadata_2025 huggingface dataset:
A new assessment method on co-occurring mountain and plain floods based on copula functions
Authors: Wang Leizhi , Li Lingjie , Wang Yintang , Cui Tingting , Su Xin , Zhang Ye , Li Xiting , Gai Yongwei
Published: June 2024

Adjacent mountain area and plain area generally belong to the same climate zone, and a close hydraulic connection is also found between them. However, the flood controls in these two areas belong to different management departments. Flood occurring in these two areas can bring serious waterlog disasters, posing great threat to human lives and property. Previous studies mainly focused on the individual flood event in mountain or plain areas, while the research on the floods simultaneously occurring in both areas is insufficient. Hence, this study establishes a copula function-based assessment method to systematically analyze the characteristics of simultaneously-occurring floods in mountain and plain areas in Hangzhou City, thereby providing a basis for the collaborative management of floods in both areas. Results show that the proposed approach can give water level combinations in mountain and plain areas that are prone to co-occurring floods. Moreover, the water level in plain area is most likely to simultaneously appear with the water level in mountain areas under similar return periods, indicating that floods of equivalent level are likely to occur in plain areas when severe floods occur in mountain areas. This study provides a better understanding on the interplay of floods simultaneously occurring in mountain and plain areas, offering insights for coordinating the flood protection system in these two areas.
Quantitative maximal diameter rigidity of positive Ricci curvature
Authors: Ren Tianyin , Rong Xiaochun
Published: June 2024

In Riemannian geometry, the Cheng’s maximal diameter rigidity theorem says that
if a complete n-manifold M of Ricci curvature,

Ric
M

≥

(

n
-
1

)

{\operatorname{Ric}_{M}\geq(n-1)}

, has
the maximal diameter π, then M is isometric to the unit sphere

S
1
n

{S^{n}_{1}}

.
The main result in this paper is a quantitative maximal diameter rigidity: if M
satisfies that

Ric
M

≥

n
-
1

{\operatorname{Ric}_{M}\geq n-1}

,

diam
⁡

(
M
)

≈
π

{\operatorname{diam}(M)\approx\pi}

, and the
Riemannian universal cover of every metric ball in M of a definite radius
satisfies a Reifenberg condition, then M is diffeomorphic and bi-Hölder
close to

S
1
n

{S^{n}_{1}}

.
The Weil bound for generalized Kloosterman sums of half-integral weight
Authors: Andersen Nickolas , Anderson Gradin , Woodall Amy
Published: June 2024

Let L be an even lattice of odd rank with discriminant group

L
′

/
L

{L^{\prime}/L}

, and let

α
,
β

∈

L
′

/
L

{\alpha,\beta\in L^{\prime}/L}

.
We prove the Weil bound for the Kloosterman sums

S

α
,
β

⁢

(
m
,
n
,
c
)

{S_{\alpha,\beta}(m,n,c)}

of half-integral weight for the Weil Representation attached to L.
We obtain this bound by proving an identity that relates a divisor sum of Kloosterman sums to a sparse exponential sum.
This identity generalizes Kohnen’s identity for plus space Kloosterman sums with the theta multiplier system.
Arithmetic Bohr radius for the Minkowski space
Authors: Allu Vasudevarao , Halder Himadri , Pal Subhadip
Published: June 2024

The main aim of this paper is to study the arithmetic Bohr radius for holomorphic functions defined on a Reinhardt domain in

ℂ
n

{\mathbb{C}^{n}}

with positive real part. The present investigation is motivated by the work of Lev Aizenberg [Proc. Amer. Math. Soc. 128 (2000), 2611–2619]. A part of our study in the present paper includes a connection between the classical Bohr radius and the arithmetic Bohr radius of unit ball in the Minkowski space

ℓ
q
n

{\ell^{n}_{q}}

,

1
≤
q
≤
∞

{1\leq q\leq\infty}

. Further, we determine the exact value of a Bohr radius in terms of arithmetic Bohr radius.
Asai gamma factors over finite fields
Authors: Chai Jingsong
Published: June 2024

In this note, we define and study Asai gamma factors over finite fields. We also prove some results about local Asai L-functions over p-adic fields for level zero representations.
A note on higher order Dirac operators in Clifford analysis
Authors: Alfonso Santiesteban Daniel
Published: June 2024

In the framework of Clifford analysis, we study higher order Dirac operators constructed with k-vectors. We find a necessary and sufficient condition to determine whether a function cancels them.
The influence of c-subnormality subgroups on the structure of finite groups
Authors: Jaraden Dana , Ateiwi Ali , Jaraden Jehad
Published: June 2024

Let H be a subgroup of a group G. We say that H is c-subnormal in G if there exists a subnormal subgroup T of G such that

H
⁢
T

=
G

{HT=G}

and

H
∩
T

⩽

H
G

{H\cap T\leqslant H_{G}}

, where

H
G

{H_{G}}

is the maximal normal subgroup of G which is contained in H. In this paper, we investigate the structure of a finite group G under the assumption that all maximal subgroups are c-subnormal subgroups and present some new conditions for supersolvability.
German Idealism, Marxism, and Lukács’ Concept of Dialectical Ontology
Authors: Thompson Michael J.
Published: June 2024

I explore the roots of ontological thinking in the late thought of Georg Lukács via the development of the nature of praxis in German Idealism and the thought of Marx. I contend that the thesis of spontaneous, self-creation as well as social relatedness are both core themes in German Idealism that achieve definitive form in Marx’s thought. In effect, I argue that the human capacities for relatedness and the formation of relations with others paired with the teleological structure of human practical agency constitute a crucial ontological ground for critical theory. It is this that Lukács focuses on in his later ontological writings and which can be used to re-orient contemporary critical theory and critical philosophy which has been dominated by post-metaphysical and neo-Idealist currents in recent decades.
Influence of Repetitions-to-Failure Deadlift on Lumbo-Pelvic Coordination, With and Without Body Armor
Authors: Ramirez Vanessa J. , Bazrgari Babak , Spencer Alexander , Gao Fan , Samaan Michael A.
Published: June 2024

Ramirez, VJ, Bazrgari, B, Spencer, A, Gao, F, and Samaan, MA. Influence of repetitions-to-failure deadlift on lumbo-pelvic coordination, with and without body armor. J Strength Cond Res 38(10): 1732–1738, 2024—Repetition-to-failure (RTF) deadlift is a training modality for building lifting capacity that is often implemented by service members to maintain a minimum level of physical fitness. Despite its physiological benefits, little is known about the effects of RTF on the biomechanics of lumbar spine. Additionally, the effects of heavy deadlift training with body armor are unknown. The aim of this study was to investigate the effects of RTF deadlift on lumbo-pelvic coordination and posture, with and without body armor. Twenty-three healthy subjects, recreational powerlifters, were recruited for this study. Kinematics of the trunk and pelvis were measured using a 3D motion capture system while subjects conducted RTF deadlifts with a 68-kg low-handle hexagonal bar with and without a simulated body armor (22.68 kg). Lumbo-pelvic coordination was characterized using a vector coding approach and coupling angle variability (CAV) using circular statistics, over 3 equally divided segments of the lifting phase. More specifically, the coupling angle values were used to determine the coordination pattern between the thorax and pelvis. Trunk and pelvis ranges of motion and the amount of in-phase lumbo-pelvic coordination pattern increased with RTF deadlift. Additionally, CAV of the first and the third segments of deadlift cycle increased with RTF deadlift. Increase in variability of lumbo-pelvic coordination and peak trunk flexion (i.e., indication of increased mechanical demand of lifting on the spine), as a result of RTF deadlifting, can have deleterious soft tissue responses and contribute to an increase in risk of lower back injury.
Correlates of HIV Testing Among Asian Immigrant Female Sex Workers in New York City and Los Angeles County
Authors: Chin John J. , Forbes Nicola , Lim Sahnah , Takahashi Lois M.
Published: June 2024

This analysis examined correlates of HIV testing among Asian immigrant female sex workers in massage parlors. We interviewed 69 Chinese and Korean immigrant women who provided sexual services in massage parlors in New York City or Los Angeles County (2014–2016). Multivariable logistic regression results showed that participants who were younger, have lived in the U.S. for a longer period of time, had greater English proficiency, perceived higher HIV risk, or were living with an intimate partner were more likely to have had an HIV test. Disclosing sex work to a close friend was also positively associated with HIV testing at p < .1. These correlates may reflect differential access to information, systems, and social networks that would facilitate HIV testing, highlighting the importance of reducing social isolation and increasing HIV education, especially for older women who have come to the U.S. more recently. As the literature has indicated that Asian immigrant female sex workers experience high rates of intersectional stigma, efforts to mitigate these intersecting stigmas could further these objectives.
Synchronous Measurements of Extracellular Action Potentials and Neurochemical Activity with Carbon Fiber Electrodes in Nonhuman Primates
Authors: Amjad Usamma , Choi Jiwon , Gibson Daniel J. , Murray Raymond , Graybiel Ann M. , Schwerdt Helen N.
Published: June 2024

Measuring the dynamic relationship between neuromodulators, such as dopamine, and neuronal action potentials is imperative to understand how these fundamental modes of neural signaling interact to mediate behavior. We developed methods to measure concurrently dopamine and extracellular action potentials (i.e., spikes) in monkeys. Standard fast-scan cyclic voltammetric (FSCV) electrochemical (EChem) and electrophysiological (EPhys) recording systems are combined and used to collect spike and dopamine signals, respectively, from an array of carbon fiber (CF) sensors implanted in the monkey striatum. FSCV requires the application of small voltages at the implanted sensors to measure redox currents generated from target molecules, such as dopamine. These applied voltages create artifacts at neighboring EPhys measurement sensors which may lead to misclassification of these signals as physiological spikes. Therefore, simple automated temporal interpolation algorithms were designed to remove these artifacts and enable accurate spike extraction. We validated these methods using simulated artifacts and demonstrated an average spike recovery rate of 84.5%. We identified and discriminated cell type-specific units in the monkey striatum that were shown to correlate to specific behavioral task parameters related to reward size and eye movement direction. Synchronously recorded spike and dopamine signals displayed contrasting relations to the task variables, suggesting a complex relationship between these two modes of neural signaling. Future application of our methods will help advance our understanding of the interactions between neuromodulator signaling and neuronal activity, to elucidate more detailed mechanisms of neural circuitry and plasticity mediating behaviors in health and in disease.
Sustainable Materials in Concrete Railway Sleepers: A Review of Current Developments and Future Prospects
Authors: Yee Jia Jun , Khong Sheh Ching , Che JiaLing , Tee Kong Fah , Chin Siew Choo
Published: June 2024

Concretes have been the favoured material to make concrete railway sleepers due to better accessibility and weather compared to their timber counterparts. Railway sleepers are crucial infrastructure and 5% of concrete sleepers fail prematurely. Sleeper failure could result in catastrophic railway accidents. Hence, improvement is needed in the concrete sleeper mixes. Previous literature has identified two methods of improving concrete strength in concrete mixes with wastes, through replacement of concrete constituents or the use of alkali-activated materials. Use of wastes as partial concrete material replacements reduces the volume of concrete materials while alkali-activated material forms a concrete-like compound that eliminates the use of cement. These methods improve the strength performance and sustainability aspects of the concrete. While many studies have been conducted on these two types of sustainable concrete, their application in concrete railway sleepers has not been investigated. Thus, this paper looks to review the two different types of sustainable concretes through some previous literature that has been conducted on its application in concrete railway sleepers as well as those that have yet to be studied. Ultimately, identifying the best sustainable materials for concrete railway sleepers.
Criticism Not Always Make You Angry: The Effect of Criticism and Sensitivity to Criticism Toward Anger
Authors: Jaro'ah Siti , Deliana Sri Maryati , Martiarini Nuke
Published: June 2024

Emotion is a psychological aspect that influences people's actions and behaviors. Anger is one of the negative emotions that can arise due to various factors, including criticism. Individuals have a different threshold for criticism called sensitivity to criticism. This study aims to examine the effect of giving criticism on one's anger and the impact of sensitivity to criticism to participants’ level of anger. This research used a mixed-method approach through experimental methods, interviews, and observations. The experiment research design used was a pre-test post-test control group design. The participants involved 15 undergraduates allocated into experimental group (8 participants) and control group (7 participants). The instruments used to measure anger was the adaptation of STAXI developed by Spielberger, and the sensitivity to criticism scale was used to measure sensitivity to criticism. The results showed no effect of giving criticism on increasing anger in the experimental group. In addition, Pearson correlation results between sensitivity to criticism and anger showed no impact of sensitivity to criticism on their anger. However, the interview noticed that participants experienced anxiety, anger, and fear. Instead of not feeling anger, the subject tried to hold back the feelings of anger and had similar experiences so that the criticism given had no effect. Similar to the interview result, we observed that participants showed multiple signs of anxiety such as fiddling their fingers and toes or showing a worried look.
A Descriptive Study on Attitudes toward Seeking Professional Psychological Help among Emerging Adults in a K-pop Fan Community
Authors: Wiwit Puspitasari Dewi  , Wulan Dri Puspita
Published: June 2024

Emerging adulthood is a transition period between adolescence and adulthood, where most psychological disorders occur. Emerging adults with K-pop music preferences could also join a fan community, which brings benefits and vulnerability toward mental health because of the dynamics among fans and artists. Hence, emerging adults with mental health problems are suggested to seek a professional to get the appropriate treatment. This study aims to describe the attitude towards psychological professional help. Using the Indonesian ATSPPH-SF as the main instrument, 156 participants from a K-Pop fan community participated voluntarily. The result indicated that most participants had moderate attitudes toward seeking professional psychological help. There was no significant difference in help-seeking attitude by mental health information and visiting professional help. This study implies the importance of better education about help-seeking by introducing mental health professionals to the K-pop fan community. Future studies may consider gathering extensive data from many K-pop fan communities in Indonesia
An Approach to Qualitative Analysis in the Understanding of Cosplay and Crossplayer
Authors: Butsainah Adiba Wafa  , Luthfi Fathan Dahriyanto
Published: June 2024

The term "crossplay" is used to describe an individual who engages in role-play (costume and play) by assuming a character of a different gender than their own in the context of cosplay. This discrepancy in identity frequently gives rise to the labelling and negative perceptions of crossplayers within society. The objective of this research is to gain insight into the self-identity of crossplayers. This research employs a qualitative methodology with a phenomenological approach. The data collection techniques employed were interviews and observation. The subjects of this research were two primary sources and four secondary sources from Yogyakarta. The research employs an interactive model analysis. The findings indicate that each crossplayer has a distinct etiology and motive for engaging in crossplay. However, both groups seek to express themselves freely through crossplay, in conjunction with their closest associates. Crossplay provides a forum for resource persons to explore in order to develop their self-identity
Production Fruitghurt From Watermelon Skin With The Addition Of Dragon Fruit Extract As A Natural Colorant
Authors: Hamsina Hamsina , Sonia Sonia , Ariani Fitri , Syaiful Andi Zulfikar , Tang M. , Ridwan Ridwan , Hermawati Hermawati , Gazali Al , Abriana Andi , Anggraini Nani , Hasani Ruslan
Published: June 2024

This study aimed to determine the optimum formulation of fruitghurt from the white layer of watermelon skin with the addition of dragon fruit extract and to analyze the effect of adding dragon fruit extract to pH, lactic acid levels, vitamin C and fruitghurt acceptability from the white layer of watermelon skin. This research method consisted of 5 stages, namely making watermelon skin filtrate, making watermelon extract, making dragon fruit extract, making fruitghurt and incubation (fermentation). In this study, 4 formulations were carried out with different proportions of adding dragon fruit extract. Formula A (100 ml of watermelon skin filtrate, 15 ml of watermelon extract, 0 ml of dragon fruit extract, 11.5 grams of skim milk, 11.5 grams of sugar, 23 grams of plain yogurt), formula B (100 ml of skin filtrate, 15 ml of watermelon extract, 3.5 ml dragon fruit extract, 11.5 grams skim milk, 11.5 grams sugar, 23 grams plain yogurt), formula C (100 ml watermelon peel filtrate, 15 ml watermelon extract, 6.5 ml extract dragon fruit, 11.5 grams of skim milk, 11.5 grams of sugar, 23 grams of plain yogurt), formula D (100 ml of watermelon skin filtrate, 15 ml of watermelon extract, 9.5 ml of dragon fruit extract, 11.5 grams of milk skim, 11.5 grams of sugar, 23 grams of plain yogurt). The sample tests that have been made include the pH test, lactic acid level test, vitamin C level test, and organoleptic test. The test data were analyzed statistically by using Analysis of Variance (ANOVA) and Ducans multiple Range Test (DMRT). The results obtained were the addition of dragon fruit extract had a significantly different effect on pH, lactic acid levels, vitamin C levels, taste, aroma, color, but had no significant effect on the texture of the fruitghurt produced. The optimum formulation obtained was in treatment D with a pH value (4.57), lactic acid content (2.04%), vitamin C content (0.031%), taste test 2.72 (somewhat like), color test 4.88 (like very much), texture test 4.08 (like), and aroma test 3.48 (like)
New Thermal Insulation Materials Based on Mahogany Sawdust and Polyurethane Foam for Buildings
Authors: Hermana Gita Novian , Nadi M. Rizki Gorbyandi , Hidajatullah M. Nur , Rizal M. Nursyam
Published: June 2024

Global energy consumption has increased in the last few decades and is the third largest contributor to global energy consumption and one of the causes of increased carbon dioxide emissions. Therefore, in this study utilizing sawdust mahogany as a thermal insulation material to overcome the above problems. Sawdust material is combined with polyurethane foam to produce optimal physical, mechanical, and thermal insulation properties. From the study results it was found that the density of the thermal insulation material increased with the addition of sawdust. The value of the density is in the range of 0.041-0.052 gr/cm3. Observations using the secondary electron image (SEI) on thermal insulation materials show that the amount of sawdust added will affect the formation of an open pore cell structure which is directly proportional to the addition of sawdust. In addition, the more sawdust that is added will change the arrangement of cells and reduce the mechanical properties of the thermal insulation material. This is confirmed by the results of the hardness test which decreases with the addition of sawdust with the lowest value of 16.6 shore C for the addition of 10% sawdust. The thermal conductivity of the thermal insulation material has a value of 0.052, 0.038, 0.033, 0.032, and 0.033 W/mK for the addition of 0.2.5%, 5%, 7.5% and 10% sawdust, respectively. This shows that the thermal insulation material made in this study can be used as an alternative to thermal insulation material
Mild Nitric Acid Treatments to Produce Nitrocellulose from Kapok Fiber (Ceiba Pentandra)
Authors: Fitriannoor Fitriannoor , Wijayanti Hesti , Juwita Rinna , Nata Iryanti Fatyasari
Published: June 2024

Kapok (Ceiba pentandra) is one of the natural fibrous sources with a high content of cellulose. The natural kapok used contains 54.3% of cellulose, 11.3% of hemicellulose, and 19.11% of lignin. Kapok is a potential material to be explored by isolating the fiber, then converting into nitrocellulose. The effect of nitric acid concentration on the nitration process and characterization of material were investigated. Kapok fiber was isolated by delignification and bleaching process. Delignification was done in the presence of 5% (w/v) of NaOH and 30% (v/v) of H2O2 for alkaline and acid hydrothermal treatment, respectively. Kapok was washed until neutral pH and dried in an oven at 100 oC for 4 h to get kapok fiber (CK). For the nitration process, CK 5% (w/w) was added to a solution of 15% (v/v) phosphoric acid and variation of 15%, 20%, and 25% of nitric acid. The mixture was stirred at 10 oC, 300 rpm, for 30 min. The solid CK was separated and poured into hot water for 5 min and continuously washed with demineralized (DI) water and sodium hydrogen carbonate until neutral pH. The nitrocellulose (KN) was produced after the material dried. The smooth surface of fiber and diameter around 14.5-19.1 µm was changed into a plat fiber of 13.3-21.2 µm after hydrothermal treatment. The crystallinity index (CrI) of CK was increased up to 58.17% based on X-Ray Diffraction (XRD) observation. The degree of substitution (DS) was calculated by data spectra of Fourier Transform-Infra Red (FT-IR) analysis of a specific functional group for N-O and C-O stretching vibrations. The DS optimum value was achieved at about 0.885 at concentration of 20% nitric acid (NK20). The synthesis of nitrocellulose kapok fiber-based has potential as a functional material.
Isothermal Adsorption of Used Cooking Oil Purification Using Avocado Seed Adsorbent
Authors: Harianingsih Harianingsih , Dyah Pita Rengga Wara , Rihadatul 'Aisy Qothrun Nada Athiya , Ria Ramadhani Rizki , Syauqi Alifyan , Wulandari Retno
Published: June 2024

High consumption of cooking oil has an impact on the availability of used cooking oil. Used cooking oil can cause pollution if the processing is not sound. So we need an alternative as a solution for handling cooking oil waste. Adsorption using avocado seed adsorbent is the choice because the morphological structure and other characteristics meet the specifications for the adsorption of used cooking oil. This study aimed to determine the acid number, viscosity, density and isothermal adsorption from avocado seeds as an adsorbent in used cooking oil. The method used was by varying the adsorbent doses of 100, 200 and 300 mg    L-1 with contact times of 30, 60, 90, 120 and 150 minutes. Adsorption was carried out at a temperature of 70oC and a stirring speed of 200 rpm. The results obtained for the acid numbers at various adsorbent doses at 150 minutes reached 6.22, 4.98 and 3.12 mg KOH      g-1. Viscosity at different adsorbents reached 54.2, 46.23 and 45.44 mm2 s-1, while the density reached 898.92, 897.17 and 896.55 kg m-3. Langmuir isothermal adsorption obtained R2 value in the equation reached 0.9365 and Freundlich reached 0.9496, so the Freundlich equation model is more recommended for use in the adsorption process because the regression value is close to 1.
The Effects of Raw Material Ratio and Calorific Value on Gasification Rate from Co-Gasification of Coal and Biomass (Bagasse)
Authors: Kurniansyah Muhammad Harry , Hasan Abu , Syari Aida
Published: June 2024

To reduce greenhouse gas pollution by 29% in 2030 and actively fight climate change, Indonesia uses biomass as an alternative energy which can be combined with coal. Bagasse is a relatively abundant biomass that has not been effectively utilized. Bagasse can be used as a more effective alternative energy source if it is processed with co-gasification, which is the conversion of solid fuel into gas from two different fuel materials at the same time to produce syngas. The characteristics of biomass and coal co-gasification are closely linked to reactor type and gasification parameters such as temperature, gasifying agent, and mass ratio. The composition of the produced syngas changes depending on the calorific value of the coal used and the raw material ratio. The amount of syngas produced rises in direct proportion to the amount of biomass, and the quantity of air supplied causes complete combustion, so the syngas content decreases. The impact of the calorific value of the coal used, as well as variations in the ratio of the composition of coal and bagasse, on the supply of oxygen in downdraft type gasification equipment is investigated in this study. Bagasse characteristics identified by proximate and ultimate analysis indicate that this biomass can be used as an alternative source of renewable energy. The co-gasification process with 100% coal raw material has the highest temperature and the longest time; the co-gasification process with 100% sugarcane bagasse raw material has the lowest temperature and the shortest time; and the duration of the flame produced in syngas ranges from 5-6 minutes. The 25% bagasse and 75% coal ratio provided the fastest high temperature in this testing, making it more efficient. The calorific value of coal and biomass determines combustion efficiency, with 5300 cal/gr coal producing heat that lasts longer than 3800 cal/gr and 4500 cal/gr.
Kinetic Study of Non-Isothermal Reactions on the Pyrolysis of Various Biomass Waste by using Thermogravimetric Data
Authors: Prasetiawan Haniif , Fardhyanti Dewi Selvia , Fatriasari Widya , Hadiyanto Hadiyanto
Published: June 2024

Population growth causes an increase in the need for petroleum. However, petroleum as primary energy is currently increasingly limited in availability. Required alternative energy sources that can be renewed to overcome these problems, one of which is bio-oil. Bio-oil is produced by a pyrolysis process using biomass such as sugarcane bagasse, rice husk, and empty oil palm fruit bunches (EFB), by heating in the absence of oxygen. Kinetic studies on pyrolysis of this type of biomass (sugar cane bagasse, rice husk, and empty oil palm fruit bunches) were carried out using the thermogravimetric method. The Coats-Redfern method was used in this study. The purpose of this study is to obtain the most appropriate reaction kinetics model to represent the pyrolysis process for each type of biomass. In addition, to determine the optimal temperature used in forming bio-oil. Approximately 5 g of each biomass is used with a heating rate of 10°C/minute. Pyrolysis was carried out until the temperature reached 750°C. The results of the research on the selected kinetic model for each biomass is a geometric model with a correlation coefficient (R2) close to 1 and the optimum temperature for producing bio-oil is around 550 - 600°C.
Evaluating the Potential of Refuse Derived Fuel (RDF) in Cement Production: a Comparative Analysis of RDF Variations In Indonesia's Emplacement Pluit, Jakarta
Authors: Sari Mega Mutiara , Inoue Takanobu , Septiariva Iva Yenis , Yokota Kuriko , Notodarmodjo Suprihanto Mediawan , Kato Shigeru , Suhardono Sapta Cahya , Al Ghifari Rizal Muhammad , Suryawan I Wayan Koko
Published: June 2024

This study critically evaluated the potential of Refuse Derived Fuel (RDF) as a sustainable substitute for coal in the cement manufacturing process. Using Emplacement Pluit's waste as a primary source, three distinct RDF variations were analyzed: RDF A (comprised purely of PET Charcoal), RDF B (a 50-50 combination of PET Charcoal and organic waste), and RDF C (solely organic waste). Among the parameters evaluated were moisture content, ash content, and calorific value. The results indicated RDF A's superior quality, with a moisture content of 2.6%, ash content of 0.7%, and a calorific value of 25.1 MJ/kg. In stark contrast, RDF C exhibited a high waste reduction potential at 80.5%, but its calorific value fell short of Korean standards. RDF B, balancing quality and reduction potential, achieved a 98.9% waste reduction and met Korean RDF standards, making it the most viable alternative to coal in cement production. The study underscores the significant potential of integrating RDF in industrial practices, particularly cement kilns. It offers insight into optimizing waste management strategies in line with the 'zero-waste' vision.
Surface Evaluation of Tricalcium Phosphate Bioceramic Coating on SS-316L by Electrophoretic Deposition
Authors: Hermana Gita Novian , Nugraha Dhion Khairul , Nadi Muhammad Rizki Gorbyandi , Sektiono Moch. Wisnu Arif , Mayello Randy Mediawan , Farhan Miftah , Kusuma Nirmala Cahya , Alfayed Naufal Alden , Rizqi Fauzi Muhamad
Published: June 2024

The development of orthopedic implant materials has become an important topic of discussion lately. The SS-316L alloy is widely used as an implant material due to its relatively low cost, corrosion resistance, and ease of production. However, metal alloys, especially SS-316L, are prone to ion release into the blood over time. Therefore, TCP or tricalcium phosphate [Ca3(PO4)2] is needed to coat the surface of SS-316L, preventing ion release into the blood and enhancing the biocompatibility of the implant material. In this study, TCP coating was applied to the SS-316L substrate using the electrophoretic deposition technique. The influence of deposition time on changes in microstructure and mechanical properties is the main focus of this study. The results of the coating technique indicate that the deposition yield increases with the deposition time. Morphological testing results show that increasing deposition time improves coating quality by increasing the thickness of the coating layer and preventing layer peeling. The coating process also reveals the accumulation of layers in certain areas and the formation of thin layers in other regions. A deposition time of 30 minutes results in a coating thickness ranging from 48.7 to 57.9 µm. Hardness testing, conducted with indentation loads of 50, 100, and 300 gf, indicates that longer deposition times and higher indentation loads during hardness testing result in reduced material hardness.
Application of Cellulose Acetate Propionate Biopolymer Membrane in The Treatment of Textile Wastewater Containing Remazol Dye
Authors: Amilia Amilia , Maryudi Maryudi , Rahayu Aster , Hakika Dhias Cahya , Suradi Siti Samahani
Published: June 2024

Textile liquid waste is pollution resulted from textile industry activities that often produce hazardous and toxic materials. Therefore, appropriate processing techniques are needed. There are many processing methods that can be used in treating this textile liquid waste, one of which is using membrane technology with phase inversion techniques. Membrane technology has advantages over other processing methods such as, being biopolymeric, relatively lower energy consumption, does not use chemicals in the processing process, and does not cause new waste in the processing process.  In this study, 3 variations of cellulose acetate propionate (CAP) concentration were carried out in the manufacture of membranes including, 13% CAP; 14% CAP; and 15% CAP. Membranes that have been made are then carried out several analyses, namely porosity analysis; flux analysis; rejection analysis; and color concentration reduction analysis. The results in this study found that the highest porosity value, rejection value and flux value were found in the CAP membrane with a concentration of 13%.  The CAP membrane has the best rejection value on reducing the remazol concentration of 43% with a membrane of 13% CAP.
Formulation and Evaluation of Face Moisturizing Cream from Katuk Leaf Extract (Sauropus Androgynus Merr)
Authors: Siallagan Johnson , Kano Christina Paulina , Yabansabra Yuliana Ruth , Pramesti Santinia Andiva , Fitriyana Deni Fajar , Siregar Januar Parlaungan , Cionita Tezara , Guterres Natalino Fonseca Da Silva
Published: June 2024

The Katuk plant (Sauropus androgynus L. Merr) is a natural substance with proven efficacy in treating diabetes, obesity, and inflammation. It also possesses antioxidant, lactation-inducing, and antibacterial properties. This study aimed to investigate the impact of varying concentrations of katuk leaf extract on characteristics of the moisturizer cream produced. The study involved extracting katuk leaves using the maceration method for 24 hours, utilizing ethanol as the solvent. The extraction process resulted in a yield of 1.86%. The final yield contains alkaloid chemicals, flavonoids, terpenoids, saponins, and tannins. The formulations employed in this investigation utilized the codes F0, F1, F2, and F3, representing the content of katuk leaf extract at 0%, 2%, 4%, and 6%, respectively. The cream generated exhibited an identifiable aroma of katuk and had a hue ranging from light green to blackish brown, as determined by organoleptic testing. The pH values of specimens F0, F1, F2, and F3 were 7, 7, 7, and 8, respectively. The spread ability measurements for specimens F0, F1, F2, and F3 were 5.3 cm, 5.5 cm, 6 cm, and 6.1 cm, respectively. According to the findings of this investigation, specimens F0, F1, F2, and F3 adhered for 5 seconds, 4 seconds, 4 seconds, and 5 seconds, respectively. The formulation F2 is the most superior product generated in this investigation. This is because this specimen exhibits the highest level of respondent satisfaction compared to the other specimens. This formulation exhibits antioxidant activity with a per cent inhibition of 30.51% and an IC50 value of 84.63 ppm. The face moisturizing cream derived from katuk leaf extract possesses a high antioxidant potency, placing it in the active/strong category.
Oil price fluctuations and airline profitability: The case of Turkish Airlines
Authors: Gelirli Nalan , Kısacık Sina
Published: June 2024

This study examines the potential relationship between oil price fluctuations and airline profitability, focusing on Turkish Airlines (THY) from 2001 to 2022. The study uses wavelet analysis to explore the correlation between oil prices and the airline's profit and loss data, considering geopolitical factors and unexpected events that may affect airline operations. THY's financial performance is significantly impacted by oil price fluctuations in the short and medium term, while its long-term profitability remains stable. Strategic planning and intelligent fuel management, including hedging, are imperative to mitigate the effects of volatile oil prices on airline operations. The results of this study provide valuable insights for the airline industry, assisting in better-informed decision-making and contributing to future research. Wavelet analysis proves effective in uncovering complex relationships and trends, offering a comprehensive understanding of the dynamic interactions between oil price changes and airline profitability.
Ecological status of three Angiosperms (Alysicarpus bupleurifolius var. hybridus DC, Hibiscus hoshiarpurensis and Ceropegia bulbosa Roxb. var lushii) in Punjab (India)
Authors: K Dhami Kirandeep
Published: June 2024

Around the world, several plant species are fighting for their survival in the new urbanized world to which they are not adapted to and these species face a significant risk of extinction in the near future. Such species are categorized as “threatened species” in the IUCN redlist. In India, there are several herbaceous plant species that are getting pushed to those zones of existence and the scenario is no different in the northwestern state of Punjab where changes in the land cover use has been challenging the survival of several plant species including a few natives. This article focuses on existing knowledge base on the three angiosperm species in Punjab, Alysicarpus bupleurifolius var. hybridus DC and Hibiscus hoshiarpurensis and Ceropegia bulbosa Roxb. var lushii, that have been identified by Punjab Biodiversity Board as threatened in the state. It is important to understand here that comprehensive information on geographic distribution, ecology and threats to these species is lacking on global databases and even the threat status is apparently ambiguous. Alysicarpus bupleurifolius var. hybridus DC, which has been identified as endemic herb in the state, is listed as endangered species by Punjab Biodiversity Board, however the variety itself has not yet found its place in the IUCN redlist. The species, Alysicarpus bupleurifolius, is listed as the Least Concern species in the IUCN red list. Similarly, the global IUCN status of Hibiscus hoshiarpurensis, another herb identified as endemic to the state, is not known however the species is listed as threatened by the Punjab Biodiversity Board. According to The Plant list (database maintained by The Royal Botanic Gardens, Kew and Missouri Botanical Garden), the plant species status is still unresolved. Ceropegia bulbosa Roxb. Var lushii, that has a distribution in a few states of India, has been identified as threatened on regional scale however the species has not yet been assessed for the IUCN Redlist.
What’s the state with birds in video games? A short summary
Authors: Verdier Florian
Published: June 2024

During the last fifty years, a lot modifications occurs on the process to make video games. They evolved through technology, comprehension of game mechanic and adaptation to the market. But it’s also the case for some minor elements like birds. Just enemies or simple animals to portray a zone, they become today more diverse and central to the game worlds or mechanics. Here some glimpses about that evolution.
The effects of 12-week training between 12-15 years old athlete on physical parameters
Authors: Tinazci Cevdet , Guneralp Huseyin
Published: June 2024

Sports are the best way to improve individuals in terms of physic, emotion and society, to achieve cooperation and team spirit and to gain individual to the society. This study aims to determine the importance of sports on social skills and sport orientation, also to determine the effects of 12weeks training on some physical parameters of football players, who didn't have any obstacles in terms of health. A total of 81 subjects (12-15years old) participated in the study. In order to determine some physical, social skills and sport orientation characteristics of sports and non-sports children, flexibility test, push-up test, shuttle test, stop the long jump test, vertical jump test, flamingo balance test and augmentation test, 10,20,30m sprint and ball speed tests, 20m shuttle run test was used. Statistically significant differences were found in all tests except the gain orientation and target orientation, which are the sub-dimensions of body weight test and fitness orientation inventory (p<0.05). As a result, it was observed that the 12-week exercise applied to the children who are actively involved in sports had a positive increase in the physiological and physical parameters. It has been observed that sports provide positive improvements in social skills and sport orientation levels of children.
Yoga as a school health service for adolescents suffering from primary dysmenorrhea
Authors: Giannakopoulou Aikaterini
Published: June 2024

Primary dysmenorrhea is a common pain issue among girls in adolescence and it is characterized by the fact that is not associated with other pathological conditions. Among professionals that work in adolescent sexual and reproductive healthcare, dysmenorrhea is considered to be a periodic pain issue that can be temporarily treated by medicine, but the recurrence of the pain and the monthly discomfort have a larger impact on the lives of the adolescent girls. The voices of adolescents that reflect the need for alternative solutions as complementary therapy become more intense. Yoga as a complementary therapy can educate and contribute to the management of menstrual pain and provide a better quality of life. This article provides information about the recent research on interventions of yogic science in schools, to enhance adolescent reproductive health and help them overcome menstrual pain. It highlights the importance of using a wider spectrum of yogic tools and discusses their application to the school context, resulting in a positive effect on treating primary dysmenorrhea.
Entre Outros Metáforas para Tempos Difíceis
Authors: de Oliveira Farias Vanderlei
Published: June 2024

Este livro analisa os dilemas mais atuais de nossa convivência social, de nossa vida pública. A partir de uma interlocução entre filosofia, psicologia e literatura, o texto discute temas como: radicalização política, bolhas sociais, discursos de ódio, fake news, o papel da participação social, do diálogo e dos conceitos de identidade e diferença. Utilizando metáforas e narrativas, o livro instiga o leitor a pensar sobre sua condição de ser social, sobre como elabora suas interações sociais. O texto convida a construir diálogos, produzir debates e a examinar constantemente o conteúdo das narrativas. A qualidade da vida em comunidade se manifesta na forma como um grupo social escolhe conviver, na maturidade dos seus acordos e desacordos.
Marcellinus comes Krónikájának sztyeppei népekkel kapcsolatos szöveghelyei
Authors: Sólyom Márk
Published: June 2024

Az Illyricumból származó, katolikus keresztény vallású Marcellinus comes Iustinianus császár (527– 565) cancellariusa és a VI. század elejének egyik legjelentősebb történetírója volt. Az udvari szerző latin nyelvű Krónikája (Chronicon) Hieronymus (Szent Jeromos) 379-ig eljutó krónikakompozíciójának az 534-ig megírt folytatása, amelyet egy ismeretlen auktor később egészen 548-ig kibővített. A mű a késő ókori sztyeppei népek történetének is fontos, megkerülhetetlen forrása. A publikáció az alánokról, hunokról, bolgárokról és szabirokról szóló Marcellinus comes szöveghelyek fordítására és részletes kommentálására vállalkozik.
The ecosystem services of the elements of the fortress landscape in Warsaw Fortress in the context of a contemporary city.
Authors: Jastrzębska Justyna , Zaraś Ewa , Botwina Jakub
Published: June 2024

Współcześnie elementy krajobrazu fortecznego w mieście mogą stanowić niezwykle ważną składową krajobrazu kulturowego, systemu zielonej infrastruktury oraz systemu przyrodniczego miasta [SPM]. Ze względu na swoją specyfikę w organizacji przestrzeni ich rola w strukturach miasta wiąże się ze świadczeniem usług ekosystemowych we wszystkich aspektach. Niestety bardzo często elementy krajobrazu fortecznego ulegają zniszczeniu wskutek nieodpowiednio dobranego sposobu użytkowania. Prezentowany artykuł dotyczy analizy funkcjonowania obiektów fortecznych w aspekcie usług ekosystemowych, z głównym naciskiem na funkcjonowanie w systemie przyrodniczym miasta oraz pełnienie roli turystycznej wybranego obiektu, jakim jest Twierdza Warszawa. Tłem dla analiz twierdzy Warszawa są obiekty powstałe w podobnym przedziale czasowym w Europie. W sumie przeanalizowano 34 obiekty. Dokonano analizy wspomnianych obiektów pod kątem świadczeń ekosystemowych. Do tej oceny stworzono autorski system porównania, oparty na bonitacji punktowej. W dalszej części scharakteryzowano pod kątem historycznym, przestrzennym, przyrodniczym i ekosystemowym przedmiot opracowania – Twierdzę Warszawa. Zastosowano badania sondażowe, dotyczące odbioru obiektów fortecznych oraz ich wykorzystania. W podsumowaniu położono nacisk na wysoką wartość kulturową, przyrodniczą i ekosystemową takich obiektów, a co za tym idzie konieczność ich ochrony i odpowiedniego doboru sposobu użytkowania.
Carrying the Cross of Discord
Authors: Mammarella Massimo
Published: June 2024

This article investigates the traditional procession of the cross of Vladimir of Dioclea, known as Jovan Vladimir among the Serbians. The ritual is annually held on Trinity Day in June near the city of Bar in Montenegro. Vladimir ruled over the Principality of Dioclea at the beginning of the eleventh century and is venerated as the first Serbian as well as the first Montenegrin saint. Orthodox pilgrims had been carrying the cross up to Mount Rumija for centuries alongside the Catholic and Muslim communities of southern coastal Montenegro, where the saint’s relic has been equally respected by all confessions. After being discouraged by socialist Jugoslav authorities, the ritual was fully restored in the 1990s. However, in 2005 a metal church was erected on the peak of the mountain by the Serbian Orthodox Church, recalling the myth of an old church demolished by the Ottomans in the sixteenth century. This unilateral action induced the other groups to give up the ritual. The dispute over the legitimacy of the metal church in Rumija reveals forms of conflict, negotiation and interaction that redefine the inter-religious and political landscape of Montenegro. Based on fieldwork conducted in 2022 and in 2023, this article pays specific attention to the nationalistic discourse pervading the cult, the myth, and the ritual of Saint Vladimir. It reflects on the attitude of both Serbian Orthodox clerics and believers towards this important procession, but also the volatile degree of inter-religious (in)tolerance.
Saul M. Olyan, Animal Rights and the Hebrew Bible
Authors: Stone Ken
Published: June 2024

Saul M. Olyan, Animal Rights and the Hebrew Bible (New York and Oxford: Oxford University Press, 2023), 156 pp., $83.00 (cloth), ISBN: 0197609385.
Denise Lombardi, Le néo-chamanisme. Une religion qui monte
Authors: Mossière Géraldine
Published: June 2024

Denise Lombardi, Le néo-chamanisme. Une religion qui monte (Paris: Éditions du Cerf, 2023), 216 pp., $ 21 (pbk), ISBN: 9782204153966.
How to construct the most stable structure of (110) surface from rutile TiO2 bulk?
Authors: Tran Thi Thoa  , Nguyen Trong Nghia  , Hoang Van Hung  , Hue Nguyen Thi Minh
Published: June 2024

XRD pattern of rutile TiO2 bulk and surface energy of possible terminated (110) planes were investigated using the DFT+U method. The (110) surface was demonstrated to be the most popular facet of rutile TiO2, which is in good agreement with data of the JCPDS card No. 21-1276. The difference in surface energy among possible terminated (110) planes is attributed to structure of top and bottom atomic layers. We have found that the P5 plane is the most stable. It represents structure of (110) surface. Rutile TiO2 (110) surface has calculated surface energy of 0.98 J/m2. The value compares well with previous publications. Besides, DFT calculations were also performed. In comparison with DFT+U, surface energy obtained from DFT calculation for (110) surface is very small, about 0.48 J/m2.