bluuebunny/crossref_metadata_2025 huggingface dataset:
Specific topics, specific symptoms: linking the content of recurrent involuntary memories to mental health using computational text analysis
Authors: Yeung Ryan C. , Fernandes Myra A.
Published: December 2023

Researchers debate whether recurrent involuntary autobiographical memories (IAMs; memories of one’s personal past retrieved unintentionally and repetitively) are pathological or ordinary. While some argue that these memories contribute to clinical disorders, recurrent IAMs are also common in everyday life. Here, we examined how the content of recurrent IAMs might distinguish between those that are maladaptive (related to worse mental health) versus benign (unrelated to mental health). Over two years, 6187 undergraduates completed online surveys about recurrent IAMs; those who experienced recurrent IAMs within the past year were asked to describe their memories, resulting in 3624 text descriptions. Using a previously validated computational approach (structural topic modeling), we identified coherent topics (e.g., “Conversations”, “Experiences with family members”) in recurrent IAMs. Specific topics (e.g., “Negative past relationships”, “Abuse and trauma”) were uniquely related to symptoms of mental health disorders (e.g., depression, PTSD), above and beyond the self-reported valence of these memories. Importantly, we also found that content in recurrent IAMs was distinct across symptom types (e.g., “Communication and miscommunication” was related to social anxiety, but not symptoms of other disorders), suggesting that while negative recurrent IAMs are transdiagnostic, their content remains unique across different types of mental health concerns. Our work shows that topics in recurrent IAMs—and their links to mental health—are identifiable, distinguishable, and quantifiable.
Emotional event perception is related to lexical complexity and emotion knowledge
Authors: Li Zhimeng , Lu Hanxiao , Liu Di , Yu Alessandra N. C. , Gendron Maria
Published: December 2023

Inferring emotion is a critical skill that supports social functioning. Emotion inferences are typically studied in simplistic paradigms by asking people to categorize isolated and static cues like frowning faces. Yet emotions are complex events that unfold over time. Here, across three samples (Study 1 N = 222; Study 2 N = 261; Study 3 N = 101), we present the Emotion Segmentation Paradigm to examine inferences about complex emotional events by extending cognitive paradigms examining event perception. Participants were asked to indicate when there were changes in the emotions of target individuals within continuous streams of activity in narrative film (Study 1) and documentary clips (Study 2, preregistered, and Study 3 test-retest sample). This Emotion Segmentation Paradigm revealed robust and reliable individual differences across multiple metrics. We also tested the constructionist prediction that emotion labels constrain emotion inference, which is traditionally studied by introducing emotion labels. We demonstrate that individual differences in active emotion vocabulary (i.e., readily accessible emotion words) correlate with emotion segmentation performance.
Genotoxic Risk of Solar Ultraviolet Radiation in Amphibians
Authors: Eduardo Lago Londero James , Passaglia Schuch André
Published: December 2023

About 41% of the amphibian species are threatened with extinction, according to the International Union for Conservation of Nature Red List. One important environmental factor commonly associated with the amphibian decline phenomenon is solar ultraviolet (UV) radiation due to its genotoxicity. Other stressors present in the environment may potentiate the UV-induced effects on amphibians. In this way, this is an emergent topic in the research fields of ecotoxicology and conservation. In this chapter, we summarize the state-of-the-art knowledge about the genotoxic risk of solar UV radiation for amphibian species and its potential implications for the population decline phenomenon. We discuss the relevance of UV radiation for amphibians in a changing environment, describe UV-induced DNA lesions and their lethal and sublethal consequences for amphibians, and explore amphibian strategies to avoid and deal with UV damage, such as behavioural changes and activation of DNA repair mechanisms. Finally, we discuss the link between the genotoxicity triggered by solar UV exposure and the amphibian decline and ecology.
Controversies in Hair Analysis… or 30 Years of Challenges and Issues
Authors: Kintz Pascal
Published: December 2023

Testing for drugs is important for most clinical and forensic toxicological situations, both for assessing the reality of the exposure/intoxication and for evaluation of the level of drug circulating in the body over a determined period of time. The presence of a drug analyte in a biological specimen can be used to document exposure. In recent years, remarkable advances in sensitive analytical techniques have enabled the analysis of drugs in unconventional biological specimens such as hair. Despite late sampling or even lack of collection of traditional biological fluids, such as blood and/or urine, results for hair testing allow exposure to a drug to be documented. Although there are still controversies on how to interpret the results, particularly concerning children, pure analytical work has reached a plateau, having solved almost all the analytical problems. With respect to hair preparation, only evaluating the pros and cons about the use of pulverized hair versus cut hair and the use of single hair versus a whole strand of hair remains. The aim of this chapter is to discuss issues and controversies, focusing on major recent improvements in new applications, including screening of alcohol addicts, differences between the hair of children and adults, the use of hair to document a single exposure, such as in drug-facilitated crime, the place of hair in doping control in sport, particularly in cases of contamination, and, of course, the oldest challenge in hair testing, i.e., external contamination.
Computational Approach
Authors: Iuchi Satoru , Sato Hirofumi
Published: December 2023

Computer technology has rapidly developed recently, and the importance of computational approaches is increasingly being recognised. We can quickly obtain numerical results using computers, but, at the same time, it is also true that we may easily misunderstand them unless we correctly understand theoretical foundations. Computational methods for coordination complexes in the solution phase are outlined, including quantum chemistry, statistical mechanics, and molecular simulations.
Solvent Structures
Authors: Yamaguchi Toshio
Published: December 2023

Various physicochemical properties of solvents are closely connected with their microscopic structures. X-ray and neutron scattering techniques provide direct structural information, such as the interatomic distance and coordination number, of solvents. Furthermore, an empirical potential structure refinement (EPSR) modelling combined with the X-ray and neutron scattering data enables extraction of the three-dimensional structure of solvents. This chapter describes the structures of classical solvents and recently developed supercritical fluids, ionic liquids, and deep eutectic solvents determined by X-ray and neutron scattering and EPSR at a molecular level.
A novel electrochemical sensing method based on an amino-functionalized MXene for the rapid and selective detection of Hg2+
Authors: Liu Jinquan , Shi Jiao , Zhong Miao , Wang Yating , Zhang Xinxin , Wang Wenyu , Chen Zhijun , Tan Yan , Xu Dongyun , Yang Shengyuan , Li Le
Published: December 2023

A cost-effective and easy-to-operate electrochemical sensing method was successfully developed based on an amino-functionalized titanium-based MXene (NH2–Ti3C2Tx) for the rapid and selective detection of Hg2+.
Effect of substituents on the 1O2 production and biological activity of (N^N^N)Pt(py) complexes
Authors: Romo-Islas Guillermo , Gil-Moles María , Saxena Arnav , Frontera Antonio , Gimeno M. Concepción , Rodríguez Laura
Published: December 2023

Pt(ii) complexes with different degrees of fluorination at a pyridine ligand have been investigated as photosensitizers using the structural modifications of a series of tridentate N⁁N⁁N ligands. The compounds were evaluated as potential chemotherapeutic agents against A549 cell lines.
Exopolysaccharide β-(2,6)-levan-type fructans have a molecular-weight-dependent modulatory effect on Toll-like receptor signalling
Authors: Akkerman Renate , Oerlemans Marjolein M. P. , Ferrari Michela , Fernández-Lainez Cynthia , de Haan Bart J. , Faas Marijke M. , Walvoort Marthe T. C. , de Vos Paul
Published: December 2023

Fructans are a group of dietary fibers which are known to have many beneficial effects including immune-modulating effects.
Thermal catalytic mineralization of ortho-dichlorobenzene at low temperature: an in situ FT-IR and XPS mechanistic investigation
Authors: Kumar Adarsh , Tyagi Deepak , Varma Salil , Chand Hushan , Krishnan V. , Bhattacharyya K. , Tyagi A. K.
Published: December 2023

The VWC-catalyst thermally mineralizes o-DCB [a surrogate moiety representing dioxin and furan] at 120 °C for the first time in oxidative and non-oxidative condition with strong effect of lattice oxygen establishing its reaction mechanism.
Photoredox radical cyclization reaction of o-vinylaryl isocyanides with acyl chlorides to access 2,4-disubstituted quinolines
Authors: Huang Peng-Fei , Fu Jia-Le , Huang Jia-Jing , Xiong Bi-Quan , Tang Ke-Wen , Liu Yu
Published: December 2023

A photoredox radical cascade cyclization reaction for the effective construction of 2,4-disubstituted quinolines at room temperature is described. It shows good substrate suitability and functional group compatibility.
Structural and optical properties of methylhydrazinium lead bromide perovskites under pressure
Authors: Szafrański Marek
Published: December 2023

Pb–NH2 coordinate bonds contribute to the strong distortions of the inorganic frameworks of methylhydrazinium led bromide perovskites, which translate into massive changes in their optical properties under hydrostatic pressure.
Enhancing optical properties through zinc halide precursor selection: interfacial optimization of InZnP quantum dots
Authors: Huang Chien-Chi , Chung Shu-Ru , Wang Kuan-Wen
Published: December 2023

QDs with a core structure synthesized using highly reactive zinc chloride, exhibited increased Zn–O bonds, effectively reducing the inherent surface defects in InP, minimizing the lattice mismatch, and enhancing the QY of InZnP/ZnS QDs.
Environmental Science – Advances: reflections and welcome to another year of the journal
Authors: Jones Kevin C. , Cai Zongwei , Manaia Célia M.
Published: December 2023

Editors-in-Chief Kevin Jones, Zongwei Cai and Célia M. Manaia reflect on the second year of Environmental Science: Advances.
Impact of lignin–carbohydrate complex (LCC) linkages on cellulose pyrolysis chemistry
Authors: Padmanathan Arul Mozhi Devan , Beck Seth , Ansari Khursheed B. , Mushrif Samir H.
Published: December 2023

The prevalence of covalent lignin–carbohydrate complex (LCC) bonds likely foster inter-moiety reaction pathways, marked by significant kinetic and thermochemical barriers in the intra-moiety cellulose decomposition within LCC.
The mitigating responses of confucian religious institutions to the COVID-19 pandemic in Indonesia
Authors: Lakonawa Petrus , Kristan  , Meneses Kristine , Hepi Witono Petrus , Jodis Jessica , Mangatur Tampubolon Simon , Siallagan Jamson
Published: December 2023

The COVID-19 pandemic, which causes global catastrophes, has called for urgent responses from global communities, including religious communities around the globe, to adjust and find effective solutions to overcome the threatening dangers of the Corona virus. In relation to that phenomenon, this article investigates the responses of Confucian religious institutions in Indonesia to the COVID-19 pandemic. It focuses on Confucian theological perspectives, institutional policies, and concrete actions taken during the pandemic. The study employs a comprehensive research approach, combining qualitative and documentary analysis, field observations, interviews, and discussions with religious leaders and their community members. The research reveals that Confucianism values wisdom, compassion, and courage during the pandemic, seeing it as a chance for personal and spiritual growth. Confucian religious institutions implemented health protocols in their religious rituals and actively helped affected communities by distributing sanitizers, offering psychological support, and organizing vaccination drives. This research underscores the vital role of religion in educating, supporting, and assisting people in overcoming pandemic challenges. It will begin by introducing the COVID-19 pandemic briefly, then delve into the theological responses of Confucianism to the pandemic and subsequently explore how Confucian institutions adapted their religious rituals and helped the people overcome the COVID-19 pandemic.
The effect of channel geometry and check dam location on sediment transport discharge in the Kuranji River
Authors: Daoed Darwizal , Wila Zarinda Septi , Budi Irawan Bayu
Published: December 2023

Rivers as infrastructure carry water from upstream to downstream to meet the water needs of communities along the river and as drainage. Therefore, it is necessary to maintain the stability of the river from erosion and sedimentation. Changes in river geometry are mostly caused by the high intensity of rainfall in the upstream section. This causes the geometry to change easily, many bends are found, river embankments collapse, and the slope and flow of the river change suddenly. As a result, water will wash away sediment from upstream to downstream with high sediment discharge. However, the sediment rate/discharge can be reduced by building a check dam, but it needs the right location so that the construction of the check dam is effective and the river flow is stable. Research using HEC-RAS has been carried out at the location of the middle section of the Kuranji River, where simulating three check dam locations shows that the reduction in sediment discharge is very effective, but other places are still the same as without the check dam. Therefore, it is recommended to build check dam series and groundsills at narrowing locations and strengthen river banks at Sta. 16 to Sta. 32.
Wireless Sensor Network (WSN) of a flood monitoring system based on the Internet of Things (IoT)
Authors: Rachmawardani Agustina , Hernandi Virgianto Rista , Giarno  , Prabowo Djoko , Nardi  , Widiatmoko Wastumirad Adi , Firyal Rasya Muhammad , Majdi Ash-Shiddiqyi Khaerul
Published: December 2023

Indonesia records exceptionally high rainfall, particularly during the rainy season when almost all areas of the country are consistently showered with heavy rain. Vigilance is therefore crucial due to the risk of flooding from overflowing rivers or dams. It is essential to develop flood monitoring systems to mitigate the risk and impact of flooding. This study aimed to design and build a flood monitoring system with parameters that support flood warnings. These include measurement of the water level using an ultrasonic sensor and rainfall using a tipping bucket-based hall sensor. The flood detection system was installed at Pondok Aren, Tangerang Selatan, Banten. A website was developed to display information on water levels and rainfall measurements every 10 minutes, as well as cumulative rainfall over 24 hours, presented in values, tables, and graphs. The device design included a warning feature in the form of a strobe light that would activate if the water level exceeded the minimum threshold in addition to providing rainfall status notifications. The system performed well in trials, with data transmitted to the database every 10 minutes. Raingauge sensors exhibited a 0.86% error rate, while the ultrasonic sensor showed an average error rate of just 0.25%.
Seismic microzonation based on HVSR inversion results for shear wave (Vs30) mapping and soil vulnerability in West Sulawesi and South Sulawesi Regions
Authors: Baharuddin Faris Zuhair Mohammad , Kurniawan Suhardja Sandy , Pranata Bayu , Prayitno Adi Suko
Published: December 2023

The Horizontal to Vertical Spectral Ratio (HVSR) is a seismic analysis method used to obtain information about subsurface geological characteristics. This method is based on the spectral ratio analysis between the horizontal and vertical components of earthquakes or other vibration sources. HVSR has proven to be an effective tool in evaluating rock layers, layer thickness, rock hardness, and geological hazard potential. In the HVSR method, seismic data are measured using three-component seismometers, the N-S (North-South), E-W (East-West), and vertical components. In this study, the HVSR method is used for Vs30 inversion to estimate shear wave velocity at a depth of 30m. The southern and western regions of Sulawesi have various geological conditions and high seismicity levels. The results of this inversion can be used for mapping soil vulnerability indices. The obtained soil vulnerability index values indicate high vulnerability near the Palu-Koro fault, with A0 9.27 at F0 3.2 Hz. This method can also estimate shear wave velocity values at a depth of 30 m. Vs30 values range from 200 m/s to 500 m/s at various measurement points, indicating variability. According to the SNI 1726:2012 and NEHRP classifications, the research area has soil conditions ranging from medium to soft.
The Mount Anak Krakatau landslide scenario for tsunami modeling in Banten
Authors: Pribadi Sugeng , Luqman Hakim Muhammad , Fauzi  , Kurniawan Telly , Andi Nugraha Hanif , Daryono  , Karnawati Dwikorita , Prayitno Adi Suko
Published: December 2023

The eruption of Mount Anak Krakatau occurred on December 22, 2018, in the Sunda Straits, Indonesia, causing a tsunami that affected the coastal area of Banten Province. We use COMCOT 1.7 to make a tsunami model based on flank collapse caused by a landslide tsunami. The aim of study is to remodel past events to anticipate the mechanism and impact of the damage in the future. Bathymetry and topography are integrated to become high resolution data with a grid area of 49.8 meterss. The flank collapse scenario is applied with slide dimensions of 2000 meters long, 1500 meters wide, and 228 meters thick following previous study. The tsunami model consists of the initial tide model and the coastal model. The highest tsunami run-up of the tide model is in Carita of 1.9 meters height. The fastest arrival time of the tide model is in Sumur of 19 minutes. which is slightly different from previous studies due to different modeling applications and different initial tide locations. The highest tsunami run-up of the coastal model is in Lesung and Sumur of 2.5 meters height which almost matches the results of field observations.
Flood modelling due to climate change impact in the Logawa watershed
Authors: Nabil Hakim Arvin , Suroso  , Bekti Santoso Purwanto , Sunaryo Agus
Published: December 2023

Rainfall change is one of the results of global climate change. It is required to analyse the impact of rainfall changes on flood risks. The aims of this research are (i) to model the watershed using the HECHMS hydrological model, (ii) to apply the scenario-neutral approach, (iii) to perform the frequency analysis using simulated discharges, and (iv) to determine the response and sensitivity of the watershed due to rainfall changes. This research uses a quantitative method using secondary data. The data required in this research are the watershed's geospatial and biogeophysical data. The simulation methods used in this model are the user Hyetograph Model, SCS Curve Number, Clark’s Unit Hydrograph, Recession Baseflow, and Muskingum Routing. The results of this research are (i) the hydrological model of the watershed with a percent bias score of 19.18% and an NSE score of 0.218; (ii) 130 total scenarios as the result of the RStudio using the scenario-neutral approach; (iii) the discharge result from frequency analysis with return periods of 1.1, 2, 5, 10, 20, 30, 40, 50, 100, and 200 years; and (iv) the watershed’s sensitivity with the average highest maximum discharge from November to April and the average lowest maximum discharge from May to October.
The influence of cross-equatorial northerly surge in the western maritime continent
Authors: Dewi BP , Amri Sayful , Robi Muharsyah , DPO Veanti , Novria Sagita
Published: December 2023

Cross Equatorial Northerly Surge (CENS) is a synoptic disturbance that occurs during the boreal winter in November-December-January-February-March (NDJFM). This phenomenon affects convective activity and rainfall on the Maritime Continent (MC). This study aims to determine the relationship and influence of CENS on cloudiness and rain in western Indonesia. The data used are Mean Top Net Long- Wave Radiation Flux (MTNLWRF) data, Global Satellite Mapping of Precipitation (GSMaP) rainfall, and ERA-5 reanalysis data. This study analyzes spatial correlation, low-level moisture transport (LLMT) and its divergence, spatial composite, and hovmoller of anomalies of MTNLWRF and GSMAP. These results show that the identification of CENS for 20 years (2003–2022) obtained 204 days of CENS events. The relationship between CENS, cloudiness, and rainfall is significant, with a correlation coefficient of 0.465 and -0.345. When CENS occurs, the North Coast region of West Java has a large moisture transport and convergence there. The range of moisture transport is from 240 kg/m/s to 300 kg/m/s. It increased convective clouds and rainfall in the region, which reached 534 mm/day on the north coast of West Java. The peak of increased rainfall due to CENS in the north-coastal of West Java occurs in the Early Morning around 03 Local Time.
Development of stability criteria for risk reduction in the Desa Kubang Tangah in Sawahlunto Indonesia
Authors: Martanto Adji Bayu , Istijono Bambang , Hadiansyah Dian , Yuliza Yenni , Farid Akmal
Published: December 2023

Sawahlunto City is one of 19 cities/regencies in West Sumatra Province that is highly vulnerable to landslides. The topography is steeply wavy, including in Kubang Tangah village, Lembah Segar subdistrict. The city already has a land use plan that limits urban development. During the Dutch East Indies government, Sawalunto was known as a coal mining city. This city did not develop for a time after coal mining stopped. Studies that provide scientific considerations are needed, considering that this city has limited land, is prone to landslides, and is an underground mining area. As such, geological studies and geotechnical investigations are carried out to obtain the necessary data, followed by an analysis of the potential for landslides in the Kubang Tangah village area, which, in April 2023, experienced a landslide disaster resulting in road infrastructure and several houses being damaged. Furthermore, based on the analysis of safety factor criteria using the limit equilibrium method, which compares driving forces and slope-resisting forces, it is proposed to be considered in plans to develop settlements and road infrastructure to reduce the risk of landslides.
Flood monitoring and community based flash flood warning system for flood prone region
Authors: Shet Suraj , Megha Mayuri B.G. , Jayaprakash M.C.
Published: December 2023

Flooding is one of the major disasters occurring in various parts of the world. Due to the high density of buildings, flash floods are prevalent in cities. Floods in India is a huge obstacle to achieving economic growth in the country. Monsoon induced Flash floods hit the Southern Coast of India every year. The flood destroyed thousands of houses and swept some of them down into the sea killing hundreds of peoples, injured many, along with causing several landslides. Southern Coast of India Flood marked in a row of severe monsoon flooding. As a solution to this problem, this proposed work an approach to develop a hypothetical flood alarming system. This research work discusses a proposed solution for the problem by alerting the residents to move to safety before water level rises and also to take necessary precautions to reduce the local risk of flooding via mobile phone which is sent through Short Message Service (SMS) using GSM module. The rainfall and discharge values (flow rate) of the flood affected area are collected and sorted on the daily values. From the rainfall values, flow rate is calculated. It has been observed and estimated discharges were compared analytically and graphically using IoT (Arduino UNO) system.
Performance of rubber asphalt in split mastic asphalt mixture
Authors: Putri Elsa Eka , Kasyafi Farras Muhammad Rafa , Ahmad Fauziah
Published: December 2023

Latex is obtained by cutting the stems of sap-producing plants. Latex can stabilise asphalt mixtures [1]. Rubber asphalt is polymer-modified asphalt to which additives are added as natural rubber in the form of a liquid, namely latex. The type of pavement used in this research is Split Mastic Asphalt (SMA). SMA is a surface layer with a high percentage of fine aggregate than Asphalt-Concrete and Hot-Rolled- Sheets pavement [2]. Tests were carried out using 7% latex of the total asphalt weight. The research was conducted to determine the value of the Marshall characteristics and compare between 7% Rubberized (Rb) Asphalt and Non-Rubberized (NRb) Asphalt. The stability value increased by 43.7% for Rb asphalt in the SMA pavement mixture compared to the NRb Asphalt. The stability increases from 1943.23 kg for NRb asphalt to 2791.712 kg for SMA with 7% rubber (Rb Asphalt). The flow value for Rb Asphalt SMA follows the standard, namely 3.77 mm, with an MQ value of 760.24 kg/mm. With an increase in Marshall parameter values, the rubber Asphalt was appropriate to be added to the SMA pavement. Road surfaces made with rubber SMA may require less frequent maintenance and resurfacing, which can reduce the environmental impact associated with road construction and maintenance activities.
Identification of soil characteristics in the Central Java Region using the HVSR (Horizontal to Vertical Spectral Ratio) inversion method
Authors: Darmawan Caroline Julian , Pranata Bayu , Sutrisno  , Anggun Elisabet
Published: December 2023

This research aims as one of the efforts to mitigate earthquake disasters by using the HVSR method based on microtremor data at 28 BMKG seismic stations in the central Java Island region to estimate the dominant frequency (f0) and amplification (A0) that describe the dynamic characteristics of the soil and analyse the shear wave velocity at a depth of 30 meters (Vs30). The dominant frequency values in the study area range from 0.648 to 18.257 Hz. The amplification values scattered in the study area ranged from 0.788 - 7.496. This research also produces dominant period parameters (T0) and seismic vulnerability (Kg). The highest seismic vulnerability values are at BUJI in Buayan, Kebumen; GBJI in Gringsing, Batang; and SBJM in Sanden, Bantul. In addition, the Vs30 value is helpful to determine how strong the building foundation resists earthquakes. Based on the Vs value in the ground profile with ellipticity curve modelling, the Vs30 value ranges from 204.756 - 903.046 m/s. The distribution of Vs30 values shows that the research points in central Java are spread by a variety of hard and very dense soil types to soft rock (SC).
Website design of a spatial data dissemination system and soil classification based on geotechnical engineering (case study: Surabaya City)
Authors: Saputra Satria Bagas Kara , Mu’afa Muhammad Akhdan , Gustono Sandy Tri , Nugroho Hapsoro Agung , Hariyanto  , Sinambela Marzuki
Published: December 2023

The Indonesian Meteorology, Climatology, and Geophysics Agency (BMKG) provides information on meteorology, climatology, and geophysics related to soil classification and characteristics. This data is crucial for spatial mapping and needs to be easily understood by the public. Soil classification mapping is vital for urban planning and earthquake mitigation in densely populated areas. To address this, a website was created for easy access to soil classification mapping data in Surabaya. The website utilizes QGIS for raster map processing. Users select parameters to display interactive raster maps with measured values for assessing soil conditions. A survey evaluated the website and app, resulting in 77,2% to 85,7% user satisfaction. The study confirms their usability and effectiveness. This journal presents the system's design and implementation for disseminating spatial data and soil classification information. It highlights the potential for supporting efficient urban planning and earthquake risk mitigation, benefiting the public and authorities.
E-RA (Earthquake Rapid Assessment), application-based rapid assessment tools
Authors: Fauzan  , Carol Naurah Daffa , Syandriaji Diva , Al Jauhari Zev , Hakim Lukman Mul
Published: December 2023

Earthquake rapid assessment after an earthquake is critical to gather the data for public damaged houses. In the past, many methods were used for assessing damaged houses, while most used manual methods by writing or filling out a print-out form. This type of method took up a lot of time to collect the data from every assessor and assessed as having many shortcomings. It caused the National Agency for Disaster Countermeasure (BNPB) to develop an application-based data collecting tool called “InaRISK” as an improvement to the existing rapid assessment method. Even though this application has made some breakthroughs; there are still some drawbacks, especially in using the application without an internet connection that affected to the data validation. So, the Andalas University Team decided to develop an improvement to InaRISK called “E-RA (Earthquake Rapid Assessment)” that can used without an internet connection and is more accessible. This paper discusses the development of a rapid assessment application called E-RA for collecting damaged houses data after an earthquake.
Material properties of palm bark Cross Laminated Timber (CLT) infill wall for earthquake-resistant reinforced concrete buildings: a preliminary investigation
Authors: Hamidi Ahmad , Tanjung Jafril , Aulia Teuku Budi
Published: December 2023

This study conducts a preliminary investigation to determine the material properties of Cross- Laminated Timber (CLT) made from the bark of unproductive palm trunks. One-third of the lower part of palm trunks, aged over 20 years, was used for this purpose. CLTs were created by laminating palm boards into three and five layers, each measuring 200 mm x 20 mm x 1500 mm. A chemical epoxy was employed for lamination. The palm stems were dried in an oven at 110°C for 24 hours. Test results revealed a water content of 6.79% and a specific gravity of 0.23 gr/cm3 in oil palm stems. According to ASTM D143-94- 2005 and JIS Z210-21118 standards, wood's acceptable moisture content ranges from 12% to 20%. Given its low specific weight and minimal water content, palm oil trunks, including infill walls, show promise for use in earthquake-resistant construction.
The impact of COVID-19 pandemic on non-cyclical consumer companies based on their series of financial performance using fuzzy c-means clustering
Authors: Devianto Dodi , Kamil Fajrul Ichsan , Maiyastri  , Asdi Yudiantri
Published: December 2023

The increasing interest in investment among the younger generation, most as primary consumer goods, requires understanding how to invest properly. During COVID-19 pandemic, many consumers noncyclical companies of the young generation have affected their sustainability in market places. This study aims to discuss the impact of COVID-19 pandemic on the clustering of consumer non-cyclical companies based on the ratio of financial performance using the fuzzy c-means clustering. The data was obtained from the Indonesia stock exchange, which is a series up to December 2021 that measures the financial performance of 84 companies engaged in the consumer non-cyclical sector. The variables used in this study are PER, DER, ROA, ROE, and NPM which are the company's profitability ratios. The optimum number of clusters is determined from the largest value of the modified partition coefficient. Based on the results of the fuzzy c-means test, 79 companies are included in the first cluster, while in the second cluster there are five companies. The second cluster is the best cluster based on their ratio of financial performance. The result confirmed that fewer companies had better financial performance during the COVID-19 pandemic, and this situation affected the younger investments during the pandemic.
An overview of different models used in the deterministic approach for landslide susceptibility mapping
Authors: Manan Wardatun Ahmar Abdul , Yusof Mohamed Khatif Tawaf Mohamed , Rahim Siti Marissa Abd , Razali Roslizayati , Rashid Ahmad Safuan A. , Khanan Mohd Faisal Abdul , Rahman Muhammad Zulkarnain Abdul
Published: December 2023

Landslides, which can cause fatalities, property damage, and economic disruption, are some of the most catastrophic natural disasters in hilly areas. Researchers have created landslide susceptibility maps to forecast rainfall-induced landslides, particularly in hill site developments. A physically based model is more familiar in rainfall-induced landslide analysis, which consists of hydrological and infinite slopestability models. This paper discusses the susceptibility of rainfall-induced landslides through four approaches: shallow landslide stability model, stability index mapping, transient rainfall infiltration, gridbased regional slope-stability model, and Yon-Sey slope model. The basic concepts, applications and limitations of each model are highlighted. SINMAP and SHALTAB do not consider the infiltration and groundwater flow temporally compared to TRIGRS and YS models. Nonetheless, TRIGRS solely considers 1-dimensional infiltration versus time without spatially compromising groundwater flow. Besides, YS-Slope considers regional and temporal distributions of fluctuations in groundwater variations, which can predict shallow and deep-seated failure. Further exploration needs to be carried out due to the limitations of applying these four models, which are applicable to simple landslide processes in relatively homogenous and suitable geomorphology and geology conditions.
Optimizing the Injection Molding Parameters of Mask Waste Recycling into Door Knob Products
Authors: Arizka Annabila Muflikh , Widiastuti Indah , Estriyanto Yuyun
Published: December 2023

The COVID pandemic has prompted people to adopt new facemask usage habits, which has led to an increase in the waste generated following facemask disposal. Recycling could be considered as a way to minimize facemask waste's adverse environmental impact because of its polymeric component. In this study, the recycling of face mask waste was carried out using injection molding to create a commercial door knob product. The experiment performed using Taguchi L4 orthogonal array was used to optimize injection molding parameters of the barrel and molding temperature as well as the inclusion of the ear loop part. Analysis of variance (ANOVA) ascertains the percent contributions to have minimal shrinkage and maximum product weight. Finally, grey relational analysis (GRA) was performed to obtain optimal parameters in multi-objective optimization. The optimal parameter combination was raised to ensure the successful recycling of waste facemasks into a commercial product.
Enhancing Heat Transfer Performance: Nanofluids Application in Helical Microfin Tube Concentric Heat Exchangers
Authors: Tama Dida Efendi Hilbran , Kristiawan Budi , Enoki Koji , Tri Wijayanta Agung , Hadi Syamsul
Published: December 2023

This manuscript explores the application of nanofluids in helical microfin tube concentric heat exchangers and investigates the potential for improved heat transfer performance. Helical microfin tubes offer enhanced heat transfer characteristics due to increased surface area and improved fluid mixing. When combined with nanofluids, which are base fluids with suspended nanoparticles, the thermal conductivity and convective heat transfer properties can be further enhanced. The objective of this present work is to investigate experimentally on heat transfer enhancement Al2O3/distilled water (0.05 vol.%) flowing through a helical microfin concentric heat exchanger in both parallel and counter flow in the vertical direction. The result is revealed that Al2O3/water nanofluids has enhanced thermal evaluation performance to water as base fluid. Counter flow might exhibit a more balanced performance, with a moderate enhancement in heat transfer while considering the pressure drop compared to parallel flow.
Thermal Stability and Surface Area Modification of Natural Zeolite Through HCl & NaCl Treatment to Apply in Pyrolysis Systems
Authors: Sunaryo  , Suyitno  , Arifin Zainal , Setiyo Muji , Panji Diharja Febi
Published: December 2023

Pyrolysis technology relies on efficient catalyst materials to expedite the process and improve the quality of the final product. Modified natural zeolite has emerged as a promising heterogeneous catalyst in this regard. This study presents a comprehensive analysis of natural zeolite sourced from Tasikmalaya, West Java, with the primary aim of evaluating its potential as a catalyst. The samples underwent acid treatment procedures and were extensively characterized using BET, TGA, SEM-EDX, X-Ray Diffraction (XRD), and FT-IR tests. XRD results indicated that the predominant frame structure of the Indonesian raw natural zeolite was mordenite, with a Si/Al ratio ranging from 5.0 to 6.0 and a surface area of approximately 23 m²/g. Following the 1M HCl acid treatment, a significant enhancement in the Si/Al ratio to 7.8 and a considerable expansion in surface area to 125.37 m²/g were observed. Moreover, the natural zeolite demonstrated remarkable thermal stability, thus underscoring its potential as a highly suitable catalyst for various pyrolysis applications.
Real-Time Microgrid Centralized Control For Consuming Water Pump
Authors: Kusmantoro Adhi , Farikhah Irna
Published: December 2023

The need for a source of electricity increases in accordance with the increasing use of water pumps for irrigating rice fields and homes. Renewable energy in Indonesia is abundant, especially solar energy. Several previous studies on solar energy for pump power sources still used autonomous systems. The aim of this research is renewable energy management using outseal PLC-based centralized control. The method used is to design a centralized control system using Simulink Matlab with components photovoltaic A (PV-A), photovoltaic B (PV-B), Battery-A, Battery-B, bidirectional DCDC converter, solar charge controller (SCC), inverter, and water pump. Implementation of the system using PLC outseal. The results of the study show that the design of a centralized control system can regulate alternating battery and PV sources to supply the load. At night or when the weather is not sunny, the load uses a battery source. When it is daytime and the weather is sunny, the load uses a PV source.
The Optimization Model of Final Project Examination Scheduling in Two Different Locations: A Case Study
Authors: Akhiyat Mokh Toni , Rosyidi Cucuk Nur , Laksono Pringgo Widyo
Published: December 2023

The Nursing Undergraduate Study Program of the Vocational Faculty of Universitas Airlangga has two classes in two different cities: Gresik and Lamongan. The final project examination scheduling in the study program should be scheduled simultaneously to minimize the round-trip of the examiner. Currently, the scheduling process is done manually without a certain systematic method or approach. In this paper, an optimization model is developed to solve the scheduling problem. Several factors are considered in the model, namely the number of examiners, examination room availability, and the home campus of eachexaminer. The model employed an integer programming approach with the objective function of maximizing the totalassignment of the examiners in the time slot. The model cansolve the scheduling problem more efficiently than manual scheduling.
Research Trends on Smart Connected Products in The Industry 4.0: A Systematic Literatur Review
Authors: Fahma Fakhrina , Sutopo Wahyudi , Pujiyanto Eko , Nizam Muhammad
Published: December 2023

The Industry 4.0 concept is a new manufacturing approach that integrates smart factories, smart machines, smart systems, smart production, and smart processes into a unified network. Through applying CPS (Cyber-Physical Systems) technology, Industry 4.0 combines the physical and virtual worlds to increase company productivity and efficiency. This paper aims to explore research trends related to smart (connected) products in the Industry 4.0 era and find studies that can be developed in the future using a systematic literature review (SLR). The results of the SLR show that from 57 papers, it was found that product engineering and CPS technology were the aspects of the study that were mainly carried out. New research potentials that can be developed in the future have been identified in product engineering, smart factory, and standardization studies. Future research on SCP can be applied to the case of electric motorcycles swappable battery (EMSB).
Measurement of Forearm Muscle Activity and Elbow Angle of the Elderly in Using Different Types of Cane Handles through Electromyography (EMG) and Kinovea Software
Authors: Imam Fathoni Sahriyanto Haidar , Rochman Taufiq , Widyo Laksono Pringgo , Herdiman Lobes , Susmartini Susy
Published: December 2023

Elderly individuals often experience physical limitations, leading to a decline in their walking ability and an increased risk of falling. Falls among the elderly are a critical issue that can be minimized by using walking aids such as a Cane. However, the use of a cane poses other risks, such as injuries like carpal tunnel syndrome (CTS), caused by repetitive hand movements and changes in hand angles. The objective of this research is to select the appropriate cane handle to minimize the strain on the wrist by analyzing forearm muscle signals measured using EMG (Electromyography) combined with angle measurements using Kinovea software. The study involved 8 elderly subjects who regularly used a cane during walking gait tests. The distribution of the load during walking with the cane was assessed. The results, in the form of EMG data, were segmented based on time and angles, allowing the extraction of features using the root mean square (RMS) method. The next step involved conducting a three-way ANOVA statistical test for experimental design and identifying interactions between each factor. The findings revealed that the cane handle with a fritz-type grip, positioned posteriorly, and used during the initial phase of walking had the lowest values, measuring 50.373 μV for the fritz cane, 52.03 μV for the posterior position, and 56.74 μV for the initial angle. This indicates that a cane with a fritz handle distributes the load on the forearm towards the wrist more minimally, reducing the risk of CTS.
Inventory Control Using ABC Classification and Min-Max Stock Method in The Manufacture of Armored Vehicle Body Hull at PT XYZ
Authors: Hernandoko Nauval , Widyo Laksono Pringgo
Published: December 2023

Research and development efforts are currently underway to enhance inventory control systems. However, fluctuations in demand often pose challenges to achieving optimal inventory management. To address this issue, it is crucial to establish efficient control measures that maintain an optimal inventory level. This study focuses on finding an effective approach for PT XYZ to manage stockpiles of raw materials for armored vehicle body hulls, aiming to prevent shortages or excessive stockpiling. The research uses the ABC categorization system and the min-max stock approach as its material inventory control strategies. Inventory classification, inventory turnover, the amount of safety stock, minimum stock, maximum stock, and order quantity are all determined using this procedure. By conducting a case study on PT XYZ's material inventory control for Panzer body hulls, it was identified that 3 materials fell under the important category (A), 3 materials in the moderate category (B), and 20 materials in the less critical category (C). The findings of this research are that the ABC method and min-max stock can be used as a reliable foundation for establishing inventory control parameters. Companies are advised to evaluate and consider the rules for each material, such as material costs, rare or not material types, and a history of delays from suppliers. These factors play a significant role in determining appropriate inventory control measures.
Designing Body Life Bag Using Reusable Ice Gel As A Curative Measure To Handle Heat Stroke Cases Of Indonesian Hajj Jamaah
Authors: Utami Ghina , Herdiman Lobes , Zakaria Roni
Published: December 2023

Hajj is the fifth pillar of Islam which is carried out physically, activities in the outside environment can reach 30 hours exposing pilgrims to hot temperatures [3]. The Indonesian Ministry of Health recorded that 430 Indonesian pilgrims died each year between 2012 and 2019 due to heat stroke. The Indonesian Ministry of Health for Hajj 2022 uses body bags as a medium for storing ice water, creating fear among pilgrims and making it difficult to get ice water. The body life bag is an innovative immersion device using ice gel. Testing of three alternative body life bag designs (Salamon, Arabiyan, Camel Poc) was carried out by three subjects aged 42 years. Subjects were selected based on the similarity in appearance of fatigue due to exposure to environmental heat with elderly Indonesian pilgrims. The criteria of BMI are 30.45 kg/m2, 26.93 kg/m2, and 27.64 kg/m2. The test was carried out during the day under exposure to environmental heat with an ambient temperature of 28.3oC, an air speed of 1.5 m/s, and an air humidity of 43 g/m2. This test was based on ISO 9920 and ISO 11079 standards. There were three alternative designs of the Body Life Bag, the fastest cooling time was 5 minutes 41 seconds and the subject's final temperature was obtained at 33.2oC. So the most effective design for lowering body temperature is the Salamon design.
A Location-Routing-Inventory (LRI) Model in Cold Chain Logistic Considering Carbon Emissions
Authors: Dwi Larasati Putri , Nur Rosyidi Cucuk , Widyo Laksono Pringgo
Published: December 2023

Location-Routing-Inventory (LRI) model is used in logistic chain to select the location of facilities (distribution center, warehouse, or store), the transportation routes between facilities, and the allocation of inventory stored in each facility. This paper proposes developing the LRI model by considering carbon emissions through carbon cap & trade policy, carbon cap policy, and carbon tax policy. Cold chain logistics is a type of logistics chains that keeps perishable products in cold temperatures and produces higher carbon emissions than conventional logistics chain. The development of the LRI model in this paper aims not only to optimize the cost of selecting facility locations, transportation routes, and inventory amount, but also includes optimizing the cost of purchasing raw materials from suppliers under the implementation of carbon emission policies in cold chain logistic. The optimal solution is carried out using LINGO 18.0 and shows that this model can optimize the costs in cold chain logistics by considering carbon emission policies. The results show that the carbon cap policy is the most profitable policy for the company because it produces the lowest total cost compared to other carbon emission policies.