Kuwait Journal of Science最新文献

英文中文

Generation rates of greywater in Kuwaiti residential apartments

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-14 DOI: 10.1016/j.kjs.2025.100405

A. Abusam, H. Abdullah, M. Khajah, F. Al-Ajeel, A. Al-Haddad

The generation rate of greywater is typically estimated from the results of questionnaire surveys that aim to obtain information about the frequency and duration of usage of sanitary appliances. However, this method is inaccurate and prone to human error. The purpose of this study is to present an innovative approach for estimating greywater generation rates from records of high-resolution flow meters used to measure household water consumption. Ultrasonic flowmeters and data loggers were installed in the main water supply pipes in bathrooms and kitchens on the roof of a three-apartment housing complex in Kuwait. Water consumption patterns were remotely monitored for nine months using data loggers that transmitted information every 5 s. The TraceWizard® software was used to break down the time series of water consumption into various usage events for toilets, showers, hand basins, and kitchen sinks based on predetermined water usage profiles (flow rates and durations). According to the results obtained, the average daily per capita water consumption was 238 L. Furthermore, black water, light greywater, and dark greywater represented 9 %, 50 %, and 34 % of the per capita water consumption, respectively. Additionally, the leaks and unclassified volumes of water used were 1 % and 6 %, respectively. Accurate information is essential for the development of successful greywater reuse projects that significantly reduce freshwater demand.

{"title":"Generation rates of greywater in Kuwaiti residential apartments","authors":"A. Abusam, H. Abdullah, M. Khajah, F. Al-Ajeel, A. Al-Haddad","doi":"10.1016/j.kjs.2025.100405","DOIUrl":"10.1016/j.kjs.2025.100405","url":null,"abstract":"<div><div>The generation rate of greywater is typically estimated from the results of questionnaire surveys that aim to obtain information about the frequency and duration of usage of sanitary appliances. However, this method is inaccurate and prone to human error. The purpose of this study is to present an innovative approach for estimating greywater generation rates from records of high-resolution flow meters used to measure household water consumption. Ultrasonic flowmeters and data loggers were installed in the main water supply pipes in bathrooms and kitchens on the roof of a three-apartment housing complex in Kuwait. Water consumption patterns were remotely monitored for nine months using data loggers that transmitted information every 5 s. The TraceWizard® software was used to break down the time series of water consumption into various usage events for toilets, showers, hand basins, and kitchen sinks based on predetermined water usage profiles (flow rates and durations). According to the results obtained, the average daily per capita water consumption was 238 L. Furthermore, black water, light greywater, and dark greywater represented 9 %, 50 %, and 34 % of the per capita water consumption, respectively. Additionally, the leaks and unclassified volumes of water used were 1 % and 6 %, respectively. Accurate information is essential for the development of successful greywater reuse projects that significantly reduce freshwater demand.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100405"},"PeriodicalIF":1.2,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143641738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extraction and characterization of cellulose nanofibers from rice husk: Potential for electrospun PVA/CNF mat composites

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-12 DOI: 10.1016/j.kjs.2025.100403

Mahyuni Harahap , Vivi Purwandari , Devi Andiani Zebua , Nurkholidah Daulay , Suhut Alexander Situmorang , Yurika Almanda Perangin Angin , Amanda Jiamin Ong , Jonathan Siow , Ronn Goei , Alfred ling Yoong Tok , Saharman Gea

The current study examined the viability of synthesizing cellulose nanofibers (CNFs) from rice husk using acid hydrolysis 10 % HCl. The PVA polymer solution was enhanced with Triton x-100 as a surfactant and different amounts of CNF were introduced before the electrospinning procedure. The CNF extracted in this study had a diameter of 9.6 nm. It exhibited elongated, fibrous formations like a web, with a crystallinity level of 70 %. The negative charge from the CNF was introduced to augment the conductivity and viscosity of the rotating fluid. The Fourier transform infrared (FTIR) studies validated the interaction between PVA and CNFs throughout their mixing process. The use of CNF enhanced the thermal stability of the PVA nanofibrous composite. The PVA/CNF nanofibrous composite displayed smooth surfaces and potential for diverse medical applications, food packaging, and water purification.

{"title":"Extraction and characterization of cellulose nanofibers from rice husk: Potential for electrospun PVA/CNF mat composites","authors":"Mahyuni Harahap , Vivi Purwandari , Devi Andiani Zebua , Nurkholidah Daulay , Suhut Alexander Situmorang , Yurika Almanda Perangin Angin , Amanda Jiamin Ong , Jonathan Siow , Ronn Goei , Alfred ling Yoong Tok , Saharman Gea","doi":"10.1016/j.kjs.2025.100403","DOIUrl":"10.1016/j.kjs.2025.100403","url":null,"abstract":"<div><div>The current study examined the viability of synthesizing cellulose nanofibers (CNFs) from rice husk using acid hydrolysis 10 % HCl. The PVA polymer solution was enhanced with Triton x-100 as a surfactant and different amounts of CNF were introduced before the electrospinning procedure. The CNF extracted in this study had a diameter of 9.6 nm. It exhibited elongated, fibrous formations like a web, with a crystallinity level of 70 %. The negative charge from the CNF was introduced to augment the conductivity and viscosity of the rotating fluid. The Fourier transform infrared (FTIR) studies validated the interaction between PVA and CNFs throughout their mixing process. The use of CNF enhanced the thermal stability of the PVA nanofibrous composite. The PVA/CNF nanofibrous composite displayed smooth surfaces and potential for diverse medical applications, food packaging, and water purification.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100403"},"PeriodicalIF":1.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functionalized textile microplastics: A closer look at the issues, strategy, and legislation on the microplastic reduction

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-11 DOI: 10.1016/j.kjs.2025.100395

Aravin Prince Periyasamy

The problem of microplastic pollution has become more prominent as a worldwide concern. This article provides a thorough analysis of the various routes by which microplastics originating from textiles are released into the environment, encompassing soil, air, and water. This review paper provides a succinct summary of the current use of hazardous and toxic substances (such as per polyfluoroalkyl substances (PFAS), chlorine, bromine, phosphorous, halogen-based chemicals, and various formaldehyde compounds), as well as dyes (which frequently contain heavy metals like lead, arsenic, chromium, nickel, copper, cadmium, mercury, and zinc), and nanomaterials in the textile production process. Additionally, the paper examines the role of the United Nations Environment Assembly (UNEA) and the development of its resolutions on marine plastic pollution to tackle the issue of reducing microplastics in textiles. Though there is a dearth of comprehensive coverage on this topic, this paper provides an overview of the legislative and regulatory measures implemented by different countries in response to the issue of microplastic generation and focuses on textile origin.

{"title":"Functionalized textile microplastics: A closer look at the issues, strategy, and legislation on the microplastic reduction","authors":"Aravin Prince Periyasamy","doi":"10.1016/j.kjs.2025.100395","DOIUrl":"10.1016/j.kjs.2025.100395","url":null,"abstract":"<div><div>The problem of microplastic pollution has become more prominent as a worldwide concern. This article provides a thorough analysis of the various routes by which microplastics originating from textiles are released into the environment, encompassing soil, air, and water. This review paper provides a succinct summary of the current use of hazardous and toxic substances (such as per polyfluoroalkyl substances (PFAS), chlorine, bromine, phosphorous, halogen-based chemicals, and various formaldehyde compounds), as well as dyes (which frequently contain heavy metals like lead, arsenic, chromium, nickel, copper, cadmium, mercury, and zinc), and nanomaterials in the textile production process. Additionally, the paper examines the role of the United Nations Environment Assembly (UNEA) and the development of its resolutions on marine plastic pollution to tackle the issue of reducing microplastics in textiles. Though there is a dearth of comprehensive coverage on this topic, this paper provides an overview of the legislative and regulatory measures implemented by different countries in response to the issue of microplastic generation and focuses on textile origin.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100395"},"PeriodicalIF":1.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Commutant properties of w-core inverses

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-05 DOI: 10.1016/j.kjs.2025.100390

Chengcheng Wang , Huihui Zhu , Julio Benítez

In this paper, we investigate commutant properties of the

w

-core inverse in a

*

-semigroup. Among these, it is shown that

if and only if

a

is equal projection (EP) with

, where

a

and

w

are elements of a

*

-semigroup. As applications, equivalent conditions such that a core invertible element is an EP element are given. Then, commutant properties of the

w

-core inverse for complex matrices are correspondingly given. Finally, some results on double commutants and the reverse order law for

w

-core inverses are given.

引用次数: 0

Investigation of the bioactive constituents of Goniothalamus wightii: Antioxidant, anti-inflammation, antimicrobial, anticancer, and molecular docking studies

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-04 DOI: 10.1016/j.kjs.2025.100392

Vino Palani , Balamuralikrishnan Balasubramanian , Santhosh Chinnaraj , Arunkumar Malaisamy , Viji Maluventhen , Vijaya Anand Arumugam , Wen-Chao Liu , Maruthupandian Arumugam

The aim of the current study was to isolate and purify the bioactive metabolite compound using Goniothalamus wightii leaf extracts and evaluate the antioxidant, antibacterial, antibiofilm, and in vitro cytotoxic activities and their in-silico molecular docking studies. A novel compound of 6-[(E)-2-phenylethenyl]-5,6-dihydro-2H-pyran-2-one was purified by column chromatography and characterized by fourier transform infrared spectroscopy, liquid chromatography-mass spectrum, and types and numbers of nuclei in a molecule are examined by nuclear magnetic resonance. Antioxidant activities are evaluated by 2, 2-diphenyl-1-picyrl-hydrazyl, 2ʼ, -2ʼ azino bis-(3-ethylbenzothiazoline-6-sulphonic acid, and ferric reducing power assays. The antibacterial and antibiofilm activities of active bio compounds against human pathogens by agar well diffusion methods. Cytotoxic activities of the active compound were evaluated against breast and cervical cancer cell lines by cytotoxicity assay and acridine orange/ethidium bromide staining methods. Likewise, anti-inflammatory activities have more potent inhibitory effects on human red blood cell membrane stabilization and protein denaturation assays. Further, this compound was evaluated computationally using Schrödinger software. The antimicrobial, antioxidant, and anticancer protein markers were chosen based on their activity and properties. The discovered bioactive compound synergizes and may lead to new drugs shortly. This study concluded that the 6-[(E)-2-phenylethenyl]-5,6-dihydro-2H-pyran-2-one is a moral source isolated from the natural medicinal plant for therapeutic purposes.

{"title":"Investigation of the bioactive constituents of Goniothalamus wightii: Antioxidant, anti-inflammation, antimicrobial, anticancer, and molecular docking studies","authors":"Vino Palani , Balamuralikrishnan Balasubramanian , Santhosh Chinnaraj , Arunkumar Malaisamy , Viji Maluventhen , Vijaya Anand Arumugam , Wen-Chao Liu , Maruthupandian Arumugam","doi":"10.1016/j.kjs.2025.100392","DOIUrl":"10.1016/j.kjs.2025.100392","url":null,"abstract":"<div><div>The aim of the current study was to isolate and purify the bioactive metabolite compound using <em>Goniothalamus wightii</em> leaf extracts and evaluate the antioxidant, antibacterial, antibiofilm, and <em>in vitro</em> cytotoxic activities and their <em>in-silico</em> molecular docking studies. A novel compound of 6-[(E)-2-phenylethenyl]-5,6-dihydro-2H-pyran-2-one was purified by column chromatography and characterized by fourier transform infrared spectroscopy, liquid chromatography-mass spectrum, and types and numbers of nuclei in a molecule are examined by nuclear magnetic resonance. Antioxidant activities are evaluated by 2, 2-diphenyl-1-picyrl-hydrazyl, 2ʼ, -2ʼ azino bis-(3-ethylbenzothiazoline-6-sulphonic acid, and ferric reducing power assays. The antibacterial and antibiofilm activities of active bio compounds against human pathogens by agar well diffusion methods. Cytotoxic activities of the active compound were evaluated against breast and cervical cancer cell lines by cytotoxicity assay and acridine orange/ethidium bromide staining methods. Likewise, anti-inflammatory activities have more potent inhibitory effects on human red blood cell membrane stabilization and protein denaturation assays. Further, this compound was evaluated computationally using Schrödinger software. The antimicrobial, antioxidant, and anticancer protein markers were chosen based on their activity and properties. The discovered bioactive compound synergizes and may lead to new drugs shortly. This study concluded that the 6-[(E)-2-phenylethenyl]-5,6-dihydro-2H-pyran-2-one is a moral source isolated from the natural medicinal plant for therapeutic purposes.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100392"},"PeriodicalIF":1.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping landslide vulnerability using subsurface rock elastic parameters: A case study of Lebong Regency, Bengkulu

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-04 DOI: 10.1016/j.kjs.2025.100393

Arif Ismul Hadi , M. Farid , Lindung Zalbuin Mase , Refrizon , Reni Mulyasari , Muhammad Afif Nabhan , Darmawan Ikhlas Fadli , Eli Putriani , Erlan Sumanjaya

The Ketahun segment fault, a part of the Sumatran Fault that crosses through Lebong Regency in Bengkulu Province, Indonesia, has the potential to trigger on-land earthquakes, leading to landslides. Our research, conducted with utmost meticulousness, aims to map landslide potential using the Analytical Hierarchy Process (AHP). We thoroughly analyse various parameters, including rock elasticity, fault distance to measurement points, rainfall, slope and elevation, land cover, ground shear strain (GSS), the time-averaged shear wave velocity for the first 30 m depth (V_s30), peak ground acceleration (PGA), and modified Mercalli intensity (MMI). The data acquisition process involves the field survey and secondary data collection. The latter is conducted to support the analysis and input of field survey data. The field survey entailed collecting microtremor data using the Horizontal Spectral Ratio (HVSR) method. Subsequently, microtremor data recorded through the HVSR method were processed using win-MASW 5.2 HVSR software. Based on these results, we can identify areas with potential landslides based on rock elastic parameters. The landslide potential map, performed by overlaying these parameters using AHP statistical weighting, highlights the dominant influence of landslide potential stemming from the GSS value, distance of faults to the measurement points, slope gradient, and high rainfall in the study area. In regions exhibiting a high potential for landslides, it is imperative to exercise caution and prepare for disaster mitigation activities to mitigate the risk of such occurrences.

{"title":"Mapping landslide vulnerability using subsurface rock elastic parameters: A case study of Lebong Regency, Bengkulu","authors":"Arif Ismul Hadi , M. Farid , Lindung Zalbuin Mase , Refrizon , Reni Mulyasari , Muhammad Afif Nabhan , Darmawan Ikhlas Fadli , Eli Putriani , Erlan Sumanjaya","doi":"10.1016/j.kjs.2025.100393","DOIUrl":"10.1016/j.kjs.2025.100393","url":null,"abstract":"<div><div>The Ketahun segment fault, a part of the Sumatran Fault that crosses through Lebong Regency in Bengkulu Province, Indonesia, has the potential to trigger on-land earthquakes, leading to landslides. Our research, conducted with utmost meticulousness, aims to map landslide potential using the Analytical Hierarchy Process (AHP). We thoroughly analyse various parameters, including rock elasticity, fault distance to measurement points, rainfall, slope and elevation, land cover, ground shear strain (GSS), the time-averaged shear wave velocity for the first 30 m depth (<em>V</em><sub><em>s30</em></sub>), peak ground acceleration (PGA), and modified Mercalli intensity (MMI). The data acquisition process involves the field survey and secondary data collection. The latter is conducted to support the analysis and input of field survey data. The field survey entailed collecting microtremor data using the Horizontal Spectral Ratio (HVSR) method. Subsequently, microtremor data recorded through the HVSR method were processed using win-MASW 5.2 HVSR software. Based on these results, we can identify areas with potential landslides based on rock elastic parameters. The landslide potential map, performed by overlaying these parameters using AHP statistical weighting, highlights the dominant influence of landslide potential stemming from the GSS value, distance of faults to the measurement points, slope gradient, and high rainfall in the study area. In regions exhibiting a high potential for landslides, it is imperative to exercise caution and prepare for disaster mitigation activities to mitigate the risk of such occurrences.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100393"},"PeriodicalIF":1.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of ZnO content on activated carbon/ZnO for enhanced acetaminophen removal under very low light intensity: Kinetics, operational variables, and radical trapping response

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-03-03 DOI: 10.1016/j.kjs.2025.100391

Nurul Izzati Izhar , Zul Adlan Mohd Hir , Hartini Ahmad Rafaie , Shaari Daud

The activated carbon-supported ZnO (AC/ZnO) photocatalyst was prepared using a simple mixing approach with varying ZnO mass ratio. The photoactivity was tested against acetaminophen (ACE) in an aqueous solution, assisted by low UVC light intensity (7 W). Characterization analyses revealed that the AC/ZnO particles mainly exhibited irregular shapes with uniform distributions and high crystallinity, and the primary oxidation state in the structure is Zn²⁺ with standard chemical state difference of 23 eV. The band gap of the AC/ZnO composite photocatalysts decreased when AC was integrated with ZnO. Among the composite photocatalysts, higher separation efficiency was observed comparatively with a low ZnO content. Interestingly, the fabrication of AC onto ZnO appeared to contribute to a significant enhancement in photoactivity of pristine ZnO. The photodegradation of ACE by AC/ZnO (0.05:1.5) followed pseudo-first order kinetics and almost complete removal of ACE was achieved under normal conditions. The photo-induced charge carrier's excellent separation efficiency, as demonstrated by the band gap and photoluminescence spectra, was associated with the optimized activities beneath UVC irradiation. The best photocatalyst can be recycled up to five times towards ACE degradation without any regeneration step or severe deactivation.

{"title":"Influence of ZnO content on activated carbon/ZnO for enhanced acetaminophen removal under very low light intensity: Kinetics, operational variables, and radical trapping response","authors":"Nurul Izzati Izhar , Zul Adlan Mohd Hir , Hartini Ahmad Rafaie , Shaari Daud","doi":"10.1016/j.kjs.2025.100391","DOIUrl":"10.1016/j.kjs.2025.100391","url":null,"abstract":"<div><div>The activated carbon-supported ZnO (AC/ZnO) photocatalyst was prepared using a simple mixing approach with varying ZnO mass ratio. The photoactivity was tested against acetaminophen (ACE) in an aqueous solution, assisted by low UVC light intensity (7 W). Characterization analyses revealed that the AC/ZnO particles mainly exhibited irregular shapes with uniform distributions and high crystallinity, and the primary oxidation state in the structure is Zn<sup>2+</sup> with standard chemical state difference of 23 eV. The band gap of the AC/ZnO composite photocatalysts decreased when AC was integrated with ZnO. Among the composite photocatalysts, higher separation efficiency was observed comparatively with a low ZnO content. Interestingly, the fabrication of AC onto ZnO appeared to contribute to a significant enhancement in photoactivity of pristine ZnO. The photodegradation of ACE by AC/ZnO (0.05:1.5) followed pseudo-first order kinetics and almost complete removal of ACE was achieved under normal conditions. The photo-induced charge carrier's excellent separation efficiency, as demonstrated by the band gap and photoluminescence spectra, was associated with the optimized activities beneath UVC irradiation<strong>.</strong> The best photocatalyst can be recycled up to five times towards ACE degradation without any regeneration step or severe deactivation.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100391"},"PeriodicalIF":1.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Detection of sea urchins (Diadema setosum) colony distribution on UAV imagery data using fuzzy logic approach

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-02-24 DOI: 10.1016/j.kjs.2025.100389

Ayub Sugara , Yenni P. Sari , Muhamad S. Sangadji , Aninda W. Rudiastuti , Teguh A. Pianto , Vincentius P. Siregar , Syamsul B. Agus , Dewayany Sutrisno

Unmanned aerial vehicle (UAV) technology has been widely used to identify the spatial distribution of marine and coastal resources. Diadema setosum plays a crucial role in controlling algae populations in coral reef ecosystems, which would otherwise compete with corals for sunlight. Diadema setosum lives in colonies and generally exists in shallow water areas such as coral, seagrass, and sand. Due to its ecological importance in controlling algae and its economic value as a high-nutrient food source, monitoring and managing the distribution and abundance of Diadema setosum is crucial for sustaining coastal ecosystems. This study aimed to assess the ability of UAV imagery to detect the spatial distribution of Diadema setosum colonies using a simple index ratio approach and fuzzy logic. The study was conducted on the southwest coast of Lancang Island, Seribu Islands, Indonesia, from May 3 to 12, 2018. The results showed that the red-green ratio index (RGRI) band combination from the UAV image was better at detecting Diadema setosum colonies than the green-blue ratio index (GBRI) was. The range of index values for Diadema setosum obtained from GBRI and RGRI transformations were 0.717887–1.989796 and 0.510457–1.183333, respectively. The combination of fuzzy logic and the RGRI band index demonstrated strong performance in detecting the distribution of Diadema setosum colonies, achieving an overall classification accuracy exceeding 90%.

{"title":"Detection of sea urchins (Diadema setosum) colony distribution on UAV imagery data using fuzzy logic approach","authors":"Ayub Sugara , Yenni P. Sari , Muhamad S. Sangadji , Aninda W. Rudiastuti , Teguh A. Pianto , Vincentius P. Siregar , Syamsul B. Agus , Dewayany Sutrisno","doi":"10.1016/j.kjs.2025.100389","DOIUrl":"10.1016/j.kjs.2025.100389","url":null,"abstract":"<div><div>Unmanned aerial vehicle (UAV) technology has been widely used to identify the spatial distribution of marine and coastal resources. <em>Diadema setosum</em> plays a crucial role in controlling algae populations in coral reef ecosystems, which would otherwise compete with corals for sunlight. <em>Diadema setosum</em> lives in colonies and generally exists in shallow water areas such as coral, seagrass, and sand. Due to its ecological importance in controlling algae and its economic value as a high-nutrient food source, monitoring and managing the distribution and abundance of Diadema setosum is crucial for sustaining coastal ecosystems. This study aimed to assess the ability of UAV imagery to detect the spatial distribution of <em>Diadema setosum</em> colonies using a simple index ratio approach and fuzzy logic. The study was conducted on the southwest coast of Lancang Island, Seribu Islands, Indonesia, from May 3 to 12, 2018. The results showed that the red-green ratio index (RGRI) band combination from the UAV image was better at detecting <em>Diadema setosum</em> colonies than the green-blue ratio index (GBRI) was. The range of index values for <em>Diadema setosum</em> obtained from GBRI and RGRI transformations were 0.717887–1.989796 and 0.510457–1.183333, respectively. The combination of fuzzy logic and the RGRI band index demonstrated strong performance in detecting the distribution of <em>Diadema setosum</em> colonies, achieving an overall classification accuracy exceeding 90%.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100389"},"PeriodicalIF":1.2,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Drone-assisted climate-smart agriculture (DACSA): A spatially-based outcome prediction model as an initial approach to track yield changes in shallot planting areas

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-02-21 DOI: 10.1016/j.kjs.2025.100388

Gunawan S. Prabowo , Andreas P. Adi , Ari S. Budiyanta , Adi Wirawan , Abdul Aziz , Fuad S. Pranoto , Try Kusuma , Angga Septiawan , Danartomo , Bambang H. Trisasongko

The challenge of meeting the world's food demands while protecting the environment is an urgent concern. Leveraging Technology 4.0, precision agriculture management emerges as a promising solution to enhance efficiency and effectiveness. With this goal in mind, a research project was undertaken to develop a spatial model capable of providing real-time notifications on changes in plant yield and location. This map would enable farmers to monitor their fields more precisely and with greater detail. The research commenced by conducting direct soil measurements and capturing crop spectra using drones equipped with multispectral cameras. The collected data was then mosaicked, processed, and combined with crop yield data to create a set of samples. Machine learning algorithms were employed to make predictions, and the yield projections were integrated into spatial maps. These maps can be utilized for navigation and to track areas anticipated to experience yield changes. The result is a spatial map model that serves as a tracking and navigation system, empowering farmers to monitor crop yield changes effectively. This research is an integral part of the development of the Drone-Assisted Climate-Smart Agriculture (DACSA) system, which employs drones for tasks such as obtaining multispectral image data from onion plants, mapping, spraying, and fertilizing. Leveraging the input data spectrum, this spatial navigation map model is expected to contribute to the gradual implementation of precision agriculture, ensuring sustained productivity, and enabling the localization of crop issues in specific areas.

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A versatile family of distributions: Log-linear regression model and applications to real data

IF 1.2 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Kuwait Journal of Science

Pub Date : 2025-02-12 DOI: 10.1016/j.kjs.2025.100385

Mustapha Muhammad , Badamasi Abba , Isyaku Muhammad , Hassan S. Bakouch , Jinsen Xiao

This article introduces a tractable generator for constructing flexible families of continuous distributions called the exponent-G-M (ExpG-M). Properties of the defined models generator are studied such as moments, mean deviation, moment of residual life, entropy, and order statistics. The ExpG-M model’s parameter was estimated using both maximum likelihood estimation (MLE) and Bayesian estimation (BE) methods with a square error loss function, also assessed through Monte Carlo simulation studies. A special member called exponent generalized exponential-exponential distribution (ExpGE-E) is discussed; a related log-regression model based on ExpGE-E is introduced. Applications of the ExpGE-E and its regression model to real-life datasets shows that the proposed models have better modeling abilities than many competing distributions.

引用次数: 0

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全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

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Kuwait Journal of Science

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