Pub Date : 2023-10-09DOI: 10.55766/sujst-2023-04-e0873
Tatiya Trongsatitkul, Keavalin Jitkokkruad, Kasama Jarukumjorn, Saowapa Chaiwong
This work reported the use of microwave vulcanization coupled with Dunlop process to prepared natural rubber latex foam (NRLF). Optimization of microwave heating for curing step was firstly carried out using a commercially available domestic microwave oven. The processing window and optimum condition for making NRLF were obtained. The optimum power and time of the irradiation were found at 600 W and 6 min, respectively. Using the optimum microwave vulcanization, effects of stirring time (2, 4, 6, 8, and 10 min) and speed (650, 950, 1250, 1550, and 1850 rpm) of foaming step on cell structure, bulk density, compressive properties, and hardness of NRLFs were investigated. Generally, the increases in the stirring time and speed in foaming step both gave rise to the volume of the air incorporated into the latex compound. This resulted in the increases in the bulk density and the number of cell but, the decrease in foam cell size. The stirring speed in a range of 950 to 1550 rpm was successfully used for preparing the NRLF. Too low and too high foaming speeds caused unstable latex compounds and failed to produce NRLF. The foam cell structure changed dramatically as the foaming speed increased. The foam mechanical properties, both compressive strength and hardness, were found to be linearly related to the foam bulk density.
{"title":"EFFECTS OF FOAMING PARAMETERS ON PHYSICAL PROPERTIES OF MICROWAVE-VULCANIZED NATURAL RUBBER LATEX FOAMS (IVCST2021)","authors":"Tatiya Trongsatitkul, Keavalin Jitkokkruad, Kasama Jarukumjorn, Saowapa Chaiwong","doi":"10.55766/sujst-2023-04-e0873","DOIUrl":"https://doi.org/10.55766/sujst-2023-04-e0873","url":null,"abstract":"This work reported the use of microwave vulcanization coupled with Dunlop process to prepared natural rubber latex foam (NRLF). Optimization of microwave heating for curing step was firstly carried out using a commercially available domestic microwave oven. The processing window and optimum condition for making NRLF were obtained. The optimum power and time of the irradiation were found at 600 W and 6 min, respectively. Using the optimum microwave vulcanization, effects of stirring time (2, 4, 6, 8, and 10 min) and speed (650, 950, 1250, 1550, and 1850 rpm) of foaming step on cell structure, bulk density, compressive properties, and hardness of NRLFs were investigated. Generally, the increases in the stirring time and speed in foaming step both gave rise to the volume of the air incorporated into the latex compound. This resulted in the increases in the bulk density and the number of cell but, the decrease in foam cell size. The stirring speed in a range of 950 to 1550 rpm was successfully used for preparing the NRLF. Too low and too high foaming speeds caused unstable latex compounds and failed to produce NRLF. The foam cell structure changed dramatically as the foaming speed increased. The foam mechanical properties, both compressive strength and hardness, were found to be linearly related to the foam bulk density.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135146961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
While designing roadway facilities the pedestrian crosswalks must be given high importance, because these are the locations where pedestrians interact with vehicular traffic directly. This study aims to determine Pedestrian Perception values (PV) and assess the Level of Service (LOS) for crosswalk facilities provided for pedestrians at signalized intersections in heterogeneous traffic conditions. For this purpose, 24 crosswalks of six signalized intersections were chosen: 16 crosswalk locations were used for model development and eight crosswalk locations were used for model validation. The perception value of pedestrians was collected by conducting a questionnaire survey and traffic data was collected using a videographic survey. The parameters considered for the present study are: pedestrian volume, time is taken by the pedestrian to cross the crosswalk, length of crosswalk, pedestrian crossing speed, vehicular volume, and turning movements. The present research work proposed a mathematical model for Perception Value (PV) to assess the LOS of crosswalks of signalized intersections in urban areas. The results of the study are helpful in enhancing pedestrian safety and comfort at crosswalks.
{"title":"LEVEL OF SERVICE ANALYSIS OF PEDESTRIAN CROSSING FACILITIES AT SIGNALIZED INTERSECTIONS UNDER HETEROGENEOUS TRAFFIC CONDITIONS","authors":"Seelam Srikanth, Ramireddy Sushmitha, Sanikommu Venkata Garata Reddy, Ekkaluri Sanjeeva","doi":"10.55766/sujst-2023-04-e00143","DOIUrl":"https://doi.org/10.55766/sujst-2023-04-e00143","url":null,"abstract":"While designing roadway facilities the pedestrian crosswalks must be given high importance, because these are the locations where pedestrians interact with vehicular traffic directly. This study aims to determine Pedestrian Perception values (PV) and assess the Level of Service (LOS) for crosswalk facilities provided for pedestrians at signalized intersections in heterogeneous traffic conditions. For this purpose, 24 crosswalks of six signalized intersections were chosen: 16 crosswalk locations were used for model development and eight crosswalk locations were used for model validation. The perception value of pedestrians was collected by conducting a questionnaire survey and traffic data was collected using a videographic survey. The parameters considered for the present study are: pedestrian volume, time is taken by the pedestrian to cross the crosswalk, length of crosswalk, pedestrian crossing speed, vehicular volume, and turning movements. The present research work proposed a mathematical model for Perception Value (PV) to assess the LOS of crosswalks of signalized intersections in urban areas. The results of the study are helpful in enhancing pedestrian safety and comfort at crosswalks.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135147129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
While designing roadway facilities the pedestrian crosswalks must be given high importance, because these are the locations where pedestrians interact with vehicular traffic directly. This study aims to determine Pedestrian Perception values (PV) and assess the Level of Service (LOS) for crosswalk facilities provided for pedestrians at signalized intersections in heterogeneous traffic conditions. For this purpose, 24 crosswalks of six signalized intersections were chosen: 16 crosswalk locations were used for model development and eight crosswalk locations were used for model validation. The perception value of pedestrians was collected by conducting a questionnaire survey and traffic data was collected using a videographic survey. The parameters considered for the present study are: pedestrian volume, time is taken by the pedestrian to cross the crosswalk, length of crosswalk, pedestrian crossing speed, vehicular volume, and turning movements. The present research work proposed a mathematical model for Perception Value (PV) to assess the LOS of crosswalks of signalized intersections in urban areas. The results of the study are helpful in enhancing pedestrian safety and comfort at crosswalks.
{"title":"LEVEL OF SERVICE ANALYSIS OF PEDESTRIAN CROSSING FACILITIES AT SIGNALIZED INTERSECTIONS UNDER HETEROGENEOUS TRAFFIC CONDITIONS","authors":"Seelam Srikanth, Ramireddy Sushmitha, Sanikommu Venkata Garata Reddy, Ekkaluri Sanjeeva","doi":"10.55766/sujst-2023-04-e0143","DOIUrl":"https://doi.org/10.55766/sujst-2023-04-e0143","url":null,"abstract":"While designing roadway facilities the pedestrian crosswalks must be given high importance, because these are the locations where pedestrians interact with vehicular traffic directly. This study aims to determine Pedestrian Perception values (PV) and assess the Level of Service (LOS) for crosswalk facilities provided for pedestrians at signalized intersections in heterogeneous traffic conditions. For this purpose, 24 crosswalks of six signalized intersections were chosen: 16 crosswalk locations were used for model development and eight crosswalk locations were used for model validation. The perception value of pedestrians was collected by conducting a questionnaire survey and traffic data was collected using a videographic survey. The parameters considered for the present study are: pedestrian volume, time is taken by the pedestrian to cross the crosswalk, length of crosswalk, pedestrian crossing speed, vehicular volume, and turning movements. The present research work proposed a mathematical model for Perception Value (PV) to assess the LOS of crosswalks of signalized intersections in urban areas. The results of the study are helpful in enhancing pedestrian safety and comfort at crosswalks.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135146712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thailand has an aging society which is affected by the social and economic dimensions of the country. Products and services for the well-being of the elderly are becoming very competitive markets. This study investigated Thai elderly preferences toward apparel fabrics. In total, 40 Thai elderly women were interviewed on their purchasing behavior relating to clothing and their attitudes to different types of fabric. The free sorting task method was applied to 28 fabric samples based on their suitability for different applications by elderly people. The results showed that the factors influencing apparel purchasing by the elderly were price, tactile properties, and apparel pattern design. The elderly considered sensorial comfort, breathability, and softness as important components of good quality in a fabric for well-being. The sorting task produced 6 groups. The sleeping wear group was associated with all knitted fabrics and related to soft and stretched textures that provided comfort, while loungewear had a high association with the fabrics made of linen fiber based on the descriptive words ‘soft’, ‘comfort’, ‘airy’, ‘natural’, and ‘stiff’. Business professional wear had a high association with fabrics made of silk, linen, and cotton based on the descriptive words ‘thick’, ‘stiff’, and ‘look expensive’. These findings could provide guidelines for designing and manufacturing fabrics whose characteristics match the demands of the elderly, as well as guiding the fabrics to use to create clothing providing well-being for the elderly.
{"title":"INVESTIGATION OF FABRIC TACTILE CHARACTERISTICS FOR DIFFERENT CLOTHING BASED ON ELDERLY PERSPECTIVES","authors":"Pithalai Phoophat, Aussama Soontrunnarudrungsri, Rungsima Chollakup","doi":"10.55766/sujst-2023-04-e02413","DOIUrl":"https://doi.org/10.55766/sujst-2023-04-e02413","url":null,"abstract":"Thailand has an aging society which is affected by the social and economic dimensions of the country. Products and services for the well-being of the elderly are becoming very competitive markets. This study investigated Thai elderly preferences toward apparel fabrics. In total, 40 Thai elderly women were interviewed on their purchasing behavior relating to clothing and their attitudes to different types of fabric. The free sorting task method was applied to 28 fabric samples based on their suitability for different applications by elderly people. The results showed that the factors influencing apparel purchasing by the elderly were price, tactile properties, and apparel pattern design. The elderly considered sensorial comfort, breathability, and softness as important components of good quality in a fabric for well-being. The sorting task produced 6 groups. The sleeping wear group was associated with all knitted fabrics and related to soft and stretched textures that provided comfort, while loungewear had a high association with the fabrics made of linen fiber based on the descriptive words ‘soft’, ‘comfort’, ‘airy’, ‘natural’, and ‘stiff’. Business professional wear had a high association with fabrics made of silk, linen, and cotton based on the descriptive words ‘thick’, ‘stiff’, and ‘look expensive’. These findings could provide guidelines for designing and manufacturing fabrics whose characteristics match the demands of the elderly, as well as guiding the fabrics to use to create clothing providing well-being for the elderly.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135147043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-09DOI: 10.55766/sujst-2023-04-e01487
Pantip Piyatadsananon, Ekkaluk Salakkham
Heat hotspots cause environmental and health problems to residents in urban areas. Green space has been used to reduce the temperature in urban areas. However, the size and location of the green space that can reduce the temperature in those areas are challenging. This study aims to identify the heat hotspot of an urban area and estimate the green space proportion to reduce the heat hotspot. Therefore, the Split Window method (SW) was initially employed to calculate the Land Surface Temperature (LST) data from the Landsat series in the summertime of 2014, 2016, and 2018. The LST data 2018 were used in heat hotspot investigation using Moran's I and Getis-Ord Gi*. The results show the clustering patterns of LST occurring in barren lands, racetracks, and built-up areas in Buriram Municipality. Then, the monthly regression modeling between the green space proportions and LST was analyzed and applied to the hotspot areas. The green space proportions were represented by estimating in regression models showing the ratio of green space and decreasing temperature in hotspot areas. As a result, the green space proportion around 45% of the area is suggested to mitigate the heat hotspot. The explored green space proportion was applied to the 2014 and 2016 data to assess the feasibility of hotspot mitigation. This research presents a simplified technic that will enable urban planners to estimate the green space proportion to reduce the heat hotspots effectively.
{"title":"URBAN GREEN SPACE ESTIMATION FOR HEAT HOTSPOT MITIGATION IN A SMALL CITY, BURIRAM MUNICIPALITY, THAILAND","authors":"Pantip Piyatadsananon, Ekkaluk Salakkham","doi":"10.55766/sujst-2023-04-e01487","DOIUrl":"https://doi.org/10.55766/sujst-2023-04-e01487","url":null,"abstract":"Heat hotspots cause environmental and health problems to residents in urban areas. Green space has been used to reduce the temperature in urban areas. However, the size and location of the green space that can reduce the temperature in those areas are challenging. This study aims to identify the heat hotspot of an urban area and estimate the green space proportion to reduce the heat hotspot. Therefore, the Split Window method (SW) was initially employed to calculate the Land Surface Temperature (LST) data from the Landsat series in the summertime of 2014, 2016, and 2018. The LST data 2018 were used in heat hotspot investigation using Moran's I and Getis-Ord Gi*. The results show the clustering patterns of LST occurring in barren lands, racetracks, and built-up areas in Buriram Municipality. Then, the monthly regression modeling between the green space proportions and LST was analyzed and applied to the hotspot areas. The green space proportions were represented by estimating in regression models showing the ratio of green space and decreasing temperature in hotspot areas. As a result, the green space proportion around 45% of the area is suggested to mitigate the heat hotspot. The explored green space proportion was applied to the 2014 and 2016 data to assess the feasibility of hotspot mitigation. This research presents a simplified technic that will enable urban planners to estimate the green space proportion to reduce the heat hotspots effectively.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135146645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this research, temperature-dependent thermodynamic magnetic field and specific heat jump of Fe-based superconductor were studied by two-band Ginzburg-Landau theory. The analytical form of the thermodynamic magnetic field was investigated by four temperature-dependent models; Chen’s model, Zhu’s model, Shanenko’s model and Changjan & Udomsamuthirun’s model. For the calculation of specific heat jump, we use the Ruthgers expression. Calculation findings indicate an inverse relationship between the critical temperature and the specific heat jump. When compared with various models, the results from Changjan and Udomsamuthirun's models suit experimental data of Ba1-xKxFe2As2 (x = 0.4) and KFe2As2 superconductors better
{"title":"THERMODYNAMIC MAGNETIC FIELD AND SPECIFIC HEAT JUMP OF IRON-BASED SUPERCONDUCTOR BY TWO-BAND GINZBURG-LANDAU APPROACH","authors":"Arpapong Changjan, Atirat Maksuwan, Phanuchai Pramuanl, Suppanyou Meakniti, Pongkaew Udomsamuthirun","doi":"10.55766/sujst-2023-04-e02443","DOIUrl":"https://doi.org/10.55766/sujst-2023-04-e02443","url":null,"abstract":"In this research, temperature-dependent thermodynamic magnetic field and specific heat jump of Fe-based superconductor were studied by two-band Ginzburg-Landau theory. The analytical form of the thermodynamic magnetic field was investigated by four temperature-dependent models; Chen’s model, Zhu’s model, Shanenko’s model and Changjan & Udomsamuthirun’s model. For the calculation of specific heat jump, we use the Ruthgers expression. Calculation findings indicate an inverse relationship between the critical temperature and the specific heat jump. When compared with various models, the results from Changjan and Udomsamuthirun's models suit experimental data of Ba1-xKxFe2As2 (x = 0.4) and KFe2As2 superconductors better","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135146818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-27DOI: 10.55766/sujst-2023-01-e01930
Nirav Kumar Umravia, Chandresh Solanki
The CFG pile comprises composite materials like cement, fly ash, and gravel with adequate water to achieve various grades. It is one of the best techniques to enhance ground bearing capacity in soft and problematic soil. CFG pile has a good amount of lateral resistance capacity. This research study’s main objective is to study a single and small group of casted CFG piles in the laboratory. Also, discussion on the Installation procedure of CFG pile in a confined area, temperature, and curing process. In order to improve the workability of the CFG pile, several laboratory experiments were conducted on various groups of CFG in this experimental analysis. They are made up of a variety of Cement, Fly ash, and gravel particle proportions. Moreover, the research looked at nine pile group combinations (2×1, 2×2, 3×2, 2×3 in square Paton, subjected to a lateral load in a longer direction when in three CFG piles triangular parallel and perpendicular to the base angle of triangular subjected to the lateral load) with a 1.5 D pile spacing values (where D is the pile diameter). In terms of load vs. lateral displacement, load vs. soil resistance, and associated double tangential curved method, the effects of load intensities, group configuration, and Pile are discussed. The improved plots can be used to plan laterally filled CFG piles and equations for group action design. As a result, architecture curves for assessing pile group activity using improvements were developed and implemented in experiments. Results show that the CFG pile was subjected to lateral load and lateral displacement within the permissible limit. The CFG Pile and Pile surrounding soil interaction comparative results were discussed. Suppose the suitable soil elastic modulus is selected. In that case, the numerical, analytical solution and the back load-settlement curve approach can reasonably estimate the lateral deformation concerning Depth and the group efficiency, respectively, according to the relation between numerical and experimental findings.
{"title":"AN EXPERIMENTAL AND NUMERICAL STUDY OF LATERALLY LOADED SMALL GROUPS CFG PILE IN SOFT CLAY","authors":"Nirav Kumar Umravia, Chandresh Solanki","doi":"10.55766/sujst-2023-01-e01930","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01930","url":null,"abstract":"The CFG pile comprises composite materials like cement, fly ash, and gravel with adequate water to achieve various grades. It is one of the best techniques to enhance ground bearing capacity in soft and problematic soil. CFG pile has a good amount of lateral resistance capacity. This research study’s main objective is to study a single and small group of casted CFG piles in the laboratory. Also, discussion on the Installation procedure of CFG pile in a confined area, temperature, and curing process. In order to improve the workability of the CFG pile, several laboratory experiments were conducted on various groups of CFG in this experimental analysis. They are made up of a variety of Cement, Fly ash, and gravel particle proportions. Moreover, the research looked at nine pile group combinations (2×1, 2×2, 3×2, 2×3 in square Paton, subjected to a lateral load in a longer direction when in three CFG piles triangular parallel and perpendicular to the base angle of triangular subjected to the lateral load) with a 1.5 D pile spacing values (where D is the pile diameter). In terms of load vs. lateral displacement, load vs. soil resistance, and associated double tangential curved method, the effects of load intensities, group configuration, and Pile are discussed. The improved plots can be used to plan laterally filled CFG piles and equations for group action design. As a result, architecture curves for assessing pile group activity using improvements were developed and implemented in experiments. Results show that the CFG pile was subjected to lateral load and lateral displacement within the permissible limit. The CFG Pile and Pile surrounding soil interaction comparative results were discussed. Suppose the suitable soil elastic modulus is selected. In that case, the numerical, analytical solution and the back load-settlement curve approach can reasonably estimate the lateral deformation concerning Depth and the group efficiency, respectively, according to the relation between numerical and experimental findings.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135755533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Traditionally, White Blood Cell identification is performed by experienced pathologists manually. Peripheral blood smear analysis is a laboratory procedure that helps in diagnosis of various pathological disorders such as malaria, anemia, leukemia, etc. This process is performed at a microscopic level and therefore is required to be precise. Manually performing microscopic evaluation is a challenging task. This task can be automated with the help of computer-aided systems. This work discusses various methods being used in a variety of cellular image segmentation and classification tasks with the field of the survey being concentrated on leukocyte segmentation and classification.
{"title":"A SURVEY ON VARIOUS APPROACHES FOR SEGMENTATION AND CLASSIFICATION OF WHITE BLOOD CELLS","authors":"Ananyaa Holla Byndur, Bhargavi Kota, Nidhi Shiravanthe, Sapna Sadananda, Sandhya Sadananda","doi":"10.55766/sujst-2023-01-e01917","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01917","url":null,"abstract":"Traditionally, White Blood Cell identification is performed by experienced pathologists manually. Peripheral blood smear analysis is a laboratory procedure that helps in diagnosis of various pathological disorders such as malaria, anemia, leukemia, etc. This process is performed at a microscopic level and therefore is required to be precise. Manually performing microscopic evaluation is a challenging task. This task can be automated with the help of computer-aided systems. This work discusses various methods being used in a variety of cellular image segmentation and classification tasks with the field of the survey being concentrated on leukocyte segmentation and classification.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135755677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.55766/sujst-2023-01-e01616
Sudesh Nair Baskara, Haryati Yaacob, Sitti Asmah Hassan, Mohd Rosli Hainin, Mohd Shahrir Amin Ahmad, Ramadhansyah Putra Jaya, Zaid Hazim Al-Saffar
This paper focuses on the aspect of road safety based on the impact of pavement conditions on accident severities. Four models of binomial and multinomial logistic regression were produced using the R software and utilizing two years of accident and pavement conditions data on Malaysian highways. The surface characteristics analyzed included the International Roughness Index (IRI), rut depth (RD) and mean texture depth (MTD). The accident severity assessed ranged from damage to death. Results indicated that IRI has the highest tendency to affect accident severity for all models. At the thresholds identified for all independent variables, the chances of death had increased significantly. As such, efforts must be driven to ensure the thresholds are not reached in the maintenance of pavements for better road safety.
{"title":"THE IMPACT OF PAVEMENT CONDITIONS ON ACCIDENT SEVERITIES","authors":"Sudesh Nair Baskara, Haryati Yaacob, Sitti Asmah Hassan, Mohd Rosli Hainin, Mohd Shahrir Amin Ahmad, Ramadhansyah Putra Jaya, Zaid Hazim Al-Saffar","doi":"10.55766/sujst-2023-01-e01616","DOIUrl":"https://doi.org/10.55766/sujst-2023-01-e01616","url":null,"abstract":"This paper focuses on the aspect of road safety based on the impact of pavement conditions on accident severities. Four models of binomial and multinomial logistic regression were produced using the R software and utilizing two years of accident and pavement conditions data on Malaysian highways. The surface characteristics analyzed included the International Roughness Index (IRI), rut depth (RD) and mean texture depth (MTD). The accident severity assessed ranged from damage to death. Results indicated that IRI has the highest tendency to affect accident severity for all models. At the thresholds identified for all independent variables, the chances of death had increased significantly. As such, efforts must be driven to ensure the thresholds are not reached in the maintenance of pavements for better road safety.","PeriodicalId":43478,"journal":{"name":"Suranaree Journal of Science and Technology","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136300176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.55766/sujst-2023-01-e01614
Mohammad Jawed Roshan, Ahmad Safuan A. Rashid, Norshakila Abdul Wahab, Muhammad Azril Hezmi, Siti Norafida Jusoh, Nik Daud Nik Norsyahariati, Sakina Tamasoki, Nor Zurairahetty Mohd Yunus, Roslizayati Razali
The lateritic soil, abundant in tropical and sub-tropical countries, is a common construction material used for various purposes, such as constructing transportation infrastructures, landfills, and other earthworks. The residual lateritic soil is usually located in the vadose zone (unsaturated zone) situated above the water table. Therefore, this paper investigates untreated and cement-treated lateritic soil behaviour in terms of Soil Water Characteristics Curve (SWCC), a key topic in unsaturated soil mechanics. The soil sampling was performed from Universiti Teknologi Malaysia campus, Johor Bahru, and then the collected soil was tested in the laboratory. The 3%, 6%, 9%, and 12% ordinary Portland cement (OPC) according to the dry soil weight were utilized, and then the necessary basic tests, compaction tests, and pressure plate tests were performed. The obtained data points from pressure plate extractor equipment were fitted using Fredlund and Xing and van Genuchten models. The results exposed that the used soil is plastic silt (MH) and A7-5 according to the Unified soil classification System (USCS) and AASHTO, respectively. The Maximum Dry Density (MDD) increased from 1.39 g/cm3 for untreated to 1.419 g/cm3, 1.447g/cm3, 1.46g/cm3, and 1.479g/cm3 for 3%, 6%, 9%, and 12% cement, respectively. Similarly, the Optimum Water Content (OMC) increased from 28% to 29.5, 30, 30.5, and 31% by adding 3, 6, 9, and 12% cement, respectively. Regarding the obtained SWCC results, the Air Entry Value (AEV) increased with the increasing cement content. Overall, the results revealed that the water holding capacity of lateritic soil increases with increasing cement content.
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