Mass bleaching occurred in 2010 in Southeast Asia waters such as Thailand, Malaysia, and Indonesia. One of the Indonesian waters that experienced bleaching was Weh Island area, which then underwent bleaching again in 2016 and had impacts on the coral ecosystem. Substrate changes and coral cover conditions are noteworthy to determine the potential for coral recovery after bleaching. Therefore, the study aims to measure the condition of coral cover and the potential for coral resilience after bleaching in 2016. Benthic data collection used the Point Intercept Transect method while measuring coral resilience potential used the resilience index through coral cover indicators, fleshy seaweed, and rubble. The observation showed that the coral cover in the waters of Ujong Seuke was 34%, fleshy seaweed by 2.83%, and rubble by 21.17%. This research concludes that the condition of coral reef ecosystems after the bleaching phenomenon in 2016 was in moderate condition, and it has a high potential for resilience. Keywords: coral, bleaching, water, ujong seuke, east coast, Weh Island
{"title":"Potential of Coral Resilience Post Bleaching in 2016 in the Water of Ujong Seuke East Coast of Weh Island Indonesia","authors":"N. Aldyza, T. Barus, M. Mulya, M. Sarong","doi":"10.18502/kls.v8i1.15497","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15497","url":null,"abstract":"Mass bleaching occurred in 2010 in Southeast Asia waters such as Thailand, Malaysia, and Indonesia. One of the Indonesian waters that experienced bleaching was Weh Island area, which then underwent bleaching again in 2016 and had impacts on the coral ecosystem. Substrate changes and coral cover conditions are noteworthy to determine the potential for coral recovery after bleaching. Therefore, the study aims to measure the condition of coral cover and the potential for coral resilience after bleaching in 2016. Benthic data collection used the Point Intercept Transect method while measuring coral resilience potential used the resilience index through coral cover indicators, fleshy seaweed, and rubble. The observation showed that the coral cover in the waters of Ujong Seuke was 34%, fleshy seaweed by 2.83%, and rubble by 21.17%. This research concludes that the condition of coral reef ecosystems after the bleaching phenomenon in 2016 was in moderate condition, and it has a high potential for resilience. \u0000Keywords: coral, bleaching, water, ujong seuke, east coast, Weh Island","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"24 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140375498","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}
Muhsang Sudadama, Lieko Liedokto, Hery Susanto, I. Sulandra
Bauer et al. describe Goursat’s theorem, representing the characteristics of subgroups of a direct product of two or more groups. In this paper, we expand into a ring structure that describes the characteristics of subrings of a direct product of rings. This research method is to analogize the evidence by Bauer et al. in the group for generalization. In our main results, every subring of the direct product of rings is determined by ring epimorphism between the ring and factor ring. Keywords: Goursat’s theorem, subrings, rings
{"title":"Generalization of Goursat's Theorem for Subrings of Direct Products of n Rings","authors":"Muhsang Sudadama, Lieko Liedokto, Hery Susanto, I. Sulandra","doi":"10.18502/kls.v8i1.15397","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15397","url":null,"abstract":"Bauer et al. describe Goursat’s theorem, representing the characteristics of subgroups of a direct product of two or more groups. In this paper, we expand into a ring structure that describes the characteristics of subrings of a direct product of rings. This research method is to analogize the evidence by Bauer et al. in the group for generalization. In our main results, every subring of the direct product of rings is determined by ring epimorphism between the ring and factor ring. \u0000Keywords: Goursat’s theorem, subrings, rings","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"68 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376450","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}
This study aims to utilize solid waste pulp green liquor dregs and slaker grits by analyzing the effect of adding solid waste green liquor dregs and slaker grits on water absorption and tile compressive strength, analyzing the chemical content of solid waste green liquor pulp dregs and slaker grits and concrete tile products and chemical morphology of the samples. The method used in this research is pressing. The results of the water absorption test for concrete roof tiles with the addition of 0%, 5%, 10%, and 15% solid waste green liquor pulp and slaker grits were 8.4%, 6.4%, 7.5%, and 9.4%. Testing the compressive strength of concrete tiles with the addition of 0%, 5%, 10%, and 15% solid waste green liquor pulp and slaker grits was 19.0 MPa, 19.7 MPa, 18.6 MPa, and 18.3 MPa. The chemical content of solid waste pulp before and after the finished concrete tile product is in accordance with the building blocks of the tile which consists of compounds Al2O3, SiO2, Fe2O3, and CaO. From the above test, it can be concluded that the addition of solid waste pulp can produce quality concrete roof tiles with reference to the value of SNI 0096-2007, that the maximum water absorption value of tile is 10% and the compressive strength of roof tiles is at least 6.0 MPa. Keywords: solid waste, green liquor, slaker grits, rooftile
{"title":"Utilization of Solid Waste Pulp Green Liquor Dregs and Slaker Grits for Rooftile Production Application","authors":"E. M. Tamboesai","doi":"10.18502/kls.v8i1.15389","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15389","url":null,"abstract":"This study aims to utilize solid waste pulp green liquor dregs and slaker grits by analyzing the effect of adding solid waste green liquor dregs and slaker grits on water absorption and tile compressive strength, analyzing the chemical content of solid waste green liquor pulp dregs and slaker grits and concrete tile products and chemical morphology of the samples. The method used in this research is pressing. The results of the water absorption test for concrete roof tiles with the addition of 0%, 5%, 10%, and 15% solid waste green liquor pulp and slaker grits were 8.4%, 6.4%, 7.5%, and 9.4%. Testing the compressive strength of concrete tiles with the addition of 0%, 5%, 10%, and 15% solid waste green liquor pulp and slaker grits was 19.0 MPa, 19.7 MPa, 18.6 MPa, and 18.3 MPa. The chemical content of solid waste pulp before and after the finished concrete tile product is in accordance with the building blocks of the tile which consists of compounds Al2O3, SiO2, Fe2O3, and CaO. From the above test, it can be concluded that the addition of solid waste pulp can produce quality concrete roof tiles with reference to the value of SNI 0096-2007, that the maximum water absorption value of tile is 10% and the compressive strength of roof tiles is at least 6.0 MPa. \u0000Keywords: solid waste, green liquor, slaker grits, rooftile","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"83 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376201","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}
W. Setya, Epa Paujiah, Yusri Amalia, Subagja Burhaanuddin
Light from the sun is the need for living things both on land and in the air. The moon, as a medium that reflects sunlight in one month, has several phases. This phase affects the situation on earth, especially river mouths. This study aims to determine the effect of the moon phase on physical parameters (water temperature and air temperature) at the mouth of the river. This research was conducted in 4 moon phases on the physics parameters at three coastal estuaries during the day and night. Based on the study results, it was found that the moon phase of the physical parameters is very influential on the number of micro-organisms. The number of organisms in each estuary also shows different characteristics according to moon phase conditions. Keywords: moon phase, physical parameter
{"title":"Effect of Moon Phase on Physical Parameters at the Mouth of the River","authors":"W. Setya, Epa Paujiah, Yusri Amalia, Subagja Burhaanuddin","doi":"10.18502/kls.v8i1.15622","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15622","url":null,"abstract":"Light from the sun is the need for living things both on land and in the air. The moon, as a medium that reflects sunlight in one month, has several phases. This phase affects the situation on earth, especially river mouths. This study aims to determine the effect of the moon phase on physical parameters (water temperature and air temperature) at the mouth of the river. This research was conducted in 4 moon phases on the physics parameters at three coastal estuaries during the day and night. Based on the study results, it was found that the moon phase of the physical parameters is very influential on the number of micro-organisms. The number of organisms in each estuary also shows different characteristics according to moon phase conditions. \u0000Keywords: moon phase, physical parameter","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"53 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376556","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}
Fadia Mulyarti, Sugiyanto, Sri Subanti, E. Zukhronah, W. Sulandari
The financial crisis that occurred in 1997 and 2008 had a negative impact on several countries, including Singapore. A financial crisis can occur suddenly so it can endanger a country’s economy if it is not prepared for it. Therefore, early detection of financial crises is needed as a form of crisis warning so that the government can anticipate and prepare appropriate policies. The independent variables used are monthly data of 11 key macroeconomic and financial indicators of Singapore’s economy from January 1990 to June 2021. The Perfect signal is used as the dependent variable in the crisis early detection system. This study aims to build a model of a financial crisis detection system in Singapore using Multilayer Perceptron Backpropagation (MLPBP) as a neural network algorithm by comparing the optimization of Stochastic Gradient Descent (SGD) and Nesterov-accelerated Adaptive Moment Estimation (Nadam). The optimal hyperparameter value in the model was searched using the grid search method based on the accuracy and obtained the best model with 11-11-1 network architecture, best optimization is Nadam, learning rate = 0.1;
{"title":"Implementation of Neural Network in Early Detection of Financial Crisis in Singapore","authors":"Fadia Mulyarti, Sugiyanto, Sri Subanti, E. Zukhronah, W. Sulandari","doi":"10.18502/kls.v8i1.15587","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15587","url":null,"abstract":"The financial crisis that occurred in 1997 and 2008 had a negative impact on several countries, including Singapore. A financial crisis can occur suddenly so it can endanger a country’s economy if it is not prepared for it. Therefore, early detection of financial crises is needed as a form of crisis warning so that the government can anticipate and prepare appropriate policies. The independent variables used are monthly data of 11 key macroeconomic and financial indicators of Singapore’s economy from January 1990 to June 2021. The Perfect signal is used as the dependent variable in the crisis early detection system. This study aims to build a model of a financial crisis detection system in Singapore using Multilayer Perceptron Backpropagation (MLPBP) as a neural network algorithm by comparing the optimization of Stochastic Gradient Descent (SGD) and Nesterov-accelerated Adaptive Moment Estimation (Nadam). The optimal hyperparameter value in the model was searched using the grid search method based on the accuracy and obtained the best model with 11-11-1 network architecture, best optimization is Nadam, learning rate = 0.1;","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"44 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376775","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}
The needed information about the diversity data in the area that can be used in ecological areas in the future is requested to be investigated. This study aims to analyze the diversity of macroalgae on the west coast of Pananjung beach, Pangandaran nature reserve. The study was conducted from March to April 2020. This research used a survey method using three stations representing the research region. Sampling was taken out in the intertidal zone of the Coastal Coast of West Pananjung, Pangandaran nature reserve, West Java using the purposive sampling method. Data taken consisted of macroalgae types found at each observation station and measurements of environmental data consisting of pH, temperature, salinity, and flow velocity. The results showed that there were 21 species of macroalgae grouped into 9 orders, 13 families, and 3 divisions. The research can conclude that macroalgae in Pananjung Barat Beach Pangandaran have an index value that indicates a moderate category, an evenness index classified as a low category, and a dominance index classified as a low category that shows the dominant species was there and it was Padina australis. Keywords: macroalgae diversity, west coastal, Pananjung beach.
{"title":"Analysis of Macroalgae Diversity in the West Coastal of Pananjung Beach, Pangandaran","authors":"Aip Muhamad Irpan, Surti Kurniasih, Susi Sutjihati, Suci Siti Lathifah, Resmilia Anugrah, Siti Aqila, Muhamad Alfieansyah","doi":"10.18502/kls.v8i1.15502","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15502","url":null,"abstract":"The needed information about the diversity data in the area that can be used in ecological areas in the future is requested to be investigated. This study aims to analyze the diversity of macroalgae on the west coast of Pananjung beach, Pangandaran nature reserve. The study was conducted from March to April 2020. This research used a survey method using three stations representing the research region. Sampling was taken out in the intertidal zone of the Coastal Coast of West Pananjung, Pangandaran nature reserve, West Java using the purposive sampling method. Data taken consisted of macroalgae types found at each observation station and measurements of environmental data consisting of pH, temperature, salinity, and flow velocity. The results showed that there were 21 species of macroalgae grouped into 9 orders, 13 families, and 3 divisions. The research can conclude that macroalgae in Pananjung Barat Beach Pangandaran have an index value that indicates a moderate category, an evenness index classified as a low category, and a dominance index classified as a low category that shows the dominant species was there and it was Padina australis. \u0000Keywords: macroalgae diversity, west coastal, Pananjung beach.","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"26 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140373968","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}
Eli Rohaeti, Amalia Sultan Nanda Annisa, Rusita, K. Budiasih, N. Ariyanti
The objectives of this study were to determine the effects of modification of goat skin with silver nanoparticles prepared using brown algae (Padina sp.) and assisted microwave on hydrophobic properties, antimicrobial activity, mechanical properties, and biodegradability of goat skin. The synthesis of silver nanoparticles was carried out using the microwave method with a bioreductor of brown algae extract (Padina sp.) and a stabilizer of a starch solution. Characterization of the resulting silver nanoparticles was conducted by determining the wavelength utilizing the UV-Vis instrument and the particle size with a particle size analyzer (PSA). Characterization of the modified goat skin was conducted by measuring hydrophobicity through the sessile drop method, the antimicrobial activity test on modified goat skin was done by determining the clear zone against Escherichia coli (gram-negative bacteria) and Staphylococcus epidermidis (gram-positive bacteria). The mechanical properties of modified goat skin were analyzed by measuring the tensile strength of the skin. The characterization with UV-Vis on the resulting silver nanoparticles revealed 426 nm in maximum absorption and the diameter of silver nanoparticles by using PSA was 58.2 nm. Based on atomic absorption spectroscopy (AAS), the study showed that as many as 99.25% of silver nanoparticle has coated the surface of pickle goat skin. The modification of goatskin by adding silver nanoparticle can increase antibacterial activity of goatskin. The contact angle and the tensile strength of goatskin after modification were 81.49
{"title":"Modification of Pickle Goatskin with Silver Nanoparticles Using Brown Algae (Padina sp.) With Assisted Microwave","authors":"Eli Rohaeti, Amalia Sultan Nanda Annisa, Rusita, K. Budiasih, N. Ariyanti","doi":"10.18502/kls.v8i1.15394","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15394","url":null,"abstract":"The objectives of this study were to determine the effects of modification of goat skin with silver nanoparticles prepared using brown algae (Padina sp.) and assisted microwave on hydrophobic properties, antimicrobial activity, mechanical properties, and biodegradability of goat skin. The synthesis of silver nanoparticles was carried out using the microwave method with a bioreductor of brown algae extract (Padina sp.) and a stabilizer of a starch solution. Characterization of the resulting silver nanoparticles was conducted by determining the wavelength utilizing the UV-Vis instrument and the particle size with a particle size analyzer (PSA). Characterization of the modified goat skin was conducted by measuring hydrophobicity through the sessile drop method, the antimicrobial activity test on modified goat skin was done by determining the clear zone against Escherichia coli (gram-negative bacteria) and Staphylococcus epidermidis (gram-positive bacteria). The mechanical properties of modified goat skin were analyzed by measuring the tensile strength of the skin. The characterization with UV-Vis on the resulting silver nanoparticles revealed 426 nm in maximum absorption and the diameter of silver nanoparticles by using PSA was 58.2 nm. Based on atomic absorption spectroscopy (AAS), the study showed that as many as 99.25% of silver nanoparticle has coated the surface of pickle goat skin. The modification of goatskin by adding silver nanoparticle can increase antibacterial activity of goatskin. The contact angle and the tensile strength of goatskin after modification were 81.49","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140374624","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}
Aidha Ratna Fajarini Sidik, P. Pitriana, Hasniah Aliah
Organic-inorganic perovskite is attracting much attention because it can be used for optoelectronic applications, such as solar cells and energy storage materials. In this study, we calculated the absorbance optical properties of perovskite ABX3 (A = Cs, Li; B = Pb; X = I, Br, Cl) in the cubic phase using DFT, one of the most common methods for analyzing the optical properties of materials. These studies were undertaken to determine the optical absorbance properties of the ABX3 perovskite as a potential for optoelectronic applications. The calculation was initiated by finding the optimization of pseudopotential and k_point, and pseudopotential GGA-PBE and k_point 8 x 8 x 8 are used as parameters to calculate absorbance optical properties. The absorbance calculation results are at a wavelength of 305.59 nm with a bandgap of 1.7608 eV for CsPbBr3, 380.78 nm with a bandgap of 2.27 eV for CsPbCl3, 301.86 nm with a bandgap of 1.35 eV for CsPbI3, 225.04 nm with a bandgap of 1.72 eV for LiPbBr3, 201.25 nm with a bandgap of 1.55 eV for LiPbCl3, and 211.58 nm with a bandgap of 1.24 eV for LiPbI3. These results indicate that ABX3 (A = Cs, Li; B = Pb; X = I, Br, Cl) has a good absorbance ability. These properties make ABX3 a potential material for optoelectronic applications. Keywords: absorbance, optical properties, ABX3, cubic phase, DFT
{"title":"Absorbance Optical Properties Calculation of ABX3 (A = Cs, Li; B = Pb; X = I, Br, Cl) Cubic Phase Using Density Functional Theory (DFT) Method","authors":"Aidha Ratna Fajarini Sidik, P. Pitriana, Hasniah Aliah","doi":"10.18502/kls.v8i1.15591","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15591","url":null,"abstract":"Organic-inorganic perovskite is attracting much attention because it can be used for optoelectronic applications, such as solar cells and energy storage materials. In this study, we calculated the absorbance optical properties of perovskite ABX3 (A = Cs, Li; B = Pb; X = I, Br, Cl) in the cubic phase using DFT, one of the most common methods for analyzing the optical properties of materials. These studies were undertaken to determine the optical absorbance properties of the ABX3 perovskite as a potential for optoelectronic applications. The calculation was initiated by finding the optimization of pseudopotential and k_point, and pseudopotential GGA-PBE and k_point 8 x 8 x 8 are used as parameters to calculate absorbance optical properties. The absorbance calculation results are at a wavelength of 305.59 nm with a bandgap of 1.7608 eV for CsPbBr3, 380.78 nm with a bandgap of 2.27 eV for CsPbCl3, 301.86 nm with a bandgap of 1.35 eV for CsPbI3, 225.04 nm with a bandgap of 1.72 eV for LiPbBr3, 201.25 nm with a bandgap of 1.55 eV for LiPbCl3, and 211.58 nm with a bandgap of 1.24 eV for LiPbI3. These results indicate that ABX3 (A = Cs, Li; B = Pb; X = I, Br, Cl) has a good absorbance ability. These properties make ABX3 a potential material for optoelectronic applications. \u0000Keywords: absorbance, optical properties, ABX3, cubic phase, DFT","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"9 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140374276","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}
Dora Isnaini Putri, Vanda Fitriyanah, Achmad Choiruddin, Jerry Dwi Trijoyo Purnomo
The total death rate or Case Fatality Rate (CFR) due to COVID-19 in Surabaya is high, that is almost twice of the global CFR (1.4%). Utilization of high-resolution data has the potential to explore COVID-19 cases, not only recording cases at the district or city level but also at the patient’s domicile level so that they can provide more detailed spatial information. Meanwhile, research exploring the risk of death from COVID-19, especially in Surabaya using spatial point process model, has not yet been carried out. In this study, an analysis of the risk of death from COVID-19 in Surabaya will be carried out using the inhomogeneous Poisson point process model with covariates or external factors used including the density of the COVID-19 referral hospital location and the proportion of confirmed COVID-19 population aged > 60 years per districts. Our model shows that referral hospitals (exp( ) = 1.03295) and places of worship (exp( ) = 1.03835) have a significant effect on death risk from COVID-19. So, there is a need for special handling for areas that have a population with a vulnerable age (> 60 years) where at this age the human immune system will decrease. Keywords: COVID-19, heath risk, spatial point process, surabaya
{"title":"COVID-19 Death Risk in Surabaya: Modeling by Spatial Point Process","authors":"Dora Isnaini Putri, Vanda Fitriyanah, Achmad Choiruddin, Jerry Dwi Trijoyo Purnomo","doi":"10.18502/kls.v8i1.15580","DOIUrl":"https://doi.org/10.18502/kls.v8i1.15580","url":null,"abstract":"The total death rate or Case Fatality Rate (CFR) due to COVID-19 in Surabaya is high, that is almost twice of the global CFR (1.4%). Utilization of high-resolution data has the potential to explore COVID-19 cases, not only recording cases at the district or city level but also at the patient’s domicile level so that they can provide more detailed spatial information. Meanwhile, research exploring the risk of death from COVID-19, especially in Surabaya using spatial point process model, has not yet been carried out. In this study, an analysis of the risk of death from COVID-19 in Surabaya will be carried out using the inhomogeneous Poisson point process model with covariates or external factors used including the density of the COVID-19 referral hospital location and the proportion of confirmed COVID-19 population aged > 60 years per districts. Our model shows that referral hospitals (exp( ) = 1.03295) and places of worship (exp( ) = 1.03835) have a significant effect on death risk from COVID-19. So, there is a need for special handling for areas that have a population with a vulnerable age (> 60 years) where at this age the human immune system will decrease. \u0000Keywords: COVID-19, heath risk, spatial point process, surabaya","PeriodicalId":17898,"journal":{"name":"KnE Life Sciences","volume":"51 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376727","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}
Samuel Juliardi Sinaga, Nadrah, Rizki Ananda, Misbah Misbah, N. Muhammad, Ruben Cornelius Siagian, Kevin William Andri Siahaan, Froilan D. Mobo
Topological Quantum Field Theory or TQFT is a quantum field theory that calculates topological invariance in measurement theory and mathematical physics. In recent years, several attempts have been made to find efficient observations to determine the TQFT of quasiparticle properties. In this paper, we propose a different and very effective way to detect the critical points of TQFT by considering the system functions. We suggest the C-Function as a novel probe that is accurate for detecting the location of critical points on topological quantum. The C-function uses a holographic model to show a topological quantum phase transition between a simple topological isolation phase and a gapless Weyl semimetal. The quantum tipping point displays a strong Lifshitz-like anisotropy in the spatial direction, and a quantum phase transition that does not follow the standard Landau paradigm. The C-function precisely shows the global features of quantum criticality and distinguishes very accurately between two separate zero-temperature phases. Considering the C-function relationship with entanglement entropy can detect quantum phase transitions and can be applied outside the holographic framework. Keywords: quantum topologic, phase transitions, c-function
拓扑量子场论或 TQFT 是一种量子场论，用于计算测量理论和数学物理中的拓扑不变性。近年来，人们多次尝试寻找有效的观测方法来确定 TQFT 的准粒子特性。在本文中，我们提出了一种不同的、非常有效的方法，通过考虑系统函数来探测 TQFT 的临界点。我们建议将 C 函数作为一种新型探针，它能准确探测拓扑量子的临界点位置。C 函数使用全息模型来显示简单拓扑隔离相和无隙韦尔半金属之间的拓扑量子相变。量子临界点在空间方向上显示出强烈的李夫希兹式各向异性，量子相变并不遵循标准朗道范式。C 函数精确地显示了量子临界点的全局特征，并非常准确地区分了两个独立的零温阶段。考虑 C 函数与纠缠熵的关系可以检测量子相变，并可在全息框架外应用。关键词：量子拓扑、相变、C 函数
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