Pub Date : 2021-01-01DOI: 10.22232/stj.2021.09.01.11
Malsawmdawngzuali Tara, M. Murthy, G. Gurusubramanian
An increase in urbanization and anthropogenic activities has led to a decrease in the area covered by forests which has an impact on the ecosystem and the diversity of flora and fauna. Coleopterans are a group of insects which are known to play an important role to study the impact of urbanization as they act as bioindicators. A study was conducted from September 2018 to October 2019 to determine the effect of urbanization and forest size on the beetle diversity in selected sites representing urban, semi-urban, and rural areas in and around Aizawl, Mizoram. Collection was done by setting up light traps as well as manual collection and other standard methods on a bi-monthly basis. A total of 445 beetles belonging to 15 families were collected. Identification of beetles was carried out only upto family level. Beetles community showed a significant variation in different degrees of urbanization as abundance and species diversity of beetles declined with increasing urbanization in different sites. In terms of the total number of individuals collected, the family Scarabaeidae was the most dominant (21.35%), followed by Cerambycidae (19.77%) and Lucanidae (11.91%) with the highest numbers collected from rural sites. The soil parameters were analyzed which showed a significant correlation with the forest size and this, in turn, affects the beetle diversity. Overall, the diversity of beetles (diversity index, richness, and abundance) is found to be affected in such a way that it is higher in rural sites as compared to urban sites.
{"title":"Effect of Urbanization on the Diversity of Beetle Families in and around Aizawl, Mizoram","authors":"Malsawmdawngzuali Tara, M. Murthy, G. Gurusubramanian","doi":"10.22232/stj.2021.09.01.11","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.11","url":null,"abstract":"An increase in urbanization and anthropogenic activities has led to a decrease in the area covered by forests which has an impact on the ecosystem and the diversity of flora and fauna. Coleopterans are a group of insects which are known to play an important role to study the impact of urbanization as they act as bioindicators. A study was conducted from September 2018 to October 2019 to determine the effect of urbanization and forest size on the beetle diversity in selected sites representing urban, semi-urban, and rural areas in and around Aizawl, Mizoram. Collection was done by setting up light traps as well as manual collection and other standard methods on a bi-monthly basis. A total of 445 beetles belonging to 15 families were collected. Identification of beetles was carried out only upto family level. Beetles community showed a significant variation in different degrees of urbanization as abundance and species diversity of beetles declined with increasing urbanization in different sites. In terms of the total number of individuals collected, the family Scarabaeidae was the most dominant (21.35%), followed by Cerambycidae (19.77%) and Lucanidae (11.91%) with the highest numbers collected from rural sites. The soil parameters were analyzed which showed a significant correlation with the forest size and this, in turn, affects the beetle diversity. Overall, the diversity of beetles (diversity index, richness, and abundance) is found to be affected in such a way that it is higher in rural sites as compared to urban sites.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81080495","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.02
LN Chavali, L. Hmingliana, Brindha Senthil Kumar, P. Narayana
Database tuning is crucial step to enhance the performance of the application software. There are many tools available in Microsoft to evaluate the performance of the stored procedures and identify them. This paper presents a comparative performance of actual and tuned sample stored procedures in SQL Server 2008 R2 of Application software (Microsoft). The results showed there is a marginal gain in the efficiency after the database tuning.
数据库调优是提高应用软件性能的关键步骤。Microsoft中有许多工具可用于评估和识别存储过程的性能。本文在应用软件(Microsoft)的SQL Server 2008 R2中比较了实际和调优的样例存储过程的性能。结果表明，在数据库调优之后，效率有一个边际增益。
{"title":"An Approach to Fine Tuning Database Performance in Application Software","authors":"LN Chavali, L. Hmingliana, Brindha Senthil Kumar, P. Narayana","doi":"10.22232/stj.2021.09.01.02","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.02","url":null,"abstract":"Database tuning is crucial step to enhance the performance of the application software. There are many tools available in Microsoft to evaluate the performance of the stored procedures and identify them. This paper presents a comparative performance of actual and tuned sample stored procedures in SQL Server 2008 R2 of Application software (Microsoft). The results showed there is a marginal gain in the efficiency after the database tuning.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81178385","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.07
N. Hegde, Suresh Kumar, K. Khing, B. Gopichand
Timber demand and supply gap has widened over the last few decades across different regions of the world. Indian scenario is no different. In the last decade though India’s forest cover has increased at a very slow pace, in north eastern part of India, there is a loss of forest cover at an alarming rate. This is a cause of concern for this region which is already depending only on handful of quality timbers for the structural and commercial purposes. Under this scenario, few alternative options should be looked at like exploring promising indigenous fast-growing species, or exploring some lesser-known timber species available naturally in the forest. Therefore, wood quality parameters of such timber species should be tested so as to know the specific utility of these timbers. In this study of Mizoram, wood quality parameters of five underutilized timber species were assessed and three out of five species have shown considerable quality as compared to Teak and many other mainstream species. Few selected properties are highlighted in this paper to indicate possible utility of selected species to reduce the gap in demand and supply of wood as raw material. We focused mainly on anatomical properties, gross features and cell constituents of these species in this paper. The properties observed for lesser-known species are compared with twenty Indian mainstream timbers. The results have indicated that there is a need for further expanding the scope for exploring more such species so that timber requirement of the region is meted out.
{"title":"Evaluation of Wood Quality of Underutilized Indigenous Timber Species for Reducing Timber Scarcity: A Case of Mizoram, North-East India","authors":"N. Hegde, Suresh Kumar, K. Khing, B. Gopichand","doi":"10.22232/stj.2021.09.01.07","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.07","url":null,"abstract":"Timber demand and supply gap has widened over the last few decades across different regions of the world. Indian scenario is no different. In the last decade though India’s forest cover has increased at a very slow pace, in north eastern part of India, there is a loss of forest cover at an alarming rate. This is a cause of concern for this region which is already depending only on handful of quality timbers for the structural and commercial purposes. Under this scenario, few alternative options should be looked at like exploring promising indigenous fast-growing species, or exploring some lesser-known timber species available naturally in the forest. Therefore, wood quality parameters of such timber species should be tested so as to know the specific utility of these timbers. In this study of Mizoram, wood quality parameters of five underutilized timber species were assessed and three out of five species have shown considerable quality as compared to Teak and many other mainstream species. Few selected properties are highlighted in this paper to indicate possible utility of selected species to reduce the gap in demand and supply of wood as raw material. We focused mainly on anatomical properties, gross features and cell constituents of these species in this paper. The properties observed for lesser-known species are compared with twenty Indian mainstream timbers. The results have indicated that there is a need for further expanding the scope for exploring more such species so that timber requirement of the region is meted out.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89419249","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.09
Vanlal Hruaia, Lal Rinmuana, J. Lalbiaknunga, Laldinfeli Ralte
Euphorbiaceae is one of the largest family of flowering plants, in our study different species were collected from different localities of Mizoram, the collected specimens were studied and their morphological features noted. 34 genera of Euphorbiaceae s.l were used in the study. Cladistic analysis was performed in Mesquite software and Phenetic analysis was done in NTsys software. Both analyses produce a pictorial representation in a form of a tree; cladistic analysis produce phylogenetic tree (evolutionary relationship) while phenetic analysis produce phenogram (morphological relationship). The results of the aforementioned analyses were further analysed by total evidence technique and taxonomic congruence, a phylogenetic software PAUP is used for this purpose. The resultant trees were very different and comparison was done to find correlation between evolution and morphological characters. The research finds various correlation among characters like the number of locule in ovule, phyllanthoid branching and support the inclusion of genus like Breynia, Sauropus into Phyllanthus.
{"title":"A Study of Correlation between Morphology and Evolution of Euphorbiaceae s.l. using Taxonomic Congruence and Total Evidence","authors":"Vanlal Hruaia, Lal Rinmuana, J. Lalbiaknunga, Laldinfeli Ralte","doi":"10.22232/stj.2021.09.01.09","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.09","url":null,"abstract":"Euphorbiaceae is one of the largest family of flowering plants, in our study different species were collected from different localities of Mizoram, the collected specimens were studied and their morphological features noted. 34 genera of Euphorbiaceae s.l were used in the study. Cladistic analysis was performed in Mesquite software and Phenetic analysis was done in NTsys software. Both analyses produce a pictorial representation in a form of a tree; cladistic analysis produce phylogenetic tree (evolutionary relationship) while phenetic analysis produce phenogram (morphological relationship). The results of the aforementioned analyses were further analysed by total evidence technique and taxonomic congruence, a phylogenetic software PAUP is used for this purpose. The resultant trees were very different and comparison was done to find correlation between evolution and morphological characters. The research finds various correlation among characters like the number of locule in ovule, phyllanthoid branching and support the inclusion of genus like Breynia, Sauropus into Phyllanthus.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72767207","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.10
Susheel Kumar, A. Varma, V. A. Mendhe
Cleat attributes and coal quality have been evaluated through field observation, SEM images analysis and proximate-ultimate analyses on representative coal samples collected from four different underground coal mines of Son-Valley coal Basin of central India for the characterization of coal bed methane prospective. The coal samples were characterized as durainic-clarodurainic-vitrainic type to durocalrainic-clarainic type based on litho-type composition. Cleats were identified as face cleat and butt cleat range 5-10 cm-1 to 2–3 cm-1 depending on the litho-types whereas, cleat density ranges 7-16 cm-2 revealed that cleat development is influenced by litho-types. The cleat orientation shows two main strikes almost NW-SE to NNW-SSE and NE-SW to ENE-WSW elucidates the face cleat and butt cleats are perpendicular to each other. SEM images for coal samples were analysed to validate the cleat geometry at micro-scale, illustrates that face cleat and butt cleats are orthogonal to each other. The technological properties viz. moisture (Wa), volatile matter yield (VMdaf) ash yield (Ad) of coal samples are placed in the range of 0.66–11.80, 32.0–50.05 and 13.23–43.73 wt.% respectively. The fuel ratios of all the samples varied from 1.05–2.35 indicating that coal samples were of sub-bituminous to bituminous rank. The carbon and hydrogen (Cdaf, Hdaf) content of samples ranges from 68.89–86.08 and 5.22–6.60 wt.% respectively. The atomic ratio H/C and O/C through van-Krevelen diagram demonstrate the predominance of type-III/IV kerogens usually derived from terrestrial source in studied coal belongs to the gas genesis window.
{"title":"Insights of Cleat Attribute of Barakar Coal Deposits of Son Valley Basin, India: Implication for Coal Bed Methane Exploration","authors":"Susheel Kumar, A. Varma, V. A. Mendhe","doi":"10.22232/stj.2021.09.01.10","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.10","url":null,"abstract":"Cleat attributes and coal quality have been evaluated through field observation, SEM images analysis and proximate-ultimate analyses on representative coal samples collected from four different underground coal mines of Son-Valley coal Basin of central India for the characterization of coal bed methane prospective. The coal samples were characterized as durainic-clarodurainic-vitrainic type to durocalrainic-clarainic type based on litho-type composition. Cleats were identified as face cleat and butt cleat range 5-10 cm-1 to 2–3 cm-1 depending on the litho-types whereas, cleat density ranges 7-16 cm-2 revealed that cleat development is influenced by litho-types. The cleat orientation shows two main strikes almost NW-SE to NNW-SSE and NE-SW to ENE-WSW elucidates the face cleat and butt cleats are perpendicular to each other. SEM images for coal samples were analysed to validate the cleat geometry at micro-scale, illustrates that face cleat and butt cleats are orthogonal to each other. The technological properties viz. moisture (Wa), volatile matter yield (VMdaf) ash yield (Ad) of coal samples are placed in the range of 0.66–11.80, 32.0–50.05 and 13.23–43.73 wt.% respectively. The fuel ratios of all the samples varied from 1.05–2.35 indicating that coal samples were of sub-bituminous to bituminous rank. The carbon and hydrogen (Cdaf, Hdaf) content of samples ranges from 68.89–86.08 and 5.22–6.60 wt.% respectively. The atomic ratio H/C and O/C through van-Krevelen diagram demonstrate the predominance of type-III/IV kerogens usually derived from terrestrial source in studied coal belongs to the gas genesis window.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78332086","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.01
R. Kamala, R. Balasubramanian
A new three-parameter Dieterici type equation of state is employed for studying the high-temperature thermodynamic characteristics of hydrocarbons. This generalized equation of state differs from the known Dieterici equation of state by a modified attractive term. That is, a new thermodynamic similarity parameter is introduced in the attractive term of the Dieterici equation of state. The parameters of the equation of state are determined through the experimental values on the critical-point parameters of hydrocarbons. The equation of state is presented in the reduced form, from which follows the single-parameter law of corresponding states. The proposed equation of state gives the value of maximum attainable superheat for hydrocarbons of about 0.887 to 0.894 times the critical temperature. The new three- parameter generalized Dieterici equation of state offers an acceptable compliance with experimental results of maximum attainable superheat of hydrocarbons.
{"title":"Superheating Limit of Hydrocarbons Based on a Generalized Dieterici Equation of State","authors":"R. Kamala, R. Balasubramanian","doi":"10.22232/stj.2021.09.01.01","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.01","url":null,"abstract":"A new three-parameter Dieterici type equation of state is employed for studying the high-temperature thermodynamic characteristics of hydrocarbons. This generalized equation of state differs from the known Dieterici equation of state by a modified attractive term. That is, a new thermodynamic similarity parameter is introduced in the attractive term of the Dieterici equation of state. The parameters of the equation of state are determined through the experimental values on the critical-point parameters of hydrocarbons. The equation of state is presented in the reduced form, from which follows the single-parameter law of corresponding states. The proposed equation of state gives the value of maximum attainable superheat for hydrocarbons of about 0.887 to 0.894 times the critical temperature. The new three- parameter generalized Dieterici equation of state offers an acceptable compliance with experimental results of maximum attainable superheat of hydrocarbons.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90602575","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.15
Khwairakpam Amitab, L. Hmingliana, Amitabha Nath
Crop diseases are the main threat to agricultural products. Fast, accurate, and automatic detection of diseases can help to overcome this problem. Literature suggests, machine learning techniques are capable of achieving these goals in near real-time. This article presents a comprehensive review of machine learning techniques for crop disease detection and classification. Existing plant disease classification systems are explored and commonly used processing steps are investigated. Analysis of machine learning techniques, accuracy factor, and current state-of-the-art in this domain have been reviewed and presented through this manuscript. The survey resulted in the identification of the strengths and limitations of existing techniques and provides a road map for future research works. These would help researchers to understand and pursue machine learning applications in the field of disease detection and classification
{"title":"Application of Machine Learning Techniques in Crop Disease Classification: A Comprehensive Review","authors":"Khwairakpam Amitab, L. Hmingliana, Amitabha Nath","doi":"10.22232/stj.2021.09.01.15","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.15","url":null,"abstract":"Crop diseases are the main threat to agricultural products. Fast, accurate, and automatic detection of diseases can help to overcome this problem. Literature suggests, machine learning techniques are capable of achieving these goals in near real-time. This article presents a comprehensive review of machine learning techniques for crop disease detection and classification. Existing plant disease classification systems are explored and commonly used processing steps are investigated. Analysis of machine learning techniques, accuracy factor, and current state-of-the-art in this domain have been reviewed and presented through this manuscript. The survey resulted in the identification of the strengths and limitations of existing techniques and provides a road map for future research works. These would help researchers to understand and pursue machine learning applications in the field of disease detection and classification","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73170461","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.12
R. C. Lalduhsangi, D. Mandal
An investigation was performed during 2018-19 on newly planted red fleshed Dragon fruits spaced at 4mx2m with thirteen treatments viz. T1: Recommended dose of fertilizer (RDF) as 100% inorganic; T2: Farm Yard Manure (FYM) to supply 50% K + 50% RDF; T3: Vermi compost (VC) to supply 50% K + 50% RDF; T4: Neem Cake (NC) to supply 50% K + 50% RDF; T5: Farm Yard Manure (FYM) to supply 50% K + 50% RDF + Azotobacter (AZ) + Phosphate Solubilizing Bacteria (PSB) + Potash Solubilizing Bacteria (KSB); T6: VC to supply 50% K + 50% RDF+AZ+PSB+ KSB; T7: NC to supply 50% K + 50% RDF + AZ + PSB + KSB; T8: FYM to supply 25% K + VC to supply 25% K + 50% RDF + AZ + PSB + KSB; T9: FYM to supply 25% K + NC to supply 25% K + 50% RDF + AZ + PSB + KSB; T10: VC to supply 25% K + NC to supply 25% K+ 50% RDF + AZ +PSB + KSB; T11: FYM to supply 25% K + VC to supply 25% K + NC to supply 25% K + 25% RDF; T12: FYM to supply 25% K + VC to supply 25% K + NC to supply 25% K + 25% RDF + AZ + PSB + KSB; T13: Control (no fertilizer) and four replication per treatments arranged in Randomized Block Design. Results showed that plants at T5 had maximum yield (4.65 kg/vine) with maximum number of fruits per vine (14.67). However, the fruit weight (390.33g) and TSS (12.180 Brix) was found highest in T11 while, T2 had highest ascorbic acid content (21.90 mg/100g fruit weight).
2018- 2019年，对新种植的红肉火龙果进行了调查，间距为4mx2m，共13个处理，即T1:推荐肥料剂量(RDF)为100%无机;T2:农场庭院肥料(FYM)提供50% K + 50% RDF;T3: Vermi堆肥(VC)提供50% K + 50% RDF;T4:印楝饼(NC)供应50% K + 50% RDF;T5:农家肥(FYM)提供50% K + 50% RDF +固氮菌(AZ) +磷酸盐增溶菌(PSB) +钾肥增溶菌(KSB);T6: VC供应50% K + 50% RDF+AZ+PSB+ KSB;T7: NC供应50% K + 50% RDF + AZ + PSB + KSB;T8: FYM提供25% K + VC提供25% K + 50% RDF + AZ + PSB + KSB;T9: FYM供应25% K + NC供应25% K + 50% RDF + AZ + PSB + KSB;T10: VC供应25% K+ NC供应25% K+ 50% RDF + AZ +PSB + KSB;T11: FYM供应25% K + VC供应25% K + NC供应25% K + 25% RDF;T12: FYM供应25% K + VC供应25% K + NC供应25% K + 25% RDF + AZ + PSB + KSB;T13:对照(不施肥)，随机区组设计，每处理4个重复。结果表明，T5植株产量最高(4.65 kg/株)，单株果数最高(14.67个)。果实质量(390.33g)和TSS (12.180 Brix)以T11最高，而抗坏血酸含量(21.90 mg/100g果实质量)以T2最高。
{"title":"Performance of Dragon Fruit under Integrated Nutrient Management at Mizoram","authors":"R. C. Lalduhsangi, D. Mandal","doi":"10.22232/stj.2021.09.01.12","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.12","url":null,"abstract":"An investigation was performed during 2018-19 on newly planted red fleshed Dragon fruits spaced at 4mx2m with thirteen treatments viz. T1: Recommended dose of fertilizer (RDF) as 100% inorganic; T2: Farm Yard Manure (FYM) to supply 50% K + 50% RDF; T3: Vermi compost (VC) to supply 50% K + 50% RDF; T4: Neem Cake (NC) to supply 50% K + 50% RDF; T5: Farm Yard Manure (FYM) to supply 50% K + 50% RDF + Azotobacter (AZ) + Phosphate Solubilizing Bacteria (PSB) + Potash Solubilizing Bacteria (KSB); T6: VC to supply 50% K + 50% RDF+AZ+PSB+ KSB; T7: NC to supply 50% K + 50% RDF + AZ + PSB + KSB; T8: FYM to supply 25% K + VC to supply 25% K + 50% RDF + AZ + PSB + KSB; T9: FYM to supply 25% K + NC to supply 25% K + 50% RDF + AZ + PSB + KSB; T10: VC to supply 25% K + NC to supply 25% K+ 50% RDF + AZ +PSB + KSB; T11: FYM to supply 25% K + VC to supply 25% K + NC to supply 25% K + 25% RDF; T12: FYM to supply 25% K + VC to supply 25% K + NC to supply 25% K + 25% RDF + AZ + PSB + KSB; T13: Control (no fertilizer) and four replication per treatments arranged in Randomized Block Design. Results showed that plants at T5 had maximum yield (4.65 kg/vine) with maximum number of fruits per vine (14.67). However, the fruit weight (390.33g) and TSS (12.180 Brix) was found highest in T11 while, T2 had highest ascorbic acid content (21.90 mg/100g fruit weight).","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74605370","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.03
Sangam Kumar, J. Ghosh
In the present work, we have applied the analytical approach to obtain the equations of motion of a system of two cable connected artificial satellites under the effect of various perturbative forces of general nature. These perturbative forces are the earth’s shadow, solar radiation pressure, earth’s oblateness and the earth’s magnetic field. Our aim is to investigate the motion of the centre of mass of the two artificial cable connected satellite system in Keplerian elliptical orbit. We establish the equations of motion for the centre of mass of the system and also for the relative motion of the system. We obtain equations of motion in the rotating frame of reference as well as in Nechvile’s co-ordinate system. The cable under consideration is light, flexible, non-conducting and elastic in nature.
{"title":"Elastic Cable-Connected Satellites System Under Several Influences of General Nature: Equations of Motion in Elliptical Orbit","authors":"Sangam Kumar, J. Ghosh","doi":"10.22232/stj.2021.09.01.03","DOIUrl":"https://doi.org/10.22232/stj.2021.09.01.03","url":null,"abstract":"In the present work, we have applied the analytical approach to obtain the equations of motion of a system of two cable connected artificial satellites under the effect of various perturbative forces of general nature. These perturbative forces are the earth’s shadow, solar radiation pressure, earth’s oblateness and the earth’s magnetic field. Our aim is to investigate the motion of the centre of mass of the two artificial cable connected satellite system in Keplerian elliptical orbit. We establish the equations of motion for the centre of mass of the system and also for the relative motion of the system. We obtain equations of motion in the rotating frame of reference as well as in Nechvile’s co-ordinate system. The cable under consideration is light, flexible, non-conducting and elastic in nature.","PeriodicalId":22107,"journal":{"name":"Silpakorn University Science and Technology Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73887176","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 : 2021-01-01DOI: 10.22232/stj.2021.09.01.14
K. Singh, J. C. Zirthangmawia
The present investigation has been carried out for determining the net primary productivity (NPP) of the macrophytes found in Tamdil Lake, Mizoram. Both monthly and daily NPP of the macrophytes were evaluated for a period of two years. The findings clearly indicate that Alternanthera philoxeroides has the highest monthly NPP values (range: 2.18 to 24.42 gm–2 month–1; mean value 18.54 ± 2.12 gm–2 month–1), followed by Echinochloa stagnina (range: 0.91 to 10.94 gm–2 month–1; mean value 7.69 ± 1.97 gm–2 month–1), Eichhornia crassipes (range: 0.63 to 15.93 gm–2 month–1; mean value 12.74 ± 3.14 gm–2 month–1) and Kyllinga tenuifolia (range: 0.20 to 8.61 gm–2 month–1; mean value 7.02 ± 1.95 gm–2 month–1). This was followed progressively by Nymphaea pygmaea helvola with values of 1.08 to 17.11 gm–2 month–1. The monthly NPP of ‘other species’ ranged from 0.38 to 8.01 gm–2 month–1 (mean value 6.06 ± 2.08 gm–2 month–1). The monthly NPP of all the species (combined) reported a range of 0.89 to 119.82 gm–2 month–1 (mean value of 63.50 ± 2.99 gm–2 month–1). For estimation of daily NPP of the macrophytes, Alternanthera philoxeroides reported the peak daily NPP (range: 0.15 to 1.26 gm–2 day–1 with mean value of 0.87 ± 1.39 gm–2 day–1), followed closely by Eichhornia crassipes (range: 0.09 to 0.83 gm–2 day–1; mean value of 0.53 ± 1.42 gm–2 day–1, Nymphaea pygmaea helvola (range: 0.09 to 0.81 gm–2 day–1, mean value of 0.49 ± 2.13 gm–2 day–1), Echinochlo astagnina (range: 0.07 to 0.59 gm–2 day–1 with a mean value of 0.27 ± 0.98 gm–2 day–1. It has been found that the daily NPP of ‘other species’ ranged from 0.03 to 0.47 gm–2 day–1 with a mean value of 0.23 ± 0.92 gm–2 day–1.The daily NPP of all species (combined) ranged from 0.05 to 3.46 gm–2 day–1 with a mean value of 2.47 ± 2.28 gm–2 day–1. The macrophyte NPP varied significantly during the study period. Moderately higher daily NPP values of macrophytes indicates that the lake is approaching towards eutrophic status.
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