Littérature scientifique sur le sujet « Tripura State »

The Tripuri tribe from the state of Tripura constitutes around 50 percent of the total tribal population and can be found in all eight districts of the state. The tribe follows its own culture and tradition in terms of marriage and other customary practices. This study investigates the role of gender in inheritance of property among the Tripuri tribe and how Tripuri women are excluded from ownership of property. It also attempts to discover how property ownership affects their income and position in the household. The study has been conducted in the districts of West Tripura and Dhalai. Focus Group Discussion and interview schedules are employed as methods for collection of data. Results show that while 20 out of 54 married women from rural areas of West Tripura have inherited property, only 2 out of 13 married women have inherited property in the urban area. In comparison with West Tripura, Dhalai features a low ratio among women in inheriting property (only 4 out of 38 married women). A few causes include low level of literacy, slow urbanization and less inter-community marriages. The reasons for not inheriting property include: a woman failing to live up to the concept of a ‘good sister’ in the brother’s eyes, son needs property to care for parents, cost of marriage is borne by brother or parents so no right to claim, and to avoid unnecessary conflict in the family. In this manner, societal perceptions prevent women from claiming the legitimate share of their ancestral property.

The author went on a fieldwork to the state of Tripura in September–October 2022. It was done as part of the Russian-Indian Anthropological Expedition of Paleoethnology Research Center and Timiryazev State Biology Museum. The main goal was to clarify and add to the data that had been collected during a bio-anthropological research of the Tripuri people in 2019. As a result, the author was able to conduct a questionnaire survey at various educational institutions in Agartala and Khumulwng, collecting a total of 405 questionnaires. The article gives a general summary of the work done to create the questionnaire and details how it was given to Indian students in a classroom environment. This article is based on a presentation given at a meeting of the Center for Indian Studies, RAS, on November 28, 2022.

An account of two species of Zeuxine Lindl. (Orchidaceae) occurring in Tripura is presented in this paper. Zeuxine longilabris (Lindl.) Benth. ex Hook.f. turned out to be a new distributional record for the state of Tripura.

Tripura is a north eastern hilly state of India, and so far only 27 species of Phytoseiidae have been reported from the state. During the present survey 250 specimens were collected belonging to seven new species, namely Euseius tripuraensis sp. nov., Euseius spontaneum sp. nov., Euseius tripurii sp. nov., Phytoseius birbikrami sp. nov., Phytoseius khowaiensis sp. nov., Phytoseius baramuracus sp. nov., and Typhlodromus (Anthoseius) sonajhuriae sp. nov.

The publication tells a story about a visit to the summer palace of the last rulers of the Tripura princely state, which is now a remarkable place of interest at the Tripura state in northeastern India. The palace is located on the island in the middle of the Rudrasagar Lake and can only be reached by boat. The current state of the palace is described as an object of cultural and historical heritage, and of a lake, classified as a nature conservation object of international importance. The opinions of experts on the measures to preserve the ecological balance in this part of the state of Tripura are given.

The state of Tripura of North-east India is a part of the Indo-Myanmar biodiversity hotspot and rich in unique biological flora and fauna. The present study is based on extensive surveys done by the author for a period of 5 years in different parts of North Tripura, North-east India. Here, I present a total of 21 genera and 51 species that are new additions to the butterfly fauna of Tripura. These new records include 18 species of Hesperiidae, 12 species of Lycaenidae, 17 species of Nymphalidae and 4 species of Pieridae. These records represent a 20.90% increase in the number of butterflies known from Tripura and update the existing checklist of butterfly fauna of the state.

The Eastern cat snake Boiga gocool (Gray, 1835) was recorded for the first time in the state of Tripura. The mildly venomous snake was documented by the authors in an opportunistic survey on 12 July 2020 near the Khowai river bridge, Khowai district, Tripura (24.064N & 91.596E; 129m). This new record will help in updating the status of the herpetofauna of Tripura, India.

Two new records of Calotes emma Gray, 1845, are reported from Srirampur and Homnpui in the state of Tripura, northeast India. These records are the first from Tripura. Present locality records extended the known distribution of C. emma in Southeast Asia.

The farmers are getting poorer despite the increase in the agricultural GDP. The profitability of agriculture has declined while the risk involved has increased.The changes in the policy en v iron ment a n d the market situation have not benefited the small and marginal farmers uniformly. Th e st u dy a tt emp ts t o project the regulated market of Tripura with different amenities available in the market vicinity. Alto gethe r 21 markets have been deliberately studied with twenty numbers of respondents from each market, and a total 420 numbers of responses are recorded; and a z-test has been applied to ascertain the relative importance of the specific variables. The market information, storing, weighing, sorting facilities are significantly aff ec te d on the marketing of agricultural produce in regulated markets of Tripura. In contrast, grading and transportation facilities have been found less affected by the regulated market system in Tri pura . Th e f i rst controlled market was created (1964). Following that, three markets were controlled in 1981, and sevente en markets were regulated in 1986. In Tripura, the government has take n se v e ral me a sure s t o e sta bli sh a controlled market. Despite these measures, there has been no discernible improvement in the state of Tripura's regulated markets

In spite of being an opening concept, innovation has fomented useful theoretical discussions. One of the most applied approaches is the `Triple Helix´ model, which identifies societies with higher ability of promoting innovative practices and environments as those where the helixes `Government´, `Universities´ and `Industry´ are better articulated, in a horizontal relation. What it follows is a work that aims to problematize that discussion to Brazilian context, pointing the existence of socio-political features which inhibit the interconnection among these main participants of the process. First, we take into account some aspects connected to Brazilian constitution, which reveals into a developmentalism logic. Later, we discuss the national technic-scientific activities, analyzing them based on Triple Helix theory and general theoretical contributions. And, as an attempt to delineate this relation more clearly, the next step was chosen looking at a more restrictive and specific object: the RHAE-Pesquisador na Empresa program, which confirmed the difficulties of a consolidation of this intended articulation among those helixes. In this way, we undertake a quite wide although needful sociological research, once the chosen thematic has a complex dynamics.
A inovação, apesar de ser um conceito ainda em aberto, tem fomentado discussões teóricas profícuas. Uma das abordagens mais utilizadas é o modelo da Tripla Hélice , que aponta as sociedades com maior capacidade de promover práticas e ambientes inovadores como aquelas onde as hélices Estado , Universidades e Empresas melhor se articulam, numa relação horizontal. Este trabalho procura problematizar essa discussão para o contexto brasileiro e aponta para a existência de características sócio-políticas que inibem a interconexão entre os três partícipes principais desse processo. Primeiramente, abordamos aspectos prenhes à constituição do Estado brasileiro, que desemboca na lógica desenvolvimentista. Posteriormente, discutimos o cenário das atividades tecno-científicas nacionais, analisando-as à luz da teoria da Tripla Hélice e de contribuições teóricas mais gerais. E, na tentativa de delinear mais claramente esta relação, na etapa seguinte foi escolhido como objeto mais restritivo e específico o programa RHAE-Pesquisador na Empresa que, por sua vez, confirmou as dificuldades da consolidação de uma pretendida articulação entre as hélices do sistema. Desse modo, empreendemos uma pesquisa sociológica bastante ampla, mas que fez-se necessária, em virtude da dinâmica complexa inerente à temática escolhida.

Tee present research focuses on seismic hazard studies for the states of Tripura and Mizoram in the North-East India with taking into account the complex sesismotectonic characteristics of the region. This area is more prone to earthquake hazard due to complex subsurface geology, peculiar topographical distribution, continuous crustal deformation due to the under thrusting of Indian and the Eurasian plates, a possible seismic gap, and many active intraplate sources identified within this region. The study area encompasses major seismic source zones such as Indo Burmese Range (IBR), Shillong Plateau (SP), Eastern Himalayan arc (EH), Bengal Basin (BB), Mishmi Thrust (MT) and Naga Thrust (NT). Five historical earthquakes of magnitude Mw>8 have been listed in the study area and 15 events of magnitude Mw>7 have occurred in last 100 years. Indian seismic code BIS-1893-2002 places the study area with a high level of seismic hazard in the country (i.e. seismic zone V). More than 60% of the area is hilly steep-terrain in nature and the altitude varies from 0 to 3000 meters. Recent works have located a seismic gap, known as the Assam gap since 1950 between the EH, SP, and IBR with the Eurasian plate. Various researchers have estimated the return period, and a large size earthquake is expected in this region any time in future. The area is also highly prone to liquefaction, since rivers in Tripura (Gomati, Howrah, Dhalai, Manu, Bijay, Jeri, Feni) and the rivers in Mizoram (Chhimtuipui, Tlawng, Tut, Tuirial and Tuivawl etc.) are scattered throughout the study area where soil deposits are of sedimentary type. In 2011, both the states together have experienced 37 earthquakes (including foreshocks and aftershocks) with magnitudes ranging from 2.9 to 6.9. Of these events, there were 23 earthquakes (M>4) of magnitudes M6.4 (Feb 4th 2011), M6.7 (March 24th 2011), M6.9 (Sept.18th 2011), M6.4 (October 30th 2011), M6.9 (Dec 13th 2011), M5.8 (Nov 21st 2011), M5 (Aug 18th 2011), M4.9 (July 28th 2011), M4.6 (Dec 15th 2011), M4.6 (Jan 21st 2011), M4.5 (Dec 9th 2011), M4.5 (Oct 21th 2011), M4.5 (Oct 17th 2011), M4.5 (Sept 18th 2011), M4.3 (Oct 10th 2011), M4.3 (Sept 22nd 2011), M4.3 (April 4th 2011), M4.2 (Sept 9th 2011), M4.2 (Sept 18th 2011), M4.1 (April 29th 2011), M4.1 (Feb 22nd 2011), M4 (June 9th 2011), and M4 (Dec 2nd 2011) which occurred within this region [source: IMD (Indian Metrological Department), India]. The earthquake (M6.9) that occurred on Sept. 18th 2011 is known as the Sikkim earthquake, and it caused immense destruction including building collapse, landslides, causalities, disrupted connectivity by road damages and other infrastructural damages in Sikkim state as well as the entire North-East India. In the cities of Agartala and Aizawl of Tripura and Mizoram, construction of high rise building is highly restricted by the Government. Being the capital city, many modern infrastructures are still pending for growth of the city planning. Although many researchers have studied and reported about the status of seismicity in North-East Region of India, very few detailed studies have been carried out in this region except Guwahati, Sikkim and Manipur where almost the whole of the study area is highly vulnerable to severe shaking, amplification, liquefaction, and landslide. From the available literature, no specific study exists for Tripura and Mizoram till date. In the present research, seismic hazard assessment has been performed based on spatial-temporal distribution of seismicity and fault rupture characteristics of the region. The seismic events were collected from regions covering about 500 km from the political boundary of the study area. The earthquake data were collected from various national and international seismological agencies such as the IMD, Geological Survey of India (GSI), United State Geological Survey (USGS), and International Seismological Centre (ISC) etc. As the collected events were in different magnitude scales, all the events were homogenized to a unified moment magnitude scale using recent magnitude conversion relations (region specific) developed by the authors for North-East Region of India. The dependent events (foreshocks and aftershocks) were removed using declustering algorithm and in total 3251 declustered events (main shocks) were identified in the study area since 1731 to 2011. The data set contains 825 events of MW < 4, 1279 events of MW from 4 to 4.9, 996 events MW from 5 to 5.9, 131 events MW from 6 to 6.9, 15 events MW from 7 to 7.9 and 5 events MW ≥8. The statistical analysis was carried out for data completeness (Stepp, 1972). The whole region was divided into six seismic source zones based on the updated seismicity characteristics, fault rupture mechanism, size of earthquake magnitude and the epicentral depth. Separate catalogs were used for each zone, and seismicity parameters a and b were estimated for each source zone and other necessary parameters such as mean magnitude (Mmean), Mmax, Mmin, Mc and recurrence periods were also estimated. Toposheets/vector maps of the study area were collected and seismic sources were identified and characterized as line, point, and areal sources. Linear seismic sources were identified from the Seismotectonic atlas (SEISAT, 2000) published by the GSI, in addition to the source details collected from available literature and remote sensing images. The SEISAT map contains 43 maps presented in 42 sheets covering entire India and adjacent countries with 1:1million scale. Sheets representing the features of the study area were scanned, digitized and georeferenced using MapInfo 10.0 version. After this, tectonic features and seismicity events were superimposed on the map of the study area to prepare a Seismotectonic Map with a scale of 1:1million. In seismic hazard assessment, a state of art well known methodologies (deterministic and probabilistic) was used. In deterministic seismic hazard analysis (DSHA) procedure, hazard assessment is based on the minimum distance between sources to site considering the maximum magnitude occurred at each source. In hazard estimation procedure a lot of uncertainties are involved, which can be explained by probabilistic seismic hazard analysis (PSHA) procedure related to the source, magnitude, distance, and local site conditions. The attenuation relations proposed by Atkinson and Boore (2003), and Gupta (2010) are used in this analysis. Because in this region two type activities are mostly observed, regions such as SP, and EH are under plate boundary zone whereas IBR is under subduction process. These equations (GMPEs) were validated with the observed PGA (Peak ground acceleration) values before use in the hazard evaluation. The hazard curves for all six major sources were prepared and compiled to get the total hazard curve which represents the cumulative hazard of all sources. Evaluation of PGA, Sa (0.2s and 1.0s) parameters at bedrock level were estimated considering a grid size of 5 km x 5 km, and spectral acceleration values corresponding to a certain level of probability (2% and 10%) were done to develop uniform hazard spectrum (UHS) for both the cities (Agartala and Aizawl). To carry out the seismic microzonation of Agartala and Aizawl cities, a detailed study using geotechnical and geophysical data has been carried out for site characterization and evaluation of site response according to NEHRP (National Earthquake Hazard Response Program) soil classifications (A, B, C, D, and E-type). Seismic site characterization, which is the basic requirement for seismic microzonation and site response studies of an area. Site characterization helps to have the idea about the average dynamic behavior of soil deposits, and thus helps to evaluate the surface level response. A series of geophysical tests at selected locations have been conducted using multichannel analysis of surface waves (MASW) technique, which is an advanced method to obtain direct shear wave velocity profiles from in situ measurements for both the cities. Based on the present study a major part of Agartala city falls under site class D, very few portions come under site class E. On the other hand, Aizawl city comes under site class C. Next, a detailed site response analysis has been carried out for both the cities. This study addresses the influence of local geology and soil conditions on incoming ground motion. Subsurface geotechnical (SPT) and geophysical (MASW) data have been obtained and used to estimate surface level response. The vulnerable seismic source has been identified based on DSHA. Due to the lack of strong motion time history of the study area, synthetic ground motion time histories have been generated using point source seismological model (Boore 2003) at bedrock level based on fault rupture parameters such as stress drop, quality factor, frequency range, magnitude, hypocentral distance etc. Dynamic properties such as the shear modulus (G) and damping ratios (ζ) have been evaluated from the soil properties obtained from SPT bore log data collected from different agencies such as PWD (Public works Department), and Urban Development Dept. of the State Government, in situ shear wave velocity has been obtained from MASW survey in different locations, and following this, a site response analysis has been carried out using SHAKE-2000 to calculate the responses at the ground surface in combination of different magnitudes, distances and epicentral depth for a particular site class. An amplification factor was estimated as the ratio of the PGA at the ground surface to the PGA at bedrock level, a regression analysis was carried out to evaluate period dependant site coefficients, and hence, the period dependant hazard impact on the ground surface could be calculated to obtain the spatial variation of PGA over the study area. Further, liquefaction potential of the site (Agartala) was also evaluated using available SPT bore log data collected and using presently estimated surface level PGA. The results are presented in the form of liquefaction hazard map representing as a Factor of safety (FS) against liquefaction with various depths such as 1.5m, 10m, and 15m respectively. It has been seen that Agartala city shows highly prone to liquefaction even up to 15 m depth. Hence, site specific study is highly recommended for implementing any important project. The liquefaction hazard assessment could not be conducted for the Aizawl city because of non availability of the SPT-N data, however, the city stands on hills/mountains, and therefore, such a study is not applicable in this area. Further, seismic microzonation maps for both the cities have been prepared considering Analytical Hierarchy Process (AHP) which support to the Eigen value properties of the system. Two types of hazard maps have been developed, one using deterministic and another using the probabilistic seismic microzonation maps. These maps can be directly used as inputs for earthquake resistant design, and disaster mitigation planning of the study area. However, an investigation has also been made in forecasting a major earthquake (Mw>6) in North-East India using several probabilistic models such as Gamma, Weibull and lognormal models. IBR and EH show a high probability of occurrences in the next 5 years (i.e. 2013-2018) with >90% probability.

Tee present research focuses on seismic hazard studies for the states of Tripura and Mizoram in the North-East India with taking into account the complex sesismotectonic characteristics of the region. This area is more prone to earthquake hazard due to complex subsurface geology, peculiar topographical distribution, continuous crustal deformation due to the under thrusting of Indian and the Eurasian plates, a possible seismic gap, and many active intraplate sources identified within this region. The study area encompasses major seismic source zones such as Indo Burmese Range (IBR), Shillong Plateau (SP), Eastern Himalayan arc (EH), Bengal Basin (BB), Mishmi Thrust (MT) and Naga Thrust (NT). Five historical earthquakes of magnitude Mw>8 have been listed in the study area and 15 events of magnitude Mw>7 have occurred in last 100 years. Indian seismic code BIS-1893-2002 places the study area with a high level of seismic hazard in the country (i.e. seismic zone V). More than 60% of the area is hilly steep-terrain in nature and the altitude varies from 0 to 3000 meters. Recent works have located a seismic gap, known as the Assam gap since 1950 between the EH, SP, and IBR with the Eurasian plate. Various researchers have estimated the return period, and a large size earthquake is expected in this region any time in future. The area is also highly prone to liquefaction, since rivers in Tripura (Gomati, Howrah, Dhalai, Manu, Bijay, Jeri, Feni) and the rivers in Mizoram (Chhimtuipui, Tlawng, Tut, Tuirial and Tuivawl etc.) are scattered throughout the study area where soil deposits are of sedimentary type. In 2011, both the states together have experienced 37 earthquakes (including foreshocks and aftershocks) with magnitudes ranging from 2.9 to 6.9. Of these events, there were 23 earthquakes (M>4) of magnitudes M6.4 (Feb 4th 2011), M6.7 (March 24th 2011), M6.9 (Sept.18th 2011), M6.4 (October 30th 2011), M6.9 (Dec 13th 2011), M5.8 (Nov 21st 2011), M5 (Aug 18th 2011), M4.9 (July 28th 2011), M4.6 (Dec 15th 2011), M4.6 (Jan 21st 2011), M4.5 (Dec 9th 2011), M4.5 (Oct 21th 2011), M4.5 (Oct 17th 2011), M4.5 (Sept 18th 2011), M4.3 (Oct 10th 2011), M4.3 (Sept 22nd 2011), M4.3 (April 4th 2011), M4.2 (Sept 9th 2011), M4.2 (Sept 18th 2011), M4.1 (April 29th 2011), M4.1 (Feb 22nd 2011), M4 (June 9th 2011), and M4 (Dec 2nd 2011) which occurred within this region [source: IMD (Indian Metrological Department), India]. The earthquake (M6.9) that occurred on Sept. 18th 2011 is known as the Sikkim earthquake, and it caused immense destruction including building collapse, landslides, causalities, disrupted connectivity by road damages and other infrastructural damages in Sikkim state as well as the entire North-East India. In the cities of Agartala and Aizawl of Tripura and Mizoram, construction of high rise building is highly restricted by the Government. Being the capital city, many modern infrastructures are still pending for growth of the city planning. Although many researchers have studied and reported about the status of seismicity in North-East Region of India, very few detailed studies have been carried out in this region except Guwahati, Sikkim and Manipur where almost the whole of the study area is highly vulnerable to severe shaking, amplification, liquefaction, and landslide. From the available literature, no specific study exists for Tripura and Mizoram till date. In the present research, seismic hazard assessment has been performed based on spatial-temporal distribution of seismicity and fault rupture characteristics of the region. The seismic events were collected from regions covering about 500 km from the political boundary of the study area. The earthquake data were collected from various national and international seismological agencies such as the IMD, Geological Survey of India (GSI), United State Geological Survey (USGS), and International Seismological Centre (ISC) etc. As the collected events were in different magnitude scales, all the events were homogenized to a unified moment magnitude scale using recent magnitude conversion relations (region specific) developed by the authors for North-East Region of India. The dependent events (foreshocks and aftershocks) were removed using declustering algorithm and in total 3251 declustered events (main shocks) were identified in the study area since 1731 to 2011. The data set contains 825 events of MW < 4, 1279 events of MW from 4 to 4.9, 996 events MW from 5 to 5.9, 131 events MW from 6 to 6.9, 15 events MW from 7 to 7.9 and 5 events MW ≥8. The statistical analysis was carried out for data completeness (Stepp, 1972). The whole region was divided into six seismic source zones based on the updated seismicity characteristics, fault rupture mechanism, size of earthquake magnitude and the epicentral depth. Separate catalogs were used for each zone, and seismicity parameters a and b were estimated for each source zone and other necessary parameters such as mean magnitude (Mmean), Mmax, Mmin, Mc and recurrence periods were also estimated. Toposheets/vector maps of the study area were collected and seismic sources were identified and characterized as line, point, and areal sources. Linear seismic sources were identified from the Seismotectonic atlas (SEISAT, 2000) published by the GSI, in addition to the source details collected from available literature and remote sensing images. The SEISAT map contains 43 maps presented in 42 sheets covering entire India and adjacent countries with 1:1million scale. Sheets representing the features of the study area were scanned, digitized and georeferenced using MapInfo 10.0 version. After this, tectonic features and seismicity events were superimposed on the map of the study area to prepare a Seismotectonic Map with a scale of 1:1million. In seismic hazard assessment, a state of art well known methodologies (deterministic and probabilistic) was used. In deterministic seismic hazard analysis (DSHA) procedure, hazard assessment is based on the minimum distance between sources to site considering the maximum magnitude occurred at each source. In hazard estimation procedure a lot of uncertainties are involved, which can be explained by probabilistic seismic hazard analysis (PSHA) procedure related to the source, magnitude, distance, and local site conditions. The attenuation relations proposed by Atkinson and Boore (2003), and Gupta (2010) are used in this analysis. Because in this region two type activities are mostly observed, regions such as SP, and EH are under plate boundary zone whereas IBR is under subduction process. These equations (GMPEs) were validated with the observed PGA (Peak ground acceleration) values before use in the hazard evaluation. The hazard curves for all six major sources were prepared and compiled to get the total hazard curve which represents the cumulative hazard of all sources. Evaluation of PGA, Sa (0.2s and 1.0s) parameters at bedrock level were estimated considering a grid size of 5 km x 5 km, and spectral acceleration values corresponding to a certain level of probability (2% and 10%) were done to develop uniform hazard spectrum (UHS) for both the cities (Agartala and Aizawl). To carry out the seismic microzonation of Agartala and Aizawl cities, a detailed study using geotechnical and geophysical data has been carried out for site characterization and evaluation of site response according to NEHRP (National Earthquake Hazard Response Program) soil classifications (A, B, C, D, and E-type). Seismic site characterization, which is the basic requirement for seismic microzonation and site response studies of an area. Site characterization helps to have the idea about the average dynamic behavior of soil deposits, and thus helps to evaluate the surface level response. A series of geophysical tests at selected locations have been conducted using multichannel analysis of surface waves (MASW) technique, which is an advanced method to obtain direct shear wave velocity profiles from in situ measurements for both the cities. Based on the present study a major part of Agartala city falls under site class D, very few portions come under site class E. On the other hand, Aizawl city comes under site class C. Next, a detailed site response analysis has been carried out for both the cities. This study addresses the influence of local geology and soil conditions on incoming ground motion. Subsurface geotechnical (SPT) and geophysical (MASW) data have been obtained and used to estimate surface level response. The vulnerable seismic source has been identified based on DSHA. Due to the lack of strong motion time history of the study area, synthetic ground motion time histories have been generated using point source seismological model (Boore 2003) at bedrock level based on fault rupture parameters such as stress drop, quality factor, frequency range, magnitude, hypocentral distance etc. Dynamic properties such as the shear modulus (G) and damping ratios (ζ) have been evaluated from the soil properties obtained from SPT bore log data collected from different agencies such as PWD (Public works Department), and Urban Development Dept. of the State Government, in situ shear wave velocity has been obtained from MASW survey in different locations, and following this, a site response analysis has been carried out using SHAKE-2000 to calculate the responses at the ground surface in combination of different magnitudes, distances and epicentral depth for a particular site class. An amplification factor was estimated as the ratio of the PGA at the ground surface to the PGA at bedrock level, a regression analysis was carried out to evaluate period dependant site coefficients, and hence, the period dependant hazard impact on the ground surface could be calculated to obtain the spatial variation of PGA over the study area. Further, liquefaction potential of the site (Agartala) was also evaluated using available SPT bore log data collected and using presently estimated surface level PGA. The results are presented in the form of liquefaction hazard map representing as a Factor of safety (FS) against liquefaction with various depths such as 1.5m, 10m, and 15m respectively. It has been seen that Agartala city shows highly prone to liquefaction even up to 15 m depth. Hence, site specific study is highly recommended for implementing any important project. The liquefaction hazard assessment could not be conducted for the Aizawl city because of non availability of the SPT-N data, however, the city stands on hills/mountains, and therefore, such a study is not applicable in this area. Further, seismic microzonation maps for both the cities have been prepared considering Analytical Hierarchy Process (AHP) which support to the Eigen value properties of the system. Two types of hazard maps have been developed, one using deterministic and another using the probabilistic seismic microzonation maps. These maps can be directly used as inputs for earthquake resistant design, and disaster mitigation planning of the study area. However, an investigation has also been made in forecasting a major earthquake (Mw>6) in North-East India using several probabilistic models such as Gamma, Weibull and lognormal models. IBR and EH show a high probability of occurrences in the next 5 years (i.e. 2013-2018) with >90% probability.

This chapter offers a non-Eurocentric history of democracy by studying the communities who traditionally pursued shifting cultivation in the hilly landscape of Tripura and are classified today as Scheduled Tribes. In precolonial Tripura, power was never monopolized by the monarch or a narrow nobility. Large military and administrative circles, and the wider populace, regularly intervened in high politics, constructing a ‘polycracy’. Tripura’s state chronicle Rajmala portrayed ‘the people’ in regular deliberation and revolutionary action, including in selecting and deposing rulers. The kingship and the polycracy interacted to give birth to modern constitutionalism in interwar Tripura, followed in the late 1940s by a Tripuri left-democratic revolution. Tripuri polycracy conversed with modern Western socialism to nourish an indigenous democratic tradition of popular politics that shapes the region until today. Tripura thus exemplifies how Indian democracy has been shaped as much by precolonial-origin collective politics and political thinking, as by modern Western constitutionalism and parliamentarianism.

The South Asia Sub-regional Arrangement (SASA) aims to promote trade and tourism in landlocked South Asian nations, fostering interpersonal connections and economic growth. The Act East Policy and SASA have stimulated connectivity development, SEZ creation, and economic corridor development in three geographically isolated Indian states, enhancing tourism infrastructure. The SASEC initiative aids in trade and tourism growth in geographically isolated regions, suggesting that countries with trade facilitation advantages can effectively boost tourism. Bangladesh's unique trade balance, both positive with Tripura and negative with India, may encourage future bilateral relations, especially with Tripura. The test results show a surge in foreign tourist arrivals, typically leading to the growth of Tripura's net state domestic product and per capita income. The study explores the link between trade facilitation initiatives and tourism promotion in Tripura and suggests strategies for their implementation.

Plants are an important source of modern medicine. Ethnic communities/rural people largely depend on the folk medicinal system that is not documented systemically but could play a key role in drug discovery. Ethnobotanical surveys are an important tool to extract such knowledge from people transmitted mostly verbally from generation to generation. Tripura is a small state in India but is considered a storehouse of important medicinal plants. Different tribes and local people of Tripura use numerous plants in their daily life to meet medicinal needs. Several ethnobotanical surveys were conducted in Tripura and documented the medicinal use of plants. Pain, inflammation and wound are a few common problems associated with our daily life. This chapter focused on the traditional medicinal plants used in the treatment of pain, inflammation and wound by the people of Tripura.

Soil quality can be defined as the fitness of a specific kind of soil to function within its capacity and within natural or managed ecosystem boundaries to sustain plant and animal productivity, maintain or enhance water and air quality, and support human health and habitation. Soil is one of the common factors that bring all agriculture together. It can also be used to describe more complex soil characteristics such as soil organic matter, nutrient amounts, soil structure, etc. The soil quality of Tripura state where ONGC has established numerous exploratory and development wells for exploration of natural gas has been studied and presented in this chapter.

Digital inclusion in banking services was drafted to provide fast and uninterrupted services to a broad pool of customers with an aim to extend financial services to unprivileged groups. Competitive edge associated made it a vibrant policy for bankers across the state with varying degrees of application to suit the customer needs. The present study explores the extent of digital banking interface help improve the status of rural banking in Tripura on the basis of secondary data. Taking cue from four CRISIL Inclusix in view (i.e., branch penetration, deposit penetration, credit penetration, insurance penetration), results are indicative of Tripura's progress in rural front becoming one of the best performing state among NESs. The study again specifies that proper policy measures, vis-a-vis its implementation could place the state amongst top five digitally inclusive states in India and also promote much desired cashless economy and transparency among others.

Tripura, one of the smallest states of India, is very famous to the people of India because of its own hidden treasures and the atmospheric beauty of nature. Various temple architecture, stone and metal sculptures which have been scattered all over the state made her historically significant, but due to proper expose it still remains in darkness. Globalization and emergence of technology nowadays vastly helps tour lovers to choose their destinations. Observing the present scenario, in this chapter the researcher explores and introduces the richness and the hidden wealth of history of Tripura through a bird's eye view of the Pilak Monastery to the outer world.

Ever-increasing crude oil prices across the globe coupled with high cost and sustainability concerns attached to hydro power generation led to exploring new avenues for switching to alternate/renewable energy than ever before. The present study sheds light on the prospect of promoting cow dung as an alternative source of energy with respect to tiny mountainous state Tripura and its role on socioeconomic development. Available literature provides the impression that energy from cow dung can be produced from biogas or by burning the dried dung to a power steam engine. The state has been blessed with cow dung across its rural centers, which are primarily used as bio-manures for agriculture and adjoining sectors. Centralized mobilization of these resources for energy generation have already paid rich dividends for states like Tamilnadu, Chattisgarh, Jharkhand, and other parts of India. This study examines the viability and challenges associated with power generation from cow dung for Tripura and presents a case for its adoption.