Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2024

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 31531 - 31560 of 32786

Full-Text Articles in Entire DC Network

Thailand's Never-Ending Pesticide Debate: Contested Future Sociotechnical Imaginaries Through A Relational Co-Productionist Lens, Henriette Erawan Kamphorst Jan 2024

Thailand's Never-Ending Pesticide Debate: Contested Future Sociotechnical Imaginaries Through A Relational Co-Productionist Lens, Henriette Erawan Kamphorst

Chulalongkorn University Theses and Dissertations (Chula ETD)

Since the introduction of the Green Revolution, the use of agrochemicals in Thai farming has sparked repeated contentious debates among local policy elites, addressing issues such as consumer health, farmer livelihoods, and environmental degradation. In 2019, this subject re-emerged on the policy agenda with the proposed ban of three key agrochemicals: Chlorpyrifos, Paraquat, and Glyphosate. In order to understand why the pesticide issue has remained on policy actors’ agendas for so long and still continues to be subject to ongoing debate, this research takes on a new perspective by adopting a relational co-productionist approach in the construction of contesting sociotechnical …


Private Motorcycle Users' Insights Toward Public Bus Adoption In Phnom Penh, Eangthay Tang Jan 2024

Private Motorcycle Users' Insights Toward Public Bus Adoption In Phnom Penh, Eangthay Tang

Chulalongkorn University Theses and Dissertations (Chula ETD)

As Phnom Penh experiences rapid population growth and economic expansion, traffic congestion has worsened, largely due to the increasing ownership of private motorcycles. Despite the introduction of public bus services, adoption remains low as concerns over service quality, limited coverage, and inadequate infrastructure deter motorcycle users from making the shift. This study investigates the behavioral intentions, preferences, and concerns of motorcycle users, specifically targeting university students, to understand how public bus services can be improved to encourage adoption. Data were collected in July 2024 from 457 university students who regularly use motorcycles, using a structured questionnaire across four Phnom Penh …


The Effects Of Uv-Radiation On The Removal Of Microplastics In Water Using Agglomeration-Micro-Flotation, Palot Srichonphaisarn Jan 2024

The Effects Of Uv-Radiation On The Removal Of Microplastics In Water Using Agglomeration-Micro-Flotation, Palot Srichonphaisarn

Chulalongkorn University Theses and Dissertations (Chula ETD)

Microplastics, plastic particles with diameter 1 micrometer to 5 millimeters, can disturb marine ecosystems due to their small size and surface properties which can be a carrier for hazardous matters. While wastewater treatment plants could remove some microplastics but some of them remain. Among the various removal techniques, flotation is a potential method due to the hydrophobic nature of microplastics. This study investigates the effects of ultraviolet radiation on the surface wettability of microplastics and removal efficiency of microplastics. The 6 types of microplastics were prepared from plastic boards. After the ultraviolet radiation, the results showed that ultraviolet radiation could …


Exploring Microplastics In Seawater And Zooplankton On The Eastern Coast Of Thailand: A Case Study In Phuket Province, Pensiri Akkajit, Sirima Yuankerd, Arsanchai Sukkuea Jan 2024

Exploring Microplastics In Seawater And Zooplankton On The Eastern Coast Of Thailand: A Case Study In Phuket Province, Pensiri Akkajit, Sirima Yuankerd, Arsanchai Sukkuea

Applied Environmental Research

Microplastics can accumulate in the environment and be transferred to different trophic levels, making them a concern for the aquatic food chain. As far as the researcher is aware, this study is the first to analyze microplastics in seawater and zooplankton along the eastern coastline of Phuket, Thailand, emphasizing their ecological significance. Analysis of the seawater samples identified 256 microplastic particles, with an average concentration of 52.6±21.4 and 32.6±30.3 particles L-1 for 20–300 µm and >300 µm classes, respectively. Four zooplankton species—copepod, fish larvae, bivalvia larvae, and shrimp larvae—were chosen for examination. The findings indicated that microplastics can move to …


Prevalence Of Microplastics In Coastal Area Of Samae San, Thailand And Its Possible Source, Siwanath Pangpunth, Sujaree Bureekul, Voranop Viyakarn Jan 2024

Prevalence Of Microplastics In Coastal Area Of Samae San, Thailand And Its Possible Source, Siwanath Pangpunth, Sujaree Bureekul, Voranop Viyakarn

Applied Environmental Research

This research explored the abundance, morphology, and polymer composition of microplastics (MPs) in various environmental samples within the Samae San subdistrict involving surface soil nearby the dumping site, road dust soil, beach sand and sediment in the area with distinct land- based activities. Dumping site soil exhibited the highest concentration in items per kg of dry weight at 93,734.3, followed by road dust soil (573.0 ± 583.7), beach sand (99.8 ± 75.3), and sediment (83.1 ± 50.4). Morphological traits revealed similarities between transparent fiber-shaped particles in beach sands and sediment, and those in nearby road dust soil, while green sheet-shaped …


Removal Of Chromium From Aqueous System Using Nanocellulose Prepared From Defoliated Terminalia Catappa Leaves, Lopamudra Digal, Jayashree Mohanty Jan 2024

Removal Of Chromium From Aqueous System Using Nanocellulose Prepared From Defoliated Terminalia Catappa Leaves, Lopamudra Digal, Jayashree Mohanty

Applied Environmental Research

Nanocellulose is considered as a sustainable and renewable nanomaterial due to its abundant availability, biodegradability and biocompatibility characteristics. The study demonstrates the synthesis of nanocellulose from defoliated leaves of the Tropical Almond (Terminalia catappa) plant, abundantly available residual plant biomass and its subsequent use in eliminating Cr(VI) from the water system. The study demonstrates the preparation of nanocellulose by chemical means, employing NaOH and H2SO4 as chemical agents. Characterization techniques like FTIR, SEM, and XRD were used to study the chemical composition and morphology of the resulting nanocellulose. The characterization studies confirm the formation of nanocellulose from the plant biomass. …


Exploring Google Earth Engine, Machine Learning, And Gis For Land Use Land Cover Change Detection In The Federal Capital Territory, Abuja, Between 2014 And 2023, Akus Kingsley Okoduwa, Chika Floyd Amaechi Jan 2024

Exploring Google Earth Engine, Machine Learning, And Gis For Land Use Land Cover Change Detection In The Federal Capital Territory, Abuja, Between 2014 And 2023, Akus Kingsley Okoduwa, Chika Floyd Amaechi

Applied Environmental Research

This study aims to visualize various land use land cover (LULC) classes, estimate the net change in LULC types between the years 2014 and 2023, and use transition mapping to track LULC transitions within waterbody, vegetation, bareland, and buildup to better understand how land use types change from one another. Google Earth Engine (GEE), Random Forest (RF), and Geographic Information System (GIS) were used for LULC classification and change detection. The dataset employed for this study is Landsat-8 with 30 m resolution, and four land cover classes, which include waterbody, vegetation, bareland, and buildup, were classified for this study using …


Spatiotemporal Patterns Of Land Surface Temperature, Urban Heat Island, And Potential Heat Stress Risk Areas Assessment For Tropical Inland City And Coastal City In Thailand, Thar Htet Aung, Sakpod Tongleamnak, Rasamee Suwanwerakamtorn Jan 2024

Spatiotemporal Patterns Of Land Surface Temperature, Urban Heat Island, And Potential Heat Stress Risk Areas Assessment For Tropical Inland City And Coastal City In Thailand, Thar Htet Aung, Sakpod Tongleamnak, Rasamee Suwanwerakamtorn

Applied Environmental Research

Global warming and rapid urban growth, compounded by the urban heat island (UHI) effect, are posing substantial challenges for urban populations and ecological well-being due to increased heat stress risks. This study aimed to analyze the spatiotemporal patterns of land surface temperature (LST), UHI, and potential heat stress risk areas (PHSRA) in two distinct cities, an inland city, Nakhon Ratchasima, and a coastal city, Si Racha, during the summer. Geoinformatics techniques and Crichton’s Risk Triangle method were employed, using updated demographic data and Sentinel-3 data from 2017 to 2022. The findings indicate that the inland city daytime average LST values …


Geospatial Modelling Of Flood Susceptibility Of The Calabar City, Cross River State, Nigeria, Joel Efiong, Eme Efiong, Oluyemi Akintoye, Ebin Inah, Obianuju Awan, Francis Ogban Jan 2024

Geospatial Modelling Of Flood Susceptibility Of The Calabar City, Cross River State, Nigeria, Joel Efiong, Eme Efiong, Oluyemi Akintoye, Ebin Inah, Obianuju Awan, Francis Ogban

Applied Environmental Research

Flooding remains a major environmental problem in many parts of the world including Nigeria, causing untold losses. This study modelled the flood susceptibility of Calabar Metropolis using frequency ratio and geographical information system (GIS). Direct field observation and key informant approaches were used to obtain 127 previous and current flood locations in the study area from which a database of historical flood occurrence was developed. Using the geostatistical analyst tool within a geographical information environment the flood locations were split into two parts in the ratio of 70:30 percent for the training and testing processes, respectively. Eight flood conditioning factors …


Market Failure And Censorship In The Marketplace Of Ideas, John P. Anderson, Jeremy Kidd Jan 2024

Market Failure And Censorship In The Marketplace Of Ideas, John P. Anderson, Jeremy Kidd

Oklahoma Law Review

No abstract provided.


Tesla, Let Me Fix My Car: The Right To Repair And The Need For A Balance Between Public And Private Enforcement, Emanuele S. Putrino Jan 2024

Tesla, Let Me Fix My Car: The Right To Repair And The Need For A Balance Between Public And Private Enforcement, Emanuele S. Putrino

Oklahoma Law Review

No abstract provided.


Prioritizing Oklahoma Mothers: Recommending Rehabilitation And Recovery Rather Than Punishment For Pregnancy, Alex B. Cox Jan 2024

Prioritizing Oklahoma Mothers: Recommending Rehabilitation And Recovery Rather Than Punishment For Pregnancy, Alex B. Cox

Oklahoma Law Review

No abstract provided.


Re/Descheduling Marijuana Through Administrative Action, Scott Bloomberg, Alexandra Harriman, Shane Pennington Jan 2024

Re/Descheduling Marijuana Through Administrative Action, Scott Bloomberg, Alexandra Harriman, Shane Pennington

Oklahoma Law Review

No abstract provided.


After Affirmative Action: Contextual Admissions And The Future Of African American Law School Enrollment, Nathan L. Bennett Fleming Jan 2024

After Affirmative Action: Contextual Admissions And The Future Of African American Law School Enrollment, Nathan L. Bennett Fleming

Oklahoma Law Review

No abstract provided.


The Nation’S Transfer Tax Regime And The Tax Gap, Jay A. Soled Jan 2024

The Nation’S Transfer Tax Regime And The Tax Gap, Jay A. Soled

Oklahoma Law Review

No abstract provided.


Interpolation, Litigation, And Copyright Confusion: How The Music Industry’S Influence Is Hindering Creativity, Hannah Edmondson Jan 2024

Interpolation, Litigation, And Copyright Confusion: How The Music Industry’S Influence Is Hindering Creativity, Hannah Edmondson

Oklahoma Law Review

No abstract provided.


“Facet” Or “Facets” Of Executive Privilege In Oklahoma? Vandelay’S Unclear Outcome, Nick Candido Jan 2024

“Facet” Or “Facets” Of Executive Privilege In Oklahoma? Vandelay’S Unclear Outcome, Nick Candido

Oklahoma Law Review

No abstract provided.


Copyright In Ai Training Data: A Human-Centered Approach, David W. Opderbeck Jan 2024

Copyright In Ai Training Data: A Human-Centered Approach, David W. Opderbeck

Oklahoma Law Review

No abstract provided.


Curing Terry’S Colorblindness, Ilan Friedmann-Grunstein Jan 2024

Curing Terry’S Colorblindness, Ilan Friedmann-Grunstein

Oklahoma Law Review

No abstract provided.


Taking Aim At Shotspotter: Gunshot Surveillance, The Fourth Amendment, And An Argument For Sonic Security, Emily A. Fogg Jan 2024

Taking Aim At Shotspotter: Gunshot Surveillance, The Fourth Amendment, And An Argument For Sonic Security, Emily A. Fogg

Oklahoma Law Review

No abstract provided.


On The Basis Of Pink: Finding A Balanced Approach To Addressing Gender-Based Price Discrimination On A National Level, Emily L. Brown Jan 2024

On The Basis Of Pink: Finding A Balanced Approach To Addressing Gender-Based Price Discrimination On A National Level, Emily L. Brown

Oklahoma Law Review

No abstract provided.


Balancing Efficiency And Authority: The Proper Role Of Magistrate Judges In Section 1782 Applications For International Discovery, Sophia Silvernail Jan 2024

Balancing Efficiency And Authority: The Proper Role Of Magistrate Judges In Section 1782 Applications For International Discovery, Sophia Silvernail

Oklahoma Law Review

No abstract provided.


The Right To Fail, Alexander A. Boni-Saenz Jan 2024

The Right To Fail, Alexander A. Boni-Saenz

Oklahoma Law Review

No abstract provided.


Intimate Relationships And Supported Decision Making, Leslie Francis Jan 2024

Intimate Relationships And Supported Decision Making, Leslie Francis

Oklahoma Law Review

No abstract provided.


Discrimination And Barriers: Abortion Access For Disabled Individuals After Dobbs, Jennifer L. Brinkley Jan 2024

Discrimination And Barriers: Abortion Access For Disabled Individuals After Dobbs, Jennifer L. Brinkley

Oklahoma Law Review

No abstract provided.


Chronic Conditions And Reproduction In A Post-Dobbs World, Allison M. Whelan Jan 2024

Chronic Conditions And Reproduction In A Post-Dobbs World, Allison M. Whelan

Oklahoma Law Review

No abstract provided.


Reproductive Federalism & Disabled Citizenship, Heather A. Swadley Jan 2024

Reproductive Federalism & Disabled Citizenship, Heather A. Swadley

Oklahoma Law Review

No abstract provided.


Mothers With Disabilities In The Workplace Post-Pandemic & Post-Dobbs, Nicole Buonocore Porter Jan 2024

Mothers With Disabilities In The Workplace Post-Pandemic & Post-Dobbs, Nicole Buonocore Porter

Oklahoma Law Review

No abstract provided.


Foreword: Rewriting The Script, Robyn M. Powell Jan 2024

Foreword: Rewriting The Script, Robyn M. Powell

Oklahoma Law Review

No abstract provided.


Fuzzy Digital Signature Scheme For Binary Noisy Strings With Respect To Hamming Distance, Ittanee Srikham Jan 2024

Fuzzy Digital Signature Scheme For Binary Noisy Strings With Respect To Hamming Distance, Ittanee Srikham

Chulalongkorn University Theses and Dissertations (Chula ETD)

One of the risks associated with public key infrastructure (PKI) pertains to the security of the user's private key. Given the imperative for stringent protection of this key, a proposed solution to mitigate this risk involves the utilization of biometric information. Although biometric information is fuzzy, it cannot be used directly as a cryptographic key. Thus, our investigation commenced into the exploration of ``Signature Scheme with a Fuzzy Private Key" by Takahashi et al. They introduced a new concept of digital signature called ``fuzzy signature" for real vectors with $L_{\infty}$ metric. A fuzzy signature is a signature scheme that uses …