bluuebunny/crossref_metadata_2025_split huggingface dataset:
Applications of deep learning framework and localization to intelligent radio spectrum monitoring
Authors:   , Le Truong 
Published: September 2023

In this thesis, the author proposed an intelligent radio spectrum monitoring system with implemented deep learning framework. Deep learning is a powerful method to handle hard tasks automatically. The system uses the RTL-SDR USB dongle as the sensor to collect the spectrum data. This dongle is a low-cost device that can measure the signal from 500kHz to 1700MHz. The maximum bandwidth of measurement is 2MHz. The main functions of this system are to collect the spectrum data and then detect the representation signals and extract their characteristics, such as bandwidth, center frequency, modulation type, and capacity. The modulation classification task was done with the deep learning Long Short-Term Memory model. The model can achieve up to 92% accuracy in the validated dataset. Compared to the result in the paper Convolutional radio modulation recognition networks O’Shea, T. J., Corgan, J., & Clancy, T. C. (2016), the model shows higher accuracy (92% vs. 87.4%). In addition, the model can run with a wide range of Signal-to-Noise Ratio values, while the other research papers often analyzes with a specific value. Finally, an algorithm of localization was implemented in the system in order to find the position of the unwanted or illegal signals. The average error of the algorithm in this thesis is 450m.
Why is the third principal component of the yield curve important: A point of view from reverse stress test on credit portfolio
Authors:   , Ritpornnarong Phanuwat 
Published: September 2023

The focus of this study is to analyze the shape of the yield curve on credit portfolios during crises, specifically those that are exposed to both interest rate and credit risks. To achieve this, We utilized a reverse stress test (RST) and macroeconomic measures (such as GDP and U.S risk-free yields) from the period of 1981 to 2014 to estimate mathematical models. We then utilized a Monte Carlo simulation to determine the most likely scenario for the measures if the portfolio value reaches a pre-specified threshold.

The researchers discovered that the shape of the stressed yield curves varied depending on whether or not the third principal component of the yield curve was included in the analysis. They found that stressed credit portfolios with maturities ranging from 0.5 to 3 years exhibited a humped shape on yields within that range when the third principal component was included. As stress levels increased, this humped shape became more pronounced, indicating that the stressed credit portfolio's value was impacted by rising yields.

This study's findings have significant implications for financial institutions as they consider the third principal component in their asset-liability management for portfolios with maturities between 0.5 and 3 years.
Development and validation of smartphone nutrition application for supporting dietetic professional practice
Authors:   , Tantichaiyakul Thanasak 
Published: September 2023

Advancements in technology have allowed for the development of applications for supporting the nutrition care process. The objectives of this study were to develop and validate a nutrition application incorporating the food and nutrtion databases, and to assess the satisfaction of dietitians toward the developed application. Seventy registered dietitians were recruited to evaluate two sets of the food photographs prepared based on Thai food exchange list (Thai FEL) and Thai food based dietary guideline (Thai FBDG) for three consecutive days. The participants estimated and calculated manually using calculators, following by using the application. The participants’ satisfaction indicated acceptance (overall score = 4.43 ± 0.67) and positive impressions toward the application. Both food exchange lists based NDPro applcations resulted in a significant reduction in time usage (p < 0.01). Furthermore, the application could analyze the data accurately indicating its performance as acceptable in terms of reliability and stability. Additionally, the results of energy and macronutrient contents from the Thai FEL based application also significantly differed from those calculated manually (p < 0.05) with 5% difference in fat and 7 - 8% difference in carbohydrate and energy. However, for the Thai FBDG based application, it was required to modify the representative values of some food groups for improving reliability.
Geomorphological change of the upper Yom river in Phrae province
Authors:   , Nan Kakkhanang 
Published: September 2023

Yom River is the main tributary of the Chao Phraya River; the upper Yom River flows through Phrae Province. This research selected the upper Yom River because of meander processing in an active basin, which rapidly migrates and changes landforms all the time, The object of this research is to study geomorphological change, thickness and behavior of the upper Yom River in Phrae Province.

By assessing aerial photographs and satellite images from 1954 to 2019, the researchers were able to interpret the geological changes that occurred over the past 65 years. The study identified several geomorphological changes from channel migration which can be obvious on maps. The upper and middle sections of the research site, characterized by a flat and wider floodplain area, exhibited more remnants of cut-offs compared to the lower section. To compare the changes, five geomorphic criteria were used: channel width (W), channel length (L), sinuosity index (SI), radius of curvature (Rc), and channel migrations. The width (W) underwent significant alterations due to increased bank deposition resulting from human activities and deforestation. Changes in land use were found to have various impacts on runoff and sediment supply. The channel's length and sinuosity index (SI) showed a decreasing trend, indicating frequent cut-offs at the neck and chute during floods. Erosion rates were observed to be lower in the upper and middle parts of the Yom River due to previous cut-offs, while the lower portion exhibited active bending as evidenced by migration rates versus Rc/W values. Lower Rc/W values corresponded to slower rates of bend migration.

The sedimentology and geophysics field investigation from different landforms. Grain size analysis revealed sediment types including mud, sandy mud, muddy sand, sand, gravelly sand, and sandy gravel in point bars and paleo-channels, and mud and sandy mud in floodplains and meander scars. ERT and GPR analyses provided insights into the lithological characteristics of the study area. The ERT profiles displayed visible vertical and horizontal changes in fluvial deposits, which ranged in thickness from 5 to 20 meters, similar to the floodplain, point bar, and paleo-channel. Additionally, five types of radar facies were observed in river deposits: Continuous (Parallel), Inclined, Concaved-up (Channel fill), Chaotic, and Reflection Free.

This study's comprehensive analysis of various data sources and techniques shed light on the geomorphological changes that have occurred in the upper Yom River over the past decades. The findings also contribute to our understanding of the Yom River behaviors, landform evolution, the sediments and the paleochannels' thickness.
Remote sensing and luminescence dating of archaeological sites in Buriram province, northeastern Thailand
Authors:   , Khamsiri Sutthikan 
Published: September 2023

This research aims to apply remote sensing and luminescence dating to study archaeological sites in Buriram Province, Northeastern Thailand. There are three main objectives including 1) to model the ancient path from the mountain passes along the Dângrêk mountain to ancient community on Angkor Highland or Northeast Thailand, 2) to directly date slag from the ancient iron smelting site at Ban Sai To 7, and 3) determine the terminal age of Ban Sai To 7 site using technical ceramics.

Firstly, the results of the GIS-based least cost path (LCP) route, using topographic factors, show that Ta Muen, Sai Ta Ku, and Krang are the most suitable for transportation between the Khorat plateau and present Cambodia. These results are consistent with archaeological evidence i.e., Dharmasalas. Most Khmer monuments are located in the vicinity of LCP routes. Moreover, the LCP route of Ta Muen is significant with the location of the ancient industrial zone in Ban Kruat District. However, most ancient smelting sites were in the Iron Age, although they were assumed to be active during the Khmer period when compared with the relative findings.

The major challenge of archaeometallurgy is the limitation of suitable sample for the scientific dating method. Therefore, the second is to investigate the absolute date of slag in the ancient iron-smelting site at Ban Sai Tho 7 by luminescence dating. The result slag shows the luminescence signal. Therefore, luminescence dating is an effective method to directly date slag. Moreover, the results show that the terminal activity of this site is 140 years ago. This result is in good agreement with the terminal period of ancient iron smelting in Cambodia.

Finally, the dates of technical ceramics i.e., furnace and tuyere fragments in the slag heap at Ban Sai Tho 7, show that there were at least two different periods of furnace construction including 360-370 years and 1000-1110 years ago. It is indicated that there are many phrases of smelting in one heap. When comparing the ages between slags and technical ceramics, the results of these two materials are in good agreement. Moreover, this finding shows that the large size of the ancient iron-smelting site at Ban Sai Tho 7 came from a long operational lifespan rather than a large operation in a short period. The route of ancient transportation is significant with the location of ancient industrial zone especially ancient iron-smelting sites that had been since the Iron Age, the Khmer Period and the post-Khmer period.
The potential risk and occupational exposure of pesticides among rice farmers in delta Ayeyarwady division, Myanmar
Authors:   , Khin Moe 
Published: September 2023

This study aims to assess the potential risk and occupational exposure of pesticides among rice farmers in the Delta Ayeyarwady Region, Myanmar. A cross-sectional study was carried out with 454 rice farmers from March-April 2022. Data collection was done through face-to-face interviews used with a semi-structured questionnaire. The study showed that the mean age of farmers was 44.36 years old while the range was 16 and 74 years old. Rice farmers' average weight (± standard deviation) was 56.86 (± 7.30) kg. In this study, over two-thirds of the rice farmers (77 %) had a moderate level of knowledge regarding environmental awareness related to pesticides, exposure, and toxicity of pesticides. Likewise, almost rice farmers in the participants (94 %) had a moderate practice level regarding pesticide handling, management, storage, and hygiene. Regarding potential of risk assessment, in the cross-sectional study of rice farmers in Ayeyarwady, (87%) of the respondents applied insecticides while 73 % and 29% were herbicides and fungicides users, accordingly. For determination of health risk assessment, inhaling a large amount of organophosphate group (acephate, chlorpyrifos, and dimethoate, pyrethroids group (Lambda-Cyhalothrin and cypermethrin) and carbonate group (carbofuran and cartap hydrochloride) during loading, mixing, and spraying of these pesticides without proper respirators. To evaluate the potential occupational exposure of rice farmers in this community, the mean average daily dose (ADD) of acephate, chlorpyrifos, and dimethoate of the organophosphate group was 8× 10-3 mg/kg-day, 1.53 × 10-3 mg/kg-day and 7.91 × 10-3 mg/kg-day, pyrethroid group of cypermethrin 1.91 × 10-3 mg/kg-day and lambda-cyhalothrin 1.26× 10-4 mg/kg-day, and carbonate group of carbofuran and cartap Hydrochloride of rice farmers at 2.27× 10-3 mg/kg-day and 9.6×10-4 mg/kg-day, respectively. To characterize non-cancer risk, a hazard quotient (HQ) was applied. The HQ for the organophosphate group of chlorpyrifos acute and sub-chronic exposures was 5.1 times while 23.93 times was chronic exposure exceeded the acceptable level (greater than 1) in both short-term and long-term. In conclusion, there has a higher potential of inhalation exposure for rice farmers in Ayeyarwady, Delta Region in Myanmar might be exposed to chlorpyrifos of organophosphate group in pesticide application. Regarding, health adverse effects related to pesticide exposure, most of the rice farmers in the study areas suffered acute symptoms was dizziness accounted for 239 (53%). Likewise, (31.8%) of rice farmers suffered from dizziness as a sub-chronic symptom within one month after application of the pesticide. In addition, subjective signs, and symptoms related to pesticide exposure (14%) of the participants often suffered headaches, and (9%) feeling nervous were the most occurrence symptoms.
Climate Imaginaries and Human Mobility: Complicating Climate Mobility as Adaptation in Thailand
Authors:   , Steiner Clare 
Published: September 2023

For centuries, agricultural households in Thailand have engaged in mobility to adapt to environmental change and climate shocks. However, current framings of “climate migration as adaptation” obscure how these adaptation pathways are constructed by existing power relations, leaving institutions liable to re-enforce inequality. This thesis uses the concept of “imaginaries” to de-construct how certain knowledge and values advance over others in the process of negotiating and acting towards a preferable future. It employs a dual methodological approach with a case study of Baan Non Daeng in Ubon Ratchathani, Thailand to analyze dominant imaginaries in Thailand and their function and limitations in assessing smallholder farmer mobility decision-making in the context of slow on-set environmental change. The thesis first performs a discourse analysis of institutional policy texts on climate change, migration, and development in Thailand to find that institutions value futures that encourage smallholder farmers to leverage their existing resources and act as entrepreneurial agents of development. It also finds that climate mobility imaginaries are founded on the idea of the well-resourced migrant who has access to longer distance mobilities that can transform rural livelihoods. The thesis then uses interviews conducted in Baan Non Daeng to complicate these imaginaries and engage with structural political economy factors driving relative (im)mobilities. It finds that relative positioning influences household perceptions of environmental risks and resources that contribute towards differing practices and scales of mobility. The thesis ends by arguing for processes like knowledge co-production and translocal visioning that better address root issues of marginalization in policy and practice.
Juxtaposition images of two Koreas portrayed in Crash Landing on You and its effect on Thai audiences' perspective
Authors:   , Chanthanee Phonpraphai 
Published: September 2023

This study examines the historical and political contexts of the two Koreas in terms of different ideologies that affect various elements of society by exploring insights into the backgrounds of South Korea and North Korea from a literature review. To analyze the disparities between the two nations, the research focuses on the scripts, visuals, and hidden agendas depicted in the renowned Korean series Crash Landing on You, along with investigating the production process and relevant interviews. In addition to exploring the narration, the study also surveyed the impact of the drama on the international perspective of the two Koreas through the eyes of foreigners. Each Korea achieves its newly formed ideological constructs, which play an important part in shaping areas of society such as the way of life, language, and social value. Crash Landing on You was designed to depict the contrasting visuals between South Korea and North Korea which outsiders never had perceived before. As a result, the more they diverge, the more vivid their national images are. Even while the series focuses mostly on highlighting the differences between the two, what is also delivered is a story of the Korean Peninsula nowadays.
Exploring roles of miR-885-5p in hepatocellular carcinoma
Authors:   , Nokkeaw Archittapon 
Published: September 2023

Hepatocellular carcinoma (HCC), the most prevalent form of liver cancer, exerts a significant burden on Southeast Asian countries and stands as the third leading cause of cancer-related mortality worldwide. Despite this alarming impact, effective treatments for HCC are lacking, resulting in low survival rates and high recurrence rates. Therefore, a comprehensive understanding of the disease's underlying mechanisms is crucial for the development of novel and potent therapies. Recently, it has been recognized that microRNAs (miRNAs) play a vital role in tumorigenesis, including HCC. Our bioinformatic analysis has highlighted hsa-miR-885-5p as a potential candidate miRNA due to its downregulation in HCC tissue compared to normal tissue, particularly in higher-grade tumors. This intriguing finding prompted our study to investigate the function of hsa-miR-885-5p in HCC. In our research, we employed functional assays to demonstrate that hsa-miR-885-5p effectively suppresses cell proliferation and hinders the critical G1/S transition, a crucial step initiating cell proliferation. Through meticulous miRNA target prediction analysis, we identified CDK6, a gene associated with the G1/S transition, as a potential target of hsa-miR-885-5p. Further experimental validation confirmed that hsa-miR-885-5p directly targets CDK6, leading to reduced expression levels and perturbations in protein levels. Moreover, we conducted RNA-seq analysis, which not only supported the involvement of hsa-miR-885-5p in cell cycle processes but also indicated its potential as a negative regulator of the G1/S transition. These findings collectively highlight the interesting role of hsa-miR-885-5p in HCC, potentially through its interaction with CDK6. Consequently, further investigations into the precise functions and therapeutic potential of hsa-miR-885-5p are warranted to unlock its full therapeutic value in HCC.
A randomized controlled trial comparing the diagnostic yield of using Rapid On-Site Cytology Evaluation (ROSE) and without using ROSE in Radial Probe Endobronchial Ultrasound (R-EBUS) guided sheath transbronchial lung biopsy with bronchial brushing in peripheral pulmonary lesions
Authors:   , Silathapanasakul Kulchamai 
Published: September 2023

BACKGROUND: Radial Probe Endobronchial Ultrasonography (RP-EBUS) guided transbronchial biopsy with bronchial brushing is an effective way of tissue assessment for evaluating peripheral lung lesion combined with Rapid on-site Evaluation (ROSE). Our study aimed to evaluate the efficacy of ROSE add on RP-EBUS guided sheath transbronchial lung biopsy to improve the overall diagnostic yield.

OBJECTIVES: The purpose of this study was to compare the diagnosis yield of peripheral lung lesions or nodules from the ROSE add on Radial Probe Endobronchial Ultrasonography (RP-EBUS) guided sheath transbronchial biopsy with bronchial brushing compared to the control group.

METHODS: In this prospective randomized controlled trial study. All patients age > 18 years old who diagnosed with peripheral lung lesions size < 3 cm. from chest computed tomography are randomized into 2 subgroups underwent RP-EBUS guided sheath transbronchial lung biopsy with bronchial brushing with and without using ROSE. The diagnostic yield was compared.

RESULTS : 68 patients were enrolled. 34 patients were randomized equally to ROSE group and control group. The diagnostic yield was similar in both groups without statistically significant. There was no significant differences in baseline characteristic. There was a trend toward reduce the procedure durations and amount of sedatives used in the ROSE group with statistically significance difference (P=0.015 and P<0.001 respectively). Complications rates in both groups are not different.

CONCLUSION: The diagnostic yield of peripheral lung lesions was similar in ROSE add on RP-EBUS and RP-EBUS alone. However routine use of ROSE in RP-EBUS guided sheath transbronchial biopsy with bronchial brushing associated with a reducing in procedure times and decreased amount of sedative use. We recommended ROSE add on RP-EBUS in selected cases. Our study could be applicable only in experienced center which available intervention pulmonologists and cytologists.
D-lactic acid fermentation platform from oil palm trunk sap by sporolactobacillus terrae SBT-1
Authors:   , Sukaiem Naphatsawan 
Published: September 2023

Lactic acid is an organic acid that contains two enantiomers, L- and D-lactic acid, and is considered the most potential monomer for many industrial products. Lactic acid has versatile applications in the pharmaceutical, food, textile, chemical, and leather industries moreover in poly-lactic acid (PLA) manufacturing. While L-lactic acid is well known in many commercial products and studies, only a few studies on D-lactic acid were found. Lactic acid can be produced either by microbial fermentation or chemical synthesis. Approximately 90 percent of the total lactic acid produced worldwide is via microbial fermentation which provides an optically pure L- or D-lactic acid. To reduce the lactic acid production cost, agricultural waste which is second-generation biomass is applied for lactic acid fermentation. Oil palm trunk sap (OPT sap), the waste from the oil palm trunk recycle process, has the potential as a bacterial culture medium, due to the composition such as sucrose, glucose, fructose, and amino acid. In this study, by applying OPT sap as a carbon substrate together with other commercial sugars (glucose, sucrose, raw sugar, and molasses), fermented by Sporolactobacillus terrae SBT-1, the efficient D-lactic acid producer, the result from the enhancing D-lactic acid fermentation in shake flask provide a high D-lactic acid yield (0.87-0.91 g/g) and productivity (2.42-4.36 g/L·h) and also the high optical purity (96-99% ee). Thus, this platform was optimized in 5L fermenter, the results showed a good fermentation performance. The lactic acid production yield was high (0.84-.1.04 g/g), also the productivity (3.45-6.21 g/L·h), and the optical purity was almost higher than flask culture. In the fermentation using OPT sap supplemented with raw sugar as the carbon substrates, the most effective cost reduction by 14.65% was observed. From the result mentioned above, we can claim that OPT sap is a potential second-generation feedstock for lactic acid fermentation by S. terrae SBT-1.