273 research outputs found
A hybrid approach combining Fuzzy AHP and Fuzzy TOPSIS to rank agritourism destinations in Tan Cuong green tea region, Thai Nguyen, Vietnam
No full textAgritourism is recognized as a strategic approach to harness the existing advantages of rural areas, including both on-farm and off-farm attractions. This study, conducted in the Tan Cuong tea region of Thai Nguyen, examines the practical application of the Fuzzy Analytic Hierarchy Process (AHP) and the Fuzzy Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) in ranking agritourism destinations. Five experts, all with experience in agritourism in Tan Cuong, provided data through questionnaires for the analysis. The results indicated that the Hao Dat Tea Cooperative (A1) ranked highest for sustainable agritourism development. Additionally, the transportation system serving agritourism destinations (C9) was identified as the most influential factor based on the empirical findings. Based on these results, policy recommendations are proposed to prioritize the development of agritourism across various destinations, with suggestions for both central and local policy initiatives
Vizualizace konceptů pomocí generování obrazu
No full textNázev: Vizualizace konceptů pomocí generování obrazu Autor: Tien Dat Nguyen Katedra: Ústav formální a aplikované lingvistiky Vedoucí práce: RNDr. Pavel Pecina, Ph.D., Ústav formální a aplikované lingvistiky MFF UK a Angeliki Lazaridou, Ra_aella Bernardi, Marco Baroni (University of Trento), Počítačová lingvistika a počítačové vidění mají společný způsob, jak zachytit sémantiku lingvistických/vizuálních jednotek pomocí vektorové reprezentace. Navíc kvalitní sémantická reprezentace může být efektivně sestrojena pomocí nedávných pokroků v metodách neuronových sítí. Avšak jejich pochopení zůstává omezené a je nutné je posuzovat intuitivně. Mezimodální mapování je mapování mezi vektorovou sémantikou zabudovanou do slov a vizuálních reprezentací odpovídajících objektů v obrazu. Invertování obrazové reprezentace zahrnuje učení inverze obrazu vizuálních vektorů (SIFT, HOG a CNN rysy) pro rekonstrukci původní informace. Cílem této práce je vybudování úplné pipeline, ve které jsou slovní reprezentace transformovány do obrazových vektorů pomocí mezimodálního mapování a tyto vektory jsou promítnuty do pixelového prostoru použitím inverze. Ukazuje se, že tento způsob může být průlomovým prostředkem, jakým lze zkontrolovat a vyhodnotit sémantiku zakódovanou v reprezentaci slov generováním obrázků, které jej reprezentují.Title: Toward concept visualization through image generation Author: Tien Dat Nguyen Department: Institute of Formal and Applied Linguistics Supervisors: Pavel Pecina (Charles University in Prague), Angeliki Lazaridou, Raffaella Bernardi, Marco Baroni (University of Trento), Abstract: Computational linguistic and computer vision have a common way to embed the semantics of linguistic/visual units through vector representation. In addition, high-quality semantic representations can be effectively constructed thanks to recent advances in neural network methods. Nevertheless, the under- standing of these representations remains limited, so they need to be assessed in an intuitive way. Cross-modal mapping is mapping between vector semantic embedding of words and the visual representations of the corresponding objects from images. Inverting image representation involves learning an image inversion of visual vectors (SIFT, HOG and CNN features) to reconstruct the original one. The goal of this project is to build a complete pipeline, in which word represen- tations are transformed into image vectors using cross modal mapping and these vectors are projected to pixel space using inversion. This suggests that there might be a groundbreaking way to inspect and evaluate the semantics encoded in word representations by...Institute of Formal and Applied LinguisticsÚstav formální a aplikované lingvistikyMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Towards concept visualization through image generation
No full textTitle: Toward concept visualization through image generation Author: Tien Dat Nguyen Department: Institute of Formal and Applied Linguistics Supervisors: Pavel Pecina (Charles University in Prague), Angeliki Lazaridou, Raffaella Bernardi, Marco Baroni (University of Trento), Abstract: Computational linguistic and computer vision have a common way to embed the semantics of linguistic/visual units through vector representation. In addition, high-quality semantic representations can be effectively constructed thanks to recent advances in neural network methods. Nevertheless, the under- standing of these representations remains limited, so they need to be assessed in an intuitive way. Cross-modal mapping is mapping between vector semantic embedding of words and the visual representations of the corresponding objects from images. Inverting image representation involves learning an image inversion of visual vectors (SIFT, HOG and CNN features) to reconstruct the original one. The goal of this project is to build a complete pipeline, in which word represen- tations are transformed into image vectors using cross modal mapping and these vectors are projected to pixel space using inversion. This suggests that there might be a groundbreaking way to inspect and evaluate the semantics encoded in word representations by..
Method development for the determination of molecular hydrogen from new pharmaceutical formulations.
No full textAbstract.
Hydrogen has been embarking in the medical field as a novel therapeutic gas with outstanding antioxidation properties in recent years. This brings on a need for a reliable method of quantifying this molecule that is both affordable and available in most research institutes. Some researchers have been using gas chromatography to measure hydrogen and were able to separate hydrogen from other gases. In this paper, the goal is to study the impact of different parameters and setups of gas chromatography and develop an optimized method to accurately quantify hydrogen in a gas mixture. This study uses hydrogen in air mixture of various concentrations and measures it by a GC-TCD system using N2 as carrier gas. Through experimenting with changing temperature, loops volume, split ratio, etc., we want to see how the system reacts to these alterations. The final optimized parameters can be found in the conclusion of this research. It was later used to determine the LOD/LOQ, precision and accuracy of the method and a calibration curve was created (Figure 13). This data serves as the basis for an investigation of a new hydrogen-releasing medication developed by our university and could be a guideline for researchers who work with hydrogen.
Author: Nguyen Thanh Dat.
Supervisor: Dr. Bak István.egységes, osztatlangyógyszerészango
The Interactions among the Heavy Metals in Soils and in Weeds and Their Antioxidant Capacity under the Mining Activities in Thai Nguyen Province, Vietnam
No full textIn this study, the relationship between heavy metals (HMs) concentrations in soils and several weeds including Cyclosorus parasiticus, Dicranopteris linearis, Pityrogramma calomelanos, and Pteris vittata in three mining sites (Cam Gia (Thai Nguyen city), Tan Long (Dong Hy district), and Ha Thuong (Dai Tu district)) in Thai Nguyen province, Vietnam, have been investigated. The levels of HMs varied among soil origins and showed the contaminations of As, Cu, and Pb in soil samples collected in Dong Hy and Dai Tu districts. In addition, the HM distribution and cocontamination phenomena in different soils significantly affected the HM residues and transportation abilities into different species as well as tissues. Moreover, based on the analysis of bioaccumulation factor (BF) and translocation factor (TF), C. parasiticus and D. linearis were found potentially for phytoextraction by roots, while P. calomelanos and P. vittata were suitable for hyperaccumulation in shoots and leaves. Consequently, the strongest antioxidant property by 1,1-diphenyl-2-picrylhydrazyl (DPPH) and superoxide anion (SRSA) radical scavenging assays were demonstrated in the methanol root extracts of C. parasiticus and P. vittata, respectively. In conclusion, the correlation among HM in soils and tissues with antioxidant property allows us to hypothesize that the presence of these elements can enhance the antioxidant activity of plant extracts, suggesting to apply the weeds in phytoremediation as well as in phytomedicine
FreGrad: 확산 보코더에 이산 웨이블릿 변환 적용
No full text학위논문(석사) - 한국과학기술원 : 전기및전자공학부, 2025.2,[iii, 22 p. :]The goal of this work is to generate realistic audio with a lightweight and fast diffusion-based vocoder, named FreGrad. Our framework consists of the following three key components: (1) We employ discrete wavelet transform that decomposes a complicated waveform into sub-band wavelets, which helps FreGrad to operate on a simple and concise feature space, (2) We design a frequency-aware dilated convolution that elevates frequency awareness, resulting in generating speech with accurate frequency information, and (3) We introduce a bag of tricks that boosts the generation quality of the proposed model. In our experiments, FreGrad achieves times faster training time and times faster inference speed compared to baseline while reducing the model size by times (only M parameters) without sacrificing the output quality. We provide the synthesized audio samples at: \url{https://mm.kaist.ac.kr/projects/FreGrad/}.한국과학기술원 :전기및전자공학부
Effect of large graphene particle size on structure, optical property and photocatalytic activity of graphene-titanate nanotube composites
No full textAvailable online 19 October 2021In this work we investigate the crystal transformation and optical properties of hydrothermal titania nanotube (TNT) when combining with large size of exfoliated graphene achieved by electrochemical process (EC-Gr). The TNT monoclinic structure has been changed to TiO2 anatase phase when TNT was grown in the presence of graphene dispersion. The effect of graphene on the evolution of TNT crystal could be understood by the interaction of carbon elements in graphene and Ti4+ ions in the titania structure. Due to the carrier separation which reduced recombination rate of excited photoelectrons and holes revealed by photoluminescence characterizations, the visible light photocatalytic activity in degradation of methylene blue in solution of the composite was enhanced. The photocatalytic enhancement was discussed and clarified based on UV–vis diffuse absorption spectra and time-resolved photoluminescence investigation.Vo Cao Minh, Phan Tan Dat, Pham Thi Thuy, Nguyen Xuan Sang, Nguyen Tri Tuan, Tran Thanh Tung, Dusan Losi
Metaphire houlleti Perrier 1872
No full textMetaphire houlleti (Perrier, 1872) Perichaeta houlleti Perrier, 1872: 99, Plate 2, Figs 31–44. Pheretima houlleti— Gates 1939: 94; 1972: 190; Pham 1995c: 89; Nakamura 1999: 42; Thai 2000a: 309; Huynh 2005a: 109; Huynh 2005b: 20; Nguyen et al. 2010: 114; Pham 2010: 63; Nguyen T.T. & Tran 2008: 61; Nguyen & Nguyen 2010: 123; Nguyen & Huynh 2011: 1018; Nguyen et al. 2011: 1025; Nguyen et al. 2012: 146; Nguyen 2013: 49; Nguyen 2014: 109. Metaphire houlleti— Sims & Easton 1972: 238; Blakemore 2007a: 48; Blakemore 2008b. Perichaeta campanulata Rosa, 1890b: 115. Pheretima campanulata— Gates 1930: 307, 311; 1939: 83; Thai et al. 2004: 759; Pham 1995c: 89; Nakamura 1999: 41; Thai 2000a: 308; Huynh 2005a: 112; Nguyen V.T. & Tran 2008: 184; Pham 2010: 63; Nguyen & Nguyen 2010: 123; Nguyen & Huynh 2011: 1018; Nguyen et al. 2011: 1025; Nguyen et al., 2012: 146. Metaphire campanulata— Sims & Easton 1972; 238; Blakemore 2007a: 48, treated as synonym of Metaphire houlleti (Perrier, 1872). Type locality. India (Calcutta). Type material. MHNH, France. Examined material. 25 C and 18 A (CTU-EW.006.06) natural forest, Cat Tien NP, Tan Phu, Dong Nai, 13/ 10/2013, coll. Le Van Nhan; 22 C (CTU-EW.006.02) Phung Hiep, Can Tho, 9/10/2009, coll. Ngo Thi Ngan; 13C, 4 A (SORC-V.129.01) deciduous forest, Ealop, Dak Lak, 18/10/1989, coll. Huynh Thi Kim Hoi; 15 C and 5 A (CTU-EW.018.01) Nam Cat Tien, Tan Phu, Dong Nai, 13/10/2013, coll. Le Van Nhan; 11 C (CTU-EW.018.05) Cu Lao Duyen, Cho Moi, An Giang, 9/2009, coll. Ho Minh Thuan. Records from Vietnam. Son La (Moc Chau); Dien Bien (Tuan Giao; Dien Bien); Nghe An (Que Phong); Quang Tri (Huong Hoa); Thua Thien Hue (Huong Tra; Hue; Huong Thuy; Nam Dong); Da Nang (Hoa Vang; Son Tra; Ba Na NP); Quang Nam (Dien Ban; Hiep Duc; Tam Ky; Tien Phuoc; Phuoc Son; Tra My); Quang Ngai (Son Ha); Kon Tum (Dak Glei; Sa Thay); Binh Dinh (Tuy Phuoc; An Nhon); Gia Lai (An Khe; Duc Co); Phu Yen (Tuy An); Dak Lak (Ea Sup; Yok Don NP; Buon Me Thuot); Dak Nong (Ta Dung Mts); Binh Thuan (Tanh Linh); Lam Dong (Duc Trong; Da Lat); Khanh Hoa (Nha Trang); Dong Nai (Vinh Cuu; Xuan Loc; Tan Phu; Dinh Quan; Trang Bom; Thong Nhat; Nhon Trach; Long Thanh; Cam My); Tay Ninh (Ba Den Mt.); Dong Thap (Thanh Binh; Lap Vo; Cao Lanh; Cu Lao Tan Long); Hau Giang (Phung Hiep; Nga Bay); Long An (Vinh Hung; Thanh Hoa); Kien Giang (Phu Quoc Isl.); Tien Giang (Cai Be; Cai Lay; Chau Thanh); Vinh Long (Long Ho); An Giang (Cho Moi: Cu Lao My Hiep; Chau Doc; Tinh Bien; Tri Ton); Kien Giang (Kien Luong; Hon Tre Isl.; Lai Son Isl.; An Son Isl.; Hon Dat); Hau Giang (Phung Hiep); Can Tho; Ben Tre (Binh Dai); Tra Vinh (Duyen Hai; Hoa Minh Isl.; Cau Ke); Soc Trang (Long Phu; Tran De; Ke Sach; Chau Thanh); Bac Lieu (Hoa Binh); Ca Mau (Dam Doi; Cai Nuoc; Ca Mau City) (Do 1994; Nguyen 1994; Pham 1995c, 2010; Huynh 2005a; Thai et al. 2004; Nguyen V.T. & Tran 2008; Nguyen & Nguyen 2010; Nguyen & Huynh 2011; Nguyen et al. 2010; Nguyen et al. 2011; Nguyen et al. 2012). Distribution. Cosmopolitan species, occurring in India, Thailand, Cambodia, Laos, Myanmar, Taiwan, Singapore, China, Australia, USA (Gate 1939, 1972; Easton 1982; Thai & Do 1989; Thai & Samphon 1991; Shen & Yeo 2005; Shen et al. 200 5). Vietnamese name. Giun houllet. Remarks. Gates (1939) noted that the original home of the species is probably somewhere a region comprising eastern Myanmar and Thailand. The species has been known in Vietnam as two different species, Pheretima houlleti and Pheretima campanulata.Published as part of Nguyen, Tung T., Nguyen, Anh D., Tran, Binh T. T. & Blakemore, Robert J., 2016, A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae), pp. 1-92 in Zootaxa 4140 (1) on pages 58-59, DOI: 10.11646/zootaxa.4140.1.1, http://zenodo.org/record/25650
Project Play: An exploration of how to combine architecture and play
No full textEverything started with my fascination of Pokémon-Go; the cultural moment when the building environment was used differently than intended; massive groups gathered around in public parks and kids invading your backyard. I wanted to understand the behavior of people and the new ways of interaction between space and humans. Literature research helped defining different fields of game-theory and architectural space, and most importantly the relationship between those. It gave the knowledge needed to do observations and make new conclusions. The results were descriptions of spaces where the situation of the Pokémon-GO effect occurred: playgrounds. These playgrounds were spaces where the players could be free and use their imagination to build their own world, where humans can be playful. With my design I intent to have the same methodology as these playgrounds.Architecture, Urbanism and Building Sciences | Explorela
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