447 research outputs found
AN INVESTIGATION INTO EFL UNIVERSITY STUDENTSâ PERCEPTIONS TOWARD BENEFITS OF MOODLE QUIZ-SUPPORTED LISTENING PRACTICE
Researchers have pointed out that Moodle usage, a type of software supporting blended learning enhances learning beyond the classroom. It is proven that blended learning takes place when Moodle is employed. The aim of this study was to investigate what perceptions the EFL university students had toward the Moodle Quiz-supported listening practice. This was a descriptive research. The instrument of this study was a questionnaire developed by generating a list of factors derived from the literature to find out what perceptions EFL students at Tay Do University had toward the Moodle Quiz-supported listening practice. The questionnaire was based on close-ended five-point Likert scale statements. The findings showed that the participants held a positive perception toward the Moodle Quiz-supported listening practice as it enhanced learning outcomes, enhanced their interest/enjoyment in listening to English, promoted their independent learning, fostered a flexible learning environment, and provided authentic materials. Article visualizations
Image Compression Using Burrows-Wheeler Transform
TÀmÀn työn tarkoituksena on tutkia kuvan pakkausta Burrows-Wheelerin muunnosta kÀyttÀmÀllÀ. Kuvan tiivistÀmisessÀ tarkoituksena on tiivistÀÀ kuva muotoon, joka tallennetaessa saatetaan mahdollisimman pieneen tilaan, sekÀ nopeuttaa kuvan siirtÀmistÀ tietoliikenteen vÀlityksellÀ. Burrwos-Wheeler muunnos perustuu annettuun datan uudelleenjÀrjestÀmiseen, niin ettÀ muunnoksen jÀlkeen data on helpompi pakata.
Ennen kuin voidaan kÀyttÀÀ Burrows-Wheelerin muunnosta, kuva pitÀisi ensin esikÀsitellÀ diskreettillÀ kosinimuunnoksellÀ, diskreettillÀ aallokemuunnosellÀ tai ennustuskoodauksellÀ. TÀmÀn jÀlkeen 2D-kuvan pikseliit skannataan kÀyttÀmÀllÀ esilaisia skannausmenetelmiÀ, ja voidaan hyödyntÀÀ Burrows-Wheelerin menetelmÀllÀ.
Burrows-Wheelerin yhteydessÀ kÀytetÀÀn hyvÀksi esim. move-to-front ja run-length-koodaus menetelmiÀ ennen varsinaista entropiakoodausta, jotta kuva voitaisiin tiivistÀÀ mahdollisimman pieneen tilaan. TyössÀ tutkitaan sekÀ hÀviöllistÀ ettÀ hÀviötöntÀ kuvan pakkausta.The purpose of this thesis was to study image compression using the Burrows-Wheeler transform. The aim of image compression is to compress the image into a format which saves the storage space and provides an efficient format for transmission via telecommunication channels. The Burrows-Wheeler transform is based on block sorting, which rearranges data into an easier format for compressing.
Before utilizing the Burrows-Wheeler transform, the image need to be pre-process by using a discrete cosine transform, a discrete wavelet transform or predictive coding. Then the image is converted from a 2-dimensional to a 1-dimensional pixel sequence with different scanning methods. The forward Burrows-Wheeler transform is applied on block of the image data.
While compressing the image into the smallest storage space, the move-to-front and run-length encoding can be used to improve the compression ratio before entropy encoding. This thesis studies both lossless and lossy image compression
AN INVESTIGATION INTO DIFFICULTIES IN ENGLISH LISTENING OF FRESHMEN MAJORING IN ENGLISH AT A UNIVERSITY IN THE MEKONG DELTA, VIETNAM
English is a very popular language in the world. However, learning a foreign language is not an easy process for learners, especially the English listening process. In fact, most learners believe that it is hard for them to master this skill. Therefore, the research âAn Investigation into Difficulties in English Listening of Freshmen Majoring in English at a University in the Mekong Deltaâ was conducted with the purpose of helping these students to recognize clearly their own problems in English listening. Statistical data were collected from eighty-five English-majored freshmen. The main instrument of the study was a questionnaire. The findings of the research would point out the studentsâ difficulties in linguistics, including vocabulary, grammar, pronunciation, intonation and accent; background knowledge; and difficulties from their own minds. One more notable purpose of this research is that thanks to the results, students can now solve their own problems, so that they can study better.
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PROBLEMS IN VIETNAMESE-ENGLISH TRANSLATION OF RELATIVE CLAUSES FOR ENGLISH-MAJORED JUNIORS AT TAY DO UNIVERSITY, VIETNAM
Realistically, Vietnamese-English translation is not easy for Vietnamese students to master, and relative clauses are not typical in Vietnamese. Therefore, learners cannot avoid mistakes in their translation practice. Concerned researchers carried out a study to identify common Vietnamese-English translation errors in terms of English relative clauses. The participants were 60 juniors from the Bachelor of English course at Tay Do University. Test papers and interviews were employed as the instruments. The collected data from the two instruments mentioned above were all analyzed carefully afterward. The results of the study showed that the students suffered from a variety of grammar and vocabulary problems hindering them from translating Vietnamese into English correctly.
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Äáș¶C TRÆŻNG KHAI THĂC NGUá»N LỹI Äá»NG VáșŹT ÄĂY CĂ GIĂ TRá» KINH TáșŸ CHỊ YáșŸU á» THỊY Vá»°C NHA PHU, KHĂNH HĂA
The exploitation characteristics of zoobenthos resources with economic value at the Nha Phu waters were determined by five field trips carried out from 2011 - 2016. The results shows that Nha Phu waters have had great exploitation pressure, with high density of boats (11.9 motorboats/100 ha, 7.7 boats/100 ha and 16.2 people/100 ha), average days of fishery exploitation being high (185 days/fishery/year) and concentrating mainly in the dry season (70% of total average days of fishery/year), specially the destructive artisanal fisheries, (56% of total time of fishery). The average yeild of fishery was dominant in the dry season (73% of total commercial yield and 93% of total number of benthic animal seeds), in which the destructive artisanal fisheries possess 73% of the entire yield of benthic animal. Yields of zoobenthos have decreased seriously, specially for crustaceans (17%). It may be due to greater pressure of fishery exploitation, especially the destructive artisanal fisheries. The results of this study will contribute the scientific basis and data to planning for effective exploitation and management of fisheries resources.Äáș·c trÆ°ng khai thĂĄc nguá»n lợi Äá»ng váșt ÄĂĄy cĂł giĂĄ trá» kinh táșż chủ yáșżu á» thủy vá»±c Nha Phu, Viá»t Nam ÄÆ°á»Łc xĂĄc Äá»nh thĂŽng qua 5 chuyáșżn Äiá»u tra kháșŁo sĂĄt từ nÄm 2011 - 2016. Káșżt quáșŁ nghiĂȘn cứu cho tháș„y, thủy vá»±c Nha Phu cĂł ĂĄp lá»±c khai thĂĄc lá»n, vá»i máșt Äá» phÆ°ÆĄng tiá»n (11,9 ghe/100 ha, 7,7 sá»ng/100 ha vĂ 16,2 ngÆ°á»i/100 ha), sá» nghá» (13 nghá») vĂ thá»i gian khai thĂĄc trung bĂŹnh nghá» khĂĄ cao (185 ngĂ y/nghá»/nÄm) vĂ táșp trung chủ yáșżu vĂ o mĂča khĂŽ (chiáșżm gáș§n 70% tá»ng thá»i gian hoáșĄt Äá»ng trung bĂŹnh nghá»/nÄm), Äáș·c biá»t nghá» khai thĂĄc hủy diá»t táșn thu nhÆ° xiáșżt Äiá»n, lÆ°á»i lá»ng, cĂ o mĂĄy, giĂŁ cĂ o (chiáșżm trĂȘn 56% tá»ng thá»i gian nÄm). SáșŁn lÆ°á»Łng của cĂĄc nghá» khai thĂĄc chiáșżm Æ°u tháșż vĂ o mĂča khĂŽ (chiáșżm trĂȘn 73% tá»ng sáșŁn lÆ°á»Łng khai thĂĄc thÆ°ÆĄng pháș©m (423,9 táș„n/nÄm) vĂ trĂȘn 93% tá»ng con giá»ng (161.000 con giá»ng/nÄm) Äá»ng váșt ÄĂĄy cáșŁ nÄm), trong ÄĂł cĂĄc nghá» hủy diá»t, táșn thu chiáșżm chiáșżm trĂȘn 73% tá»ng sáșŁn lÆ°á»Łng Äá»ng váșt ÄĂĄy. ThĂ nh pháș§n vĂ sáșŁn lÆ°á»Łng nguá»n lợi Äá»ng váșt ÄĂĄy cĂł chiá»u hÆ°á»ng suy giáșŁm nghiĂȘm trá»ng, Äáș·c biá»t nguá»n lợi giĂĄp xĂĄc (giáșŁm 17%). NguyĂȘn nhĂąn cĂł thá» do thá»i gian hoáșĄt Äá»ng trung bĂŹnh/nÄm vĂ doanh thu của cĂĄc loáșĄi nghá» khĂĄ cao, Äáș·c biá»t nghá» khai thĂĄc mang tĂnh hủy diá»t, táșn thu. Káșżt quáșŁ nghiĂȘn cứu nĂ y cung cáș„p cÆĄ sá» khoa há»c vĂ dữ liá»u cho quy hoáșĄch khai thĂĄc vĂ quáșŁn lĂœ nguá»n lợi thủy sáșŁn hợp lĂœ
Residual Cardiovascular Risk Factors in Dyslipidemia
Cardiovascular disease poses a major challenge for the 21st century. Although good control of blood pressure and type 2 diabetes and reducing low-density lipoprotein-cholesterol levels can improve cardiovascular outcomes, a substantial residual risk remains existed after treatment in most patient populations. Recently, many efforts have been directed at finding the important role of low high-density-lipoprotein cholesterol, high triglycerides, especially triglyceride-rich lipoproteins and lipoprotein (a) in the metabolism of atherosclerotic plaque formation Therefore, based on the recent evidence, identification and treatment of these risk factors may play a role in optimizing therapeutic strategy, particularly in high risk subjects along with conventional treatment. In clinical practice, adequate attention should be paid when screening and managing residual cardiovascular risk factors in dyslipidemia in term of individualized approach. The ongoing trials will give more answers to elucidate this important area
ÄĂNH GIĂ HIá»U QUáșą Táș I CĂC MĂ HĂNH DOANH NGHIá»P THAM GIA QUáșąN LĂ Ráș N SAN HĂ VĂ MỀC ÄĂCH DU Lá»CH SINH THĂI á» Vá»NH NHA TRANG
The models of coral reef management for the development of ecological tourism were conducted under the coordination among the 3 businesses (Khanh Hoa Salanganes Nest Company, Vinpearl Nha Trang and Tri Nguyen Tourism), Institute of Oceanography and Khanh Hoa Department of Natural Resources Environment. The analysis of trends of coral cover, density of reef fishes and big size invertebrates at 3 sites allowed assessing effectiveness of 3 yearsâ management. The stability of hard coral cover, except the decline at southern Hon Tam due to impacts of the typhoon in Nov., 2017 indicated no increased damage to corals from human activities. However, the dominance of small size fish ( 10 cm in length), the decline of density of larger size fish and the poorness of large size invertebrate showed continuous overexploitation at these managed areas.MĂŽ hĂŹnh quáșŁn lĂœ ráșĄn san hĂŽ vĂŹ mỄc ÄĂch du lá»ch sinh thĂĄi ÄÆ°á»Łc thá»±c hiá»n vá»i sá»± tham gia của Viá»n HáșŁi dÆ°ÆĄng há»c, Sá» TĂ i nguyĂȘn vĂ MĂŽi trÆ°á»ng KhĂĄnh HĂČa vĂ 3 doanh nghiá»p bao gá»m CĂŽng ty TNHH NhĂ nÆ°á»c MTV Yáșżn SĂ o, CĂŽng ty TNHH Vinpearl Nha Trang vĂ CĂŽng ty Du lá»ch TrĂ NguyĂȘn. Hiá»u quáșŁ sau 3 nÄm quáșŁn lĂœ ÄÆ°á»Łc ÄĂĄnh giĂĄ thĂŽng quan phĂąn tĂch xu tháșż biáșżn Äá»ng vá» Äá» phủ san hĂŽ, máșt Äá» cĂĄ ráșĄn vĂ sinh váșt ÄĂĄy kĂch thÆ°á»c lá»n. Sá»± á»n Äá»nh Äá» phủ san hĂŽ á» khu vá»±c Sau Sao - Vinpearl vĂ BĂŁi SáșĄn - HĂČn Miáșżu chứng tá» san hĂŽ khĂŽng bá» suy thoĂĄi. Trong khi ÄĂł, Äá» phủ san hĂŽ á» Nam HĂČn Táș±m tÄng rĂ” rá»t trong giai ÄoáșĄn 2015â2017 nhÆ°ng giáșŁm Äá»t ngá»t vĂ o nÄm 2018 do bĂŁo sá» 12 diá»
n ra vĂ o thĂĄng 11/2017. Tá»ng máșt Äá» cĂĄ ráșĄn biáșżn Äá»ng khĂŽng rĂ” rá»t vá»i Æ°u tháșż lĂ nhĂłm cĂĄ cĂł kĂch thÆ°á»c nhá» hÆĄn 10 cm, trong khi nhĂłm cĂĄ cĂł kĂch thÆ°á»c lá»n suy giáșŁm ÄĂĄng ká» vá» máșt Äá». Máșt Äá» Äá»ng váșt ÄĂĄy kĂch thÆ°á»c lá»n ráș„t tháș„p vĂ chủ yáșżu thuá»c vá» cĂĄc nhĂłm khĂŽng cĂł giĂĄ trá» kinh táșż. PhĂąn tĂch nĂ y chứng tá» ráș±ng hoáșĄt Äá»ng quáșŁn lĂœ ÄĂŁ ngÄn cháș·n ÄÆ°á»Łc tĂĄc Äá»ng của con ngÆ°á»i gĂąy suy thoĂĄi san hĂŽ nhÆ°ng chÆ°a cĂł hiá»u quáșŁ vá»i hoáșĄt Äá»ng khai thĂĄc nguá»n lợi quĂĄ mức
Dengue Dynamics in Binh Thuan Province, Southern Vietnam: Periodicity, Synchronicity and Climate Variability
Dengue has become a major international public health problem due to increasing geographic distribution and a transition from epidemic transmission with long inter-epidemic intervals to endemic transmission with seasonal fluctuation. Seasonal and multi-annual cycles in dengue incidence vary over time and space. We performed wavelet analyses on time series of monthly notified dengue cases in Binh Thuan province, southern Vietnam, from January 1994 to June 2009. We observed a continuous annual mode of oscillation with a non-stationary 2â3-year multi-annual cycle. We used phase differences to describe the spatio-temporal patterns which suggest that the seasonal wave of infection was either synchronous with all districts or moving away from Phan Thiet district, while the multi-annual wave of infection was moving towards Phan Thiet district. We also found a strong non-stationary association between ENSO indices and climate variables with dengue incidence. We provided insight in dengue population transmission dynamics over the past 14.5 years. Further studies on an extensive time series dataset are needed to test the hypothesis that epidemics emanate from larger cities in southern Vietnam
The Role of Host Traits, Season and Group Size on Parasite Burdens in a Cooperative Mammal
The distribution of parasites among hosts is often characterised by a high degree of heterogeneity with a small number of hosts harbouring the majority of parasites. Such patterns of aggregation have been linked to variation in host exposure and susceptibility as well as parasite traits and environmental factors. Host exposure and susceptibility may differ with sexes, reproductive effort and group size. Furthermore, environmental factors may affect both the host and parasite directly and contribute to temporal heterogeneities in parasite loads. We investigated the contributions of host and parasite traits as well as season on parasite loads in highveld mole-rats (Cryptomys hottentotus pretoriae). This cooperative breeder exhibits a reproductive division of labour and animals live in colonies of varying sizes that procreate seasonally. Mole-rats were parasitised by lice, mites, cestodes and nematodes with mites (Androlaelaps sp.) and cestodes (Mathevotaenia sp.) being the dominant ecto- and endoparasites, respectively. Sex and reproductive status contributed little to the observed parasite prevalence and abundances possibly as a result of the shared burrow system. Clear seasonal patterns of parasite prevalence and abundance emerged with peaks in summer for mites and in winter for cestodes. Group size correlated negatively with mite abundance while it had no effect on cestode burdens and group membership affected infestation with both parasites. We propose that the mode of transmission as well as social factors constrain parasite propagation generating parasite patterns deviating from those commonly predicted
Observation of associated near-side and away-side long-range correlations in âsNN=5.02ââTeV proton-lead collisions with the ATLAS detector
Two-particle correlations in relative azimuthal angle (ÎÏ) and pseudorapidity (Îη) are measured in âsNN=5.02ââTeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1ââÎŒb-1 of data as a function of transverse momentum (pT) and the transverse energy (ÎŁETPb) summed over 3.1<η<4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2<|Îη|<5) ânear-sideâ (ÎÏâŒ0) correlation that grows rapidly with increasing ÎŁETPb. A long-range âaway-sideâ (ÎÏâŒÏ) correlation, obtained by subtracting the expected contributions from recoiling dijets and other sources estimated using events with small ÎŁETPb, is found to match the near-side correlation in magnitude, shape (in Îη and ÎÏ) and ÎŁETPb dependence. The resultant ÎÏ correlation is approximately symmetric about Ï/2, and is consistent with a dominant cosâĄ2ÎÏ modulation for all ÎŁETPb ranges and particle pT
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