4,176 research outputs found
An Invertible Transform for Efficient String Matching in Labeled Digraphs
No full textLet G = (V, E) be a digraph where each vertex is unlabeled, each edge is labeled by a character in some alphabet Ω, and any two edges with both the same head and the same tail have different labels. The powerset construction gives a transform of G into a weakly connected digraph G' = (V', E') that enables solving the decision problem of whether there is a walk in G matching an arbitrarily long query string q in time linear in |q| and independent of |E| and |V|. We show G is uniquely determined by G' when for every v_ ∈ V, there is some distinct string s_ on Ω such that v_ is the origin of a closed walk in G matching s_, and no other walk in G matches s_ unless it starts and ends at v_. We then exploit this invertibility condition to strategically alter any G so its transform G' enables retrieval of all t terminal vertices of walks in the unaltered G matching q in O(|q| + t log |V|) time. We conclude by proposing two defining properties of a class of transforms that includes the Burrows-Wheeler transform and the transform presented here
Litinium quangi Tchesunov, Nguyen Dinh Tu & Nguyen Vu Thanh, sp. n.
No full textLitinium quangi Tchesunov, Nguyen Dinh Tu & Nguyen Vu Thanh sp. n. Figs 1, 2, Table 1 Material. Holotype male, three paratype males, allotype female and paratype female. All the specimens are deposited in the Vietnam National Museum of Nature (18 Hoang Quoc Viet, Caugiay, Hanoi, Vietnam) with slide numbers VNMN.0011 (holotype male, paratype male 3 and allotype female), VNMN.0012 (paratype male 1 and paratype female 1) and VNMN.0013 (paratype male 2). Locality. South Vietnam coast, Dong Nai River Delta, Can Gio National Reserve, 10 ° 32 ' 176 ''N and 106 ° 45 ' 919 ''E, 0.5 m deep. Sediment consisted of silt and clay (80.5 %) and sand (19.5 %). NaCl content 13.5 ‰. Description. Body very long and slender, filiform. Cuticle thick, smooth over entire body. Head slightly separated off by a very slight narrowing at the level of the cephalic setae. Cuticle anterior to the amphideal fovea 1–1.3 µ m thick, posterior to the amphideal fovea 1.6–2 µ m, posterior to the cardia 2–3.4 µ m, tail terminal cuticle 3.9–4.2 µ m. Six inner labial and six outer labial sensilla equal in length and shape. Both circles united in a joint crown of twelve short setae where outer labial setae situated just posterior to inner labial setae. Four equally short cephalic setae situated separately just posterior to the amphideal foveas in area of postcephalic narrowing. Amphideal fovea large, longitudinally ovoid, with distinct cuticularised horseshoe-shaped fringe; aperture round, with very fine rim, located at anterior end of fovea. A few short ventral, subventral and lateral papillae and tiny setae situated posterior to the amphideal fovea, anterior to the excretory pore, at 62–67 µ m from anterior end. A very minute midventral seta about 1 Μ m long present 10–12 Μ m anterior to the ventral pore. No metanemes found. Mouth opening tiny. Buccal cavity not developed as such and its walls not differentiated from the cuticular lining of the pharynx. Pharynx evenly muscular and slender throughout its length but widening gradually to the posterior end. Cardia widely conical and surrounded by intestinal tissue. Midgut lumen is partially filled with mass of fine granular material. Ventral pore at about half distance from anterior end to the nerve ring, and posterior to the midventral seta. Only anterior portion of ventral gland duct discernible. Vulva situated at ~ one fifth of body length from anterior end. Single posterior antidromously reflected ovary disposed ventrally and slightly to the left of the intestine. Uterus elongate and voluminous; uterus empty in both females examined. A short spermatheca just posterior to the uterus filled densely with minute round spermatozoa. Only anterior male gonad present, situated ventrally to the intestine. Spicules short, flat, arcuate, with internal cuticular linear longitudinal stripes, with posterior ends pointed and anterior ends slightly narrowed. One short (0.8–2, µ m long) midventral precloacal seta present, just anterior to the anterior ends of the spicules, 32–35 µ m from the cloacal opening. Tail very short, rounded. Terminal pore and canal well developed, slightly subterminal. A pair of short subventral seta mid-tail length in both males and females; one ventral papilloid sensilla situated at mid-tail length discernible in some specimens. Diagnosis. Litinium. Body length 2523–2918 µ m; a 81–118; c 72.1–97.2; c' 1.12–1.63. Inner labial, outer labial, cephalic setae very short, 1.4–2.6 µ m. Amphideal fovea ovoid in outline, with horseshoe-shaped cuticular rim. Cephalic setae at level of posterior end of the amphideal fovea. One precloacal midventral supplementary seta at level of anterior endof the spicules. Character Specimens Differential diagnosis. Litinium quangi sp. n. shares the ovoid shape of the amphideal fovea having a small round aperture with L. aequale, L. curticauda, L. parmatum, L. subterraneum and Litinium sp. 1 of Quang et al. (2008) but other known species have a fovea shaped as a half moon. Litinium quangi differs from all species by having only one midventral preanal seta instead of two or more setae. The female of L. quangi differs from L. parmatum with unknown males by having smaller anterior sensilla (1.1–2.5 vs 18 µ m) and a shorter rounded tail (c' 1.12 vs 4.2, conical tail). Litinium quangi differs from the most similar and sympatric species L. sp. 1 of Quang et al. (2008) by having shorter outer labial and cephalic setae (respectively, 2.1–2.6 µ m and 1.4–2.2 µ m vs 5.2 µ m and 4.4 µ m) and one vs two midventral precloacal setae. Litinium guangi differs from L. curticauda in the number of precloacal supplementary setae and by the greater distance from the head apex to the ventral pore (68–75 µ m vs 39.5–48 µ m), shorter spicules (30–33 µ m vs 43–49 µ m), slightly longer tail (c 72.1–94.1 and c ' 1.36–1.63 vs 110–119 and 0.83–0.94, respectively). Etymology. Species name is given in honour of Dr. Quang Ngo Xuan, the first author of the paper describing several Oxystominidae species from the Can Gio mangrove forest where two unnamed Litinium species were collected.Published as part of Tchesunov, Alexei V., Thanh, Nguyen Vu & Tu, Nguyen Dinh, 2014, A review of the genus Litinium Cobb, 1920 (Nematoda: Enoplida: Oxystominidae) with descriptions of four new species from two contrasting habitats, pp. 57-74 in Zootaxa 3872 (1) on pages 60-64, DOI: 10.11646/zootaxa.3872.1.5, http://zenodo.org/record/28722
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Effects of the Big Five Personality Traits on Recreation Types - The Case of Vietnam Tourism
No full text1. Author 1 (Corresponding author):
Xuan V. Tran, Ph.D., M.B.A., C.H.A.
Associate Professor of Hospitality, Recreation, and Resort Management
The University of West Florida
11000 University Parkway, Building 85, Room 115
Pensacola, FL. 32514, USA.
Tel: 850-474-2599
Fax: 850-474-2106
Email [email protected]
Dr. Tran is interested in applications of microeconomic and consumer behavior as they relates to tourism and hospitality.
2. Author 2:
Bao Le Nguyen Vice Provost, Duy Tan University K7/25 Quang Trung, 6th Flr. Da Nang, Vietnam Tel.: (84) (511) 3-650-403 or (84) (903) 569-338 Email: [email protected]
Nguyen-Bao Le is the Vice Provost of Duy Tan University. He is in charge of the Technology & Science division as well as the R&D Institute of DTU. His educational background is in both Business Administration and Computer Science. His interests are in pedagogical surveying and development as well as big data processing.
3. Author 3:
Nguyen Cong Minh Hospitality & Tourism Faculty Duy Tan University 182 Nguyen Van Linh, Da Nang, Viet Nam Cellphone: +84 905200252 Email: [email protected] http://duytan.edu.vn/ http://vicongdong.duytan.edu.vn
Minh Nguyen is the Dean of the Faculty of Hospitality and Tourism at Duy Tan University in Da Nang, Vietnam. His faculty has the most number of Hospitality and Tourism students in the Central of Vietnam, if not of the whole South Vietnam. Minh Nguyen is also one of the leading figures which help with the promotion of tourism of Da Nang, which is widely considered as “the next Hawaii” in the world. The specialty of Minh Nguyen is in the fields of Economics and Hospitality Finance. He also gives lectures in International Finance and Service Management.Qualitative Researc
Corrigendum: ‘An analytical model of the growth of invisible bubbles on solid surfaces in a supersaturated solution’ (Chemical Engineering Science (2020) 215, (S0009250919304361), (10.1016/j.ces.2019.05.004))
No full textThe original paper (Yang et al., 2020) contains significant portions of text from the paper published in APCChE 2015 Congress incorporating Chemeca 2015, 27 Sept–01 Oct 2015, Melbourne, Victoria (Yang and Nguyen, 2015). The original text from the paper, Yang and Nguyen (2015) was used without attribution. Yang et al. (2020) extends on the original work (Yang and Nguyen, 2015), which was presented at the APCChE 2015 Congress and published in the conference proceedings. Also, one author of Yang and Nguyen (2015), Anh Nguyen, was not invited to be an author of this paper (Yang et al., 2020). Due to his contribution to the original work (Yang and Nguyen, 2015), Anh Nguyen has been added as an author of this paper and this is corrected with this corrigendum as shown above. The authors would like to apologise for any inconvenience caused
Convolutional Autoencoder for the Spatiotemporal Latent Representation of Turbulence
No full textTurbulence is characterised by chaotic dynamics and a high-dimensional state space, which make this phenomenon challenging to predict. However, turbulent flows are often characterised by coherent spatiotemporal structures, such as vortices or large-scale modes, which can help obtain a latent description of turbulent flows. However, current approaches are often limited by either the need to use some form of thresholding on quantities defining the isosurfaces to which the flow structures are associated or the linearity of traditional modal flow decomposition approaches, such as those based on proper orthogonal decomposition. This problem is exacerbated in flows that exhibit extreme events, which are rare and sudden changes in a turbulent state. The goal of this paper is to obtain an efficient and accurate reduced-order latent representation of a turbulent flow that exhibits extreme events. Specifically, we employ a three-dimensional multiscale convolutional autoencoder (CAE) to obtain such latent representation. We apply it to a three-dimensional turbulent flow. We show that the Multiscale CAE is efficient, requiring less than 10% degrees of freedom than proper orthogonal decomposition for compressing the data and is able to accurately reconstruct flow states related to extreme events. The proposed deep learning architecture opens opportunities for nonlinear reduced-order modeling of turbulent flows from data.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Aerodynamic
Author animated film
No full textKrátký animovaný film Kdyby lidé byli vejcorodí je anidok zasazený do fiktivního prostředí, čili to můžeme pojmenovat i jako animovaný mokument. Film se zabývá aktuální sociální tématikou a klade si za cíl srozumitelně přednést problematiku, která i přes vyspělost civilizace, je stále aktuální. Jako příklad mohu uvést homofobie, potraty, adopce, rovnoprávnost atd.. Anidok není častá forma vyprávění, ale v ČR se začíná formovat velice zajímavým směrem (příkladem může jít Štvanice od Michaely Režové, UMPRUM, nebo animované filmy od Diany
Cam Van Nguyen, FAMU)
Pokusila jsem se anidok pojmout jiným způsobem. Protože se dlouhodobě zabývám sociální tématikou, hledala jsem další výrazy animace. Má jít o zábavný snímek, představený jako dokumentární film, a fikcí pojmenovávající problémy dnešní civilizace. Technika je tudíž volena tak, aby kreslenou animaci prolínaly skutečné videa a použítí stopmotion animace. Technika částečně navazuje na slavného českého animátora Jana Švankmajera, který je v podobném stylu velice progresivní.ObhájenoShort animated film If people were oviparous, the anidok is set in a fictional environment, so we can also call it an animated documentary. The film deals with current social issues and aims to clearly present an issue which, despite the maturity of civilization, is still relevant. An example is homophobia, abortion, adoption, equality, etc. Anidok is not a common form of storytelling, but in the Czech Republic it is beginning to take shape in a very interesting direction (for example, Štvanice by Michaela Režová,
Cam Van Nguyen, FAMU)
I tried to take anidok differently. Because I have been dealing with social issues for a long time, I was looking for other expressions of animation. It is supposed to be an entertaining film, presented as a documentary film and a fiction naming the problems of today's civilization. The technique is therefore chosen so that the drawn animation blends the real videos and the use of stopmotion animation. The technique is partly connected to the famous Czech animator Jan Švankmajer, who is very progressive in a similar style
Dating apps for university students
No full textS rostoucí potřebou sociální interakci mezi studenty, zejména mezi zahraničními, se stává online svět stále zajímavějším místem pro budování komunity a sdílení zkušeností. Tato bakalářská práce se zaměřuje na vývoj vícejazyčné webové aplikace pro seznamování studentů vysokých škol. Cílem práce je navrhnout a implementovat aplikaci, která by pomohla studentům snadněji navazovat nové sociální vztahy. Vývoj aplikace byl řízen vodopádovým modelem, který zahrnuje fáze analýzy požadavků, návrhu, implementace, testování a nasazení. Konkrétně jsou v práci použity technologie jako Vue3.js, SASS, TailwindCSS, Axios, Typescript, Vuetify, C#, .NET, Entity Framework a LINQ. Práce obsahuje sedm kapitol, které pokrývají různé aspekty vývoje a implementace aplikace. Každá kapitola se detailně věnuje určitému tématu, včetně analýzy požadavků, návrhu architektury, implementace back-endu a front-endu, testování a nasazení aplikace do provozu. Přímo na návrhu uživatelského rozhraní a marketingové části aplikace autor spolupracoval s externím grafickým designérem, což přispělo k profesionálnějšímu vzhledu a uživatelsky přívětivému prostředí. Výsledkem této práce je plně funkční webová aplikace s názvem studate, dostupná na adrese studate.eu, která umožňuje studentům vysokých škol z různých zemí navazovat nové sociální kontakty prostřednictvím online prostředí. Autor této práce hodlá spustit aplikaci do běžného provozu a propagovat ji mezi různými univerzitami v evropských zemích.With the growing need for social interaction among students, especially international students, the online world is becoming an increasingly interesting place to build community and share experiences. This bachelor thesis focuses on the development of a multilingual web application for introducing university students. The aim of the thesis is to design and implement an application that would help students to establish new social relationships more easily. The development of the application was guided by a waterfall model that includes the phases of requirements analysis, design, implementation, testing and deployment. Specifically, the technologies used in this work include Vue3.js, SASS, TailwindCSS, Axios, Typescript, Vuetify, C#, .NET, Entity Framework, and LINQ. There are seven chapters in the thesis that cover different aspects of application development and implementation. Each chapter covers a specific topic in detail, including requirements analysis, architecture design, back-end and front-end implementation, testing, and deploying the application into production. The author collaborated directly with an external graphic designer on the user interface design and marketing part of the application, which contributed to a professional look and user-friendly environment. The result of this work is a fully functional web application called studate, available at studate.eu, which allows university students from different countries to make new social contacts through an online environment. The author of this thesis intends to launch the application into regular operation and promote it among different universities in European countries
Application for collecting of suggestions from the inhabitants of Letohrad city
No full textTato bakalářská práce řeší elektronizaci komunikace mezi městem Letohrad a jejími obyvateli. Konkrétně se jedná o komunikaci za účelem hlášení závad. Dnes již téměř každý člověk v produktivním věku vlastní chytrý mobilní telefon. Proto je vhodnější nabídnout občanům hlásit problémy přímo z jejich mobilních telefonů namísto osobní či telefonické komunikace. Nyní již existuje řešení webového formuláře pro hlášení závad, které občané ale nevyužívají. Cílem této práce je vytvořit mobilní aplikaci pro sběr hlášení závad od obyvatel města Letohrad ve frameworku React Native.Analýza požadavků na aplikaci je konzultována se zástupcem města Letohrad. Součástí práce je rešerše existujících řešení, na základě jejíž výsledků je přizpůsoben návrh vlastní aplikace. Práce je rozdělena do čtyř hlavních kapitol, které čtenáře provádí způsobem dosažení cíle zvoleného autorem práce.Nejprve je v práci řešena analýza problému, která zahrnuje rešerši a požadavky na samotnou aplikaci. Na základě realizované rešerše a definovaných požadavků je v práci navržena mobilní aplikace, která je následně implementována za využití frameworku React Native. Součástí kapitoly návrhu je popis technologií potřebných k vývoji aplikace. Poslední kapitola práce se zaměřuje na testování aplikace užitím uživatelského testování použitelnosti.Výsledkem této práce je funkční aplikace nazvaná Hlášení závad Letohrad dostupná v online obchodě Google Play.This bachelor thesis deals with electronic communication between the city of Letohrad and its citizens. It is specifically about communication of fault reports. Nowadays almost every person in productive age owns smartphone. Therefore, it is preferable to let citizens report faults directly from their smartphones instead of personal or telephone communication. There is already a solution in form of website for fault reporting but is not used frequently by citizens. The aim of this thesis is to develop a mobile app for gathering fault reports from citizens of Letohrad city, using React Native framework.Analysis of app requirements is consulted with the Letohrad city representative. Part of the work is a research of existing solutions and adapting the application design, based on its results. This thesis is divided into four main chapters, guiding the reader through the means of reaching the goal set by the author of this thesis.First chapter is analysis of the problem, which includes research and requirements for the app itself. In the second chapter, based on the realized research and defined requirements, is designed a mobile app, which is subsequently implemented by using React Native framework. Part of the chapter of the design, is description of technologies needed to develop the app. Last chapter focuses on testing the app, using usability testing.The result of this thesis is a working app called Hlášení závad Letohrad which is available on Google Play store
Vietnamese on the Czech labor market
No full textBakalářská práce se zabývá analýzou vietnamské národnostní menšiny v České republice. Autor se zaměří na rozdíly mezi první generací, která do ČR emigrovala již v dospělosti, a druhou generací, která se v ČR již narodila. Samotná práce je rozdělena do pěti kapitol. První čtyři kapitoly jsou věnovány teoretické části, kde se čtenář seznámí s Vietnamem, vietnamskými migračními vlnami a dnešní vietnamskou komunitou v Česku. Pátá kapitola je věnována vlastnímu výzkumu autora, kde jsou na základě dotazníkového šetření a polostrukturovaných rozhovorů porovnávány dvě generace Vietnamců v ČR. Hlavním cílem práce je porovnat první a druhou generaci Vietnamců v České republice se zaměřením na pracovní trh.The bachelor thesis analyzes the Vietnamese national minority in the Czech Republic. The author focuses on the differences between the first generation, who emigrated to the Czech Republic as adults, and the second generation, born in the Czech Republic. The thesis itself is divided into five chapters. The first four chapters go through the theoretical part, where the reader is introduced to Vietnam, Vietnamese migration waves, and the Vietnamese community in the Czech Republic. The fifth chapter consists of the author’s research, where two generations of Vietnamese in the Czech Republic are compared based on a questionnaire survey and semi-structured interviews. The main aim of the thesis is to compare the first and second generation of Vietnamese in the Czech Republic with a focus on the labor market
Efficiency and effort analysis of automated and manual application testing
No full textThis bachelor's thesis analyses the efficiency and effort of automated and manual application testing in a specific company. The subject of analysis is further specified to regression testing in regular releases. Methods used include systematic literature review, unstructured interviews, comparison, analysis, and discussion. Through analysis, metric calculation, and interpretation, the efficiency of tests, defect acceptance, testing effort, automation coverage, and success of automated tests were determined. Based on these findings, the author provides suggestions for improving the monitored processes in the studied company, specifically updating test cases or more thorough documentation of automated testing. The thesis also includes a discussion by the author, focusing on a retrospective of the methods used and the way the objectives were achieved, or not achieved.Bakalářská práce analyzuje efektivitu a pracnost automatizovaného a manuálního testování aplikací v konkrétní společnosti. Předmět analýzy je dále specifikován na regresní testování v pravidelných releasech. K řešení jsou použity metody systematické rešerše literatury, nestrukturovaných rozhovorů, komparace, analýzy a diskuze. Analýzou, výpočtem metrik a interpretací je zjištěna efektivita testů, akceptace defektů, pracnosti testování, míra automatizace nebo úspěšnost automatizovaných testů. Na základě těchto zjištění autor poskytuje návrhy na zlepšení sledovaných procesů ve zkoumané společnosti, jmenovitě aktualizaci testovacích případů nebo pečlivější dokumentaci automatizovaného testování. Součástí práce je také diskuze autora, jejímž předmětem je retrospekce k užitým metodám práce a způsobu dosažení cílů práce, případně jejich nedosažení
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