Índice geométrico e perda de carga localizada em conexões de emissores "online"

O objetivo deste artigo é apresentar um estudo envolvendo uma relação entre a perda de carga localizada em conexões de emissores em tubulações, com diferentes diâmetros, utilizados em irrigação localizada, com a geometria dos conectores de emissores "online", que permite a fácil quantificação dessas perdas de carga, uma vez conhecida a dimensão dos conectores. O experimento foi conduzido para Números de Reynolds no intervalo de fluxo turbulento, obtidos pela variação da vazão nos tubos a uma temperatura constante da água. Para os tubos considerados, os resultados da investigação indicaram que o fator de atrito da equação de Darcy-Weisbach pode ser estimado pela Equação de Blasius com os coeficientes b = 0,300 e m = 0,25 para a determinação da perda de carga nos tubos avaliados. As perdas de carga provocadas pelas conexões dos emissores nos tubos considerados aumentaram em até 62% em relação às observadas nos tubos sem emissor. Uma relação entre o coeficiente de carga cinética (K) e o índice de obstrução devido à conexão do emissor "online" (IO) no tubo é apresentada por uma relação algébrica do tipo potência, com coeficiente de ajuste de, aproximadamente, 96%.

Haja-asutusalueiden pienjätevedenpuhdistamoiden online-monitoroinnin kehitysmahdollisuudet

The aim of this Bachelor's thesis was to investigate potentialities of online-monitoring the efficiency of small scale wastewater treatment systems. Evolving legislation currently sets minimum boundaries of relative decrease in levels of phosphorus, nitrogen and BOD in abovementioned applications, yet no monitoring requirements for such systems are determined. Inherently, no applicable monitoring system for these parameters exist. However, some measuring methods offer potentialities for estimating the reduction of these certain parameters in a wastewater stream treated in a small scale system. Such methods could be found for example among electronic noses, measuring of electronic conductivity or turbidity.

Influence of Link Structure on Search Engine Result Pages of Online Nursery Shops

The primary objective of this thesis is to assess how the backlink portfolio structure and off site Search Engine Optimisation (SEO) elements influence ranking of UK based online nursery shops. The growth of the internet use demanded significant effort from companies to optimize and increase their online presence in order to cope with the increasing online competition. The new e-Commerce technology - called Search Engine Optimisation - has been developed that helped increase website visibility of companies. The SEO process involves on site elements (i.e. changing the parameters of the company's website such as keywords, title tags and meta descriptions) and off site elements (link building and social media marketing activity). Link Building is based on several steps of marketing planning including keyword research and competitor analysis. The underlying goal of keyword research is to understand the targeted market through identifying relevant keyword queries that are used by targeted costumer group. In the analysis, three types (geographic, field and company’s strategy related) and seven sources of keywords has been identified and used as a base of analysis. Following the determination of the most popular keywords, allinanchor and allintitle search has been conducted and the first ten results of the searches have been collected to identify the companies with the most significant web presence among the nursery shops. Finally, Link Profiling has been performed where the essential goal was to understand to what extent other companies' link structure is different that the base company's backlinks. Significant difference has been found that distinguished the top three companies ranking in the allinanchor and allintitle search. The top three companies, „Mothercare”, „Mamas and Papas” and „Kiddicare” maintained significantly better metrics regarding domain and page authority on the main landing pages, the average number of outbound links for link portfolio metric and in number of backlinks. These companies also ranked among the highest in page authority distribution and followed external linking.

Media Library Online (MLOL). Business Models for E-Book Lending in Libraries

Esitys Kirjastoverkkopäivillä 23.10.2012 Helsingissä

Das ADOK-Projekt : Automatisierung und Deutsch im Online-Kurs

Julkaisumaa:CZE

A bridge between engineering and language learning : automation and German in an online course

Artikkeli luettavissa osassa: Part 2. - ISBN 9789522163172(PDF). - Liitteenä työpaperi

Valaiseva etnografia Helsingin huumemarkkinoista

Kirjallisuusarvostelu

The role of emotional state, sexual arousal, and alcohol intoxication as situational factors associated with adults’ online sexual contact with children and adolescents

In the present study we explored whether and how the situational factors; emotional states, sexual arousal, and alcohol intoxication influenced the propensity in adults to engage in online sexual contact with children (13 or younger) and adolescents (14 – 17 year olds). The results were compared to a group of adults that had engaged in online sexual contact with adults only (18 or older). We also looked at the variation over time within these situational factors during the online sexual contact with a child, an adolescent, or an adult. The present study was an online self-report survey to the adult populations in Finland, Sweden, and Germany, with a final sample (N = 776) of women and men who were active on the Internet. The participants were asked to report whether, how, and with whom they had engaged in online sexual contact. The results showed that more men than women reported online sexual contact with persons of all age groups, and that the situational factors; emotional states and sexual arousal influenced the propensity in both women and men to engage in online sexual contact with children and adolescents. However, the effects of alcohol intoxication were small and significant only for men. These results indicate that higher levels of emotional state and sexual arousal might increase the propensity to go against social norms and contact children and adolescents online for sexual purposes, but it can also imply that that those who look for online sexual contact online with children and adolescents, are more emotionally and/or sexually aroused than the group that only seek adult company or that these are post-hoc explanations for such sexual activities.

Older Consumers’ Adoption of Online Shopping

The thesis is concerned with the online shopping behavior of older adults, who in this study are at least 60 years old. At the moment, the population is ageing and consumers are buying more and more via the Internet. The objective of the thesis is to understand the large group of older adults in Finland as online customers.The study explores older consumers’ adoption of online shopping with a qualitative research, and it is situated in the research tradition of hermeneutic phenomenology. Phenomenology focuses on the life-world of people. The empirical data was collected by three focus groups with 13 participants altogether. The focus group conversations brought forth that there is not tremendous difference in the motives of older consumers to shop online compared to other age groups. The study strengthened the previous conception of a change toward more ageless market. However, online stores should be designed to accommodate some special needs of older consumers as they occasionally struggle with the logic of websites. Finnish older consumers have adopted online shopping because of perceived convenience and because of tolerable perceived risk during first online shopping experience. Positive experiences strengthen positive attitude toward electronic channel.