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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Penzion / Guesthouse

Petrlík, Daniel January 2017 (has links)
The subject of this diploma thesis is a project of guesthouse. The building is situated in moderate slope terrain in cadastral territory Hlinsko v Čechách. Guest house capacity is 46 beds. Guesthouse has three floors and is designed from the structural system Porotherm. The ceilings are made of reinforced concrete joined with stiffening reinforced concrete wreath. The roofs of the house are built as saddle roof. In the first floor there is located main entrance, reception desk and restaurant with facilities. In the second and third floor there are rooms for guests
152

Explicit treatment of hydrogen bonds in the universal force field: Validation and application for metal-organic frameworks, hydrates, and host-guest complexes

Coupry, Damien E., Addicoat, Matthew A., Heine, Thomas 19 June 2018 (has links)
A straightforward means to include explicit hydrogen bonds within the Universal Force Field (UFF) is presented. Instead of treating hydrogen bonds as non-bonded interaction subjected to electrostatic and Lennard-Jones potentials, we introduce an explicit bond with a negligible bond order, thus maintaining the structural integrity of the H-bonded complexes and avoiding the necessity to assign arbitrary charges to the system. The explicit hydrogen bond changes the coordination number of the acceptor site and the approach is thus most suitable for systems with under-coordinated atoms, such as many metalorganic frameworks; however, it also shows an excellent performance for other systems involving a hydrogen-bonded framework. In particular, it is an excellent means for creating starting structures for molecular dynamics and for investigations employing more sophisticated methods. The approach is validated for the hydrogen bonded complexes in the S22 dataset and then employed for a set of metal-organic frameworks from the Computation-Ready Experimental database and several hydrogen bonded crystals including water ice and clathrates. We show that the direct inclusion of hydrogen bonds reduces the maximum error in predicted cell parameters from 66% to only 14%, and the mean unsigned error is similarly reduced from 14% to only 4%. We posit that with the inclusion of hydrogen bonding, the solvent-mediated breathing of frameworks such as MIL-53 is nowaccessible to rapid UFF calculations, which will further the aim of rapid computational scanning of metal-organic frameworks while providing better starting points for electronic structure calculations.
153

Penzion Solanec / Guesthouse Solanec

Šrámek, Jakub January 2022 (has links)
The diploma thesis on the topic of pension Solanec is processed at the level of documentation for the construction. The building is rectangular shape and contains a basement and three floors. The building will serve as a restaurant and guest house. The guest house contains nineteen double rooms and four quadruple rooms. A structural system of the building is brick, combined and consists of a permanent formwork in the basement and in the above floor is ceramic blocks of the type of THERM. The roof structures are designed as monolithic reinforced concrete slabs. The building is roofed by a saddle and pitched roof, formed by a truss system. The building is insulated with the ETICS system.
154

socialbnb : A Qualitative Study on Host-Guest Interactions and Tourism Social Entrepreneurship

Casanova, Silvia January 2022 (has links)
This qualitative study looks at host-guest interaction facilitated by the phenomenon of tourism social entrepreneurship through the lens of emotional solidarity. Social entrepreneurship is arguably the social innovation that tourism needs and has become an alternative strategy to develop tourism in host communities with the potential to create positive community change. However, the literature on combining sharing  economy, social or community entrepreneurship and emotional solidarity is scarce. Therefore, this study analyses host-guest interactions facilitated through the socialstart-up socialbnb. Findings from this study indicate that there are at least two crucial criteria forsustainable tourism development and positive community change. First, social entrepreneurship should create and facilitate tourism structures and networks, which avoid the negative impacts of tourism to the residents and instead create social,ecological, and economic benefits for the local community. Perhaps, focusing on theneeds of the local community and creating beneficial host-guest relationships is themost effective way to promote tourism development that is supported by residents.Thus, social entrepreneurship should not only act as a facilitator between guests and the local community but also consider the residents’ attitudes towards tourism development and the actual economic need for tourism in the destination, especially in the Global South.
155

Separation of Perrhenate and Perfluoroalkyl Substances by Ion Chromatography with Customized Stationary Phases

Chan, Wai Ning 16 August 2023 (has links) (PDF)
Ion exchange chromatography (IC) is an analytical technique used to separate charged molecules including ions, proteins, small nucleotides, and amino acids. It can function in anion or cation mode. In this dissertation, anion exchange chromatography was used, and column materials were made in our lab with resorcinarene-based compounds called cavitands. Cavitands create cavities to bind to molecules because of their three-dimensional structure. Two new gradient IC methods were established to identify and quantify perrhenate and perfluoroalkyl substances (PFAS) by customized resorcinarene-based column, zinc cyclen resoecinarene (ZCR) and arginine methyl ester (RUE) columns. The ZCR column accomplished outstanding separation of perrhenate from other anions such as chloride and sulfate by using a gradient elution of 2-60 mM NaOH. There was a logarithmic relationship between the perrhenate concentration and its retention time. In addition to separating anions, the ZCR column was able to preconcentrate perrhenate with over 90% recovery in different conditions. RUE was successfully synthesized and attached to polystyrene resin and used in IC to separate the PFAS, perfluorobutanoic acid (PFBA), perfluoropentanoic acid (PFPeA), perfluorobutanesulfonic acid (PFBS), perfluorohexanoic acid (PFHxA), perfluorohexanesulphonic acid (PFHxS), and perfluorooctanoic acid (PFOA). The sample preparation for the PFAS was simple and only needed filtration. A gradient method starting with 70 mM NaOH and going to pure water was necessary to separate the PFAS. There was no detectable PFAS in Provo tap water and Utah Lake water by our method. Although the LOD and LOQ of PFAS were not as low as the existing methods, the IC method does not require complicated sample preparation steps to separate and quantify PFAS. Binding studies of RUE and RUA were done with organic acids, including citric, malic, and succinic acid, and PFAS including PFBA, and PFHxA. The strongest binding was for L-malic acid followed by succinic acid, D-malic acid, pentanoic acid, citric acid, and dimethyl L-malate. RUE displayed some chiral recognition between L-malic acid and D-malic acid. Unfortunately, it did not show significant differences in binding between the different PFAS even though RUE had been able to separate them by IC.
156

Self-Assembled Host-Guest Thin Films for Functional Interfaces

Erdy, Christine 29 December 2008 (has links)
The functionalization of surfaces has received attention because the process allows the design and tailoring of substrate surfaces with a new or improved function. "Host-guest" thin film complexes are composed of "host" molecules attached the substrate surface, either through physisorption or covalent bonds, with cavities for the inclusion of desired "guest" molecules for the functionalization of the surface. Two methods for fabricating functional "host-guest" thin films were investigated: Langmuir-Blodgett (LB) deposition and self-assembly monolayer (SAM). Langmuir films were created at the air-water interface using octadecanesulfonic acid (C18S) as the amphiphilic "host" molecules separated by hydrophilic guanidinium (G) spacer molecules, which created a cavity allowing the inclusion of desired "guest" molecules. Surface pressure-area isotherms of the (G)C18S, with and without guests, are characterized by the lift-off molecular areas and are use to determine the proper deposition surface pressure. "Host-guest" Langmuir films are deposited onto silicon substrates using the LB deposition technique. The LB films were then subjected to stability testing using different solvents over increasing periods of time. Grazing-angle incidence X-ray diffraction (GIXD), specular X-ray reflectivity (XRR) and transfer ratio measurements were used to characterize the crystallinity, film thickness, overall film stability and film coverage. The GIXD data revealed that the crystallinity of the deposited film varies with the "guest" molecules and can be disrupted by the functional group on the "guest" molecule through hydrogen bonding. After modeling the XRR data using StochFit, it was discovered that the more polar solvent, tetrahydrofuran (THF), removed the film completely while the nonpolar solvent, hexane, compacted the thin film and increased the electron density. With transfer ratios around 0.95 to 1.05, the deposited films were homogenous. The second method used was self-assembly monolayers, which differs from Langmuir films in that they are created by a spontaneous chemical synthesis from immersing a substrate into a solution containing an active surfactant. Octadecyltrichlorosilane (OTS) was used initially as a molecule to study the self-assembled monolayer procedure. To study a "host-guest" self-assembled monolayer system, a compound is being synthesized from 9-bromoanthracene. This compound would already contain the cavity necessary for the inclusion of "guest" molecules. The solution that contained OTS was composed of a 4:1 mixture of anhydrous octadecane: chloroform. Silicon substrates with a deposited oxide layer were hydroxylated for the surfactant binding chemical reaction to occur. The OTS SAMs were exposed to the same stability tests as the LB films. Surface contact angle measurements were taken of the OTS SAMs before and after the stability tests. The contact angle prior to the stability tests was 110° (±2°). The contact angle after immersion in THF was 101° (±2°) while the contact angle resulting from immersion in hexane was 105° (±2°). From the contact angle measurements, the degradation of the OTS SAMs was less extensive than that of the (G)C18S LB films. / Master of Science
157

Gästforskare - en osynlig profession : Utmanningar och möjligheter vid Linköpings universitet / Guest researcher - an invisible profession : Challenges and possibilities at Linkoping University

Uhlin, Anna Maria, Johansson, Irene January 2022 (has links)
Syftet med studien har varit att synliggöra och analysera professionen gästforskare. Attkunna bidra med ökad förståelse och kunskap. Vi har utgått från två frågeställningar:Vad innebär professionen gästforskare? och Hur upplever gästforskare sitt arbete ochsin arbetsmiljö? Studien har utgått från ett interpretativistiskt perspektiv med enhermeneutisk inriktning.Studien utfördes vid två institutioner vid Linköpings universitet med en årliggenomströmning av cirka 80 till 100 gästforskare. För att nå en djupare kunskap harstudien antagit en kvalitativ ansats med intervjuer som datainsamlingsmetod.Resultatet visar att gästforskare upplever sin profession som både utvecklande ochinspirerande kunskapsmässigt. Det visar även på det engagemang de känner inför sinprofession, sitt arbete, som gästforskare.Nyckelord: gästforskare, Guest Researcher, profession
158

Change in guest behavior during the COVID-19 pandemic : Research study of health spa hotels in Slovakia

Madunická, Veronika January 2022 (has links)
The global tourism and hotel industry have been among the fastest-growing sectors for years. However, the global pandemic of COVID-19 caused extreme disruption and changed the situation all around the globe. The global COVID-19 pandemic did not only leave an imprint on economic sectors all over the world but also caused changes in the everyday lives of people. Implemented travel restrictions and self-isolation have resulted in workforce reductions in all economic sectors and job losses impacting individuals, organizations, and countries globally. With regard to the hotel industry, the crisis has led to an immense number of cancellations and a loss of foreign clientele. The situation has altered and the behavior of guests has changed accordingly. This research aims to investigate the impact of the COVID-19 pandemic on guest behavior and its consequences. To achieve this aim, a mixed methods research approach consisting of 2 stages of empirical study is employed. The qualitative method in the form of email interviews was aimed at the hotel staff of 5 chosen health spa hotels in Slovakia where 9 employees were asked questions about the impact of COVID-19 on the hotel industry and guest behavior from a hotel employee’s perspective. The collected data were analyzed by using thematic analysis. The quantitative method was used to investigate the impact of the global pandemic from hotel guests’ points of view themselves. The second part of the research therefore involves 100 participants of an online survey about guest behavior during the pandemic, change in values and behavior patterns. The findings proved that there is a significant change in guest behavior induced by the COVID-19 pandemic and its consequences. Furthermore, the aftermath of adopted behaviors has been identified, including the change in the booking process, difficulties in rules compliance, and main differences in hotel stays before and during the pandemic.
159

Discussing Molecular Baskets in the Universe of Paradox and Current State of Affairs in the Field of Molecular Nanodevices

Pavlovic, Radoslav 05 October 2022 (has links)
No description available.
160

AN INVITED INTRUSION: EXAMINING TERRITORIALITY IN P2P ACCOMMODATIONS FROM THE GUEST PERSPECTIVE

Wang, Yuan January 2018 (has links)
This dissertation aims to understand the role of territoriality in peer-to-peer (P2P) accommodation guest experience by answering four questions: (1) How do P2P accommodation guests feel about staying in P2P accommodation rentals as a territorial complexity? (2) What factors influence P2P accommodation guests’ perceptions of being in P2P accommodation rentals? (3) What kinds of territorial behaviors do guests experience from hosts in P2P accommodation rentals? How does host territoriality affect P2P accommodation guest experiences? (4) Do guests engage in territoriality in P2P accommodation rentals? If so, what territorial behaviors do guests use? A convergent mixed-methods design was used to answer these questions based on two studies: a qualitative study intended to develop an overall understanding of territoriality in P2P accommodation guest experiences (Study 1); and a scale development and validation study intended to develop a scale of perceived host territoriality in P2P accommodation settings (Study 2). Study 1 followed the procedures of interpretative phenomenological analysis, including semi-structured interviews with 13 P2P accommodation guests. Interview transcripts were analyzed to identify themes related to territoriality in P2P accommodation guest experiences. Results of Study 1 show that P2P accommodation guests possessed two territorial senses while staying in a shared rental: a sense of being in others’ territory and a sense of being in their own territory. Feelings associated with staying in others’ territory vs. their own territory were identified. Eight sets of factors were found to influence territorial senses, including home amenities and facilities, personal items/décor items, length of stay/use, physical presence of the host, entire rental vs. private rental, disturbance from others, hospitableness of the host, and travel companionship. Multiple factors that enhanced P2P accommodation guests’ sense of being in others’ territory were related to host territoriality. A closer examination of host territoriality revealed six types of host territoriality: personalization of the rental, house rules, accessibility, intrusion, hands-on hosting, and service failure. Guests’ reactions toward host territoriality fell into four categories: adaption, assertive defense, appeal, and avoidance. The impacts of host territoriality on guests’ evaluations of hosts, evaluations of their P2P accommodation experiences, and future use of P2P accommodations varied depending on guests’ reactions and attributions of host territoriality. P2P accommodation guests were also found to need their own space in P2P accommodation rentals. Influenced by this need and a sense of being in their own territory, P2P accommodation guests sometimes also engaged in territoriality to construct, communicate, and defend their territories. Guests’ territorial behaviors included personalization of the rental, exploration of the rental, giving instructions to others, and defending against territorial intrusions. Following an eight-step scale development procedure, Study 2 developed and validated a scale of perceived host territoriality in P2P accommodations. An initial list of scale items was generated from an online survey with open-ended questions (N = 116), independent coding of survey responses, and examples identified in Study 1. An expert panel (N = 5) and a panel of P2P accommodation guests (N = 26) were hired to assess the content validity of the original scale. A pilot study was conducted for initial scale validation (N = 93), after which the wording of scale items was modified. An online survey for scale purification and refinement was then conducted (N = 911). The dataset was split into a developmental sample and a validation sample to conduct exploratory factor analysis and confirmatory factor analysis, respectively. After scale purification, a second dataset was collected to validate the scale (N = 603). The final version of the scale included 18 items and four dimensions: Accessibility, House Rules, Signs of Ownership, and Intrusion. Known-group comparisons and criterion-related validity assessment confirmed the validity of the scale. Specifically, P2P accommodation guests who stayed in a private-room rental reported higher levels of host territoriality than those staying in an entire rental. Experiences of host territoriality were negatively correlated with perceived control, perceived self-efficacy, and personal sense of power among P2P accommodation guests. The newly developed scale was used to examine the impact of perceived host territoriality on perceived warmth and competence of P2P accommodation hosts, guests’ experience satisfaction, and guests’ behavioral intentions via a second-order structural equation model. Perceived host territoriality was negatively associated with perceived warmth and competence of P2P accommodation hosts, satisfaction with the P2P accommodation experience, and intention to reuse/recommend a P2P accommodation rental. However, dimensions of host territoriality had varying impacts on guest experience; host territoriality via signs of ownership and house rules positively influenced P2P accommodation guest experiences. A conceptual framework of territoriality in P2P accommodation guest experiences was proposed based on the findings of this dissertation, describing relationships among territorial senses, factors influencing territorial senses, host territoriality, guest reactions to host territoriality, and guest territoriality. Theoretical implications of these results on P2P accommodation research, human territory and territoriality research, and tourism and hospitality research were discussed, followed by implications regarding P2P accommodation platforms, hosts, and guests as well as management of guest experiences in other hospitality service encounters. / Business Administration/Interdisciplinary

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