Search results for " Sam"

showing 10 items of 1096 documents

Design and analysis of discrete choice experiments for models with response time

2013

Settore SECS-S/02 - Statistica Per La Ricerca Sperimentale E TecnologicaA sector of conjoint analysis (experimental design in marketing research) is made of the so called choice experiments. In choice experiments respondents undergo a questionnaire which is nowadays mostly submitted through the internet. The questionnaire proposes to the respondent a sequence of choice sets each one including two or more profiles being a profile a specific combination of attribute levels. The respondent selects the preferred profile for each choice set. Responses given by a sample of respondents are analysed through suitable methods aimed to eventually find the best combination of attribute levels. One method of analysis adopts the Multinomial Logit (MLN) model. In this article the authors show the results of the MLN analysis compared with another model of analysis which uses an additional response which can be easily recorded by electronically submitted questionnaires. In practice modern survey platforms like “Qualtrics” (the one used for this work) can record the so called “response latency” i.e. the time taken by the respondent to make the choice and select the most preferred profile in the choice set. Thanks to a response latency model further refined in this work it is possible to deduce the relative weight of importance of the profiles for each choice set and respondent. This type of response can be used in place of the dichotomous choice variable in the MLN model. The two models and methods of analysis are deeply compared and it is critically discussed when it is better to use one or the other method. As a result a more reliable estimate of the optimal profile comes up implying lower risks for new investments and marketing decisions.
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A Proposal to estimate the roaming–dog Total in an urban area through a PPSWOR spatial sampling with sample size greater than two

2018

Settore SECS-S/05 - Statistica SocialeDogs roaming in urban areas constitute an issue for public order hygiene and health. Proper planning of actions for health and security control and allocation of financial funds require the knowledge of the roaming–dog–population size in a given urban area. Unfortunately a reliable statistical procedure aimed to measure such population is not available yet in literature. This paper presents a simple reproducible survey sampling procedure to estimate the number of roaming dogs in an urban area through the description of a real study carried out on a restricted area of the city of Palermo in southern Italy. A sample of areas is drawn by means of a drawn–by–drawn spatial sampling with probabilities proportional to size and without replacement (PPSWOR). As inclusion probabilities are not available in closed form they are estimated by Monte Carlo approach which is of simple implementation and permits design–based variance estimation even when first–order inclusion probabilities are unknown.
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Survey, tourism

2015

A survey is any organized and methodical activity that directly collects information on motivations, opinions, and behaviors about the characteristics of a given population, including tourists and residents of a destination. This article provides a description of the stages required when implementing a survey, for the Encyclopedia of Tourism, placing peculiar attention to the context of tourism.

Settore SECS-S/05 - Statistica SocialeTourism Statistics Survey Methodology Sampling
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Dzimumu līdztiesība darba tirgū vērsta uz sieviešu tiesībām Latvijā un Amerikas Savienotajās Valstīs

2017

Grandaua M. Dzimumu līdztiesība darba tirgū vērsta uz sieviešu tiesībām Latvijā un ASV: diplomdarbs. Rīga: Latvijas Universitātes Biznesa, vadības un ekonomikas fakultāte, 2017. 89 lpp. Tajā iekļautas 7 tabulas, 19 attēli un izmantotā literatūra ietver 74 avotus. Dzimumu nevienlīdzība ir aspekts, kas ietekmē daudzas valstis. ASV valda samērā liela dzimumu nevienlīdzība, it īpaši darba samaksas jautājumā – vīrieši par vienu un to pašu darbu saņem vairāk nekā sievietes. Latvijā savukārt dzimumu nevienlīdzība nav temats, par kuru aktīvi tiek informēta sabiedrība, tāpēc ar šo pētījumu darba autore vēlējās noskaidrot patieso situāciju dzimumu līdztiesībā sieviešu tiesību jomā gan ASV, gan arī La…

Sieviešu tiesībasDiskriminācijaDarba samaksaEkonomikaDarba samaksas atšķirībaDzimumu līdztiesība
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A Spatial-Temporal Correlation Approach for Data Reduction in Cluster-Based Sensor Networks

2019

International audience; In a resource-constrained Wireless Sensor Networks (WSNs), the optimization of the sampling and the transmission rates of each individual node is a crucial issue. A high volume of redundant data transmitted through the network will result in collisions, data loss, and energy dissipation. This paper proposes a novel data reduction scheme, that exploits the spatial-temporal correlation among sensor data in order to determine the optimal sampling strategy for the deployed sensor nodes. This strategy reduces the overall sampling/transmission rates while preserving the quality of the data. Moreover, a back-end reconstruction algorithm is deployed on the workstation (Sink)…

Signal Processing (eess.SP)FOS: Computer and information sciencesAdaptive samplingGeneral Computer ScienceComputer sciencespatial-temporal correlationReal-time computing02 engineering and technologyData loss[INFO.INFO-SE]Computer Science [cs]/Software Engineering [cs.SE]data reconstructionQA76Computer Science - Networking and Internet Architecture[INFO.INFO-IU]Computer Science [cs]/Ubiquitous Computing[INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR]FOS: Electrical engineering electronic engineering information engineering0202 electrical engineering electronic engineering information engineeringGeneral Materials ScienceElectrical Engineering and Systems Science - Signal ProcessingNetworking and Internet Architecture (cs.NI)General EngineeringSampling (statistics)020206 networking & telecommunicationsReconstruction algorithmDissipation[INFO.INFO-MO]Computer Science [cs]/Modeling and SimulationWireless sensor networks[INFO.INFO-MA]Computer Science [cs]/Multiagent Systems [cs.MA]data reduction020201 artificial intelligence & image processing[INFO.INFO-ET]Computer Science [cs]/Emerging Technologies [cs.ET]lcsh:Electrical engineering. Electronics. Nuclear engineering[INFO.INFO-DC]Computer Science [cs]/Distributed Parallel and Cluster Computing [cs.DC]lcsh:TK1-9971Wireless sensor networkData reduction
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Supporting Inter-Agency Collaboration in Emergency Management: Recurring Challenges Relevant for CSCW

2023

Emergency management requires effective collaboration between different agencies. This work implies several challenges due to a heterogeneous mix of actors with different procedures, practices, and support tools. Despite being focused in various research streams, emergency responders still report challenges with sharing information and establishing shared situational awareness in responding to complex events. The paper presents results from a large-scale digital tabletop exercise that illustrate recurring challenges related to support for collaborative procedures, a communication network structure combining several media, use of geocollaborative tools, and configuration of collaborative env…

Situational awarenessCross-sector collaborationEmergency ManagementTverrsektorielt samarbeidVDP::Information and communication systems: 321BeredskapsledelseCSCWVDP::Informasjons- og kommunikasjonssystemer: 321Situasjonsforståelse
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Biological tolerance of different materials in bulk and nanoparticulate form in a rat model: sarcoma development by nanoparticles

2006

In order to study the pathobiological impact of the nanometre-scale of materials, we evaluated the effects of five different materials as nanoparticulate biomaterials in comparison with bulk samples in contact with living tissues. Five groups out of 10 rats were implanted bilaterally for up to 12 months with materials of the same type, namely TiO 2 , SiO 2 , Ni, Co and polyvinyl chloride (PVC), subcutaneously with bulk material on one side of the vertebral column and intramuscularly with nanoparticulate material on the contralateral side. At the end of each implantation time, the site was macroscopically examined, followed by histological processing according to standard techniques. Malign…

Skin NeoplasmsSilicon dioxideBiological; tolerance; different; materials; bulk; nanoparticulate; rat model; sarcoma; development; nanoparticlesRat modelBiomedical EngineeringBiophysicsNanoparticleMetal NanoparticlesBioengineeringBiocompatible MaterialsBiochemistryPreneoplastic lesionBiomaterialschemistry.chemical_compoundNickelBulk samplesMaterials TestingmedicineAnimalsPolyvinyl ChlorideTitaniumSarcomaCobaltmedicine.diseaseSilicon DioxideRatsPolyvinyl chloridechemistrySarcomaImplantation timeBiotechnologyBiomedical engineeringResearch Article
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Measuring expectation for an affordance gap on a smartphone user interface and its usage among older adults

2020

The smartphone has become a ubiquitous mobile communication tool that plays a crucial role in the daily lives for Malaysian older adults. However, it is not easy for older adults to learn new interaction modes and adopt the smartphone user interface. In this paper, we aim to examine the affordances of a smartphone user interface and its usage by older adults through the lens of Norman’s execution/evaluation action cycle (EEAC) framework. A mobile-user interaction study was administered with four tasks. A paired sample t-test was conducted to analyze the affordance gap between different levels of expectation. The results revealed that three tasks (making phone calls, adding contacts, and usi…

Social Psychologybusiness.industryComputer scienceCommunicationMobile appsexecution/evaluation action cyclekäyttöaffordanceThrough-the-lens meteringälypuhelimetHuman-Computer InteractionPaired samplesPhoneHuman–computer interactionodotuksetsmartphone user interfaceMobile telephonyEvaluation - actionUser interfacebusinessAffordanceexpectationolder adultsaikuiset
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Navigating multiple logics: Legitimacy and the quest for societal impact in science

2022

Academic scientists are encouraged to pursue research that delivers both scientific and societal impact. This may involve a search for alternative mechanisms of social approval which lead to endorsement of scientists’ research goals. We explore how scientists mobilise and accumulate different forms of legitimacy, which might favour their participation in practices related to innovation and societal impact. We propose three specific sources of scientific legitimacy: i) scientists’ social networks (research-related legitimacy ties), ii) prominence in the relevant academic community (reputation-based legitimacy); and direct contact with the primary beneficiaries of the research (beneficiary-ba…

Social approvalbusiness.industrymedia_common.quotation_subjectGeneral EngineeringlegitimacyBeneficiarySocietal impact of nanotechnologyinstitutional logicssocietal impactPublic relationsresearch-related legitimacy tiesLarge sampleinnovation involvementManagement of Technology and InnovationPolitical scienceUNESCO::SOCIOLOGÍAAcademic communityreputation-based legitimacybeneficiary-based legitimacybusinessLegitimacyscience logicReputationmedia_commonTechnovation
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Environmentalism and Political Participation: Toward a New System of Social Beliefs and Values?

1992

This study examines the social beliefs and values of the Spanish population with regard to environmentalism. A questionnaire on environmental beliefs was produced and administered to two sample groups. The first group, to be called “activists” (comprising 86 subjects), is characterized by belonging to one or other environmental organization. The other, termed “nonactivists” (comprising 410 subjects), is composed of people not belonging to any environmentalist organization. We conclude that, as in other Western countries, environmentalism has moved from being a set of beliefs held by a small group of people to becoming a central element in the system of beliefs characterizing our society. In…

Social groupSpanish populationPoliticsSocial Psychologymedia_common.quotation_subjectEnvironmentalismIdeologySociologyTwo sampleSet (psychology)Social psychologyCentral elementmedia_commonJournal of Applied Social Psychology
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