Ingenieria y Universidad最新文献_第5页

Privacy perception in location-based services for mobile devices in the university community of the north coast of Colombia 哥伦比亚北部海岸大学社区移动设备基于位置的服务中的隐私感知

Ingenieria y Universidad Pub Date : 2019-02-21 DOI: 10.11144/JAVERIANA.IYU23-1.PPLB

Margarita Gamarra, Inés Meriño Fuentes, Juan Calabria Sarmiento, Omar Gutierrez Acosta, Mauricio Barrios Barrios, Nallig Leal, Pedro Mario Wightman Rojas

{"title":"Privacy perception in location-based services for mobile devices in the university community of the north coast of Colombia","authors":"Margarita Gamarra, Inés Meriño Fuentes, Juan Calabria Sarmiento, Omar Gutierrez Acosta, Mauricio Barrios Barrios, Nallig Leal, Pedro Mario Wightman Rojas","doi":"10.11144/JAVERIANA.IYU23-1.PPLB","DOIUrl":"https://doi.org/10.11144/JAVERIANA.IYU23-1.PPLB","url":null,"abstract":"Introduction: The use of mobile applications has increased in the last years. Most of them require the knowledge of the user location, either for their core service or for marketing purposes. Location-based services (LBS) offer context-based assistance to users based on their location. Although these applications ask the user for permission to use their location and even explain in detail how this information will be used in its terms and conditions, most users are not aware or even interested in the fact that their location information is stored in databases and monetized by selling it to third-party companies. Regarding this situation, we developed a study with the aim to assess perception, concerns and awareness from users about their location information. Methods: This work is based on an exploratory survey applied to the university community, mainly from the North Coast of Colombia, to measure the perception of location privacy of users with mobile devices. The questionnaire was applied using Google Forms. The survey has nineteen questions organized in three sections: personal information, identification of privacy and privacy management. These questions were designed to know the users’ perceptions of privacy concerns in LBS and any actions they take to preserve it. Results: The results show that, in general, the respondents do not have a real concern regarding the privacy of their geolocation data, and the majority is not willing to pay to protect their privacy. Conclusions: This type of surveys can generate awareness among participants about the use of their private information. The results expose in this paper can be used to create government policies and regulations by technology companies about the privacy management.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83452798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

GALILEO: A Georeferenced System proposed for Emergency Services’ Population Control 伽利略:为紧急服务人口控制提出的地理参考系统

Ingenieria y Universidad Pub Date : 2019-02-19 DOI: 10.11144/javeriana.iyu23-1.ggsp

Andrés Felipe Cruz-Rodríguez, Sebastián Ospina-Gómez, P. Feijóo-García

{"title":"GALILEO: A Georeferenced System proposed for Emergency Services’ Population Control","authors":"Andrés Felipe Cruz-Rodríguez, Sebastián Ospina-Gómez, P. Feijóo-García","doi":"10.11144/javeriana.iyu23-1.ggsp","DOIUrl":"https://doi.org/10.11144/javeriana.iyu23-1.ggsp","url":null,"abstract":"Introduction: Overpopulation in emergency services is a problem that can be observed worldwide, and although it has been addressed from different disciplines and perspectives, it still afflicts citizens who are subject to long waiting lists before being attended. Objective: The work here describes the design, development and the first validation of a Web and Mobile georeferenced crowd system for the city of Bogotá, Colombia, oriented to inform and empower the citizen on the population status of the emergency services found in the city. Materials and Method: In this document, we present the architecture, design, and features of the GALILEO System, with results regarding the first validation with citizens of Bogotá, to capture the acceptance and perceived impact of this type of solution in the context in which the System is proposed to function. Results and Discussion: Although GALILEO has not yet been massively implemented in the context for which it is proposed, the results presented here allow us to explore how Information and Communication Technologies (ICT) can be proposed to solve complex social problems, particularly considering the role of the citizen as a source and receiver of information.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"389 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80802343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A 0.58 mm2 CMOS reconfigurable sigma delta ADC for mobile WiMAX receiver 用于移动WiMAX接收机的0.58 mm2 CMOS可重构σ δ ADC

Ingenieria y Universidad Pub Date : 2019-02-19 DOI: 10.11144/javeriana.iyu23-1.crsd

J. Mallek, H. Daoud, R. Aloulou, H. Mnif, M. Loulou

{"title":"A 0.58 mm2 CMOS reconfigurable sigma delta ADC for mobile WiMAX receiver","authors":"J. Mallek, H. Daoud, R. Aloulou, H. Mnif, M. Loulou","doi":"10.11144/javeriana.iyu23-1.crsd","DOIUrl":"https://doi.org/10.11144/javeriana.iyu23-1.crsd","url":null,"abstract":"Objective: In this work the design of a fourth-order Reconfigurable Sigma Delta analog-to-digital converter (ΣΔ ADC) for 5MHz, 7MHz or 10MHz channel bandwidths are presented. Materials and methods: Our design technique aims to keep the same ADC architecture in response to multi-band and multi-mode aspects of Mobile WiMAX standard. To this end, we set each sampling frequency corresponding to each channel bandwidth, in order that the same OSR value would be kept for the different channel bandwidths. This technique is intended to optimize the power and area of the ADC that efficiently covers varying channel bandwidths. Moreover, we use the pole placement method to calculate the optimized filter coefficients of Continuous-Time Sigma-Delta (CT ΣΔ) ADC. Results and discussion: Over 5MHz, 7MHz and 10MHz channel bandwidths, the ADC achieved 72.89dB, 67.26dB and 66.47dB peak SNR values, respectively and a dynamic range of 73.5dB, 69.47dB and 66.5dB respectively with only 28mW, 28.2mW and 28.6mW power consumption respectively. Conclusions: The design of the proposed reconfigurable ADC intended for use in the mobile WiMAX standard were achieved. Moreover, the results obtained are satisfactory and are in accordance with theoretical expectations.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82397933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Including uncertainties in multi-criteria decision-making: a superfluous task or a requirement? 在多标准决策中包括不确定性:一个多余的任务还是一个需求?

Ingenieria y Universidad Pub Date : 2019-02-19 DOI: 10.11144/JAVERIANA.IYU23-1.IUMD

S. Galarza-Molina, A. Torres

引用次数: 0

Operational supply chain risk identification and prioritization from SCOR model 运营供应链风险识别和SCOR模型的优先级排序

Ingenieria y Universidad Pub Date : 2019-02-18 DOI: 10.11144/JAVERIANA.IYU23-1.OSCR

Jenifer Ramos Ríos, D. F. Manotas Duque, Juan Carlos Osorio Gómez

{"title":"Operational supply chain risk identification and prioritization from SCOR model","authors":"Jenifer Ramos Ríos, D. F. Manotas Duque, Juan Carlos Osorio Gómez","doi":"10.11144/JAVERIANA.IYU23-1.OSCR","DOIUrl":"https://doi.org/10.11144/JAVERIANA.IYU23-1.OSCR","url":null,"abstract":"Objective: This study aims to propose a methodology that identifies and prioritizes the operational risk factors in a supply chain (SC) to provide a tool according to the process-based SC approach that is useful for risk assessment throughout the SC. Materials and methods: Risk identification was conducted by a scenario analysis, which linked the risk factors with the standard key performance indicators (KPIs) of the processes and logistics activities proposed by the supply chain operational reference model (SCORM o SCOR). These influence relationships were quantified using a proposed scale, and then, the risk factors were prioritized by the definition of their influence levels. This approach was applied to a real SC. Results and discussion: Twenty risk factors were clearly and effectively identified, analyzed and prioritized, and priority was given to those with the highest influence level, which can be understood as the risk factors that have a larger capacity to negatively affect SC performance. Conclusions: The methodology allows the identification of the most influential risk factors in a SC, and as it is based on a standard model, it fosters a collaborative analysis among its echelons. The main contributions of this paper are the risk identification by means of the KPIs of the SCOR model and the measurement of their influence levels, which is a new and useful feature for risk prioritization.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79269148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Niobium carbide coatings produced on tool steels via thermo-reactive diffusion 通过热反应扩散在工具钢上制备碳化铌涂层

Ingenieria y Universidad Pub Date : 2018-08-09 DOI: 10.11144/javeriana.iyu22-2.nccp

Fredy Alejandro Orjuela Guerrero, John Jairo Olaya Florez, José Edgar Alfonso Orjuela

{"title":"Niobium carbide coatings produced on tool steels via thermo-reactive diffusion","authors":"Fredy Alejandro Orjuela Guerrero, John Jairo Olaya Florez, José Edgar Alfonso Orjuela","doi":"10.11144/javeriana.iyu22-2.nccp","DOIUrl":"https://doi.org/10.11144/javeriana.iyu22-2.nccp","url":null,"abstract":"Objective: In this work, niobium carbide (NbC) coatings were deposited on substrates of the tool steels AISI H13 and AISI D2 using thermo-reactive deposition/diffusion (TRD) in order to analyze their behavior against corrosion in a saline environment. Materials and methods: The niobium carbides were obtained using salt baths composed of borax pentahydrate, aluminum and ferroniobium. This mixture was heated at 1050 °C for 4 hours. The chemical composition was determined by X-ray fluorescence (XRF). The coatings were morphologically characterized using scanning electron microscopy (SEM), the crystal structure was analyzed using X-ray diffraction (XRD), and the electrochemical behavior was studied using potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). Results and discussion: The XRF analysis indicated that the coatings contained 87.476 wt% Nb and 51.943 wt% Nb for the D2-substrate and the H13-substrate, respectively. The SEM images revealed that the morphology of the surface of the coatings was homogeneous. The XRD analysis established that the coatings were polycrystalline, and the electrochemical tests established that the corrosion resistance increased slightly in the covered substrates with respect to the uncoated steels, with the best results being obtained in the layers of niobium carbide deposited on AISI D2 steel. Conclusions: The analysis of corrosion resistance revealed that the coatings prepared on D2 steel have a higher corrosion resistance because they have fewer surface imperfections, which causes the coating to exhibit a dielectric behavior.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81441842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Technical evaluation for the proposal of a different cricondentherm limit for the Caribbean coast within Colombian gas quality regulations 在哥伦比亚天然气质量条例范围内对加勒比海岸的不同临界温度限制建议进行技术评价

Ingenieria y Universidad Pub Date : 2018-08-09 DOI: 10.11144/javeriana.iyu22-2.pacg

Ingrid Navarro Ochoa, Manuel Alfredo Figueredo Medina

{"title":"Technical evaluation for the proposal of a different cricondentherm limit for the Caribbean coast within Colombian gas quality regulations","authors":"Ingrid Navarro Ochoa, Manuel Alfredo Figueredo Medina","doi":"10.11144/javeriana.iyu22-2.pacg","DOIUrl":"https://doi.org/10.11144/javeriana.iyu22-2.pacg","url":null,"abstract":"Introduction: The cricondentherm is the highest temperature above which a liquid cannot be formed, regardless of the pressure. According to the Colombian natural gas transmission regulations, this temperature should not exceed 7.2°C. Although this restriction is currently applied over the whole country, it is possible to propose a different limit on the cricondentherm for the Colombian Caribbean coast. Methods: In this document, the current hydrocarbon dew point (HCDP) limits for gas transport pipelines in several countries worldwide are analyzed, the weather conditions on the Colombian Caribbean coast are reviewed, and a thermodynamic and hydraulic study is developed, taking into account the composition of the gas (before any treatment) from three fields on the Caribbean coast, the elevation profile of one of the gas pipelines on the Caribbean coast, and the influence of the weather conditions on the behavior of gas in the pipeline. Results: Some countries define their HCDP values depending on the region through which the gas is transported. Simulations of the chosen gas pipeline with lean gases without any treatment at the worst ambient conditions of the Colombian Caribbean coast show that there is a slight liquid condensation at 21°C, indicating a gap with the current regulations (7.2°C) in which an additional maximum cricondentherm can be proposed for the Colombian Caribbean coast. Conclusions: From this work, it is concluded that a new cricondentherm for warm climates in Colombia, within the transmission regulations, should be between 10 and 12.6°C. This proposal is based on the results obtained in simulations and the acknowledgment that some of the Colombian gas pipelines operate only in warm regions of the country.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76683611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Framework to elicit multidimensional requirements 框架来引出多维需求

Ingenieria y Universidad Pub Date : 2018-08-09 DOI: 10.11144/javeriana.iyu22-2.femr

E. Serna M., Alexei Serna A.

引用次数: 0

Surface treatments of ti-alloy based bone implant manufactured by electrical discharge machining 电火花加工钛合金基骨种植体的表面处理

Ingenieria y Universidad Pub Date : 2018-08-09 DOI: 10.11144/JAVERIANA.IYU22-2.STTB

N. Qosim, S. Supriadi, A. S. Saragih, Y. Whulanza

{"title":"Surface treatments of ti-alloy based bone implant manufactured by electrical discharge machining","authors":"N. Qosim, S. Supriadi, A. S. Saragih, Y. Whulanza","doi":"10.11144/JAVERIANA.IYU22-2.STTB","DOIUrl":"https://doi.org/10.11144/JAVERIANA.IYU22-2.STTB","url":null,"abstract":"Objective: This research aims to observe the extent to which several surface treatment techniques increase the surface roughness of titanium alloy implants which was manufactured via electrical discharge machining (EDM). The effects of these techniques were also observed to decrease the Cu content on the implant surface. Materials and Methods: In this research, ultrasonic cleaning, rotary tumbler polishing, and brushing were employed as techniques to increase the roughness of a titanium implant which was manufactured via EDM, to the moderately rough category, and to reduce the contaminant element deposited on its surface. An MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay test was also used to observe the effect of these engineered specimens with respect to mesenchymal stem cells’ proliferation. Results and Discussion: The results show that ultrasonic cleaning and rotary tumbler polishing created a significant increase (90% and 67%, respectively) in the surface roughness. On the other hand, brushing was shown to be the best benchmark for reducing the contamination of Copper (Cu). Furthermore, rotary tumbler polishing and brushing can increase the percentage of living cells compared to the original surface EDM specimens. Conclusion: All micro-finishing methods that were employed are able to increase the surface roughness of Ti alloy based-implant to moderately rough category.","PeriodicalId":39036,"journal":{"name":"Ingenieria y Universidad","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79163536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Modeling and simulation of customer dissatisfaction, worker unpunctuality and tolerance to delay in make-to-order supply chains measured through customer lifetime value performance 通过客户终身价值绩效衡量的定制供应链中客户不满、工人不守时和延迟容忍的建模和仿真

Ingenieria y Universidad Pub Date : 2018-08-09 DOI: 10.11144/JAVERIANA.IYU22-2.MSCD

J. A. Alvarado Valencia, Daniel Silva

引用次数: 0