Pervasive and ubiquitous environments must handle the detection and management of users, devices and services, while guaranteeing the privacy of both the users and the environment itself. Current techniques for handli...
详细信息
Pervasive and ubiquitous environments must handle the detection and management of users, devices and services, while guaranteeing the privacy of both the users and the environment itself. Current techniques for handling privacy found in the literature treating the subject in various ways, while concentrating on the device management, communication protocols, user profiles and environmental access. This paper examines a control model for privacy in pervasive environments from the perspective of the environment. A prototype was devised and tested to validate the generic model of privacy which was also used to compare taxonomic concepts in the literature. Moreover, the prototype was devised and tested to validate the generic model of privacy for control and manage various users, devices and environments and so on. The prototype was based on Percontrol (a system for pervasive user management), which was only intended to identify users using Wi-Fi, and now it is capable of managing temperature, luminosity and other preferences, measured by a WSN (wireless sensor network) embedded to Percontrol, and the data treatment is done by an ANN (artificial neural network). Results confirmed the viability of device detection with Wi-Fi, Bluetooth and RFID (radio frequency identification) for an increases slight of the latency in registering new devices on the system.
The solar desalinator is a low cost installation and operation equipment that can contribute to tackling the problem of water shortages in the *** of the importance of this equipment,the present work has the objective...
详细信息
The solar desalinator is a low cost installation and operation equipment that can contribute to tackling the problem of water shortages in the *** of the importance of this equipment,the present work has the objective to quantify the relation of the temperature of the water with the production of the *** this,a compact desalinator with glass cover in square pyramidal form and a heating system controlled by a logic programmer was *** a result,it was verified the efficiency of the logic controller as an auxiliary tool for experimental work and the relationship between temperature ranges and desalination production.
BACKGROUND Percutaneous endoscopic gastrostomy(PEG)and percutaneous radiological gastrostomy(PRG)are minimally invasive techniques commonly used for prolonged enteral *** safe,both techniques may lead to complications...
详细信息
BACKGROUND Percutaneous endoscopic gastrostomy(PEG)and percutaneous radiological gastrostomy(PRG)are minimally invasive techniques commonly used for prolonged enteral *** safe,both techniques may lead to complications,such as bleeding,infection,pain,peritonitis,and tube-related *** literature is unclear on which technique is the *** To establish which approach has the lowest complication *** A database search was performed from inception through November 2022,and comparative studies of PEG and PRG were selected following the Preferred Reporting Items for Systematic Reviews and Meta-analyses *** included studies compared the two techniques directly and provided absolute values of the number of *** with pediatric populations were *** primary outcome of this study was infection and ***,peritonitis,pain,and mechanical complications were secondary *** risk of bias was assessed using the Cochrane risk-of-bias tool for randomized trials(RoB2)and we used The Risk of Bias in Nonrandomized Studies(ROBINS-I)to analyze the retrospective *** also performed GRADE analysis to assess the quality of *** on risk differences and 95%confidence intervals were obtained using the Mantel-Haenszel *** Seventeen studies were included,including two randomized controlled trials and fifteen retrospective cohort *** total population was 465218 individuals,with 273493 having undergone PEG and 191725 *** only outcome that showed a significant difference was tube related complications in retrospective studies favoring PEG(95%CI:0.03 to 0.08;P<0.00001),although this outcome did not show significant difference in randomized studies(95%CI:-0.07 to 0.04;P=0.13).There was no difference in the analyses of the following outcomes:infection in retrospective(95%CI:-0.01 to 0.00;P<0.00001)or randomized(95%CI:-0.06 to 0.04;P=0.44)studies;bleeding in retrospective(95%CI
暂无评论