scholarly journals Spatiotemporal Mobility Based Trajectory Privacy-Preserving Algorithm in Location-Based Services

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2021
Author(s):  
Zhiping Xu ◽  
Jing Zhang ◽  
Pei-wei Tsai ◽  
Liwei Lin ◽  
Chao Zhuo
Keyword(s):  
Simulated Annealing Algorithm ◽  
Daily Life ◽  
Privacy Preserving ◽  
Location Based Services ◽  
Quality Of Services ◽  
High Quality ◽  
Location Data ◽  
Annealing Algorithm ◽  
The Relationship

Recent years have seen the wide application of Location-Based Services (LBSs) in our daily life. Although users can enjoy many conveniences from the LBSs, they may lose their trajectory privacy when their location data are collected. Therefore, it is urgent to protect the user’s trajectory privacy while providing high quality services. Trajectory k-anonymity is one of the most important technologies to protect the user’s trajectory privacy. However, the user’s attributes are rarely considered when constructing the k-anonymity set. It results in that the user’s trajectories are especially vulnerable. To solve the problem, in this paper, a Spatiotemporal Mobility (SM) measurement is defined for calculating the relationship between the user’s attributes and the anonymity set. Furthermore, a trajectory graph is designed to model the relationship between trajectories. Based on the user’s attributes and the trajectory graph, the SM based trajectory privacy-preserving algorithm (MTPPA) is proposed. The optimal k-anonymity set is obtained by the simulated annealing algorithm. The experimental results show that the privacy disclosure probability of the anonymity set obtained by MTPPA is about 40% lower than those obtained by the existing algorithms while the same quality of services can be provided.

THE IMPLEMENTATION OF ISO 9001:2015 TO IMPROVE QUALITY OF SERVICE AT PUSAT KESIHATAN UNIVERSITI (PKU), UNIVERSITI UTARA MALAYSIA(UUM)

2018 ◽  
Vol 13 (Number 2) ◽  
pp. 67-77
Author(s):  
Anis Syamimi Abd Rahim ◽  
Mohd Norhasni Mohd Asaad
Keyword(s):  
Quality Of Service ◽  
Customer Satisfaction ◽  
Descriptive Statistics ◽  
Iso 9001 ◽  
Quality Of Services ◽  
Research Questions ◽  
Spss Software ◽  
The Relationship ◽  
Universiti Utara Malaysia

The purpose of this study is to review the implementation of ISO 9001:2015 in order to improve the quality of services at Pusat Kesihatan Universiti (PKU), Universiti Utara Malaysia. The respondents of this study were customers at the PKU, UUM. The questionnaire was distributed to 50 respondents. The data were analyzed using SPSS software version 24. The data were tested using descriptive statistics, and correlation analysis to answer the research questions and to achieve the objectives. The findings show that customers agree that implementation of ISO 9001:2015 give service at PKU, UUM is good and satisfied. Through the correlation test, the results showed that the relationship between the implementation of ISO 9001:2015 has a positive and significant impact on customer satisfaction and the effect of implementing ISO 9001:2015 has a positive and significant impact in improving quality of service at PKU, UUM.Through mean and standard deviation tests, results show that tangible dimensions are the main dimensions of customer satisfaction while dimensions with low values are dimensions of responsiveness.Therefore, all aspects of service in PKU, UUM will be strengthened and all aspects of the weaknesses could be addressed to improve the service in order to maintain good quality services.

scholarly journals Simulated Annealing with Previous Solutions Applied to DNA Sequence Alignment

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Ernesto Liñán-García ◽  
Lorena Marcela Gallegos-Araiza
Keyword(s):  
Simulated Annealing ◽  
Sequence Alignment ◽  
Simulated Annealing Algorithm ◽  
Multiple Sequence ◽  
Heating And Cooling ◽  
Dna Sequence Alignment ◽  
Alignment Problem ◽  
Simple Change ◽  
Annealing Algorithm

A new algorithm for solving sequence alignment problem is proposed, which is named SAPS (Simulated Annealing with Previous Solutions). This algorithm is based on the classical Simulated Annealing (SA). SAPS is implemented in order to obtain results of pair and multiple sequence alignment. SA is a simulation of heating and cooling of a metal to solve an optimization problem. In order to select randomly a current solution, SAPS algorithm chooses a solution from solutions that have been previously generated within the Metropolis Cycle. This simple change has led to increase the quality of the solution to the problem of aligning genomic sequences with respect to the classical Simulated Annealing algorithm. The parameters of SAPS, for certain instances, are tuned by an analytical method, and some parameters have experimentally been tuned. SAPS has generated high-quality results in comparison with the classical SA. The instances used are specific genes of the AIDS virus.

Interaction of Physiology Character - Secondary Metabolic of Fusarium oxysporum on Tomatoes of Fusarium Wilt Symptom

2019 ◽  
Vol 967 ◽  
pp. 95-100
Author(s):  
Abdul Azis Ambar ◽  
Henny Setyawati ◽  
Nur Ilmi
Keyword(s):  
High Performance Liquid Chromatography ◽  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
High Performance ◽  
Secondary Compounds ◽  
High Quality ◽  
Code Analysis ◽  
Wilt Symptom ◽  
The Relationship

Fusarium oxysporum (F. oxysporum) is the pathogen that caused fusarium wilt diseases on the tomatoes. The rise of the symptom was caused by secondary metabolic produced by F. oxysporum. The associated with the level of secondary metabolic pathogenesis that cause symptoms of wilt on tomatoes, but secondary metabolic excreted by F. oxysporum was not necessarily wilt in a plant. The phenomenon caused F. oxysporum producing secondary metabolic in the different concentration, either its quantity or quality. The nature of physiology being tested, observed by growing 4 isolates using a medium PDA on the temperature of 10, 15, 20, 25, 30, and 35 °C. The content of secondary metabolic measured on the four isolates using the Notz et al., (2002) and analyzed by using High-Performance Liquid Chromatography (HPLC). The results of the analysis of the nature of the physiological (colour colonies) were that every isolate planted for 8 days shows the variation of white, white redness, white yellowness until purpleness. Based on Methuen Handbook of Colour (Kornerup & Wanscher, 1978), generally isolates tested shows a bright colour, signaled with A letter at every code. Analysis HPLC on the results of secondary metabolic, either quantity or quality, sequentially were: isolates BAR (3; 1,997 ppm); ENR (3; 5,105 ppm); SID (4; 2,135 ppm) and MAL (5; 2,065 rpm). If it was seen by the relationship between the colour of colonies with the production of the secondary metabolic compound, it seemed that the older or darker colonies’ colour the more secondary compounds formed, but dark or old colonies’ colour does not determine a high quality of acid fusaric produced. Keywords: Colonies colour, F. oxysporum, secondary metabolic .

A Meta-Analysis on the Relationship Between Prayer and Student Outcomes

2020 ◽  
Vol 52 (8) ◽  
pp. 1223-1237 ◽  
Author(s):  
William Jeynes
Keyword(s):  
Socioeconomic Status ◽  
Urban Schools ◽  
Student Outcomes ◽  
Meta Analysis ◽  
Behavioral Outcomes ◽  
High Quality ◽  
Race And Gender ◽  
And Gender ◽  
The Relationship

A meta-analysis, including 13 studies, was undertaken on the relationship between the exercise of student prayer and academic and behavioral outcomes in urban schools. Analyses both with and without sophisticated controls (e.g., socioeconomic status, race, and gender) were used. Additional analyses were done to determine whether the effects of prayer differed by the quality of the study. The results indicated that the exercise of prayer is associated with better levels of student outcomes. Moreover, the effects of prayer were greater for high-quality studies. The significance of these results is discussed.

scholarly journals Calibrating the Micromechanical Parameters of the PFC2D(3D) Models Using the Improved Simulated Annealing Algorithm

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Min Wang ◽  
Ping Cao
Keyword(s):  
Numerical Simulation ◽  
Simulated Annealing ◽  
3D Model ◽  
Simulated Annealing Algorithm ◽  
3D Models ◽  
Calibration Process ◽  
Bond Model ◽  
Physical Experiments ◽  
Annealing Algorithm ◽  
The Relationship

PFC2D(3D) is commercial software, which is commonly used to model the crack initiation of rock and rock-like materials. For the PFC2D(3D) numerical simulation, a proper set of microparameters need to be determined before the numerical simulation. To obtain a proper set of microparameters for PFC2D(3D) model based on the macroparameters obtained from physical experiments, a novel technique has been carried out in this paper. The improved simulated annealing algorithm was employed to calibrate the microparameters of the numerical simulation model of PFC2D(3D). A Python script completely controls the calibration process, which can terminate automatically based on a termination criterion. The microparameter calibration process is not based on establishing the relationship between microparameters and macroparameters; instead, the microparameters are calibrated according to the improved simulated annealing algorithm. By using the proposed approach, the microparameters of both the contact-bond model and parallel-bond model in PFC2D(3D) can be determined. To verify the validity of calibrating the microparameters of PFC2D(3D) via the improved simulated annealing algorithm, some examples were selected from the literature. The corresponding numerical simulations were performed, and the numerical simulation results indicated that the proposed method is reliable for calibrating the microparameters of PFC2D(3D) model.

Seeking feedback but unable to improve work performance? Qualified feedback from trusted supervisors matters

2015 ◽  
Vol 20 (1) ◽  
pp. 81-100 ◽  
Author(s):  
Eun Young Nae ◽  
Hyoung Koo Moon ◽  
Byoung Kwon Choi
Keyword(s):  
Boundary Conditions ◽  
Work Performance ◽  
Positive Influence ◽  
High Quality ◽  
Content Type ◽  
Moderating Factors ◽  
Feedback Quality ◽  
Seeking Behavior ◽  
The Relationship

Purpose – The purpose of this paper is to investigate the boundary conditions in the relationship between feedback-seeking behavior (FSB) and work performance. The authors hypothesized that the positive influence of employees’ FSB on their work performance is influenced by perceived quality of feedback. The authors also expected that employees’ trust in their supervisors moderated the interaction between their FSB and perceived feedback quality. Design/methodology/approach – Data were collected from 202 employees in South Korea. A hierarchical multiple regression analysis was performed to test the hypothesis. Findings – The results showed that while employees’ FSB was positively related to work performance, the influence was stronger for employees who perceived they were receiving high quality of feedback from supervisors. The authors also found that the moderating effect of feedback quality on the relationship between FSB and work performance was stronger when employees had high levels of trust in their supervisors. Practical implications – The findings suggest that if managers wish to encourage employees to achieve work goal and desirable performance levels by actively engaging in FSB, they should pay more attention to providing high quality of feedback and building trust with employees. Originality/value – This study contributes to expand the understanding of FSB-work performance relationship by verifying the boundary conditions, which suggests the importance of examining the moderating factors in the FSB mechanism.

scholarly journals Advancing Our Understanding of Narrative Comments Generated by Direct Observation Tools: Lessons From the Psychopharmacotherapy-Structured Clinical Observation

2019 ◽  
Vol 11 (5) ◽  
pp. 570-579 ◽  
Author(s):  
John Q. Young ◽  
Rebekah Sugarman ◽  
Eric Holmboe ◽  
Patricia S. O'Sullivan
Keyword(s):  
Direct Observation ◽  
Clinical Observation ◽  
High Quality ◽  
Written Comments ◽  
Checklist Score ◽  
Observation Tools ◽  
Assess Quality ◽  
The Relationship ◽  
Narrative Comments

ABSTRACT Background While prior research has focused on the validity of quantitative ratings generated by direct observation tools, much less is known about the written comments. Objective This study examines the quality of written comments and their relationship with checklist scores generated by a direct observation tool, the Psychopharmacotherapy-Structured Clinical Observation (P-SCO). Methods From 2008 to 2012, faculty in a postgraduate year 3 psychiatry outpatient clinic completed 601 P-SCOs. Twenty-five percent were randomly selected from each year; the sample included 8 faculty and 57 residents. To assess quality, comments were coded for valence (reinforcing or corrective), behavioral specificity, and content. To assess the relationship between comments and scores, the authors calculated the correlation between comment and checklist score valence and examined the degree to which comments and checklist scores addressed the same content. Results Ninety-one percent of the comments were behaviorally specific. Sixty percent were reinforcing, and 40% were corrective. Eight themes were identified, including 2 constructs not adequately represented by the checklist. Comment and checklist score valence was moderately correlated (Spearman's rho = 0.57, P < .001). Sixty-seven percent of high and low checklist scores were associated with a comment of the same valence and content. Only 50% of overall comments were associated with a checklist score of the same valence and content. Conclusions A direct observation tool such as the P-SCO can generate high-quality written comments. Narrative comments both explain checklist scores and convey unique content. Thematic coding of comments can improve the content validity of a checklist.

Parolee–Parole Officer Rapport: Does It Impact Recidivism?

2017 ◽  
Vol 62 (11) ◽  
pp. 3581-3602 ◽  
Author(s):  
Alyssa W. Chamberlain ◽  
Matthew Gricius ◽  
Danielle M. Wallace ◽  
Diana Borjas ◽  
Vincent M. Ware
Keyword(s):  
Positive Relationship ◽  
Negative Relationship ◽  
Violent Offender ◽  
Parole Officer ◽  
Officer Training ◽  
High Quality ◽  
Parole Officers ◽  
It Impact ◽  
The Relationship

Parole officers are an integral part of parolees’ reentry process and success. Few studies, however, have examined whether the quality of the relationship between parolees and their parole officer influences outcomes such as recidivism. This study assesses how recidivism is affected by the quality of the relationship that parolees have with their parole officers. Using the Serious and Violent Offender Reentry Initiative (SVORI) dataset, we use parolees’ perceptions of their relationship with their parole officer to determine whether they have established a positive or negative relationship, and whether these types of relationships differentially affect recidivism. Results show that parolees who have a negative relationship with their parole officer have higher rates of recidivism, while a positive relationship lowers parolees’ likelihood of recidivating. An implication of this study emphasizes parole officer training that develops positive, high-quality relationships with parolees. Further implications are discussed below.

scholarly journals Hierarchical framework for coordinate optimization of train timetable and electric motor train unit circulation plan

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401770579
Author(s):  
Chao Lu ◽  
Leishan Zhou ◽  
Jinjin Tang ◽  
Ran Chen
Keyword(s):  
Electric Motor ◽  
Simulated Annealing Algorithm ◽  
Optimal Solution ◽  
Computation Time ◽  
Tree Construction ◽  
Total Travel Time ◽  
Annealing Algorithm ◽  
Increasing Demand ◽  
Main Model

To meet the increasing demand for improving railway service quality while using the precious mobile resources reasonably and economically, this research proposes a hierarchical approach that integrates the model for constructing an efficient electric motor train unit circulation plan into the model for optimized timetable design without predefining timetable details. A simulated annealing algorithm for solving the timetabling (main) model is designed, in which the neighborhood system is pretreated. A special tree construction–based branch-and-bound algorithm is improved for solving the electric motor train unit circulation planning (sub)model. The results of the numerical experiment verify the effectiveness of the proposed method. Specifically, compared to the randomly generated initial solution, the optimal solution obtained by the proposed methods reduces the total travel time by 686 min and reduces the number of electric motor train units by 5. The number of electric motor train units needed by the proposed method is on average at least two less than the method that handles the problem in a sequential way. Railway operators can implement this approach for balancing the efficiency of timetable and the quality of electric motor train unit circulation plan within a reasonable computation time when scheduling trains in railways.

scholarly journals FORMATION OF COMPETITIVE ADVANTAGES OF RESTAURANT BUSINESS IN UKRAINE UNDER THE CONDITIONS OF EUROPEAN INTEGRATION

2021 ◽  
pp. 181-196
Author(s):  
Yuliia STAVSKA ◽  
Liudmyla YAKHNO
Keyword(s):  
European Integration ◽  
Service Sector ◽  
Restaurant Industry ◽  
Quality Of Services ◽  
Competitive Advantages ◽  
Economic Stability ◽  
Negative Factors ◽  
The Relationship ◽  
Intensive Development

The article examines the process of intensive development and globalisation of the restaurant business in Ukraine as a part of the service sector of the economy exposed to many factors different in strength, duration and areas of influence in the context of European integration. The article is devoted to the consideration of positive and negative factors influencing the development of hospitality. Among them are extensive and intensive. The development of hotel-restaurant business, its impact on the quality of life of citizens of Ukraine is considered. Particular attention has been paid to the changes and approaches which took place in the work of restaurants in pandemic and quarantine restrictions. The analysis of development of restaurant economy of Ukraine in 2003-2020 was carried out. There was a significant reduction in restaurants during 2014 - 2020. The direct dependence of the state of the restaurant industry of Ukraine on the development of its economy has been substantiated. It has been proved that the enterprises of the hospitality industry are gaining popularity, intensive development in conditions of political and economic stability, stable economic situation of visitors to restaurants, as well as preserved cultural heritage. Thus development of restaurant business is carried out in the conditions of European integration under the approved programmes. There is an introduction of new forms and methods of service. The analysis shows the relationship between the development of the restaurant business and integration processes. As a result of the study, an algorithm for assessing the level of competitiveness of restaurants was developed. The key criteria for the competitiveness of the restaurants have been established, namely: the level of customer satisfaction, quality of services provided, efficiency of management and organization processes in the restaurants, the level of corporate and social responsibility, competitive strategy of the restaurant and the competitive environment.

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