Designing and Simulation for Vertical Moving Control of UAV System using PID, LQR and Fuzzy logic

This paper presents the designing and simulation for vertical moving controlof Unmanned Air Vehicles (UAV) system using Proportional IntegralDerivative (PID) control method, Linear Quadratic Regulator (LQR) controlmethod and fuzzy logic control technique.The UAV system pose a challengercontrol problem that in it precise model of system is non-linear. Theconventional PID controller, the LQR controller, Fuzzy Logic Controller(FLC) and Self-Tuning Fuzzy PID controller are designned based on thedynamic modeling of the system is derived from a suitable mathematicalmodel to describe the vertical motion of a UAV. Simulation results in Matlaband Simulink show that by using self-tuning Fuzzy PID, the performance ofvertical moving control system is improved significantly compared to Othercontrollers.DOI:http://dx.doi.org/10.11591/ijece.v3i5.344

Identification and Assessment of Cyber Security and Privacy Challenges in the Transition of Tehran Metropolis to Smart City under Uncertainty

The growing trend of the world towards new technologies and the formation of smart cities, despite their capabilities and benefits, has raised serious concerns about cybersecurity threats and citizens' privacy challenges. Tehran is no exception to this rule in the transition to a smart city. The present paper, in a descriptive survey study, aims to provide a framework for managing cybersecurity and privacy challenges in the transition of Tehran to a smart city. In this research, these challenges are identified by in-depth library studies as well as the implementation of fuzzy Delphi method among a sample of organizational experts (including ten senior managers and relevant officials of the Ministry of Communication and Information Technology, Tehran Municipality Information and Communication Technology Organization, and cyber police). Moreover, the degree of importance (weight) of each challenge is determined by the Fuzzy Best-Worst method (FBWM). The findings of this study indicated the high capability of the proposed framework in identifying and accurately weighting these challenges under uncertainty

Evaluation of osteogenic potential of demineralized bone matrix in pigeon (Columba livia Gmelin)

Bone fractures are among the most frequent tragedies crippling a large number of birds every year. Unfortunately, many of these birds will not be able to get back to the wild or have to be euthanized due to a wide range of complications. Despite the dearth of cancellous bone in avian species, there are currently no reliable alternatives to autologous bone grafting techniques available. Thus this study was undertaken to evaluate implants of demineralized bone matrix (DBM) in a pigeon model. In order to do so, DBM was evaluated in both heterotopic and orthotopic sites.In heterotopic study, two forms of allogenic DBM comprised of tubular DBM (TDBM) and chipped DBM (CDBM) were implanted bilaterally into the superficial pectoral muscles in 24 pigeons (Columba livia). Autologous bone marrow which is known to produce ectopic bone in mammals was implanted in a third site. A fourth intramuscular site served as a negative control and was irrigated with normal saline before closure. Birds were euthanized in batches at 1, 4, 6, 8, 10, and 12 weeks following implantations to histologically evaluate the fate of implants. Unlike previous studies in mammalian models, bone marrow failed to produce de novo bone formation in this pigeon model. Instead, statistical analysis of semi-quantitative and quantitative histologic data revealed a significant difference from controls in the extent of neovascularization in favor of the bone marrow after 6 and 10 weeks. All DBM explants showed new bone at retrieval with the exception of tubular implants at first week. The most reactive part of the implants was found to be their interior area between the periosteal and endosteal shells followed by the area at the implant-muscle interface. Nevertheless the latter was mostly associated with the DBM chips. On the other hand, quantitative measurements showed the overall amount of new bone to be greater at the TDBM implant sites (80.28% ± 8.94) and chipped DBM showed to be significantly inferior in this regard (57.64% ± 3.12).In the second experiment, osseous critical sized defects were surgically created in the ulnar midshafts of 60 adult pigeons in which TDBM or CDBM implants served to augment the healing process. Autologous bone graft (ABG), harvested from the sternal keel was used in a third control group. Created fractures were stabilized using an external skeletal fixator-intramedullary tie-in device. Results were evaluated by radiography and histology after 4, 8, 12 and 24 weeks postoperatively. Although ABG group demonstrated greater improvement in comparison to DBM groups early in the course of this study, they failed to advance after the eighth postoperative week with the overall radiographic score of 2.95 ± 0.15, histological score of 6.87 ± 0.44 and bone area of 68.41 ± 3.79. Conversely, both DBM groups and particularly TDBM demonstrated promise with regards to their continuous improvement over time. Nevertheless, CDBM proved to be inferior to TDBM in overall healing qualities with overall radiographic score of 1.5 ± 0.11, histological score of 5.37 ± 0.32 and bone area of 41.32 ± 3.83. Despite the early dominance of ABG, TDBM finally overtook autografts after week 12 and such was proved to be significant by 24 postoperative week (2 fractures fully healed versus only one complete healing for ABG). However the overall average of values for this group remained lower than that of the ABG (radiographic score of 2.40 ± 0.21, histological score of 8.07 ± 0.77 and bone area of 59.3 ± 7.47).This study showed that avian DBM is an osteoinductive, biocompatible, biodegradable, safe and osteoconductive material in pigeons. Results from the orthotopic study showed promise as TDBM implants appeared as efficacious as autografts in the healing of osseous critical sized defects. This confirmed that implant geometry (shape and size) could affect DBM associated osteogenesis in avian species. We suggested osteoconduction augments the magnitude of the effects in larger implants

Identifying and Leveling the Factors Affecting the Maturity of the Organization's IT Using the Interpretive Structural Modeling and Fuzzy MICMAC Approach

Considering the role of information technology maturity in increasing organizational competitiveness, this study aims to propose a model for identifying the factors affecting the IT organization processes based on the ITIL and COBIT frameworks, as well as determining the causal relationships and leveling these factors using a hybrid approach of ISM and Fuzzy MICMAC. This research is classified as a descriptive-survey, and applied research. researcher-made questionaries’ to collect data. The statistical population of this study consists of senior managers and senior experts of FANA Company. A limited number of experts can provide this study’s required information, the sample size was equal to the statistical population (consisting of 15 organizational experts). In order to demonstrate the capability of the proposed model, this model was implemented at Fantaff Company. The findings showed that, based on the factors mentioned in these frameworks and according to the organizational expert’s views, there are14 factors influencing the maturity of IT in this organization in the form of three areas of “strategy and planning of IT services”, “acquisition and implementation of IT services”, and “monitoring and supporting IT services”. In addition, after analyzing the causal relations among these factors, "applying standards in IT", "existence of organizational structure of IT", and "optimal network infrastructure and data center" were determined as the most effective, the most Affected, and the most independent factors in the IT maturity model of Iranian organizations, respectively, which played a significant role in determining the level of maturity of IT organizations

Structural analysis of factors affecting the development of IT-based platform services

Today, businesses are considered the main factor in improving the country’s economy and creating employment through the implementation of policies that foster entrepreneurship and the establishment of supportive institutions. Therefore, the current research seeks to identify factors that affect the development of IT-based platform services. In this research, a questionnaire based on the fuzzy Delphi method was used to identify the factors. The statistical population of this research consists of 20 managers, professors, specialists, and experts who are associated with start-up companies. Due to the small size of the population, the entire population was considered as a sample. In this research, the influential factors were identified using the fuzzy Delphi method. The results of the research showed that providing access to financial resources is the most important factor affecting the development of IT-based platform services. On the other hand, improving the entrepreneurial environment through the establishment of laws is considered the least important factor in this area

The Unplanned Online Buying Behavior in Social Commerce: The Role of Users’ Pseudo-social Interactions (Case: Users of Instagram Network)

Today, the costumer is the key to success or failure of a company, so examination of factors affecting the behavior of costumers, especially the intention of buying, is important. One of these buying behaviors that plays a key role in maintaining market equilibrium is the unplanned buying behavior which is decision making at the moment.  In this study, factors affecting the unplanned buying behavior (entertainment) are considered in social networks. Then, the conceptual models, based on the data from 384 participants who had experienced online purchasing on the Instagram, were analyzed using AMOS software. The validity and reliability of the instrument were evaluated and proved. The results showed that elements such as enjoyment of similarities and expertise, visual and interactive attractions spread a positive impact on enhancing the tendency to unplanned buying. In addition, hyper-social interactions had positive impact on the tendency and willing to go for impulsive buying

International Nosocomial Infection Control Consortiu (INICC) report, data summary of 43 countries for 2007-2012. Device-associated module

We report the results of an International Nosocomial Infection Control Consortium (INICC) surveillance study from January 2007-December 2012 in 503 intensive care units (ICUs) in Latin America, Asia, Africa, and Europe. During the 6-year study using the Centers for Disease Control and Prevention's (CDC) U.S. National Healthcare Safety Network (NHSN) definitions for device-associated health care–associated infection (DA-HAI), we collected prospective data from 605,310 patients hospitalized in the INICC's ICUs for an aggregate of 3,338,396 days. Although device utilization in the INICC's ICUs was similar to that reported from ICUs in the U.S. in the CDC's NHSN, rates of device-associated nosocomial infection were higher in the ICUs of the INICC hospitals: the pooled rate of central line–associated bloodstream infection in the INICC's ICUs, 4.9 per 1,000 central line days, is nearly 5-fold higher than the 0.9 per 1,000 central line days reported from comparable U.S. ICUs. The overall rate of ventilator-associated pneumonia was also higher (16.8 vs 1.1 per 1,000 ventilator days) as was the rate of catheter-associated urinary tract infection (5.5 vs 1.3 per 1,000 catheter days). Frequencies of resistance of Pseudomonas isolates to amikacin (42.8% vs 10%) and imipenem (42.4% vs 26.1%) and Klebsiella pneumoniae isolates to ceftazidime (71.2% vs 28.8%) and imipenem (19.6% vs 12.8%) were also higher in the INICC's ICUs compared with the ICUs of the CDC's NHSN