درخت حوزه‌های تخصصی

The present research aims to design strategic management model in technical and vocational training. The research has qualitative design and for data analysis and classification, thematic Analysis Method (Thematic Network) was applied. The statistical population of the study consisted of experts of the Iran Technical and Vocational Training Organization. The number of 13 participants were selected by purposive method based on experience and expertise criteria. For data collection, the structured and semi-structured interview were used. The data collection process was performed using theoretical saturation technique until it reached the iteration and saturation stage. For data validation, triangulation method was used. Content validity index (CVI) and Content Validity Ratio (CVR) were used to decision making and assess the consensus of experts and to evaluate the reliability, Holstein coefficient was considered. At the end of the thematic analysis process, the conceptual model of research was designed based on the themes extracted and the theoretical foundations of the research. Results showed that number of eight inclusive themes, including strategic goals, external environment analysis, internal environment analysis, strategic analysis, educational goals, technical and vocational training plans, implementation of technical and professional training and evaluation plans, as well as 33 organizing themes and 160 basic themes were recognized for the strategic management model in technical and vocational training. According to results, this model can provide promisingly a suitable framework for strategic management execution in skill training.

VANET (Vehicular Ad-hoc Network) is a developing technology, which is a combination of cellular technology, ad-hoc network & wireless LAN to improve the safety of vehicle as well as driver. VANET communication can be of two types, first one is broadcast and second one is unicast. Either communication may be broadcast or unicast both are sensitive to different types ofassaults, for example message forgery, (DOS) denial of service, Sybil assault, Greyhole, Blackhole & Wormhole assault. In this paper machine learning method is used to detect the wormhole assault in VANET’s multi-hop communication. We have created a scenario of VANET by using AODV routing protocol on NS-3.24.1 simulator, which utilizes the overall mobility traces generated by the simulator SUMO-0.32.0 to model the wormhole assault. The simulation is performed by using NS-3.24.1 simulator, and the statistics created by flow monitor are collected. The collected data is pre-processed and the k-NN & Random Forest algorithms are applied on this data, to make the model such type so that it can memorize the wormhole attack. The novelty of this research work is that with the help of proposed detection & prevention technique, vehicular ad-hoc network can be made free from wormhole assault by using ML approach. The performance of proposed machine learning models is compared with existing work. In this way it is clear that our proposed approach by using ML is powerful tool by which the wormhole assaults can be detected in VANETs. A scheme based on packet lease and cryptographic techniques is used to prevent the wormhole attack in VANET

The condition of the hotel's competitiveness is a strong brand. The introduction of digital marketing in the strategy of hotel branding creates new opportunities for hotels when interacting with guests through digital channels. The purpose of this study is to develop theoretical and practical measures to improve the effectiveness of marketing strategies in hotel branding using digital tools. To achieve the goal of the study was conducted research on targeted branding some of the largest hotel chains. The results of the analysis showed that in the process of branding at each stage the corresponding goals have achieved by means of advertising, marketing, public relations management, personnel selection, corporate culture.This study substantiates the main tools of the strategy of the Digital Marketing and Sales. The brands need to constantly monitor changes in market positions and audience sentiment using all the features and channels. The priorities should be implemented by performing key tasks, in particular such astimely measurements as far as brand experience has a positive effect on customer satisfaction and loyalty.