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The free vibration analysis of cyclic symmetric structures is considered as a Hermitian eigenvalue problem in semi‐complex domain using subspace iteration method is presented. The trial vectors are selected using a modified Ritz vector scheme. A modified convergence criterion which gives true error estimates which is suited for clustered eigenvalue problems is presented. Also the effect of purification of trial vectors on convergence is considered.

The purpose of this paper is to present an up-to-date survey on the non-orthogonal multiple access (NOMA) technique with co-operative strategy, a fast-evolving fifth-generation (5 G) technology. NOMA is used for serving many mobile users, both in power and code domains. This paper considers the power-domain NOMA, which is now discussed as NOMA.

The first part of the paper discusses NOMA-based cooperative relay systems using different relay strategies over different channel models. In various research works, the analytical expressions of many performance metrics were derived, measured and simulated for better performance of the NOMA systems. In the second part, a brief introduction to diversity techniques is discussed. The multiple input and multiple output system merged with cooperative NOMA technology, and its future challenges were also presented in this part. In the third part, the paper surveys some new conceptions such as cognitive radio, index modulation multiple access, space-shift keying and reconfigurable intelligent surface that can be combined with NOMA systems for better performance.

The paper presents a brief survey of diverse research projects being carried out in the field of NOMA. The paper also surveyed two different relaying strategies that were implemented in cooperative NOMA over different channels and compared several performance parameters that were evaluated and derived in these implementations.

The paper provides a scope for recognizable future work and presents a brief idea of the new techniques that can be united with NOMA for better performance in wireless systems.

This paper aims to comprise the new ideas for the efficient implementation to autonomous mobile robot navigation over the complex environment in presence of static obstacles.

The fuzzy decision via probability and its distribution is applied for the generating objective function subject to the robotics path and obstacle avoidance. The present objective function is formed to achieve high level of significance for the real-time obstacle avoidance and the efficiency.

The proposed controller makes a robot take its decision effectively in complex environment in a feasible time. In comparison with other AI approaches the proposed controller reflects that the proposed method outperforms in terms of optimal path and quality of solution. The experimental and simulation results are nearly same.

It has been tested in a complex crowded environment to find shorter path than existed approaches. For the validation, the experimental and simulation result using Matlab Software (R2008) has provided at the end of the paper.

This paper aims to propose an optimized overview of firefly algorithm (FA) over physical-natural impression of fireflies and its application in mobile robot navigation under the natural intelligence mechanism.

The brightness and luminosity are the decision variables in proposed study. The paper achieves the two major goals of robot navigation; first, the optimum path generation and, second, as an obstacle avoidance by co-in-centric sphere-based geometrical technique. This technique comprises the optimum path decision to objective function and constraints to paths and obstacles as the function of algebraic-geometry co-relation. Co-in-centric sphere is the proposed technique to correlate the constraints.

It is found that the present FA based on concentric sphere is suitable for efficient navigation of mobile robots at the level of optimum significance when compared with other approaches.

The paper introduces a novel approach to implement the FA for unknown and uncertain environment.

The purpose of this paper is to make a contribution to the benchmarking literature by examining the historical emergence and evolution of benchmarking using the management fashion perspective as a theoretical lens.

The research approach followed in this paper can be characterized as explorative and theoretical. Insights from different data sources have been combined to provide a rich description of the emergence and evolution of benchmarking.

This analysis casts new light on several aspects of benchmarking’s emergence and evolution pattern. The characteristics of the benchmarking idea give it potential as a fashionable management tool. The widespread popularity and longevity of benchmarking can to a large extent be explained by the efforts of various actors to turn benchmarking into an institution.

The paper is explorative and is limited by a reliance on secondary sources.

Although some researchers have noted that benchmarking could be viewed as a management fashion, management fashion theory has, only to a very limited extent, been used as a theoretical lens in the context of benchmarking. This research paper demonstrates that management fashion theory can provide valuable insights for research on benchmarking.

The Purpose of this study is to prove the possibility of developing low cost mechanical anti – lock braking system (ABS) for the passenger’s safety.

The design methodology of the proposed newer mechanical ABS comprises of two units, namely, the braking unit and wheel lock prevention unit. The braking unit actuates the wheel stopping as and when the driver applies the brake, whereas the wheel lock prevention unit initiates wheel release to prevent locking and subsequent slip/skidding. The brake pedal with master cylinder assembly and double-arm cylinder forms the braking unit, brake pad cylinder, movable brake pad, solenoid valve and dynamo forms the wheel lock prevention unit. The dynamo coupled with the rotor energises/de-energises the solenoid values to direct airflow for applying brake and release it, which makes the system less energy-dependent.

The braking unit aids in vehicle stops, by locking the disc with the brake pad actuated by a double-arm cylinder. The dynamo energises the solenoid valve to activate the brake pad cylinder piston for applying the brake on the disc. Instantaneously, on applying the brake the dynamo de-energises the solenoid to divert the pneumatic flow for retracting the brake pad thereby minimizing the braking torque. The baking torque reduction revives the wheel rotating and prevents slip/skidding.

Mechanical ABS preventing wheel lock by torque reduction principle is a novel method that has not been evolved so far. The system was designed with repair/replacement of the parts and subcomponents to support higher affordability on safety grounds.

The present research aims to examine a range of momentum trading strategies for the tourism and hospitality sector.

The paper followed the methodology of Jegadeesh and Titman (1993) to construct the portfolios. In this methodology, all portfolios were formed and evaluated by their cumulative stock returns over the past J periods and holding the position for the next K periods. In total, nine formation and holding periods were used, represented by 3, 6 and 12. For example, strategy 3–3 (that is, strategy with J = 3 and K = 3) refers to the strategy that stocks are ranked based on their previous three months and then held for the next three months.

The findings demonstrated that none of these momentum investing strategies was profitable. Most of the results, however, show positive, but insignificant momentum returns. This finding can be interpreted as price reversal over a horizon of three to twelve months in the US hospitality and tourism sector. These results are robust to size, different formation and holding combinations, beta and turnover.

Regarding the research limitations, this paper only considers the US tourism and hospitality sector. Therefore, the extension of results to other developed and developing markets should be taken carefully. Also, this paper relies only on the methodology of Jegadeesh and Titman (1993). Other methodologies could be suitable avenues for future research.

Investors and portfolio managers who seek for earning abnormal returns by investing in the US HT stocks can attain their hopes by constructing portfolios based on existing guidelines in the literature and adopting a short-term reversal trading strategy or by buying past losers and selling past winners of the US tourism and hospitality stocks.

This research contributes to the hospitality finance literature by offering the investors who are interested in the US hospitality and tourism sector an uncomplicated trading rule that uses real return data and is expected to generate actual returns. Moreover, the momentum strategy of Jegadeesh and Titman (1993) is never used in the hospitality finance literature.

本研究旨在探討各種可應用於旅遊及酒店業的動量交易策略。

本文按照 Jegadeesh 和 Titman（1993）的研究方法來建造投資組合。使用這研究方法時，所有投資組合均以它們在過去J 時期的累積股票收益和在未來K 時期的持倉來建立及評價的。九個組成方式及持有期被使用，以3、6、12來表示。例如，策略3-3（那就是說，該策略以J = 3和 K = 3）指的策略是以有關的股票基於過去三個月而被分等級，繼而在未來三個月被持有。

研究結果顯示，這些投資策略全沒帶來利潤；唯大部分結果顯示正動能策略報酬，雖報酬是微不足道的。這研究結果或許可理解為在美國酒店及旅遊業為期三至十二個月的價格逆轉。這些結果就規模、不同組成方式和持有組合、beta 和成交量而言是強而有力的。

就研究的局限而言，本文只是考慮美國的酒店及旅遊業；因此，如把研究結果伸延至其它已開發或發展中的市場，則需小心處理。另外，本文只依賴 Jegadeesh 和 Titman（1993）的研究方法，就此，使用其它研究方法會是日後相關研究的適當途徑。

欲透過投資於美國酒店及旅遊股票而尋求賺取異常收益的投資者和投資組合經理可如願以償，方法是基於文獻內現存的準則建造投資組合，以及採用短期的逆轉交易策略，或買入美國酒店及旅遊業過去輸家及賣出過去贏家。

本研究為酒店金融文獻作出貢獻，因研究為對美國酒店及旅遊業有興趣的投資者提供了使用實際收益數據及預期可創造實際回報的簡單交易規則；而且， Jegadeesh 和 Titman（1993）的動量策略從未在酒店金融文獻內被使用過。

To examine metrics used for performance measurement, analysis, and decision-making by insurance cooperatives.

A documentary review and semi-structured interviews of three large insurance cooperatives form the basis of the study.

The analysis suggests insurance co-operatives metrics are consistent with investor-owned companies. These measures do not recognize the cooperative principles and values which consistent the formative basis of these insurance co-operatives.

The insurance co-operatives under examination do not engage in a comparison to other insurance co-operatives; rather comparisons are made against investor-owned companies. As this analysis is used in decision-making and strategy formulation, guiding the direction of the co-operatives the questions must be raised: does the co-operative difference exist in the insurance sector and how (and what) performance analysis tools are used to assess their performance?

There is a paucity of research in the area of metrics and analytics of co-operatives. As such this article expands the academic scope of examination of co-operatives in the context of financial and accounting operations. Additionally, it adds to the ongoing discussion in the academy focused on the nature of co-operatives and the nature of the co-operative difference.

Marketing thought originating from the era of the barter system, gradually evolved into production and sales orientations, with greater emphasis on the process, quality, and selling of products. Thereafter, customer satisfaction as an essential component of the strategic decision process occupies a significant position among various marketing activities. This paper aims to address the inadequate research inputs on determining the time‐specific evolutionary relevance of marketing thought divulging into the essential components of each marketing concept, especially those with customer satisfaction as a dimension in the measurement construct.

A detailed, conceptually integrated analysis of various marketing philosophies is offered to facilitate business executives in examining the philosophy followed by their companies and how to move vertically in pursuance of improved business performance.

In comparison to the Indian market, which is fast becoming an attraction for the developed nations as an investment hub, it is the observed and experienced that public sector corporations are still at the production orientation stage, whereas private companies are predominantly using the sales‐oriented approach. The present status of customer orientation, market orientation and relationship marketing culture in India, is quite distinct from the status in the West as indicated by literature published in the developed countries. Banking, insurance, tourism, and hospitals still need to ensure minimum customer‐oriented services, which are not performed impressively in India.

Being a conceptual and country specific paper, the paper lacks wider generalization of its findings. Moreover, at many instances personal judgment of the authors might have resulted into biased interpretation.

Indian companies, with a few exceptions, lack an adequate orientation to pursue continuous market research in order to sense new developments, which are taking place due to the implementation of advanced information technology leading to greater exposure to customers. It can, thus, be synthesized that with respect to marketing practices in Indian settings, the existing large gap between the theory and implementation is drawing much attention from those concerned with the socio‐economic consequences associated with future business goals.

This paper can help managers in evaluating their business orientation level, but how to improve it further or update them as per ongoing changes in marketing thought and practice, has to be investigated and examined on continuous basis. Hence, empirical testing and validation of the constructs originating from the study have to be pursued, so as to analyze both the nature and the extent of the business orientation of a particular firm.