Search results

This paper aims to explore the consequence of chemical reaction on three-dimensional flow, heat and mass transfer of a Casson nano liquid over exponentially stretching surface. A numerical technique of RKF-45 method is applied to resolve the nonlinear ordinary differential equations, which are obtained by applying the similarity transformation to the nonlinear partial differential system.

Role of significant parameters on flow fields are observed graphically. Also, the strength of heat exchange (Nusselt number) and the strength of mass exchange (Sherwood number) are analyzed.

The results of numerical modeling showed that, the Prandtl number plays a key role in reducing the temperature of the system. Further, the radiation parameters manufacture a lot of heat to operating fluid and higher temperature exponent parameter and enhance the temperature of the fluid.

The results of numerical modeling showed that, the Prandtl number plays a key role in reducing the temperature of the system. Further, the radiation parameters manufacture a lot of heat to operating fluid and higher temperature exponent parameter and enhance the temperature of the fluid.

Customer lifetime value (CLV) is one of the key indicators to measure the success or health of an organization. How can an organization assess the organization's customers' lifetime value (LTV) and offer relevant strategies to retain prospective and profitable customers? This study offers an integrated view of different methods for calculating CLVs for both loyalty members and non-membership customers.

This study outlines eleven methods for calculating CLV considering (1) the deterministic aspect of NPV (Net present value) models in both finite and infinite timespans, (2) the geometric pattern and (3) the probabilistic aspect of parameter estimates through simulation modeling along with (4) the migration models for including “the probability that customers will return in the future” as a key input for CLV calculation.

The CLV models are validated in the context of complementary and alternative medicine (CAM)in the healthcare industry. The results show that understanding CLV can help the organization develop strategies to retain valuable customers while maintaining profit margins.

The integrated CLV models provide an overview of the mathematical estimation of LTVs depending on the nature of the customers and the business circumstances and can be applied to other business settings.

The purpose of this paper is to provide a selected bibliography of recent resources on library instruction and information literacy.

Introduces and annotates English-language periodical articles, monographs and other materials on library instruction and information literacy published in 2013.

Provides information about each source, discusses the characteristics of current scholarship and describes sources that contain unique scholarly contributions and quality reproductions.

The information may be used by librarians and interested parties as a quick reference to literature on library instruction and information literacy.

The purpose of this paper is to examine the use of various search engines and meta search engines by Indian academics for retrieving information on the web. It also aims to know whether the academics use search strategy of various search engines for retrieval of information or not, and how the Indian academics learn the various search strategies for using search engines.

The data collection instruments used for this study were a questionnaire and follow-up interviews with students and faculty members. The questionnaire consisted of various questions which were designed to elicit the use of search engines, search strategies and method of leaning the search strategies of search engines. A total of 450 questionnaires were distributed, out of which 300 duly filled copies were returned, constituting a 66.66 percent response rate. The data thus collected were analysed with the help of the SPSS (version 19.0) statistical package to present the findings in percentage and test the formulated hypothesis.

The findings of the survey show that the majority of the respondents most frequently used Google (91.93 percent) and Yahoo (43.85 percent) while Dogpile and Ixquick (35.78 percent each) were less frequently used by the respondents. 65.26 percent of respondents used the search strategy for retrieving information. The study also shows that there is a significant relationship between the respondent's profession and use of search engines (p=0.018) as well use search strategies of search engines (p=0.028). Method of learning the search strategies of search engines is also associated with the respondent's profession (p=0.008).

The results of this study have clear implications for information literacy instruction in the context of search engines. The study recommends that there is a need to conduct intensive training for students and faculty members in order for them to acquire the essential search strategies for effective information retrieval. The findings of the study will be helpful to concerned authorities to enhance the effective and efficient use of search engines by the respondents.

Binder jetting is a promising route to produce complex copper components for electronic/thermal applications. This paper aims to lay a framework for determining the effects of sintering parameters on the final microstructure of copper parts fabricated through binder jetting.

The knowledge gained from well-established powder metallurgy processes was leveraged to study the densification behaviour of a fine high-purity copper powder (D₅₀ of 3.4 µm) processed via binder jetting, by performing dilatometry and microstructural characterization. The effects of sintering parameters on densification of samples obtained with a commercial water-based binder were also explored.

Sintering started at lower temperature in cold-pressed (∼680 °C) than in binder jetted parts (∼900 °C), because the strain energy introduced by powder compression reduces the sintering activation energy. Vacuum sintering promoted pore closure, resulting in greater and more uniform densification than sintering in argon, as argon pressure stabilizes the residual porosity. About 6.9% residual porosity was obtained with air sintering in the presence of graphite, promoting solid-state diffusion by copper oxide reduction.

This paper reports the first systematic characterization of the thermal events occurring during solid-state sintering of high-purity copper under different atmospheres. The results can be used to optimize the sintering parameters for the manufacturing of complex copper components through binder jetting.

The purpose of this study is to identify and analyze the barriers associated with the adoption of Industry 4.0 technologies in agricultural supply chains.

The study initially identified thirteen barriers by conducting a literature review and semi-structured interviews with key stakeholders. Subsequently, these barriers were validated and modeled using an integrated Fuzzy Delphi-ISM approach. Finally, MICMAC analysis was employed to categorize the barriers into distinct clusters.

The results provide considerable insights into the hierarchical structure and complex interrelationships between the barriers as well the driving and dependence power of barriers. Lack of information about technologies and lack of compatibility with traditional methods emerged as the two main barriers which directly and indirectly influence the other ones.

The robust hybrid Fuzzy Delphi and ISM techniques used in this study can serve as a useful model and benchmark for similar studies probing the barriers to Industry 4.0 adoption. From a theoretical standpoint, this study expands the scope of institutional theory in explaining Industry 4.0 adoption barriers.

The study is timely for the post-COVID-19 recovery and growth of the agricultural sector. The findings are helpful for policymakers and agriculture supply chain stakeholders in devising new strategies and policy interventions to prioritize and address Industry 4.0 adoption barriers.

It is the first comprehensive, multi-country and multi-method empirical study to comprehensively identify and model barriers to Industry 4.0 adoption in agricultural supply chains in emerging economies.

The internet growth has created a new scientific communication system with new facilities that are competing with the traditional sources of information. The present study investigated impact of internet use on academic performance of teachers and researcher in university setup. The aim of this paper is to find out how these academics use internet sources and services? What is the user's satisfaction level with internet sources and services? And what problems has the user encountered when searching the information on the internet. It further aims to know how the user compares the internet sources with traditional information sources.

Questionnaires were distributed to randomly selected teachers and researchers in Kuvempu University, Karnataka state. Total 200 questionnaires were distributed out of which 140 duly filled questionnaires were returned. The questionnaire consisted of various questions which are designed for the teachers and researchers to elicit the impact of internet use on their academic performance.

This study has demonstrated the high use of the internet sources and services by teachers and researchers in university setup. Most of them used internet in support of their study and teaching. Majority of respondents learnt to use the internet through self-instruction and trial and error, with the help of friends and by reading books or papers. Study results also indicated that internet has made an impact on their academic performance (i.e. in writing more research papers, in doing better research, better learning experience, etc.).

This is the comprehensive study on the impact of internet sources and services on the academic performance of teachers and researchers in the university environment. Findings of the study will be helpful to university authority to enhance the internet facilities for effective and efficient use by the teachers and researchers. The study also suggested that there is a need to focus on opportunities for providing training on use advanced internet search skills to the academic community. Concerned authorities also need to enhance the internet bandwidth to increase the internet speed.

This paper aims to examine the perception and use of e‐resources and the internet by the engineering, medical and management academics in Bangalore City, India. The prime objective is to find out how academics compare e‐sources with print sources and how they perceive the advantages of e‐sources and problems for accessing them. It further aims to establish the extent of internet use, the purpose of such use and factors influencing it.

Data were collected from 300 students and faculty members in selected engineering, medical and management colleges of Bangalore City. The questionnaire consists of 15 main questions with many of them having a number of subsidiary questions. The questions are designed for the students and faculty members to elicit their experience with the e‐sources and internet use for their study and research work.

Study results show that the students and faculty who participated in this survey are aware of e‐sources and also the internet. Even though a majority of the academic community use electronic information sources for their academic‐related work, most of them prefer print to electronic information sources. Many of the students and faculty learned about the electronic information sources either by trial and error or through the advice of friends.

Librarians need to reallocate more budget to expand the availability of electronic resources for students and faculty. Library professionals should also help users to ascertain what high‐quality free resources are available on the internet and how to search these resources more effectively and efficiently.

This is the first comprehensive study of the use of e‐sources and internet by engineering, medical and management students and faculty members in India. Its findings will help library professionals in respective college libraries to plan for effective and efficient use of the internet to fulfil information requirements of the students and faculty members.

The purpose of this study is to explore the use of smartphone-embedded microelectro-mechanical sensors (MEMS) for accurately estimating rotating machinery speed, crucial for various condition monitoring tasks. Rotating machinery (RM) serves a crucial role in diverse applications, necessitating accurate speed estimation essential for condition monitoring (CM) tasks such as vibration analysis, efficiency evaluation and predictive assessment.

This research explores the utilization of MEMS embedded in smartphones to economically estimate RM speed. A series of experiments were conducted across three test setups, comparing smartphone-based speed estimation to traditional methods. Rigorous testing spanned various dimensions, including scenarios of limited data availability, diverse speed applications and different smartphone placements on RM surfaces.

The methodology demonstrated exceptional performance across low and high-speed contexts. Smartphones-MEMS accurately estimated speed regardless of their placement on surfaces like metal and fiber, presenting promising outcomes with a mere 6 RPM maximum error. Statistical analysis, using a two-sample t-test, compared smartphone-derived speed outcomes with those from a tachometer and high-quality (HQ) data acquisition system.

The research limitations include the need for further investigation into smartphone sensor calibration and accuracy in extremely high-speed scenarios. Future research could focus on refining these aspects.

The societal impact is substantial, offering cost-effective CM across various industries and encouraging further exploration of MEMS-based vibration monitoring.

This research showcases an innovative approach using smartphone-embedded MEMS for RM speed estimation. The study’s multidimensional testing highlights its originality in addressing scenarios with limited data and varied speed applications.

The capability of steel columns to support their design loads is highly affected by the time of exposure and temperature magnitude, which causes deterioration of mechanical properties of steel under fire conditions. It is known that structural steel loses strength and stiffness as temperature increases, particularly above 400 °C. The duration of time in which steel is exposed to high temperatures also has an impact on how much strength it loses. The time-dependent response of steel is critical when estimating load carrying capacity of steel columns exposed to fire. Thus, investigating the structural response of cold-formed steel (CFS) columns is gaining more interest due to the nature of such structural elements.

In this study, experiments were conducted on two CFS configurations: back-to-back (B-B) channel and toe-to-toe (T-T) channel sections. All CFS column specimens were exposed to different temperatures following the standard fire curve and cooled by air or water. A total of 14 tests were conducted to evaluate the capacity of the CFS sections. The axial resistance and yield deformation were noted for both section types at elevated temperatures. The CFS column sections were modelled to simulate the section's behaviour under various temperature exposures using the general-purpose finite element (FE) program ABAQUS. The results from FE modelling agreed well with the experimental results. Ultimate load of experiment and finite element model (FEM) are compared with each other. The difference in percentage and ratio between both are presented.

The results showed that B-B configuration showed better performance for all the investigated parameters than T-T sections. A noticeable loss in the ultimate strength of 34.5 and 65.6% was observed at 90 min (986℃) for B-B specimens cooled using air and water, respectively. However, the reduction was 29.9 and 46% in the T-T configuration, respectively.

This research paper focusses on assessing the buckling strength of heated CFS sections to analyse the mode of failure of CFS sections with B-B and T-T design configurations under the effect of elevated temperature.