The IR spectra of methanol as a dilute solution in and in the vapour phase have been measured between 2500 and 4000 CCl 4 cm~1 and between 1000 and 1100 cm~1 in order to better understand the nature of the hydrogen bonding equilibria present. The integrated absorption coefficient of the monomeric OwH stretching mode is calculated as (2.157 ^0.025) ] 104 m mol~1 and the proportion of the components associated with the three principal bands and a fourth weaker band estimated. Seven possible components were considered which were monomer, closed cyclic and open chain dimers, trimers and tetramers. Ab initio calculations were carried out on these components using six basis sets up to the restricted Hartree Fock 6-311]]G(3df,3pd) level. Relevant calculated infrared wavenumber and intensity values, OwHÉ É ÉO bond lengths and hydrogen bonding energies are reported. The cyclic dimer is shown to be a transition state with the open dimer forming a stable minimum energy form. In the case of the trimer and tetramer the hydrogen-bonding energy is calculated to be, respectively, 12 and 32 kJ mol~1 greater in the cyclic form than in the open form with good agreement at the RHF6-31G(d) and RHF 6-31]]G(d,p) levels. The e †ect of basis set superposition errors are found to be relatively small. The experimental and theoretical results are consistent with an equilibrium involving monomer, open dimer, cyclic trimer and cyclic tetramer.

No abstract

<span>The ‘Movie Ticket Purchase System’ is a web-based application. In this application, people can purchase movie tickets from all movie theatres in Bangladesh. Before purchasing a ticket, people have to do registration or login. This website builds by PHP and JavaScript for back-end; HTML, CSS for front-end. All steps of the software development life cycle are addressed properly to develop and implement the software. This website has three panels: one for the Admin, one for the Theatre Assistant and another for the Customer/User. Admin can insert the theatres, and Theatre Assistant handled maximum manual works on the website like movie add, delete, stop running, screen adds, etc. This is the first website in Bangladesh where people can purchase tickets from multiple movie halls and the site is only dedicated to this purpose. The website is very user-friendly and attractive that can give comfort to the end users. Also, the theater owners that have no digital platform for selling tickets can be a member of our service and get the opportunity of using digital platform.</span>

The international exchange program plays an important role in improving soft skills and helps graduates’ to be confident to compete in job market. Student can achieve a vast academic knowledge apart from extra-curricular and co-curricular skills through attending exchange program. Therefore, this paper aims at studying the development of students acquired soft skills and the barriers they face to achieve the goal through the exchange program. The data obtained from 87 students who participated in exchange program in different countries of Asia. Besides descriptive statistics, factor analysis was performed to identify the achieved soft skills through exchange program. This study reveals that, a large number of students were attending in exchange program at their own cost and most of the students were from the year 3. Indubitably, Exchange program helps to improve students’ soft skill such as; communication skill, team building ability, adaptability with situation. Moreover, lectures delivered to the students were found interesting. Results of the study are expected to motivate students attending in international exchange program and will offer a right direction to the students to get an expected outcome   Received: 22 June 2021 / Accepted: 13 January 2022 / Published: 5 March 2022

<p class="Abstract">Not all Internet Service Providers provide a sufficient amount of bandwidth to their users. Although the amount of local bandwidth is reasonable, global bandwidth is not satisfactory at all. Based on bandwidth allocation, location and price; service providers capped their users’ global bandwidth i.e., reducing global internet speed. As a consequence, we observe severe global bandwidth limitation among Internet users. In this article, we implement a flexible and pragmatic solution for Internet users to bypass global bandwidth restriction. To achieve robust global bandwidth, we utilize a combination of communication technologies and devices namely, Internet Exchange Point, Virtual Private Network, chain VPN technology etc. In this project, we show that internet speed of international route i.e., global bandwidth can enhance significantly if there are multiple ISPs use a common IXP and at least one of those ISPs provides pleasant global bandwidth. Usually, regional ISPs use a common IXP to route their local traffic using local bandwidth within the region without wasting global bandwidth. We show that using our proposed method global internet speed of a user can raise several times effectively utilizing assigned local bandwidth. In addition, we also implement a geo-restriction bypassing technique integrating an offshore ISP with local ISP using VPN. Thus, we enjoy tremendous Internet speed along with unrestricted access to the websites.</p>