Ketohydrazone complexes as potential emitting material in OLED

Abstract Ketohydrazone is a molecule that is able to act as a bidentate ligand through the O of C=O and N of N=C in the molecule. Three ketohydrazone ligands had been fully synthesized through the condensation reaction between 2- hydroxynaphthaldehydes with various hydrazides: salisylic hydrazide, benzyhydrazide and 2-furoic acid hydrazide in a 1:1 stoichiometry. The ligands had been characterized using infrared, 1HNMR and ultraviolet-visible spectrometer. Complexation reaction between all ligands and metals, with a stoichiometry of 1:2 for Zn (II) : ligand and 1:3 for Al(III) : ligand were carried out. All six complexes obtained were characterized using FTIR and UV-Vis spectrometer. The fluorescence properties of each ligands and complexes were investigated using luminescence spectrofluorometer excited at 406 nm. It was found that the compounds emitted blue light at ? max = 470 nm. Results showed that all the ligands and molecules synthesized have the fluorescence properties and complexation with metal enhanced the intensity of the fluorescence. It was observed that complex of Al(NDB)3 showed the best potential as an emitting material for OLED as it has the highest fluorescence intensity compared to others. Abstrak Ketohidrazon merupakan sebatian molekul yang berupaya berfungsi sebagai ligan bidentat melalui O daripada C=O dan N daripada N=C di dalam molekulnya. Tiga ligan ketohidrazon telah berjaya disintesis melalui proses kondensasi antara 2- hidroksinaftaldehida dan beberapa kumpulan hidrazida, salisilik hidrazida,, 2-furoik hidrazida, dan benzihidrazida.mengikut nisbah stoikiometri 1 : 1. Semua ligan yang telah disintesis dicirikan melalui spektroskopi IR, UV-Vis dan 1H-RMN. Tindak balas pengkompleksan antara ligan yang telah disintesis dengan dua logam yang berasingan, iaitu aluminium dan zink telah dijalankan dengan nisbah ion ligam : ligan 1 : 3 bagi pengkompleksan dengan aluminium dan 1 : 2 bagi pengkompleksan dengan zink. Enam kompleks yang terhasil dicirikan melalui spektroskopi IR dan UV-Vis. Ciri-ciri pendarfluor bagi tindak balas pengkompleksan dan ligan yang terhasil telah dikaji menggunakan spektrometer pendarfluor pada panjang gelombang pemancaran 405nm. Didapati sebatian-sebatian tersebut memancarkan cahaya biru pada ? max = 470 nm. Hasil yang diperolehi menunjukkan bahawa semua ligan dan kompleks yang disintesis menunjukkan sifat pendarfluor dan pengkompleksan dengan logam dapat meningkatkan keamatan pendarfluornya.. Kompleks Al(NDB)3 menunjukkan potensi yang terbaik sebagai bahan pemancar dalam diod pemancar cahaya organik (OLED) memandangkan kompleks ini menunjukkan keamatan pendarfluor yang tertinggi

A study on level of awareness and knowledge about waqf among academy of contemporary islamic studies students / Muhammad Adeeb Mohd Ali Bahari.

Waqf literally means to prevent or to restrain or to abstain. Waqf according to Islam means devoting something for the cause of Allah or the basic purpose is good task for Allah. The study aims to identify the level of awareness and knowledge among ACIS students. In general, students are aware about the concept of waqf but some of them are still low on their level of knowledge about waqf. The issue here is on the level of knowledge among Islamic studies student are low although it is crucial for students to masterty the knowledge pertaining waqf. A quantitative study was conducted using survey questionnaire to further investigate the above mentioned issue. Therefore, the students must gain their knowledge and aware about concept of waqf and implement waqf in their life

Fuzzy control of parabolic antenna with friction compensation

In this paper a fuzzy logic controller was developed for a parabolic dish antenna system. Friction is one of the disturbances associated such systems and was represented with dead zone in the Simulink block. The effect of the disturbance due to the friction was investigated by simulation using Simulink/MATLAB 2012a software. The results obtained from the system with the fuzzy logic controller were compared with the ones obtained with equivalent proportional derivative controller and it showed that with the fuzzy logic controller the system had better performance and also demonstrates its ability to reduce the effect of friction in parabolic antenna dish systems and most likely other nonlinearities in such systems

Identification of vibrio species isolated from marine fish using polymerase chain reaction

Vibrio species are found in marine and estuarine environments. Vibriosis can cause more than 50% mortality in fish culture facilities once an outbreak is in progress. The objectives of this study were to subculture and identify Vibrio spp. that were isolated previously from marine fish; to develop a technique for simultaneous identification of several Vibrio spp. (V. alginolyticus, V. parahaemolyticus, V. fluvialis and V. vulnificus) using polymerase chain reaction (PCR); and to compare the rapid identification kit and PCRtechniques commonly used for the identification of the Vibrio spp. In this study, 20 isolates from four Vibrio species, which consisted of five eachof V. alginolyticus, V. parahaemolyticus, V. fluvialis and V. vulnificus isolates were provided by National Fish Health Research Centre (NaFisH). The species of Vibrio were identified using an identification kit, API 20E system. These organisms were isolated from various marine fish such as Asian Seabass (Latescalcarifer), Grouper (Epinepheluscoioides), Silver Pomfret (Pampusargenteus) and Red Snapper (Lutjanuscampechanus). The isolates were previously stored at -80°C and subcultured onto TSA+. The pure cultures were then transferred to TSB+. These isolates were subjected to DNA extraction. Once the DNA is ready, PCR was used to optimise the products with the designated primers. All the PCR products were electrophoresed through 1% agarose gel for 1 h. The designated primers in this study were found suitable for the detection of V. alginolyticus,V. parahaemolyticus,V. fluvialis and V. vulnificus.Using the API 20E system, 15% (3/20) isolatesof Vibrio spp. were negative, indicating the the PCR technique is still required to confirm the result obtained by the use of the API 20E system

Identifying the Crack Nature Using b-Value Acoustic Emission Signal Analysis

Concrete is an important constituent of structures. The strength performance of the concrete decrease due to several factors. Concrete suffers from deterioration at a later stage. Early and constant identification of concrete deterioration is necessary. Nowadays, non-destructive testing (NDT) is widely used especially on continuous real-time monitoring system with minimum labor involvement. It could also be used to discriminate the different types of damage occurring in reinforced concrete (RC) beam and real structure. In this research was monitored by using Acoustic Emission testing and it have several analysis such as RA-value, b-value, intensity signal analysis and historical index. To determine the acoustic emission signals for concrete structures and cracking identification this research using b-value analysis. b-value signals analysis contain useful information about damage mechanisms. A high b-value arises due to a large number of small AE hits, it representing new crack formation and slow crack growth, whereas a low b-value indicates faster or unstable crack growth accompanied by relatively high amplitude AE in large number. Reinforced concrete beams measuring of size 150 mm 250 mm 1500 mm were used during the acoustic emission test. A four-point load test was carried out on specimens until cracking occurred. The signals generated from the equipment were used for the analysis process, and the values are compared to define and summarise type of cracking and cracking processes

Fuzzy control of parabolic antenna with backlash compensation

A fuzzy logic based controller (FLC) was proposed for position control of a parabolic dish antenna system with the major aim of eradicating the effect backlash disturbance which may be present in the system. The disturbance is nonlinear and is capable of generating steady state positional errors. Simulation results obtained using SIMULINK/MATLAB 2012a were compared with those obtained when the controller was proportional-derivative controller (PDC). The fuzzy controller portrays that it has the capability of reducing the noise due to backlash and possibly others more than the proportional-derivative controller

Design of QFT-based self-tuning deadbeat controller

This paper presents a design method of self-tuning Quantitative Feedback Theory (QFT) by using improved deadbeat control algorithm. QFT is a technique to achieve robust control with pre-defined specifications whereas deadbeat is an algorithm that could bring the output to steady state with minimum step size. Nevertheless, usually there are large peaks in the deadbeat response.By integrating QFT specifications into deadbeat algorithm, the large peaks could be tolerated. On the other hand, emerging QFT with adaptive element will produce a robust controller with wider coverage of uncertainty. By combining QFT-based deadbeat algorithm and adaptive element, superior controller that is called self tuning QFT-based deadbeat controller could be achieved. The output response that is fast, robust and adaptive is expected. Using a grain dryer plant model as a pilot case-study, the performance of the proposed method has been evaluated and analyzed. Grain drying process is very complex with highly nonlinear behaviour, long delay, affected by environmental changes and affected by disturbances. Performance comparisons have been performed between the proposed self-tuning QFT-based deadbeat, standard QFT and standard dead-beat controllers. The efficiency of the self-tuning QFT based dead-beat controller has been proven from the tests results in terms of controller’s parameters are updated online, less percentage of overshoot and settling time especially when there are variations in the plant

Disequilibrium and divinity salience as invariant structures in the halal executives’ experience of eudaimonia / Jalilah Ahmad, Rosmimah Mohd. Roslin and Mohd. Ali Bahari Abdul Kadir.

The global Halal industry is large and continues to grow as the global Muslim population increases in size and dispersion. There are 1.84 billion Muslims today spread over 200 countries and is expected to increase to 2.2 billion by 2030. The industry will be worth USD6.4 trillion by the end of 2018 with more non-traditional players and emergent markets. The stakes are high with pressures to generate novel and sustainable practices. This goes beyond systems and hard skills as it needs to cut into the self – the person of virtues in virtuous acts, not because they “have to” but because it is the purpose of humankind or his telos - to be “living well” and “acting well” or eudaimonia. This study seek to explore Halal executives’ lived experience of “eudaimonia.”. Using Giorgi’s descriptive psychological phenomenological method for data analysis, the study elicits two distinct invariant structures – ‘disequilibrium in status quo’ and ‘divinity salience’

Servant leadership from the Muslim perspective

This paper has been prepared to discuss contemporary issues in leadership, and also serves as a means of reviewing the literature in the area of Servant Leadership. Islamic leadership principles and a spiritual dimension in leadership are touched upon. The main purpose of this paper is to better understand the aforesaid leadership terms through empirical data, since most Islamic leadership theories are hardly supported by on the ground facts and realities. This paper also modestly compares the three leadership principles from existing literature and, in the end, tests the practical issues that came into the sight of the authors from the survey results. The authors hope that this paper, to a certain extent, will be able to explore previous pioneering work that has been conducted in the field of leadership. We hope that this piece of research will stimulate specific interest in the areas of servant leadership and Islamic leadership in Muslim-minority countries in other parts of the world

Peranan juruukur tanah dalam industri pembinaan

Land surveyors works are divided in many areas, for example, in the production of maps, coordinates and position determination, hydrography, cadastral and construction. Some of the Land Surveyors faced problems like not being paid for jobs carried out and some were given jobs which are not clearly defined. The aim of this study is to evaluate the role and problems faced by the land surveyor in the construction industry. The objectives of this study are to identify the scope of work of land surveyors in the construction industry, to identify the problems faced by land surveyors in the construction industry, to find out about payment made to the land surveyors working in the construction industry and to find out the views and opinion regarding freelance land surveyor. This study focuses on land surveyors who are involved in the construction field. The study is carried out by interviews and questionnaires. A total of 30 sets of questionnaires have been collected from the land surveyor and 5 Land Surveyors were interviewed.The data is analyzed using Average Index. From the study, the scope of work for the land surveyor in construction industry are demarcation, setting out the pilling point, marking the grid line according to the plan from engineer/architect ,produce plan, detail survey, and leveling. The problems faced by the land surveyor in construction industry are late payment, issue in cooperation with other parties that does not understand the work of land surveyor and competition from freelance land surveyors.Regarding the payments to the land surveyors, the land surveyors ‘moderate agree’ with the rate of payment. The payments are usually late and only half are received although they had finished their work. From the study, the presence of freelance still does not pose a threat to the Licensed Land Surveyor