Ag-doped flowerlike rutile-phase (Ag-FR) TiO2 film with exposed (1 1 0) and (1 1 1) facet was fabricated by a facile hydrothermal method at 150 °C without additive or capping agent with different Ag content ranging from 0.5 to 2 wt%. This study investigated the influence of Ag content in enhancing the photocatalytic activity of AgFR TiO2 film. The flowerlike structures increased the active area of the TiO2 film. XPS revealed that the concentration of Ti3+-oxygen vacancy defects increased upon doping, while TEM revealed that the (1 1 0) and (1 1 1) are highly exposed facets of rods with flowerlike structure. The effectiveness of the Ag-FR TiO2 film was tested on methylene blue degradation under xenon lamp irradiation. The Ag-FR TiO2 film with 1 wt% Ag resulted in the highest methylene blue degradation, which was 20% higher than degradation by the undoped TiO2. The synergistic effect between both (1 1 0) and (1 1 1) facets and Ti3+-oxygen vacancy from Ag play an important role in reduci.....

792 hits

Kraftangan   tembaga   adalah   warisan   yang  telah   lama   wujud   dalam   masyarakat Melayu,  khususnya  di  negeri-negeri  Pantai  Timur  Malaysia.   Keunikan  bekas  bara terbesar   ini  menjadi  satu  daripada  lambang  kegemilangan  pertukangan  tembaga  di negeri Terengganu.   Penyelidikan ini bertujuan untuk mengkaji signifikasi Bekas Bara Besar Terengganu dalam seni  warisan kraf tembaga melalui metodologi penerokaan dan  analisis  reka  bentuk  dan  corak  yang   terdapat  pada  artifak  berkenaan.   Kaedah penyelidikan secara kualitatif dengan pendekatan  sejarah digunakan dalam kajian ini. Analisis  melibatkan  27  responden  yang  terdiri  daripada   empat  orang  sejarawan, sembilan  pakar  kraf  dalam  bidang  tembaga,  lapan  penggiat  dari   agensi  seni  kreatif dan warisan serta enam budayawan tempatan.   Dapatan kajian melalui  pemerhatian, temu bual, dan  analisis dokumen te.....

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Kajian  ini  bertujuan  untuk  menentukan  pengaruh  aspirasi  kerjaya  dan  kepuasan pekerjaan  terhadap  perkembangan  kerjaya  wanita  dalam  bidang  pekerjaan  teknikal. Reka bentuk  tinjauan telah digunakan dalam kajian ini. Di samping itu, pendekatan kualitatif dalam bentuk temu  bual telah  dijalankan dalam kajian ini bagi menyokong data  kuantitatif  yang  diperolehi.  Sampel   kajian  seramai  105  orang  pekerja  wanita yang terdiri daripada 41  jurutera, 26 juruteknik   dan 38 penyelia telah dipilih secara rawak berkelompok di sektor pembuatan di Semenanjung Malaysia.  Instrumen kajian terdiri daripada satu set soal selidik dan protokol temu bual yang telah disahkan  oleh tujuh  orang pakar.  Data  kajian  dianalisis  secara  deskriptif  menggunakan  kekerapan,  peratusan,  min  dan  sisihan  piawai.  Statistik  inferens  iaitu  korelasi  dan  regresi  juga  telah  digunakan  untuk  menguji  10  hipotesis.....

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Kajian  ini  bertujuan  mengenalpasti  hubungan  di  antara  gaya  kepemimpinan  situasi  guru besar,  komitmen  organisasi  dan  keberkesanan  sekolah  di  Bintulu,  Sarawak.  Responden terdiri   daripada  guru-guru  yang  berkhidmat  di  Sekolah  Kebangsaan  dan  Sekolah  Jenis Kebangsaan   Cina  Bintulu,  Sarawak.    Borang  soalselidik  digunakan  sebagai  instrumen pengumpulan data.     Data dianalisis dengan menggunakan statistik deskriptif dan analisis inferensi  seperti  korelasi    Pearson,  ANOVA  dan  Regresi  Pelbagai.     Dapatan  kajian menunjukkan   bahawa   guru   besar    mengamalkan   gaya   kepemimpinan   situasi   dalam mengurus  dengan  mengamalkan  gaya  membimbing   (  34.15%  ),  diikuti  dengan  gaya menyokong  (  33.72%  ),    mengarah  (  20.55%  )  dan   mendelegasi  (  11.58%  ).    Dapatan kajian  juga  menunjukkan  wujud  pengaruh  yang  signifi.....

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The purpose of this study was to develop generic pattern recognition models (GPRMs) based on two-class EEG–MI brain-computer interfaces for wheelchair steering control. Initially, a preprocessing procedure was performed to remove unwanted signals and to identify the optimal duration of MI feature components. Then, feature extraction based on five statistical features, namely min, max, mean, median, and standard deviation were utilized for extracting the MI feature components in three signal domains, namely time, frequency, and time-frequency domains. Seven classification algorithms, namely LDA, SVM, KNN, ANN, NB, DT, and LR were selected and tested to find the best algorithms that could be used for the development of hybrid classifiers. Two datasets were used, namely the BCI Competition dataset (which belonged to Graz University) and the Emotive EPOC dataset (which was collected in this study), with the former being utilized in the development, evaluation, and validation o.....

777 hits

Novel Pentaerythritol (PTL)- and dipentaerythritol (DPTL)-cored dendrimer-like star polymers with AB2 miktoarms [A =poly(L-Lactide); poly(ethylene glycol)-folate] (1g and 2g) were synthesized and characterized by proton magnetic resonance spectroscopy, fourier transform infrared, gel permeation chromatography and differential scanning calorimetric techniques. Anticancer drug doxorubicin was encapsulated into the star polymer nanoparticles using nanoprecipitation technique. The doxorubicin-loaded nanoparticles of the star polymer with PTL core (1g-NPs-DOX) and DPTL core (2g-NPs-DOX) were spherical and had average diameters of 185.88 ± 27.53 nm and 203.66 ± 20.69 nm, and zeta potential of −19.54 ± 0.57 mV and − 14.77 ± 1.16 mV, respectively. 2g-NPs-DOX had higher doxorubicin loading and encapsulation efficiency (14.59% ± 0.001; 87.54% ± 0.003) than those of 1g-NPs-DOX (12.88% ± 0.006; 77.29% ± 0.039). In vitro release studies showed that an initial burst release of doxorubici.....

877 hits

This article explains the development of checklist which is related with future of vocational learning skills by using the Delphi techniques. The Delphi technique provides the opportunity for researchers to gather input from participants without requiring them to work face-to-face. Often, the process is used to find consensus among experts who have different views and perspectives. The Delphi technique enables group problem-solving using an iterative process of problem definition, discussion, feedback, and revisions. This paper will discuss the basics of the Delphi techniques, its application potential, the selection of expert panels and the means on how consensus can be reached among the participants using examples of our past research using the technique. This article also provides Rasch analysis to find reliability in checklist. The value of realibility must achieve 0.71 – 0.99 in good fit. The 11 out of 13 domain of the future learning skills have found in this research...

458 hits

This study aims to investigate the potential use of biochemical seed oils of agro-waste as anti-trypanosomal, anti-oxidant, and anti-bacterial edible oil, sun-protection oil, and biodiesel. A comparative study was conducted to examine the chemical profile, physicochemical-sensory properties, and trans-esterification of seed oils collected from agro-waste in the Mualim district. Five drying techniques were tested before extracting the seed oils. Standard methods were then used to determine the chemical compounds, physicochemical-sensory properties, and bio-activity of the extracted seed oils. The analysis performed on such oils showed there were significant differences in the amount of seed oils between drying techniques, F (dfb, dfw) = 39.89, p = 0.00. Specifically, the analysis showed the microwave-drying technique produced the highest oil yield except for Carica papaya. L and Cucurbita sp, and the seed oils extracted from Mangifera indica had the best antioxidant property......

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One-pot synthetic method was adopted to prepare three isomers 4-(ortho-fluorophenyl)thiosemi- carbazide), 4-(meta-fluorophenyl)thiosemicarbazide and 4-(parafluorophenyl)thiosemicarbazide. The products were obtained in ethanolic solution from a reaction between ortho, meta and para derivatives of fluorophenyl isothiocyanate and hydrazine hydrate. This work presents the theoretical Molecular Electrostatic Potential (MEP) and Highest Occupied Molecular Orbital-Lowest Unoccupied Molecular Orbital (HOMO-LUMO) computational data through Gaussview 5.0.9 and Gaussian09 software. Experimental Cole-cole plot for conductivity determination was also illustrated. The present data is important to manipulate the properties of compounds according to the position of a fluorine atom..

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This research was designed to determine the relationship between corporate social responsibility (CSR) and financial performance and the moderating effect of informational transparency on the relationship. CSR in this study refers to reporting in economic, environment, and social dimensions. Stakeholder and legitimacy theories were used to explain the relationships. Data were collected from annual reports of 25 selected companies listed in Iraq Stock Exchange (ISX) from 2014 to 2017. Panel data regression techniques namely Fixed Effects estimation, Random Effects estimation and Pooled Ordinary Least Squares (OLS) regression were carried out.The results of this study showed that the level of CSR disclosures in Iraq are considerably low and the levels of financial performance measured as a Return on Equity (ROE) and Return on Assets (ROA)) showed mixed results (low and moderate). The level of informational transparencies showed an uptrend across indicators namely Ownership Str.....

1074 hits