Wideband P-Shaped Dielectric Resonator Antenna

A novel P-shaped dielectric resonator antenna (DRA) is presented and investigated for wideband wireless application. By using P-shaped resonator, a wideband impedance bandwidth of 80% from 3.5 to 8.2 GHz is achieved. The antenna covers all of wireless systems like C-band, 5.2, 5.5 & 5.8 GHz-WLAN & WiMax. The proposed antenna has a low profile and the thickness of the resonator is only 5.12 mm, which is 0.06-0.14 free space wavelength. A parametric study is presented. The proposed DRA is built and the characteristics of the antenna are measured. Very good agreement between numerical and measured results is obtained

A wideband trapezoidal dielectric resonator antenna with circular polarization

A new design of a circularly-polarized (CP) trapezoidal dielectric resonator antenna (DRA) for wideband wireless application is presented. A single-layered feed is used to excite the trapezoidal shaped dielectric resonator to increase resonant frequency and axial ratio. Besides its structure simplicity, ease of fabrication and low-cost, the proposed antenna features good measured impedance bandwidth, 87.3% at 4.21 GHz to 10.72 GHz frequency bands. Moreover, the antenna also produces 3-dB axial ratio bandwidth of about 710 MHz from 5.17 GHz to 5.88 GHz. The overall size of DRA is 21 mm × 35 mm, which is suitable for mobile devices. Parametric study and measurement results are presented and discussed. Very good agreement is demonstrated between simulated and measured results

The Role of Differentially Expressed miRNAs and Potential miRNA-mRNA Regulatory Network in Prostate Cancer Progression and Metastasis

Purpose: Aberrant expression of microRNAs (miRNAs) has been discovered in prostate cancer progression however their function is not well understood, thereby further investigation is required to understand the importance of underlying mechanisms and their involvement in multiple signaling pathways, as well as their potential as therapeutic targets. In this study the role and expression levels of three miRNAs were evaluated: miR-21, miR-221 and miR-200c in different prostate cancer cell lines. In addition, based on the latest studies on miRNAs function, their association with other target genes and molecules were analyzed using bioinformatic tools. Methods: Three PCa cell lines PC3, LNCaP and VCaP and normal prostate epithelial cell line PNT1A were screened for miRNA expression levels using qPCR. miRNA target genes and their association with signaling pathways were analyzed through several Network and pathway analysis online tools. Findings: Upregulation of miR-21 and miR-221 was observed in PC3 and VCaP prostate cancer cells, respectively. According to KEGG analysis, we found that Hippo signaling pathway and cytokine-cytokine receptor interactions were affected by miR-21 while miR-221 would interfere with ECM-receptor interaction, Fatty acid elongation and Huntington disease molecular networks. Exposure of PC3 cells to TGF-β (10 µM) caused upregulation of miR-21 with the evidence with increased invasion potential. Discussion and Conclusion: miRNAs could regulate several genes in multiple signaling pathways. Here, we demonstrated that in a panel of PCa cell lines, both mir-21 and miR-221 expressions were upregulated. miR-21 may be a dignostic and prognosticbiomarker for PCa

Sensor material characterisation for magnetometer application

Pengukuran dan gangguan medan magnet arus terus dan arus ulang-alik memerlukan penderia medan magnet yang mempunyai kepekaan yang tinggi dan stabil. Untuk menghasilkan penderia tersebut, ciri-ciri bahan magnet yang baik telah dikenalpasti. Beberapa jenis bahan magnet yang berbeza telah digunakan untuk mengkaji ciri-ciri dan kesannya terhadap medan magnet. Teras gelang yang diperbuat daripada bahan-bahan magnet tersebut direkabentuk dengan dimensi yang sama bagi membolehkan perbandingan dibuat dengan mudah. Selain itu, rod tunggal dan berkembar juga telah digunakan sebagai teras penderia fluxgate, untuk melihat prestasi setiap jenis penderia tersebut. Kedua-dua penderia tersebut telah diuji dengan menggunakan dua sumber bahan magnet iaitu bar magnet tetap dan solenoid dengan diameter dawai yang berbeza. Isyarat keluaran bagi setiap penderia fluxgate seterusnya diproses bagi mengenalpasti hubungannya dengan ketumpatan medan magnet

A supplier selection strategy within the Malaysian telecommunications industry

The telecommunication industry in Malaysia has grown rapidly over the last 15 years, with effective supply chain management becoming increasing important within the sector. A multitude of providers and part owned Malaysian government companies, vendors and suppliers are involved in generating and creating value-adding products and services within this sector (across wireless, wireline, broadband business and consumer lines of business). This paper describes key challenges facing a major telecoms service provider in Malaysia with regards to drivers involved in the overall procurement and supplier selection with regards to components of performance management, decision-making, selection techniques, quality and cost management, procurement policy and procurement ethics. This paper further focuses on defining and detailing research currently being undertaken to develop a framework for identifying supplier selection drivers that are inherent within the sector and suggests a research approach to investigate and develop strategies for supplier selection for the telecommunications industry in Malaysia

Komunitas Perilaku Lingkungan Perempuan Polahi Di Kawasan Hutan Lokasi Desa Bihe Kecamatan Asparaga Kabupaten Gorontalo

Polahi community is Gorontalo community that already alienated by choosing to settle and live in the forest area as a result of Dutch colonization in Gorontalo. Women's community uses the forest area as a place to live and melansungkan life. All activities ranging from eating, drinking, activity and even to proliferate (childbirth) is done in the area of Life hutan. Konsep social, religious, societal, not considered because there are no rules and policies that need to be noticed. The purpose of writing is to seek an understanding of women's lives polahi that in the review of the concept of the social environment and the environment agama.Metode writing using the survey with descriptive approach to explain the behavior of the community polahi environment. Results of this study describes the behavior polahi community of women who do not conform to the norms of social and religious life for normal people. Using the law of the jungle to live, whom he is leading powerful, married with blood ties, does not recognize the religious life, untouched by the world of education, permpuan must work to maintain life and not depend on the female partner also can do the work of men like hunting and clearing forest areas are alternated and are closed and do not accept people from outside the forest area

Peningkatan Kemampuan Menggunakan Huruf Kapital Siswa Kelas V SD Inpres 2 Mepanga Melalui Metode Pemberian Tugas

Penelitian ini berjudul Peningkatan Kemampuan Menggunakan Huruf Kapital Siswa Kelas V SD Inpres II Mepanga Melalui Metode Pemberian Tugas. Permasalahan yang ditemukan yaitu kurangnya kemampuan belajar siswa khususnya materi penggunaan huruf kapital. Tujuan dari penelitian ini yaitu untuk meningkatan kemapuan siswa dalam menggunakan huruf kapital melalui metode pemberian tugas. Penelitian ini merupakan jenis penelitian tindakan kelas (PTK), yang dilaksanakan 2 siklus yang terdiri atas perencanaan, pelaksanaan tindakan, observasi dan refleksi. Data yang diambil adalah data kualitatif yaitu data hasil observasi diperoleh dari hasil pengamatan situasi pembelajaran. Serta data kuantitatif yaitu data hasil belajar diperoleh dari hasil tes. Hasil penelitian siklus I diperoleh tuntas individu 11orang dan tidak tuntas individu 7 orang dengan persentase daya serap klasikal 71,44% dan ketuntasan belajar klasikal 61,11%. Hasil belajar siklus II seluruh siswa dinyatakan tuntas yaitu 100% dengan persentase daya serap klasikal 87,05%. Dengan demikian dapat dikatakan bahwa penggunaan metode pemberian tugas dapat meningkatkan kemampuan siswa dalam menggunakan huruf kapital siswa kelas II SD Inpres II Mepangan

Bow-Tie Microstrip Antenna Design

In this paper, the bow-tie microstrip antennas have been designed with two different angles of 40° and 80°. An investigaton on the effect of the angle to the return loss and radiation patterns had been carried out. The impedance matching network with the niicrostrip transmission line feeding was used in this study. Simulation and measurement results for the return loss and radiation patterns were presented

Multiband monopole antenna for mobile applications

— In this paper, a multiband monopole antenna has been proposed for mobile applications. The monopole antenna has simple structure with a physical size of 15 cm × 7 cm. The antenna consists of monopole shape loaded by a set of folded arms with a varying length which lead to a better impedance matching result and multiband performance. The simulated results show that the proposed antenna provide multiband frequency operation of 0.8 GHz, 1.8 GHz 2.1 GHz, 2.6 GHz and 3.5 GHz which covers the range from 0 to 4 GHz. The antenna is designed to operate at sub-6 GHz which proposed as lower frequency band to deliver 5G in early stage. The designed antenna has been fabricated and measured to validate the simulated results. RF Coaxial U.FL Connector was used as the port connector. The measurement results agrees well with the simulated ones for all frequency bands

Agroforestry trends in Punjab, Pakistan

Pakistan in general and the province of Punjab in particular have a narrow forest resource. More than 90% of the fuel wood and about 72% of timber requirements are being met from trees growing on the private farm lands, based on agro forestry / social forestry / community forestry as compared with the state forests. It is obvious that trees have to be grown in conjunction with agricultural crops on private farm lands. The main objectives of the study pertain to agro forestry trend in Punjab, Province of Pakistan along with the identification of the agroeclogical zones of the province including evaluation of adaptation level of agro forestry interventions; assessment of the aptitude of agro-foresters towards tree planting and hurdles in expansion of the agro forestry. For this, a survey of 257 farm plantations (FP) was conducted in 20 districts of the Punjab Province and more than 257 agro-farmers were interviewed through a prescribed performa. However, a correlation between linear and compact designs of the agro forestry was established. From the study of the survey results, it has also been noticed that out of 257 FP, only three FP belonged to the lessees and 254 belonged to land owners. It was also noted that number of FP considerably increased during 1995 to 2000, when the Punjab forest department transferred technology and provided various incentives and financial subsidies. The farmers can further increase it, if the government revives financial/technical incentives and marketing facilities.Key words: Agro forestry, linear and compact design, land tenure, agroeclogical zones, spacing