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Pada penelitian ini dirancang dan dipabrikasi antena mikrostrip dengan polarisasi melingkar yang dicatu secara electromagnetic coupling dengan pencatu proximity coupling untuk aplikasi Wireless Fidelity yang bekerja pada frekuensi 2,4 GHz. Untuk dapat menghasilkan polarisasi yang melingkar pada antena yang dirancang, maka dibuat tiga buah celah dan dengan tiga celah tersebut dapat menghasilkan patch antena berbentuk E. Saluran pencatu proximity coupling digunakan dengan tujuan untuk memperlebar bandwidth dari antena. Pada penelitian ini digunakan dua buah substrat, yaitu patch antena berbentuk E diletakkan di substrat bagian atas sedangkan saluran pencatu proximity coupling berada pada substrat bagian bawah. Adapun jenis substrat yang digunakan pada penelitian ini adalah FR4 Epoxy dengan nilai konstanta dielektrik relatip (r) = 4,4 dan ketebalan (h) = 1,6 mm. Dengan mengatur lebar dan panjang dari celah patch berbentuk E, maka dihasilkan polarisasi melingkar dengan hasil simulasi axial rasio 2,58 dB, nilai return loss -19,98 dB, VSWR 1,223 dan bandwidth 151,3 MHz. Sedangkan hasil pengukuran yang dilakukan menghasilkan nilai return loss sebesar -22,12 dB, VSWR 1,16 dengan bandwidth 153,2 MHz. Hasil pengukuran polaradiasi menghasilkan nilai Half Power Beamwidth sebesar 58o.

In this research, we produced a new design of microstrip antenna with truncated corner technique modified with slot in the middle patch of microstrip antenna to produce circular polarization for Long Term Evolution application. The value of return loss, VSWR and axial ratio of the antenna can enhanced by adjusting the length of the slot provided in the middle patch of microstrip antenna. Antenna designed using FR4 substrate with value (eή = 4.3, substrate thickness (h) of 1.6 mm and loss tangent (tan δ) of 0.0265. From the simulation results obtained return loss −45.45 dB, VSWR 1.014 and axial ratio 2.014 dB at a working frequency of 2300 MHz. The gain of the designed antenna is 6.93 dB. Slot method increased the axial ratio of the antenna until 26.17 % and array method increased gain until 26 %.

This paper proposes a new design of stacked rectangular ring slot microstrip antenna using parasitic load with slits and fed by coplanar waveguide. The measurement results shown return loss of −14,94 dB with VSWR 1,44 at frequency 2100 MHz for UMTS, at frequency 2300 MHz for LTE produce return loss −21,21 dB with VSWR 1,19 and return loss of −21,81 dB with VSWR 1,18 at frequency 2400 MHz for WiFi application.

This paper proposes a new design of compact fractal patch microstrip antenna fed by coplanar waveguide to reduce the antenna dimension and to increase its bandwidth for Long Term Evolution application purposes. The results shown return loss of −23.45 dB and VSWR 1.144 can be achieved by controlling the height and the width of the fractal patch dimension. Bandwidth of the proposed antenna is 375 MHz which is equal to an increase of 200% compared to the conventional rectangular patch antenna and also the dimension of fractal patch antenna can be reduced until 66%.

In this research, a 3 dB hybrid coupler has been developed for altimeter radio with operating frequency at 4,3 GHz using exponential tapered transmission line on its series arms, hence impedance characteristics become non-linear. Exponential taper has been selected due to shorter taper length compare with Triangular taper and Klopfenstein taper, for a lowest reflection coefficient.Keywords: 3 dB hybrid coupler, exponential tapered transmission lineDalam penelitian ini, telah dikembangkan suatu pengkopel hibrid 3 dB untuk radio altimeter yang bekerja pada frekuensi 4,3 GHz dengan menggunakan penyesuaian impedansi lengan seri dengan distribusi taper eksponensial, sehingga karakteristik impedansi yang diperoleh menjadi nonlinear. Pemilihan exponential taper disebabkan karena memiliki panjang taper yang lebih pendek dibandingkan dengan triangular taper dan Klopfenstein taper untuk koefisien pantulan yang terendah. Kata kunci: pengkopel hibrid 3 dB, exponential tapered transmission line

Salah satu syarat kenaikan pangkat pegawai pada Dinas Perhubungan KabupatenSorong yaitu dengan memasukkan berkas berkas pegawai. Dalam proses kenaikan pangkatpegawai harus nmemasukan berkas berupa berkas fisik seperti fotocopy kartu pegawai elektrikPNS, fotocopy surat keterangan atasan langsung, fotocopy surat kenaikan pangkat terakhir,fotocopy ijazah terakhir, fotocopy SK, fotocopy surat sasaran kinerja pegawai dan sebagainyayang dibutuhkan sesuai pangkatnya untuk memenuhi persyaratan kenaikan pangkat.Namunjika, proses pengajuan kenaikan pangkat masih berupa berkas fisik makapencarian,pengelolaan,dan penyimpanan akan terjadi penumpukan.Sehingga tujuan dari penelitian ini adalah untuk membuat sebuah sistem pengelolaanberkas pengajuan kenaikan pangkat pegawai pada Dinas Perhubungan Kabupaten Sorongberbasis web, agar memudahkan pegawai memasukan berkas persyaratan tanpa berupa berkasfisik,dan bisa diakses dimana saja dan kapan saja melalui website.

The purpose of this study was to obtain a chemical practicum KIT as an effective learning medium to train students' science process skills in scientific method, polar and non-polar covalent compounds, electrolyte and non-electrolyte solutions. This study uses a 4-D research model which includes the stages of defining, designing, developing, and distributing. However, in this study only limited to the development stage. The results of the research obtained showed that classical completeness in the posttest workmanship on all three materials was 100%. While the increase in learning outcomes aspects of science process knowledge and skills in the three materials are in the category of "medium" and "high". Based on the results, it can be concluded that the practicum KIT learning media is effective for training science process skills in scientific method, polar and non-polar covalent compounds, electrolyte and non-electrolyte solutions.

Ekowisata kini tumbuh menjadi suatu tren yang menarik di Indonesia, terutama di wilayah pedesaan dimana alam menjadi salah satu sumber penghidupan bagi masyaraktnya. Bahkan desa terkaya di Indonesia saat ini memiliki perputaran ekonomi yang sangat tinggi dikarenakan baiknya manajemen ekowisata oleh segenap masyarakatnya. Satu dekade yang lalu terjadi bencana luapan lumpur panas di Sidoarjo, namun kini luapan lumpur yang di alirkan melalui Sungai Porong tersebut telah mengendap sehingga membentuk suatu pulau baru yang mempunyai keunikan dan daya tarik wisata tersendiri. Pulau tersebut bernama Pulau Lusi yang merupakan akronim dari Lumpur Sidoarjo. Pulau Lusi berkembang menjadi pulau dengan ekowisata bahari mangrove. Pengabdian ini bertujuan untuk meningkatkan kapasitas sumberdaya manusia tepatnya di Dusun Tlocor, Kecamatan Jabon, Kabupaten Sidoarjo. Peserta kegiatan ini antara lain PKK, POKDARWIS dan Karang Taruna. Kegiatan yang dilakukan adalah sosialisasi tentang strategi pengembangan desa ekowisata berbasis masyarakat dan pelatihan pembuatan souvenir. Kegiatan ini mendapat sambutan yang sangat yang ditunjukan dari aktifnya peserta kegiatan. Selain itu keberhasilan dapat dikukur dari produk souvenir yang dihasilkan dengan cukup banyak dan siap untuk dipasarkan kepada para pelancong.DOI: http://dx.doi.org/10.17977/um032v2i12019p028

Sistem monitoring adalah hal yang sangat penting dan harus dimiliki oleh setiap pemilik rumah. Sehingga diperlukan alat untuk dapat mengawasi rumah secara real-time. Perancangan sistem menggunakan Raspberry-Pi sebagai pusat komputasi dan menggunakan smartphone berbasis android untuk melakukan monitoring. Sistem ini dilengkapi dengan beberapa fitur diantaranya pergerakan kamera secara horisontal dan vertikal menggunakan motor servo, sistem recording video yang dapat dikendalikan oleh user, serta sistem deteksi gerakan yang dapat menjadi alert untuk pengguna. Pengujian sistem dilakukan dengan cara melakukan pengujian network dilihat dari parameter bandwidth dan jumlah client dalam suatu jaringan untuk mendapatkan suatu sistem monitoring yang real-time, reliable dan smart. Dalam hasil pengujian dengan maksimum 2 klien dalam 1 network, sistem dapat menangkap rata-rata 10.7 frames per second, serta memiliki respon pergerakan kamera < 1 second. Pengujian fitur perekaman dan motion detection juga berfungsi dengan baik, sehingga sistem monitoring ini menjadi sistem yang smart dan reliable. Kata kunci: Real-time, Rasberry-Pi, Smart Monitoring. ABSTRACT The monitoring system is very important and must be owned by every homeowner. Therefore, it needed some tools to be self-sufficient in real-time. The design of the system using Raspberry-Pi as a computing center and use an Android smartphone to perform monitoring. Equipped with a servo motor, a user-controlled video recording system, and a motion detection system that can generate alert to the user. Testing is done by doing network testing seen from the bandwidth parameters and number of clients in a network for a real-time, reliable and smart monitoring system. In the test results with maximum 2 clients in a network, the system can capture an average of 10.7 frames per second and has a camera movement response of

Setiap peralatan yang bergerak selalu mengalami kerusakan. Hal ini dikarenakan adanya dua benda yang saling berkontak atau bergesekan. Masalah utama yang dialami oleh dunia industri selama ini adalah bagaimana cara mengurangi atau mencegah kerugian energi akibat adanya gesekan. Gesekan biasanya didefinisikan sebagai gaya lawan (opposing force) yang terjadi bilamana dua permukaan saling bergerak relatif antara satu dengan yang lainnya. Gesekan yang terjadi ini bisa menimbulkan rusak atau hilangnya partikel dari suatu material yang dinamakan dengan keausan

Wireless Fidelity (Wi-Fi) is a wireless telecommunications technology developed by IEEE 802.11. Wi-Fi has a goal so that users can access the Internet anywhere. According to the IEEE standard for Wi-Fi, the network works at 2.4 GHz –2.484 GHz. This paper describes design and implementation of microstrip antenna on the wireless LAN card. All components of the antenna are placed on FR4 (e r =4.3) substrate with the overall dimension of 57 mm × 29.5 mm × 1.66 mm. The obtained results show that the proposed rectangular microstrip antenna achieves a good performed at outdoor and can be used as a client antenna with compact size. Also, a comparative study against a commercial antenna is described, and the proposed antenna shows better result than commercial antenna.

The revised 2013 curriculum requires skill assessment by involving students' characters. In giving an assessment, a teacher performs one unit that cannot be separated from one another between the assessment of skills and the assessment of character in students. With the demands in assessing the 2013 revised Curriculum, the purpose of community service activities is to assist teachers in making character-based skills assessments. The method used in this activity is training and mentoring, with partner schools is Pontianak 11 State Junior High School. There were 32 participants in the training and mentoring activities, while 20 people filled out the response questionnaire. The results of the training showed that the participants involved were very enthusiastic, and followed the activities to completion. Based on the questionnaire given, overall it was found that the mastery of the teacher on character-based skills assessment was 85.75% with good categories. In detail, the character aspects of the 2013 curriculum are 91.75%, and the skills assessment is 79.75% the teacher states that they master well.

Smartphone has an important role in the world of information. This is because some smartphone already have more functions and capabilities beyond basic capabilities. The most popular smartphone today is A smartphone with Android-based information systems. Utilization of smartphone as A companion in carrying out daily activities is very often used is fundamental in the making recognitions Application Of Handicrafts Dayak's People in Central Borneo Province Based on Android. The problem of this research is how to design and create recognitions Application Of Handicrafts Dayak's People in Central Borneo Province Based on Android that can help users to provide ease in the knowledge of handicrafts from Central borneo. So it can be know later by the public, not only the locals people but people outside the region. The method used in this research include observation, interviews, literature and documentation. Software development method that used for creation flow system using methods developed software system development life cycle ( SDLC ) with the waterfall model development approach. Software used in the manufacture of recognitions Application Of Handicrafts Dayak's People in Central Borneo Province is A version of the Eclipse ADT Mars.2.

This paper proposed a new design of log periodic microstrip antenna using peripheral slits for dgital video broadcasting applications in DKI Jakarta. Applying peripheral slits can be reduced the dimension of antenna up to 62.6% with its dimension 400 mm x 150 mm using 4 patches in different frequencies. The patches are one another connected using log periodic technique. The measurement results showed that the antenna was operating at frequency ranges of 450 MHz to800 MHz with impedance bandwidth of 350 MHz, VSWR ≤ 2 and return loss ≤ -10dB. The proposed antenna could receive 11 DVB stations with high definition quality pictureand only channel number 24, such as RCTI, Global TV and MNC TV can not reveive signals as expected.

T h is research aims to describe MIPA teachers ’ ability to design knowledge assessment through the analysis of achievement aspects of knowledge assessment. This research use d a descriptive method with SMP MIPA teachers in Pontianak City who ha ve taught for more than 5 years and have an undergraduate degree as the population . The sampl es in this research, selected using a purposive sampling technique, consisted of 12 teacher s who submitted MIPA test items . The research instrument used the data of the test item document designed by the teachers in the form of a multiple-choice test. The d ata were analyzed descriptively which include d data reduction, systematic data display , and conclusion. The results showed that of the 12 test instruments made by with 380 questions in total, the teachers ’ ability to design knowledge assessment (M ultiple C hoice Q uestion s) obtained 17.37% of knowledge aspect, 67.90% of understanding aspect, 8.68% of implementation aspect, and 6 . 05% of analysis aspect. There were no questions made related to evaluation and creation aspects . Keywords: teachers ability, designing knowledge assessment.

A novel design for ultra wideband microstrip antenna using T-shape stub fed by coplanar waveguide is proposed and experimentally studied. The multiband frequencies can be reached by controlling the length of a and b of the T shaped stub. The results shown that the proposed antenna can be achieved multiband frequencies with return loss -21.5 dB at frequency 2.65GHz, return loss -24.5dB at frequency 5GHz, and return loss -35dB at frequency 8.42GHz. Impedance bandwidth of the proposed antenna is 6570 MHz or about 200% (VSWR

This paper presents a novel wideband nonuniform branch line coupler. An exponential impedance taper is inserted, at the series arms of the branch line coupler, to enhance the bandwidth. The behavior of the nonuniform coupler was mathematically analyzed, and its design of scattering matrix was derived. For a return loss better than 10 dB, it achieved 61.1% bandwidth centered at 9 GHz. Measured coupling magnitudes and phase exhibit good dispersive characteristic. For the 1 dB magnitude difference and phase error within 3 ∘ , it achieved 22.2% bandwidth centered at 9 GHz. Furthermore, the novel branch line coupler was implemented for a wideband crossover. Crossover was constructed by cascading two wideband nonuniform branch line couplers. These components were employed to design a wideband Butler Matrix working at 9.4 GHz. The measurement results show that the reflection coefficient between the output ports is better than 18 dB across 8.0 GHz–9.6 GHz, and the overall phase error is less than 7 ∘ .

Long Term Evolution (LTE) is a standard for wireless communication of high-speed data for mobile phones and data terminals. Due to the LTE standard covers a range of many different bands in each country, therefore an antenna with more than one frequency bands become one of the most important needs in LTE antenna. In this paper, a novel triangular dual band MIMO (2x2) antenna with coplanar waveguide (CPW) fed is proposed to be used for LTE application. The proposed MIMO antenna is able to work in dual frequency that will be implemented in Indonesia at 1.8GHz and 2.35GHz. To obtain the optimum design, the characteristic of proposed antenna are numerically investigated through the physical parameters of antenna. The results show that proposed antenna has a compact size and a bandwidth of 100 MHz which is suitable for LTE application

Kegiatan ini bertujuan untuk membuat asesmen berbasis kelas melalui model pelatihan partisipatif dan dapat meningkatkan profesionalitas guru MIPA SMP di Kota Pontianak. Metode yang digunakan adalah pelatihan dengan model partisipatif. Peserta yang terlibat berjumlah 36 orang guru, yang terdiri dari: 30 orang dari SMP Negeri, 4 orang dari SMP Swasta, dan 2 orang dari MTs. Negeri. Membuat asesmen berbasis kelas sesungguhnya telah dilakukan guru-guru MIPA SMP yang ada di Kota Pontianak. namun masih belum mengungkap aspek kemampuan yang ingin diukur pada kisi-kisi yang dibuat. sehingga akan mempengaruhi rumusan indikator soal yang dirumuskan. Setelah melakukan kegiatan pelatihan dengan menggunakan model partisipatif diperoleh 80,56% dapat dikategorikan cukup baik dalam membuat asesmen berbasis kelas, sedangkan hanya 19,44% dalam kategori cukup. Dalam menerapkan model pelatihan partisipatif pada pelaksanaan kegiatan ini. pelatih menggunakan metode diskusi, tanya jawab, dan presentasi. Melalui tiga komponen pelatihan partisipatif yaitu pengetahuan, keterampilan, dan pengembangan dapat meningkatkan kinerja guru dalam proses pembelajaran.