161 research outputs found
Heme polymerization inhibition activity (HPIA) assay of synthesized xanthone derivative as antimalarial compound
No full textPERENCANAAN ULANG STRUKTUR GEDUNG FAKULTAS ILMU KOMPUTER UNIVERSITAS BRAWIJAYA DENGAN BAJA KOMPOSIT MENGGUNAKAN SISTEM PENAHAN GEMPA BRACING (STUDI PERENCANAAN : STRUKTUR BAWAH)
No full textThe Faculty of Computer Science Building of Universitas Brawijaya is a lecture building that has a location on Jl. Veteran Malang, Ketawanggede, Lowokwaru District, Malang City, and has a building area of 466.56 m2. In accordance with its function, the Faculty of Computer Science Building functions as a place to support the learning process for students of Universitas Brawijaya, especially students of the Faculty of Computer Science. The building, which has a square shape along 21.6 m and a total of 7 floors with a height of 4.5 m for each floor, is re-planned with a composite steel structure and a bracing earthquake resisting system. To support the upper structure of the Faculty of Computer Science building, a pile foundation is planned. Based on analysis using ETABS software, the largest axial load occurs in column 2-B, which is 498.46 tons. In the planning of piles taken is a pile drill with a diameter of 0.8 m and 0.6 m, and for the determination of the foundation point adjusted to the data on the Drill Log which has 3 points namely BH-1, BH-2, and BH-3 resulting in a foundation depth of 12 m and 9 m. The planned pile cap has 2 types, including pile cap 1 which has dimensions of 2.70 m x 2.70 m x 0.80 m and pile cap 2 which has dimensions of 3.60 m x 3.60 x 0.80 m, while for longitudinal reinforcement in the x and y direction pile cap used D22 - 100 mm reinforcement, shrinkage reinforcement used is D16 - 150 mm, and shear reinforcement is used D10 - 100 mm. The largest decrease that occurred in this building was in column 2-B which amounted to 5.84
Perancangan Treatment System Untuk Ikan Kerapu Hidup Pada Kapal Angkut Ikan Hidup 300 Gt
No full textSumber daya perikanan merupakan salah satu kekayaan Indonesia
yang memiliki potensi besar bagi pembangunan nasional terutama
dalam bidang kelautan dan perikanan. Sehingga permintaan
ekspor dari tahun ke tahun semakin meningkat, contohnya adalah
ekspor ikan kerapu dalam keadaan hidup. Namun hal ini tidak
diimbangi dengan fasilitas alat transportasi yang memadai yang
mampu menjaga kualitas ikan dengan baik. Penelitian ini
bertujuan merancang kapal angkut ikan hidup 300 GT secara
tertutup dengan dilengkapi sistem treatment yang memadai yaitu
sistem treatment O2 dan CO2, sistem desinfeksi dan sistem
treatment zat amonia (NH3). Perancangan dilakukan berdasarkan
metode studi literatur dan komparasi menggunakan acuan kapal
pembanding. Hasil dari penelitian ini adalah desain sistem
treatment untuk 6 palka kapal ikan hidup 300 GT yang dilengkapi
dengan sensor NH3, dissolved oxygen (O2), pH dan penggunaan
sistem aerasi yang dilengkapi dengan 2 kompresor (162 m3
/h) dan
4 buah O2 generator (33,93 m3
/h) untuk sistem treatment O2 dan
CO2. Untuk sistem desinfeksi dilengkapi dengan tangki ozone, 2
ozone generator (20 g/hr) dan tangki aerasi. Untuk sistem
treatment NH3 dilengkapi dengan tangki nitritasi dan nitrasi
dengan penambahan bakteri aerob dan oksigen dan tangki
denitrifikasi dengan penambahan bakteri anaerob. Keyplan danlayout sistem treatment yang telah dibuat dengan bantuan
perangkat lunak AutoCAD menunjukkan gambaran alur sistem
treatment dan peletakan peralatan yang dibutuhkan mulai dari
penyuplaian oksigen melalui O2 generator yang diletakkan di
space ruang palka dan kompresor yang diletakan di platform
kamar mesin. Sistem treatment air untuk penghilangan zat amonia
dengan melalui 3 tahapan dilengkapi dengan tangki-tangki serta
proses pembunuhan bakteri dengan proses ozonasi, semua
peralatannya diletakkan di ruang treatmenrt. Penambahan ruang
treatment dilakukan karena untuk mempermudah dalam peletakan
peralatan yang disesuaikan dengan kebutuhan dan lebih dekat
dengan palka. Sehingga dengan adanya sistem treatment air
secara lengkap maka dapat mengurangi kematian ikan selama
pengangkutan dan mampu menjaga ikan tetap dalam keadaan
fresh dan hidup
============================================================================================Fisheries resource is one of Indonesia's wealth that has great
potential for national development, especially in the maritime
and fisheries affairs. So, the export demand from year to year is
increase, for example is export of live groupers. However this is
not balanced with the adequate transportation facilities are
capable maintain the quality of the fish properly. Purpose of this
research has designed live fish carrier 300 GT in closed system
has completed with treatment systems were O2 and CO2 treatment
systems, disinfection systems and ammonia (NH3) substances
treatment systems. This design was based on study of literature
methods and comparative of used the reference of comparison
ship. Result of this research was design of treatment system for
six fish tank live fish carrier 300 GT were completed with
ammonia (NH3) sensor, dissolved oxygen sensor, pH sensor and
used aeration systems were completed with two compressor (162
m
3
/h) and 4 O2 generator (33,93 m
3
/h) for O2 and CO2 treatment
systems. Disinfection systems was completed with ozone tank, 2
ozone generator (20 g/hr) and aeration tank. Ammonia (NH3)
treatment was completed with nitritasi tank and nitration tank by
addition of aerobic bacteria and oxygen and denitrification tank
with the addition of anaerobic bacteria. Keyplan and layout of
treatment system that have been created with the help ofAutoCAD software showed view of treatment system flow and
laying the necessari equipment start from oxygen supply through
O2 generator was placed in fish tank space and compressors
were placed in engine room platform. Water treatment system for
removal of substances ammonia through three steps were
equipped with tanks and the process of killed bacteria with
disinfection system used ozonation process, all of it equipments
was placed in the treatment room. Extra treatment room was
carried out to facilitate layed of equipments appropriated to
needs and near to fish tank. So with the water treatment system is
complete, it can reduce the death of groupers during carriage
and capable maintain the quality of the fish always in state of
fresh, live and properly
Enhanced Secure Sharing of PHRs in Cloud Using Attribute-Based Encryption and Signature with Keyword Search
No full textThe implementation of case study with module-assisted to improve students’ understanding on phytochemistry course
No full textEnhanced secure sharing of PHR’s in cloud using user usage based attribute based encryption and signature with keyword search
No full textRektor UMS Menyapa Mahasiswa Mobility Program UMS Dari Berbagai Negara Kontributor: Atta Hubungan Masyarakat Perpustakaan Universitas Muhammadiyah Surakarta
No full textProf. Dr. Sofyan Anif, M. Si. as Chancellor of the University of Muhammadiyah Surakarta greeted students who took part in the mobility program in three countries on Thursday(09/12/21) through virtual media, namely Zoom Meeting. Details of the departure of a number of
students by place of study: including South Korea at Yongsan University, Dong A University, and Dong Eui University as well as universities in Taiwan. In addition to the 4th Catur Dharma, namely Al Islam and Kemuhammadiyahan (AIK), the University of Muhammadiyah Surakarta also realized Student Mobility activities for the needs of international level programs. In addition, the Chancellor of UMS received input from various students, one of which was Dhina Pratiwi (Double Degree Student at the Department of Broadcasting and Photography at Yongsan University) to open a Korean language class program for international needs
Extraction of certain radionuc1ides by bipicolinamides as new extractants from nitric acid medium
No full text3012-3016Two new symmetrical bipicolinamides (pyridine2,6-dicarboxamide),
viz., N, N'-tetrahexyl bipicolinamide (THBPA) and N, N'-tetra-(2-ethylhexyl)
bipicolinamide (TEHBPA) have been synthesized and characterized. The extracting
ability of these extractants for U(VI), Th(IV) and Fe(III) and some selected fission
products such as Cs, Sr(II), Co(II) and Eu(III) from nitric acid solutions have
been compared with that of the two parallel structure monoamides(pyridine-4-carboxamide),
viz., N,N'-dihexyl isonicotainamide (DHINA) and N,N'-di-(2-ethylhexyl)-isonicotainamide
(DEHINA). TEHBPA shows higher extraction efficiency for U(VI), Th(VI) and Fe(III)
than THBPA. A systematic investigation has been carried out on the extraction behavior
of U(VI) with the two newly prepared bipicolinamides. The stoichiometry of the extracted
species of U(VI) conforms to UO2(NO3)2.2(bipicolinamides).
The extraction behavior of U(VI), Th(IV) and Fe(III) with gamma-irradiated bipicolinamides
and monoamides has been studied as a function of absorbed doses
Impregnated Bits Design and Optimization: An Iterative Method for Improving Drilling Performances. Case Study: Hassi Messaoud Cambrian Reservoir in Algeria
No full textAbstract
Horizontal wells are drilled in Hassi Messaoud oilfield with 6" drains of +/−800m into the Cambrian reservoir using both PDM and Turbine. The multi layered reservoir is +/-3400m deep, mainly quartzite, sandstone and silt. Looking at the rock strength, the confined compressive strength can reach 60 kpsi. Therefore enhancing ROP and durability, when drilling the very hard and very abrasive Cambrian reservoir in Hassi Messaoud, remains one of the major drilling challenges.
This paper describes the iterative approach by which SONATRACH and NOV Downhole Tools Algeria are developing and improving impregnated bits for the very hard and very abrasive formations; for both applications: PDM and Turbine as well. The main objectives are to:
Enhance ROP. Increase durability. Maintain inclination and reasonable dogleg severity. Be able to drill out float equipments and shoe. Fit for both PDM and Turbine application Suit both OBD and UBD application
As all new bit types, a complete field study was carried out, including logs and rock strength analysis, offset wells comparison in order to bring into the light the first version of the design. Four versions of the impregnated bit were tested, so far.
The first version drilled 120m. A second version was tested, with an improvement related to the anti-coring cutters, replacing them by a new generation more wear resistant. The subsequent improvement consisted in increasing blade volume, enabling one of the best ROP achieved in Hassi Messaoud 5.27 m/h. To improve durability, blade volume was increased more. The bit achieved 365 m in one run, with an average ROP of 3.49 m/h.
In the last version developed and tested, an increase in the grit mix was made. The bit drilled an interval of 399 m with an average ROP of 3.89 m/h.
Furthermore, several design considerations have been taken into consideration in order to improve impregnated bits in relation to different types of lithology drilled. The newest design has the same blade volume and the same grit mix as the last bit design recently used in Hassi Messaoud field. However the blades are thicker and the hydraulics / water ways are optimized.</jats:p
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