Implementasi Embedded Web Server Via Modem Berbasiskan Mikrokontroler

In this paper there has been implemented a web server which store web pages on a microcontroller chip. To create a web server which connect to internet, TCP/IP protocol must be implemented as a software in the microcontroller system which use as web server. Protocols in TCP/IP which implemented are Serial Line Internet Protocol (SLIP), Internet Protocol (IP), Transmission Control Protocol (TCP), Internet Control Message Protocol (ICMP), and Hypertext Transfer Protocol (HTTP). Microcontroller connected physically to internet with use external V90 modem, so it is necessary to develop modem hardware interface and modem driver software. The benefit of this Embedded Web Server system compares with available systems on the market is that the TCP/IP protocol located inside the microcontroller as a software, so its realization can be cheaper and more compact, because it is not necessary to use TCP/IP chip to connect the microcontroller to internet

Profil Bibir Dan Posisi Insisivus Perawatan Kasus Borderline Klas I Dengan Pencabutan Dan Tanpa Pencabutan

Penentuan rencana perawatan ortodontik dengan pencabutan atau tanpa pencabutan masih menjadi perdebatan, terutama pada kasus borderline.Perawatan ortodontik dengan atau tanpa pencabutan dapat mempengaruhi profil wajah.Perubahan pada penampilan wajah terjadi akibat adanya Perubahan posisi gigi anterior yang dapat mempengaruhi Perubahan profil jaringan lunak wajah terutama pada daerah bibir. Penelitian ini bertujuan mengetahui perbandingan Perubahan profil bibir dan posisi gigi insisivus pada kasus borderline klas I antara perawatan dengan pencabutan 4 premolar kedua dan tanpa pencabutan. Penelitian dilakukan pada 28 sefalogram lateral kasus borderline klas I yang dirawat dengan teknik straight wire, terdiri dari 2 kelompok (13 kasus dengan pencabutan dan 15 kasus tanpa pencabutan). Masing-masing sefalogram dilakukan pengukuran profil bibir,yaitu jarak bibir atas dan bawah terhadapVertical Reference Plane (VRP) dan sudut interlabial; serta posisi gigi insisivus, yaitu jarak gigi insisivus atas dan bawah terhadap Vertical Reference Plane (VRP), sebelum dan sesudah perawatan. Hasil penelitian menunjukkan pada tahap awal perawatan kedua kelompok memiliki karakteristik profil bibir dan posisi gigi insisivus yang sama (p>0,05). Terdapat perbedaan bermakna (p0,05). There are significant differences (p<0.05) on lips position, interlabial angle, and incisors position changes between the extraction and non- extractiion cases after orthodontic treatment. From this study, it can be concluded that lips profile and incisors position in class I borderline cases treated with the extraction of second bicuspid are more retruded than that of non-extraction case

Aspherical supernova explosions and formation of compact black hole low-mass X-ray binaries

It has been suggested that black-hole low-mass X-ray binaries (BHLMXBs) with short orbital periods may have evolved from BH binaries with an intermediate-mass secondary, but the donor star seems to always have higher effective temperatures than measured in BHLMXBs (Justham, Rappaport & Podsiadlowski 2006). Here we suggest that the secondary star is originally an intermediate-mass (\sim 2-5 M_{\sun}) star, which loses a large fraction of its mass due to the ejecta impact during the aspherical SN explosion that produced the BH. The resulted secondary star could be of low-mass (\la 1 M_{\sun}). Magnetic braking would shrink the binary orbit, drive mass transfer between the donor and the BH, producing a compact BHLMXB.Comment: 4 pages, accepted for publication in MNRAS Letter

The Shape of an Accretion Disc in a Misaligned Black Hole Binary

We model the overall shape of an accretion disc in a semi-detached binary system in which mass is transfered on to a spinning black hole the spin axis of which is misaligned with the orbital rotation axis. We assume the disc is in a steady state. Its outer regions are subject to differential precession caused by tidal torques of the companion star. These tend to align the outer parts of the disc with the orbital plane. Its inner regions are subject to differential precession caused by the Lense-Thirring effect. These tend to align the inner parts of the disc with the spin of the black hole. We give full numerical solutions for the shape of the disc for some particular disc parameters. We then show how an analytic approximation to these solutions can be obtained for the case when the disc surface density varies as a power law with radius. These analytic solutions for the shape of the disc are reasonably accurate even for large misalignments and can be simply applied for general disc parameters. They are particularly useful when the numerical solutions would be slow.Comment: Accepted for publication in MNRA

Broken discs: warp propagation in accretion discs

We simulate the viscous evolution of an accretion disc around a spinning black hole. In general any such disc is misaligned, and warped by the Lense-Thirring effect. Unlike previous studies we use effective viscosities constrained to be consistent with the internal fluid dynamics of the disc. We find that nonlinear fluid effects, which reduce the effective viscosities in warped regions, can promote the breaking of the disc into two distinct planes. This occurs when the Shakura & Sunyaev dimensionless viscosity parameter alpha is ~ 45 degrees. The break can be a long-lived feature, propagating outwards in the disc on the usual alignment timescale, after which the disc is fully co- or counter-aligned with the hole. Such a break in the disc may be significant in systems where we know the inclination of the outer accretion disc to the line of sight, such as some X-ray binaries: the inner disc, and so any jets, may be noticeably misaligned with respect to the orbital plane.Comment: 8 pages, 9 figures. Accepted for publication in MNRA

Reaktivitas Osteoklas dalam Paradentium Tikus Anak dan Tikus Dewasa terhadap Pemberian Tekanan Mekanis

The alveolar bone remodeling is the basic of the orthodontic tooth movement. Resorption in the stress area and aposisition in the tension area. Osteoclast is the resorption cell. The difference of cAMP concentration between the young and adult individu may be influences the alveolar bone remodeling. The objective of this study was to investigate the osteoclast reactivity difference between young and adult in the rat periodontal membrane. Fourty five male Rattus 2 month of age and fourty five male rattus 7 month of age divided into 3 groups. Experimental Group, False group and control group. Mecanical tension inserted to the first right upper molar with close coil spring for about 50 gram. After one, seven and fourtheen days the animals were killed, the tooh and the supporting tissue removed for histological excaminations. The result of the study showed there is no significant difference between osteoclastic reactivity in the young and adult rat periodontal membrane at the first day. At the seven days, more osteoclast found in the young rat and at the fourteen days, more osteoclast in the adult rat than in the young. Key words : Reactivity, Osteoclast, Periodontal membrane, Young and adult rats, Mecanical tensio

Supernova Kicks and Misaligned Microquasars

The low-mass X-ray binary microquasar GRO J1655-40 is observed to have a misalignment between the jets and the binary orbital plane. Since the current black hole spin axis is likely to be parallel to the jets, this implies a misalignment between the spin axis of the black hole and the binary orbital plane. It is likely the black holes formed with an asymmetric supernova which caused the orbital axis to misalign with the spin of the stars. We ask whether the null hypothesis that the supernova explosion did not affect the spin axis of the black hole can be ruled out by what can be deduced about the properties of the explosion from the known system parameters. We find that this null hypothesis cannot be disproved but we find that the most likely requirements to form the system include a small natal black hole kick (of a few tens of km/s) and a relatively wide pre-supernova binary. In such cases the observed close binary system could have formed by tidal circularisation without a common envelope phase.Comment: Accepted for publication in MNRA