| Nama Pengarang | : | Achmad Ali, Yosef Badeoda, Tim Redaksi Jurnal Keadilan, T. Gayus Lumbuun, R. Muhammad Mihradi, Taufik Rahman, Syamsuddin, Amir, L. Michael Hager, Riris Ardhanariswari, Adji, Indriyanto Seno |
| Nama Majalah/Jurnal | : | Jurnal Keadilan |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 30-32 |
| Abstraksi Narasi | : | Give the fact that Indonesia is facing huge problems concerning corruption which demand urgest solution, the country need to deal with them in a manner of emergency. The implementation of shifting the burden of proof principle is thought of as an urgent way to cope with corruption problems (known as KKN in Indonesia). The priinciple of shifting the burden of proof is seemingly in opposition to the principle of presumption of innocence. The two principles are, as a matter of fact, juxtaposed. Shifting the burden of proof to a large extent is a strategic approach in handling corruption cases which in turn leaves the principle`s implementation to the hands clean, law-abiding, and professional law enforces. |
| Nama Pengarang | : | Sri Agustini Sulandari |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 34-43 |
| Abstraksi Narasi | : | Many of the properties of a single-mode fiber can be used to quickly generate various types of fiber sensors. The length and index refraction of this fiber will change when it is subjected to an environmental pertubation. Interferometric techniques may be used to sense these changes with accuracies that match or surpass those achieved with conventional sensors technology. Optical fibers are used to sense environmental effects in two distinct ways, i.e. extrinsic and intrinsic sensing. The fiber may be used strictly as information carriers that lead up to a black box to impress information on a light beam that propagates to a remote receiver through the same fiber. The second type of fiber sensor relies on the properties of the optical fiber itself to convert an environmental action into a modulation of the light beam passing through it. The typical single mode all-fiber interferometer is an intrinsically quiet device. Usually, most noise problems with these systems are due to pertubations of the fiber arms, causing unwanted phase shifts. This paper discusses the inferometric-based and phase modulation in optical fiber devices, the Mach-Zehnder and Michelson interferometric sensors, which have important applications, and finally thermal effects to the sensing fiber. |
| Nama Pengarang | : | Maria Dwi Budi Jumpowati |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 75-80 |
| Abstraksi Narasi | : | Natural pesticide is one of the alternatives that can be used as a substitute to synthetic pesticide. It has been widely known that synthetic pesticide causes damage to human health, environmental balance, and non-target organism. The objective of this paper is to classify various kinds of plants functioning as insecticide and repellent, and to show how to process them using simple methods. These methods of processing have been applied in rural areas which have cultivated sustainable farming. |
| Nama Pengarang | : | J. Eka Priyatma |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 16-26 |
| Abstraksi Narasi | : | Relational Algebra is a formal query language for retrieving information from relational databases in which each database contains only precise data. This paper presents a scenario on how to extend the Relational Algebra to one which is capable of dealing with databases containing incomplete or uncertain data. The scenario uses posibility theory to represent incomplete or uncertain data and to extend the Relational Algebra as well. |
| Nama Pengarang | : | l. Wilardjo |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 27-33 |
| Abstraksi Narasi | : | Derivation of the differential equation of electromagnetic wave from Maxwell's equations and the constitutive relations between the field vectors was given. This differential equation was then changed to the form appropriate for guided electromagnetic wave. Finally, the relations between the transverse and the longitudinal components of the fields in the guided electromagnetic wave were deduced using the general form of guided wave and the two "curl equations" in the Max-well's equations. |
| Nama Pengarang | : | PK Purwadi |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 1-15 |
| Abstraksi Narasi | : | This article discusses the solution to conduction heat transfer problem under steady state and two-dimensional conditions with no energy generation or no heat sources. A convenient equation used in this case is the two-dimensional Laplace equation, which is known as the Alternating Direction Implicit (ADI) method (with relaxation parameter w), which requires the smallest number of iterations and has a much faster convergence rate compared to the other methods, is consudered the best. |
| Nama Pengarang | : | Maria Agustiani |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 51-57 |
| Abstraksi Narasi | : | A matrix A with entries in a commutative ring R with unity is left good if, for every vextor x, the ideal < xA >generated by entries in the vector xA is the same as the ideal < X > generated by the entries in the vector x. In the context of matrices with integral entries, this is equivalent to requiring that the greatest common divisor of the entries, this is equivalent to requiring that the greatest common divisor of the entries in xA is the same as the greatest common divisor of the entries in x. Since, for any matrix A and vector x, it is obvious that < xA > ... < x >, the content of leftgoodness is in the reverse containment. |
| Nama Pengarang | : | Asan Damanik |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 44-50 |
| Abstraksi Narasi | : | According to Standard Model Particle Physics, neutrinos (....) with electron (...), muon (..), and tau (...) are classified as lepton family. Leptonic particles undergo weak interactions and short range. The electron, muon, and tau have non-zero mass and carry charges, but neutrinos have zero mass and are neutral. Therefore, it is very difficult to detect the presence of neutrinos in the laboratory. Massless neutrinos are relevant to the gauge invariance principle and symetry as a foundation of leptonic quantnm number conservation law. Many experiments performed since 1931 up to 1997 in measuring neutrino mass failed to observe neutrino oscillation, because oscillation is a direct consequence of particles having non-zero mass. But, in the International Physics Conference 'Neutrino 98' held in Takayama, Japan, the Super-Kamikande team claimed that they had observed neutrino oscillation while it was travelling in the medium. According to the Super-Kamiokande team, the heaviest neutrino probably has a mass of about 0.05 e V. If neutrino has non-zero mas, the leptonic quantum number conservation law will be violated and the Standard Model must be extended to accomodate neutrino mass. Another implication of neutrino having non-zero mass is the posibility of placing neutrino as the dark mass and the missing mass in cosmology and astrophysics. |
| Nama Pengarang | : | M.M. Yetty Tjandrawati |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 67-74 |
| Abstraksi Narasi | : | Corrosion of iron and aluminium in some liquid solutions has been studied from thermodynamic and electrochemical point of view. It was found that iron would be much corroded in acid rain. Corrosion of aluminium was impeded by Al2O3, but since chloride ion could penetrate Al2O3, aluminium could be corroded by oxygen and water. |
| Nama Pengarang | : | Yosef Wijoyo |
| Nama Majalah/Jurnal | : | Sigma Jurnal Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 81-87 |
| Abstraksi Narasi | : | In their life humans are usually in contact with other living organisms, such as microorganisms, bacteria, fungi, viruses, parasites, etc. Infection occurs when microorganism's invasion to the human body causes physiological disorders. The chemical substances used in infection eradication are antibiotics. The antibiotics found in commercial use are formulated in miscellaneous dosage forms, strength and quality and are markete in relatively high prices. Because of the product's diversity, antibiotic users deserve comprehensive product knowledge as guidance in using antibiotics in order to avoid the drug's misuse. This article discusses important information regarding antibiotics and the negative impact induced by antibiotic misuse. |
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