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"Kami mempelajari kontribusi dari masing-masing kanal pertukaran dari fotoproduksi K*(892) yang didasarkan oleh model efektif Lagrangian. Selain itu, kami juga mempertimbangkan penambahan kontribusi dari partikel Σ*(1780) sebagai partikel resonans hiperon tambahan disamping dengan partikel Σ*(1385) yang sudah mapan, untuk menunjukkan efek dari kontribusi tambahan pada daerah backward scattering yang menyebabkan deviasi diantara model yang diajukan dengan data eksperimen prilem yang dihasilkan oleh kolaborasi CLAS, sebagai petunjuk bahwa ada kontribusi nontrivial pada kanal pertukaran u. Penelitian ini dapat bermanfaat kedepannya untuk membangun pemahaman yang lebih dalam dari mekanisme fotoproduksi K*.......We study the contributions of each exchange channels of the K*(892) photoproduction based on the effective Lagrangian model. In addition, we consider the contribution of the Σ*(1780) as an additional hyperon resonance alongside the Σ*(1385), to demonstrate the effect of additional contributions in the backward scattering region that caused a discrepancy between the original model with the preliminary experiment data produced by the CLAS collaborations, hinting a possible non-trivial contributions to the u-channel. These study could be advantageous to establish a deeper background on the mechanism of the K* photoproduction."

"Fotoproduksi meson-η′ pada nukleon telah dipelajari menggunakan model isobar dengan pendekatan Lagrangian efektif. Amplitudo invarian tree-level menyertakan kontribusi suku Born, suku pertukaran meson vektor kanal-t, dan suku kontribusi resonans nukleon spin-1/2, spin-3/2, dan spin-5/2. Resonans yang dipertimbangkan, yaitu N(1895)1 2 −, N(1900)3 2 +, N(2000)5 2 +, N(2060)5 2 −, N(2100)1 2 +, N(2120)3 2 −, N(2300)1 2 +, dan N(2570)5 2 −. Penampang lintang diferensial yang diperoleh dari perhitungan amplitudo invarian kemudian dibandingkan dengan data eksperimen kolaborasi A2 (2017) dan CLAS (2009). Tetapan sambat interaksi kuat diperoleh melalui fitting dengan meminimalkan χ2/N. Begitupun dengan amplitudo helisitas resonans yang tidak tercatat di Particle Data Group (PDG). Ditemukan bahwa resonans nukleon N(1895)1 2 − dan N(2100)1 2 + memiliki peran signifikan terhadap model.......η′-meson photoproduction on the nucleon has been studied using an isobar model with an effective Lagrangian approach. The tree-level invariant amplitudes consist of the nucleon Born terms, the t-channel vector meson exchanges, and the contribution of spin-1/2, spin- 3/2, and spin-5/2 nucleon resonances. Considered nucleon resonances are N(1895)1 2 −, N(1900)3 2 +, N(2000)5 2 +, N(2060)5 2 −, N(2100)1 2 +, N(2120)3 2 −, N(2300)1 2 +, and N(2570)5 2 −. The calculated differential cross section based on the invariant amplitudes was compared with the A2 (2017) and CLAS (2009) collaboration experimental data. The strong coupling constant was obtained through data fitting by minimizing the χ2/N. Using the same method, also obtained the resonance helicity amplitudes not recorded in the Particle Data Group (PDG). It was found that the N(1895)1 2 − and N(2100)1 2 + nucleon resonances play a significant role in the model."

"The objective of this book is to serve as a practical educational resource for clinical magnetic resonance imaging. The bulk of the text is organized along anatomic lines and discusses disease entities commonly encountered in clinical practice. The focus is illustrating and describing the MR appearances of the most commonly imaged disease entities, covering briefly in each area important points relative to imaging techniques then discussing in depth, the clinical MR interpretation. The breadth of clinical MRI is explored. For each subtopic within an anatomic region, clinical cases serve as the backbone for discussion, the most common pathologies affecting each anatomic region being illustrated. The final chapters discuss specifically contrast media and contrast enhanced MRA, two topics worthy of further description due to their present clinical importance. When relevant to diagnosis or essential for understanding, MR physics is discussed, however the reader is referred separately to Runge et al, The Physics of Clinical MR Taught Through Images 2nd Edition (New York: Thieme; 2009) for further elaboration. It is the goal that upon completing this text, the reader will have an appreciation for the complexity, utility, and versatility of MR in clinical imaging and will possess the knowledge essential for interpretation of basic clinical MR "

"This book about dipolar recoupling, solid-state NMR techniques for the structural determination of amyloid fibrils, solid-state 19F-NMR of peptides in native membranes, probing quadrupolar nuclei by solid-state NMR spectroscopy : recent advances, solid state NMR of porous materials zeolites and related materials, and solid-state NMR of inorganic semiconductors."

"Hasil pengamatan Resonansi Spin Elektron (RSE) pads bahan YBa2Cu3O6i yang dapat menunjukkan efek Meissner pada 77 K ternyata memberikan indikasi bahwa spektrum RSE berasal dari ion Cue+ dengan spin S = 0,5. Pengamatan dilakukan pada pita-X (frekuensi 9,204 Ghz) dan pada suhu kamar. Spektrum RSE menunjukkan adanya faktor Lande g anisotrop dan adanya pergeseran nilai g terhadap elektron babas (gc=2,0023). Harga-harga g yang terukur yaitu: g,,=2,038 , g,,= 2,117, dan gr= 2,219. Selain itu, spektrum RSE menunjukkan lebar kurva yang juga anisotrop. Data pengamatan yang diperoleh hanya memperlihatkan tiga nilai ekstrim lebar kurva RSE, mengingat bahan yang digunakan adalah poli kristal. Lebar kurva yang terukur adalah: qHpp, = 73 Gauss, 6Hppy = 78 Gauss dan 6Hpp, = 61 Gauss. Analisis teoritik dilakukan dengan pendekatan model 1 dimensi. Hasil analisis lebar kurva yang paling sesuai dengan hasil pengukuran menunjukkan bahwa: Proses relaksasi spin-spin (yang mempengaruhi lebar kurva RSE) terjadi melalui tranformasi energi dart reservoar Zeeman ke reservoar pertukaran (exchange). Dalam proses relaksasi ini dapat terjadi ketergantungan terhadap posisi bahan (anisotropi), karena terpengaruh oleh energi perturbasi yang sifatnya anisotrop. Energi perturbasi yang pengaruhnya dominan adalah interaksi pertukaran antisimetri (d-=4,6 10`° Hz), interaksi dipolar (rod = 1,5 .101° Hz) dan interaksi pertukaran simetri anisotrop (De=6,1 .109 Hz). "

"Human teeth enamel have been irradiated with gamma radiation from Co60 at room temperature and at liquid nitrogen temperature. Paramagnetic centers are formed and have been detected by using electron spin resonance (ESR) spectrometer at room temperature. The main signal is very stable asymmetric singlet, and attributed to h centers in the hydroxyapatite crystals. It is revealed that several factors influence the amplitude of the asymmetric signal. The amplitude and pattern of the asymmetric signal which depend on the orientation of the sample with respect to the magnetic field are analyzed. Based on the properties of the asymmetric signal the difference between the microcrystal arrangement of healthy and diseased teeth are explained."

"TUJUAN. Mengetahui akurasi MRI 0,5T dalam mendeteksi ruptur meniskus.BAHAN DAN CARA. Selama kurun waktu 6 bulan (Oktober 2004 sampai dengan Maret 2005) dilakukan pemeriksaan MRI terhadap 19 pasien (20 lutut) dengan klinis ruptur meniskus. Pemeriksaan MRI menggunakan MRI 0,5T superkondukting magnet, Bruker Tomikom, buatan Perancis tahun 2000 dan closely coupled extremity coil dengan teknik konvensional spin-echo T1W1 dan T2WI potongan sagital dan koronal. Dua kriteria MRI dalam mendiagnosis ruptur meniskus adalah adanya signal hiperintens intrameniskus pada T1W1 dan T2W1 yang dapat meluas ke permukaan sendi, ditemukannya morfologi meniskus yang abnormal seperti adanya perubahan kontur atau deformitas fokal meniskus. Untuk mempertajam diagnosis digunakan sistem penderajatan meniskus berdasarkan signal intrameniskus. HasiI pemeriksaan MRI dibandingkan dengan temuan artroskopi sebagai baku emas.HASIL. Sensitivitas, spesifisitas MRI 0,5T dalam mendeteksi ruptur meniskus adalah 84,4% dan 85,7% dengan akurasi 84,6%. Terdapat kesesuaian yang baik antara MRI 0,5T dengan artroskopi (k-D,573)KESIMPULAN. MRI 0,5T merupakan modalitas pencitraan non invasif yang mempunyai sensitivitas dan akurasi yang tinggi yang dapat digunakan untuk mendiagnosis adanya ruptur meniskus.Kata kunci : Ruptur meniskus, MRI, artroskopi.

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OBJECTIVE The purpose of this study was to evaluate the accuracy of MR imaging 0,5T in detecting meniscal tears.

MATERIALS AND METHOD& During an 6 months period (October 2004 until March 2005), 19 patients (20 knees) who had meniscal tears identified at physical examinations underwent MR imaging examinations. MR imaging was performed with a 0,5T (superconducting; Bruker Tomikom, France, 2000) and a closely coupled extremity coil, conventional spin-echo pulse sequences were used in sagital and coronal planes TI and T2 weighted images. Two MR imaging criteria to established the diagnose of meniscal tears were increased internal signal intensity in the meniscus on TI and T2-weighted images, abnormal morphology of the meniscus such as contour or focal deformities of the meniscus. To increase the accuracy of MR imaging, meniscal were grading according to the character of the intrameniscal MR imaging signal. MR imaging finding was compared with arthroscopic results as the standard of reference.

RESULTS. Sensitivity, specificity and accuracy MR imaging 0,5T for detecting meniscal tears were 84,4%, 85,7% and 84,6%. There is good correlation of MR imaging and arthroscopic findings (kappa = 0,573).

CONCLUSION. MR imaging is a non-invasive modality with high sensitivity and accuracy which can used in detecting meniscal tears.

Key wards : Meniscal tears, MR Imaging, arthroscopic."