Integrally regulated solar array demonstration using an Intel 8080 microprocessor

A concept for regulating the voltage of a solar array by using a microprocessor to effect discrete voltage changes was demonstrated. Eight shorting switches were employed to regulate a simulated array at set-point voltages between 10,000 and 15,000 volts. The demonstration showed that the microprocessor easily regulated the solar array output voltage independently of whether or not the switched cell groups were binary sized in voltage. In addition, the microprocessor provided logic memory capability to perform additional tasks such as locating and insolating a faulty switch

Cold-flow startup test summary of a full-scale nuclear rocket engine using a radial turbopump

Cold flow startup test on nuclear rocket engine using radial turbopum

Transfer function determination of the primary loop of a conceptual nuclear Brayton space powerplant

Transfer functions for primary loop of conceptual nuclear Brayton space power plan

KEWENANGAN BADAN PERTANAHAN NASIONAL DALAM PEMBERIAN HAK ATAS TANAH NEGARA MENURUT UNDANG-UNDANG NOMOR 5 TAHUN 1960 TENTANG PERATURAN DASAR POKOK-POKOK AGRARIA

Tujuan dilakukannya penelitian ini adalah untuk mengetahui bagaimana kewenangan Badan Pertanahan Nasional (BPN) dalam pemberian hak atas tanah negara dan bagaimana tata cara pemberian hak atas tanah negara oleh Badan Pertanahan Nasional (BPN).  Dengan menggunakan metode penelitian yuridis normatif, disimpulkan: 1. Kewenangan Badan Pertanahan Nasional (BPN) dalam pemberian hak atas tanah negara yaitu BPN mempunyai kewenangan untuk menentukan luasnya tanah pemberian; kewenangan BPN dalam pelaksanaan program transmigrasi, reditribusi tanah, konsolidasi tanah, pendaftaran tanah, dan kewenangan BPN dalam pemberian hak atas tanah negara baik hak milik, hak guna usaha, hak guna bangunan dan hak pakai. Pelaksanaan fungsi pengaturan dan penetapan hak-hak atas tanah dapat dilaksanakan sendiri oleh Kepala Badan Pertanahan Nasional Republik Indonesia, atau dapat juga dilimpahkan kewenangannya kepada Kepala kantor wilayah Badan Pertanahan Nasional Provinsi, atau Kepala Badan Pertanahan Nasional Kabupaten/Kota. 2. Tata cara pemberian hak atas tanah negara oleh Badan Pertanahan Nasional (BPN) yaitu meliputi hak milik, hak guna usaha, hak guna bangunan dan hak pakai. Sebelum mengajukan permohonan hak, pemohon harus menguasai tanah yang dimohon dibuktikan dengan data yuridis dan data fisik sesuai dengan ketentuan peraturan perundang-undangan yang berlaku. Dalam hal tanah yang dimohon merupakan tanah kawasan hutan, harus terlebih dahulu dilepaskan dari statusnya sebagai kawasan hutan sesuai dengan ketentuan peraturan perundang-undangan yang berlaku. Tanah-tanah tertentu yang diperlukan untuk konversi yang ditetapkan oleh kepala Badan Pertanahan Nasional RI tidak dapat dimohon dengan sesuatu hak atas tanah.Kata kunci: Kewenangan, Badan Pertanahan Nasional, Pemberian Hak, Tanah Negara

Extracellular Matrix Proteins and Tumor Angiogenesis

Tumor development is a complex process that relies on interaction and communication between a number of cellular compartments. Much of the mass of a solid tumor is comprised of the stroma which is richly invested with extracellular matrix. Within this matrix are a host of matricellular proteins that regulate the expression and function of a myriad of proteins that regulate tumorigenic processes. One of the processes that is vital to tumor growth and progression is angiogenesis, or the formation of new blood vessels from preexisting vasculature. Within the extracellular matrix are structural proteins, a host of proteases, and resident pro- and antiangiogenic factors that control tumor angiogenesis in a tightly regulated fashion. This paper discusses the role that the extracellular matrix and ECM proteins play in the regulation of tumor angiogenesis

Operating characteristics of the primary flow loop of a conceptual nuclear Brayton space powerplant

Steady state and transient operating characteristics of lithium cooled primary flow loop of nuclear Brayton space power plan

Shot-noise-limited spin measurements in a pulsed molecular beam

Heavy diatomic molecules have been identified as good candidates for use in electron electric dipole moment (eEDM) searches. Suitable molecular species can be produced in pulsed beams, but with a total flux and/or temporal evolution that varies significantly from pulse to pulse. These variations can degrade the experimental sensitivity to changes in spin precession phase of an electri- cally polarized state, which is the observable of interest for an eEDM measurement. We present two methods for measurement of the phase that provide immunity to beam temporal variations, and make it possible to reach shot-noise-limited sensitivity. Each method employs rapid projection of the spin state onto both components of an orthonormal basis. We demonstrate both methods using the eEDM-sensitive H state of thorium monoxide (ThO), and use one of them to measure the magnetic moment of this state with increased accuracy relative to previous determinations.Comment: 12 pages, 6 figure

Approaching the High Intrinsic Electrical Resistivity of NbO2 in Epitaxially Grown Films

NbO2 is a promising candidate for resistive switching devices due to an insulator-metal transition above room temperature, which is related to a phase transition from a distorted rutile structure to an undistorted one. However, the electrical resistivity of the NbO2 thin films produced so far has been too low to achieve high on-off switching ratios. Here, we report on the structural, electrical, and optical characterization of single-crystalline NbO2 (001) thin films grown by pulsed laser deposition on MgF2 (001) substrates. An annealing step reduced the full width at half maximum of the NbO2 (004) x-ray Bragg reflection by one order of magnitude, while the electrical resistivity of the films increased by two orders of magnitude to about 1k Omega cm at room temperature. Temperature-dependent resistivity measurements of an annealed sample revealed that below 650K, two deep-level defects with activation energies of 0.25eV and 0.37eV dominate the conduction, while above 650K, intrinsic conduction prevails. Optical characterization by spectroscopic ellipsometry and by absorption measurements with the electric field vector of the incident light perpendicular to the c-axis of the distorted rutile structure indicates the onset of fundamental absorption at about 0.76eV at room temperature, while at 4K, the onset shifts to 0.85eV. These optical transitions are interpreted to take place across the theoretically predicted indirect bandgap of distorted rutile NbO2