Aerodynamic measuring device Patent

Pressure probe for sensing ambient static air pressure

IN-FLIGHT SHOCK-WAVE PRESSURE MEASUREMENTS ABOVE AND BELOW A BOMBER AIRPLANE AT MACH NUMBERS FROM 1.42 TO 1.69

In-flight shock wave pressure measurements above and below bomber aircraft at mach 1.42 to 1.6

Shot Noise in Mesoscopic Transport Through Localised States

We show that shot noise can be used for studies of hopping and resonant tunnelling between localised electron states. In hopping via several states, shot noise is seen to be suppressed compared with its classical Poisson value $S_I=2eI$ ($I$ is the average current) and the suppression depends on the distribution of the barriers between the localised states. In resonant tunnelling through a single impurity an enhancement of shot noise is observed. It has been established, both theoretically and experimentally, that a considerable increase of noise occurs due to Coulomb interaction between two resonant tunnelling channels.Comment: 7 pages, 5 figures; Proceedings of the 10th Conference on Hopping and Related Phenomena (Trieste 2003); requires Wiley style files (included

Constant amplitude and post-overload fatigue crack growth behavior in PM aluminum alloy AA 8009

A recently developed, rapidly solidified, powder metallurgy, dispersion strengthened aluminum alloy, AA 8009, was fatigue tested at room temperature in lab air. Constant amplitude/constant delta kappa and single spike overload conditions were examined. High fatigue crack growth rates and low crack closure levels compared to typical ingot metallurgy aluminum alloys were observed. It was proposed that minimal crack roughness, crack path deflection, and limited slip reversibility, resulting from ultra-fine microstructure, were responsible for the relatively poor da/dN-delta kappa performance of AA 8009 as compared to that of typical IM aluminum alloys

Parallel quantized charge pumping

Two quantized charge pumps are operated in parallel. The total current generated is shown to be far more accurate than the current produced with just one pump operating at a higher frequency. With the application of a perpendicular magnetic field the accuracy of quantization is shown to be $<$20 ppm for a current of $108.9$pA. The scheme for parallel pumping presented in this work has applications in quantum information processing, the generation of single photons in pairs and bunches, neural networking and the development of a quantum standard for electrical current. All these applications will benefit greatly from the increase in output current without the characteristic decrease in accuracy as a result of high-frequency operation

Novel Edge Excitations of Two-dimensional Electron Liquid in a Magnetic Field

We investigate the low-energy spectrum of excitations of a compressible electron liquid in a strong magnetic field. These excitations are localized at the periphery of the system. The analysis of a realistic model of a smooth edge yields new branches of acoustic excitation spectrum in addition to the well known edge magnetoplasmon mode. The velocities are found and the observability conditions are established for the new modes.Comment: 9 pages + 2 figures by request preprint TPI-MINN-93/59-

Spontaneous current generation in gated nanostructures

We have observed an unusual dc current spontaneously generated in the conducting channel of a short-gated GaAs transistor. The magnitude and direction of this current critically depend upon the voltage applied to the gate. We propose that it is initiated by the injection of hot electrons from the gate that relax via phonon emission. The phonons then excite secondary electrons from asymmetrically distributed impurities in the channel, which leads to the observed current

Pengukuran Komponen Zat Besi pada Laki-Laki Pendonor Darah Rutin di Kabupaten Gunung Kidul Tahun 2013

Iron deficiency is one of the most common nutritional disorder in the world and this can happen in the routine male blood donors. In people who donate blood on a regular basis are feared to iron deficiency without anemia. Thus a major concern of the donor screening for iron deficiency aiming for blood donors is to stay healthy and continue to donate blood. This study used a cross-sectional design in the male blood donors from Gunung Kidul who donate blood first, fifth and tenth times. Each donation made up of 25 people who were taken blood samples for serum iron (SI), total iron binding capacity (TIBC), transferrin saturation and serum ferritin examination. Results obtained in the first donation, the mean ferritin level was 91.78; the fifth donation increased ferritin levels in the amount of 111.49 and decreased again in the tenth donation donor group 65.28. Results of Kruskal Wallis test showed no significant difference between the mean ferritin levels in the first donation, the fifth and the tenth time (p=0.044). There is a decrease in body iron stores (serum ferritin) in the tenth donation while no changes for SI, TIBC and transferrin saturation. The more often one donate blood can cause first stage of iron deficiency which call as iron depletion. Therefore need to be considered dietary or nutritional status and also supplements provided after donor.Keywords : blood donor, iron status, Gunung KidulAbstrakDefisiensi besi adalah salah satu gangguan gizi yang paling umum dan bisa terjadi pada para pendonor darah laki-laki yang rutin. Pada pendonor darah yang sering mendonorkan darah, pada suatu waktu dikhawatirkan dapat terjadi defisiensi besi tanpa anemia. Tujuan dari penelitian adalah untuk mendapatkan hubungan kekerapan donasi dengan penurunan cadangan besi tubuh (feritin serum) dan saturasi besi. Penelitian ini menggunakan desain potong lintang pada para pendonor darah laki-laki di Gunung Kidul yang menyumbangkan darahnya pertama, kelima dan kesepuluh kali. Jumlah donor dari kelompok donasi sebanyak 25 orang yang diambil sampel darahnya untuk dilakukan pemeriksaan serum iron (SI), total iron binding capacity (TIBC), saturasi transferin dan feritin serum. Didapatkan hasil pada kelompok pendonor pertama kali, rerata kadar feritin adalah 91,78; pada kelompok pendonor yang menyumbangkan darahnya kelima kali terjadi peningkatan kadar feritin yaitu sebesar 111,49 dan menurun lagi pada kelompok pendonor donasi yang menyumbangkan darahnya kesepuluh kali yakni 65,28. Hasil uji kruskal wallis menunjukkan ada perbedaan rerata yang bermakna antara kadar feritin dari donasi pertama, kelima dan kesepuluh kali (nilai p=0,044). Kadar SI, TIBC dan saturasi transferin tidak mengalami Perubahan sedangkan cadangan besi tubuh (feritin serum) pada donasi kesepuluh mengalami penurunan. Semakin sering seseorang menyumbangkan darah dapat terjadi defisiensi besi tahap pertama yang disebut juga iron depletion.Kata kunci : donor darah, status zat besi, Gunung Kidu

Function and Platelet Count in Thrombocyte Concentrate (TC) During the Storage

Background: Evaluation for platelet transfusion is not optimal for this moment even in upstream at theblood center or in downstream at the hospital. The purpose of this study was to determine the effect ofstorage time to changes in pH, platelet count and function that occurs on platelet aggregation duringdifferent time storage.Methods: The study design was cross-sectional on selected bags of platelet concentrates that have passedthe screening for infection transmitted through blood transfusions. The regular assessment in UTDD forPC has been done every month by random sampling with three parameters pH, platelets count and volumein the bag of blood. The testing for pH, platelet count, and aggregation functions for 50 samples with threedifferent test time were conducted on day 0, third day, and fifth day storage.Results: On 50 bags samples, pH, and number of platelets increased, but the platelet aggregation functiondecreased on the third day of storage. On the fifth day of storage the pH, number of platelets and theplatelets aggregation function decreased and found the lowest number almost in all samples.Conclusion: The three parameters: pH, platelet counts, and aggregation functions decreased on the fifthday of storage. (Health Science Journal of Indonesia;2015;6:48-51