310 research outputs found
IV. Oxygen transport system before and after exposure to chronic hypoxia
No full textMaximal VO2 on the treadmill (VO2max) and on the bicycle ergometer (VO2peak), maximal cardiac output (Qmax), by a CO2 rebreathing method, maximal heart rate (HRmax), blood hemoglobin concentration (Hb), and hematocrit (Hct) were measured on six subjects before (B) and 3 weeks after (A) prolonged exposure to chronic hypoxia. It was observed that after high-altitude exposure VO2max, VO2peak, and Qmax were lower (P < 005) than before [A: 4.13 ± 0.67; 3.28 ± 0.41 and 16.89 ± 2.49 (1/min ± SD); B: 4.39 ± 0.39; 3.53 ± 0.34 and 21.81 ± 1.27, respectively}, whereas Hb and Hct were larger (A: 162 ± 8 g/l and 0.46 ± 0.02; B: 142 ± 7 and 0.41 ± 0.02) and HRmax was unchanged (178 ± 7 vs 175 ± 9 bts/min). Thus, we calculated stroke volume of the heart and the Hb flow at VO2 peak were lower in A than in B (95 ± 15 vs 124 ± 7 ml and 2,723 ± 307 vs 3,129 ± 196 g/min) (P < 0.05, respectively), whereas the arteriovenous O2 difference was greater in A than in B (195 ± 16 vs 162 ± 19 ml O2/l; P < 0.05). At any given submaximal work load, VO2 and HR were the same in B and in A, whereas Q was lower in A by ~ 2-3 l/min. However, because of the increased Hb, leading to a higher arterial O2 content, at any work load the O2 flow remained unchanged
First Class of Students
No full textMost of the first class of students posing on campus. From left to right: Ian S. Rudnick, James C. Howald, Thomas L. Yach, unidentified, Thomas Robert Kendall, Arthur Bardige, Clarice M. Moreth, David F. Parrish, Michael Yost, Jr., Gloria C. Cashin, Leroy Bolden, Robert O. Plaisted, Earl F. Hughes, unidentified, Georges L. Weatherly, Roller C. Beckhart, and Joaquin Lira-Olivareshttps://nsuworks.nova.edu/nsudigital_firststu/1000/thumbnail.jp
Students on Stairs
No full textStudents on stairs
Left row from top to bottom: Robert O. Plaisted, Clarice M. Moreth, Gloria C. Cashin, Ian S. Rudnick, Roller C. Beckhart, unidentified, Earl F. Hughes
Middle row from top to bottom: Joaquin Lira-Olivares, Georges L. Weatherly, Thomas L. Yach, David F. Parrish, Robert Kendall
Right row from top to bottom: Michael Yost, Jr., Arthur Bardige, unidentified, James C. Howald, Leroy Boldenhttps://nsuworks.nova.edu/nsudigital_firststu/1001/thumbnail.jp
Opening Day Registration
No full textOpening Day Registration of first class of doctoral students in the Rosenthal Student Center. Dean of Graduate Studies (later, President of NSU), Dr. Abraham S. Fischler, stands center right.
Sitting around the table are: Ian S. Rudnick, James C. Howald, Thomas L. Yach, Thomas Robert Kendall, Arthur Bardige, Clarice M. Moreth, David F. Parrish, Michael Yost, Jr., Gloria C. Cashin, Leroy Bolden, Robert O. Plaisted, Earl F. Hughes, Georges L. Weatherly, Roller C. Beckhart, Joaquin Lira-Olivares, plus others.https://nsuworks.nova.edu/nsudigital_firststu/1009/thumbnail.jp
Abstract Identifying Authorship by Byte-Level N-Grams: The Source Code Author Profile (SCAP) Method
No full textSource code author identification deals with identifying the most likely author of a computer program, given a set of predefined author candidates. There are several scenarios where digital evidence of this kind plays a role in investigation and adjudication, such as code authorship disputes, intellectual property infringement, tracing the source of code left in the system after a cyber attack, and so forth. As in any identification task, the disputed program is compared to undisputed, known programming samples by the predefined author candidates. We present a new approach, called the SCAP (Source Code Author Profiles) approach, based on byte-level n-gram profiles representing the source code author’s style. The SCAP method extends a method originally applied to natural language text authorship attribution; we show that an n-gram approach also suits the characteristics of source code analysis. The methodological extension includes a simplified profile and a less complicated, but more effective, similarity measure. Experiments on data sets of different programming-language (Java or C++) and commented/commentless code demonstrate the effectiveness of these extensions. The SCAP approach is programming-language independent. Moreover, the SCAP approach deals surprisingly well with cases where only a limited amount of very shor
PROGRESS IN NONCONTRACT DYNAMIC FORCE MICROSCOPY
No full textLÜTHI R, MEYER E, HOWALD L, et al. PROGRESS IN NONCONTRACT DYNAMIC FORCE MICROSCOPY. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B. 1994;12(3):1673-1676.The technique of operating the scanning force microscope in the dynamic noncontact mode (dynamic force microscopy) has been improved. Home-built instruments based on an optical beam deflection scheme in two different environments were used. The two force microscopes were operated in ambient air and in ultrahigh vacuum, respectively. In order to control the oscillating cantilever different methods were applied: slope-detection (lock-in amplifier, RMS-to-DC converter) and frequency modulation (FM) technique as well. The advantages of this nondestructive technique are demonstrated on different samples, such as soft organic matter (hexagonally packed intermediate layer, Langmuir-Blodgett film), layer-structured compounds (CdI2), n-doped Si(111), and ferroelectric crystals [triglycine sulfate (TGS), guanidinium aluminum sulfate hexahydrate (GASH)]. On TGS and GASH cleavage faces, the ferroelectric domains and domain walls could be imaged. From experimental data a spatial resolution of about 1-2 nm in lateral and <0.1 nm in vertical directions could be determined
Evidence for long timescale (> 10(3) years) changes in hydrothermal activity induced by seismic events
No full textThe pollen C-14 age and oxygen isotopic composition of siliceous sinter deposits from the former Beowawe geyser field reveal evidence of two hydrothermal discharge events that followed relatively low-magnitude (10(-11)m(2)) following each earthquake. However, the timescale for onset of thermal convection implied by an overturned temperature profile in a geothermal well 300m from the Malpais fault is much shorter: 200-1000years. We speculate that individual segments of the Malpais fault become clogged on shorter timescales and that upward flow of groundwater subsequently follows new routes to the surface
Experimental conditions for respiration and growth studies of F0 and F1 larval and juvenile European seabass Dicentrarchus labrax
No full textWater parameters in the 2 years before spawning of F0 (08.02.2016-06.03.2018) and during larval and juvenile phase of F1: Larval period until 17.05.2018 (48 dph, 900 dd) and 01.06.2018 (63 dph, ~900 dd) for warm and cold life condition respectively, for the juveniles until 28.09.2018 (180 dph, ~4000 dd) and 12.02.2019 (319 dph, ~5100 dd) for warm and cold conditioned fish respectively. Means ± s.e. over all replicate tanks per condition. Temperature (Temp.), pH (free scale), salinity, oxygen and total alkalinity (TA) were measured weekly in F1 and monthly in F0; sea water (SW) measurements were conducted in 2017 and 2018. Water parameters during larval and early juvenile phase of F0: Larval period until (45 dph, 900 dd, 06.12.2013), early juveniles until 1.5 years. Means ± s.e.m. over all measurements per condition (triplicate tanks in larvae, single tanks in juveniles). Temperature (Temp.) and pH (NBS scale) were measured daily. pH (total scale), salinity, phosphate, silicate and total alkalinity (TA) were measured once at the beginning and once at the end of the larval phase and 9 times during juvenile phase; PCO2 was calculated with CO2sys; A–Ambient PCO2, D1000 –ambient + 1000 µatm CO2, L – Larvae, J – Juveniles
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