cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Über konforme Abbildung, Vorlesung von Adolf Hurwitz.
Notizen, ausgearbeitet von Adolf Hurwitz
Creators: name: Hurwitz, Adolf
Publisher: name: [s.n.]
Year: 1889

description: Notizen zur Vorlesung, vorgetragen im Wintersemester 1889/90 an der Albertus-Universität Königsberg.
Text, auf 31 Bl. notiert, mit Figuren. Es sind 2 Bl. mit weiteren Notizen lose ergänzt.
Abschliessend 17 Bl. leer
Theorie der Ungleichungen, Seminar von Adolf Hurwitz.
Notizen, ausgearbeitet von Adolf Hurwitz
Creators: name: Hurwitz, Adolf
Publisher: name: [s.n.]
Year: 1905

description: Notizen zum Seminar, abgehalten im Sommersemester 1905 am Eidgenössischen Polytechnikum.
Text mit Figuren.
Hs 582:92-95 wurden von Adolf Hurwitz in einem Briefumschlag mit dem Titel "Mathematisches Seminar" zusammengefasst
Born-Infeld extension of Lovelock brane gravity
Creators: name: Cruz, Miguel
name: Rojas, Efraín
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a Born-Infeld type theory to describe the evolution of p-branes propagating in an N = (p+2)-dimensional Minkowski spacetime. The expansion of the BI-type volume element gives rise to the (p+1) Lovelock brane invariants associated with the worldvolume swept out by the brane. Contrary to the Lovelock theory in gravity, the number of Lovelock brane Lagrangians differs in this case, depending on the dimension of the worldvolume as a consequence that we consider the embedding functions, instead of the metric, as the field variables. This model depends on the intrinsic and the extrinsic geometries of the worldvolume and in consequence is a second-order theory as shown in the main text. A classically equivalent action is discussed and we comment on its Weyl invariance in any dimension which naturally requires the introduction of some auxiliary fields.
description: 14 pages, no figures. Substantial changes, references added. Published in CQG
The Effect of pH on the Workability of Concrete
Creators: name: Linderman, Robert Bruce
Publisher: name: California Institute of Technology
Year: 1952
Subjects: subject: Civil Engineering
subject: FOS: Civil engineering

description: It was believed that the pH of concrete would affect
the workability. The effect of pH on the workability was
determined experimentally by adding chemical admixtures
to a cement mortar mix, measuring the pH and workability.

pH was measured by a Beckman Glass Electrode pH
Meter equipped with a standard Calomel electrode and a
special type "42" glass electrode. The use of the type "42"
glass electrode made it possible to place the electrodes in
wet cement mortar without damage.

The workability was determined by measuring the
penetration of a three inch diameter cylinder with a
hemispherical tip. This ball penetration measure of workability
has a linear relationship to that measured by the slump test.

From these tests it was found that the pH has no effect
on the workability of cement mortar. The admixtures changed
both the pH and the workability, however, the variations in pH
and workability were independent of each other. It is believed
that the major factor which affects the workability of concrete
is the dispersing effect of the admixture on the cement.
Zu "Vorlesungen über Funktionentheorie", Kapitel: Asymptotische Darstellung der Funktionen.
Notizen, ausgearbeitet von Adolf Hurwitz
Creators: name: Hurwitz, Adolf
Publisher: name: [s.n.]
Year: 1892

description: Ausarbeitung eines Kapitels für "Allgemeine Funktionentheorie und elliptische Funktionen" (Berlin, Springer 1922), ohne direkt entsprechendes Äquivalent im späteren Druck.
Text mit Figuren
Mathematisches Seminar, Seminar von Adolf Hurwitz.
Notizen, ausgearbeitet von Adolf Hurwitz
Creators: name: Hurwitz, Adolf
Publisher: name: [s.n.]
Year: 1898

description: Notizen für das Seminar, abgehalten zu aktuellen mathematischen Themen, notiert im Heft im Wintersemester 1902/03, im Sommersemester 1903 (mit den zwei Zwischentiteln Potenzreihen und Cauchy's Satz), Wintersemester 1903/04 sowie im Wintersemester 1904/05 am Eidgenössischen Polytechnikum.
Zusätzlich lose eingelegt: 9 Bl./16 S. Notizen entstanden im Hinblick auf die Veranstaltung des Seminars in den Jahren 1917 und 1918, sowie Notizen ohne Datum.
Weiter zusätzlich lose eingelegt: 6 S. Notizen zur Funktionentheorie, vermutlich ebenfalls im Zusammenhang mit der Veranstaltung des math. Seminars, ohne Datum, auf der Rückseite je einen historisch weiterverwendeten Textteil aus einem anderen Kontext enthaltend: zusammengehörende Teile von Bewertungsbogen, sog. Zensurenlisten, der VI. Abteilung A in Physik (Prof. Weber), u.a. mit Walter Ritz im II. Jahreskurs, sowie in Astronomie und weiteren Fächern (Prof. Wolfer) aus dem Wintersemester 1898/99 (vermutlich nach Ablauf einer Frist weiterverwendet).
Text mit Figuren.
Abschliessend 1 Bl. leer.
Beilage: 1 Bl. aus einer nicht bezeichneten Zeitschrift, S. 337f., mit u.a. Aufgabenstellung von G. Polya und Bleistiftnotizen zu Lösungen, vermutlich notiert von Adolf Hurwitz.
Das Material, das mit den Signaturen Hs 582:92-95 verzeichnet ist, war in einem originalen Briefumschlag mit dem Titel "Mathematisches Seminar" zusammengefasst
Aufgabenstellungen für Prüfungen (Diplome und Doktorat), durchgeführt von Adolf Hurwitz.
Notizen, ausgearbeitet von Adolf Hurwitz
Creators: name: Hurwitz, Adolf
Publisher: name: [s.n.]
Year: 1892

description: Notizen für Prüfungen bei Adolf Hurwitz am Eidgenössischen Polytechnikum in Zürich.
Text mit Figuren.
Verschiedene einzeln geführte Notizblätter, meist für die Zeit ab ca. 1910, zum Teil nicht datiert, zuvor abgelegt in einem Umschlag beschriftet mit: "Fragen für Diplomprüfungen".
Die Blätter sind zum Teil mit Titel überschrieben oder enthalten Namen oder Daten.
Genannt werden Naville, Odermatt, Dändliker, Aeppli, mit Notenvermerken, offenbar für 14.3.1918, mit Angabe "Gollaz zugegen", anschliessend für 20.3.1918 betr. Algebra und Zahlentheorie Notizen.
In Notizen vom 24.7.1917 finden sich Fragen für Leutenegger, Herter, Urech, in weiteren Notizen vom Juli 1918 solche für Loeffler, Stierlin, Vaterlaus, Jeanneret, Loeliger vorbereitet.
Eine kleinste Aufnotierung und eingestreut weitere kleine Notizen weisen keine Daten auf, in einem Fall vermutlich nach 19. März 1919 zu datieren.
Unter den Titeln "Diplomprüfung in Algebra" (an einer Stelle Juli 1912 dat.), inwendig "Zahlentheorie", "Reelle Funktionen und Zahlentheorie", "Diplomprüfungen in Funktionentheorie" finden sich weitere Aufgaben. 1910, 1912, 1914 sind als Angaben vorhanden, sowie einmal ein Vermerk "Dr.-Prüfung Levy", letzterer nicht datiert.
Da eine etwas heterogene Sammlung vorliegt, in der Abfolgen unklar bleiben, sind für ein besseres Verständnis alle aus anderem Kontext stammenden Rückseiten sowie die Leerseiten digitalisiert worden.
Hs 582:92-95 wurden von Adolf Hurwitz in einem Briefumschlag mit dem Titel "Mathematisches Seminar" zusammengefasst
Tulostoma morenoi V. Vlasenko & A. Vlasenko 2023, sp. nov.
Creators: name: Vlasenko, Vyacheslav A.
name: Vlasenko, Anastasia V.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Agaricales
Agaricaceae
Tulostoma
Tulostoma morenoi

description: Tulostoma morenoi V. Vlasenko & A. Vlasenko, sp. nov. Figs. 1, 2. MycoBank: MB847495. Description: —Spore-sac subglobose, 9 mm wide, 7 mm tall. Exoperidium indistinct, incrusting sand, remaining as a cup-like structure at the base of the spore-sac. Endoperidium thin, smooth, slightly creamy-brownish to grayish white. Mouth oval, indistinct. Socket inconspicuous. Stem slender, 2–3.5 mm wide, 30–35 mm tall, slightly creamy-brownish to grayish white, somewhat longitudinally furrowed to fissured and appressed scaly closer to the spore-sac, with a small basal mycelial bulb. Mature gleba orange brown. Capillitial threads (1.6)3.5–4(6.3) µm wide, hyaline, undulating, irregular thickness, thick-walled, with uneven inner walls, ramified. Septa rare, slightly widened up to strongly widened. Spores subglobose, regularly verrucose, 5.6–8.5 × 6.6–9.2 μm without ornamentation, 6.2–9.8 × 6.8–10.6 μm including warts. Warts are large, 6–7 on visible side of spore, 0.5–0.6 μm wide, 0.8–0.9 μm length, more or less isolated or merging into groups with small warts or forming ridge-like anastomoses at the base, visible on SEM. Etymology: —The specific epithet honors Gabriel Moreno, Spanish mycologist, for his extraordinary work of study of gasteroid fungi. Type: — RUSSIA. Republic of Tuva, Tandinsky district, near lake Kak-Khol, 51°21.415’ N, 94°23.497’ E, 701 m a.s.l, scattered shrub communities with Caragana pygmaea, on dry sandy soil, 8 July 2021, leg. A . Vlasenko, NSK 1014816 (holotype), GenBank: OQ241379 (ITS), OQ236484 (28 S). Other specimens examined: — RUSSIA. Republic of Tuva, Tandinsky district, near lake Khadyn, 51°21.234’ N, 94°29.067’ E, 716 m a.s.l, sandy steppe, on dry sandy soil, 7 July 2021, leg. A . Vlasenko, NSK 1014982. Ecology and distribution: —Occurs in dry saline sandy habitats along lake shores. Grows singly, not in groups. Known only from Republic of Tuva.
description: Published as part of Vlasenko, Vyacheslav A. & Vlasenko, Anastasia V., 2023, A new species of Tulostoma genus from Siberia, pp. 25-34 in Phytotaxa 600 (1) on pages 28-30, DOI: 10.11646/phytotaxa.600.1.4, http://zenodo.org/record/8054168
Geology of the St. Francis Dam Area, Los Angeles County, California
Creators: name: Ruiz-Elizondo, Jesus
Publisher: name: California Institute of Technology
Year: 1953
Subjects: subject: Ventura Basin
subject: St. Frances Dam
subject: San Francisquito Canyon
subject: Dry Canyon
subject: Mint Canyon Formation
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Charlie Canyon

description: About 500 feet of Tertiary sediments is exposed in the general vicinity of the old St. Frances Dam Reservoir, in San Francisquito Canyon, Los Angeles County, California.  The area where these sediments occur is located in the easternmost part of the Ventura Basin.

At least 500 feet of well bedded red siltstones, shales, sandstones and conglomerates of continental origin is overlain by 2700 feet of piedmont deposits made up of coarse conglomerates, fanglomerates, and associated finer grained clastic rocks.  No specific age can be assigned to these deposits, but to the north they are unconformably underlain by marine strata of Eocene age.  These are thick bedded to massive arkoses.  To the west, south and southwest the piedmont deposits are unconformably overlain by non-marine conglomerates and massive sandstones of the Upper Miocene Mint Canyon formation.  The evidence prevails that the sediments in the area studied become progressively younger to the south and to the west, as happens everywhere else in the easternmost part of the Ventura Basin.  Fossiliferous beds of the uppermost Miocene Modelo formation unconformably overlie the Mint Canyon beds to the south and to the west.

Pre-Cretaceous rocks composed of gray, quartz-muscovite, schist crop out in the northeasternmost part of the area. Metaquartzites and quartz veins are minor parts of this terrane.  This group of rocks is known as Pelona Schists.

Pre- and post-Mint Canyon dip slip reverse faulting seems to form the dominant structural feature of the area.  A possibility of normal faulting exists in the northwestern part of the area, between Eocene(?)-Miocene(?) rocks and the Mint Canyon formation, and is fully considered in the text.

The sedimentary formations are folded, and the axes follow a northwest-southeast direction in the northern part of the area, and are probalby related to a first stage deformation in pre-Mint Canyon times; to the south, the fold axes trend north-south, and seem to be related to a second stage of deformation that probably took place in post-late Miocene time.

The area is in its late youth to early mature state of topographic development. The stream along San Francisquito Canyon cuts across the structure of the Pelona schists indiscriminately for at least one mile, reflecting inheritance of a drainage system established under different conditions.  Cavernous weathering is largely confined to many beds of hard, massive, conglomeratic sandstone of Eocene(?)-Miocene(?) age, in the north central part of the area.
Inflationary paradigm in trouble after Planck2013
Creators: name: Ijjas, Anna
name: Steinhardt, Paul J.
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent results from the Planck satellite combined with earlier observations from WMAP, ACT, SPT and other experiments eliminate a wide spectrum of more complex inflationary models and favor models with a single scalar field, as reported by the Planck Collaboration. More important, though, is that all the simplest inflaton models are disfavored statistically relative to those with plateau-like potentials. We discuss how a restriction to plateau-like models has three independent serious drawbacks: it exacerbates both the initial conditions problem and the multiverse-unpredictability problem and it creates a new difficulty that we call the inflationary "unlikeliness problem." Finally, we comment on problems reconciling inflation with a standard model Higgs, as suggested by recent LHC results. In sum, we find that recent experimental data disfavors all the best-motivated inflationary scenarios and introduces new, serious difficulties that cut to the core of the inflationary paradigm. Forthcoming searches for B-modes, non-Gaussianity and new particles should be decisive.
description: 6 pages, 1 figure, accepted for publication in Phys.Lett.B
Rotating Wave Approximation of the Law's Effective Hamiltonian on the Dynamical Casimir Effect
Creators: name: Fujii, Kazuyuki
name: Suzuki, Tatsuo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper we treat the Law's effective Hamiltonian of the Dynamical Casimir Effect in a cavity and construct an analytic approximate solution of the time-dependent Schr{ö}dinger equation under the general setting through a kind of rotating wave approximation (RWA). To the best of our knowledge this is the finest analytic approximate solution.
description: Latex; 12 pages; no figure; minor changes (references updated). To appear in International Journal of Geometric Methods in Modern Physics
Accuracy of magnetic energy computations
Creators: name: Valori, G.
name: Demoulin, P.
name: Pariat, E.
name: Masson, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: For magnetically driven events, the magnetic energy of the system is the prime energy reservoir that fuels the dynamical evolution. In the solar context, the free energy is one of the main indicators used in space weather forecasts to predict the eruptivity of active regions. A trustworthy estimation of the magnetic energy is therefore needed in three-dimensional models of the solar atmosphere, eg in coronal fields reconstructions or numerical simulations. The expression of the energy of a system as the sum of its potential energy and its free energy (Thomson's theorem) is strictly valid when the magnetic field is exactly solenoidal. For numerical realizations on a discrete grid, this property may be only approximately fulfilled. We show that the imperfect solenoidality induces terms in the energy that can lead to misinterpreting the amount of free energy present in a magnetic configuration. We consider a decomposition of the energy in solenoidal and nonsolenoidal parts which allows the unambiguous estimation of the nonsolenoidal contribution to the energy. We apply this decomposition to six typical cases broadly used in solar physics. We quantify to what extent the Thomson theorem is not satisfied when approximately solenoidal fields are used. The quantified errors on energy vary from negligible to significant errors, depending on the extent of the nonsolenoidal component. We identify the main source of errors and analyze the implications of adding a variable amount of divergence to various solenoidal fields. Finally, we present pathological unphysical situations where the estimated free energy would appear to be negative, as found in some previous works, and we identify the source of this error to be the presence of a finite divergence. We provide a method of quantifying the effect of a finite divergence in numerical fields, together with detailed diagnostics of its sources.
Geology of the northern part of the Santa Ana Mountains, Orange County, California
Creators: name: Lewis, Lloyd Alan
Publisher: name: California Institute of Technology
Year: 1941
Subjects: subject: Santiago Canyon
subject: Chino fault
subject: Puente Hills
subject: Santa Ana Mountains
subject: Whittier fault
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Corona Quadrangle
subject: Martinez Formation

description: The area covered includes parts of the northern end of the Santa Ana Mountains and the southeastern corner of the adjoining Puente Hills.  The area is somewhat larger than 50 square miles.  The work was done during the academic years of 1939-40 and 1940-41 while the author was the holder of the Standard Oil Company of California’s fellowship in geology.  The purpose of the mapping was to work out the stratigraphic and structural relations of the rocks exposed in this area.  Most of the area on the northeast side of the Santa Ana Mountains had never been mapped before and the differentiation of the Cretaceous and lower Tertiary sediments had never been attempted.

The rocks of the northern Santa Ana Mountains range in age from pre-Triassic to Quaternary.  The Triassic and pre-Triassic rocks are a complex of slates, sandstones, conglomerates and limestones which have been intruded by Jurassic acid intrusives and by andesitic extrusives of pre-Cretaceous age.  The oldest un-metamorphosed rocks are upper Cretaceous in age.  They lie with profound unconformity upon the Basement Complex of the Triassic and Jurassic rocks.  The Tertiary rocks range in age from Eocene to upper Miocene.  They consist of an alternating succession of conglomerates, sandstones, and shales with the sandstones and conglomerates predominating.  Most of the Tertiary formations progressively overlap each other towards the southeast.  The lithology of the entire sections is so similar that it has been, at times, very difficult to recognize the stratrigraphic position of sediments bounded by faults.

Viewing the structure of the northern end of the Santa Ana Mountains as a whole, it seems to be a large asymmetrical anticline with gentle southwestward dips on the southwest side and nearly vertical, and frequently overturned, dips on the northeast side.  This structure is complicated by considerable faulting.  The faults, in general, trend northwest-southeast and they are generally parallel with the strike of the sediments.  The area is also the scene of the junction of the Chino and Whittier faults which are two of the major faults of Southern California.  Much of the area mapped lies between these two faults and this area is a mosaic of slice-blocks in which the dips of strata are always nearly vertical.  As far as can be determined, the attitude of the faults is nearly vertical; some of them are reverse faults.  Movement on many of the faults has been strike-slip as well as dip-slip.
I.  The crystal structure of 9-methyl guanine hydrochloride monohydrate. II.  Preliminary studies on [C_(27)H_(56)N_2Cl]^+•[H_(13)O_6]^+•2 Cl^- a bicyclic diammonium ion containing a caged chloride
Creators: name: Bell, Robert Allan
Publisher: name: California Institute of Technology
Year: 1972
Subjects: Chemistry

description: The structure of 9-Methyl Guanine HC1 Monohydrate,
C_6H_8N_5OC1•H_2O, has been determined by single crystal x-ray analysis. The whitish salt crystallizes in the monoclinic space group P2_1/c with unit cell dimensions a = 5.324(2), b = 11. 236(15) c = 15.533(10) and β = 96.11(3)°. There are four molecules in the unit cell and thus, one in the asymmetric unit. The measured density of 1.581 gm cm^(-3) is in close agreement with the calculated values of 1.578 gm cm^(-3). Three-dimensional intensity data were collected on a Datex-automated General Electric diffractometer using CoKα radiation. The structure was
determined by Patterson and Fourier methods and refined by
Fourier and least squares techniques to a final R index of 0.067 for 1224 reflections.

The molecules crystallize in slightly buckled planes
which are parallel to and lie half way between the 104 plane of the unit cell. They are hydrogen bonded to chloride ions and water molecules between the planes and to each other within the plane. The water molecules and the chloride ions form staggered columns perpendicular to the molecular planes. The six hydrogen bonds, N(10A)-H•••N(3B), N(10A)-H•••O(2) N(1A)-H•••Cl^-, N(7A)-H•••Cl^-, O(2)-H(9)•••Cl^-, and O(2)-H(10)•••Cl^- are respectively 3.072, 2.828, 3.294, 3.191, 3.257, and 3.125 Å in length. The molecular planes are 3.17 and 3.33 Å apart.
An experimental investigation of the recirculation zone of laminar flames stabilized on bluff bodies at low Reynolds numbers
Creators: name: Gerichten, Robert L. von
Publisher: name: California Institute of Technology
Year: 1954
Subjects: Aeronautics

description: NOTE:  Text or symbols not renderable in plain ASCII are indicated by [...].  Abstract is included in .pdf document.

As part of a program to explain the shift in the maximum blowoff velocity from stoichiometric mixture ratio for small flame holder sizes, laminar flame stabilization studies were made using cylindrical flame holders of 0.031 to 0.125 inches in diameter at Reynolds numbers in the range of 10[^3] to 10[^4]. Chemical samples of the gases in the recirculation region behind the flame holders were taken and analyzed to determine the composition of the burning gases at the flame front. Maximum temperature measurements were taken of this same region. It was found that at these low Reynolds numbers, the composition was different than in the unburned approach mixtures, and that this was apparently due to the difference in molecular diffusion of the fuel and air across the flame front. The variation in the composition of the burning gases appears to be a direct function of the approach fuel-air mixture ratio for each diameter and approach mixture velocity.
Exact rings and semirings
Creators: name: Wilding, David
name: Johnson, Marianne
name: Kambites, Mark
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16Y60, 14T05, 20M10

description: We introduce and study an abstract class of semirings, which we call exact semirings, defined by a Hahn-Banach-type separation property on modules. Our motivation comes from the tropical semiring, and in particular a desire to understand the often surprising extent to which it behaves like a field. The definition of exactness abstracts an elementary property of fields and the tropical semiring, which we believe is fundamental to explaining this similarity. The class of exact semirings turns out to include many other important examples of both rings (proper quotients of principal ideal domains, matrix rings and finite group rings over these and over fields), and semirings (the Boolean semiring, generalisations of the tropical semiring, matrix semirings and group semirings over these).
description: 17 pages; fixed typos, clarified a few points, changed notation in Example 6.1
«Νέες τεχνολογίες και ρομποτική στην Έρευνα και Διάσωση» #SearchAndRescue #ICT #Robotics #AI #lecture
Creators: name: Georgiou, Harris
Publisher: name: Zenodo
Year: 2023
Subjects: Search and Rescue
ICT
Artificial Intelligence
AI
Robotics

description: «Νέες τεχνολογίες και ρομποτική στην Έρευνα και Διάσωση» #SearchAndRescue #ICT #Robotics #AI #lecture Περιεχόμενα: Επιχειρήσεις Έρευνας και Διάσωσης σε αστικό περιβάλλον / προβλήματα και τεχνολογικά «κενά» / Άξονας 1: τεχνολογίες για την ασφάλεια του διασώστη / Άξονας 2: τεχνολογίες εντοπισμού θυμάτων / Άξονας 3: τεχνολογίες τηλεπικοινωνιών και συντονισμού / «έξυπνες» ρομποτικές τεχνολογίες για έρευνα σε ερείπια / Μελέτη περιπτώσεων από ερευνητικά προγράμματα EU Horizon 2020. Επίπεδο γνώσεων (από): Οποιοδήποτε Προαπαιτούμενα: Κανένα
Low-density gas dynamic facility
Creators: name: McGill, James A.
Publisher: name: California Institute of Technology
Year: 1967
Subjects: Aeronautics

description: The question of optimizing nozzle contours for micro-thrust rockets led to the design, construction, and testing of a low-density gas dynamic facility. The primary objective was to investigate the mass flow rates of a gas through various profiles in the slip and transition flow regimes at high pressure ratios.

An initial test was conducted with an orifice as the test profile. The results showed that the facility can be used to investigate mass flow rates from the threshold of the free-molecule, through the transition and slip, to the continuum regimes. These results compare favorably with those of two previous investigators, and asymptotically approach the theoretical continuum and free-molecule limits. The ratio of mass flow rate to theoretical free-molecule mass flow rate is shown to transition smoothly from one theoretical limit to the other. A local maximum may occur in this ratio in the slip regime, and the attainment of the theoretical free-molecule limit appears to occur more slowly than expected.
Discovery of Molecular Hydrogen in White Dwarf Atmospheres
Creators: name: Xu, S.
name: Jura, M.
name: Koester, D.
name: Klein, B.
name: Zuckerman, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: With the Cosmic Origins Spectrograph onboard the Hubble Space Telescope, we have detected molecular hydrogen in the atmospheres of three white dwarfs with effective temperatures below 14,000 K, G29-38, GD 133 and GD 31. This discovery provides new independent constraints on the stellar temperature and surface gravity of white dwarfs.
description: 10 pages, 2 figures, 1 table, ApJL, accepted
title: Hikurangi Ocean Bottom Investigation of Tremor and Slow Slip (HOBITSS VI, TAN1907)
Creators: name: Wallace, Laura M.
name: TAN1907 Science Party
Publisher: name: GNS Science
Year: 2021

description: HOBITSS VI was a 12-day (29 October – 9 November 2019) Wellington to Wellington R/V Tangaroa voyage (TAN1907). Objectives of TAN1907 were to undertake seafloor geodetic and seismic instrument deployments, recoveries and surveys offshore of the Gisborne, Hawke’s Bay and Wairarapa coasts. The seafloor geodetic aims involve using Bottom Pressure Recorders (BPRs) to determine the cm-level vertical movement (upward or downward) of the seafloor during slow-slip events (SSEs), as well as to deploy a Wave Glider to survey two precision transponder arrays to monitor cm-level horizontal tectonic movements of the seafloor (using GPS-Acoustic techniques) near the Hikurangi Trench. We also recovered an existing seafloor transponder array offshore of Gisborne that was deployed in 2015. Ocean bottom seismometers (OBS) were recovered, and these data will be used to compare the generation of ‘fast-slip’ earthquakes with slow-slip earthquakes and will complement data coming from the BPRs and monitoring instruments installed in International Ocean Discovery Program boreholes offshore of Gisborne. Next generation seafloor instruments (developed by Lamont-Doherty Earth Observatory [LDEO]) that combine pressure and seismic sensors (POBS) were also recovered. The offshore Gisborne to Hawke’s Bay region was targeted due to the large and frequent
SSEs that occur there. Offshore Wairarapa and Hawke’s Bay have been targeted for GPS-Acoustic array deployments to determine the degree of locking near the Hikurangi Trench, which is currently not constrained.
Five BPRs belonging to Kyoto University, three BPRs and three POBS belonging to LDEO and six BPRs belonging to the University of Texas (UTIG) and GNS Science (GNS) were retrieved during the voyage. We unfortunately were unable to retrieve three additional BPRs belonging to UTIG/GNS and two BPRs belonging to LDEO; we were unable to establish communication with them, and the reasons for this are currently unknown. Five OBS belonging to the Earthquake Research Institute, University of Tokyo (ERI) were also retrieved. A Wave Glider was deployed off the Wairarapa coast at the beginning of the voyage to survey in two GPS Acoustic transponder arrays (consisting of three precision transponders per array). In all, 14 BPRs, five OBS, three POBS (with pressure and OBS) and three precision transponders were recovered (25 instrument recoveries). Most of these instruments were originally deployed in late 2018, on TAN1809, and in early 2019 with the R/V Roger Revelle (RR1903). Five BPRs belonging to Kyoto University were also deployed during the voyage. All voyage objectives underpin research funded by a Ministry for Business, Innovation & Employment Endeavour Fund programme: ‘Diagnosing peril posed by the Hikurangi subduction zone: New Zealand’s largest plate boundary fault’ (Contract C05X1605). (auth)
Geology of the nodular shale of the Middle and Upper Miocene of the western Los Angeles Basin
Creators: name: Tovell, Walter Massey
Publisher: name: California Institute of Technology
Year: 1942
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Investigations of the Geology of the Nodular Shale were carried on under the auspices of the Standard Oil Company of California. Attempts were made to arrive at some conclusions with regard to the origin of the Nodular Shale, and its relationship to the origin of Petroleum that occurs below it in several fields of the West Los Angeles Basin.

The Nodular Shale is Middle Miocene in age in the southern part of the West Los Angeles Basin, and Upper Miocene in the Northern part. It is suggested that the Nodular was laid down in seas transgressing from south to north, and that an ancestral Santa Monica Mountains formed a barrier to this transgressing sea, as evidenced by the heavy mineral content of the Nodular Shale. The Nodular Shale is folded in the areas of the Oil Fields in which it occurs, and this folding is thought to have affected the Schist surface as well. It has also been affected by faulting.

The Nodular Shale is considered to have been the source beds for most of the petroleum in the reservoir rocks that lie below it in the Playa Del Rey and El Segundo Oil Fields.

Several areas are considered to be favorable locations for new petroleum discoveries in the region studies.

It is possible that the Murray-Reynard theory for the deposition of phosphatic nodules, is applicable to the conditions that prevailed in the West Los Angeles Basin area, and that the nodules of the Nodular Shale are the result of seasonal variations of temperature in the Nodular sea, with a consequent periodic dying off of large portions of the fauna that inhabited the seas of that time.
Search for long-lived particles in events with photons and missing energy in proton-proton collisions at sqrt(s) = 7 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 inverse femtobarn sample of proton-proton collisions at sqrt(s) = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m(neutralino) > 220 GeV (for c tau < 500 mm), as well as on the proper decay length of the lightest neutralino, c tau > 6000 mm (for m(neutralino) < 150 GeV).
description: Replaced with published version. Added journal reference and DOI
The distorted axi-planar superfluid phase of $^3$He in the "nematically ordered" aerogel
Creators: name: Fomin, I. A.
name: Surovtsev, E. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Stimulated by the results of NMR experiments with superfluid $^3$He in "nematically ordered" aerogel [1] we report on the results of phenomenological analysis of stability of different phases of superfluid $^3$He subjected to a strong homogeneous uniaxial anisotropy. On a basis of this analysis we suggest a form of the order parameter for the new ESP2 phase observed in the quoted experiments. In the weak coupling limit the suggested order parameter approaches that of the axi-planar phase. We discuss a possible experimental check of the proposed identification of the new phase.
description: Some typos are corrected, journal reference is added
Break-up of Rydberg superatoms via dipole-dipole interactions
Creators: name: Möbius, Sebastian
name: Genkin, Michael
name: Wüster, Sebastian
name: Eisfeld, Alexander
name: Rost, Jan Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We investigate resonant dipole-dipole interactions between two "superatoms" of different angular momentum, consisting of two Rydberg-blockaded atom clouds where each of them carries initially a coherently shared single excitation. We demonstrate that the dipole-dipole interaction breaks up the superatoms by removing the excitations from the clouds. The dynamics is akin to an ensemble average over systems where only one atom per cloud participates in entangled motion and excitation transfer. Our findings should thus facilitate the experimental realization of adiabatic exciton transport in Rydberg systems by replacing single sites with atom clouds.
description: 10 pages, 5 figures
The evolution of HI and CIV quasar absorption line systems at 1.9 < z < 3.2
Creators: name: Kim, Tae-Sun
name: Partl, Adrian M.
name: Carswell, Robert F.
name: Müller, Volker
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have investigated the distribution and evolution of ~3100 intergalactic HI absorbers with HI column densities log N(HI) = [12.75, 17.0] at 1.9 < z < 3.2, using 18 high resolution, high S/N quasar spectra obtained from the ESO VLT/UVES archive. We used two sets of Voigt profile fitting analysis, one including all the available high-order Lyman lines to obtain reliable HI column densities of saturated lines, and another using only the Ly-alpha lines. There is no significant difference between the results from the two fits. Combining our results with literature data, the mean number density at 0 < z < 4 is not well described by a single power law and strongly suggests that its evolution slows down at z < 1.5 at the high and low column density ranges. We also divided our entire HI absorbers at 1.9 < z < 3.2 into two samples, the unenriched forest and the CIV-enriched forest, depending on whether HI lines are associated with CIV at log N(CIV) > 12.2 within a given velocity range. The entire HI column density distribution function (CDDF) can be described as the combination of these two well-characterised populations which overlap at log N(HI) ~ 15. At log N(HI) < 15, the unenriched forest dominates, showing a similar power-law distribution to the entire forest. The CIV-enriched forest dominates at log N(HI) > 15, with its distribution function proportional to N(HI)^(-1.45). However, it starts to flatten out at lower N(HI), since the enriched forest fraction decreases with decreasing N(HI). The deviation from the power law at log N(HI) = [14, 17] shown in the CDDF for the entire HI sample is a result of combining two different HI populations with a different CDDF shape. The total HI mass density relative to the critical density is Omega(HI) ~ 1.6 x 10^(-6) h^(-1), where the enriched forest accounts for ~40% of Omega(HI).
description: 26 pages, 20 figures, accepted for AA, in press
Group/Individual Psychotherapy for Pregnancy Loss Work Book
Creators: name: Satapathy, Sujata
name: Sagar, Rajesh
name: Dhara Gupta
name: Devi, Usha
name: Vatsala Dadhwal
name: Yadav, Kapil
name: Singh, Archana
name: Ishita Mehta
name: Tiwari, Shraddhesh Kumar
name: Ravleen Kaur Bakshi
Publisher: name: Zenodo
Year: 2022

description: Group/Individual Psychotherapy for Pregnancy Loss Work Book
Studies on the Use of Coulometric and Amperometric Analysis
Creators: name: Buck, Richard Pierson
Publisher: name: California Institute of Technology
Year: 1951
Subjects: Chemistry

description: A coulometric titration is described in which unipositive
thallium is oxidized to the tripositive state by electrolytically
generated bromine or chlorine. The end-point is determined
amperometrically by measuring the current between
two platinum electrodes with an impressed potential difference
of 200 millivolts. Confirmatory analyses have shown an accuracy of 0.2% for 93
to 200 microgram samples, and of 0.1%
for samples of from 200 to 1900 micrograms.

The application of dual intermediates to secondary coulometric titrations
with an amperometric end point has been studied.
Cupric copper and bromide have been used for the alternate electrolytic
generation of bromine and cuprous copper for the purpose of titrating
a substance exhibiting a slow rate of reaction with bromine.
A procedure is described by which aniline has been titrated in
quantities of from 13 to 280 micrograms with an average error without regard
to sign of less than 0.4 micrograms.

A study has been made of the bromine-bromide diffusion current,
the effects of the concentrations of bromine, bromide
and hydrogen ion; the minimum bromide ion concentration necessary
to maintain generation of bromine with 100% current efficiency was determined.

Studies have been made of the diffusion-controlled currents observed when potential
differences, less than the decomposition potential, are impressed upon two
platinized-platinum electrodes in solutions of hydrochloric acid which are 0.1 VF
in potassium chloride and saturated with hydrogen gas. The effects of the
electrode size and material, the applied potential, and the presence of
oxygen and nitrogen gas are described.
Buckling of thermoviscoelastic structures under temporal and spatial temperature variation
Creators: name: Tsuyuki, Richard M.
Publisher: name: California Institute of Technology
Year: 1993
Subjects: viscoelastic in-plane loaded structure
Aeronautics
lateral instability
temperature variation

description: The problem of lateral instability of a viscoelastic in-plane loaded structure is considered in terms of thermorheologically simple materials. As an example of a generally in-plane loaded structure, we examine the simple column under axial load: Both cyclic loading is considered (with constant or in-phase variable temperature excursions) as well as the case of constant load in the presence of thermal gradients through the thickness of the structure.
The latter case involves a continuous movement of the neutral axis from the center to the colder side and then back to the center.

In both cases, one finds that temperature has a very strong effect on the rate at which instabilities evolve, and under in-phase thermal cycling the critical loads are reduced compared to those at constant (elevated) temperatures. The primary effect of thermal gradients beyond that of thermally-induced rate accelerations is a rate increase occasioned by the generation of an "initial imperfection" or "structural bowing." This latter effect, which is proportional to both the temperature gradient and the coefficient of thermal expansion (presumed homogeneous in this study), can in fact be dominant. Because the coefficient of thermal expansion tends to be large for many polymeric materials, it may be necessary to take special care in lay-up design of composite structures intended for use under compressive loads in high-temperature applications. Finally, the implications for the temperature
sensitivities of composites to micro-instability (fiber crimping) are also apparent from the results delineated here.
Synthetic and structural studies of ruthenium complexes as DNA major groove binders
Creators: name: Prieto Otoya, Tayler D.
name: McQuaid, Kane
name: Peterson, Neil G.
name: Cardin, David J.
name: Menounou, Georgia
name: Kellett, Andrew
name: Cardin, Christine J.
Publisher: name: Zenodo
Year: 2023

description: Our crystal structure provides the first crystallographic evidence that a ruthenium polypyridyl complex can bind in the DNA major groove.
title: Polyamide Kitchen Utensils: Keep contact with hot food as brief as possible: BfR Opinion No 036/2019 of 17 September 2019
Creators: name: Bundesinstitut Für Risikobewertung
Publisher: name: Bundesbehörden und Einrichtungen im Geschäftsbereich des Bundesministeriums für Ernährung und Landwirtschaft (BMEL)
Year: 2019
Subjects: subject: 000

description: BfR-Stellungnahmen, vol. 2019, no. 036
The effect of surface roughness upon 25 st aluminum alloy subjected to repeated tensile stresses above the proportional limit
Creators: name: Ringness, William M.
Publisher: name: California Institute of Technology
Year: 1949
Subjects: Aeronautics

description: Utilizing the Repeated Load Hydraulic Testing Machine at the Daniel Guggenheim Aeronautical Laboratory, California Institute of Technology, Pasadena, California, the author, in collaboration with Lt. Comdr. D. J. Hardy, U. S. Navy, investigated the effects of surface roughness upon the cyclic life of 25 ST aluminum alloy when subjected to repeated constant tensile stresses in the region above the proportional limit.

The stress impulses are of such low frequency as to allow consideration of single impulses. The rate of build-up of the impulse and the duration of the impulsive load are such as to create an equivalent static load of substantially the same magnitude as the peak of the impulse loading.

It was found that surface roughness has some effect upon the cyclic life. In the lower stress regions, the greater the degree of surface roughness, the shorter the life appears to be. However, for the range of roughness investigated, 5μ to 200μ, the effect is not so pronounced as is usually found below the proportional limit.

Where the applied stresses reached far up into the plastic range the effect of surface roughness does not seem to follow quite as specific a pattern. Since the loading impulse featured a 0.33 second duration of maximum load, the effects of creep may well have taken over in shaping the life cycle curve with little regard for surface roughness.
Theoretical solutions for the jet flap diffuser
Creators: name: Morel, Jean-Pierre Georges
Publisher: name: California Institute of Technology
Year: 1969
Subjects: Aeronautics

description: This study proposes a jet sheet as an alternative to a rigid diffuser for a momentum propulsor. This appears attractive technically. The diffuser shape can be tailored by modulating jet momentum and angle and can be switched off in forward flight since its main function is increasing thrust/power ratio at static speeds. Theoretical analysis for a steady inviscid incompressible flow predicts impressive thrust augmentations. Taking into account the energy required to feed the jet sheet, it appears that in some cases propulsor thrust can be more than doubled. It could be applied to ducted fans, jet engines and seems particularly attractive for ejector thrust systems.

A first approach of the study of the flow is made in the planar and axisymmetric cases by assuming that the velocity is uniform in each section. For the planar problem a linearized solution is presented. A conformal mapping transforms it into a half-plane boundary value problem of the Riemann-Hilbert-Poincare type. It is solved by combining Filbert Transforms, asymptotic expansion and a digital computer program. Then the nonlinear two-dimensional problem is presented with some references to the way it could be solved.
Estimation Problems in Sense and Respond Systems
Creators: name: Capponi, Agostino
Publisher: name: California Institute of Technology
Year: 2006
Subjects: estimation
filtering
distributed systems
Computer Science

description: In this thesis we study problems arising in the design of sense and respond systems and present analytical solutions to them as well as results from experiments dealing with real systems. Sense and respond systems employ sensors and other sources of data to sense what is happening in their environments, process the obtained information, and respond appropriately. A goal of the processing stage is to reconstruct the best possible estimate of the state of the environment using messages received from sensors. Due to the large number of messages that need to be processed, it is desirable to have algorithms that can incrementally process the received measurements and recover the state. The state estimation process becomes more problematic if measurements obtained from the sensors are noisy or they are sent at unpredictable times. First, we study models of state estimation and present algorithms that can incrementally compute accurate linear state estimates of the surrounding environment. Second, we define a framework called predicate signaling that allows us to make tradeoffs between message generation rates and the quality of the state estimate through specification of suitable predicates. We show how predicate signaling generalizes commonly used signaling schemes and present a detailed analysis based on stochastic processes to evaluate schemes based on predicate signaling.
Laboratory Math
Creators: name: Beyer, Andrea
name: Connerly, Pamela
name: Fillman, Christy
name: Peters, Nick
Publisher: name: QUBES Educational Resources
Year: 2021

description: Explanations and demonstrations on how to use mathematical equations for various laboratory purposes, including those specific to SEA-PHAGES (such as phage titer calculations) and those that are used universally in most scientific settings.