Book receipt of John Mellen and William Bentley, 1780 June 16

This half-page slip contains receipts for two Harvard College Library books received by Harvard College Tutors John Mellen (1752-1828; Harvard AB 1770) and William Bentley (1759-1819; Harvard AB 1777).

Question suggested by President Joseph Willard, [1790]

One slip of paper containing a handwritten question in the hand of President Joseph Willard. The question is on the verso of a note dated March 2, 1790.

Suggested subjects, [1819]

One slip of paper containing handwritten subjects in an unidentified hand. The verso contains a June 16, 1819 note from President Kirkland to the Harvard Librarian.

[Repairs and occasional expenses calculations, 1801]

Slip of paper with calculations for unidentified "repairs" and "occasional expenses" between 1796 and 1801.

[Book list, ca. 1800]

Slip of paper containing a short list of recipients for an unidentified book including "each College in the U.S.," "each incorporated Academy in Massachusetts," and prominent Massachusetts leaders. The list was probably created between 1800 and 1807.

Mr. Monis's receipt, 1728 June 19

Slip of paper containing a receipt signed by Judah Monis to Treasurer Edward Hutchinson for "the charge in printing a specimen of the Hebrew Grammar."

About Mr. Monis's being taxed, 1731 December 21

Small slip of paper containing a handwritten statement signed by President Benjamin Wadsworth, Tutor Henry Flynt, Professor Edward Wigglesworth, and Tutor Nathan Prince declaring that Judah Monis as the Hebrew instructor should receive the tax exemptions granted to College officers and providing suggestions to claim the exemption.

Order for the salary of Judah Monis, 1725 October 21

Small slip of paper containing an order from President Benjamin Wadsworth to Treasurer Edward Hutchinson to pay Judah Monis's salary for half of one year.

Library catalogue notes of Isaac Smith, ca. 1789

Thirteen slips of paper with fragments of handwritten alphabetical lists created by Isaac Smith presumably in his capacity as Harvard Librarian. Most of the entries are surnames or single-word subjects. For example, one slip with "M" entries includes: milway, miracles, miraculous, Mitchell, and Mitchell. Some of the lists have struck-through words or have entries annotated with numbers and the abbreviations "o" and "bk." The verso of one leaf has a brief, undated note regarding the transfer of books between Mr. Hilliard and Mr. Smith.

[ Fetâvâ] : manuscript, 1132 [ca. 1720 C.E.]

A typical fatwa collection covering almost all aspects of law: prayers, ablution, alms, fasting, divorce, capital punishment, etc.

Salāt-i Masʻūdī : manuscript, 1298-1299 [i.e. 1881-1882]

A manuscript treatise on prayer, ablution, alms, fasting, divorce, etc. The first volume opens with a chapter on "Tawḥīd", i.e. Islamic theology. This is followed by a chapter on Abū Ḥanīfah and his school of law.

Valutazione sperimentale degli effetti della pressione d'iniezione dell'AdBlue sull'efficienza di abbattimento degli NOx nei sistemi SCR

In questo lavoro vengono indagati i benefici dell’aumento della pressione d’iniezione dell’AdBlue nei sistemi SCR. Dopo aver esposto le ipotesi teoriche a supporto della tesi, si passa all’allestimento del veicolo dimostrativo impiegato per l’attività sperimentale. In questa fase viene illustrato tutto il processo di preparazione, che comprende: la messa a punto del circuito idraulico, la caratterizzazione degli iniettori impiegati, la strumentazione della linea di scarico, e il software INCA impiegato per il comando delle centraline. Dopodiché vengono descritti nel dettaglio i test, condotti con il veicolo sperimentale, sul banco a rulli. Attraverso le prove, eseguite su due differenti punti motore, si è potuto dimostrare l’effettivo aumento di efficienza di abbattimento degli NOx, da parte del sistema SCR, all’aumentare della pressione d’iniezione dell’AdBlue. Inoltre si hanno effetti positivi anche in merito al fenomeno dell’ammonia slip, che viene sensibilmente ridotto ai livelli di pressione più alti.

Tecniche GPS/INS per l'anilisi dinamica di un ciclomotore

Nel seguente elaborato si espone l’utilizzo del sistema GPS/INS per la valutazione del moto di un ciclomotore. Tale sistema è composto da sensori GPS ( Global Navigation System ) per la misurazione della posizione, e da sensori INS ( Inertial Navigation System) per la misurazione dell’accelerazione e delle velocità angolari rispetto a tre assi coordinati. Chiaramente le misure di accelerazioni e di velocità angolari da parte dei sensori, presentano dei minimi errori, che però si ripercuotono sul posizionamento finale. Per limitare questo fenomeno e rendere la misura di velocità e posizione utilizzabile, un filtro di Kalman viene impiegato per correggere il risultato dell'integrazione usando le misurazioni del GPS. Il connubio tra il sistema INS e il sistema GPS è molto efficacie anche quando si ha una assenza di ricezione satellitare o perdita parziale dei satelliti (cycle slip). Infine è stato utilizzato uno smartphone sfruttando i sensori in esso presenti : accelerometri, giroscopi, GPS, per analizzare la dinamica di un ciclomotore, concentrandosi sull’assetto in particolar modo l’angolo di rollio. Tale prova è stata affrontata non tanto per validare il sistema GPS/INS, ma per provare una soluzione comoda e di basso costo per analizzare il moto di un ciclomotore.

On the initiation of boudinage and folding instabilities in layered elasto-visco-plastic solids - Insights from natural microstructures and numerical simulations

The present understanding of the initiation of boudinage and folding structures is based on viscosity contrasts and stress exponents, considering an intrinsically unstable state of the layer. The criterion of localization is believed to be prescribed by geometry-material interactions, which are often encountered in natural structures. An alternative localization phenomenon has been established for ductile materials, in which instability emerges for critical material parameters and loading rates from homogeneous conditions. In this thesis, conditions are sought under which this type of instability prevails and whether localization in geological materials necessarily requires a trigger by geometric imperfections. The relevance of critical deformation conditions, material parameters and the spatial configuration of instabilities are discussed in a geological context. In order to analyze boudinage geometries, a numerical eigenmode analysis is introduced. This method allows determining natural frequencies and wavelengths of a structure and inducing perturbations on these frequencies. In the subsequent coupled thermo-mechanical simulations, using a grain size evolution and end-member flow laws, localization emerges when material softening through grain size sensitive viscous creep sets in. Pinch-and-swell structures evolve along slip lines through a positive feedback between the matrix response and material bifurcations inside the layer, independent from the mesh-discretization length scale. Since boudinage and folding are considered to express the same general instability, both structures should arise independently of the sign of the loading conditions and for identical material parameters. To this end, the link between material to energy instabilities is approached by means of bifurcation analyses of the field equations and finite element simulations of the coupled system of equations. Boudinage and folding structures develop at the same critical energy threshold, where dissipative work by temperature-sensitive creep overcomes the diffusive capacity of the layer. This finding provides basis for a unified theory for strain localization in layered ductile materials. The numerical simulations are compared to natural pinch-and-swell microstructures, tracing the adaption of grain sizes, textures and creep mechanisms in calcite veins. The switch from dislocation to diffusion creep relates to strain-rate weakening, which is induced by dissipated heat from grain size reduction, and marks the onset of continuous necking. The time-dependent sequence uncovers multiple steady states at different time intervals. Microstructurally and mechanically stable conditions are finally expressed in the pinch-and-swell end members. The major outcome of this study is that boudinage and folding can be described as the same coupled energy-mechanical bifurcation, or as one critical energy attractor. This finding allows the derivation of critical deformation conditions and fundamental material parameters directly from localized structures in the field.

Structural features in ODP Holes 128-794D and 128-799B

Numerous structural features occur in the Leg 128 cores from the Japan Sea. They include (1) gravity-induced structures such as slump folds, (2) dewatering structures comprising several sets of veins, and (3) larger faults and veins developed in the volcanic basement of the Yamato Basin as well as in the sedimentary rocks of the Oki Ridge and Kita-Yamato Trough. Gravity-induced structures, mainly slumps and associated faults, suggest the existence of paleoslopes and the dominance of gravitational tectonics during the early and middle Miocene, at the Pliocene/Pleistocene boundary, and during the Quaternary. Several types of mud-filled veins having various shapes were observed. These are especially abundant in the middle Miocene siliceous claystones and porcellanites from the Kita-Yamato Trough. They have been interpreted as dewatering conduits that formed preferentially in highly porous, water-saturated diatomaceous muds on a slope, because of episodic loss of sediment strength, collapse of the sediment framework, and consequent fluid migration. The central part of the vein serves once as a fluid conduit, whereas the transition between conduit-controlled and intergranular flow occurs at the branching extremities, with concentration of fines. The likely trigger responsible for the strength loss is seismic activity. Development of these veins, spatially and chronologically linked to small normal microfaults, implies an extensional regime having layer-parallel extension and a local bedding-parallel shear couple, probably the result of gravitational gliding. The brittle fractures found in Yamato Basin basement Hole 794D cores comprise joints, faults, and veins filled with chlorite-saponite, saponite, and calcite. They suggest a likely transpressive to transtensional regime around the early Miocene/ middle Miocene boundary, with a north-northeast-south-southwest compression alternating with a west-northwest-eastsoutheast extension. The faults from Site 799 cores on the Yamato Rise exhibit a prominent early Miocene-middle Miocene extensional environment, a late Miocene-early Pliocene phase of normal and strike-slip faulting, and a final phase that began during the latest Pliocene. Site 798, on the Oki Ridge, reveals faults that recorded a consistent extensional tectonic regime from Pliocene to the Holocene. These data support the pull-apart kinematic model for early Miocene-middle Miocene time, as regarding the stress regime deduced from the Yamato Basin basement fractures. The recent compression known in the eastern margin of the Japan Sea was not documented by compressive structures at any site. The late Miocene-early Pliocene faulting phase corresponds to a major and general reorganization of the stress distribution in the arc area. Evidence for rapid and main subsidence and synsedimentary extension of the Yamato Basin and Yamato Rise areas between 20 and 15 Ma, and the concomitant rotation of southwest Japan, raise the question of links between this opening and the Shimanto Belt collision in southwest Japan, between the arc and the Philippine Sea Plate.