Design and construction of earth dams.

This thesis deals with the design and construction of rolled-fill earth dams with the standard methods of practice, taking the Hirakud Dam as the basis. The field operations of the investigation to obtain observational information and to secure samples for the laboratory testing include observation of rain gauge and river gauge readings, taking river water samples, digging test pits, drilling grout holes, opening drifts, digging borrow pits and conducting detailed topographical surveys. Laboratory tests are conducted on the samples and the results are plotted in graphs. Rainfall and run-off statistics are plotted in graphs. Observational information of geology is plotted in log sheets and the field data of survey works is made use of for the preparation of the topographical maps. From the results of the investigation it is found that the Hirakud Dam has a firm foundation and there is sufficient quantity of material for the embankment at site. The annual rainfall is 47.49 inches yielding a run-off of 50 million sore feet over a catchment area of 32,200 square miles. The stability of the embankment is computed by the slip circle method and the seepage water from the flow net method. The dam is designed for 100 years with a reservoir capacity of 5.98 million acre feet at the maximum water level elevation 625 feet, the bed level being elevation 500 feet. The dead storage is 2.24 million acre feet corresponding to elevation 590 feet, and the maximum submerged area corresponding elevation 625 feet is 150,380 acres. The minimum factor of safety for the upstream slope is 1.68 and that for the downstream slope is 1.19. The seepage water is 0.264 cubic feet per lineal foot per year. The dam is to be constructed as per the design and the specifications. The compaction is attained by the mechanical effort at the optimum moisture content. The mechanical effort is influenced by the type of roller, its weight and the number of passes. Field control is affected by vigilant supervision, needle penetration, ring test and sand test. The construction is to be carried out according to a plan of seven stages. A comparison and contrast is drawn between the U.S.A. and India to bring out the inherent difficulties of construction operations of large dams in India. Importance is given to the sequence of the subject matter since no text book gives all the relevant portions as used in practice. Reference is given to the text books from which the formulas are taken so that a student who is interested in theory, derivation and explanation of the formulas may study the available literature. The procedures employed and the conclusions drawn are based on the experience, observation and the research study of the author both in India and the United States of America

Homing Pigeons Only Navigate in Air with Intact Environmental Odours: A Test of the Olfactory Activation Hypothesis with GPS Data Loggers

A large body of evidence has shown that anosmic pigeons are impaired in their navigation. However, the role of odours in navigation is still subject to debate. While according to the olfactory navigation hypothesis homing pigeons possess a navigational map based on the distribution of environmental odours, the olfactory activation hypothesis proposes that odour perception is only needed to activate a navigational mechanism based on cues of another nature. Here we tested experimentally whether the perception of artificial odours is sufficient to allow pigeons to navigate, as expected from the olfactory activation hypothesis. We transported three groups of pigeons in air-tight containers to release sites 53 and 61 km from home in three different olfactory conditions. The Control group received natural environmental air; both the Pure Air and the Artificial Odour groups received pure air filtered through an active charcoal filter. Only the Artificial Odour group received additional puffs of artificial odours until release. We then released pigeons while recording their tracks with 1 Hz GPS data loggers. We also followed non-homing pigeons using an aerial data readout to a Cessna plane, allowing, for the first time, the tracking of non-homing homing pigeons. Within the first hour after release, the pigeons in both the Artificial Odour and the Pure Air group (receiving no environmental odours) showed impaired navigational performances at each release site. Our data provide evidence against an activation role of odours in navigation, and document that pigeons only navigate well when they perceive environmental odours

Clinical, electrodiagnostic findings and quality of life of dogs and cats with brachial plexus injury

Brachial plexus injury (BPI) represents a common consequence of road traffic accidents in humans and small animals. In humans, neuropathic pain is a common symptom after BPI. The aim of the study was to describe the clinical signs, the electrodiagnostic findings, the outcome and the quality of life (QoL) of a cohort of dogs and cats with BPI. Clinical records of 40 dogs and 26 cats with BPI were retrospectively reviewed. Specific attention was put on the evaluation of electrodiagnostic findings (35/40 dogs; 14/26 cats) and telephonic interview results (26/40 dogs; 18/26 cats). The most common neurological condition was the inability to bear weight and sensory deficits on the affected limb. Radial and ulnar motor nerve conduction studies (MNCSs) were absent respectively in 47% (radial) and 62% (ulnar) of dogs and 57% (radial) and 57% (ulnar) of cats. The absence of radial (p = 0.003) and ulnar (p = 0.007) MNCSs in dogs and ulnar MNCSs in cats (p = 0.02) was significantly associated to the amputation of the affected limb. The owners described signs of pain/discomfort in 73% of dogs and 56% of cats. This is the first report suggesting that neuropathic pain/discomfort should be adequately considered in order to improve the QoL

Reduction of hydraulic losses in a piston pump

The hydraulic losses are the decrease in energy of the fluid due to vortex formation, friction between the fluid and the pipe, changing the flow of fluid. The decrease in energy of the fluid, in turn, leads to the following consequences: decrease efficiency, increase energy consumption and decrease cavitation stock pump. The main danger in a piston pump is to reduce cavitation stock. This leads to boiling of water by pressure reduction and rapid destruction the flow part of the pump

Characterization of the ablation zones produced by three commercially available systems from a single vendor for radiofrequency thermoablation in an ex vivo swine liver model

Background: Radiofrequency Ablation (RFA) is rarely performed in veterinary medicine. A rationale exists for its use in selected cases of canine liver tumours. RFA induces ablation zones of variable size and geometry depending on the technique used and on the impedance of the targeted organ. Objectives: (a) to describe the geometry and reproducibility of the ablation zones produced by three commercially available systems from a single company, using isolated swine liver parenchyma as a model for future veterinary applications in vivo; (b) to study the effects of local saline perfusion into the ablated parenchyma through the electrode tip and of single versus double passage of the electrode on size, geometry and reproducibility of the ablation zones produced. Methods: Size, and geometry of ablation zones reproduced in six livers with one cooled and perfused (saline) and two cooled and non-perfused systems, after single or double passage (n = 6/condition), were assessed macroscopically on digitalized images by a blinded operator. Longitudinal and transverse diameters, equivalent diameter, estimated volume and roundness index were measured. Reproducibility was assessed as coefficient of variation. Results and Conclusions: Ablation zone reproducibility was higher when expressed in terms of ablation zone diameters than estimated volume. Local saline perfusion of the parenchyma through the electrode tip during RFA increased the ablation zone longitudinal diameter. Ablation zone estimated volume increased with saline perfusion only when double passage was performed. These data may provide useful information for those clinicians who intend to include RFA as an additive tool in veterinary interventional radiology

Post-operative computed tomography imaging evaluation of ascending aorta surgery

Ascending thoracic aorta disease is often a life-threatening condition. Aortic aneurysm and aortic dissection are the most frequent ascending aorta diseases requiring surgical intervention. Surgical repair techniques of the ascending aorta are various; they include reconstruction of the ascending aorta by using a graft with or without a prosthetic valve, reconstruction with a composite artificial graft or using a biological graft, and reconstruction of the ascending aorta with a composite graft preserving the native valve and arch repair. The radiologist plays a key role in the identification of post-operative complications; differentiation from normal postoperative findings is fundamental. Our aim is to discuss the main diseases affecting the ascending aorta requiring surgery and the different techniques used to treat them. We also discuss the normal computed tomography (CT) imaging findings and after-surgery complications

La valutazione delle performance nelle pubbliche amministrazioni nella prospettiva del valore pubblico

premessa la necessità di individuare vie di semplificazione delle performance organizzative ed individuali, l’articolo intende esplorare la possibilità di individuare nuove frontiere di valutazione della performance che integrino, connettano e finalizzino le due citate, avvalendosi di modalità di misurazione che leggano insieme le diverse dimensioni di performance. Ne scaturiscono le due seguenti Research Question: RQ1) quali potrebbero essere le nuove frontiere della valutazione delle performance? RQ2) come si potrebbero misurare le nuove frontiere della valutazione delle performance? Per dare risposta alla RQ1): • ai fini della costruzione del quadro teorico di riferimento, nel paragrafo 2 si analizzeranno, con approccio deduttivo, alcuni contributi scientifici di matrice tradizionale (New Public Management o NPM) e con approccio evoluto (Public Performance Management and Measurement o PPMM; Public Value Management and Measurement o PVMM), sul tema dei sistemi di Programmazione, Controllo e Valutazione (PCV) delle performance delle PA, con focus sui contenuti oggettivi. Per completezza si farà riferimento al contesto normativo in divenire, scaturente dalla Riforma Madia; • nel paragrafo 3 si proverà a ridisegnare la catena di PCV delle performance, e quindi le frontiere della valutazione, sulla base di cinque linee: a) Semplificare il processo e gli strumenti di PCV delle performance individuali e b) organizzative. c) Introdurre le performance istituzionali, d) creando un link bidirezionale tra i 3 livelli delle performance (istituzionale, organizzativo, individuale), e) rendendo utili le prime con la ricerca del VP. . Per dare risposta alla RQ2): • nel paragrafo 4, facendo leva sulla letteratura PVMM, si ragionerà intorno alle possibili modalità di misurazione disgiunta delle diverse dimensioni (sociale, economica, intangibile) delle performance organizzative e istituzionali e sulla misurazione congiunta di queste ultime attraverso un indice sintetico del Valore Pubblico (VP) che consenta di governare sinergicamente i processi per la sua creazione. Attraverso la proposta di un originale modello multidimensionale si normalizzeranno le diverse misure mediante un indice di meta-performance (o del VP); • nel paragrafo 5 si analizzerà, con un approccio induttivo di action research, il caso studio del Comune di Ferrara, con particolare riferimento alla politica istituzionale di miglioramento dell’offerta turistico-culturale, nel biennio 2013-2014. Tale caso verrà affrontato in chiave istituzionalista (DiMaggio e Powell, 1983), mettendo in luce i cambiamenti comportamentali osservati; • nel paragrafo 6 si discuterà intorno ai risultati emersi dal case study; • Infine, verranno delineati possibili sviluppi della ricerca

Weak formulation for singular diffusion equation with dynamic boundary condition

In this paper, we propose a weak formulation of the singular diffusion equation subject to the dynamic boundary condition. The weak formulation is based on a reformulation method by an evolution equation including the subdifferential of a governing convex energy. Under suitable assumptions, the principal results of this study are stated in forms of Main Theorems A and B, which are respectively to verify: the adequacy of the weak formulation; the common property between the weak solutions and those in regular problems of standard PDEs.Comment: 23 page

Accounting for Power and Resistance: the University of Ferrara under the Fascist Regime in Italy

Recognising the dynamic character of the exercise of power, this study analyses the complex interplay between power and resistance, as conceived by Foucault, after the Italian Fascists sought to subjugate all Italian universities. When the University of Ferrara, a ‘Free University’, resisted the government’s intentions, which would also have meant restricting access to higher education to working class youth, accounting practices became essential in providing justification for the government’s actions. In response, the University was forced to use accounting practices as its main form of defence. This resulted in the government having to use different tactics to achieve its final goals. If resistance is met by governments in the implementation of their programmes this may require a shift in the tactics originally employed to achieve the planned outcomes. Greater demands were placed on the funders of the University and changes were made to how the University’s performance was represented, interpreted and evaluated by the means of accounting practices. In the power struggle, accounting played different roles in the service of conflicting objectives, ranging from concealing the interested nature of political action, demonstrating the achievement of financial stability and self-sufficiency, providing legitimacy or ensuring the use of resources consistent with the aims of those who exercised power. So persuasive was the action enabled by accounting information that the State was finally able to gain control of the University without making it a ‘Kingdom University’, and hence seeming to preserve the appearance of independence almost until the end of the Fascist regime