1,185 research outputs found

    Il drafting nelle autonomie locali La qualità degli atti normativi e amministrativi

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    Questa tesi propone l'obiettivo di trattare il tema del drafting in riferimento alle autonomie territoriali. L'applicazione di regole di tecnica legislativa risulta rilevante anche a livello locale, per ottenere atti normativi e amministrativi di qualità. Il nostro Paese sta affrontando profondi cambiamenti istituzionali che coinvolgono anche le autonomie territoriali, come lo è stato il tentativo dell'ultima riforma costituzionale proposta dal Governo Renzi, nonostante si sia conclusa con esito negativo a seguito del referendum costituzionale del 4 dicembre 2016. In questo contesto emerge l'importanza della comunicazione pubblica, del cammino verso gli obiettivi della semplificazione e della trasparenza dell'attività amministrativa dell'amministrazione pubblica. La comunicazione pubblica ruota intorno al tema del drafting, uno strumento utile per mettere in comunicazione istituzioni e cittadini, attraverso un linguaggio più chiaro e comprensibile. A sostegno di quanto affermato nella tesi, vengono analizzate le regole per la redazione degli atti e provvedimenti amministrativi degli enti locali, corredati da alcuni schemi, mettendone in risalto l'aspetto qualitativo e quello comunicativo

    Artroplastia total no cementada en la coxartrosis secundaria a displasia y luxación congenita de cadera

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    Se revisan 13 prótesis no cementadas implantadas en 12 paciente s que presentaban una coxartrosis secundaria a una displasia congénita de cadera. Los paciente s han sido seguidos más de 2 años de evolución. En todos los casos se utilizó la via de abordaje postero-lateral. Se implantó siempre la prótesis tipo PCA procediéndose en 7 casos a la realización, a nivel acetabular, de un alo o autoinjerto complementario. A nivel femoral se utilizaron 7 vástagos estándar, 3 medianos y 3 largos para facilitar la restauración del centro rotatorio original de la cadera. En los pacientes que presentaban una luxación importante se llevaron a cabo osteotomías de acortamiento a nivel subtrocantérico. Los pacientes han sido evaluados pre y post-operatoriamente tanto desde el punto de vista radiográfico como clínico. Desde el punto de vista clínico, se obtuvieron 8 resultados excelentes, 3 buenos, 1 discreto y 1 malo. Todos los pacientes estaban plenamente satisfechos con el resultado de la operación habiendo aumentado drásticamente su nivel de actividad. Solamente en un caso fue necesario practicar una intervención de revisión a los 4 años de la artroplastia primitiva, a causa de una grave osificación periprotésica. Solamente se tuvo una complicación intraoperatoria consistente en una fractura de la diálisis femoral.Thirteen non-cemented hips prostheses implanted in 12 patients with an osteoartritis secundar y to congenita l dislocation and dysplasi a of the hip wer e reviewed . Patients had a more than 2 years follow-up. The postero-lateral surgical approach was employed in all cases. On the acetabular side, we always used the PCA socket type. On the femoral side we implanted a PCA standard stem in 7 cases, mid stem in 3 cases and a long stem in 3. Acetabular bone autograft was added in 7 patients. In order to restore the original center of rotacion of the hip, in patients with a severe dislocation we perfomed also a shortening sub-trochanteric osteotomy; all the patients wer e evaluated pre and post-operatively with two separate forms. The first regarding the clinical evaluation, the second for radiographic assessment. All the patients were fully satisfied with the operation increasing dramatically their activity level. We obtained 8 excellent results, 3 good, 1 fair and 1 poor. One case required a revision for a severe heterotopic bone formation about 4 years after the first implant. We had a diaphyseal femoral fracture as the sole inly an intraoperative complication

    U and Th content in the Central Apennines continental crust: a contribution to the determination of the geo-neutrinos flux at LNGS

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    The regional contribution to the geo-neutrino signal at Gran Sasso National Laboratory (LNGS) was determined based on a detailed geological, geochemical and geophysical study of the region. U and Th abundances of more than 50 samples representative of the main lithotypes belonging to the Mesozoic and Cenozoic sedimentary cover were analyzed. Sedimentary rocks were grouped into four main "Reservoirs" based on similar paleogeographic conditions and mineralogy. Basement rocks do not outcrop in the area. Thus U and Th in the Upper and Lower Crust of Valsugana and Ivrea-Verbano areas were analyzed. Based on geological and geophysical properties, relative abundances of the various reservoirs were calculated and used to obtain the weighted U and Th abundances for each of the three geological layers (Sedimentary Cover, Upper and Lower Crust). Using the available seismic profile as well as the stratigraphic records from a number of exploration wells, a 3D modelling was developed over an area of 2^{\circ}x2^{\circ} down to the Moho depth, for a total volume of about 1.2x10^6 km^3. This model allowed us to determine the volume of the various geological layers and eventually integrate the Th and U contents of the whole crust beneath LNGS. On this base the local contribution to the geo-neutrino flux (S) was calculated and added to the contribution given by the rest of the world, yielding a Refined Reference Model prediction for the geo-neutrino signal in the Borexino detector at LNGS: S(U) = (28.7 \pm 3.9) TNU and S(Th) = (7.5 \pm 1.0) TNU. An excess over the total flux of about 4 TNU was previously obtained by Mantovani et al. (2004) who calculated, based on general worldwide assumptions, a signal of 40.5 TNU. The considerable thickness of the sedimentary rocks, almost predominantly represented by U- and Th- poor carbonatic rocks in the area near LNGS, is responsible for this difference.Comment: 45 pages, 5 figures, 12 tables; accepted for publication in GC

    Foreign Tourists Arrival Forecasting at Major Airports in Indonesia:

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    Purpose: This research purports to forecast the number of foreign tourists arriving at major airport in Indonesia. The airports chosen are Soekarno Hatta, Juanda, I Gusti Ngurah Rai, and Kualanamu international airports. Design/methodology/approach: The data used were foreign tourists arrival at major airports located in Jakarta, Surabaya, Medan, and Denpasar. The data extended from January 2014 until December 2018. Two time-series methods were employed, namely Holt-Winter Seasonality and Exponential Smoothing with maximum likelihood. The forecasts would reveal the fitted numbers of foreign tourists arriving from January 2019 until December 2019. The fitted numbers would then be compared to the actual numbers of January 2019 to December 2019. Findings: The results showed that, overall, Holt-Winters seasonality excel at forecasting foreign tourists arrival at Soekarno Hatta and Juanda international airports. While Exponential Smoothing perform better for prediction at I Gusti Ngurah Rai and Kualanamu international airports. The MAPE for Holt-Winters at Soekarno Hatta and Juanda international airports were 26.1585% and 14.538%. The MAPE for Exponential Smoothing at at I Gusti Ngurah Rai and Kualanamu international airports were 7.76% and 15.6791%. Research limitations/implications: Forecasting for foreign tourist arrival at Soekarno Hatta and Juanda international airports should employ Holt-Winters approach. Forecasting for foreign tourists arrival at I Gusti Ngurah Rai and Kualanamu international airports should employ Exponential Smoothing with maximum likelihood. Practical implications: Certain forecasting methods work better than the others at certain international airports. Many forercasting methods are available. Two methods are specifically prominent for detecting seasonality and trend, i.e Holt-Winters and Exponential Smoothing with maximum likelihood. Originality/value: Most research focus on one method at a time. This research compares two methods so that we can know better which method is suitable for certain airports. Four international airports are sampled in this study. Not many research focus on several places at a time. Paper type: Research pape

    Modeling the returns volatility of Indonesian stock indices: The case of SRI-KEHATI and LQ45

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    The purpose of this research is to model the volatility of Stock Indices in Indonesian capital market. This research focuses on two stock indices namely SRI-KEHATI and LQ45. SRI_KEHATI is a stock index that consists of companies whose operations are sustainable and environmentally friendly. This stock index is also known as “green index†due to its environment and sustainability concern. This is the novelty of this research that fills in the gap in the literature in which not much known regarding this green index. As the comparison, LQ45 stock index was modeled. The data used in this model were daily returns data of both index. The research period extended from 2 January 2019 to 1 November 2021. The research employed four models i.e. ARCH (1), ARCH (2), GARCH (1,1) and GJR-GARCH (1,1) for both indices returns. The ARCH and GARCH model were employed to capture the conditional variance of the indices return, while GJR-GARCH was specifically chosen to investigate whether there exists asymmetric effect in which return reacts more to bad news than good news. Akaike Information Criterion (AIC) and Schwarz Information Criterion (SIC) were chosen as the parameters for choosing the best models. Data analysis showed that GJR-GARCH was the best model for modeling the returns volatility of SRI-KEHATI and LQ45. This model was able to capture the essential property of asymmetric effect present in both models. The second best model was ARCH (2). Apparently, returns variance of Indonesian stock indices are affected more by lagged residuals. The limitation of this research lies in its research period that covered both pre-pandemic and post-pandemic period. Stock market behavior might be very different between these two periods. Future research may endeavor to investigate how the volatility of stock differs between pre-pandemic and post-pandemic period

    Investigation of failures in Irish raised bogs

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    This paper presents the results of field geophysical testing and laboratory testing of peat from Carn Park and Roosky raised bogs in the Irish Midlands. The motivation for the work was highlight the importance of these areas and to begin to attempt to understand the reasons for the failure of the bogs despite them having surface slopes of some 1°. It was found that the peat is typical of that of Irish raised bogs being up to 8m thick towards the “high” dome of the bogs. The peat is characterised by low density, high water content, high organic content, low undrained shear strength and high compressibility. The peat is also relatively permeable at in situ stress. Geophysical electrical resistivity tomography and ground penetrating radar data shows a clear thinning of the peat in the area of the failures corresponding to a reduction in volume from dewatering by edge drains/peat harvesting. This finding is supported by detailed water content measurements. It was also shown that the peat base topography is relatively flat and indicates that the observed surface movement has come from within the peat rather than from the material below the peat. Potential causes of the failures include conventional slope instability, the effect of seepage forces or the release of built-up gas in the peat mass. Further measurements are required in order to study these in more detail

    Foreign exchange volatility modeling of Southeast Asian major economies

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    This study investigates the exchange rate volatility model in Southeast Asian countries. The countries selected were Indonesia, Malaysia, Thailand, The Philippines, Vietnam, and Singapore. This study aims to model the volatility of the regional currency exchange rate against the international currency, i.e., the US Dollar. The period covered in this study extended from 1 January 2013 until 31 July 2019. These were the daily exchange rates of 7 currencies of Southeast Asian countries. The currency involved were Indonesian Rupiah (IDR), Malaysian Ringgit (MYR), Thai Baht (THB), The Philippine Peso (PHP), Vietnam Dong (VND), and Singaporean Dollar (SGD). All currencies were measured in the exchange rate against the US Dollar (USD). The result indicated that PARCH model is the best method to explain the movement of MYR, VND, and SGD. GARCH can model THB and PHP. Only IDR that has volatility explainable by TARCH

    Landslide generated waves in dam reservoirs - Experimental investigation on a physical hydraulic model

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    The impulse waves generated by landslides that occur in an artificial basin may have disastrous impacts on the surrounding environment. For Alpine lakes, impulse waves are particularly significant, because of steep shores, narrow reservoirs geometry, possible large slide masses, and high impact velocities. Catastrophic events, as the well-known Vajont disaster occurred in Italy in 1963 which led to the loss of more than 2000 human lives, promoted the study of the physical process and the possible consequences of this phenomenon. The present analysis is based on an experimental research performed on a 1:190 physical scale model in laboratory, which allows to simulate the entire phenomenon, from the landslide movement to the dam overtopping. The main objective of this study is to gain more knowledge about the landslide generated impulse waves in reservoirs by trying to find a general modelling that, despite the phenomenon complexity, could help in the prediction of potential disaster effects. With this aim, experiments have been conducted by modifying the landslide location, the altitude of fall, its shape and volume, and by investigating two different dam freeboards. The research is initially focused on the simple observation of generated impulse waves amplitude and propagation in the basin, water height on the dam crest and total overtopping water volume. Subsequently, it proceeds with a dimensional analysis, based on the identified phenomenon governing parameters. In this way, we can demonstrate not only the influence of the slide volume and the basin water level on the total overtopping volume, but also the existing relation between the water outflow and the slide shape and velocity at the instant of impact with water

    Early-stage rifting of the northern Tyrrhenian Sea Basin: Results from a combined wide-angle and multichannel seismic study

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    Extension of the continental lithosphere leads to the formation of rift basins and ultimately may create passive continental margins. The mechanisms that operate during the early stage of crustal extension are still intensely debated. We present the results from coincident multichannel seismic and wide-angle seismic profiles that transect across the northern Tyrrhenian Sea Basin. The profiles cross the Corsica Basin (France) to the Latium Margin (Italy) where the early-rift stage of the basin is well preserved. We found two domains, each with a distinct tectonic style, heat flow and crustal thickness. One domain is the Corsica Basin in the west that formed before the main rift phase of the northern Tyrrhenian Sea opening (∼8–4 Ma). The second domain is rifted continental crust characterized by tilted blocks and half-graben structures in the central region and at the Latium Margin. These two domains are separated by a deep (∼10 km) sedimentary complex of the eastern portion of the Corsica Basin. Travel-time tomography of wide-angle seismic data reveals the crustal architecture and a subhorizontal 15–17 ± 1 km deep Moho discontinuity under the basin. To estimate the amount of horizontal extension we have identified the pre-, syn-, and post-tectonic sedimentary units and calculated the relative displacement of faults. We found that major faults initiated at angles of 45°–50° and that the rifted domain is horizontally stretched by a factor of β ∼ 1.3 (∼8–10 mm/a). The crust has been thinned from ∼24 to ∼17 km indicating a similar amount of extension (∼30%). The transect represents one of the best imaged early rifts and implies that the formation of crustal-scale detachments, or long-lived low-angle normal faults, is not a general feature that controls the rift initiation of continental crust. Other young rift basins, like the Gulf of Corinth, the Suez Rift or Lake Baikal, display features resembling the northern Tyrrhenian Basin, suggesting that half-graben formations and distributed homogeneous crustal thinning are a common feature during rift initiation

    Control of a Manual Transmission in an Electric Land Speed Vehicle

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    The Buckeye Bullet is a land speed vehicle which currently holds the record for the fastest electric vehicle. In order to improve upon the success of the Buckeye Bullet, the Buckeye Bullet 2 is being designed to reduce losses and improve upon safety of its predecessor. To this end, the development of a control method which would take into account many vehicle parameters in order to automatically control the Buckeye Bullet 2's sequential transmission is being investigated and developed. In addition, due to the nature of land speed vehicles and the inherent risk involved, it is very important that the driver be as focused as possible, and that the vehicle be very reliable. This research project investigates through modeling the effect that a control system would have on the existing Buckeye Bullet, and develops such a control system to be implemented onto the Buckeye Bullet 2
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