220 research outputs found

    Evaluación superficial del pavimento flexible mediante el método del PCI en la carretera industrial conache, provincia de Trujillo, la libertad 2019

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    El presente trabajo tiene como objetivo aplicar el método PCI para determinar el Índice de Condición de Pavimento en LA CARRETERA INDUSTRIAL CONACHE. Tres mil metros lineales de pista han sido estudiados a detalle para identificar las fallas existentes y cuantificar el estado de la vía. La tesis presenta marco teórico, donde se define el concepto de pavimento, su clasificación y se explica la problemática que se vive en Trujillo. Así mismo trata de las fallas más comunes que afectan a los pavimentos urbanos flexibles. Se explica el procedimiento del método: el muestreo de unidades, el cálculo del PCI, los criterios de inspección, etc. Se describe la zona de estudio y se detalla el procedimiento de inspección realizado. Finalmente se presentan las hojas de registro, con el respectivo cálculo del índice de condición de pavimento para cada unidad de muestra analizada. Se concluye que LA CARRETERA INDUSTRIAL CONACHE tiene un pavimento de estado malo, con un PCI ponderado igual a 34.53. Finalmente, se han recomendado algunas técnicas de reparación, de acuerdo a las fallas detectadas, para restituir la carretera a su estado original.The present work aims to apply the method PCI to determine the Pavement Condition Index in THE CONACHE INDUSTRIAL ROAD. Three thousand linear meters of track have been studied in detail to identify existing faults and quantify the state of the track. The thesis presents theoretical framework, where the concept of pavement is defined, its classification and the problem that is lived in Trujillo is explained. It also deals with the most common faults that affect flexible urban pavements. The procedure of the method is explained: the sampling of units, the calculation of the PCI, the inspection criteria, etc. The study area is described and the inspection procedure is detailed. Finally, the registration sheets are presented, with the corresponding calculation of the pavement condition index for each unit of sample analyzed. It is concluded that THE CONACHE INDUSTRIAL ROAD has a bad state pavement, with a weighted PCI equal to 34.53. Finally, some repair techniques have been recommended, according to the failures detected, to restore the road to its original stateTesi

    Theoretical Debates on the Cultural Consequences of Globalization and Its Implication in the Light of the Ethiopian Culture

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    This paper examined the cultural consequences of globalization in line with different perspectives. The study relied on qualitative research approach along with secondary sources of data so as to analyze the relationship between culture and globalization. Even though people of the world have made closer relations for elongated and continuous periods of time, the pace of interactions, exemplified by the global flows of people, capital, information, commodities, culture etc, has shown significant improvement recently owing to the force of globalization. Thus, globalization, as a multifaceted process, is portrayed by the existence of continuous and multiple linkages on a global scale. One of the interactions by which globalization has been manifested; one is the cultural ties amongst nations. In these processes of cultural connectivity, there exist contact and exchange of elements among the world’s cultural rainbow having an array of end results, namely, homogenization, heterogenization, hybridization and polarization thesis. Keywords: Culture, globalization, homogenization, heteroginazation, hybridization, polarization, cultural imperialism DOI: 10.7176/IAGS/77-02 Publication date: November 30th 201

    スギヒラタケ(Pleurocybella porrigens)の有害成分に関する研究

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    取得学位:博士(薬学),学位授与番号:博甲第930号,学位授与年月日:平成19年3月22

    The Physics of Bodily Tides in Terrestrial Planets, and the Appropriate Scales of Dynamical Evolution

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    Any model of tides is based on a specific hypothesis of how lagging depends on the tidal-flexure frequency. For example, Gerstenkorn (1955), MacDonald (1964), and Kaula (1964) assumed constancy of the geometric lag angle, while Singer (1968) and Mignard (1979, 1980) asserted constancy of the time lag. Thus, each of these two models was based on a certain law of scaling of the geometric lag. The actual dependence of the geometric lag on the frequency is more complicated and is determined by the rheology of the planet. Besides, each particular functional form of this dependence will unambiguously fix the appropriate form of the frequency dependence of the tidal quality factor, Q. Since at present we know the shape of the dependence of Q upon the frequency, we can reverse our line of reasoning and single out the appropriate actual frequency-dependence of the angular lag. This dependence turns out to be different from those employed hitherto, and it entails considerable alterations in the time scales of the tide-generated dynamical evolution. Phobos' fall on Mars is an example we consider.Comment: arXiv admin note: substantial text overlap with arXiv:astro-ph/060552

    Seismicity controlled by resistivity structure : the 2016 Kumamoto earthquakes, Kyushu Island, Japan

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    The M JMA 7.3 Kumamoto earthquake that occurred at 1:25 JST on April 16, 2016, not only triggered aftershocks in the vicinity of the epicenter, but also triggered earthquakes that were 50–100 km away from the epicenter of the main shock. The active seismicity can be divided into three regions: (1) the vicinity of the main faults, (2) the northern region of Aso volcano (50 km northeast of the mainshock epicenter), and (3) the regions around three volcanoes, Yufu, Tsurumi, and Garan (100 km northeast of the mainshock epicenter). Notably, the zones between these regions are distinctively seismically inactive. The electric resistivity structure estimated from one-dimensional analysis of the 247 broadband (0.005–3000 s) magnetotelluric and telluric observation sites clearly shows that the earthquakes occurred in resistive regions adjacent to conductive zones or resistive-conductive transition zones. In contrast, seismicity is quite low in electrically conductive zones, which are interpreted as regions of connected fluids. We suggest that the series of the earthquakes was induced by a local accumulated stress and/or fluid supply from conductive zones. Because the relationship between the earthquakes and the resistivity structure is consistent with previous studies, seismic hazard assessment generally can be improved by taking into account the resistivity structure. Following on from the 2016 Kumamoto earthquake series, we suggest that there are two zones that have a relatively high potential of earthquake generation along the western extension of the MTL

    Whole mantle shear structure beneath the East Pacific Rise

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    We model broadband seismograms containing triplicated S, S2, and S3 along with ScS to produce a pure path one‐dimensional model extending from the crust to the core‐mantle boundary beneath the East Pacific Rise. We simultaneously model all body wave shapes and amplitudes, thereby eliminating depth‐velocity ambiguities. The data consist of western North American broadband recordings of East Pacific Rise (EPR) affiliate transform events that form a continuous record section out to 82° and sample nearly the entire East Pacific Rise. The best fitting synthetics contain attenuation and small changes in lithospheric thickness needed to correct for variation in bounce point ages. The 660‐km discontinuity is particularly well resolved and requires a steep gradient (4%), extending down to 745 km. We find no discernible variation in apparent depths of the 405‐ and 660‐km discontinuities over ridge‐orthogonal distances on the order of 1000 km (or 20 Ma lithosphere). Body waveform comparisons indicate that we can resolve discontinuity depths to less than ±10 km, providing an upper limit to transition zone topography. These depth estimates, in conjunction with the fan shot nature of the ray paths, lower the detection limit from S2 precursor analysis of the lateral length scale over which short‐wavelength topographic variation could occur and indicate the sub‐EPR Transition Zone and upper mantle are remarkably homogeneous. The lower mantle beneath the East Pacific Rise is well modeled by PREM, with the greatest variation occurring in ScS, reflecting strong heterogeneity along the core‐mantle boundary. Together, these observations require that the East Pacific Rise spreading ridge cannot be actively supplied from the local lower mantle and that tomographically imaged lateral variation beneath the ridge likely reflects lateral smearing of outlying velocity gradients. Dynamically, the transition zone therefore appears vertically decoupled from the overlying East Pacific Rise spreading system

    Bodily tides near spin-orbit resonances

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    Spin-orbit coupling can be described in two approaches. The method known as "the MacDonald torque" is often combined with an assumption that the quality factor Q is frequency-independent. This makes the method inconsistent, because the MacDonald theory tacitly fixes the rheology by making Q scale as the inverse tidal frequency. Spin-orbit coupling can be treated also in an approach called "the Darwin torque". While this theory is general enough to accommodate an arbitrary frequency-dependence of Q, this advantage has not yet been exploited in the literature, where Q is assumed constant or is set to scale as inverse tidal frequency, the latter assertion making the Darwin torque equivalent to a corrected version of the MacDonald torque. However neither a constant nor an inverse-frequency Q reflect the properties of realistic mantles and crusts, because the actual frequency-dependence is more complex. Hence the necessity to enrich the theory of spin-orbit interaction with the right frequency-dependence. We accomplish this programme for the Darwin-torque-based model near resonances. We derive the frequency-dependence of the tidal torque from the first principles, i.e., from the expression for the mantle's compliance in the time domain. We also explain that the tidal torque includes not only the secular part, but also an oscillating part. We demonstrate that the lmpq term of the Darwin-Kaula expansion for the tidal torque smoothly goes through zero, when the secondary traverses the lmpq resonance (e.g., the principal tidal torque smoothly goes through nil as the secondary crosses the synchronous orbit). We also offer a possible explanation for the unexpected frequency-dependence of the tidal dissipation rate in the Moon, discovered by LLR
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