Stage Of Renovation Research Articles

Civita Musarna (VT), il suo territorio e la chora di Tarquinia in età ellenistica: uno spazio ritualmente suddiviso?

A new season of studies on the Etruscan-Roman city of Musarna have allowed us to establish that the city was occupied from the end of the 4th century BC up to the beginning of the 7th century AD, and that its foundation depended on a strategic and economic need of the Etruscan metropolis of Tarquinia, of which Musarna maintained its role of colony up approximately to 280 BC, when the entire territory was conquered by Rome. Later, the inscriptions and the epitaphs found in the site and in the nearby necropolis show that until the 1st century BC the only language spoken in Musarna was Etruscan, and that at least throughout the Hellenistic period, the administrative organization remained based on the model of a large Etruscan city. Therefore, the infrastructural networks, only partially restored later on, are fully Etruscan, as are the entire defense system and some public buildings, including a market and a portico built during various stages of the renovation of the square between the 3rd and 2nd century BC, as well as sacred buildings, such as two temples probably dedicated to Hercules and Bacchus. The excellent quality of the documentation of the urban plan made it possible to undertake a study aimed at determining the city’s spatial tracking practice. Some important considerations and insights on the organization of the territory have already emerged from this study and, in particular, we were able to verify on a territorial basis the size of the design module which had already identified on an urban scale. While this may already be considered an important result, the evidence of a design set on particular geometric properties prompts the investigation to highlight particular aspects of the Etruscan plan.

Іntroduction of level crossing of new generation on the railways of Ukraine

An analytical review of the existing types of level crossing emphasizes the need of introduction of motors and reducers of a new type in it to minimize its size, reduce costs, improve the operation reliability of the crossing signal system, and thereby to improve the safety of railway transport in general. The control scheme of the railway level crossing remains the same, which facilitates the renovation stages and it does not require additional training of maintenance personnel. It is proposed to minimize the size and weight of the level crossing due to the introduction of DC motors with permanent magnets, which are cheaper and more reliable in operation against existing engines such as SL-571k and AIR 56V4B43. Also it is possible to reduce the weight of the level crossing due to the introduction of a planetary gear, which is more compact, it has reduced load on the shafts of the gear and the teeth of the wheels, increased gear ratio, reduced noise and longer life. The scientific basis of the introduction of direct current motors with permanent magnets and the planetary gear of the railway level crossing is given. A technique is developed to determine the primary parameters of the electric circuit for the chosen type motor, its working and mechanical characteristics. The mathematical model of the dc motor with permanent magnets has been improved due to the introduction of the methodology for definition the ratio of electric and magnetic constants according to the specified passport data, of the primary parameters and its working and mechanical characteristics, which was the scientific basis for the justification for diagnosing the engines of level crossing. It is allowed us to change the planned preventive maintenance technology on the maintenance according to the state of the objects: level crossing of railways of Ukraine and UIS countries in further.

Іntroduction of level crossing of new generation on the railways of Ukraine

An analytical review of the existing types of level crossing emphasizes the need of introduction of motors and reducers of a new type in it to minimize its size, reduce costs, improve the operation reliability of the crossing signal system, and thereby to improve the safety of railway transport in general. The control scheme of the railway level crossing remains the same, which facilitates the renovation stages and it does not require additional training of maintenance personnel.It is proposed to minimize the size and weight of the level crossing due to the introduction of DC motors with permanent magnets, which are cheaper and more reliable in operation against existing engines such as SL-571k and AIR 56V4B43. Also it is possible to reduce the weight of the level crossing due to the introduction of a planetary gear, which is more compact, it has reduced load on the shafts of the gear and the teeth of the wheels, increased gear ratio, reduced noise and longer life. The scientific basis of the introduction of direct current motors with permanent magnets and the planetary gear of the railway level crossing is given.A technique is developed to determine the primary parameters of the electric circuit for the chosen type motor, its working and mechanical characteristics.The mathematical model of the dc motor with permanent magnets has been improved due to the introduction of the methodology for definition the ratio of electric and magnetic constants according to the specified passport data, of the primary parameters and its working and mechanical characteristics, which was the scientific basis for the justification for diagnosing the engines of level crossing. It is allowed us to change the planned preventive maintenance technology on the maintenance according to the state of the objects: level crossing of railways of Ukraine and UIS countries in further.

A Historical Timber Frame Model for Diagnosis and Documentation before Building Restoration

The aim of the project that is described in this paper was to define a four-level timber frame survey mode of a historical building: the so-called “Andlau's Seigniory”, Alsace, France. This historical building was built in the late XVIth century and was in a stage of renovation in order to become a heritage interpretation centre. The used measurement methods combine Total Station measurements, Photogrammetry and 3D Terrestrial Laser scanner. Different modelling workflows were tested and compared according to the data acquisition method, but also according to the characteristics of the reconstructed model in terms of accuracy and level of detail. 3D geometric modelling of the entire structure was performed including modelling the degree of detail adapted to the needs. The described 3D timber framework exists now in different versions, from a theoretical and geometrical one up to a very detailed one, in which measurements and evaluation of deformation by time are potentially allowed. The virtually generated models involving archaeologists, architects, historians and specialists in historical crafts, are intended to be used during the four stages of the project: (i) knowledge of the current state of needs for diagnosis and understanding of former construction techniques; (ii) preparation and evaluation of restoration steps; (iii) knowledge and documentation concerning the archaeological object; (iv) transmission and dissemination of knowledge through the implementation of museum animations. Among the generated models one can also find a documentation of the site in the form of virtual tours created from panoramic photographs before and during the restoration works. Finally, the timber framework model was structured and integrated into a 3D GIS, where the association of descriptive and complementary digital documents was possible. Both offer tools leading to the diagnosis, the understanding of the structure, knowledge dissemination, documentation and the creation of educational activities. The integration of these measurements in a historical information system will lead to the creation of an interactive model and the creation of a digital visual display unit for consultation. It will be offered to any public to understand interactively the art of constructing a Renaissance structure, with detailed photos, descriptive texts and graphics. The 3D digital model of the framework will be used directly in the interpretation path, within the space dedicated to “Seigniory” of Andlau. An interactive touch-screen will be installed. It will incorporate several levels of playgrounds (playful, evocative and teaching). In a virtual way, it will deal with the different stages of building a wooden framework and clarify the art of construction.

Assessing The Stregth And Weldability Of Historic Structural Steel

Abstract In practice, in the design stage of revitalization, renovation or reinforcement, there is often a need to determine the strength of steel as well as its weldability. The strength of steel can be determined in two ways: directly through destructive testing or indirectly - by the Brinell hardness test. In the case of weldability, this turns out to be much more difficult, because there are three groups of factors which determine this property, i.e.: local weldability, operative weldability, and overall weldability. This paper presents the results of the verification of the relationship between the hardness and strength of three grades of steel from the early twentieth century. The evaluation of the overall weldability of structural steels is discussed in an analytical approach preceding costly weldability tests. An assessment based on selected indicators of weldability can only lead to confusion.

The appeal of the green deal: Empirical evidence for the influence of energy efficiency policy on renovating homeowners

The Green Deal is a major new energy policy designed to support the diffusion of energy efficiency measures in UK homes. This paper provides one of the first empirical examinations of the Green Deal′s success in influencing homeowners’ renovation decisions. Using a repeated measures design in which households were questioned before and after the Green Deal′s launch in January 2013, we assess the policy′s success in raising awareness of energy efficiency. In particular, we test the effectiveness of the Green Deal′s positioning to overcome barriers to renovation among homeowners already interested in or considering energy efficiency measures. Using the innovation decision process (Rogers, 2003) as a conceptual framing of the renovation decision process, we examine whether new information on energy efficiency provided by the Green Deal strengthened intentions and its antecedents. We find that (1) energy efficiency is of potential appeal to all renovators regardless of their attitudes about energy efficiency, (2) energy efficiency opportunities need to be identified in the early stages of renovation when homeowners are thinking about ways to improve their home, and (3) homeowners’ intentions towards energy efficiency are weakened by uncertainty about financial benefits, helping to explain the relatively slow uptake of the Green Deal to-date.

Contextualism and Sustainability: A Community Renewal in Old City of Beijing

The conception of contextualism in community planning emphasizes the integrity of architecture and its surroundings. It also implies the sustainability of landscape meaning within a community. In as much as planning theories have not mentioned how extensive the background of a community should be considered by a community planner, this paper will seek to answer this question. It considers Nanluoguxiang (NLGX), a community in the old city of Beijing, as the study area. Based on government documents, interviews of residents and also landscape observations in NLGX, this paper identifies the contextual practices in three renovation stages from the perspective of place uniqueness. The planners considered the background of NLGX at three different scales in its three renovation stages. In the last stage, they considered the entire country within the context of planning. NLGX has a unique image in Beijing, even within China. The image of it is the main market at the north end of the Grand Canal. The Grand Canal shows the spatial organization power of the ancient empire because it was the key food supply route for the capital. This is not only the cultural heritage of local residents of NLGX, but is also identified by other citizens in China. We conclude that an historical community can be preserved better by national funds if it has found a unique meaning of its landscape within a broader background.

노약자를 위한 접근가능한 주택디자인 적용에 따른 비용 분석 연구

With increase of aging population, accessible housing features become more important for the elderly for their independent living and aging in their houses than before. There are prevalent awareness that accessible design or barrier free housing is more expensive than the traditional housing. The purpose of this study is to explore costs of accessible housing features as an attribute of housing and find out how much cost increase occurs when accessible design features are applied. Results from cost analysis could contribute to reduce redundant or unnecessary cost for renovation or construction stages. For the study, we have identified accessible design features. Three single house types and two apartment types will be selected for accessible housing development. The same dwelling with the only difference being their accessibility conditions will be compared. According to each space, accessible design features will be enumerated based on lifetime homes, barrier free design features, and universal design features, and cost for each feature will be generated. Total costs for accessible design features applicable to existing housing buildings were calculated for renovation and construction situation. The housing structures of the cases were not built to permit adaptations, its costs for renovation to increase accessibility are much higher. When they have been built considering accessible features from the beginning of planning stage, the cost for accessible would become much lower that the cost for alternation. The estimated costs of accessible housing compared to original construction costs, range from 0.5 percent to 5.3 per cent for single house and it could increase up to 10.6 percent if an elevator will be added. The estimates range form 9.4 percent to 16.7 percent for alterations or renovation.

Phenological and geographical influence in the concentration of selected bioactive 4-phenylcoumarins and chlorogenic acid in Hintonia latiflora leaves

Ethnopharmacological relevanceHintonia latiflora is a Mexican medicinal plant with well-documented ethnomedical record comprising more than 400 years; in modern Mexico is used for treating several maladies such as diabetes and gastric ulcers. Although the pharmacological actions of the stem-bark and leaves have been demonstrated, the phenological and geographical effect on the concentration of active principles remains unexplored. Aim of the studyThe main goals of this study were to analyze the amount of selected 4-phenylcoumarins and chlorogenic acid in the leaves in order to assess the best harvesting period, and consequently their pharmacological efficacy. In addition, the preclinical antidiabetic efficacy of the infusion of the leaves was corroborated using standard pharmacological tests. Materials and methodsThe aqueous extracts from the leaves of Hintonia latiflora were prepared by infusion. For phenological and geographical comparison, leaves of Hintonia latiflora were collected in two different regions in Chihuahua and Michoacán. The material was analyzed by UPLC applying an analytical method that developed and validated for this purpose following the ICH guidelines. Investigation of the antidiabetic action was accomplished using an acute hypoglycemic test and oral glucose and sucrose tolerance tests. ResultsThe validated analytical method was successfully applied for quantifying chlorogenic acid (1) and 4-phenylcoumarins (2–5) in the leaves of 12 different batches (1–12) during one-year period, and seven different batches for each geographical region; the concentration of the metabolites at the phenological cycle was significantly different, their concentration increased during the pre-senescence phase whereas in the leaf renovation stage the highest concentration of 2–5 was reached. The overall analysis of the active compounds concentration between the two populations investigated seems to be less important than the phenological variations. The aqueous extract of the leaves of Hintonia latiflora exerted its antidiabetic effect by different mechanisms showing comparable effect to the organic extract. ConclusionsThe findings of the present investigation reveal that the best harvest season for the leaves of Hintonia latiflora is between the leaves renovation and senescence stages avoiding the flowering period. In addition, no significant differences were found among the two different geographical populations analyzed. The infusions of the leaves, rich in 4-phenylcoumarins and chlorogenic acid, showed comparable antidiabetic action than the organic extract.

COMPARISON REFURBISHMENT MODELS OF DISTRICT HEATING NETWORKS

The renovation of multi-storey residential buildings reduces heat consumption intensity and decreases heat demand, which may have a harmful effect on a district heating supply system. The paper analyses the heat loss change in four district heating distribution networks (DHNs) of Kaunas at the various scenarios of buildings and DHN renovation stages. A bundle of genetic algorithm software package was used to carry out the districts’ distribution network hydraulic calculations in the case of building renovation without changing the hydrodynamic and network routes. The experimental data were used to calculate heat loss for old and new pipes. The computer data of networks used to summarise the cost of DHN then for the renovation of buildings as well as for renovation progress will go evenly with DHN refurbishment. Network optimization results were summarised by functional dependence. The comparison of the projects’ efficiency was analysed in the following cases: the diameters of pipes of DHN were not changed, new diameters of pipes were integrated partly after partial residential buildings renovation and after a complete renovation of residential building and optimisation of pipeline diameters. The efficiency of separate guidelines of the DHN refurbishment project was summarised by performing sensitivity analysis.

A HISTORICAL TIMBER FRAME MODEL FOR DIAGNOSIS AND DOCUMENTATION BEFORE BUILDING RESTORATION

Abstract. The aim of the project that is described in this paper was to define a four-level timber frame survey mode of a historical building: the so-called "Andlau's Seigniory", Alsace, France. This historical building (domain) was built in the late XVIth century and is now in a stage of renovation in order to become a heritage interpretation centre. The used measurement methods combine Total Station measurements, Photogrammetry and 3D Terrestrial Laser scanner. Different modelling workflows were tested and compared according to the data acquisition method, but also according to the characteristics of the reconstructed model in terms of accuracy and level of detail. 3D geometric modelling of the entire structure was performed including modelling the degree of detail adapted to the needs. The described 3D timber framework exists now in different versions, from a theoretical and geometrical one up to a very detailed one, in which measurements and evaluation of deformation by time are potentially allowed. The virtually generated models involving archaeologists, architects, historians and specialists in historical crafts, are intended to be used during the four stages of the project: (i) knowledge of the current state of needs for diagnosis and understanding of former construction techniques; (ii) preparation and evaluation of restoration steps; (iii) knowledge and documentation concerning the archaeological object; (iv) transmission and dissemination of knowledge through the implementation of museum animations. Among the generated models we can also find a documentation of the site in the form of virtual tours created from panoramic photographs before and during the restoration works. Finally, the timber framework model was structured and integrated into a 3D GIS, where the association of descriptive and complementary digital documents was possible. Both offer tools leading to the diagnosis, the understanding of the structure, knowledge dissemination, documentation and the creation of educational activities. The integration of these measurements in a historical information system will lead to the creation of an interactive model and the creation of a digital visual display unit for consultation. It will be offered to any public to understand interactively the art of constructing a Renaissance structure, with detailed photos, descriptive texts and graphics. The 3D digital model of the framework will be used directly in the interpretation path, within the space dedicated to "Seigniory" of Andlau. An interactive touch-screen will be installed. It will incorporate several levels of playgrounds (playful, evocative and teaching). In a virtual way, it will deal with the different stages of building a wooden framework and clarify the art of construction.

P-P-N Based 10T SRAM Cell for Low-Leakage and Resilient Subthreshold Operation

SRAM has been under its renovation stage recently, aiming to withstand the ever-increasing process variation as well as to support ultra-low-power applications using even subthreshold supply voltages. We present in this paper a novel P-P-N-based 10T SRAM cell, in which the latch is formed essentially by a cross-coupled P-P-N inverter pair. This type of cell can operate at a voltage as low as 285 mV while still demonstrating high resilience to process variation. Its noise margin has been elevated in not only the hold state, but also the read operations. As compared to previous 10T SRAM cells, our cell excels in particular in two aspects: 1) ultra-low cell leakage, and 2) high immunity to the data-dependent bitline leakage. The second merit makes it especially suitable for an SRAM macro with long bitlines - a property often desirable in order to achieve high density. We have fabricated and validated its performance through a 16 Kb SRAM test chip using the UMC 90 nm process technology.

Honeycomblike large area LaB6 plasma source for Multi-Purpose Plasma facility

A Multi-Purpose Plasma (MP(2)) facility has been renovated from Hanbit mirror device [Kwon et al., Nucl. Fusion 43, 686 (2003)] by adopting the same philosophy of diversified plasma simulator (DiPS) [Chung et al., Contrib. Plasma Phys. 46, 354 (2006)] by installing two plasma sources: LaB(6) (dc) and helicon (rf) plasma sources; and making three distinct simulators: divertor plasma simulator, space propulsion simulator, and astrophysics simulator. During the first renovation stage, a honeycomblike large area LaB(6) (HLA-LaB(6)) cathode was developed for the divertor plasma simulator to improve the resistance against the thermal shock fragility for large and high density plasma generation. A HLA-LaB(6) cathode is composed of the one inner cathode with 4 in. diameter and the six outer cathodes with 2 in. diameter along with separate graphite heaters. The first plasma is generated with Ar gas and its properties are measured by the electric probes with various discharge currents and magnetic field configurations. Plasma density at the middle of central cell reaches up to 2.6 x 10(12) cm(-3), while the electron temperature remains around 3-3.5 eV at the low discharge current of less than 45 A, and the magnetic field intensity of 870 G. Unique features of electric property of heaters, plasma density profiles, is explained comparing with those of single LaB(6) cathode with 4 in. diameter in DiPS.

Assessment of potential hazards during the process of house building in Estonia

The aim of this study was to evaluate new working conditions in the construction industry in Estonia. Three construction sites were investigated: a dwelling house at the stage of renovation, a warehouse at the stage of excavation and preparation work, and a hotel, where we examined the working conditions of the finishers. Microclimate: air temperature, relative humidity and air velocity were determined at every workplace. Full-shift personal exposure measurements of dust and gas exposure were performed among 97 construction workers in breathing zone air. The concentration of lead in the air was analysed by AAS. Vapours of benzene, styrene and toluene concentrations were determined by gas chromatography. The noise level was measured with the help of the sound-level meter at every workplace. All microclimatic indices were sometimes below or above exposure standards for indoor work. High levels of airborne dust and increased concentrations of lead were observed during repair work. Low concentrations of organic solvents in the air were determined when using paints and some synthetic substances. The noise level exceeded the permitted limit when an excavator and powerful electric appliances were used. A questionnaire determined the prevalence of subjectively experienced musculoskeletal strain in 30% of workers. The working conditions in the construction industry in Estonia are approaching European level. However, it is necessary to improve working conditions permanently by the use of new harmless materials, personal protective equipment, and through influencing worker health by permanent education and medical watch. We consider that questionnaires are very important in the control of the work environment, in subjective health assessments, and as a source of useful proposals to improve working conditions.

Vibration-based structural change identification of multi-storied reinforced concrete building using sensitivity-based model updating technique

The applicability of the sensitivity-based model updating technique to the identification of structural changes made in an existing structure was investigated with a pile supported reinforced concrete building undergoing major renovation. Seven different renovation stages which represented the different states of the building during the renovation were considered. The modal properties, i.e., natural frequencies and mode shapes, identified from the ambient vibration measurement of the building were used in the identification of structural changes. The sensitivity-based model updating technique was used to update the mathematical models of the building for all renovation stages. Structural change made in the building during renovation was quantified in terms of structural parameters identified from the model updating. More than 50% reduction in stiffness in the longitudinal direction of the building was found significant in all four story of the building, which may be attributed to the removal of shear walls. The storey stiffness obtained form the model updating was compared between before and after the renovation. Keywords: ambient vibration, mathematical model, sensitivity-based model updating, building renovation, structural change Nepalese Journal of Engineering Vol.1(1) 2005 pp.51-63