Search results for " reconstruction"
showing 10 items of 694 documents
Reconstruction of urban sites from photos
2019
Abstract. This paper reports the results of an experiment that aims at the virtual reconstruction of a urban site that has been partially reshaped during the 20th century; the reconstruction process is based on period photos. The chosen case study is the eldest harbour of Palermo, named ‘Cala’; the site was bombed during World War II and new buildings took the place of the ruined ones. Two period photos, taken from an aircraft, document the buildings that were destroyed by bombs. The 3D restitution process used the ‘inverse’ projection from period photos (2D) to the virtual space (3D) ; the first step was therefore addressed to the calculation of the inner parameters (focal length, principa…
3D RECONSTRUCTION-REVERSE ENGINEERING- DIGITAL FABRICATION OF THE EGYPTIAN PALERMO STONE USING BY SMARTPHONE AND LIGHT STRUCTURED SCANNER
2018
Abstract. This paper presents a pipeline that has been developed to acquire a shape with particular features both under the geometric and radiometric aspects. In fact, the challenge was to build a 3D model of the black Stone of Palermo, where the oldest Egyptian history was printed with the use of hieroglyphs. The dark colour of the material and the superficiality of the hieroglyphs' groove have made the acquisition process very complex to the point of having to experiment with a pipeline that allows the structured light scanner not to lose the homologous points in the 3D alignment phase. For the texture reconstruction we used a last generation smartphone.
SHIFTS OF START AND END OF SEASON IN RESPONSE TO AIR TEMPERATURE VARIATION BASED ON GIMMS DATASET IN HYRCANIAN FORESTS
2018
Abstract. Climate change is one of the most important environmental challenges in the world and forest as a dynamic phenomenon is influenced by environmental changes. The Hyrcanian forests is a unique natural heritage of global importance and we need monitoring this region. The objective of this study was to detect start and end of season trends in Hyrcanian forests of Iran based on biweekly GIMMS (Global Inventory Modeling and Mapping Studies) NDVI3g in the period 1981-2012. In order to find response of vegetation activity to local temperature variations, we used air temperature provided from I.R. Iran Meteorological Organization (IRIMO). At the first step in order to remove the existing g…
3D RECONSTRUCTION OF THE ROMAN DOMUS IN THE ARCHAEOLOGICAL SITE OF LYLIBAEUM (MARSALA, ITALY)
2019
Abstract. Generally, terrestrial laser scanning surveys involve a rather large number of scans to ensure a high percentage of overlap required for the scan registration phase (target-based or point-based registration, cloud-to-cloud registration). These approaches result in data redundancy that could slow down both the acquisition and post-processing phases. In recent years, the technological evolution in the field of laser scanners has been directed to the development of devices that are able to perform an onsite pre-registration, to optimize the survey procedures and the reliability of the registration of the scan. The paper presents the results achieved during a terrestrial laser scannin…
High Performance 3D PET Reconstruction Using Spherical Basis Functions on a Polar Grid
2011
Statistical iterative methods are a widely used method of image reconstruction in emission tomography. Traditionally, the image space is modelled as a combination of cubic voxels as a matter of simplicity. After reconstruction, images are routinely filtered to reduce statistical noise at the cost of spatial resolution degradation. An alternative to produce lower noise during reconstruction is to model the image space with spherical basis functions. These basis functions overlap in space producing a significantly large number of non-zero elements in the system response matrix (SRM) to store, which additionally leads to long reconstruction times. These two problems are partly overcome by expl…
Now you see me: perception as a basic principle in foreign languages learning
2016
No observamos todo lo que somos capaces de ver, ni escuchamos todo lo que creemos oír. Percibimos, en gran medida, aquello que estamos esperando que suceda y no lo que realmente sucede, hacemos reconstrucciones y predicciones constantemente. Así funciona el cerebro. En el caso de estudiantes cuya lengua materna es similar al español el principio de cierre hace que sean capaces de entender el sentido general del texto sin tan siquiera tener mucha práctica con el español. Por otro lado, este proceso puede suponer un impedimento a la hora de discriminar las diferencias que existen entre ambas lenguas. Buena prueba de ellos son aquellos que a pesar de vivir años en un ambiente de inmersión ling…
The relation between human values and perceived situation characteristics in everyday life
2018
Values refer to abstract beliefs which serve as guidelines in peoples’ life and affect the way people and events are evaluated. Simultaneously, unlike attitudes, values transcend specific actions, and situations. While recent research showed that values are related to the attention and interpretation of situational information in standardized laboratory settings, up to date hardly any empirical work investigated how values relate to situation perception in daily life. In our study, we assessed the relation between the endorsement of human values and situation characteristics (i.e., the 8 DIAMONDS). Using the Day Reconstruction Method in two samples (German and US-American), we found that es…
Acromion clavicular joint reconstruction with LArS ligament in acute dislocation
2019
Background: The acromion clavicular joint dislocations are common injuries of the shoulder. The severity is dependent upon the degree of ligamentous injury. Surgical treatment is typically performed in higher grade acromioclavicular separation with several static and dynamic operative procedures with or without primary ligament replacement. Methods: 47 patients with acute Rockwood type III, IV, and V injuries were treated surgically with LARS reconstruction. The success of technique was evaluated by radiographic outcomes for each patient at every follow-up visit (one,three, 12 months), while to assess pain reduction and clinical evaluation Visual Analogue scale score (VAS) and Constant-Murl…
IMPLANT-PROSTHETIC REHABILITATION OF UNIDENTARE EDENTATION – PRINCIPLES OF TREATMENT
2015
For a practitioner with experience, the restoration with one or two individual crowns is relatively simple from clinical and technical point of view, but if a single crown has to be rebuilt in areas with major aesthetic concern, the prosthetic restoration becomes a challenge for any team of professionals. A major challenge for such a team si the unidental restoration, with or without implants, of a single incisor from the frontal maxillar area, especially the central superior incisors. These teeth have a highly aesthetic part since they are in direct connection with the shape and the aspect of the face. In the evaluation of the dental shape of the central incisors we can use different param…
Novel fasciocutaneous flaps for the reconstruction of complicated lower extremity wounds
2009
Summary: Reconstruction of the leg is particularly challenging especially when the defect involves its lower third. The options for lower leg reconstruction are very few because of the lack of local soft tissue available for transfer. Novel fasciocutaneous flaps nourished by perforator vessels have been developed and are increasingly used as a valuable local alternative to the local flaps, with their high complication rates, and to the microsurgical flaps, with their more difficult and specialized technique. They provide local tissue, replacing like with like, but they harvest it from a distant, undamaged, region of the leg, which means healthy and well-vascularized tissue. They do not need…