98 research outputs found
Computational models of myocardial endomysial collagen arrangement
No full textCollagen extracellular matrix is one of the factors related to high passive stiffness of cardiac muscle. However, the architecture and the mechanical aspects of the cardiac collagen matrix are not completely known. In particular, endomysial collagen contribution to the passive mechanics of cardiac muscle as well as its micro anatomical arrangement is still a matter of debate. In order to investigate mechanical and structural properties of endomysial collagen, we consider two alternative computational models of some specific aspects of the cardiac muscle. These two models represent two different views of endomysial collagen distribution: (1) the traditional view and (2) a new view suggested by the data obtained from scanning electron microscopy (SEM) in NaOH macerated samples (a method for isolating collagen from the other tissue). We model the myocardial tissue as a net of spring elements representing the cardiomyocytes together with the endomysial collagen distribution. Each element is a viscous elastic spring, characterized by an elastic and a viscous constant. We connect these springs to imitate the interconnections between collagen fibers. Then we apply to the net of springs some external forces of suitable magnitude and direction, obtaining an extension of the net itself. In our setting, the ratio forces magnitude/net extension is intended to model the stress/strain ratio of a microscopical portion of the myocardial tissue. To solve the problem of the correct identification of the values of the different parameters involved, we use an artificial neural network approach. In particular, we use this technique to learn, given a distribution of external forces, the elastic constants of the springs needed to obtain a desired extension as an equilibrium position. Our experimental findings show that, in the model of collagen distribution structured according to the new view, a given stress/strain ratio (of the net of springs, in the sense specified above) is obtained with much smaller (w.r.t. the other model, corresponding to the traditional view) elasticity constants of the springs. This seems to indicate that by an appropriate structure, a given stiffness of the myocardial tissue can be obtained with endomysial collagen fibers of much smaller size. (c) 2007 Elsevier Ireland Ltd. All rights reserved
Dental radiology dosimetric data as routinely collected in an Italian hospital
No full textThe work presented here was developed in the framework of the SENTINEL Project and is devoted to the analysis of dental radiology dosimetric data. The procedure of data processing allows the analysis of some important aspects related to the protection of the patient and the staff because of the position of the operators near the patient and their exposure to the radiation scattered by the patient. Dental radiology data was collected in an Italian hospital. Following the Italian quality assurance (QA) protocols and suggestions by the leaders of the SENTINEL Project, X-ray equipment performances have been analysed in terms of: kVp accuracy, exposure time accuracy and precision, tube output, dose reproducibility and linearity, beam collimation, artefacts and light tightness. Referring to these parameters the physical quality index (QI) was analysed. In a single numerical value between 0 and 1, QI summarises the results of quality tests for radiological devices. The actual impact of such figure (as suggested by international QA protocols or as adopted by local QA routine) on the policy of machine maintenance and replacement is discussed
Water Distribution Network Perspective in RAFAEL Project, A System for Critical Infrastructure Risk Analysis and Forecast
No full text
Automatic synthesis of robust numerical controllers
No full textA major problem of numerical controllers is their robustness, i.e. the state read from the plant may not be in the controller table, although it may be close to some states in the table. For continuous systems, this problem is typically handled by interpolation techniques. Unfortunately, when the plant contains both continuous and discrete variables, the interpolation approach does not work well. To cope with this kind of systems, we propose a general methodology that exploits explicit model checking in an innovative way to automatically synthesize a (time-) optimal numerical controller from a plant specification and apply an optimized strengthening algorithm only on the most significant states, in order to reach an acceptable robustness degree. We implemented all the algorithms within our CGMunφ tool, an extension of the well-known CMunφ verifier, and tested the effectiveness of our approach by applying it to the well-known truck and trailer obstacles avoidance problem. © 2007 IEEE
PERLINDUNGAN HUKUM ATAS KARYA POTRET YANG DIGUNAKAN SECARA KOMERSIAL TANPA PERSETUJUAN ORANG YANG DIPOTRET (Analisis Putusan Mahkamah Agung Nomor 262 K/Pdt.Sus-HKI/2016 dan Studi Komparatif Perlindungan Hukum Atas Karya Potret di Indonesia dan Belanda)
No full textTofani Yurisar Akbar, Moch. Zairul Alam, SH., MH., Diah Pawestri Maharani, SH., MH. Fakultas Hukum Universitas Brawijaya Email : [email protected]  Abstrak Potret merupakan salah satu seni fotografi dengan menampilkan objek manusia baik secara individual maupun kelompok, yang menonjolkan unsur kepribadian objek foto tersebut. Menurut Pasal 1 Angka 10 Undang-Undang Nomor 28 Tahun 2014 tentang Hak Cipta (selanjutnya disebut Undang-Undang Hak Cipta) dijelaskan bahwa potret adalah karya fotografi dengan objek manusia. Dalam menggunakan potret seseorang untuk kepentingan komersial, Undang-Undang Hak Cipta mengamanahkan pengguna potret tersebut untuk mendapatkan izin tertulis terlebih dahulu dari orang yang dipotret. Dalam prakteknya, penggunaan potret untuk kepentingan komersial dapat menjadi suatu perkara di pengadilan. Penulis akan menganalisis kasus pada putusan Mahkamah Agung (MA) Nomor 262 K/Pdt.Sus-HKI/2016 terkait dengan potret dari dr. Arnold yang digunakan untuk kepentingan komersial oleh PT. Siloam International Hospitals. Berangkat dari analisis kasus pada putusan tersebut, penulis mencoba memberikan rekomendasi pengaturan yang ideal terkait perlindungan hukum atas karya potret yang digunakan secara komersial dengan membandingkan ketentuan hak cipta di Indonesia dan Belanda. Untuk menjawab permasalahan hukum yang diangkat penulis, jenis penelitian yang digunakan penulis adalah penelitian yuridis normatif dengan menggunakan pendekatan perundang-undangan, pendekatan kasus, pendekatan perbandingan, serta pendekatan konseptual. Kata Kunci: Perlindungan Hukum, Hak Cipta, Potret, Penggunaan Secara Komersial AbstractPortrait is defined as an art which shows an individual or a group of people in which the personality of the person or people in the photo is reflected. Article 1 Number 10 of Law Number 28 of 2014 on Copyright (further stated as the Law of Copyright) states that a portrait is a work of photography which shows a person as the object portrayed. The law of copyright suggests that it is essential to obtain a written consent from the person portrayed in the portrait before the portrait is used commercially. However, practically, the portraits used commercially often ends up in the court. This research analyses the case of the Decision of Supreme Court Number 262 K/Pdt.Sus-HKI/2016 regarding the portrait of dr. Arnold, which was then used commercially by PT. Siloam International Hospitals. Based on the analysis of the case, the author has meant to contribute ideal control of legal protection regarding commercially used portrait and compared the provision of copyright in Indonesia and The Netherlands. This research employed normative-juridical method with statute, case, comparative, and conceptual approach. Keywords: legal protection, copyright, portrait, commercially usedÂ
Brief communication A prototype forecasting chain for rainfall induced shallow landslides
No full textAlthough shallow landslides are a very widespread phenomenon, large area (e.g. thousands of square kilometres) early warning systems are commonly based on statistical rainfall thresholds, while physically based models are more commonly applied to smaller areas. This work provides a contribution towards the filling of this gap: a forecasting chain is designed assembling a numerical weather prediction model, a statistical rainfall downscaling tool and a geotechnical model for the distributed calculation of the factor of safety on a pixel-by-pixel basis. The forecasting chain can be used to forecast the triggering of shallow landslides with a 48 h lead time and was tested on a 3200 km2 wide area. © 2013 Author(s)
Alcune richerche storiche sull'ufficio e la professione di ragioniere a Firenze al tempo della repubblica /
No full textMode of access: Internet
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