107 research outputs found
L’analyse des textures dans la cadre LIP (Logarithmic Image Processing)
No full textThis thesis looks at the evaluation of textures in two different perspectives using logarithmic image processing (LIP) framework. The first case after introducing the concept of textures and giving some classical approaches of textures evaluation, it gives an original approach of textures evaluation called covariogram which is derived from similarity metrics like distances or correlations etc. The classical covariogram which is derived from the classical similarity metrics and LIP covariogram are then applied over several images and the efficiency of the LIP one is clearly shown for darkened images. The last two chapters offer a new approach by considering the gray levels of an image as the phases of a medium. Each phase simulates like a percolation of a liquid in a medium defining the percolation trajectories. The propagation from one pixel to another is taken as easy or difficult determined by the difference of the gray level intensities. Finally different parameters like fractality from fractal dimensions, mean histogram etc associated to these trajectories are derived, based on which the primary experiment for the classification of random texture is carried out determining the relevance of this idea. Obviously, our study is only first approach and requires additional workout to obtain a reliable method of classificationEn fait, le concept de texture n’est pas facile à définir, mais il est clair qu’il est fortement lié au Système Visuel Humain. Sachant que le Modèle LIP est compatible avec la vision humaine, il nous a semblé intéressant de créer des outils logarithmiques dédiés à l’évaluation de la texture. Nous nous sommes concentrés sur la notion de covariogramme, qui peut être pilotée par diverses métriques logarithmiques. Ces métriques jouent le rôle d’outils de “corrélation”, avec l’avantage de prendre en compte la vision humaine. De plus, les outils LIP sont peu dépendants des conditions d’éclairement et fournissent donc des résultats robustes si celles-ci varient. Les deux derniers Chapitres proposent une nouvelle approche consistant à considérer les niveaux de gris d’une image comme les phases d’un milieu. Chaque phase permet de simuler la percolation d’un liquide dans le milieu, définissant ainsi des trajectoires de percolation. Chaque propagation d’un pixel à un autre est considérée comme facile ou non, en fonction des niveaux de gris traversés. Une « fonction de coût » est créée, qui modifie le « temps » de propagation d’un point à l’autre. De plus, la fonction de coût peut être calculée dans le contexte LIP, pour prendre en compte la vision humain
The major security challenges to cloud computing.
No full textCloud computing is the computing model in which the computing resources such as software, hardware and data are delivered as a service through a web browser or light-weight desktop machine over the internet (Wink, 2012). This computing model abolishes the necessity of sustaining the computer resources locally hence cuts-off the cost of valuable resources (Moreno, Montero & Llorente, 2012). A distinctive cloud is affected by different security issues such as Temporary Denial of Service (TDOS) attacks, user identity theft, session hijacking issues and flashing attacks (Danish, 2011). The purpose of this study is to bridge the research gap between the cloud security measures and the existing security threats. An investigation into the existing cloud service models, security standards, currently adopted security measures and their degree of flawless protection has been done. The theoretical study helped in revealing the security issues and their solutions whereas the empirical study facilitated in acknowledging the concerns of users and security analysts in regards to those solution strategies. The empirical methods used in this research were interviews and questionnaires to validate the theoretical findings and to grasp the innovativeness of practitioners dealing with cloud security.With the help of theoretical and empirical research, the two-factor mechanism is proposed that can rule out the possibility of flashing attacks from remote location and can help in making the cloud components safer. The problem of junk traffic can be solved by configuring the routers to block junk data packets and extraneous queries at the cloud outer-border. This security measure is highly beneficial to cloud security because it offers a security mechanism at the outer boundary of a cloud. It was evaluated that a DOS attack can become a huge dilemma if it affects the routers and the effective isolation of router-to-router traffic will certainly diminish the threat of a DOS attack to routers. It is revealed that the data packets that require a session state on the cloud server should be treated separately and with extra security measures because the conventional security measures cannot perform an in-depth analysis of every data packet. This problem can be solved by setting an extra bit in the IP header of those packets that require a state and have a session. Although this change should be done at universal level and would take time; it can provide a protocol-independent way to identify packets which require extra care. It will also assist firewalls to drop bits which are requesting a session sate without a state-bit being set. The cloud security analysts should consider that the interface and authentication layer should not be merged into a single layer because it endangers the authentication system as the interface is already exposed to the world. The use of login-aiding devices along with secret keys can help in protecting the cloud users. Moreover, a new cloud service model “Dedicated cloud” is proposed in this research work to reinforce the cloud security. It was discovered that the optimal blend of HTTPS and SSL protocols can resolve the problem of session hijacks. The client interface area should be protected by HTTPS protocols and the secure cookies should be sent through a SSL link along with regular cookies. Disallowing the multiple sessions and the use of trusted IP address lists will help even further. A reasonable amount of care has been paid to ensure clarity, validity and trustworthiness in the research work to present a verifiable scientific knowledge in a more reader-friendly manner. These security guidelines will enhance the cloud security and make a cloud more responsive to security threats.Program: Masterutbildning i Informati
L’analyse des textures dans la cadre LIP (Logarithmic Image Processing)
No full textThis thesis looks at the evaluation of textures in two different perspectives using logarithmic image processing (LIP) framework. The first case after introducing the concept of textures and giving some classical approaches of textures evaluation, it gives an original approach of textures evaluation called covariogram which is derived from similarity metrics like distances or correlations etc. The classical covariogram which is derived from the classical similarity metrics and LIP covariogram are then applied over several images and the efficiency of the LIP one is clearly shown for darkened images. The last two chapters offer a new approach by considering the gray levels of an image as the phases of a medium. Each phase simulates like a percolation of a liquid in a medium defining the percolation trajectories. The propagation from one pixel to another is taken as easy or difficult determined by the difference of the gray level intensities. Finally different parameters like fractality from fractal dimensions, mean histogram etc associated to these trajectories are derived, based on which the primary experiment for the classification of random texture is carried out determining the relevance of this idea. Obviously, our study is only first approach and requires additional workout to obtain a reliable method of classificationEn fait, le concept de texture n’est pas facile à définir, mais il est clair qu’il est fortement lié au Système Visuel Humain. Sachant que le Modèle LIP est compatible avec la vision humaine, il nous a semblé intéressant de créer des outils logarithmiques dédiés à l’évaluation de la texture. Nous nous sommes concentrés sur la notion de covariogramme, qui peut être pilotée par diverses métriques logarithmiques. Ces métriques jouent le rôle d’outils de “corrélation”, avec l’avantage de prendre en compte la vision humaine. De plus, les outils LIP sont peu dépendants des conditions d’éclairement et fournissent donc des résultats robustes si celles-ci varient. Les deux derniers Chapitres proposent une nouvelle approche consistant à considérer les niveaux de gris d’une image comme les phases d’un milieu. Chaque phase permet de simuler la percolation d’un liquide dans le milieu, définissant ainsi des trajectoires de percolation. Chaque propagation d’un pixel à un autre est considérée comme facile ou non, en fonction des niveaux de gris traversés. Une « fonction de coût » est créée, qui modifie le « temps » de propagation d’un point à l’autre. De plus, la fonction de coût peut être calculée dans le contexte LIP, pour prendre en compte la vision humain
L’analyse des textures dans la cadre LIP (Logarithmic Image Processing)
No full textThis thesis looks at the evaluation of textures in two different perspectives using logarithmic image processing (LIP) framework. The first case after introducing the concept of textures and giving some classical approaches of textures evaluation, it gives an original approach of textures evaluation called covariogram which is derived from similarity metrics like distances or correlations etc. The classical covariogram which is derived from the classical similarity metrics and LIP covariogram are then applied over several images and the efficiency of the LIP one is clearly shown for darkened images. The last two chapters offer a new approach by considering the gray levels of an image as the phases of a medium. Each phase simulates like a percolation of a liquid in a medium defining the percolation trajectories. The propagation from one pixel to another is taken as easy or difficult determined by the difference of the gray level intensities. Finally different parameters like fractality from fractal dimensions, mean histogram etc associated to these trajectories are derived, based on which the primary experiment for the classification of random texture is carried out determining the relevance of this idea. Obviously, our study is only first approach and requires additional workout to obtain a reliable method of classificationEn fait, le concept de texture n’est pas facile à définir, mais il est clair qu’il est fortement lié au Système Visuel Humain. Sachant que le Modèle LIP est compatible avec la vision humaine, il nous a semblé intéressant de créer des outils logarithmiques dédiés à l’évaluation de la texture. Nous nous sommes concentrés sur la notion de covariogramme, qui peut être pilotée par diverses métriques logarithmiques. Ces métriques jouent le rôle d’outils de “corrélation”, avec l’avantage de prendre en compte la vision humaine. De plus, les outils LIP sont peu dépendants des conditions d’éclairement et fournissent donc des résultats robustes si celles-ci varient. Les deux derniers Chapitres proposent une nouvelle approche consistant à considérer les niveaux de gris d’une image comme les phases d’un milieu. Chaque phase permet de simuler la percolation d’un liquide dans le milieu, définissant ainsi des trajectoires de percolation. Chaque propagation d’un pixel à un autre est considérée comme facile ou non, en fonction des niveaux de gris traversés. Une « fonction de coût » est créée, qui modifie le « temps » de propagation d’un point à l’autre. De plus, la fonction de coût peut être calculée dans le contexte LIP, pour prendre en compte la vision humain
دور المجتمع لحماية شرف الإنسان في ضوء السنة النبوية: The Role of Society in Preserving Human Dignity in the Light of the Prophetic Sunnah
No full textIn diverse societies, while individuals vary in temperament and needs, the fundamental human need for connection remains constant. Islam places a strong emphasis on exemplary conduct, including truthfulness, trustworthiness, and kind speech. The Quran describes the Prophet Muhammad (peace be upon him) as a model of such virtues, advocating gentle communication with the directive: "And speak to people good words." His teachings underscore ideal behavior, such as compassion and avoiding insults. Islam encourages moderation in conflicts, condemns partisanship, and upholds justice while discouraging mockery and disparagement. Partisanship undermines justice and unity, and Islamic texts promote fairness and empathy over bias. Good manners and kind interactions are seen as vital for piety and divine blessings, fostering equality and preventing discrimination. The principle of defending one's honor in Islam aligns with maintaining positive interactions and avoiding public shame. Rooted in the Prophet Muhammad’s teachings, this principle highlights the importance of concealing personal faults and offering private counsel instead of publicizing sins. The Prophet emphasized protecting individual dignity and ensuring that public interventions are managed by appropriate authorities. Unjustly revealing faults is likened to consuming the flesh of a dead brother, a grievous act in Islam. Defending others' honor against unjust accusations is considered meritorious, reflecting Islam’s commitment to personal dignity and communal righteousness
Pakistan’da hadis tartışmaları
No full text06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Semavî dinlerin temel gayesi insan ve cin olmak üzere mükellef olan mahlûkata Allah'ın isteğine uyumlu hayat düzeni sunarak, onlara dünya ve ahirette başarılı olabilme imkânı sağlamaktır. Mezkûr esastan hareketle karşımıza çıkan ilk soru dinin nereden öğrenileceğidir. Bu sorunun cevabı olarak bütün semâvî dinler esas olarak peygamberi referans göstermiştir. Fakat peygamberin kendisine indirilen vahye (kitaba) getirdiği açıklamalar ile diğer davranışlarının dindeki yeri ve bağlayıcılığı gibi önemli konular üzerinde farklı tartışmalar gerçekleşmiştir. Bu çalışmada bahsi geçen konunun farklı yönleriyle ilgili Pakistan'daki düşünürlerin görüşleri incelenmiştir. Çalışma, giriş, dört bölüm ve sonuçtan oluşmaktadır. Giriş kısmında tezin konusu ve önemi, araştırmanın amacı ve yöntemiyle birlikte bazı kaynaklar hakkında bilgi verilmiştir. Birinci bölüm Hz. Peygamber'in otoritesiyle alakalıdır. Bu bölümde Hz. Peygamber'e Kur'ân dışında vahiy verilip verilmeme meselesi ele alınmıştır. Daha sonra ise Hz. Peygamber'in otoritesinin mahiyeti, yani onun davranışlarının bağlayıcılığının sınırları hakkındaki görüş farklılıkları üzerinde durulmuştur. İkinci bölüm Hz. Peygamber'e nispet edilen söz, fiil ve takrirlerinin (hadis/sünnet) dindeki yerine ilişkindir. Bu bölümde hadis/sünnet kavramı, hücciyeti, Kur'ân'la olan ilişkisi, bunların tespit ölçütleri ve anlama esasları hakkındaki tartışmalardan bahsedilmiştir. Üçüncü bölümde, hadis tarihi ve usulü hakkındaki tartışmalar işlenmiştir. Burada hadis rivâyetinin ne zaman ve neden başladığı, hadislerin yazılması ve tedvini hakkındaki bazı hususlar, hadis uydurma hareketlerinin başlangıcı ve bunun kimi sebeplerinden bahsedilirmiştir. Ayrıca hadisçiler tarafından, hadis ve sünnetin tespiti için ortaya konulan usuller üzerindeki tartışmalar zikredilmiştir. Dördünce bölümde ise önceki bölümlerde zikredilen farklı görüşlerden hareketle bazı hadisler hakkında metin açısından cereyan eden tartışmalar ele alınmıştır. Nihayet tez sonuç kısmıyla tamamlanmıştır.The heavenly religions aim to provide believers the code of life in harmony with Allah's will and to enable them to succeed in the world and the hereafter. The first question that arises from the aforementioned principle is from where to learn the religion. As an answer to this question, all revelation-based religions mainly referred to their respective prophets. Contrary to this, there were different debates on important issues such as the significance of Prophet's explanations, teachings and deeds in relation to his revelations (Book). This study examines the different aspects of opinions of Pakistani scholars about the above mentioned issues. The study consists of introduction, four chapters and conclusion. The introductory part includes significance, objectives and research methodology of the study. The first chapter is about the authority of the Prophet Muhammad (PBUH). It discusses the issue of whether or not revelation excluding the Holy Qur'an was revealed to him (PBUH). Different opinions about the nature of the authority of the Prophet (PBUH) and the boundaries of the binding of his behaviour are also emphasized. The second chapter discusses the difference of opinions about the terms of hadith and sunnah, its authority and authenticity, its relationship with the Holy Qur'an. Their determined criteria and principles of understanding are also discussed. The third chapter discusses the history of hadith, its process of narration, compilation, beginning of the hadith fabrication movements and their reasons. In addition, the discussions about the methods put forward by muhaddithin to examine the authenticity hadiths also are mentioned. The fourth chapter includes discussions on some specific hadiths from textual aspect which have been considered unauthentic or fabricated. The final part is based upon conclusions of the thesis
The Approach of Imam Ibn Hiban in the Contradictory of Rafa and Waqf in his Book of "Al- taqaseem Wal-anwaa".
No full textThis article discusses about the discrepancy between al- Rafa wal Wqaf, which is a most difficult, and intricate branch of Ilm -Ul- Ilal al Hadiths.
Before Imam Hiban's time, more than fifty years, there was a contradictory on the reporting of the Hadith. Presumptions are the last arbitrator in the viewpoint of contemporary critics, who lack a conclusive conclusion in this issue. If the presumptions are favoring Rafa they consider it as Rafa, and if presumptions are favoring Wqaf it is taken as Wqaf. While the predecessors of ulamas in this field, in contrast, are like mathematical equations with their own standards for evaluating the chain of Hadith. Even if there are many narrators for the Waqf Hadith, if the Rafa Hadith narrators are credible, they accept it. In this study I focus upon the question that, what is Imam Hiban's point of view in the book "Al-taqaseem Wal-anwaa"https://khairulumma.com/index.php/about/article/view/3
The implementation problems of Medical Information Systems
No full textThe use of medical information systems is now prevailing in the whole healthcare environment where the focus is on reducing clinical errors and supporting healthcare professionals in their routine tasks. Hospitals adopt medical information systems to facilitate their healthcare staff in providing efficient services to patients. Studies show that most of the time these systems cannot deliver according to their functional capacities due to certain implementation problems. In this research, we have indicated different implementation problems, their root causes and suggested proper approaches for solving these issues. In the textual analysis, we examined different technical, psychological and social problems that may arise during the implementation process. These theoretical findings have been validated through questionnaires and interviews with doctors, nurses, technicians and people involved in the development of medical information systems. The companies that are providing implementation services are also consulted to validate the theoretical facts. The results show that implementation problems are social and psychological rather than technical, so these problems should be solved with interpersonal, psychological and social skills. The focus of the implementation process should be on the social, psychological and technical effects to avoid any conflict. Reasonable user involvement in the decision making process, motivation and proper training reduces many implementation issues automatically. It is concluded from empirical results that development and implementation teams should have reasonable medical domain knowledge to diminish future implementation and maintenance hazards. The theoretical and empirical results show that data security issues are psychological as well as technical and should be dealt with by high priority
L analyse des textures dans la cadre LIP (Logarithmic Image Processing)
No full textEn fait, le concept de texture n est pas facile à définir, mais il est clair qu il est fortement lié au Système Visuel Humain. Sachant que le Modèle LIP est compatible avec la vision humaine, il nous a semblé intéressant de créer des outils logarithmiques dédiés à l évaluation de la texture. Nous nous sommes concentrés sur la notion de covariogramme, qui peut être pilotée par diverses métriques logarithmiques. Ces métriques jouent le rôle d outils de corrélation , avec l avantage de prendre en compte la vision humaine. De plus, les outils LIP sont peu dépendants des conditions d éclairement et fournissent donc des résultats robustes si celles-ci varient. Les deux derniers Chapitres proposent une nouvelle approche consistant à considérer les niveaux de gris d une image comme les phases d un milieu. Chaque phase permet de simuler la percolation d un liquide dans le milieu, définissant ainsi des trajectoires de percolation. Chaque propagation d un pixel à un autre est considérée comme facile ou non, en fonction des niveaux de gris traversés. Une fonction de coût est créée, qui modifie le temps de propagation d un point à l autre. De plus, la fonction de coût peut être calculée dans le contexte LIP, pour prendre en compte la vision humaineThis thesis looks at the evaluation of textures in two different perspectives using logarithmic image processing (LIP) framework. The first case after introducing the concept of textures and giving some classical approaches of textures evaluation, it gives an original approach of textures evaluation called covariogram which is derived from similarity metrics like distances or correlations etc. The classical covariogram which is derived from the classical similarity metrics and LIP covariogram are then applied over several images and the efficiency of the LIP one is clearly shown for darkened images. The last two chapters offer a new approach by considering the gray levels of an image as the phases of a medium. Each phase simulates like a percolation of a liquid in a medium defining the percolation trajectories. The propagation from one pixel to another is taken as easy or difficult determined by the difference of the gray level intensities. Finally different parameters like fractality from fractal dimensions, mean histogram etc associated to these trajectories are derived, based on which the primary experiment for the classification of random texture is carried out determining the relevance of this idea. Obviously, our study is only first approach and requires additional workout to obtain a reliable method of classificationST ETIENNE-Bib. électronique (422189901) / SudocSudocFranceF
Effect of Age and Sex on Left Atrial and Left Ventricular Diastolic Diameters in Patients with Mild Diastolic Dysfunction (Grade I)
No full textBackground: To analyze the relationship between age, sex, left atrial and left ventricular diastolic diameters in patients with mild diastolic dysfunction.Methods: In this cross-sectional observational study patients (n=434) diagnosed with mild or grade 1 diastolic dysfunction on Pulse Wave Doppler Echocardiography (E/A<0.8, E/e’<8, abnormal DT) were included. Patients with valvular abnormalities and pericarditis were excluded. Diastolic left atrial and ventricular sizes were determined on echocardiography as per guidelines.Results:Sex did not show any significant correlation with left atrial and left ventricular diameters (p>0.05). Age was having moderate correlation with left atrial diameter (r=0.49). Age was having negative correlation with left ventricular diameter (r=-0.29) and this was statistically significant (p<0.01). On linear regression analysis, age was the only statistically significant variable that had an un-standardized beta coefficient (B) of 0.207 for left atrial diameter, and -0.7 for left ventricular diameter.Conclusion:Age was significantly correlated with left atrial and left ventricular diastolic diameters in patients with grade 1 diastolic dysfunction while sex was not statistically significant. On linear regression, age was the only significant factor in predicting left atrial and left ventricular diastolic diamete
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