Service Provision for Pervasive Computing Environments

2009 ◽  
pp. 279-289
Author(s):  
Emerson Loureiro ◽  
Frederico Bublitz ◽  
Loreno Oliveira ◽  
Nadia Barbosa ◽  
Angelo Perkusich ◽  
...  
Keyword(s):  
Mobile Devices ◽  
Pervasive Computing ◽  
Service Provision ◽  
The Other ◽  
Service Oriented Computing ◽  
Computing Paradigm ◽  
Other Hand ◽  
The Future ◽  
Service Oriented ◽  
Computing Environments

The fast development on microelectronics has promoted the increase on the computational power of hardware components. On the other hand, we are facing a significant improvement on energy consumption as well as the reduction of the physical size of such components. These improvements and the emergence of wireless networking technologies are enabling the development of small and powered mobile devices. Due to this scenario, the so-called pervasive computing paradigm, introduced by Mark Weiser in 1991 (Weiser, 1991) is becoming a reality. Such a paradigm envisions a world where environments are inhabited by computing devices, all of them seamlessly integrated into peoples’ lives, and effectively helping to carry on their daily tasks. Among others, one major characteristic of Weiser’s vision is that each device in an environment becomes a potential client or provider of resources. Not surprisingly, pervasive computing environments are becoming dynamic repositories of computational resources, all of them available to mobile users from the palm of their hands. However, devices can unpredictably join and leave such environments. Thus, resources can be dynamically made available or unavailable. Such a scenario has a great impact on the way that resources are found and used. In the case of static environments, such as the Web, it is reasonable to look up and access resources, such as Web pages, knowing the address of their providers beforehand. On the other hand, for dynamic environments, such as the pervasive computing ones, this is not a reasonable approach. This is due to the fact that one cannot guarantee that the provider of a resource will be available at any moment, because it may have left the environment or simply turned off. A better approach would be to discover these resources based on their descriptions, or any other feature that does not require the client to know the specific address of their providers. To this end, some of the current pervasive computing solutions, like Wings (Loureiro, Bublitz, Oliveira, Barbosa, Perkusich, Almeida, & Ferreira, 2006), Green (Sivaharan, Blair, & Coulson, 2005), RUNES (Costa, Coulson, Mascolo, Picco, & Zachariadis, 2005), and Scooby (Robinson, Wakeman, & Owen, 2004), are making use of a novel approach from the branch of distributed applications, the service-oriented computing paradigm (Papazoglou, 2003; Huhns & Singh, 2005). This is due to the fact that such a paradigm provides a crucial element for pervasive computing systems, the ability for dynamically binding to remote resources (Bellur & Narenda, 2005), which enables mobile devices to find needed services on demand. However, pervasive environments may be structured in different ways. They can range from wired networks to completely wireless ones, where communication among the devices is performed in an ad hoc way. Such a characteristic indicates that the way services are provisioned in a pervasive computing environment should fit in its organization, in order to enhance the access to the services available. Considering the above discussion, in this article we provide a review on service provision and its applicability in pervasive computing. More precisely, we will list the existing service provision approaches and discuss the characteristics and problems associated with each one, as well as their usage in pervasive computing environments. We start by providing introductory concepts of service-oriented and pervasive computing, respectively in the service-oriented computing and pervasive computing sections. Next, we present the service provision techniques available and how they can be applied for pervasive computing environments. The main current solutions within this scope will be introduced in the service oriented technologies section. Some of the future trends associated with research for service provision in pervasive computing environments will be presented in the future research trends section. Finally, in the conclusions sect

Service Provision for Pervasive Computing Environments

2007 ◽  
pp. 877-884
Author(s):  
E. Loureiro ◽  
Frederico Bublitz ◽  
Loreno Oliveira ◽  
Nadia Barbosa ◽  
Angelo Perkusich ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Mobile Devices ◽  
Pervasive Computing ◽  
The Other ◽  
Computational Power ◽  
Physical Size ◽  
Computing Paradigm ◽  
Fast Development ◽  
Computing Environments ◽  
Networking Technologies

The fast development on microelectronics has promoted the increase on the computational power of hardware components. On the other hand, we are facing a significant improvement on energy consumption as well as the reduction of the physical size of such components. These improvements and the emergence of wireless networking technologies are enabling the development of small and powered mobile devices. Due to this scenario, the so-called pervasive computing paradigm, introduced by Mark Weiser in 1991 (Weiser, 1991) is becoming a reality. Such a paradigm envisions a world where environments are inhabited by computing devices, all of them seamlessly integrated into peoples’ lives, and effectively helping to carry on their daily tasks.

Bridging Together Mobile and Service-Oriented Computing

2009 ◽  
pp. 3212-3221
Author(s):  
Loreno Oliveira ◽  
Emerson Loureiro ◽  
Hyggo Almeida ◽  
Angelo Perkusich
Keyword(s):  
Mobile Devices ◽  
Pervasive Computing ◽  
Essential Elements ◽  
Smart Spaces ◽  
New Paradigm ◽  
Dynamic Binding ◽  
Service Oriented Architectures ◽  
Service Oriented Computing ◽  
Use Of Services ◽  
Service Oriented

The growing popularity of powerful mobile devices, such as modern cellular phones, smart phones, and PDAs, is enabling pervasive computing (Weiser, 1991) as the new paradigm for creating and interacting with computational systems. Pervasive computing is characterized by the interaction of mobile devices with embedded devices dispersed across smart spaces, and with other mobile devices on behalf of users. The interaction between user devices and smart spaces occurs primarily through services advertised on those environments. For instance, airports may offer a notification service, where the system registers the user flight at the checkin and keeps the user informed, for example, by means of messages, about flight schedule or any other relevant information. In the context of smart spaces, service-oriented computing (Papazoglou & Georgakopoulos, 2003), in short SOC, stands out as the effective choice for advertising services to mobile devices (Zhu, Mutka, & Ni, 2005; Bellur & Narendra, 2005). SOC is a computing paradigm that has in services the essential elements for building applications. SOC is designed and deployed through service-oriented architectures (SOAs) and their applications. SOAs address the flexibility for dynamic binding of services, which applications need to locate and execute a given operation in a pervasive computing environment. This feature is especially important due to the dynamics of smart spaces, where resources may exist anywhere and applications running on mobile clients must be able to find out and use them at runtime. In this article, we discuss several issues on bridging mobile devices and service-oriented computing in the context of smart spaces. Since smart spaces make extensive use of services for interacting with personal mobile devices, they become the ideal scenario for discussing the issues for this integration. A brief introduction on SOC and SOA is also presented, as well as the main architectural approaches for creating SOC environments aimed at the use of resource-constrained mobile devices.

‘Newness which never perishes’? Schoenberg’s ambivalent reception of Haydn

2010 ◽  
Vol 51 (1-2) ◽  
pp. 215-224
Author(s):  
Alexander Carpenter
Keyword(s):  
The Other ◽  
Major Influence ◽  
Musical Style ◽  
The Past ◽  
Other Hand ◽  
The Future ◽  
Music Tradition

This paper explores Arnold Schoenberg’s curious ambivalence towards Haydn. Schoenberg recognized Haydn as an important figure in the German serious music tradition, but never closely examined or clearly articulated Haydn’s influence and import on his own musical style and ethos, as he did with many other major composers. This paper argues that Schoenberg failed to explicitly recognize Haydn as a major influence because he saw Haydn as he saw himself, namely as a somewhat ungainly, paradoxical figure, with one foot in the past and one in the future. In his voluminous writings on music, Haydn is mentioned by Schoenberg far less frequently than Bach, Mozart, or Beethoven, and his music appears rarely as examples in Schoenberg’s theoretical texts. When Schoenberg does talk about Haydn’s music, he invokes — with tacit negativity — its accessibility, counterpoising it with more recondite music, such as Beethoven’s, or his own. On the other hand, Schoenberg also praises Haydn for his complex, irregular phrasing and harmonic exploration. Haydn thus appears in Schoenberg’s writings as a figure invested with ambivalence: a key member of the First Viennese triumvirate, but at the same time he is curiously phantasmal, and is accorded a peripheral place in Schoenberg’s version of the canon and his own musical genealogy.

Basic Concepts and Definitions of Allergology

2019 ◽  
Author(s):  
Zoran Vrucinic
Keyword(s):  
Immune Reaction ◽  
The Body ◽  
The Other ◽  
Specific Response ◽  
Other Hand ◽  
Medical Vocabulary ◽  
The Future ◽  
Basic Concepts ◽  
Basic Insight ◽  
Insight Into

The future of medicine belongs to immunology and alergology. I tried to not be too wide in description, but on the other hand to mention the most important concepts of alergology to make access to these diseases more understandable, logical and more useful for our patients, that without complex pathophysiology and mechanism of immune reaction,we gain some basic insight into immunological principles. The name allergy to medicine was introduced by Pirquet in 1906, and is of Greek origin (allos-other + ergon-act; different reaction), essentially representing the reaction of an organism to a substance that has already been in contact with it, and manifested as a specific response thatmanifests as either a heightened reaction, a hypersensitivity, or as a reduced reaction immunity. Synonyms for hypersensitivity are: altered reactivity, reaction, hypersensitivity. The word sensitization comes from the Latin (sensibilitas, atis, f.), which means sensibility,sensitivity, and has retained that meaning in medical vocabulary, while in immunology and allergology this term implies the creation of hypersensitivity to an antigen. Antigen comes from the Greek words, anti-anti + genos-genus, the opposite, anti-substance substance that causes the body to produce antibodies.

Monotheism in Isaiah

2020 ◽  
pp. 218-248
Author(s):  
Matthias Albani
Keyword(s):  
Historical Context ◽  
The Other ◽  
Divine Power ◽  
Crisis Situation ◽  
Catalytic Function ◽  
Other Hand ◽  
The Future ◽  
The One ◽  
Religious Crisis

The monotheistic confession in Isa 40–48 is best understood against the historical context of Israel’s political and religious crisis situation in the final years of Neo-Babylonian rule. According to Deutero-Isaiah, Yhwh is unique and incomparable because he alone truly predicts the “future” (Isa 41:22–29)—currently the triumph of Cyrus—which will lead to Israel’s liberation from Babylonian captivity (Isa 45). This prediction is directed against the Babylonian deities’ claim to possess the power of destiny and the future, predominantly against Bel-Marduk, to whom both Nabonidus and his opponents appeal in their various political assertions regarding Cyrus. According to the Babylonian conviction, Bel-Marduk has the universal divine power, who, on the one hand, directs the course of the stars and thus determines the astral omens and, on the other hand, directs the course of history (cf. Cyrus Cylinder). As an antithesis, however, Deutero-Isaiah proclaims Yhwh as the sovereign divine creator and leader of the courses of the stars in heaven as well as the course of history on earth (Isa 45:12–13). Moreover, the conflict between Nabonidus and the Marduk priesthood over the question of the highest divine power (Sîn versus Marduk) may have had a kind of “catalytic” function in Deutero-Isaiah’s formulation of the monotheistic confession.

scholarly journals I.—Notes on the Phylogeny of the Graptolites

1895 ◽  
Vol 2 (12) ◽  
pp. 529-539 ◽  
Author(s):  
H. A. Nicholson ◽  
J. E. Marr
Keyword(s):  
Present State ◽  
The Other ◽  
Other Hand ◽  
The Family ◽  
The Future ◽  
Geological Magazine

Since the remarkable paper by Professor Lapworth “On an Improved Classification of the Rhabdophora” was published in the Geological Magazine for 1873, a great deal of fresh information has been gathered as to these interesting fossils; but the classification given in that paper, though to some extent confessedly artificial, is still generally adhered to. Observations made by the authors in recent years lead them to suppose that that classification will in the future undergo considerable modification; but in the present state of our knowledge it serves a purpose so useful, that it is not our intention to propose any immediate change in it. Our object, on the other hand, is to bring forward certain conclusions which we have independently reached, and which will, we believe, enhance the value of Graptolites to the stratigraphical geologist, and lead to results important to the biologist. Our conclusions are based upon an examination of a large number of forms generally referred to the family Dichograptidæ; but, as we propose very briefly to indicate, they affect the relationships of Graptolites belonging to other families also.

Capital Budgeting and business cycles

2021 ◽  
pp. 315-335
Author(s):  
Edward W. Fuller
Keyword(s):  
Interest Rate ◽  
Demand Curve ◽  
Supply And Demand ◽  
Investment Project ◽  
The Other ◽  
Investment Projects ◽  
Scarce Resources ◽  
Other Hand ◽  
The Future ◽  
The Interest Rate

Every investment project is aimed at achieving some future goal. This goal can only be attained by employing scarce resources, like time. Every investment project entails foregoing other investment projects. It is impossible to undertake all investment projects simultaneously because resources are scarce. This means each investment project is subject to cost. The investment project may be unsuccessful in achieving the future goal and the entrepreneur may suffer a loss. On the other hand, investment projects are only undertaken because they are perceived as more valuable than their costs. Every investment project undertaken implies the possibility of earning a profit. Investment projects take time. An investment project can be represented by a time line. Time A represents the beginning of the production process. Time B is the end of the production pro-cess. Line AB is called the period of production. Present goods are scarce resources that can be consumed im-mediately. On the other hand, future goods cannot be consumed immediately. Future goods are only expected to be consumer goods at some point in the future. An investment project entails making an investment at time A and receiving a present good at time B. All else equal, present goods are more valuable than future goods.1 Any good at time A is more valuable than the same good at time B. This is called time preference. Money is the present good par excellence. Therefore, future goods can be called future cash flows. All else equal, present money is more valuable than future money. This is called the time value of money. The interest rate is the price of present goods in terms of future goods. The interest rate is the price which equates the amount of present goods provided by savers with the amount of present goods demanded by investors. Like all prices, the interest rate is determined by supply and demand. Savers are suppliers of present goods. The supply curve (S) is the quantity of present goods supplied at each interest rate. Factor owners (investors) are the demanders, or buyers, of present goods. The demand curve (D) is the quantity of present goods demanded at each interest rate. The intersection of the supply and demand curve determines the interest rate. The interest rate is determined by the supply and demand for present goods:2

Services and Service Composition – An Introduction (Services und Service Komposition – Eine Einführung)

2008 ◽  
Vol 50 (2) ◽  
Author(s):  
Shahram Dustdar ◽  
Mike P. Papazoglou
Keyword(s):  
Web Services ◽  
Service Composition ◽  
Web Applications ◽  
Future Research ◽  
Basic Principles ◽  
Service Oriented Computing ◽  
Research Challenges ◽  
Internet Computing ◽  
The Future ◽  
Service Oriented

SummaryIn this overview paper, we discuss the basic principles underlying service-oriented computing in general, and (Web) services in particular. We discuss the important differences between (Web) services and Web applications and other models in Internet computing. Finally, we discuss where we see the future research challenges in the area of service composition.

scholarly journals Signifikansi Sunah dalam Perspektif Said Nursi Bagi Masyarakat Kontemporer

2017 ◽  
Vol 8 (1) ◽  
pp. 178-200
Author(s):  
Zaprulkhan Zaprulkhan
Keyword(s):  
The Other ◽  
Other Hand ◽  
The Future ◽  
Spiritual Crisis ◽  
And Function ◽  
Meaning And Function ◽  
Said Nursi

This article discusses Bediuzzaman Said Nursi’s ideas on significance of the Practices of the Prophet (Sunna) for modern people. In the present day, many modern people deal with some problems such as spiritual crisis (existential vacuum), moral degradation, and so on. On the other hand, according to Said Nursi, Practices of the Prophet are all highly beneficial remedies for sicknesses of the spirit, mind, and heart, and particularly for social sicknesses. Accordingly, Practices of the Prophet could give the best solution for modern people problems, both individual sicknesses and social sicknesses. Before proposing Said Nursi’s perspective about significance of sunna, the paper forwards epistemological questions: How are the meaning and function of sunna according to Said Nursi? How are the urgent problems of modern people? What is the significance of Practices of the Prophet for modern people in the view of Said Nursi? The answer of these questions will determine the significance of the Practices of the Prophet in our era and in the future.

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