An Overview of Location Semantics Technologies and Applications

2015 ◽  
Vol 09 (03) ◽  
pp. 373-393 ◽  
Author(s):  
Shang Ma ◽  
Qiong Liu ◽  
Henry Tang
Keyword(s):  
Coordinate System ◽  
Semantic Information ◽  
Indoor Localization ◽  
Research Directions ◽  
Real Application ◽  
Location Data ◽  
Advantages And Disadvantages ◽  
The World ◽  
Pros And Cons ◽  
Application Requirements

A localization system is a coordinate system for describing the world, organizing the world, and controlling the world. Without a coordinate system, we cannot specify the world in mathematical forms; we cannot regulate processes that may involve spatial collisions; we cannot even automate a robot for physical actions. This paper provides an overview of indoor localization technologies, popular models for extracting semantics from location data, approaches for associating semantic information and location data, and applications that may be enabled with location semantics. To make the presentation easy to understand, we will use a museum scenario to explain the pros and cons of different technologies and models. More specifically, we will first explore users' needs in a museum scenario. Based on these needs, we will then discuss advantages and disadvantages of using different localization technologies to meet these needs. From these discussions, we can highlight gaps between real application requirements and existing technologies, and point out promising localization research directions. Similarly, we will also discuss context information required by different applications and explore models and ontologies for connecting users, objects, and environment factors with semantics. By identifying gaps between various models and real application requirements, we can draw a roadmap for future location semantics research.

Semantic localization

2017 ◽  
Vol 01 (01) ◽  
pp. 1630010 ◽  
Author(s):  
Shang Ma ◽  
Qiong Liu
Keyword(s):  
Domain Knowledge ◽  
Indoor Localization ◽  
System Modeling ◽  
Location Based Services ◽  
Real Application ◽  
Location Data ◽  
Advantages And Disadvantages ◽  
Personalized Services ◽  
Semantic Localization ◽  
Application Requirements

Improvements in sensor and wireless network enable accurate, automated, instant determination and dissemination of a user’s or objects position. The new enabler of location-based services (LBSs) apart from the current ubiquitous networking infrastructure is the enrichment of the different systems with semantics information, such as time, location, individual capability, preference and more. Such semantically enriched system-modeling aims at developing applications with enhanced functionality and advanced reasoning capabilities. These systems are able to deliver more personalized services to users by domain knowledge with advanced reasoning mechanisms, and provide solutions to problems that were otherwise infeasible. This approach also takes user’s preference and place property into consideration that can be utilized to achieve a comprehensive range of personalized services, such as advertising, recommendations, or polling. This paper provides an overview of indoor localization technologies, popular models for extracting semantics from location data, approaches for associating semantic information and location data, and applications that may be enabled with location semantics. To make the presentation easy to understand, we will use a museum scenario to explain pros and cons of different technologies and models. More specifically, we will first explore users’ needs in a museum scenario. Based on these needs, we will then discuss advantages and disadvantages of using different localization technologies to meet these needs. From these discussions, we can highlight gaps between real application requirements and existing technologies, and point out promising localization research directions. By identifying gaps between various models and real application requirements, we can draw a roadmap for future location semantics research.

scholarly journals A Review of Indoor Localization Techniques and Wireless Technologies

2021 ◽  
Author(s):  
Huthaifa Obeidat ◽  
Wafa Shuaieb ◽  
Omar Obeidat ◽  
Raed Abd-Alhameed
Keyword(s):  
Indoor Localization ◽  
Signal Strength ◽  
Review Article ◽  
Time Of Arrival ◽  
Angle Of Arrival ◽  
Detection Techniques ◽  
Advantages And Disadvantages ◽  
Current Localization ◽  
Pros And Cons ◽  
Localization Systems

AbstractThis paper introduces a review article on indoor localization techniques and technologies. The paper starts with current localization systems and summarizes comparisons between these systems in terms of accuracy, cost, advantages, and disadvantages. Also, the paper presents different detection techniques and compare them in terms of accuracy and cost. Finally, localization methods and algorithms, including angle of arrival (AOA), time of arrival (TOA), and recived signal strength (RSS) are introduced. The study contains concepts, requirements, and specifications for each category of methods presents pros and cons for investigated methods, and conducts comparisons between them.

scholarly journals Analysis of internal control models

2014 ◽  
pp. 82-95
Author(s):  
Živilė Simonaitytė
Keyword(s):  
Internal Control ◽  
Advantages And Disadvantages ◽  
Control Models ◽  
Evaluation Models ◽  
The World ◽  
Pros And Cons ◽  
Control Evaluation ◽  
Audit Standards

Internal control evaluation is one of the most important steps of audit. For conducting this step properly internal control evaluation models are used. Every model has its own advantages and disadvantages. Pros and cons of the most popular internal control models, audit standards used in the biggest countries of the world, researches in the field of effective internal control evaluation are analysed in this article. Structure of internal control evaluation is provided. It enables to connect advantages and dilute disadvantages of the most commonly used internal control evaluation models.

Beneficiary and Adverse Effects of Phytoestrogens: A Potential Constituent of Plant Based Diet

2020 ◽  
Vol 26 ◽  
Author(s):  
Sridevi Vaadala ◽  
Naveen Ponneri ◽  
Venkat Shashank Karnam ◽  
Ramachandra Reddy Pamuru ◽  
Mohammed Arifullah
Keyword(s):  
Dairy Products ◽  
Metabolic Disorders ◽  
Hormone Replacement ◽  
Pharmaceutical Drugs ◽  
Adult Males ◽  
Flax Seed ◽  
Green Beans ◽  
The World ◽  
Pros And Cons ◽  
Derivatives Of

Background: Phytoestrogens are non-endocrine, non-steroidal secondary derivatives of plants and consumed through plant-based diet also named as “dietary estrogens”. The major sources of phytoestrogens are soy and soy-based foods, flax seed, chickpeas, green beans, dairy products, etc. The dietary inclusion of phytoestrogen based foods play a crucial role in the maintenance of metabolic syndrome cluster including obesity, diabetes, blood pressure, cancer, inflammation, cardiovascular diseases, postmenopausal ailments and their complications. In recent days, phytoestrogens are the preferred molecules for hormone replacement therapy. On the other hand, they act as endocrine disruptors via estrogen receptor mediated pathways. These effects are not restricted to adult males or females and identified even in development. Objective: Since phytoestrogenic occurrence is high at daily meal for most people from all over the world, they focused to study for its beneficiary effects towards developing pharmaceutical drugs for treating various metabolic disorders by keeping an eye on endocrine disruption. Conclusion: The present review emphasizes the pros and cons of phytoestrogens on human health, which may help to direct the pharmaceutical industry to produce various phytoestrongen based drugs against various metabolic disorders.

Genotypic Methods for HIV Drug Resistance Monitoring: The Opportunities and Challenges Faced by China

2019 ◽  
Vol 17 (4) ◽  
pp. 225-239 ◽  
Author(s):  
Lulu Zuo ◽  
Ke Peng ◽  
Yihong Hu ◽  
Qinggang Xu
Keyword(s):  
Drug Resistance ◽  
Virological Suppression ◽  
Testing Methods ◽  
Hiv Drug Resistance ◽  
Advantages And Disadvantages ◽  
Hiv Epidemic ◽  
Routine Surveillance ◽  
The World ◽  
Global Project ◽  
Hiv 1

AIDS is a globalized infectious disease. In 2014, UNAIDS launched a global project of “90-90-90” to end the HIV epidemic by 2030. The second and third 90 require 90% of HIV-1 infected individuals receiving antiretroviral therapy (ART) and durable virological suppression. However, wide use of ART will greatly increase the emergence and spreading of HIV drug resistance and current HIV drug resistance test (DRT) assays in China are seriously lagging behind, hindering to achieve virological suppression. Therefore, recommending an appropriate HIV DRT method is critical for HIV routine surveillance and prevention in China. In this review, we summarized the current existing HIV drug resistance genotypic testing methods around the world and discussed the advantages and disadvantages of these methods.

scholarly journals Microscopy Methods for Biofilm Imaging: Focus on SEM and VP-SEM Pros and Cons

Biology ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 51
Author(s):  
Michela Relucenti ◽  
Giuseppe Familiari ◽  
Orlando Donfrancesco ◽  
Maurizio Taurino ◽  
Xiaobo Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ion Beam ◽  
Ruthenium Red ◽  
Variable Pressure ◽  
Sem Images ◽  
Advantages And Disadvantages ◽  
Pros And Cons ◽  
Microscopy Techniques ◽  
Scanning Electron

Several imaging methodologies have been used in biofilm studies, contributing to deepening the knowledge on their structure. This review illustrates the most widely used microscopy techniques in biofilm investigations, focusing on traditional and innovative scanning electron microscopy techniques such as scanning electron microscopy (SEM), variable pressure SEM (VP-SEM), environmental SEM (ESEM), and the more recent ambiental SEM (ASEM), ending with the cutting edge Cryo-SEM and focused ion beam SEM (FIB SEM), highlighting the pros and cons of several methods with particular emphasis on conventional SEM and VP-SEM. As each technique has its own advantages and disadvantages, the choice of the most appropriate method must be done carefully, based on the specific aim of the study. The evaluation of the drug effects on biofilm requires imaging methods that show the most detailed ultrastructural features of the biofilm. In this kind of research, the use of scanning electron microscopy with customized protocols such as osmium tetroxide (OsO4), ruthenium red (RR), tannic acid (TA) staining, and ionic liquid (IL) treatment is unrivalled for its image quality, magnification, resolution, minimal sample loss, and actual sample structure preservation. The combined use of innovative SEM protocols and 3-D image analysis software will allow for quantitative data from SEM images to be extracted; in this way, data from images of samples that have undergone different antibiofilm treatments can be compared.

scholarly journals SARS-CoV-2 vaccines strategies: a comprehensive review of phase 3 candidates

npj Vaccines ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Nikolaos C. Kyriakidis ◽  
Andrés López-Cortés ◽  
Eduardo Vásconez González ◽  
Alejandra Barreto Grimaldos ◽  
Esteban Ortiz Prado
Keyword(s):  
Neutralizing Antibodies ◽  
Large Scale ◽  
Vaccine Development ◽  
Rna Virus ◽  
Protein S ◽  
Effective Vaccine ◽  
Phase 3 ◽  
Vaccine Candidates ◽  
Advantages And Disadvantages ◽  
The World

AbstractThe new SARS-CoV-2 virus is an RNA virus that belongs to the Coronaviridae family and causes COVID-19 disease. The newly sequenced virus appears to originate in China and rapidly spread throughout the world, becoming a pandemic that, until January 5th, 2021, has caused more than 1,866,000 deaths. Hence, laboratories worldwide are developing an effective vaccine against this disease, which will be essential to reduce morbidity and mortality. Currently, there more than 64 vaccine candidates, most of them aiming to induce neutralizing antibodies against the spike protein (S). These antibodies will prevent uptake through the human ACE-2 receptor, thereby limiting viral entrance. Different vaccine platforms are being used for vaccine development, each one presenting several advantages and disadvantages. Thus far, thirteen vaccine candidates are being tested in Phase 3 clinical trials; therefore, it is closer to receiving approval or authorization for large-scale immunizations.

Tiny Sips and Walmart—A Dream or a Curse?

2021 ◽  
pp. 251512742199252
Author(s):  
Robert A. Boyle ◽  
Jerome A. Katz ◽  
Patricia G. Bagsby
Keyword(s):  
United States ◽  
New Product ◽  
The United States ◽  
Spring Water ◽  
Doing Business ◽  
The World ◽  
Pros And Cons ◽  
Business Acumen

For entrepreneurs, being offered a distribution deal by Walmart seems like a dream come true. After all, what better way to have a new product quickly appear in thousands of stores all around the United States or maybe even all around the world? This dream became a reality for Marty, the creator of Tiny Sips—a simple, wholesome children’s beverage made from Montana spring water and all-natural ingredients. As the details and conditions related to the distribution deal became apparent, however, Marty soon understood that doing business at that level requires sophisticated entrepreneurial savvy and a great deal of capital. The joy of possibly selling Tiny Sips everywhere suddenly became eclipsed by questions about how to raise enough cash to scale quickly while simultaneously minimizing risk. Marty needed to employ the business acumen necessary to slow down, consider the pros and cons, and make the best decision for his company. The educational focus of this case involves weighing the entrepreneurial risks and rewards of pursuing a deal with a large retailer like Walmart. While this type of opportunity may seem exciting at first glance, a variety of factors must be considered in order to find a thoughtful and sensible path forward.

scholarly journals Privacy vs. Reward in Indoor Location-Based Services

2016 ◽  
Vol 2016 (4) ◽  
pp. 102-122 ◽  
Author(s):  
Kassem Fawaz ◽  
Kyu-Han Kim ◽  
Kang G. Shin
Keyword(s):  
Location Privacy ◽  
Indoor Localization ◽  
Service Providers ◽  
Location Based Services ◽  
Location Information ◽  
Privacy Concerns ◽  
Indoor Location ◽  
Location Data ◽  
Personalized Services ◽  
Privacy Risks

AbstractWith the advance of indoor localization technology, indoor location-based services (ILBS) are gaining popularity. They, however, accompany privacy concerns. ILBS providers track the users’ mobility to learn more about their behavior, and then provide them with improved and personalized services. Our survey of 200 individuals highlighted their concerns about this tracking for potential leakage of their personal/private traits, but also showed their willingness to accept reduced tracking for improved service. In this paper, we propose PR-LBS (Privacy vs. Reward for Location-Based Service), a system that addresses these seemingly conflicting requirements by balancing the users’ privacy concerns and the benefits of sharing location information in indoor location tracking environments. PR-LBS relies on a novel location-privacy criterion to quantify the privacy risks pertaining to sharing indoor location information. It also employs a repeated play model to ensure that the received service is proportionate to the privacy risk. We implement and evaluate PR-LBS extensively with various real-world user mobility traces. Results show that PR-LBS has low overhead, protects the users’ privacy, and makes a good tradeoff between the quality of service for the users and the utility of shared location data for service providers.

Public Facilities Design in Sustainable Ways for Reconstruction Work of Yushu Area

2014 ◽  
Vol 672-674 ◽  
pp. 2195-2210
Author(s):  
Ang Li ◽  
Shu Bin Kan ◽  
Xin Zhang ◽  
Xin Yu Song ◽  
Shi Long Zhang
Keyword(s):  
Design Theory ◽  
Physical Models ◽  
Overall Design ◽  
Public Facilities ◽  
Local Characteristics ◽  
Current State ◽  
Environmental Friendly ◽  
The World ◽  
Facilities Design ◽  
Pros And Cons

The region of Yushu has fragile natural environment. In 2010, it suffered severe damages caused by earthquakes. This paper subject, on the basis of status research of natural and cultural environment in Yushu area and urban public facilities across the world, is aiming at a design attempt of public facilities suitable for Yushu area under the guidance of sustainable-development design theory. After constructing computer models, we made physical models to further test the reliability of our scheme. The overall design acts according to circumstances, and makes it environmental friendly, developmental sustainable, economical, aesthetic, practical and reliable. We also added to our design some local characteristics to make it better integrate into the local natural environmental features so that it could be widely used. In the end, we summarized the pros and cons of the scheme through theoretical analysis of our design process, despite that, in June 2014, we had an on-the-spot investigation in Yushu, and according to its current state of development, we made outlooks of our further scheme practice.

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