Analysing the effect of security on information quality dimensions

Information quality (IQ) has become a critical concern in today’s organisations. Although recent studies of information systems indicate an increasing importance of IQ, foremost research is still limited. Indeed, little is known about the impact of various design decisions on IQ. Recent research shows that security measures are increasingly important for any information system; however security measures are often introduced without considering the effect on IQ. At the same time, literature provides us with indications that trade-offs between various IQ dimensions exist. In this article we aim to investigate how security measures impact on different IQ dimensions. We carried out an experiment, which indicates that security measures have a significant effect on timeliness, whereas other dimensions are not particularly influenced. This observation led us to the proposal of costbenefit considerations, an important aspect for IQ management. The study is valuable for both research and practitioners. Further research studies can build on our observations and extend the research. Practitioners are provided with arguments for considering IQ trade-offs in relation to security measures

A Content-Based Pricing Model for Municipal and Community Wireless Networks

The escalation of municipal and community wireless networks (CWNs) has raised many questions about the most suitable business model, funding instrument, and service pricing policy for a specific community. Unlike traditional Internet service providers, these networks provide wireless Internet access for the purpose of boosting the social and economic development of the community at large. Therefore, such projects need customized business models and pricing policies in order to achieve these objectives. We propose a content-based pricing model where the price of wireless applications is an increasing function of the used bandwidth and a decreasing function of the provided packet delay. We used the Opnet simulation tool to validate the proposed pricing model. The simulation results show that network operators may charge users only for audio and video applications because of the high bandwidth they use compared to data applications. The proposed pricing solution considers the social and economic objectives of CWNs

A Graph Theoretic Approach for Analysis and Design of Community Wireless Networks

Community Wireless Networks (CWNs) have recently emerged as a top priority for many communities world-wide to access the information highway and bridge the digital divide. There are many factors that contribute to the development and the sustainability of a successful CWN. These factors include traditional technical network parameters in addition to several social and economic parameters. This paper proposes a two-graph model for describing CWNs. The proposed graph model uses well established graph concepts to depict the key factors needed to be addressed when analyzing and designing CWN. We show how the two graphs; the social network graph and the wireless network graph are used to model CWN factors. We also show how the proposed model was used in a case study to support the Omaha Wireless project. We argue that having such a quantitative model represents a significant step towards better understanding of CWN and advancing this timely research area

In Situ Surgery: Is It Safe ? (Experience with 60 cases)

Background/Purpose: Neonatal surgical unit (NSU) is the area of a hospital where sick babies having surgical problem go once they are born. Performing in-situ surgery (ISS) in the NSU is relatively a new concept that is gaining popularity in the last decade. Critically ill neonates who are too ill to transfer to the operating room can undergo safe surgery in the NSU environment of a fully-equipped pediatric hospital. Transfer of the critically ill neonates is time consuming, utilizing manpower and requiring suitable portable ventilators and extensive monitoring equipments. Materials & Methods: This is a prospective study conducted on 60 neonates admitted in the surgical neonatal unit of the Cairo University pediatric hospital (Abou-Elrish) and where subjected to surgical procedures in the unit itself. The patients were categorized into 3 groups: The First group was the group at the beginning of the study for which minor procedures were selected. The second group was those neonates that were operated upon on emergency base for which transfer could be hazardous. The last group included those patients on high settings of ventilation and critically ill neonates with extensive monitoring. Results: There was no mortality in the study related to the procedures itself. Group I patients: the time of the surgical procedures was longer than that in the OR and no increase in the infection rate was noticed. Group II in which emergency procedures were carried on showed also increase in operating time but better perioperative circumstances regarding secondary insult to viable structures & less infection rate. Group III: no significant change in outcome in comparison to cases transferred to OR except that the perioperative circumstances were better for the surgeon, anesthesiiologist & nursing teams. Conclusion: NSU is a safe place for performing in-situ surgery (ISS) without increased risk of infection. Successful operative intervention within NSU requires good planning and cooperation between anesthesiologist, surgeons, neonatologist and nursing staff. Maximum benefit is observed in neonates who have definite risk attached to transfer to operating room. Index Word: In-Situ Surgery (ISS) – Neonatal Surgical Unit (NSU)

LINC based amplifier architectures for power efficient wireless transmitters

Wireless communication trends Performance measuring of a communication system Power amplifiers and transmitters Power efficiency enhancement techniques Design and Optimization of LINC transmitter for OFDM applications LINC concept LINC signal decomposition LINC efficiency and combiner technologies Design optimization of LINC system Mismatch (imbalance) effects Advanced LINC transmitter architectures The 2X1 LINC transmitter system The 2X2 LINC transmitter system Mismatch effects

History matters: the origins of biophilic design of innovative learning spaces in traditional architecture

Recent empirical studies have shown a positive correlation between nature, the built environment and creativity in the human brain. During the medieval Islamic Golden Era, higher education buildings of non-medical ‘madrasa’ and medical ‘bimaristan’ institutions applied specific techniques and strategies so that human intellectual curiosity could flourish through direct and indirect contact with nature. In contrast, the architecture of modern universities has lessened students’ multi sensory focus and engagement with nature. Several studies have addressed these institutions’ failure to foster the innovation-generation process. This systematic review summarises and synthesises previous studies, elaborating the characteristics of those spaces that can host Innovation-Generation Processes (IGPs) based on psychological and neurological investigation. The study analyses research outcomes that support the stimulative impact of nature on people’s cognitive capacities. This demonstrates that the biophilic design approach utilises natural conditions and elements within the built environment to enhance the physical, social, intellectual and psychological status of innovators. The findings of this study demonstrate a strong interrelationship between IGPs and the built environment in traditional higher education institutions based on the premise of biophilic design. Hence, we can adopt some lessons from these ‘timeless’ buildings to support the evolution of innovative university campuses today.Mohamed S. Abdelaal, Veronica Soebart

The death of modern hospitals: Towards a comprehensive approach for restorative healthcare environmental design

This study criticises the design strategies of today’s so-called sustainable hospitals which mainly focus on reducing the hospitals’ adverse impact on the environment and energy consumption rates. Based on a review of the historical literature, the study offers an alternative approach to treating a true sustainable hospital, a restorative environment that connects human health with nature by combining salutogenic and biophilic design principles with restorative environmental design strategies. The positive impacts of biophilia, the inherent human affinity to affiliate with nature, on both humans and nature have been demonstrated through rigorous and empirical studies over the past 40 years. In 2008, Restorative Environmental Design (RED) was introduced by Stephen Kellert to integrate biophilia and environmental design principles to have a more beneficial impact on both building users and the surrounding environment. Still, implementing this approach in design practice is a challenging mission. Green building and evidence-based design principles are the main guidelines used by architects and planners to design hospitals, but little attention is given to improving the relationship between building users and nature. Further research is therefore required to facilitate implementing the RED approach in healthcare design. RED is based on Stephen Kellert’s biophilic design attributes which need to be tailored to fit the complex needs of healthcare architecture and to consider restorative environment design principles. This study addresses common ground between biophilic design and salutogenic design by taking a comparative approach, exploring two case studies of recently constructed hospitals in Australia and Singapore to generate a comprehensive design framework. The targeted Restorative Healthcare Environmental Design (RHED) should be tested as a suggested model in introducing biophilic design to the healthcare design and planning community in a realistic and practical way. However, a more comprehensive assessment of the proposed framework is needed.Mohamed S. Abdelaal, Veronica Soebart

Predicting the potential current and future distribution of the endangered endemic vascular plant primula boveana decne. ex duby in Egypt

Knowledge about population attributes, current geographic distribution, and changes over predicted climate change for many threatened endemic vascular plants is particularly limited in arid mountain environments. Primula boveana is one of the rarest and threatened plants worldwide, surviving exclusively in Saint Catherine Protectorate in the Sinaic biogeographic subsector of Egypt. This study aimed to define the current state of P. boveana populations, predict its current potential distribution, and use the best-model outputs to guide in field sampling and to forecast its future distribution under two climate change scenarios. The MaxEnt algorithm was used by relating 10 occurrence-points with different environmental predictors (27 bioclimatic, 3 topographic, and 8 edaphic factors). At the current knowledge level, the population size of P. boveana consists of 796 individuals, including 137 matures, distributed in only 250 m2. The Canonical Correlation Analysis (CCorA) displayed that population attributes (density, cover, size index, and plant vigor) were positively correlated with elevation, precipitation, and pH. Based on the best-fitting model, most predicted suitable central sites (69 km2) of P. boveana were located in the cool shaded high-elevated middle northern part of St. Catherine. Elevation, precipitation, temperature, and soil pH were the key contributors to P. boveana distribution in Egypt. After field trips in suitable predicted sites, we confirmed five extinct localities where P. boveana has been previously recorded and no new population was found. The projected map showed an upward range shift through the contraction of sites between 1800 and 2000 m and expansion towards high elevation (above 2000 m) at the southern parts of the St. Catherine area. To conserve P. boveana, it is recommended to initiate in situ conservation through reinforcement and reintroduction actions

Giant parathyroid adenoma: A case report and review of the literature

Background: Giant parathyroid adenoma is a rare type of parathyroid adenoma defined as weighing > 3.5 g. They present as primary hyperparathyroidism but with more elevated laboratory findings and more severe clinical presentations due to the larger tissue mass. This is the first reported case of giant parathyroid adenoma from the Middle East. Case presentation: A 52-year-old Indian woman presented with a palpable right-sided neck mass and generalized fatigue. Investigations revealed hypercalcemia with elevated parathyroid hormone and an asymptomatic kidney stone. Ultrasound showed a complex nodule with solid and cystic components, and Sestamibi nuclear scan confirmed a giant parathyroid adenoma. Focused surgical neck exploration was done and a giant parathyroid adenoma weighing 7.7 gm was excised. Conclusions: Giant parathyroid adenoma is a rare cause of primary hyperparathyroidism and usually presents symptomatically with high calcium and parathyroid hormone levels. Giant parathyroid adenoma is diagnosed by imaging and laboratory studies. Management is typically surgical, aiming at complete resection. Patients usually recover with no long-term complications or recurrence. - 2019 The Author(s).Scopu