232 research outputs found
Green Cellular Network Deployment To Reduce RF Pollution
As the mobile telecommunication systems are growing tremendously all over the
world, the numbers of handheld and base stations are also rapidly growing and
it became very popular to see these base stations distributed everywhere in the
neighborhood and on roof tops which has caused a considerable amount of panic
to the public in Palestine concerning wither the radiated electromagnetic
fields from these base stations may cause any health effect or hazard. Recently
UP High Court in India ordered for removal of BTS towers from residential area,
it has created panic among cellular communication network designers too. Green
cellular networks could be a solution for the above problem. This paper deals
with green cellular networks with the help of multi-layer overlaid hierarchical
structure (macro / micro / pico / femto cells). Macrocell for area coverage,
micro for pedestrian and a slow moving traffic while pico for indoor use and
femto for individual high capacity users. This could be the answer of the
problem of energy conservation and enhancement of spectral density also.Comment: 6 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:1204.2101, arXiv:1110.2627, and with arXiv:0803.0952 and
arXiv:0803.0952 by other author
Design of Slotted Circle Split Ring Micro Strip Patch Antenna Connected with Rectangular Shaped Meta Material Structure to Enhance Parameters at 1.8 GHz
This paper extends for Rectangular Micro strip Patch Antenna (RMPA) along with Meta material which has Design of âSlotted Circle Split Ring with Rectangularâ proposed for better improvement in the impedance bandwidth and reduction in the return loss at operating frequency 1.8GHz. The proposed antenna is designed at a height 3.2 mm from the ground plane by using CST-MWS software. Â At 1.8 GHz the bandwidth is increased up to 30MHz in comparison to RMPA alone. The Return loss of proposed antenna is reduced by-36.95dB. This antenna is small size, cheap, compact and easy to fabricate, and achieve good radiation characteristics with higher return loss. In this paper, return loss basically defined as system becomes stable with reduced return loss.
Face and content validity of a novel, web-based otoscopy simulator for medical education.
BACKGROUND: Despite the fact that otoscopy is a widely used and taught diagnostic tool during medical training, errors in diagnosis are common. Physical otoscopy simulators have high fidelity, but they can be expensive and only a limited number of students can use them at a given time.
OBJECTIVES: 1) To develop a purely web-based otoscopy simulator that can easily be distributed to students over the internet. 2) To assess face and content validity of the simulator by surveying experts in otoscopy.
METHODS: An otoscopy simulator, OtoTrainâ˘, was developed at Western University using web-based programming and Unity 3D. Eleven experts from academic institutions in North America were recruited to test the simulator and respond to an online questionnaire. A 7-point Likert scale was used to answer questions related to face validity (realism of the simulator), content validity (expert evaluation of subject matter and test items), and applicability to medical training.
RESULTS: The mean responses for the face validity, content validity, and applicability to medical training portions of the questionnaire were all â¤3, falling between the Agree , Mostly Agree , and Strongly Agree categories. The responses suggest good face and content validity of the simulator. Open-ended questions revealed that the primary drawbacks of the simulator were the lack of a haptic arm for force feedback, a need for increased focus on pneumatic otoscopy, and few rare disorders shown on otoscopy.
CONCLUSION: OtoTrain⢠is a novel, web-based otoscopy simulator that can be easily distributed and used by students on a variety of platforms. Initial face and content validity was encouraging, and a skills transference study is planned following further modifications and improvements to the simulator
A case report and genetic characterization of a massive acinic cell carcinoma of the parotid with delayed distant metastases.
We describe the presentation, management, and clinical outcome of a massive acinic cell carcinoma of the parotid gland. The primary tumor and blood underwent exome sequencing which revealed deletions in CDKN2A as well as PPP1R13B, which induces p53. A damaging nonsynonymous mutation was noted in EP300, a histone acetylase which plays a role in cellular proliferation. This study provides the first insights into the genetic underpinnings of this cancer. Future large-scale efforts will be necessary to define the mutational landscape of salivary gland malignancies to identify therapeutic targets and biomarkers of treatment failure
âIt Takes Two Hands to Clapâ: How Gaddi Shepherds in the Indian Himalayas Negotiate Access to Grazing
This article examines the effects of state intervention on the workings of informal institutions that coordinate the communal use and management of natural resources. Specifically it focuses on the case of the nomadic Gaddi
shepherds and official attempts to regulate their access to grazing pastures in the Indian Himalayas. It is often predicted that the increased presence of the modern state critically undermines locally appropriate and community-based resource management arrangements. Drawing on the work of Pauline Peters and Francis Cleaver, I identify key instances of socially embedded âcommonâ management institutions and explain the evolution of these arrangements
through dynamic interactions between individuals, communities and the agents of the state. Through describing the âliving spaceâ of Gaddi shepherds across the annual cycle of nomadic migration with their flocks I explore the
ways in which they have been able to creatively reinterpret external interventions, and suggest how contemporary arrangements for accessing pasture at different moments of the annual cycle involve complex combinations of the
formal and the informal, the âtraditionalâ and the âmodernâ
A Case Report and Genetic Characterization of a Massive Acinic Cell Carcinoma of the Parotid with Delayed Distant Metastases
We describe the presentation, management, and clinical outcome of a massive acinic cell carcinoma of the parotid gland. The primary tumor and blood underwent exome sequencing which revealed deletions in CDKN2A as well as PPP1R13B, which induces p53. A damaging nonsynonymous mutation was noted in EP300, a histone acetylase which plays a role in cellular proliferation. This study provides the first insights into the genetic underpinnings of this cancer. Future large-scale efforts will be necessary to define the mutational landscape of salivary gland malignancies to identify therapeutic targets and biomarkers of treatment failure
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