Aaron Cohen - Academia.edu (original) (raw)
Papers by Aaron Cohen
Israel Journal of Health Policy Research, 2013
Background: Medical events, such as stroke, limb fractures, joint replacements and spinal injurie... more Background: Medical events, such as stroke, limb fractures, joint replacements and spinal injuries, can lead to acute functional disability at all ages and to chronic disability, especially among the elderly. Rehabilitation is, therefore, essential for the prevention of permanent disability among older individuals. There are international practice guidelines for stroke and hip fracture management, including recommendations that rehabilitation services be an integral part of the provision of treatment in either an inpatient setting or in the community. There are no organized data on provision of rehabilitation services in Israel or on the distribution of these services throughout the country. Such information would be of great assistance in designing these services where they are needed and in making changes in the existing ones where necessary. Methods: Patients aged 65 years or older with stroke or hip fracture were identified through one-day surveys conducted in 2009-2010 in all 26 acute care hospitals in Israel. Data on inpatient and ambulatory rehabilitation services were collected from discharge medical summaries, telephone interviews with the patients or their relatives and reports from the healthcare provider. The extent of rehabilitation services was described and the association between receipt of inpatient rehabilitation and the geographic district based on the patients' listed address was examined in a multivariate analysis. Results: A total of 570 patients with stroke and 768 patients with hip fracture were identified and interviews were conducted in regards to 421 and 672 respectively. Out of the stroke patients 238(56.5%) received inpatient rehabilitation, 46(10.9%) received ambulatory rehabilitation treatment without inpatient phase and 137 (32.5%) received no rehabilitation. In fracture these rates were 494(73.5%), 96(14.3%) and 82(12.2%) respectively. Patients living in districts with lower availability of rehabilitation beds were less likely to receive inpatient rehabilitation after controlling for patient characteristics. Conclusions: Regional disparities in the provision of inpatient rehabilitation care for elderly after an acute episode of stroke or hip fracture were identified and could be partially attributed to the distribution of rehabilitation beds. These findings highlight the need to plan the rehabilitation resources based on the population needs and to routinely monitor the provision of these services.
Proceedings DCC 2002. Data Compression Conference, 2002
We consider source requantization in tw oforms - successive degradation (ie, source fidelity redu... more We consider source requantization in tw oforms - successive degradation (ie, source fidelity reduction) and bit stealing (ie, information embedding) - when no forward planning has been done to facilitate the requantization. We focus on finite-alphabet sources with arbitrary ...
Personnel Review, 2009
Purpose – The purpose of this paper is to present studies on how the demands of work impact the f... more Purpose – The purpose of this paper is to present studies on how the demands of work impact the family – the work-family conflict (WFC) – and how the demands of family life impinge on the workplace –the family-work conflict (FWC). The goal of this paper is to examine the antecedents of the WFC and the FWC in a different
Basic and Applied Social Psychology, 1993
Age and tenure are considered important correlates of organizational com- mitment (OC). However, ... more Age and tenure are considered important correlates of organizational com- mitment (OC). However, the relations between these variables and OC were found to be relatively weak. This meta-analysis examines the relations between age and tenure and OC across different time frames of employment stages. The numbers of samples dealing with the relations between OC and age and between OC and
A brief review of the Advanced Technology Advisory Committee activities in preparation of the rep... more A brief review of the Advanced Technology Advisory Committee activities in preparation of the report to Congress on the potential for advancing automation and robotics technology is documented. The technology is to be used for the Space Station and the US economy. (BCS)
... Pictures. ARTICLE. Auteur(s) : Franck Boccara, Ariel Cohen. Service ... érythropoïèse.Niemeye... more ... Pictures. ARTICLE. Auteur(s) : Franck Boccara, Ariel Cohen. Service ... érythropoïèse.Niemeyer [10] a rapporté une incidence élevée d'dèmes chez les patients prenant un traitement par TZD, dans une étude monocentrique. ...
edmund.yehQyale.edu Abstract - For a multiaccess model with ran- dom packet arrivals and queueing... more edmund.yehQyale.edu Abstract - For a multiaccess model with ran- dom packet arrivals and queueing, we character- ize resource allocation policies which optimize throughput and delay over a fading channel. I. INTRODUCTION We examine an M-user multiaccess communication system where packets arrive in a random manner. The physical channel is a Gaussian multiaccess fad- ing channel with bandwidth W, modelled by
ABSTRACT This paper presents three novel methods for implementing variable data rate (VDR) networ... more ABSTRACT This paper presents three novel methods for implementing variable data rate (VDR) network congestion control (NCC), and compares them with traditional random (RND) drop methods. The proposed methods include: frequency (FRQ), combined random-innerloop frequency-outerloop (CRFRQ), and combined frequency-innerloop random-outerloop (CFRND). A generic model is used for RND drop that approximates congestion avoidance methods that drop packets. These methods allow NCC at intermediate network nodes using novel methods for setting data priority values. This is a first step towards demonstrating the need for stronger and efficient router technology to enhance Quality of Service (QoS) for voice applications. In the examples considered in this paper, the FRQ method reduced outage from 60% with RND to 0% with FRQ with 5 incoming flows through a bandwidth limited threshold of 1000 bits. Mean Opinion Score (MOS) was increased by a factor in the range from 0.2 to 1 on the MOS scale when using FRQ and CRFRQ over RND in the tested scenarios. CFRND performs in a similar manner to RND except it allows packet shrinking to increase network utilization. Network utilization increased by up to 37.5% over the RND method compared with the novel methods in one example where all possible outcomes for RND were analyzed. Computational complexity with the novel methods can yield a speedup from 0.02 ms faster for 1 flow to 0.56 ms faster for 10 flows over traditional lossy compression methods that rely on FFT operations, which are commonly found in lossy voice coders such as Speex, MELPe, and others. Finally, live real-time transport protocol (RTP) congestion tests were performed which confirmed the simulation results that the network congestion control methods achieve higher MOS scores and better QoS.
Israel Journal of Health Policy Research, 2013
Background: Medical events, such as stroke, limb fractures, joint replacements and spinal injurie... more Background: Medical events, such as stroke, limb fractures, joint replacements and spinal injuries, can lead to acute functional disability at all ages and to chronic disability, especially among the elderly. Rehabilitation is, therefore, essential for the prevention of permanent disability among older individuals. There are international practice guidelines for stroke and hip fracture management, including recommendations that rehabilitation services be an integral part of the provision of treatment in either an inpatient setting or in the community. There are no organized data on provision of rehabilitation services in Israel or on the distribution of these services throughout the country. Such information would be of great assistance in designing these services where they are needed and in making changes in the existing ones where necessary. Methods: Patients aged 65 years or older with stroke or hip fracture were identified through one-day surveys conducted in 2009-2010 in all 26 acute care hospitals in Israel. Data on inpatient and ambulatory rehabilitation services were collected from discharge medical summaries, telephone interviews with the patients or their relatives and reports from the healthcare provider. The extent of rehabilitation services was described and the association between receipt of inpatient rehabilitation and the geographic district based on the patients' listed address was examined in a multivariate analysis. Results: A total of 570 patients with stroke and 768 patients with hip fracture were identified and interviews were conducted in regards to 421 and 672 respectively. Out of the stroke patients 238(56.5%) received inpatient rehabilitation, 46(10.9%) received ambulatory rehabilitation treatment without inpatient phase and 137 (32.5%) received no rehabilitation. In fracture these rates were 494(73.5%), 96(14.3%) and 82(12.2%) respectively. Patients living in districts with lower availability of rehabilitation beds were less likely to receive inpatient rehabilitation after controlling for patient characteristics. Conclusions: Regional disparities in the provision of inpatient rehabilitation care for elderly after an acute episode of stroke or hip fracture were identified and could be partially attributed to the distribution of rehabilitation beds. These findings highlight the need to plan the rehabilitation resources based on the population needs and to routinely monitor the provision of these services.
Proceedings DCC 2002. Data Compression Conference, 2002
We consider source requantization in tw oforms - successive degradation (ie, source fidelity redu... more We consider source requantization in tw oforms - successive degradation (ie, source fidelity reduction) and bit stealing (ie, information embedding) - when no forward planning has been done to facilitate the requantization. We focus on finite-alphabet sources with arbitrary ...
Personnel Review, 2009
Purpose – The purpose of this paper is to present studies on how the demands of work impact the f... more Purpose – The purpose of this paper is to present studies on how the demands of work impact the family – the work-family conflict (WFC) – and how the demands of family life impinge on the workplace –the family-work conflict (FWC). The goal of this paper is to examine the antecedents of the WFC and the FWC in a different
Basic and Applied Social Psychology, 1993
Age and tenure are considered important correlates of organizational com- mitment (OC). However, ... more Age and tenure are considered important correlates of organizational com- mitment (OC). However, the relations between these variables and OC were found to be relatively weak. This meta-analysis examines the relations between age and tenure and OC across different time frames of employment stages. The numbers of samples dealing with the relations between OC and age and between OC and
A brief review of the Advanced Technology Advisory Committee activities in preparation of the rep... more A brief review of the Advanced Technology Advisory Committee activities in preparation of the report to Congress on the potential for advancing automation and robotics technology is documented. The technology is to be used for the Space Station and the US economy. (BCS)
... Pictures. ARTICLE. Auteur(s) : Franck Boccara, Ariel Cohen. Service ... érythropoïèse.Niemeye... more ... Pictures. ARTICLE. Auteur(s) : Franck Boccara, Ariel Cohen. Service ... érythropoïèse.Niemeyer [10] a rapporté une incidence élevée d'dèmes chez les patients prenant un traitement par TZD, dans une étude monocentrique. ...
edmund.yehQyale.edu Abstract - For a multiaccess model with ran- dom packet arrivals and queueing... more edmund.yehQyale.edu Abstract - For a multiaccess model with ran- dom packet arrivals and queueing, we character- ize resource allocation policies which optimize throughput and delay over a fading channel. I. INTRODUCTION We examine an M-user multiaccess communication system where packets arrive in a random manner. The physical channel is a Gaussian multiaccess fad- ing channel with bandwidth W, modelled by
ABSTRACT This paper presents three novel methods for implementing variable data rate (VDR) networ... more ABSTRACT This paper presents three novel methods for implementing variable data rate (VDR) network congestion control (NCC), and compares them with traditional random (RND) drop methods. The proposed methods include: frequency (FRQ), combined random-innerloop frequency-outerloop (CRFRQ), and combined frequency-innerloop random-outerloop (CFRND). A generic model is used for RND drop that approximates congestion avoidance methods that drop packets. These methods allow NCC at intermediate network nodes using novel methods for setting data priority values. This is a first step towards demonstrating the need for stronger and efficient router technology to enhance Quality of Service (QoS) for voice applications. In the examples considered in this paper, the FRQ method reduced outage from 60% with RND to 0% with FRQ with 5 incoming flows through a bandwidth limited threshold of 1000 bits. Mean Opinion Score (MOS) was increased by a factor in the range from 0.2 to 1 on the MOS scale when using FRQ and CRFRQ over RND in the tested scenarios. CFRND performs in a similar manner to RND except it allows packet shrinking to increase network utilization. Network utilization increased by up to 37.5% over the RND method compared with the novel methods in one example where all possible outcomes for RND were analyzed. Computational complexity with the novel methods can yield a speedup from 0.02 ms faster for 1 flow to 0.56 ms faster for 10 flows over traditional lossy compression methods that rely on FFT operations, which are commonly found in lossy voice coders such as Speex, MELPe, and others. Finally, live real-time transport protocol (RTP) congestion tests were performed which confirmed the simulation results that the network congestion control methods achieve higher MOS scores and better QoS.