Salih Murat Egi

Salih Murat Egi
Galatasaray Üniversitesi · Department of Computer Engineering

PhD

About

57
Publications
12,688
Reads
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237
Citations
Citations since 2016
24 Research Items
171 Citations
20162017201820192020202120220102030
20162017201820192020202120220102030
20162017201820192020202120220102030
20162017201820192020202120220102030
Additional affiliations
November 2013 - present
DAN Europe
DAN Europe
Position
  • Senior Researcher
May 2003 - November 2013
Galatasaray Üniversitesi
Position
  • V. DEPT CHAIR
February 1990 - December 1999
Bogazici University
Position
  • Research Assistant

Publications

Publications (57)
Conference Paper
This paper presents the work performed to integrate a sensors network to a more complex and extensive system, represented by the architecture that constitutes the main output of the DiveSafe European project (G.A. EASME/EMFF/2017/1.2.1.12/SI/02/ SI2.789635). The latter also includes an underwater scooter, a Docking Station, a tablet and a whole com...
Article
Background The narcotic effect of hyperbaric nitrogen is most pronounced in air-breathing divers because it impairs diver’s cognitive and behavioral performance, and limits the depth of dive profiles. We aimed to investigate the cognitive effects of simulated (500 kPa) air environments in recreational SCUBA divers, revealed by auditory event-relate...
Chapter
Photopletismography (PPG) is a simple, low cost and noninvasive technique, implemented by pulse-oximeters to measures several clinical parameters, such as hearth rate, oxygen saturation (Spo\(_{2}\)), respiration and other clinical diseases. Although monitoring of these parameters at rest does not present particular problems, processing PPG signals...
Conference Paper
Full-text available
In last few years smart watches and activity trackers which count steps, calories, heart rate, and track sleep became the most widely used smart devices. These devices have the potential for not only tracking personal activity but also for creating big databases on health and demographic data collected from users. In this study, a multi-criteria de...
Article
Full-text available
Introduction: The risk for decompression sickness (DCS) after hyperbaric exposures (such as SCUBA diving) has been linked to the presence and quantity of vascular gas emboli (VGE) after surfacing from the dive. These VGE can be semi-quantified by ultrasound Doppler and quantified via precordial echocardiography. However, for an identical dive, VGE...
Article
Full-text available
Diver carried computers are basically designed to measure the depth and time and provide safe ascent profiles in order to avoid decompression sickness in divers. All of the units in the market are based on embedded systems where the user cannot reprogram the units except entering limited number of dive parameters such as the content of cylinders an...
Article
Divers Alert Network Europe has created a database with a large amount of dive-related data that has been collected since 1993 within the scope of the Diving Safety Laboratory citizen science project. The main objectives of this study are the grouping divers by their health information and revealing significant differences in diving parameters usin...
Article
Full-text available
Dive computers have an important potential for citizen science projects where recreational SCUBA divers can upload the depth temperature profile and the geolocation of the dive to a central database which may provide useful information about the subsurface temperature of the oceans. However, their accuracy may not be adequate and needs to be evalua...
Article
Full-text available
Recreational divers use dive computers (DCs) which give information about safe ascent profile in order to prevent decompression illness that may result from decrease in ambient pressure. Dive computer are electronic devices used not only for appropriate ascent from depth but for their extra features such as tank pressure, gas time remaining, compas...
Article
Full-text available
Introduction: Scuba diving is an important marine tourism sector, but requires proper safety standards to reduce the risks and increase accessibility to its market. To achieve safety goals, safety awareness and positive safety attitudes in recreational scuba diving operations are essential. However, there is no published research exclusively focusi...
Conference Paper
Conservation and monitoring of marine systems and large-scale underwater data acquisition are too demanding for single researchers. The exploitation of citizen science and the development of new technology can significantly facilitate these action. In this work a novel system that allows scuba divers to collect data during their leisure activity is...
Article
Full-text available
Drowning is the major cause of death in self-contained underwater breathing apparatus (SCUBA) diving. This study proposes an embedded system with a live and light-weight algorithm which detects the breathing of divers through the analysis of the intermediate pressure (IP) signal of the SCUBA regulator. A system composed mainly of two pressure senso...
Conference Paper
Full-text available
This study is about a system for monitoring the glucose of scuba divers while underwater. The system measures the glucose of the diver at intervals of five minutes and transmits the recorded data to the surface surpervision team. This is specifically beneficial to the diabetic scuba divers, allowing their supervisers to monitor their glucose level...
Conference Paper
Marine researchers need consistent historical and georeferenced data from the marine environment in order to constantly monitor the biological condition of the habitat or to document delicate archeological sites. To overcome the difficulties related to the acquisition of high quantity of worthy data and to the accurate estimation of the position, t...
Article
Full-text available
In order to obtain robust and measurable data from the marine environment, citizen science projects need user-friendly tools that, during dives, autonomously gather information in an easy, low-cost and integrated way. Data collected from different devices and by different untrained divers must have good estimation of the position where the informat...
Article
Full-text available
"CADDY - Cognitive Autonomous Diving Buddy" is an FP7 project that that is devoted to developing a cognitive underwater robotic system that will help divers during their activities in this hazardous environment. The envisioned resulting system will play a threefold role similar to those that a human buddy diver should have: buddy "observer", buddy...
Conference Paper
Divers Alert Network (DAN) created a database (DB) with a big amount of dive related data which has been collected since 1994 within the scope of Dive Safety Laboratory (DSL) project. The aim of this study is to analyze the DB using data mining techniques. The clustering of divers by their health and demographic information and reveal significant d...
Article
Full-text available
Divers operate in harsh and poorlymonitored environments, inwhich the slightest unexpected disturbance, technical malfunction, or lack of attention can have catastrophic consequences. Motivated by these considerations, the “CADDY—Cognitive Autonomous Diving Buddy” FP7 project sets forth the main goal of developing a cooperative autonomous underwate...
Conference Paper
Full-text available
This study is about a system for monitoring the breathing cycles of divers and the functioning of regulators underwater. It warns the diver and other surrounding divers in case of long time cessation of respiration or if the regulator’s intermediate pressure is out of predefined limits, enabling immediate intervention to regulator and breathing pro...
Conference Paper
Full-text available
"CADDY - Cognitive Autonomous Diving Buddy" is an FP7 project that started in January 2014. Seven partner institutions have joined their efforts towards developing a cognitive underwater robotic system that will help divers during their activities in this hazardous environment. The resulting system will play a threefold role similar to those that a...
Conference Paper
Full-text available
This paper summarizes the main accomplishments of the first year of the FP7 project “CADDY — Cognitive Autonomous Diving Buddy”. The main objective of the project is to replace a human buddy diver with an autonomous underwater vehicle and add an autonomous surface vehicle to improve monitoring, assistance, and safety of the diver's mission. While a...
Conference Paper
The main objective of the CADDY project is to replace a human buddy diver with an autonomous underwater vehicle and add a new autonomous surface vehicle to improve monitoring, assistance, and safety of the diver's mission. However, the use of robots underwater may also bring additional safety requirements. Within the scope of this research, the exi...
Article
Full-text available
Introduction: Personnel selection for different commercial diving jobs is time-consuming and subjective, This paper proposes a combination of two multiple-criteria decision-making (MCDM) methods to provide an objective tool for evaluation according to two main selection criteria: work experience and physical fitness. Method: Subcriteria were com...
Article
Diving above sea level has different motivations for recreational, military, commercial and scientific activities. Despite the apparently wide practice of inland diving, there are three major discrepancies about diving at altitude: threshold elevation that requires changes in sea level procedures; upper altitude limit of the applicability of these...
Conference Paper
Full-text available
One of the major problems in dive data collection is the fact that the dive computers used in data collections do not have a practical interface. The divers first needs to buy a cable and a software; then after each dive they have to connect their dive computer to a desktop or a portable computer and transmit their logs to the databases. This proje...
Presentation
Full-text available
The current onshore commercial diving systems still prefer to use analog panels with pneumogauges to measure the depth of the divers. The major drawback of these systems is to record manually the profile. Although the profile often is a square, emergency events and unplanned extra tasks may deviate the square profile and it may be impossible to rec...
Article
The existence of a right-to-left shunt may increase the likelihood of micro-embolism by allowing a flux of bubbles under hyperbaric conditions. The aim of the study was to measure the relationship between these shunts and bubbles in 10 consecutive subjects using trans-thoracic and trans-esophageal echocardiography. In video frames, all cardiac cham...
Conference Paper
Sualtında çalışan elektronik cihaz dendiğinde dalgıçlarca en çok kullanılan ekipmanlardan birisi dalış bilgisayarıdır. Dalış bilgisayarları, bir sualtı elektronik ekipmanı olarak dalgıçların tehditlerinden biri olan dekompresyon hastalığından korunmaları için kolaylık sağlar. Temel olarak görevi tabloların matematiksel modellerini kullanarak dokula...
Conference Paper
Full-text available
Dive computers (DCs) are compact digital devices which perform the task of decompression management without the need for a watch or dive tables. As the diving industry grows, the number of different DCs in the market increases and users have many alternatives to select an effective one among them. Considering that it is a life supporting device, se...
Article
Full-text available
Bubble recognition is a challenging problem in a broad range from mechanics to medicine. These gas–filled structures whose pattern and morphology alter in their surrounding environment would be counted either manually or with computational recognition procedures. In cardiology, user dependent bubble detection and temporal counting in videos require...
Conference Paper
Full-text available
The selection of personnel for diving operations is a challenging task requiring a detailed assessment of the candidates. In this study, we use computer aided multi-criteria decision support tools in order to evaluate the divers according to their work experience and physical fitness condition. The importance weights of the sub-criteria are determi...
Conference Paper
2D echocardiography which is the golden standard in clinics becomes the new trend of analysis in diving via its high advantages in portability for diagnosis. By the way, the major weakness of this system is non-integrated analysis platform for bubble recognition. In this study, we developed a full automatic method to recognize bubbles in videos. Ga...
Article
Full-text available
In cardiology, automatic recognition and image analysis still conserve computational challenges in terms of medical guidance and diagnosis. Bubbles or microemboli that circulate into cardiopulmonary system are considered suspicious for several medical problems such as decompression sickness, stroke and migraine. The aim of our work is to develop an...
Conference Paper
Post decompression records in echocardiography are considered to detect micro bubbles and to survey unexplained decompression sickness which is commonly examined by standardized methods such as dive computers and tables. In this study, existent bubbles are detected on transthoracic echicardiografic frames recorded after recreational diving. Bubble...
Article
The term decompression illness (DCI) describes maladies resulting from inadequate decompression, but there is little consensus concerning clinically useful DCI subclasses. Our aim was to explore an objective DCI classification using multivariate statistics to assess naturally associated clusters of DCI manifestations. We also evaluated their mappin...
Conference Paper
Full-text available
We have previously suggested a classification of DCI using multivariate statistics to assess naturally associated clusters of signs and symptoms based on 1929 cases reported by hyperbaric chambers to the Divers Alert Network from 1999 to 2003. The aim of this study is to validate the reliability of the previous work by applying three different alte...
Article
Several illnesses such as paradoxical embolism, decompression sickness, migraine and cerebral ischemia are characterized by bubbles which might cross the septum wall between left and right atrium. In this study, we aimed to detect bubbles on echocardiographic frames which are segmented automatically using Snakes method. In recent studies, analyzes...
Article
Full-text available
Despite the abundance of telemetric applications for ecology, behavior and physiology of marine life, few efforts were reported about the use of acoustic telemetry for SCUBA divers. The objective of this study is to design and test an acoustic telemetry system for monitoring breathing gases of a Dräger Dolphin semi-closed circuit rebreather as well...
Article
Full-text available
It is possible to detect venous gas bubbles by listening to the Doppler audio signals. However, a serious disadvantage of the audio evaluation is the inability of continuous monitoring and the inter-rater agreement. Several researchers have worked on the automated detection of emboli, but no current system has the required sensitivity and specifici...
Article
Full-text available
In 1990, Boğaziçi University (Istanbul, Turkey) launched an altitude diving program to develop techniques and safe decompression profiles for diving at high terrestrial altitudes. Following pioneering diving expeditions to lakes at high elevations in 1990-1992, it was deemed necessary to calculate new tables. Bottom time limits for dives requiring...
Article
Decompression sickness (DCS) is the result of bubble formation in the body due to excessive/rapid reduction in the ambient pressure. Existing models relate the decompression stress either to the inert gas load or to the size of a single bubble in a tissue compartment. This paper presents a model that uses the gas exchange equations combined with bu...
Article
There is no consensus on the number of compartments and the half-lives (T1/2) used in the calculation of inert gas exchange and decompression sickness (DCS) boundary in existing dive tables and decompression computers. We propose the use of a continuous variable for the tissue half-lives, allowing the simulation of an infinite number of compartment...
Conference Paper
In this study, fat free mass (FFM) and % fat were assessed by multisite, multifrequency bioimpedance analysis (BIA), on divers who took part in the altitude diving research program at Mountain Kackar (3412 m). Impedances were measured from different sites (limbs and trunk) at 5 frequencies using a custom made 4-probe impedance analyzer. Skinfold an...
Article
Diving at altitude requires different tables from those at sea level due to the reduction in surface ambient pressure. Several algorithms extrapolating sea-level diving experimental data have been proposed to construct altitude diving tables. The rationale for these algorithms is reviewed together with the conservatism of the resulting tables and d...
Article
Full-text available
In brain and neck surgery, media where the ambient pressure changes significantly like SCUBA diving and high altitude activities, "Venous Gas Embolism (VGE)" may occur. When VGE occurs, the air bubbles start to navigate within the blood circulatory system. They are first collected at the right site of heart. Then the blood in the right ventricle is...
Article
Full-text available
Considering the sweeping changes that modern technology is creating in daily life, the authors argue that extra-curricula activities can help enhance the quality of engineering education. Students working with their teachers on projects relevant to society as a whole can be better motivated to commit themselves to a life-long education programme. S...

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