Abdurrahman Gümüş’ün Yayınları
Journal Articles |
Kayan, CE; Koksal, TE; Sevinc, A; Gumus, A Deep reproductive feature generation framework for the diagnosis of COVID-19 and viral pneumonia using chest X-ray images Journal Article arXiv preprint arXiv:2304., 10677 , 2023. @article{pop00002n, title = {Deep reproductive feature generation framework for the diagnosis of COVID-19 and viral pneumonia using chest X-ray images}, author = {CE Kayan and TE Koksal and A Sevinc and A Gumus}, year = {2023}, date = {2023-01-01}, journal = {arXiv preprint arXiv:2304.}, volume = {10677}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kayan, CE; Aldogan, KYA; Gumus, A An Intensity and Phase Stacked Analysis of Phase-OTDR System using Deep Transfer Learning and Recurrent Neural Networks Journal Article Applied Optics 62 (7), pp., pp. 1753–1764, 2023. @article{pop00001y, title = {An Intensity and Phase Stacked Analysis of Phase-OTDR System using Deep Transfer Learning and Recurrent Neural Networks}, author = {CE Kayan and KYA Aldogan and A Gumus}, year = {2023}, date = {2023-01-01}, journal = {Applied Optics 62 (7), pp.}, pages = {1753--1764}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Duzyel, O; Catal, MS; Kayan, CE; Sevinc, A; Gumus, A Adaptive resizer-based transfer learning framework for the diagnosis of breast cancer using histopathology images Journal Article Signal, Image and Video Processing, 17 (8), pp. 4561–4570, 2023. @article{pop00004s, title = {Adaptive resizer-based transfer learning framework for the diagnosis of breast cancer using histopathology images}, author = {O Duzyel and MS Catal and CE Kayan and A Sevinc and A Gumus}, year = {2023}, date = {2023-01-01}, journal = {Signal, Image and Video Processing}, volume = {17}, number = {8}, pages = {4561--4570}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Aksoy, E; Cakır, AD; Erol, BA; Gumus, A Real Time Computer Vision Based Robotic Arm Controller with ROS and Gazebo Simulation Environment Journal Article ELECO 2023, 14th International Conference on Electrical and Electronics …, 2023. @article{pop00005n, title = {Real Time Computer Vision Based Robotic Arm Controller with ROS and Gazebo Simulation Environment}, author = {E Aksoy and AD Cakır and BA Erol and A Gumus}, year = {2023}, date = {2023-01-01}, journal = {ELECO 2023, 14th International Conference on Electrical and Electronics …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Altay, A; Gumus, A Real-time superficial vein imaging system for observing abnormalities on vascular structures Journal Article Multimedia Tools and Applications, 2023. @article{pop00006o, title = {Real-time superficial vein imaging system for observing abnormalities on vascular structures}, author = {A Altay and A Gumus}, year = {2023}, date = {2023-01-01}, journal = {Multimedia Tools and Applications}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kayan, CE; Aldogan, KY; Gumus, A A Novel Approach For Analysis of Distributed Acoustic Sensing System Based on Deep Transfer Learning Journal Article arXiv preprint arXiv:2206., 12484 , 2022. @article{pop00004n, title = {A Novel Approach For Analysis of Distributed Acoustic Sensing System Based on Deep Transfer Learning}, author = {CE Kayan and KY Aldogan and A Gumus}, year = {2022}, date = {2022-01-01}, journal = {arXiv preprint arXiv:2206.}, volume = {12484}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Altay, A; Gumus, A Development of Low–Cost Portable Blood Vessel Imaging System Journal Article 2021 Medical Technologies Congress (TIPTEKNO), pp. 1–4, 2021. @article{pop00002c, title = {Development of Low–Cost Portable Blood Vessel Imaging System}, author = {A Altay and A Gumus}, year = {2021}, date = {2021-01-01}, journal = {2021 Medical Technologies Congress (TIPTEKNO)}, pages = {1--4}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Babatain, W; Gumus, A; Wicaksono, I; Buttner, U; El‐atab, N; Rehman, MU; ..., Expandable Polymer Assisted Wearable Personalized Medicinal Platform Journal Article Advanced Materials Technologies, 5 (10), pp. 2000411–2000411, 2020. @article{pop00003h, title = {Expandable Polymer Assisted Wearable Personalized Medicinal Platform}, author = {W Babatain and A Gumus and I Wicaksono and U Buttner and N El‐atab and MU Rehman and ...}, year = {2020}, date = {2020-01-01}, journal = {Advanced Materials Technologies}, volume = {5}, number = {10}, pages = {2000411--2000411}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Yazgan, I; Gümüş, A; Gökkuş, K; Demir, MA; Evecen, S; Sönmez, HA; ..., On the effect of modified carbohydrates on the size and shape of gold and silver nanostructures Journal Article Nanomaterials, 10 (7), pp. 1417–1417, 2020. @article{pop00004f, title = {On the effect of modified carbohydrates on the size and shape of gold and silver nanostructures}, author = {I Yazgan and A Gümüş and K Gökkuş and MA Demir and S Evecen and HA Sönmez and ...}, year = {2020}, date = {2020-01-01}, journal = {Nanomaterials}, volume = {10}, number = {7}, pages = {1417--1417}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
BAKAR, F; SÖNMEZ, HA; EVECEN, S; TURAN, B; DEMİR, MA; GÜMÜŞ, A; ..., Synthesis and Characterization of Pollen Extract Mediated Gold Nanostructures Journal Article Türk Doğa ve Fen Dergisi, 9 (2), pp. 1–8, 2020. @article{pop00005h, title = {Synthesis and Characterization of Pollen Extract Mediated Gold Nanostructures}, author = {F BAKAR and HA SÖNMEZ and S EVECEN and B TURAN and MA DEMİR and A GÜMÜŞ and ...}, year = {2020}, date = {2020-01-01}, journal = {Türk Doğa ve Fen Dergisi}, volume = {9}, number = {2}, pages = {1--8}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Babatain, W; Gumus, A; Wicaksono, I; Buttner, U; El‐atab, N; Rehman, MU; ..., Personalized Healthcare: Expandable Polymer Assisted Wearable Personalized Medicinal Platform (Adv. Mater. Technol. 10/2020) Journal Article Advanced Materials Technologies, 5 (10), pp. 2070064–2070064, 2020. @article{pop00006h, title = {Personalized Healthcare: Expandable Polymer Assisted Wearable Personalized Medicinal Platform (Adv. Mater. Technol. 10/2020)}, author = {W Babatain and A Gumus and I Wicaksono and U Buttner and N El‐atab and MU Rehman and ...}, year = {2020}, date = {2020-01-01}, journal = {Advanced Materials Technologies}, volume = {5}, number = {10}, pages = {2070064--2070064}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Hussain, MM; Gumus, A Activatable electronic component destruction device Journal Article US Patent 10,777,512, 2020. @article{pop00007f, title = {Activatable electronic component destruction device}, author = {MM Hussain and A Gumus}, year = {2020}, date = {2020-01-01}, journal = {US Patent 10,777,512}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Khan, SM; Gumus, A; Nassar, JM; Hussain, MM CMOS enabled microfluidic systems for healthcare based applications Journal Article Advanced Materials, 30 (16), pp. 1705759–1705759, 2018. @article{pop00009e, title = {CMOS enabled microfluidic systems for healthcare based applications}, author = {SM Khan and A Gumus and JM Nassar and MM Hussain}, year = {2018}, date = {2018-01-01}, journal = {Advanced Materials}, volume = {30}, number = {16}, pages = {1705759--1705759}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bahabry, Rabab R; Hanna, Amir N; Kutbee, Arwa T; Gumus, Abdurrahman; Hussain, Muhammad M Impact of Nickel Silicide Rear Metallization on the Series Resistance of Crystalline Silicon Solar Cells Journal Article Energy Technology, 2018, ISSN: 21944296. @article{Bahabry2018, title = {Impact of Nickel Silicide Rear Metallization on the Series Resistance of Crystalline Silicon Solar Cells}, author = {Rabab R Bahabry and Amir N Hanna and Arwa T Kutbee and Abdurrahman Gumus and Muhammad M Hussain}, doi = {10.1002/ente.201700790}, issn = {21944296}, year = {2018}, date = {2018-01-01}, journal = {Energy Technology}, abstract = {textcopyright 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. The silicon-based solar cell is one of the most important enablers toward high-efficiency, low-cost clean energy resources. Metallization of silicon-based solar cells typically utilizes screen-printed silver-aluminum (Ag-Al), which improves the cells' electrical performance. To date, metal silicide-based ohmic contacts are occasionally used as an alternative candidate only to the front-contact grid lines in crystalline silicon (c-Si)-based solar cells. In this study, we investigate the electrical characteristics of nickel mono-silicide (NiSi)/Cu-Al ohmic contact on the rear side of c-Si solar cells. We observe a significant enhancement in the fill factor of approximately 6.5% for NiSi/Cu-Al rear contacts, thereby leading to an increase in the efficiency by 1.2% compared to Ag-Al. This is attributed to the improvement of the parasitic resistance in which the series resistance decreased by 0.737$Ømega$cm-2. Further, we complement experimental observation with a simulation of different contact resistance values, which shows the NiSi/Cu-Al rear contact to be a promising low-cost metallization for c-Si solar cells with enhanced efficiency.}, keywords = {}, pubstate = {published}, tppubtype = {article} } textcopyright 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. The silicon-based solar cell is one of the most important enablers toward high-efficiency, low-cost clean energy resources. Metallization of silicon-based solar cells typically utilizes screen-printed silver-aluminum (Ag-Al), which improves the cells' electrical performance. To date, metal silicide-based ohmic contacts are occasionally used as an alternative candidate only to the front-contact grid lines in crystalline silicon (c-Si)-based solar cells. In this study, we investigate the electrical characteristics of nickel mono-silicide (NiSi)/Cu-Al ohmic contact on the rear side of c-Si solar cells. We observe a significant enhancement in the fill factor of approximately 6.5% for NiSi/Cu-Al rear contacts, thereby leading to an increase in the efficiency by 1.2% compared to Ag-Al. This is attributed to the improvement of the parasitic resistance in which the series resistance decreased by 0.737$Ømega$cm-2. Further, we complement experimental observation with a simulation of different contact resistance values, which shows the NiSi/Cu-Al rear contact to be a promising low-cost metallization for c-Si solar cells with enhanced efficiency. |
Khan, Sherjeel M; Gumus, Abdurrahman; Nassar, Joanna M; Hussain, Muhammad M Personalized Healthcare: CMOS Enabled Microfluidic Systems for Healthcare Based Applications (Adv. Mater. 16/2018) Journal Article Advanced Materials, 2018. @article{Khan2018a, title = {Personalized Healthcare: CMOS Enabled Microfluidic Systems for Healthcare Based Applications (Adv. Mater. 16/2018)}, author = {Sherjeel M Khan and Abdurrahman Gumus and Joanna M Nassar and Muhammad M Hussain}, doi = {10.1002/adma.201870111}, year = {2018}, date = {2018-01-01}, journal = {Advanced Materials}, abstract = {In article number 1705759, Muhammad M. Hussain and co‐workers present a comprehensive review on the role of CMOS technology for advanced microfluidics‐based personalized healthcare applications. The advanced and reliable CMOS technology offers a miniaturization opportunity to integrate a broad spectrum of devices involving sensors, actuators, and definitely integrated circuits with standard microfluidic components and operations such as flow cytometry, polymerase chain reaction (PCR) tests, immunoassays, and blood chemistry with an overarching objective: affordability. textlessdivtextgreatertextlessimg src="//wol-prod-cdn.literatumonline.com/cms/attachment/147455b4-be56-42b0-8254-3c64903ee303/adma201870111-gra-0001-m.png"/textgreater textless/divtextgreater}, keywords = {}, pubstate = {published}, tppubtype = {article} } In article number 1705759, Muhammad M. Hussain and co‐workers present a comprehensive review on the role of CMOS technology for advanced microfluidics‐based personalized healthcare applications. The advanced and reliable CMOS technology offers a miniaturization opportunity to integrate a broad spectrum of devices involving sensors, actuators, and definitely integrated circuits with standard microfluidic components and operations such as flow cytometry, polymerase chain reaction (PCR) tests, immunoassays, and blood chemistry with an overarching objective: affordability. textlessdivtextgreatertextlessimg src="//wol-prod-cdn.literatumonline.com/cms/attachment/147455b4-be56-42b0-8254-3c64903ee303/adma201870111-gra-0001-m.png"/textgreater textless/divtextgreater |
Bahabry, RR; Hanna, AN; Kutbee, AT; Gumus, A; Hussain, MM Front Cover: Impact of Nickel Silicide Rear Metallization on the Series Resistance of Crystalline Silicon Solar Cells (Energy Technol. 9/2018) Journal Article Energy Technology, 6 (9), pp. 1605–1605, 2018. @article{pop00020, title = {Front Cover: Impact of Nickel Silicide Rear Metallization on the Series Resistance of Crystalline Silicon Solar Cells (Energy Technol. 9/2018)}, author = {RR Bahabry and AN Hanna and AT Kutbee and A Gumus and MM Hussain}, year = {2018}, date = {2018-01-01}, journal = {Energy Technology}, volume = {6}, number = {9}, pages = {1605--1605}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kutbee, Arwa T; Bahabry, Rabab R; Alamoudi, Kholod O; Ghoneim, Mohamed T; Cordero, Marlon D; Almuslem, Amani S; Gumus, Abdurrahman; Diallo, Elhadj M; Nassar, Joanna M; Hussain, Aftab M; Khashab, Niveen M; Hussain, Muhammad M Flexible and biocompatible high-performance solid-state micro-battery for implantable orthodontic system Journal Article npj Flexible Electronics, 2017. @article{Kutbee2017, title = {Flexible and biocompatible high-performance solid-state micro-battery for implantable orthodontic system}, author = {Arwa T Kutbee and Rabab R Bahabry and Kholod O Alamoudi and Mohamed T Ghoneim and Marlon D Cordero and Amani S Almuslem and Abdurrahman Gumus and Elhadj M Diallo and Joanna M Nassar and Aftab M Hussain and Niveen M Khashab and Muhammad M Hussain}, doi = {10.1038/s41528-017-0008-7}, year = {2017}, date = {2017-01-01}, journal = {npj Flexible Electronics}, abstract = {To augment the quality of our life, fully compliant personalized advanced health-care electronic system is pivotal. One of the major requirements to implement such systems is a physically flexible high-performance biocompatible energy storage (battery). However, the status-quo options do not match all of these attributes simultaneously and we also lack in an effective integration strategy to integrate them in complex architecture such as orthodontic domain in human body. Here we show, a physically complaint lithium-ion micro-battery (236 $mu$g) with an unprecedented volumetric energy (the ratio of energy to device geometrical size) of 200 mWh/cm3 after 120 cycles of continuous operation. Our results of 90% viability test confirmed the battery's biocompatibility. We also show seamless integration of the developed battery in an optoelectronic system embedded in a three-dimensional printed smart dental brace. We foresee the resultant orthodontic system as a personalized advanced health-care application, which could serve in faster bone regeneration and enhanced enamel health-care protection and subsequently reducing the overall health-care cost. There is an increasing demand for advanced healthcare electronics. That can be powered by physically flexible, biocompatible and high performance energy storage devices. However, existing technologies do not allow a combination of all favorable attributes in a single system. Now Muhammad Hussain and co-workers from King Abdullah University of Science and Technology in Saudi Arabia show a physically compliant lithium ion micro-battery with an unprecedented high volumetric energy after cycling 120 times. They further integrate the battery module in a 3D printed encapsulation with near-infrared LEDs to demonstrate a smart dental brace. The present orthodontic system may be used as a personalized healthcare device that serves in faster bone regeneration and enhanced enamel healthcare protection with cost benefits.}, keywords = {}, pubstate = {published}, tppubtype = {article} } To augment the quality of our life, fully compliant personalized advanced health-care electronic system is pivotal. One of the major requirements to implement such systems is a physically flexible high-performance biocompatible energy storage (battery). However, the status-quo options do not match all of these attributes simultaneously and we also lack in an effective integration strategy to integrate them in complex architecture such as orthodontic domain in human body. Here we show, a physically complaint lithium-ion micro-battery (236 $mu$g) with an unprecedented volumetric energy (the ratio of energy to device geometrical size) of 200 mWh/cm3 after 120 cycles of continuous operation. Our results of 90% viability test confirmed the battery's biocompatibility. We also show seamless integration of the developed battery in an optoelectronic system embedded in a three-dimensional printed smart dental brace. We foresee the resultant orthodontic system as a personalized advanced health-care application, which could serve in faster bone regeneration and enhanced enamel health-care protection and subsequently reducing the overall health-care cost. There is an increasing demand for advanced healthcare electronics. That can be powered by physically flexible, biocompatible and high performance energy storage devices. However, existing technologies do not allow a combination of all favorable attributes in a single system. Now Muhammad Hussain and co-workers from King Abdullah University of Science and Technology in Saudi Arabia show a physically compliant lithium ion micro-battery with an unprecedented high volumetric energy after cycling 120 times. They further integrate the battery module in a 3D printed encapsulation with near-infrared LEDs to demonstrate a smart dental brace. The present orthodontic system may be used as a personalized healthcare device that serves in faster bone regeneration and enhanced enamel healthcare protection with cost benefits. |
Gumus, A; Alam, A; Hussain, AM; Mishra, K; Wicaksono, I; Sevilla, GA Torres; ..., Expandable Polymer Enabled Wirelessly Destructible High‐Performance Solid State Electronics Journal Article Advanced Materials Technologies, 2 (5), pp. 1600264–1600264, 2017. @article{pop00017cb, title = {Expandable Polymer Enabled Wirelessly Destructible High‐Performance Solid State Electronics}, author = {A Gumus and A Alam and AM Hussain and K Mishra and I Wicaksono and GA Torres Sevilla and ...}, year = {2017}, date = {2017-01-01}, journal = {Advanced Materials Technologies}, volume = {2}, number = {5}, pages = {1600264--1600264}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bahabry, RR; Gumus, A; Kutbee, AT; Wehbe, N; Ahmed, SM; Ghoneim, MT; ..., Current enhancement in crystalline silicon photovoltaic by low-cost nickel silicide back contact Journal Article 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), pp. 602–605, 2016. @article{pop00022bb, title = {Current enhancement in crystalline silicon photovoltaic by low-cost nickel silicide back contact}, author = {RR Bahabry and A Gumus and AT Kutbee and N Wehbe and SM Ahmed and MT Ghoneim and ...}, year = {2016}, date = {2016-01-01}, journal = {2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)}, pages = {602--605}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Lee, Kyu-Tae; Yao, Yuan; He, Junwen; Fisher, Brent; Sheng, Xing; Lumb, Matthew; Xu, Lu; Anderson, Mikayla A; Scheiman, David; Han, Seungyong; Kang, Yongseon; Gumus, Abdurrahman; Bahabry, Rabab R; Lee, Jung Woo; Paik, Ungyu; Bronstein, Noah D; Alivisatos, Paul A; Meitl, Matthew; Burroughs, Scott; Hussain, Muhammad Mustafa; Lee, Jeong Chul; Nuzzo, Ralph G; Rogers, John A Concentrator photovoltaic module architectures with capabilities for capture and conversion of full global solar radiation Journal Article Proceedings of the National Academy of Sciences, 2016, ISSN: 0027-8424. @article{Lee2016, title = {Concentrator photovoltaic module architectures with capabilities for capture and conversion of full global solar radiation}, author = {Kyu-Tae Lee and Yuan Yao and Junwen He and Brent Fisher and Xing Sheng and Matthew Lumb and Lu Xu and Mikayla A Anderson and David Scheiman and Seungyong Han and Yongseon Kang and Abdurrahman Gumus and Rabab R Bahabry and Jung Woo Lee and Ungyu Paik and Noah D Bronstein and Paul A Alivisatos and Matthew Meitl and Scott Burroughs and Muhammad Mustafa Hussain and Jeong Chul Lee and Ralph G Nuzzo and John A Rogers}, doi = {10.1073/pnas.1617391113}, issn = {0027-8424}, year = {2016}, date = {2016-01-01}, journal = {Proceedings of the National Academy of Sciences}, abstract = {Emerging classes of concentrator photovoltaic (CPV) modules reach efficiencies that are far greater than those of even the highest performance flat-plate PV technologies, with architectures that have the potential to provide the lowest cost of energy in locations with high direct normal irradiance (DNI). A disadvantage is their inability to effectively use diffuse sunlight, thereby constraining widespread geographic deployment and limiting performance even under the most favorable DNI conditions. This study introduces a module design that integrates capabilities in flat-plate PV directly with the most sophisticated CPV technologies, for capture of both direct and diffuse sunlight, thereby achieving efficiency in PV conversion of the global solar radiation. Specific examples of this scheme exploit commodity silicon (Si) cells integrated with two different CPV module designs, where they capture light that is not efficiently directed by the concentrator optics onto large-scale arrays of miniature multijunction (MJ) solar cells that use advanced III–V semiconductor technologies. In this CPV + scheme (“+” denotes the addition of diffuse collector), the Si and MJ cells operate independently on indirect and direct solar radiation, respectively. On-sun experimental studies of CPV + modules at latitudes of 35.9886° N (Durham, NC), 40.1125° N (Bondville, IL), and 38.9072° N (Washington, DC) show improvements in absolute module efficiencies of between 1.02% and 8.45% over values obtained using otherwise similar CPV modules, depending on weather conditions. These concepts have the potential to expand the geographic reach and improve the cost-effectiveness of the highest efficiency forms of PV power generation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Emerging classes of concentrator photovoltaic (CPV) modules reach efficiencies that are far greater than those of even the highest performance flat-plate PV technologies, with architectures that have the potential to provide the lowest cost of energy in locations with high direct normal irradiance (DNI). A disadvantage is their inability to effectively use diffuse sunlight, thereby constraining widespread geographic deployment and limiting performance even under the most favorable DNI conditions. This study introduces a module design that integrates capabilities in flat-plate PV directly with the most sophisticated CPV technologies, for capture of both direct and diffuse sunlight, thereby achieving efficiency in PV conversion of the global solar radiation. Specific examples of this scheme exploit commodity silicon (Si) cells integrated with two different CPV module designs, where they capture light that is not efficiently directed by the concentrator optics onto large-scale arrays of miniature multijunction (MJ) solar cells that use advanced III–V semiconductor technologies. In this CPV + scheme (“+” denotes the addition of diffuse collector), the Si and MJ cells operate independently on indirect and direct solar radiation, respectively. On-sun experimental studies of CPV + modules at latitudes of 35.9886° N (Durham, NC), 40.1125° N (Bondville, IL), and 38.9072° N (Washington, DC) show improvements in absolute module efficiencies of between 1.02% and 8.45% over values obtained using otherwise similar CPV modules, depending on weather conditions. These concepts have the potential to expand the geographic reach and improve the cost-effectiveness of the highest efficiency forms of PV power generation. |
Sevilla, GA Torres; Almuslem, AS; Gumus, A; Hussain, AM; Cruz, ME; ..., High performance high-κ/metal gate complementary metal oxide semiconductor circuit element on flexible silicon Journal Article Applied Physics Letters, 108 (9), pp. 94102–94102, 2016. @article{pop00006hb, title = {High performance high-κ/metal gate complementary metal oxide semiconductor circuit element on flexible silicon}, author = {GA Torres Sevilla and AS Almuslem and A Gumus and AM Hussain and ME Cruz and ...}, year = {2016}, date = {2016-01-01}, journal = {Applied Physics Letters}, volume = {108}, number = {9}, pages = {94102--94102}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gumus, Abdurrahman; Ahsan, Syed; Dogan, Belgin; Jiang, Li; Snodgrass, Ryan; Gardner, Andrea; Lu, Zhengda; Simpson, Kenneth; Erickson, David Solar-thermal complex sample processing for nucleic acid based diagnostics in limited resource settings Journal Article Biomedical Optics Express, 2016, ISSN: 2156-7085. @article{Gumus2016, title = {Solar-thermal complex sample processing for nucleic acid based diagnostics in limited resource settings}, author = {Abdurrahman Gumus and Syed Ahsan and Belgin Dogan and Li Jiang and Ryan Snodgrass and Andrea Gardner and Zhengda Lu and Kenneth Simpson and David Erickson}, doi = {10.1364/boe.7.001974}, issn = {2156-7085}, year = {2016}, date = {2016-01-01}, journal = {Biomedical Optics Express}, abstract = {The use of point-of-care (POC) devices in limited resource settings where access to commonly used infrastructure, such as water and electricity, can be restricted represents simultaneously one of the best application fits for POC systems as well as one of the most challenging places to deploy them. Of the many challenges involved in these systems, the preparation and processing of complex samples like stool, vomit, and biopsies are particularly difficult due to the high number and varied nature of mechanical and chemical interferents present in the sample. Previously we have demonstrated the ability to use solar-thermal energy to perform PCR based nucleic acid amplifications. In this work demonstrate how the technique, using similar infrastructure, can also be used to perform solar-thermal based sample processing system for extracting and isolating Vibrio Cholerae nucleic acids from fecal samples. The use of opto-thermal energy enables the use of sunlight to drive thermal lysing reactions in large volumes without the need for external electrical power. Using the system demonstrate the ability to reach a 95°C threshold in less than 5 minutes and maintain a stable sample temperature of +/- 2°C following the ramp up. The system is demonstrated to provide linear results between 10(4) and 10(8) CFU/mL when the released nucleic acids were quantified via traditional means. Additionally, we couple the sample processing unit with our previously demonstrated solar-thermal PCR and tablet based detection system to demonstrate very low power sample-in-answer-out detection.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The use of point-of-care (POC) devices in limited resource settings where access to commonly used infrastructure, such as water and electricity, can be restricted represents simultaneously one of the best application fits for POC systems as well as one of the most challenging places to deploy them. Of the many challenges involved in these systems, the preparation and processing of complex samples like stool, vomit, and biopsies are particularly difficult due to the high number and varied nature of mechanical and chemical interferents present in the sample. Previously we have demonstrated the ability to use solar-thermal energy to perform PCR based nucleic acid amplifications. In this work demonstrate how the technique, using similar infrastructure, can also be used to perform solar-thermal based sample processing system for extracting and isolating Vibrio Cholerae nucleic acids from fecal samples. The use of opto-thermal energy enables the use of sunlight to drive thermal lysing reactions in large volumes without the need for external electrical power. Using the system demonstrate the ability to reach a 95°C threshold in less than 5 minutes and maintain a stable sample temperature of +/- 2°C following the ramp up. The system is demonstrated to provide linear results between 10(4) and 10(8) CFU/mL when the released nucleic acids were quantified via traditional means. Additionally, we couple the sample processing unit with our previously demonstrated solar-thermal PCR and tablet based detection system to demonstrate very low power sample-in-answer-out detection. |
Hussain, MM; Hussain, AM; Nassar, JM; Kutbee, AT; Gumus, A; Hanna, AN Freeform electronics for advanced healthcare Journal Article 2016 9th International Conference on Electrical and Computer Engineering …, 2016. @article{pop00018c, title = {Freeform electronics for advanced healthcare}, author = {MM Hussain and AM Hussain and JM Nassar and AT Kutbee and A Gumus and AN Hanna}, year = {2016}, date = {2016-01-01}, journal = {2016 9th International Conference on Electrical and Computer Engineering …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ahsan, Syed Saad; Gumus, Abdurrahman; Jain, Aadhar; Angenent, Largus T; Erickson, David Integrated hollow fiber membranes for gas delivery into optical waveguide based photobioreactors Journal Article Bioresource Technology, 2015, ISSN: 18732976. @article{Ahsan2015, title = {Integrated hollow fiber membranes for gas delivery into optical waveguide based photobioreactors}, author = {Syed Saad Ahsan and Abdurrahman Gumus and Aadhar Jain and Largus T Angenent and David Erickson}, doi = {10.1016/j.biortech.2015.06.028}, issn = {18732976}, year = {2015}, date = {2015-01-01}, journal = {Bioresource Technology}, abstract = {Compact algal reactors are presented with: (1) closely stacked layers of waveguides to decrease light-path to enable larger optimal light-zones; (2) waveguides containing scatterers to uniformly distribute light; and (3) hollow fiber membranes to reduce energy required for gas transfer. The reactors are optimized by characterizing the aeration of different gases through hollow fiber membranes and characterizing light intensities at different culture densities. Close to 65% improvement in plateau peak productivities was achieved under low light-intensity growth experiments while maintaining 90% average/peak productivity output during 7-h light cycles. With associated mixing costs of ~1. mW/L, several magnitudes smaller than closed photobioreactors, a twofold increase is realized in growth ramp rates with carbonated gas streams under high light intensities, and close to 20% output improvement across light intensities in reactors loaded with high density cultures.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Compact algal reactors are presented with: (1) closely stacked layers of waveguides to decrease light-path to enable larger optimal light-zones; (2) waveguides containing scatterers to uniformly distribute light; and (3) hollow fiber membranes to reduce energy required for gas transfer. The reactors are optimized by characterizing the aeration of different gases through hollow fiber membranes and characterizing light intensities at different culture densities. Close to 65% improvement in plateau peak productivities was achieved under low light-intensity growth experiments while maintaining 90% average/peak productivity output during 7-h light cycles. With associated mixing costs of ~1. mW/L, several magnitudes smaller than closed photobioreactors, a twofold increase is realized in growth ramp rates with carbonated gas streams under high light intensities, and close to 20% output improvement across light intensities in reactors loaded with high density cultures. |
Gumus, A; Lee, S; Ahsan, SS; Karlsson, K; Gabrielson, R; Guglielmo, CG; ..., Lab-on-a-bird: biophysical monitoring of flying birds Journal Article PloS one, 10 (4), pp. 123947, 2015. @article{pop00011c, title = {Lab-on-a-bird: biophysical monitoring of flying birds}, author = {A Gumus and S Lee and SS Ahsan and K Karlsson and R Gabrielson and CG Guglielmo and ...}, year = {2015}, date = {2015-01-01}, journal = {PloS one}, volume = {10}, number = {4}, pages = {123947}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ahsan, Syed Saad; Gumus, Abdurrahman; Erickson, David Stacked waveguide reactors with gradient embedded scatterers for high-capacity water cleaning Journal Article Optics Express, 2015. @article{Ahsan2015a, title = {Stacked waveguide reactors with gradient embedded scatterers for high-capacity water cleaning}, author = {Syed Saad Ahsan and Abdurrahman Gumus and David Erickson}, doi = {10.1364/oe.23.0a1664}, year = {2015}, date = {2015-01-01}, journal = {Optics Express}, abstract = {textcopyright 2015 Optical Society of America. We present a compact water-cleaning reactor with stacked layers of waveguides containing gradient patterns of optical scatterers that enable uniform light distribution and augmented water-cleaning rates. Previous photocatalytic reactors using immersion, external, or distributive lamps suffer from poor light distribution that impedes scalability. Here, we use an external UV-source to direct photons into stacked waveguide reactors where we scatter the photons uniformly over the length of the waveguide to thin films of TiO2-catalysts. We also show 4.5 times improvement in activity over uniform scatterer designs, demonstrate a degradation of 67% of the organic dye, and characterize the degradation rate constant.}, keywords = {}, pubstate = {published}, tppubtype = {article} } textcopyright 2015 Optical Society of America. We present a compact water-cleaning reactor with stacked layers of waveguides containing gradient patterns of optical scatterers that enable uniform light distribution and augmented water-cleaning rates. Previous photocatalytic reactors using immersion, external, or distributive lamps suffer from poor light distribution that impedes scalability. Here, we use an external UV-source to direct photons into stacked waveguide reactors where we scatter the photons uniformly over the length of the waveguide to thin films of TiO2-catalysts. We also show 4.5 times improvement in activity over uniform scatterer designs, demonstrate a degradation of 67% of the organic dye, and characterize the degradation rate constant. |
Gumus, A Bioelectronic systems in studying tissue engineering, real-time biophysical monitoring of birds and point-of-care diagnostics Journal Article Cornell University, 2015. @article{pop00023, title = {Bioelectronic systems in studying tissue engineering, real-time biophysical monitoring of birds and point-of-care diagnostics}, author = {A Gumus}, year = {2015}, date = {2015-01-01}, journal = {Cornell University}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Erickson, David; O'Dell, Dakota; Jiang, Li; Oncescu, Vlad; Gumus, Abdurrahman; Lee, Seoho; Mancuso, Matthew; Mehta, Saurabh Smartphone technology can be transformative to the deployment of lab-on-chip diagnostics Journal Article Lab on a Chip, 2014, ISSN: 14730189. @article{Erickson2014, title = {Smartphone technology can be transformative to the deployment of lab-on-chip diagnostics}, author = {David Erickson and Dakota O'Dell and Li Jiang and Vlad Oncescu and Abdurrahman Gumus and Seoho Lee and Matthew Mancuso and Saurabh Mehta}, doi = {10.1039/c4lc00142g}, issn = {14730189}, year = {2014}, date = {2014-01-01}, journal = {Lab on a Chip}, abstract = {The rapid expansion of mobile technology is transforming the biomedical landscape.The rapid expansion of mobile technology is transforming the biomedical landscape. By 2016 there will be 260 M active smartphones in the US and millions of health accessories and software “apps” running off them. In parallel with this have come major technical achievements in lab-on-a-chip technology leading to incredible new biochemical sensors and molecular diagnostic devices. Despite these advancements, the uptake of lab-on-a-chip technologies at the consumer level has been somewhat limited. We believe that the widespread availability of smartphone technology and the capabilities they offer in terms of computation, communication, social networking, and imaging will be transformative to the deployment of lab-on-a-chip type technology both in the developed and developing world. In this paper we outline why we believe this is the case, the new business models that may emerge, and detail some specific application areas in which this synergy will have long term impact, namely: nutrition monitoring and disease diagnostics in limited resource settings.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The rapid expansion of mobile technology is transforming the biomedical landscape.The rapid expansion of mobile technology is transforming the biomedical landscape. By 2016 there will be 260 M active smartphones in the US and millions of health accessories and software “apps” running off them. In parallel with this have come major technical achievements in lab-on-a-chip technology leading to incredible new biochemical sensors and molecular diagnostic devices. Despite these advancements, the uptake of lab-on-a-chip technologies at the consumer level has been somewhat limited. We believe that the widespread availability of smartphone technology and the capabilities they offer in terms of computation, communication, social networking, and imaging will be transformative to the deployment of lab-on-a-chip type technology both in the developed and developing world. In this paper we outline why we believe this is the case, the new business models that may emerge, and detail some specific application areas in which this synergy will have long term impact, namely: nutrition monitoring and disease diagnostics in limited resource settings. |
Gumus, A; Lee, S; Karlsson, K; Gabrielson, R; Winkler, DW; Erickson, D Real-time in vivo uric acid biosensor system for biophysical monitoring of birds Journal Article Analyst, 139 (4), pp. 742–748, 2014. @article{pop00008f, title = {Real-time in vivo uric acid biosensor system for biophysical monitoring of birds}, author = {A Gumus and S Lee and K Karlsson and R Gabrielson and DW Winkler and D Erickson}, year = {2014}, date = {2014-01-01}, journal = {Analyst}, volume = {139}, number = {4}, pages = {742--748}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Oncescu, V; Lee, S; Gumus, A; Karlsson, K; Erickson, D Autonomous Device for Application in Late-Phase Hemorrhagic Shock Prevention Journal Article PloS one, 9 (2), pp. 89903, 2014. @article{pop00019b, title = {Autonomous Device for Application in Late-Phase Hemorrhagic Shock Prevention}, author = {V Oncescu and S Lee and A Gumus and K Karlsson and D Erickson}, year = {2014}, date = {2014-01-01}, journal = {PloS one}, volume = {9}, number = {2}, pages = {89903}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ahsan, Syed Saad; Gumus, Abdurrahman; Erickson, David Redox mediated photocatalytic water-splitting in optofluidic microreactors Journal Article Lab on a Chip, 2013, ISSN: 14730189. @article{Ahsan2013, title = {Redox mediated photocatalytic water-splitting in optofluidic microreactors}, author = {Syed Saad Ahsan and Abdurrahman Gumus and David Erickson}, doi = {10.1039/c2lc41129f}, issn = {14730189}, year = {2013}, date = {2013-01-01}, journal = {Lab on a Chip}, abstract = {While photocatalytic water-splitting is a promising alternative energy source, low photocatalytic efficiencies in the visible spectrum hinders its widespread deployment and commercialization. Although screening combinations of new materials and characterizing their reaction kinetics offers possible improvements to efficiency, current experiments are challenged by expensive bulky setups and slow recovery of particles downstream. Optofluidics is a good platform for screening Z-scheme catalysts cheaply and rapidly. By alleviating the problems of mass transport it can also potentially increase reaction rates and efficiencies. Here, we demonstrate a novel optofluidic device based on applying catalyst sol-gels on planar channels while measuring the reaction output by monitoring the depletion of the redox mediators. We use our setup to study the kinetics of the TiO 2 -Pt water-splitting reaction mediated by I - /IO 3 - redox pairs under different flow rates. In particular, for TiO 2 -Pt, we show ∼2-fold improvements in reaction rates and efficiencies. textcopyright The Royal Society of Chemistry 2013.}, keywords = {}, pubstate = {published}, tppubtype = {article} } While photocatalytic water-splitting is a promising alternative energy source, low photocatalytic efficiencies in the visible spectrum hinders its widespread deployment and commercialization. Although screening combinations of new materials and characterizing their reaction kinetics offers possible improvements to efficiency, current experiments are challenged by expensive bulky setups and slow recovery of particles downstream. Optofluidics is a good platform for screening Z-scheme catalysts cheaply and rapidly. By alleviating the problems of mass transport it can also potentially increase reaction rates and efficiencies. Here, we demonstrate a novel optofluidic device based on applying catalyst sol-gels on planar channels while measuring the reaction output by monitoring the depletion of the redox mediators. We use our setup to study the kinetics of the TiO 2 -Pt water-splitting reaction mediated by I - /IO 3 - redox pairs under different flow rates. In particular, for TiO 2 -Pt, we show ∼2-fold improvements in reaction rates and efficiencies. textcopyright The Royal Society of Chemistry 2013. |
Gumus, A; Winkler, D; Erickson, D Lab on a bird: autonomous microsystems for in-vivo real-time biophysical monitoring of birds Journal Article Conference on Micro-Total Analysis Systems, 2011. @article{pop00014c, title = {Lab on a bird: autonomous microsystems for in-vivo real-time biophysical monitoring of birds}, author = {A Gumus and D Winkler and D Erickson}, year = {2011}, date = {2011-01-01}, journal = {Conference on Micro-Total Analysis Systems}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gumus, Abdurrahman; Califano, Joseph P; Wan, Alwin M D; Huynh, John; Reinhart-King, Cynthia A; Malliaras, George G Control of cell migration using a conducting polymer device Journal Article Soft Matter, 2010, ISSN: 1744683X. @article{Gumus2010, title = {Control of cell migration using a conducting polymer device}, author = {Abdurrahman Gumus and Joseph P Califano and Alwin M D Wan and John Huynh and Cynthia A Reinhart-King and George G Malliaras}, doi = {10.1039/b923064e}, issn = {1744683X}, year = {2010}, date = {2010-01-01}, journal = {Soft Matter}, abstract = {Control of cell migration is receiving a great deal of attention due to its relevance to the engineering of tissues. Here we report a device that contains a conducting polymer stripe and achieves a continuum of microenvironments for cell growth under the influence of an applied bias. Marked differences are observed in the migration behaviour of bovine aortic endothelial cells (ECs) as a function of location along the polymer stripe, and a 3-fold variation is achieved in EC migration speed and directional persistence time. Moreover, the device induces directional cell migration along the conducting polymer stripe. A gradient in adsorbed fibronectin indicates that a spatial variation in cell adhesion is at play. The ability to control cell migration behaviour using external electrical stimuli highlights the potential of using conducting polymers as "active" substrates for the non-invasive control of cell behaviour. textcopyright 2010 The Royal Society of Chemistry.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Control of cell migration is receiving a great deal of attention due to its relevance to the engineering of tissues. Here we report a device that contains a conducting polymer stripe and achieves a continuum of microenvironments for cell growth under the influence of an applied bias. Marked differences are observed in the migration behaviour of bovine aortic endothelial cells (ECs) as a function of location along the polymer stripe, and a 3-fold variation is achieved in EC migration speed and directional persistence time. Moreover, the device induces directional cell migration along the conducting polymer stripe. A gradient in adsorbed fibronectin indicates that a spatial variation in cell adhesion is at play. The ability to control cell migration behaviour using external electrical stimuli highlights the potential of using conducting polymers as "active" substrates for the non-invasive control of cell behaviour. textcopyright 2010 The Royal Society of Chemistry. |
Wan, Alwin M D; Brooks, Daniel J; Gumus, Abdurrahman; Fischbach, Claudia; Malliaras, George G Electrical control of cell density gradients on a conducting polymer surface Journal Article Chemical Communications, 2009, ISSN: 13597345. @article{Wan2009, title = {Electrical control of cell density gradients on a conducting polymer surface}, author = {Alwin M D Wan and Daniel J Brooks and Abdurrahman Gumus and Claudia Fischbach and George G Malliaras}, doi = {10.1039/b911130a}, issn = {13597345}, year = {2009}, date = {2009-01-01}, journal = {Chemical Communications}, abstract = {We describe a conducting polymer device that can induce electrically controlled density gradients of normal and cancerous cell lines, and hence can be used as a tool for the study of cell-cell interactions.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We describe a conducting polymer device that can induce electrically controlled density gradients of normal and cancerous cell lines, and hence can be used as a tool for the study of cell-cell interactions. |
Miscellaneous |
Hussain, MM; Gumus, A Wearable personalized medicinal platform Miscellaneous 2017. @misc{pop00021b, title = {Wearable personalized medicinal platform}, author = {MM Hussain and A Gumus}, year = {2017}, date = {2017-01-01}, keywords = {}, pubstate = {published}, tppubtype = {misc} } |