Seminars

See all upcoming seminars in LäsIT and seminar web pages at the homepage for the PhD studentseminars, TDB, Vi2, Theory and Applications Seminars (TAS) @ UpMARC., Department of Mathematics and The Stockholm Logic Seminar.

Licentiatseminarium / Licentiate seminar
Today
Oscar Samuelsson: Fault detection in Water Resource Recovery Facilities
Location: ITC 2446, Time: 13:15

Discussion leader:
Dr. Kris Villez, Departement of Process Engineering, Eawag - the Swiss Federal Institute of Aquatic Science and Technology.

Abstract:
Reliable sensor values are important for resource-efficient control and operations of wastewater treatment processes. Automatic fault detection methods are necessary to monitor the increasing amount of data produced in any modern water resource recovery facility (WRRF). Most on-line measurements exhibit large variations under normal conditions, due to considerable variations in the influent flow. The work reported in this licentiate thesis deals with fault detection in WRRFs.

In the first paper, we studied how Gaussian process regression (GPR), a probabilistic machine learning method, could be applied for fault detection in WRRFs. The results showed that the standard parameter estimation method for GPR suffered from local optima which could be solved by instead estimating the distribution of the parameters with a sequential Monte Carlo algorithm (GPR-SMC). The GPR-SMC allowed for automatic estimation of missing data in a simulated influent flow signal with high noise, which is a representative signal for on-line sensors in WRRFs. In addition, the GPR-SMC provided uncertainty predictions for the estimated data and accurate sensor noise estimates. Care should be taken in selecting a suitable kernel for GPR, since the results were in contrast to the general assumption that prior knowledge can easily be encoded by means of selecting a proper kernel. Here, the autocorrelation graph was found useful as diagnostic tool for selecting a proper kernel.

In the second paper, we studied how active fault detection (AFD) could be used to reveal information about the sensor status. The AFD was implemented by evaluating the change in a dissolved oxygen (DO)-signal caused by the sensor’s automatic cleaning system. Fault signatures were obtained for fouling and several other sensor faults such as a worn out or mechanically damaged membrane. This demonstrates the potential of AFD, not only for fault detection, but also for fault diagnosis. Interestingly, the progression of the sensor bias due to organic biofilm fouling differed depending on the measurement technique used within the DO-sensor. This is new knowledge that is valuable for process control and should be further studied. The AFD was implemented on a full scale system to demonstrate its applicability, which is rarely done in research papers in the field of WRRFs.

DoCS-Seminar
Today
Adnan Al-Anbuky, Director of SeNSe Research Laboratory, Professor of Electrical and Electronic Engineering, Auckland University of Technology: Software Defined Wireless Sensor Network Systems: Towards CPS Intelligence
Location: ITC 1211, Time: 13:15

Abstract: The progress made in the field of Internet of Things (IoT) and Wireless Sensor Networks (WSN) are leading into the more comprehensive and integrated organization of the Cyber Physical Systems (CPS). Both the Cloud and Fog (or Edge-computing) plays important role in extending the capability of wireless sensor networks. This, in effect, enables the virtualization and support intelligence around the various services that the wireless sensor network can offer. Ultimately the goal of transparent coordination between the virtual and physical organizations could be achieved through the two ways communication between the cloud and the WSN using the IoT (or the Internet) connectivity. Timing and synchronization among the system components are of vital importance in coordinating the controlled actions with the events of a highly complex and distributed system. The field is directly associated with wide range of applications such as transportation, farming, horticulture, health, manufacturing, to name few. The talk will discuss the generic conceptual architecture for IoT based WSN system with emphasis on the degree of freedom offered by softwarization, edge computing and network functions virtualization. This will lead into discussing the layered architecture for defining the WSN-SDN initiative. The talk also discusses examples on conceptual use-cases relevant to shared spaces, precision health and vehicular networks.

Bio: Adnan Al-Anbuky is a full professor at AUT-New Zealand and direct the SeNSe research lab. His current research area is around the dynamic interaction of the WSN with the physical phenomenon in capturing the critical events taking into consideration the IoT and cloud support. Adnan has assumed various academic and administrative roles at Auckland University of technology, Canterbury University, Yarmouk University and Baghdad University of Technology. He also spent significant time with Industry for taking the research outcome into commercialization. The later is manifested through his work with Swichtec NZ, Plant and Food, Scion and others. Recently, the involvement in projects like public space ambient intelligence PSAmI, Precision health, and traceability of food condition at inventory has encouraged the contribution towards the concepts of IoT base WSN software-defined infrastructure, and cyber- physical systems. Adnan is a member of the editorial board of number of international journals and scientific groups. He is actively contributing to the organization or operation of numerous local and international events and conferences. He has delivered number of keynote talks and has numerous conference and journal peer reviewed publications.

Vi2 Seminar
Monday 23 Oct
Heung-Kook Choi: Stroke Outcomes are Worse with Larger Leukoaraiosis Volumes
Location: ITC 4307, Time: 14:15

Abstract:
We aimed to generate rigorous graphical and statistical reference data based on volumetric measurements for assessing the relative severity of white matter hyperintensities (WMHs) in patients with stroke. We prospectively mapped WMHs from 2699/5035 patients with first-ever ischemic stroke enrolled consecutively from 11 nationwide stroke centers, from patient (fluid-attenuated-inversion-recovery) MRIs onto a standard brain template set. Using multivariable analyses, we assessed the impact of major and minor risk factors on WMH variability. We have produced a large reference data library showing the location and quantity of WMHs as topographical frequency-volume maps. This easy-to-use graphical reference data set allows the quantitative estimation of the severity of WMH as a percentile rank score. For all patients, multivariable analysis showed that age, hypertension, atrial fibrillation, and left ventricular hypertrophy were independently associated with increasing WMH. We have generated a novel graphical WMH grading system, correlated to risk factors and adjusted for age/hypertension.

Find more information here: https://doi.org/10.1161/STROKEAHA.114.006662, and here: https://doi.org/10.1093/brain/aww259

Vi2 Seminars Group
Anders Hast
Petter Ranefall

URL: http://www.cb.uu.se/seminars

InfoLab - Weekly Meeting
Monday 23 Oct
Khalid Mahmood: A NoSQL Data Store for Scalable Log Analysis
Location: ITC 19 120, Time: 15:15

Every Monday we meet in room 120, House 19 to discuss various topics of interest for the group.

This time we will talk about "A NoSQL Data Store for Scalable Log Analysis" with Khalid Mahmood.

Each meeting starts at 15:00 (please have coffee/tea ready: it can be made in the local kitchen) and ends at 16:00. The meetings are informal, open and no registration is needed, but if you tell us in advance there are higher chances to get some cookies or cake.

A list of topics is maintained at http://www.it.uu.se/research/group/infolab/fika.

Gender Equality Group - Monthly Meeting
Wednesday 25 Oct
Location: ITC 1345, Time: 13:30-15:30

ON THE AGENDA:
APPLICATIONS

Disputation / Dissertation
27 October
Hanna Holmgren: Modelling of Moving Contact Lines in Two-Phase Flows
Location: ITC 2446, Time: 10:15

Hanna Holmgren will present and defend her PhD thesis. The opponent will be professor Stefan Turek, Institute of Applied Mathematics (LSIII), TU Dortmund, Germany. Professor Gunilla Kreiss has been the advisor.

DiVA includes abstract and full text.

InfoLab - Weekly Meeting
30 October
Geraldine Yactayo: Visualization of Multiplex Networks: Experimental Evidence
Location: ITC 19 120, Time: 15:15

Every Monday we meet in room 120, House 19 to discuss various topics of interest for the group.

This time we will talk about "Visualization of multiplex networks: experimental evidence" with Geraldine Yactayo.

Each meeting starts at 15:00 (please have coffee/tea ready: it can be made in the local kitchen) and ends at 16:00. The meetings are informal, open and no registration is needed, but if you tell us in advance there are higher chances to get some cookies or cake.

A list of topics is maintained at http://www.it.uu.se/research/group/infolab/fika.

InfoLab - Weekly Meeting
6 November
Axel Lindegren: Community Detection in Temporal Networks: State of the Art
Location: ITC 19 120, Time: 15:15

Every Monday we meet in room 120, House 19 to discuss various topics of interest for the group.

This time we will talk about "Community detection in temporal networks: state of the art" with Axel Lindegren.

Each meeting starts at 15:00 (please have coffee/tea ready: it can be made in the local kitchen) and ends at 16:00. The meetings are informal, open and no registration is needed, but if you tell us in advance there are higher chances to get some cookies or cake.

A list of topics is maintained at http://www.it.uu.se/research/group/infolab/fika.

Half-Time Ph.D. Seminar
8 November
Lei You: Modeling and Solving Some Resource Optimization Problems in 4G and 5G networks
Location: ITC 1311, Time: 10:15-11:15

Abstract: To provide high rate and capacity in communication systems, efficient utilisation of network resource is crucial. In this seminar, we explore optimisation in 4G and 5G heterogeneous network along two dimensions: resource allocation and network planning. Both orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) techniques will be discussed.

Disputation / Dissertation
10 November
Sajith Kecheril Sadanandan: Deep Neural Networks and Image Analysis for Quantitative Microscopy
Location: ITC 2446, Time: 10:15

Sajith Kecheril Sadanandan will present and defend his PhD thesis. The opponent will be Jeroen van der Laak, Associate Professor at the Diagnostic Image Analysis Group, Radboud University Medical Center, Nijmegen, The Netherlands.

Professor Carolina Wählby, Associate Professor Petter Ranefall, and Professor Ewert Bengtsson have served as Sajith's advisors.

DiVA includes abstract and full text.

InfoLab - Weekly Meeting
13 November
Amin Kaveh: Degree in Probabilistic Networks
Location: ITC 19 120, Time: 15:15

Every Monday we meet in room 120, House 19 to discuss various topics of interest for the group.

This time we will talk about "Degree in probabilistic networks" with Amin Kaveh.

Each meeting starts at 15:00 (please have coffee/tea ready: it can be made in the local kitchen) and ends at 16:00. The meetings are informal, open and no registration is needed, but if you tell us in advance there are higher chances to get some cookies or cake.

A list of topics is maintained at http://www.it.uu.se/research/group/infolab/fika.

InfoLab - Weekly Meeting
20 November
Davide Vega D'aurelio: Text Networks: Foundations and Structural Analysis
Location: ITC 19 120, Time: 15:15

Every Monday we meet in room 120, House 19 to discuss various topics of interest for the group.

This time we will talk about "Text networks: foundations and structural analysis" with Davide Vega D'aurelio.

Each meeting starts at 15:00 (please have coffee/tea ready: it can be made in the local kitchen) and ends at 16:00. The meetings are informal, open and no registration is needed, but if you tell us in advance there are higher chances to get some cookies or cake.

A list of topics is maintained at http://www.it.uu.se/research/group/infolab/fika.

Gender Equality Group - Monthly Meeting
29 November
Location: ITC 1345, Time: 13:30-14:30

ON THE AGENDA:
Supporting women in post docs, associate senior lecturers or senior lecturers positions (section 4.4 in the action plan)

See also the list of all upcoming seminars.

Internal seminars. Lecturers may be either internal or external.

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