Johan J. Lukkien

120 papers A 3B 16C 26Misc 9Journal 30Unranked 35

Year	Rank	Type	Title / Venue / Authors
2019	—	`conf`	Designing IoT Systems: Patterns and Managerial Conflicts. PerCom Workshops Leila Fatmasari Rahman, Tanir Ozcelebi, Johan J. Lukkien
2019	C	`conf`	End-to-End Multi-Modal Behavioral Context Recognition in a Real-Life Setting. FUSION Aaqib Saeed, Tanir Ozcelebi, Stojan Trajanovski, Johan J. Lukkien
2019	J	`jnl`	Runtime evaluation of cognitive systems for non-deterministic multiple output classification problems. Future Gener. Comput. Syst. Aravind Kota Gopalakrishna, Tanir Ozcelebi, Johan J. Lukkien, Antonio Liotta
2018	C	`conf`	An independent yet efficient analysis of bandwidth reservation for credit-based shaping. WFCS Jingyue Cao, Mohammad Ashjaei, Pieter J. L. Cuijpers, Reinder J. Bril, Johan J. Lukkien
2018	C	`conf`	Behavior-driven Development for Real-time Embedded Systems. ETFA Amir Soltani Nezhad, Johan J. Lukkien, Rudolf H. Mak
2018	J	`jnl`	Independent WCRT analysis for individual priority classes in Ethernet AVB. Real Time Syst. Jingyue Cao, Pieter J. L. Cuijpers, Reinder J. Bril, Johan J. Lukkien
2018	J	`jnl`	Semantic Interoperability Architecture for Smart Spaces. Int. J. Fuzzy Log. Intell. Syst. Sachin Bhardwaj, Tanir Ozcelebi, Johan J. Lukkien
2018	J	`jnl`	Smart Space Concepts, Properties and Architectures. IEEE Access Sachin Bhardwaj, Tanir Ozcelebi, Johan J. Lukkien, Keon Myung Lee
2017	—	`conf`	An architecture pattern for safety critical automated driving applications: Design and analysis. SysCon Yaping Luo, Arash Khabbaz Saberi, Tjerk Bijlsma, Johan J. Lukkien, Mark van den Brand
2017	—	`conf`	Evaluating machine learning algorithms for applications with humans in the loop. ICNSC Aravind Kota Gopalakrishna, Tanir Ozcelebi, Johan J. Lukkien, Antonio Liotta
2017	C	`conf`	Pattern-based feature extraction for fault detection in quality relevant process control. ETFA Serena Peruzzo, Mike Holenderski, Johan J. Lukkien
2017	J	`jnl`	Relevance in cyber-physical systems with humans in the loop. Concurr. Comput. Pract. Exp. Aravind Kota Gopalakrishna, Tanir Ozcelebi, Johan J. Lukkien, Antonio Liotta
2017	—	`conf`	Stakeholder Impact on the Software Architecture of Intelligent Transport Systems Implementations. ICSA Workshops Jeroen Redegeld, Pieter J. L. Cuijpers, Johan J. Lukkien
2016	—	`conf`	An Approach for Systematic In-the-Loop Simulations for Development and Test of a Complex Mechatronic Embedded System. SAFECOMP Workshops Amir Soltani Nezhad, Johan J. Lukkien, Rudolf H. Mak, Richard Verhoeven, Martijn M. H. P. van den Heuvel
2016	—	`conf`	Choosing Your IoT Programming Framework: Architectural Aspects. FiCloud Leila Fatmasari Rahman, Tanir Ozcelebi, Johan J. Lukkien
2016	C	`conf`	Context based service discovery in unmanaged networks using mDNS/DNS-SD. ICCE Milosh Stolikj, Pieter J. L. Cuijpers, Johan J. Lukkien, Nina Buchina
2016	B	`conf`	Dependability Analysis of Asynchronous Radio Duty Cycling Protocols. ICCCN Salih Serdar Guclu, Tanir Ozcelebi, Johan J. Lukkien
2016	—	`conf`	Distributed Fault Detection in Smart Spaces Based on Trust Management. ANT/SEIT Sila Ozen Guclu, Tanir Ozcelebi, Johan J. Lukkien
2016	B	`conf`	Improving Broadcast Performance of Radio Duty-Cycled Internet-of-Things Devices. GLOBECOM Salih Serdar Guclu, Tanir Ozcelebi, Johan J. Lukkien
2016	C	`conf`	Improving failure prediction accuracy in smart environments. ICCE Sila Ozen Guclu, Ehsan Ullah Warriach, Tanir Ozcelebi, Johan J. Lukkien
2016	Misc	`conf`	Independent yet Tight WCRT Analysis for Individual Priority Classes in Ethernet AVB. RTNS Jingyue Cao, Pieter J. L. Cuijpers, Reinder J. Bril, Johan J. Lukkien
2016	J	`jnl`	ProMARTES: Accurate network and computation delay prediction for component-based distributed systems. J. Syst. Softw. Konstantinos Triantafyllidis, Waqar Aslam, Egor Bondarev, Johan J. Lukkien, Peter H. N. de With
2016	C	`conf`	Tight worst-case response-time analysis for ethernet AVB using eligible intervals. WFCS Jingyue Cao, Pieter J. L. Cuijpers, Reinder J. Bril, Johan J. Lukkien
2016	B	`conf`	Trust-Based Neighbor Unreachability Detection for RPL. ICCCN Sila Ozen Guclu, Tanir Ozcelebi, Johan J. Lukkien
2015	B	`conf`	A Comparison of Predictive Algorithms for Failure Prevention in Smart Environment Applications. Intelligent Environments Ehsan Ullah Warriach, Tanir Ozcelebi, Johan J. Lukkien
2015	J	`jnl`	Adaptive Broadcast Suppression for Trickle-Based Protocols. CoRR Thomas M. M. Meyfroyt, Milosh Stolikj, Johan J. Lukkien
2015	C	`conf`	Adaptive broadcast suppression for Trickle-based protocols. WOWMOM Thomas M. M. Meyfroyt, Milosh Stolikj, Johan J. Lukkien
2015	A	`conf`	Analysis of ethernet-switch traffic shapers for in-vehicle networking applications. DATE Sivakumar Thangamuthu, Nicola Concer, Pieter J. L. Cuijpers, Johan J. Lukkien
2015	J	`jnl`	Budget allocations for hierarchical fixed-priority scheduling of sporadic tasks with deferred preemptions upon EDP resources. SIGBED Rev. Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien
2015	—	`conf`	From modes to patterns: Pattern-based resource management in time-critical applications. SIES Rudolf H. Mak, Ionut David, Johan J. Lukkien
2015	B	`conf`	Improving the Performance of Trickle-Based Data Dissemination in Low-Power Networks. EWSN Milosh Stolikj, Thomas M. M. Meyfroyt, Pieter J. L. Cuijpers, Johan J. Lukkien
2015	J	`jnl`	Improving the Performance of Trickle-Based Data Dissemination in Low-Power Networks. CoRR Milosh Stolikj, Thomas M. M. Meyfroyt, Pieter J. L. Cuijpers, Johan J. Lukkien
2015	J	`jnl`	Proactive Dependability Framework for Smart Environment Applications. CoRR Ehsan Ullah Warriach, Tanir Ozcelebi, Johan J. Lukkien
2015	C	`conf`	The case of Dynamic Street Lighting an exploration of long-term data collection. ETFA Johan J. Lukkien, Richard Verhoeven
2014	—	`conf`	A wearable monitoring system for nocturnal epileptic seizures. ISMICT Constantin Ungureanu, Vinh T. Bui, Wouter Roosmalen, Ronald M. Aarts, Johan B. A. M. Arends, Richard Verhoeven, Johan J. Lukkien
2014	—	`conf`	Fault-Prevention in Smart Environments for Dependable Applications. SASO Ehsan Ullah Warriach, Tanir Ozcelebi, Johan J. Lukkien
2014	—	`conf`	Intelligent street lighting clustering. WiMobCity@MobiHoc Richard Verhoeven, Natasa Jovanovic, Johan J. Lukkien
2014	C	`conf`	Light pole localization in a smart city. ETFA Mike Holenderski, Richard Verhoeven, Tanir Ozcelebi, Johan J. Lukkien
2014	J	`jnl`	Mode-based resource-usage prediction for runtime resource reservations of video components. IEEE Trans. Consumer Electron. Ionut David, Rudolf H. Mak, Martijn M. H. P. van den Heuvel, Johan J. Lukkien
2014	B	`conf`	Optimal and fast composition of resource-sharing components in hierarchical real-time systems. RTCSA Martijn M. H. P. van den Heuvel, Moris Behnam, Reinder J. Bril, Johan J. Lukkien, Thomas Nolte
2014	C	`conf`	Performance evaluation of analysis methods for arbitrating non-preemptive resource access in compositional real-time systems. ETFA Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien, Thomas Nolte
2014	C	`conf`	Proxy support for service discovery using mDNS/DNS-SD in low power networks. WoWMoM Milosh Stolikj, Richard Verhoeven, Pieter J. L. Cuijpers, Johan J. Lukkien
2014	J	`jnl`	Red-black trees with relative node keys. Inf. Process. Lett. Mike Holenderski, Reinder J. Bril, Johan J. Lukkien
2014	B	`conf`	Self-* Properties in Smart Environments: Requirements and Performance Metrics. Intelligent Environments (Workshops) Ehsan Ullah Warriach, Tanir Ozcelebi, Johan J. Lukkien
2014	Misc	`conf`	Statistical Inference for Intelligent Lighting: A Pilot Study. IDC Aravind Kota Gopalakrishna, Tanir Ozcelebi, Antonio Liotta, Johan J. Lukkien
2014	C	`conf`	Towards an interoperable framework for mixed real-time simulations of industrial embedded systems. ETFA Amir Soltani Nezhad, Luis F. B. Ferreira, Martijn M. H. P. van den Heuvel, Richard Verhoeven, Johan J. Lukkien, Rudolf H. Mak, Eric Korff de Gidts
2013	Misc	`conf`	Best-case response times and jitter analysis of real-time tasks with arbitrary deadlines. RTNS Reinder J. Bril, Johan J. Lukkien, Rudolf H. Mak
2013	—	`conf`	Efficient reprogramming of wireless sensor networks using incremental updates. PerCom Workshops Milosh Stolikj, Pieter J. L. Cuijpers, Johan J. Lukkien
2013	J	`jnl`	Grasp: Visualizing the behavior of hierarchical multiprocessor real-time systems. J. Syst. Archit. Mike Holenderski, Reinder J. Bril, Johan J. Lukkien
2013	Misc	`conf`	Improved feasibility of fixed-priority scheduling with deferred preemption using preemption thresholds for preemption points. RTNS Reinder J. Bril, Martijn M. H. P. van den Heuvel, Johan J. Lukkien
2013	C	`conf`	Patching a patch - Software updates using horizontal patching. ICCE Milosh Stolikj, Pieter J. L. Cuijpers, Johan J. Lukkien
2013	J	`jnl`	Patching a patch - software updates using horizontal patching. IEEE Trans. Consumer Electron. Milosh Stolikj, Pieter J. L. Cuijpers, Johan J. Lukkien
2013	J	`jnl`	Relevance As a Metric for Evaluating Machine Learning Algorithms CoRR Aravind Kota Gopalakrishna, Tanir Ozcelebi, Antonio Liotta, Johan J. Lukkien
2013	—	`conf`	Relevance Prevails: Missing Data Treatment in Intelligent Lighting. ICMMI Aravind Kota Gopalakrishna, Tanir Ozcelebi, Antonio Liotta, Johan J. Lukkien
2013	—	`conf`	Relevance as a Metric for Evaluating Machine Learning Algorithms. MLDM Aravind Kota Gopalakrishna, Tanir Ozcelebi, Antonio Liotta, Johan J. Lukkien
2013	C	`conf`	Resource-usage modes detection for run-time resource prediction of video components. ICCE Ionut David, Martijn M. H. P. van den Heuvel, Rudolf H. Mak, Johan J. Lukkien
2013	—	`conf`	Virtual scheduling for compositional real-time guarantees. SIES Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien
2012	—	`conf`	A Body Sensor Platform for concurrent applications. ICCE-Berlin Vinh T. Bui, Richard Verhoeven, Johan J. Lukkien
2012	C	`conf`	Delay constrained resource allocation for wireless home networks. ICCE Waqar Aslam, Johan J. Lukkien
2012	C	`conf`	Dependable partitioning for autonomous agents in adaptive lighting environments. ICCE Sunder A. B. Rao, Tanir Ozcelebi, Martijn M. H. P. van den Heuvel, Richard Verhoeven, Johan J. Lukkien
2012	—	`conf`	Energy-aware Reprogramming of Sensor Networks Using Incremental Update and Compression. ANT/MobiWIS Milosh Stolikj, Pieter J. L. Cuijpers, Johan J. Lukkien
2012	—	`conf`	Exploiting machine learning for intelligent room lighting applications. IEEE Conf. of Intelligent Systems Aravind Kota Gopalakrishna, Tanir Özçelebi, Antonio Liotta, Johan J. Lukkien
2012	B	`conf`	Generalized Fixed-Priority Scheduling with Limited Preemptions. ECRTS Reinder J. Bril, Martijn M. H. P. van den Heuvel, Ugur Keskin, Johan J. Lukkien
2012	C	`conf`	Increasing reliability and availability in smart spaces: A novel architecture for resource and service management. ICCE Sachin Bhardwaj, Tanir Ozcelebi, Ozgur Ozunlu, Johan J. Lukkien
2012	B	`conf`	Parallel-Task Scheduling on Multiple Resources. ECRTS Mike Holenderski, Reinder J. Bril, Johan J. Lukkien
2012	—	`conf`	RTOS Support for Mixed Time-triggered and Event-triggered Task Sets. CSE Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien, Damir Isovic, Gowri Sankar Ramachandran
2012	C	`conf`	Resource and service management architecture of a Low Capacity Network for smart spaces. ICCE Sachin Bhardwaj, Tanir Ozcelebi, Cagri Uysal, Johan J. Lukkien
2012	J	`jnl`	Streaming-aware channel utilization improvement for wireless home networks. IEEE Trans. Consumer Electron. Waqar Aslam, Johan J. Lukkien
2012	C	`conf`	Towards RTOS support for mixed time-triggered and event-triggered task sets. ETFA Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien, Damir Isovic, Gowri Sankar Ramachandran
2012	J	`jnl`	Transparent Synchronization Protocols for Compositional Real-Time Systems. IEEE Trans. Ind. Informatics Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien
2012	—	`conf`	Treatment of Missing Data in Intelligent Lighting Applications. UIC/ATC Aravind Kota Gopalakrishna, Tanir Özçelebi, Antonio Liotta, Johan J. Lukkien
2011	—	`conf`	An engineering approach to synchronization based on overrun for compositional real-time systems. SIES Ugur Keskin, Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien, Moris Behnam, Thomas Nolte
2011	J	`jnl`	Constant bandwidth supply for priority processing. IEEE Trans. Consumer Electron. Martijn M. H. P. van den Heuvel, Mike Holenderski, Reinder J. Bril, Johan J. Lukkien
2011	J	`jnl`	Context-aware resource management for secure end-to-end QoS provision in service oriented applications. J. Ambient Intell. Smart Environ. Shudong Chen, Johan J. Lukkien, P. H. F. M. Verhoeven
2011	—	`conf`	Dependable Resource Sharing for Compositional Real-Time Systems. RTCSA (1) Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien
2011	B	`conf`	Dynamically Reconfigurable Resource-Aware Component Framework: Architecture and Concepts. ECSA Bojan Orlic, Ionut David, Rudolf H. Mak, Johan J. Lukkien
2011	J	`jnl`	Exploring user-centered intelligent road lighting design: a road map and future research directions. IEEE Trans. Consumer Electron. Cagdas Atici, Tanir Ozcelebi, Johan J. Lukkien
2011	J	`jnl`	Reducing memory requirements in a multimedia streaming application. IEEE Trans. Consumer Electron. Mike Holenderski, Reinder J. Bril, Johan J. Lukkien
2011	—	`conf`	Toward a trust management model for a configurable body sensor platform. BODYNETS Vinh T. Bui, Johan J. Lukkien, Richard Verhoeven
2010	B	`conf`	Application level phase adjustment for maximizing the fairness in VANET. MASS Tseesuren Batsuuri, Reinder J. Bril, Johan J. Lukkien
2010	C	`conf`	Exact response-time analysis for fixed-priority preemption-threshold scheduling. ETFA Ugur Keskin, Reinder J. Bril, Johan J. Lukkien
2010	C	`conf`	Exploiting harmonic periods to improve linearly approximated response-time upper bounds. ETFA Chidiebere G. U. Okwudire, Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien
2010	C	`conf`	Memory management for multimedia Quality of Service in resource constrained embedded systems. ETFA Mike Holenderski, Chidiebere G. U. Okwudire, Reinder J. Bril, Johan J. Lukkien
2010	C	`conf`	Protocol-transparent resource sharing in hierarchically scheduled real-time systems. ETFA Martijn M. H. P. van den Heuvel, Reinder J. Bril, Johan J. Lukkien
2010	B	`conf`	Towards Resource-Aware Runtime Reconfigurable Component-Based Systems. SERVICES Ionut David, Bojan Orlic, Rudolf H. Mak, Johan J. Lukkien
2010	—	`conf`	Towards verification-based development of in-vehicle safety critical software: a case study. EDCC-CARS Martijn M. H. P. van den Heuvel, Reinder J. Bril, Peter van de Velde, Johan J. Lukkien
2009	C	`conf`	Multiplexing Real-time Timed Events. ETFA Mike Holenderski, Wim Cools, Reinder J. Bril, Johan J. Lukkien
2009	—	`conf`	Swift Mode Changes in Memory Constrained Real-Time Systems. CSE (2) Mike Holenderski, Reinder J. Bril, Johan J. Lukkien
2009	J	`jnl`	Worst-case response time analysis of real-time tasks under fixed-priority scheduling with deferred preemption. Real Time Syst. Reinder J. Bril, Johan J. Lukkien, Wim F. J. Verhaegh
2008	Misc	`conf`	An Investigation Into Soft-state Protocol Parameters. PDPTA Melissa Tjiong, Johan J. Lukkien
2008	B	`conf`	Obtaining resource controllability in service cooperation environments. MUM Shudong Chen, Johan J. Lukkien
2007	—	`conf`	A service-oriented virtual community overlay network for secure external service orchestration. MPAC Shudong Chen, Johan J. Lukkien
2007	J	`jnl`	Adaptive runtime fault management for service instances in component-based software applications. IET Softw. Rong Su, Michel R. V. Chaudron, Johan J. Lukkien
2007	—	`conf`	Architecture of a Bi-Directional Bluetooth-UPnP Proxy. CCNC Archi Delphinanto, Johan J. Lukkien, Antonius M. J. Koonen, Frank T. H. den Hartog, António Madureira, I. G. M. M. Niemegeers, Franklin Selgert
2007	—	`conf`	CASSANDRA Framework: A Service Oriented Distributed Multimedia Content Analysis Engine. WIAMIS Fons de Lange, Jan Nesvadba, Johan J. Lukkien
2007	J	`jnl`	Controller Area Network (CAN) schedulability analysis: Refuted, revisited and revised. Real Time Syst. Robert I. Davis, Alan Burns, Reinder J. Bril, Johan J. Lukkien
2007	J	`jnl`	Hierarchical resource allocation for robust in-home video streaming. J. Syst. Softw. Peter van der Stok, Dmitri Jarnikov, Sergei Kozlov, Michael van Hartskamp, Johan J. Lukkien
2007	J	`jnl`	Language-based access control approach for component-based software applications. IET Softw. Rong Su, Johan J. Lukkien, Michel R. V. Chaudron
2007	—	`conf`	QoS management in distributed service oriented systems. Parallel and Distributed Computing and Networks Andrei Korostelev, Johan J. Lukkien, Jan Nesvadba, Yuechen Qian
2007	B	`conf`	Worst-Case Response Time Analysis of Real-Time Tasks under Fixed-Priority Scheduling with Deferred Preemption Revisited. ECRTS Reinder J. Bril, Johan J. Lukkien, Wim F. J. Verhaegh
2006	B	`conf`	On a Theory of Media Processing Systems Behavior, with Applications. ECRTS M. A. Weffers-Albu, Johan J. Lukkien, Elisabet F. M. Steffens, P. D. V. van der Stok
2005	—	`ch.`	A Component Framework for Consumer Electronics Middleware. Component-Based Software Development for Embedded Systems Johan Muskens, Michel R. V. Chaudron, Johan J. Lukkien
2005	A	`conf`	Real-Time and Distributed AV Content Analysis System for Consumer Electronics Networks. ICME Jan Nesvadba, Pedro Fonseca, Alexander Sinitsyn, Fons de Lange, Martijn Thijssen, Patrick van Kaam, Hong Liu, Rien van Leeuwen, Johan J. Lukkien, Andrei Korostelev, Jan Ypma, Bart Kroon, Hasan Celik, Alan Hanjalic, Suphi Umut Naci, Jenny Benois-Pineau, Peter H. N. de With, Jungong Han
2004	—	`conf`	A Compositional Claim-based Component Certification Procedure. EUROMICRO Hailiang Mei, Johan J. Lukkien, Johan Muskens
2004	—	`conf`	Analysis and improvements of the eventing protocol for universal plug and play. Communications, Internet, and Information Technology Y. Mazuryk, Johan J. Lukkien
2004	—	`conf`	The FABRIC Project. EWSA Peter van der Stok, Jan Jelle Boomgaardt, Helmut Burklin, Gabriele Cecchetti, Jean-Dominique Decotignie, Hermann de Meer, Gerhard Fohler, Johan J. Lukkien, Gerardo Rubino
2003	A	`conf`	Methods for Parallel Simulations of Surface Reactions. IPDPS Silvia V. Nedea, Johan J. Lukkien, Peter A. J. Hilbers, A. P. J. Jansen
2002	C	`conf`	A Calculus for Mobile Network Systems. ICFEM Jinfeng Huang, Ad Verschueren, Henri Aalderink, Johan J. Lukkien
2002	—	`conf`	Implementation and Validation of UPnP for Embedded Systems in a Home Networking Environment. Communications, Internet, and Information Technology T. Tranmanh, Loe M. G. Feijs, Johan J. Lukkien
2002	Misc	`conf`	Service Discovery Mechanisms: Two Case Studies. PDPTA Johan J. Lukkien, T. Tranmanh, P. H. F. M. Verhoeven, Peter J. F. Peters
2001	Misc	`conf`	Ab-Initio Kinetics of Heterogeneous Catalysis: NO+N+O/Rh(111). International Conference on Computational Science (1) A. P. J. Jansen, C. G. M. Hermse, F. Frechard, Johan J. Lukkien
1996	Misc	`conf`	A parallel algorithm for stereo vision based on correlation. HiPC J. C. M. Van Beek, Johan J. Lukkien
1996	—	`conf`	Parallel Monte Carlo Simulation of Chemical Surface Reactions: A Case Study. HPCN Europe John Segers, Johan J. Lukkien, Peter A. J. Hilbers
1996	Misc	`conf`	Stereo Vision and 3D Reconstruction on a Distributed Memory System. PDPTA Nico H. L. Kuijpers, G. Paar, Johan J. Lukkien
1994	J	`jnl`	Operational Semantics and Generalized Weakest Preconditions. Sci. Comput. Program. Johan J. Lukkien
1992	B	`conf`	An Operational Semantics for the Guarded Command Language. MPC Johan J. Lukkien
1992	J	`jnl`	Weakest Preconditions for Progress. Formal Aspects Comput. Johan J. Lukkien, Jan L. A. van de Snepscheut
1991	—	`conf`	A Distributed Implementation of a Task Pool. Research Directions in High-Level Parallel Programming Languages H. Peter Hofstee, Johan J. Lukkien, Jan L. A. van de Snepscheut
1989	J	`jnl`	Deadlock-Free Message Routing in Multicomputer Networks. Distributed Comput. Peter A. J. Hilbers, Johan J. Lukkien
1989	J	`jnl`	Some experience in distributed programming using shortest path spanning trees. Future Gener. Comput. Syst. Johan J. Lukkien