default search action

combined dblp search
author search
venue search
publication search

ask others

Yu-Jia Chen

> Home > Persons

Person information

Refine list

refinements active!

zoomed in on ?? of ?? records

view refined list in

export refined list as

showing all ?? records

2020 – today

see FAQ

What is the meaning of the colors in the publication lists?

2024
[j19]
- view
  authority control:
- export record
  dblp key:
  - journals/iotj/FuKCQ24
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/iotj/FuKCQ24
Chien-Wei Fu, Meng-Lin Ku, Yu-Jia Chen, Tony Q. S. Quek:
UAV Trajectory, User Association, and Power Control for Multi-UAV-Enabled Energy-Harvesting Communications: Offline Design and Online Reinforcement Learning. IEEE Internet Things J. 11(6): 9781-9800 (2024)
[c30]
- view
  authority control:
- export record
  dblp key:
  - conf/isqed/ZhangLZC24
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/isqed/ZhangLZC24
Sai Qian Zhang, Jieyu Lin, Qi Zhang, Yu-Jia Chen:
Learning Client Selection Strategy for Federated Learning across Heterogeneous Mobile Devices. ISQED 2024: 1-7
2023
[c29]
- view
  authority control:
- export record
  dblp key:
  - conf/icce-tw/TsouCC23
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icce-tw/TsouCC23
Ying-Chi Tsou, Rui-Hsing Chou, Yu-Jia Chen:
A High-security Internet of Drones Design by Integrating Physical-layer Key Generation and Blockchain. ICCE-Taiwan 2023: 351-352
[c28]
- view
  authority control:
- export record
  dblp key:
  - conf/icce-tw/HuangC23a
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icce-tw/HuangC23a
Hai-Yan Huang, Yu-Jia Chen:
Fusion of Received Signal Strength and Channel State Information for Wireless Human Sensing. ICCE-Taiwan 2023: 617-618
2022
[j18]
- view
  authority control:
- export record
  dblp key:
  - journals/icl/ChenCK22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/icl/ChenCK22
Yu-Jia Chen, Wei Chen, Meng-Lin Ku:
Trajectory Design and Link Selection in UAV-Assisted Hybrid Satellite-Terrestrial Network. IEEE Commun. Lett. 26(7): 1643-1647 (2022)
[j17]
- view
  authority control:
- export record
  dblp key:
  - journals/iotj/ChenH22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/iotj/ChenH22
Yu-Jia Chen, Da-Yu Huang:
Joint Trajectory Design and BS Association for Cellular-Connected UAV: An Imitation-Augmented Deep Reinforcement Learning Approach. IEEE Internet Things J. 9(4): 2843-2858 (2022)
[j16]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - journals/tches/AbdulrahmanCCHK22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tches/AbdulrahmanCCHK22
Amin Abdulrahman, Jiun-Peng Chen, Yu-Jia Chen, Vincent Hwang, Matthias J. Kannwischer, Bo-Yin Yang:
Multi-moduli NTTs for Saber on Cortex-M3 and Cortex-M4. IACR Trans. Cryptogr. Hardw. Embed. Syst. 2022(1): 127-151 (2022)
[j15]
- view
  authority control:
- export record
  dblp key:
  - journals/tnse/ChenCP22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tnse/ChenCP22
Yu-Jia Chen, Xiao-Chun Chen, Miao Pan:
Defense Against Machine Learning Based Attacks in Multi-UAV Networks: A Network Coding Based Approach. IEEE Trans. Netw. Sci. Eng. 9(4): 2562-2578 (2022)
[j14]
- view
  authority control:
- export record
  dblp key:
  - journals/vtm/WangGNCLA22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/vtm/WangGNCLA22
Li-Chun Wang, Haris Gacanin, Dusit Niyato, Yu-Jia Chen, Chun-Hung Liu, Alagan Anpalagan:
Artificial Intelligence for Autonomous Vehicular Communication Networks [From the Guest Editors]. IEEE Veh. Technol. Mag. 17(2): 83-84 (2022)
[c27]
- view
  authority control:
- export record
  dblp key:
  - conf/icc/ChenCC22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icc/ChenCC22
Wei Chen, Deng-Kai Chang, Yu-Jia Chen:
Trajectory Control in Self-sustainable UAV-aided mmWave Networks: A Constrained Multi-agent Reinforcement Learning Approach. ICC Workshops 2022: 1017-1022
[c26]
- view
  authority control:
- export record
  dblp key:
  - conf/icce-tw/HuangC22
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icce-tw/HuangC22
Da-Yu Huang, Yu-Jia Chen:
Deep Learning for Base Station Association in Cellular-connected Unmanned Aerial Vehicle Systems. ICCE-TW 2022: 31-32
[i5]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - journals/corr/abs-2207-10371
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/abs-2207-10371
Chien-Wei Fu, Meng-Lin Ku, Yu-Jia Chen, Tony Q. S. Quek:
UAV Trajectory, User Association and Power Control for Multi-UAV Enabled Energy Harvesting Communications: Offline Design and Online Reinforcement Learning. CoRR abs/2207.10371 (2022)
2021
[j13]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - journals/access/LeeNWCS21
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/access/LeeNWCS21
Yi-Shan Lee, Naseem, Ping-Li Wu, Yu-Jia Chen, Jin-Wei Shi:
Neat Temporal Performance of InGaAs/InAlAs Single Photon Avalanche Diode With Stepwise Electric Field in Multiplication Layers. IEEE Access 9: 32979-32985 (2021)
[j12]
- view
  authority control:
- export record
  dblp key:
  - journals/tvt/ChenLC21
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tvt/ChenLC21
Yu-Jia Chen, Kai-Min Liao, Yung-Fang Chen:
End-to-End Delay Analysis in Aerial-Terrestrial Heterogeneous Networks. IEEE Trans. Veh. Technol. 70(2): 1793-1806 (2021)
[j11]
- view
  authority control:
- export record
  dblp key:
  - journals/tvt/ChenLKTC21
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tvt/ChenLKTC21
Yu-Jia Chen, Kai-Min Liao, Meng-Lin Ku, Fung Po Tso, Guan-Yi Chen:
Multi-Agent Reinforcement Learning Based 3D Trajectory Design in Aerial-Terrestrial Wireless Caching Networks. IEEE Trans. Veh. Technol. 70(8): 8201-8215 (2021)
[i4]
- view
  - electronic edition @ iacr.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/iacr/AbdulrahmanCCHK21
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/iacr/AbdulrahmanCCHK21
Amin Abdulrahman, Jiun-Peng Chen, Yu-Jia Chen, Vincent Hwang, Matthias J. Kannwischer, Bo-Yin Yang:
Multi-moduli NTTs for Saber on Cortex-M3 and Cortex-M4. IACR Cryptol. ePrint Arch. 2021: 995 (2021)
2020
[j10]
- view
  - electronic edition via DOI (open access)
  - details & citations
  authority control:
- export record
  dblp key:
  - journals/access/ChenH20
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/access/ChenH20
Yu-Jia Chen, Da-Yu Huang:
Trajectory Optimization for Cellular-Enabled UAV With Connectivity Outage Constraint. IEEE Access 8: 29205-29218 (2020)
[j9]
- view
  authority control:
- export record
  dblp key:
  - journals/tnse/ChenWW20
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tnse/ChenWW20
Yu-Jia Chen, Li-Chun Wang, Shu Wang:
Stochastic Blockchain for IoT Data Integrity. IEEE Trans. Netw. Sci. Eng. 7(1): 373-384 (2020)
[j8]
- view
  authority control:
- export record
  dblp key:
  - journals/tvt/ChenCZ20
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tvt/ChenCZ20
Yu-Jia Chen, Deng-Kai Chang, Cheng Zhang:
Autonomous Tracking Using a Swarm of UAVs: A Constrained Multi-Agent Reinforcement Learning Approach. IEEE Trans. Veh. Technol. 69(11): 13702-13717 (2020)
[c25]
- view
  authority control:
- export record
  dblp key:
  - conf/vtc/ChenCC20
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/vtc/ChenCC20
Wei Chen, Deng-Kai Chang, Yu-Jia Chen:
Combating the Impact of Jittering in UAV-based Sensing Systems Using Deep Denoising Network. VTC Fall 2020: 1-3
[c24]
- view
  authority control:
- export record
  dblp key:
  - conf/wcnc/LiaoCCC20
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/wcnc/LiaoCCC20
Kai-Min Liao, Guan-Yi Chen, Yu-Jia Chen, Yung-Fang Chen:
End-to-End Delay Analysis in mmWave UAV-Assisted Wireless Caching Networks. WCNC Workshops 2020: 1-6

2010 – 2019

see FAQ

What is the meaning of the colors in the publication lists?

2019
[j7]
- view
  authority control:
- export record
  dblp key:
  - journals/iotj/ChenW19a
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/iotj/ChenW19a
Yu-Jia Chen, Li-Chun Wang:
Privacy Protection for Internet of Drones: A Network Coding Approach. IEEE Internet Things J. 6(2): 1719-1730 (2019)
[j6]
- view
  authority control:
- export record
  dblp key:
  - journals/tnsm/AbdullazizWC19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tnsm/AbdullazizWC19
Osamah Ibrahiem Abdullaziz, Li-Chun Wang, Yu-Jia Chen:
HiAuth: Hidden Authentication for Protecting Software Defined Networks. IEEE Trans. Netw. Serv. Manag. 16(2): 618-631 (2019)
[j5]
- view
  authority control:
- export record
  dblp key:
  - journals/tpds/ChenW19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tpds/ChenW19
Yu-Jia Chen, Li-Chun Wang:
An Overflow Problem in Network Coding for Secure Cloud Storage. IEEE Trans. Parallel Distributed Syst. 30(4): 789-799 (2019)
[c23]
- view
  authority control:
- export record
  dblp key:
  - conf/apnoms/LiaoCC19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/apnoms/LiaoCC19
Kai-Min Liao, Guan-Yi Chen, Yu-Jia Chen:
Artificial Intelligence based Edge Caching in Vehicular Mobile Networks: Architecture, Opportunities, and Research Issues. APNOMS 2019: 1-6
[c22]
- view
  authority control:
- export record
  dblp key:
  - conf/globecom/ChenLKT19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/globecom/ChenLKT19
Yu-Jia Chen, Kai-Min Liao, Meng-Lin Ku, Fung Po Tso:
Mobility-Aware Probabilistic Caching in UAV-Assisted Wireless D2D Networks. GLOBECOM 2019: 1-6
[c21]
- view
  authority control:
- export record
  dblp key:
  - conf/iscc/NunnsCCLTC19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/iscc/NunnsCCLTC19
Gareth J. Nunns, Yu-Jia Chen, Deng-Kai Chang, Kai-Min Liao, Fung Po Tso, Lin Cui:
Autonomous Flying WiFi Access Point. ISCC 2019: 278-283
[c20]
- view
  authority control:
- export record
  dblp key:
  - conf/vtc/ChenC19
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/vtc/ChenC19
Xiao-Chun Chen, Yu-Jia Chen:
A Machine Learning Based Attack in UAV Communication Networks. VTC Fall 2019: 1-2
2018
[j4]
- view
  authority control:
- export record
  dblp key:
  - journals/iotj/ChenWCHC18
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/iotj/ChenWCHC18
Yu-Jia Chen, Li-Chun Wang, Meng-Chieh Chen, Pin-Man Huang, Pei-Jung Chung:
SDN-Enabled Traffic-Aware Load Balancing for M2M Networks. IEEE Internet Things J. 5(3): 1797-1806 (2018)
[j3]
- view
  authority control:
- export record
  dblp key:
  - journals/sj/ChenWWH18
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/sj/ChenWWH18
Yu-Jia Chen, Li-Chun Wang, Kuochen Wang, Wan-Ling Ho:
Topology-Aware Network Coding for Wireless Multicast. IEEE Syst. J. 12(4): 3683-3692 (2018)
[c19]
- view
  authority control:
- export record
  dblp key:
  - conf/wcnc/ChenCW18
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/wcnc/ChenCW18
Yu-Jia Chen, Wei-Yuan Cheng, Li-Chun Wang:
Learning-assisted beam search for indoor mmWave networks. WCNC Workshops 2018: 320-325
2017
[j2]
- view
  authority control:
- export record
  dblp key:
  - journals/tnsm/ChenWLL17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tnsm/ChenWLL17
Yu-Jia Chen, Li-Chun Wang, Feng-Yi Lin, Bao-Shuh Paul Lin:
Deterministic Quality of Service Guarantee for Dynamic Service Chaining in Software Defined Networking. IEEE Trans. Netw. Serv. Manag. 14(4): 991-1002 (2017)
[c18]
- view
  authority control:
- export record
  dblp key:
  - conf/globecom/ChenHW17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/globecom/ChenHW17
Yu-Jia Chen, Tong Hsu, Li-Chun Wang:
Improving Handover Performance in 5G mm-Wave HetNets. GLOBECOM 2017: 1-6
[c17]
- view
  authority control:
- export record
  dblp key:
  - conf/pimrc/ChenCW17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/pimrc/ChenCW17
Yu-Jia Chen, Li-Yu Cheng, Li-Chun Wang:
Prioritized resource reservation for reducing random access delay in 5G URLLC. PIMRC 2017: 1-5
[c16]
- view
  authority control:
- export record
  dblp key:
  - conf/pimrc/ChenWW17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/pimrc/ChenWW17
Yu-Jia Chen, Zi-Qi Wang, Li-Chun Wang:
Impact of aggregation factor on delay performance in group-based machine type communications. PIMRC 2017: 1-6
[c15]
- view
  authority control:
- export record
  dblp key:
  - conf/vtc/LinCW17
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/vtc/LinCW17
Chun-Rong Lin, Yu-Jia Chen, Li-Chun Wang:
Handoff Delay Analysis in SDN-Enabled Mobile Networks: A Network Calculus Approach. VTC Fall 2017: 1-5
[i3]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/ChenW17a
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/ChenW17a
Yu-Jia Chen, Li-Chun Wang:
Privacy Protection for Mobile Cloud Data: A Network Coding Approach. CoRR abs/1701.07075 (2017)
[i2]
- view
  - electronic edition @ arxiv.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/corr/ChenW17b
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/corr/ChenW17b
Yu-Jia Chen, Li-Chun Wang:
An Overflow Problem in Network Coding for Secure Cloud Storage. CoRR abs/1702.05346 (2017)
2016
[j1]
- view
  authority control:
- export record
  dblp key:
  - journals/tpds/ChenWL16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/tpds/ChenWL16
Yu-Jia Chen, Li-Chun Wang, Chen-Hung Liao:
Eavesdropping Prevention for Network Coding Encrypted Cloud Storage Systems. IEEE Trans. Parallel Distributed Syst. 27(8): 2261-2273 (2016)
[c14]
- view
  authority control:
- export record
  dblp key:
  - conf/cans/PengHCCCY16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/cans/PengHCCCY16
Bo-Yuan Peng, Yuan-Che Hsu, Yu-Jia Chen, Di-Chia Chueh, Chen-Mou Cheng, Bo-Yin Yang:
Multi-core FPGA Implementation of ECC with Homogeneous Co-Z Coordinate Representation. CANS 2016: 637-647
[c13]
- view
  authority control:
- export record
  dblp key:
  - conf/globecom/AbdullazizCW16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/globecom/AbdullazizCW16
Osamah Ibrahiem Abdullaziz, Yu-Jia Chen, Li-Chun Wang:
Lightweight Authentication Mechanism for Software Defined Network Using Information Hiding. GLOBECOM 2016: 1-6
[c12]
- view
  authority control:
- export record
  dblp key:
  - conf/icc/ChenSW16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icc/ChenSW16
Yu-Jia Chen, Yi-Hsin Shen, Li-Chun Wang:
Achieving energy saving with QoS guarantee for WLAN using SDN. ICC 2016: 1-7
[i1]
- view
  - electronic edition @ iacr.org (open access)
  - details & citations
- export record
  dblp key:
  - journals/iacr/PengHCCCY16
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/journals/iacr/PengHCCCY16
Bo-Yuan Peng, Yuan-Che Hsu, Yu-Jia Chen, Di-Chia Chueh, Chen-Mou Cheng, Bo-Yin Yang:
Multi-core FPGA Implementation of ECC with Homogeneous Co-Z Coordinate Representation. IACR Cryptol. ePrint Arch. 2016: 909 (2016)
2015
[c11]
- view
  authority control:
- export record
  dblp key:
  - conf/ipccc/HueCW15
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/ipccc/HueCW15
Calvin Hue, Yu-Jia Chen, Li-Chun Wang:
Traffic-aware networking for video streaming service using SDN. IPCCC 2015: 1-5
2014
[c10]
- view
  authority control:
- export record
  dblp key:
  - conf/cloudcom/ChenSW14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/cloudcom/ChenSW14
Yu-Jia Chen, Yi-Hsin Shen, Li-Chun Wang:
Traffic-Aware Load Balancing for M2M Networks Using SDN. CloudCom 2014: 668-671
[c9]
- view
  authority control:
- export record
  dblp key:
  - conf/cloudcom/ChenHWW14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/cloudcom/ChenHWW14
Yu-Jia Chen, Wan-Ling Ho, Li-Chun Wang, Kuo-Chen Wang:
A Cloud-Assisted Network Coded Packet Retransmission Approach for Wireless Multicasting. CloudCom 2014: 676-679
[c8]
- view
  - electronic edition @ escholarship.org (open access)
  - details & citations
- export record
  dblp key:
  - conf/cogsci/ChenC14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/cogsci/ChenC14
Yu-Jia Chen, James E. Corter:
Learning or Framing?: Effects of Outcome Feedback on Repeated Decisions from Description. CogSci 2014
[c7]
- view
  authority control:
- export record
  dblp key:
  - conf/wowmom/ChenLWL14
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/wowmom/ChenLWL14
Yu-Jia Chen, Feng-Yi Lin, Li-Chun Wang, Bao-Shuh Paul Lin:
A dynamic security traversal mechanism for providing deterministic delay guarantee in SDN. WoWMoM 2014: 1-6
2013
[c6]
- view
  authority control:
- export record
  dblp key:
  - conf/globecom/ChenLW13
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/globecom/ChenLW13
Yu-Jia Chen, Chen-Hung Liao, Li-Chun Wang:
An eavesdropping prevention problem when repairing network coded data from remote distributed storage. GLOBECOM 2013: 2711-2716
[c5]
- view
  authority control:
- export record
  dblp key:
  - conf/pimrc/ChenLW13
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/pimrc/ChenLW13
Yu-Jia Chen, Chia-Yu Lin, Li-Chun Wang:
A personal emergency communication service for smartphones using FM transmitters. PIMRC 2013: 3450-3455
[c4]
- view
  authority control:
- export record
  dblp key:
  - conf/trustcom/ChenLW13
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/trustcom/ChenLW13
Yu-Jia Chen, Chia-Yu Lin, Li-Chun Wang:
A Privacy-Preserved Joint Group Time Scheduling Mechanism for Mobile Social Applications. TrustCom/ISPA/IUCC 2013: 150-155
[c3]
- view
  authority control:
- export record
  dblp key:
  - conf/wcnc/ChenLW13
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/wcnc/ChenLW13
Yu-Jia Chen, Chia-Yu Lin, Li-Chun Wang:
Sensors-assisted rescue service architecture in mobile cloud computing. WCNC 2013: 4457-4462
2012
[c2]
- view
  authority control:
- export record
  dblp key:
  - conf/vtc/LinCWT12
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/vtc/LinCWT12
Chia-Yu Lin, Yu-Jia Chen, Li-Chun Wang, Yu-Chee Tseng:
A Proximity Sensor Based No-Touch Mechanism for Mobile Applications on Smart Phones. VTC Fall 2012: 1-5
2011
[c1]
- view
  authority control:
- export record
  dblp key:
  - conf/icppw/ChenW11
- ask others
- share record
  persistent URL:
  - https://dblp.org/rec/conf/icppw/ChenW11
Yu-Jia Chen, Li-Chun Wang:
A Security Framework of Group Location-Based Mobile Applications in Cloud Computing. ICPP Workshops 2011: 184-190

Coauthor Index

see FAQ

manage site settings

To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.