The publishing and editorial teams would like to thank the following, for their invaluable service as 2021 reviewers for this journal. We are very grateful for the contributions made. With their help, the journal has been able to publish such high-quality articles:

• A, Arivarasi
• A, John Rajan
• Abbassi Sourki, Foroud
• Abd Elghany, Khalid 
• Abd Rahim, Shayfull Zamree Bin
• Abdeen, Dana
• Abdelall, Esraa
• Abdelrhman, Yasser
• Abdullah, Abdul
• Abdullah, Johari Yap
• Abdullah, Zulkeflee
• Abouzaid, Khaoula
• Acevedo, Ruben
• Adenan, Mohd Shahriman
• Adhikary, N
• Adibi, Hamed
• Adluru, Hari
• Agam, Mohd Arif
• Agarwal, Kuldeep
• Agrawal, Rohit
• Agrawal, Sanat
• Ahmad Fozi, Muhammad Aiman
• Ahn, Sung-Hoon
• Ahsan, Amm Nazmul
• Ahsan, Md. Rumman Ul
• Akande, Stephen
• Akula, Siva Bhaskar
• Al Mortadi, Noor
• Al-Ahmari, Abdurahman
• Al-Chaar, Ghassan
• Albrecht Vechietti, Fernanda
• Alfaify, Abdullah
• Algunaid, Khalil
• Ali, Md. Hazrat
• Alifui-Segbaya, Frank
• Alix, Sébastien
• Alkahari, Mohd Rizal
• Alkahari, Mohd Rizal
• Allen, Michael
• Allison, Jared
• Altan, Mirigul
• Alvarado, Raul
• Alves, Jorge
• Ameen, Wadea
• Anandan, Sudharshan
• Anasane, Sandip
• Arafat, M. Tarik
• Araujo, Luis 
• Arcaute, Karina
• Ardi, Dennise
• Arduini, Fabiana
• Arjunan, Arun
• Armillotta, Antonio
• Armstrong, Jason
• Arora, Vinkel
• Arrizubieta, Jon Iñaki
• Asadi-Eydivand, Mitra
• Asadollahiyazdi, Elnaz
• Aslani, Kyriaki-Evangelia  
• Assis, Paulo
• Atia, Mostafa
• Ayappan, Praveen
• Ayatollahi, Majid R.
• Aydin, Levent
• Azari, Abbas
• Babkin, Aleksandr
• Babu, Sudarsanam
• Bagchi, Amit
• Bahrami, Bahador
• Bahubalendruni, M V A Raju
• Bai, Qian
• Bai, Shizhu
• Bai, Yuchao
• Bai, Yun
• Baila, Diana Irinel
• Balc, Nicolae
• Bamiduro, Oluwakayode
• Bandyopadhyay, Amit
• Banga, Harish
• Baragan, German
• Barreiros, Fatima
• Beheshtizadeh, Nima
• Belokar, Dr. Rajendra M
• Bernhardt, Michelle
• Bertana, Valentina
• Berto, Filippo
• Bertsch, Arnaud
• Bezek, Lindsey
• Bhagchandani, Ranjeet
• Bhattacharya, Sudip
• Bian, Huiguang
• Bibb, Richard
• Bieliński, Marek
• Blaya Haro, Fernando
• Bochnia, Jerzy
• Boğa, Cem
• Boivie, Klas
• Bonada, Jordi
• Bonnaud, Etienne
• Bonyár, Attila
• Boparai, Kamaljit
• Boschetto, Alberto
• Bottini, Luana
• Boyle, Jordan
• Brabazon, Dermot
• Bracarense, Alexandre
• Brajlih, Tomaz
• Brandt, Milan
• Brauner, Christian
• Brooks, Hadley
• Bruns, Miguel
• Bui, Huy-Tien
• Calderon, Ariel
• Čalnerytė, Dalia
• Camacho López, Ana Maria
• Caminero, Miguel
• Campana, Giampaolo
• Campbell, Robert
• Cao, Hongzhong
• Carvalho, Maria
• Casalino, Giuseppe
• Case, Michael
• Cazón, Aitor
• Cd, Naiju
• Celik, H. Kursat
• Chantarapanich, Nattapon
• Chao, Qi
• Charlon, Sebastian
• Chaves , Filipe
• Chawla, Jitendra
• Chekurov, Sergei
• Chen, Bo
• Chen, Changpeng
• Chen, Niechen
• Chen, Peng
• Chen, Qianyong
• Chen, Xinrong
• Chen, Xizhang
• Chen, Xueye
• Chen, Yanyu
• Chen, Yolnan
• Chen, Yong
• Chen, Zeyu
• Chen, Zhen
• Cheneler, David
• Cheng, Yanling
• Chimate, Chetan
• Chiou, Richard
• Chohan, Jasgurpreet Singh
• Choi, Jae-Won
• Choi, Younseok
• Christiyan, Jaya
• Coasey, Keith
• Cooper, Frank
• Cormier, Denis
• Cortes, Pedro
• Costa, Carlos
• Cotabarren, Ivana
• Crawford, Richard
• Cuan-Urquizo, Enrique
• Cunico, Marlon Wesley Machado
• Cunningham, C.R. 
• D´Amato, Roberto
• Da Silva, Jorge Vicente Lopes
• Dahake, Sandeep
• Dave, Harshit
• Davidson, Karl
• De Senzi Zancul, Eduardo
• Demir, Ali Gökhan
• Dev, Saty
• Ding, Songlin 
• Diosdado De La Peña, José Angel
• Diplas, Spyros
• Dışpınar, Derya
• Dong, Ju
• Dongari, Sarathchandra
• Donnelly, Kenneth
• Downing, David
• Du Plessis, Anton
• Du, Yixian
• Ebel, Thomas 
• Eggbeer, Dominic
• Ehrmann, Andrea
• Elahinia, Mohammad
• Elkaseer, Ahmed
• Ertugrul, Onur
• Eveleigh, Morgan
• Fahad, Muhammad
• Famakinwa, Tosin
• Fang, Lichen
• Farabi, Ehsan
• Farid, Muhammad Imran
• Feng, Jiawei
• Ferrandiz, Santiago
• Fidan, Ismail
• Finsterwalder, Florian
• Frank, Matthew
• G, Arumaikkannu
• Gaba, Sunil
• Gadre, Dhananjay
• Garcia Granada, Andres Amador
• García-Romeu, María Luisa
• Garg, Harish
• Gatto, Andrea
• Ge, Jiangbo
• Geng, Haibin
• Germani, Michele
• Ghasemi, Amirhossein
• Ghazali, Ifwat
• Ginoux, Geoffrey
• Gloria, Antonio
• Gohari, Soheil
• Gong, Haijun
• Gonzalez-Gutierrez, Joamin
• Gorguluarslan, Recep
• Górski, Filip
• Grasso, Marzio
• Graziosi, Serena
• Grierson, Dean
• Guan, Jieren
• Guarato, Alexandre
• Guo, Jianjun
• Gupta, Munish
• Gür, Yılmaz
• Gurrala, Pavan Kumar
• Hackney, Philip
• Hai-Ou, Zhang
• Han, Changjun
• Han, Duanduan
• Han, Xiaoxiao
• Hardy, John
• Hasanov, Seymur
• Hassan, Alaa
• Hattali, Mohamed
• Havenga, Sarel
• He, Dingyong
• Heiden, Bernhard
• Heng, Pang
• Holmström, Jan
• Hooshmand, Mohammad Javad
• Hoque, Md
• Hu, Yongxiang
• Huang,  Yongjiang
• Huang, Xiaodiao
• Hussein, Rafid
• Idram, Irwansyah
• Isaza, César
• Ivanova, Olga
• Jackman, John
• Jafari, Davoud
• Jariwala, Amit
• Jasti, Dr Vamsi Krishna
• Jemghili, Rajae
• Ji, Vincent
• Jiang, Cho-Pei
• Jiang, Jingchao
• Jiang, Kaiyi
• Jindal, Prashant
• Jing, Hemin
• Johnson, Andrew
• Joosten, Mathew
• Kabir, S M Fijul
• Kai, Dalton Alexandre
• Kanada, Yaususi
• Karunakaran, K.P.
• Kaushik , Yashpal
• Kececi, Emin
• Kechagias, John
• Khare, Navneet
• Khorasani, Mahyar
• Khoshnevis, Behrokh
• Kim, Duck Bong
• Kim, Il Yong
• King, Bethany
• Kirschman, Chuck
• Klahn, Christoph
• Koc, Bahattin
• Koc, Muammer
• Kohar, Robert
• Kong, Xiangxue
• Konovalov, Sergey
• Koptyug, Andrey
• Korkees, Feras
• Kotliński, Jarosław
• Kozhuthala Veetil, Jithin
• Kozior, Tomasz
• Krishnan, Manickavasagam
• Kucuk, Serdar
• Kumar, Dr. Rajender 
• Kumar, Ranvijay
• Kumar, Sanjay
• Kwok, Tsz Ho
• Kyratsis, Panagiotis
• Lalegani Dezaki, Mohammadreza
• Lambert, Chris
• Lamikiz, Aitzol
• Leary, Martin
• Lee, Shyh-Yuan
• Leicht,  Heinrich
• Li, Nanya
• Li, Runsheng
• Li, Wei
• Li, Wencao
• Li, Ye
• Li, Zhaoqing
• Liang, Liye
• Lifton, Victor
• Lin, Feng
• Lin, Sanbao
• Lin, Wenwiong
• Liu, Jie
• Liu, Tingting
• Liu, Wei
• Liu, Yaxiong
• Liu, Yunfeng
• Lopez Taborda, Luis Lisandro
• Lopez-Botello, Omar Eduardo
• Lopez, Juan
• Lovo, João
• Lozanovski, Bill
• Lu, Yanjin
• Lu, Zhongliang
• Luan, Yuhao
• Luo, Dan
• Lyu, Yueling
• M Adinarayanappa, Somashekara 
• M S, Anoop
• M, Sugavaneswaran
• Ma, Guangyi
• Maconachie, Tobias
• Magalini, Emanuele
• Maidin, Shajahan
• Majewski, Candice
• Malyala, Santosh Kumar
• Manurung, Yupiter Hp
• Mao, Huachao
• Mapley, Martin
• Martorelli, Massimo
• Marwat, Mohsin Ali
• Mavoori, Naveen
• Mazzoli, Alida
• Medellín Castillo, Hugo
• Meisel, Nicholas
• Mele, Mattia
• Mills, David
• Modi, Yashwant
• Mohd Ariffin, Mohd Khairol Anuar
• Molyneux, Anthony
• Moon, Seung Ki
• Moradi , Mahmoud 
• Moramarco, Vincenzo
• Moreno, Daniel
• Moris, Virgínia
• Motzki, Paul
• Mouloodi, Saeed 
• Movrin, Dejan
• Mu, Mulan
• Munguia, Javier
• Myant, Connor
• N, Thangadurai
• Nader, Javad
• Naffakh-Moosavy, Homam
• Naiel, Mohamed
• Narayan, Roger
• Narra, Sneha
• Naskar, Susmita
• Negi, Sushant
• Nejadi, Shami
• Nelson, Jared
• Nezhadfar, Pooriya
• Nguyen, Trieu Khoa
• Ni, Aleksey
• Niazi, Zahra
• Nikam, Sagar
• Niu, Fangyong
• Nordin, Axel
• Novak, James
• Ozer, Gokhan
• Özer, Gökhan
• Özerinç, Sezer
• P. Jirandehi, Arash
• Pahwa, Deepak
• Palmer, Bruce
• Pandelidi, Chrysoula
• Panesar, Ajit Singh
• Patterson, Albert
• Pei, Eujin
• Peng, Fei
• Peng, Tao
• Peng, Yu-Xiang
• Petousis, Markos
• Phillips, Tim
• Pinkerton, Andrew
• Policarpo, Hugo
• Pollice, Luciano
• Prabhakar, Pavana
• Pradel, Patrick
• Prakash, Chander
• Prasittisopin, Lapyote
• Qian, Ma
• Qian, Yue 
• Ramos-Grez, Jorge
• Ranganathan, Rajesh
• Razav, Javad 
• Razvan, Pacurar
• Reis, Ruham
• Rennie, Allan
• Reyes, Guillermo
• Roberts, Jenny
• Rochman, Arif
• Rosa, Francesco
• Rosen, David
• Rubinsky, Boris
• Ruiz-Huerta, Leopoldo
• Ruiz-Rubio, Leire
• S, Babu
• S, Sathish
• S, Vinodh
• Saadlaoui, Yassine
• Salmi, Mika
• Santana, Leonardo
• Sarıkaya, Murat
• Sarma, Shrutidhara
• Sastrahbudhe, Himanshu
• Seepersad, Carolyn
• Sehhat, M. Hossein
• Serfontein, Jean-Pierre
• Shao, Wei
• Sharma, Varun
• Shi, Yu
• Shi, Yusheng
• Siddiqui, Sanna
• Sidhu, Sarabjeet
• Silbernagel, Cassidy
• Sindersberger, Dirk
• Sing, Swee Leong
• Singh, Amit
• Singh, Gurminder
• Singh, Rupinder
• Singh, Sunpreet
• Snyder, Jessica
• Soares, Bruno
• Song, Guohua
• Song, Xuan
• Soriano Heras, Enrique
• Spaggiari, Andrea 
• Srouji , Samer
• Starr, Thomas
• Sun, Zhonggang
• Tan, Caiwang
• Tang, Qian
• Tang, Tian
• Tanvir, Ali Newaz Mohammad
• Taylor, Joe
• Taylor, Robert
• Ter Haar, Gerrit
• Tezel, Tugce
• Tian, Yingtao
• Tino, Rance
• Tiwari, Sunil
• Tiwary, Vivek
• Torrens, George
• Tran, Hong-Chuong
• Ulmeanu, Mihaela Elena
• V, Satheeshkumar
• Vanaei, Saeedeh
• Vastola, Guglielmo
• Vaughan, Ted
• Verma, Girish Chandra
• Vilas-Vilela, José
• Wang, Xiaobo
• Wankhede, Vishal Ashok
• Waqar, Saad
• Watson, Marcus
• Wu, Bintao
• Wu, Jinzhe
• Wu, Wenzheng
• Wu, Zefeng 
• Xia, Huanxiong
• Xiao, Zhongxu
• Xie, Baocheng
• Xiong, Yi
• Yadollahi, Aref
• Yan, Ming
• Yang, Kun
• Yang, Li
• Yang, Li
• Yeh, Zhenghao
• Yeoh, Cheow Keat
• Yeong, Wai Yee
• Yin, Jie
• Yılmaz, Mustafa 
• Yousefi Kanani, Armin
• Yu Cheng, Wang
• Yu, Tianbiao
• Yuan, Mengqi
• Yuan, Youlu
• Yuchao, Bai
• Yuichiro, Koizumi
• Zareiyan, Babak
• Zarybnicka, Lucie
• Zhang, Congyang
• Zhang, Jinliang
• Zhang, Kai
• Zhang, Peirong
• Zhang, Qiaoxin
• Zhodi, Nima
• Zhong, Xiangqiang
• Zhou, Kun
• Zhou, Wenchao
• Zivic, Fatima
• Zohdi, Nima
• 刘, 静
• 鲁, 金忠