Acknowledgment to Reviewers of Machines in 2021

Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Machines was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 16 days and the median time to publication was 38 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:

Abdelrahem, Mohamed	Łapka, Piotr
Abdullah, Oday Ibraheem	Laski, Pawel Andrzej
Abed, Eyad	Le, Thi-Thu-Huong
Abiev, Rufat	Lee, Byeong Ha
Actis Grande, Marco	Lee, Gee-Soo
Afonso, Frederico	Lee, Hyunseop
Ahmed, Hafiz	Lee, Hyunsoo
Ahuir-Torres, Juan Ignacio	Lee, Kang-Kuen
Alagoz, Baris Baykant	Lee, Posen
Alam, Md. Shafiul	Lee, Sanghoon
Alexakis, Haris	Lei, Gang
Ali, Md. Hazrat	Lewandowski, Mirosław
Aliyu, Aliyu	Li, Bing
Alkan, Bugra	Li, Chaojiang
AlZubaidi, Abbas K.	Li, Chong
Amineh, Reza K.	Li, Deyou
Anuchin, Alecksey	Li, Huaizhong
Araújo, Evando	Li, Jia
Araujo-Estrada, Sergio A.	Li, Jianguang
Arencón, David	Li, Li
Artal-Sevil, Jesús Sergio	Li, Zhaohua
Arteiro, Albertino	Lia, Leif
Ashique, Ratil H.	Liang, Goh Guo
Astolfi, Davide	Lillo, Paolo Di
Avis, Christophe	Lin, Chih-Hong
Azar, Ahmad Taher	Lin, Chun-Yeon
Aziz, Muhammad	Lin, Daw-Tung
Bacellar, Daniel	Lin, Huei-Yung
Badea, Gheorghe	Ling, Qiang
Balandin, Dmitry Vladimirovich	Liparoti, Sara
Barbarelli, Silvio	Lisjak, Dragutin
Barbon Junior, Sylvio	Litwin, Dariusz
Barni, Andrea	Liu, Ang
Barrera Figueroa, Salvador	Liu, Caishan
Barsi, Dario	Liu, Changzhao
Baršić, Gorana	Liu, Guijie
Bartoszewicz, Andrzej	Liu, Jianbin
Barukčić, Marinko	Liu, Jing-Sin
Becker, Marcelo	Liu, Qidi
Behboodi, Ahad	Liu, Tian-Hua
Behzad, Mehdi	Loiseau, Jean Jacques
Belhocine, Ali	Long, Philip
Beltran-Carbajal, Francisco	Lonkwic, Paweł
Bhounsule, Pranav A.	Lopac, Nikola
Bian, Yougang	López Jiménez, Petra Amparo
Bianchi, Domenico	López Martínez, Javier
Bieniek, Andrzej	Lopez-Santos, Oswaldo
Bílek, Ondřej	Lopot, František
Biluš, Ignacijo	Lorenzo, Miguel
Bin Ramli, Rizauddin	Lozanovic Sajic, Jasmina
Bindzár, Peter	Lukichev, Dmitry
Birou, Iulian M. T.	Luque, Pablo Rodríguez
Bizon, Nicu	Lussier, Benjamin
Blanco, Ignazio	Luwei, Kenisuomo C.
Blecha, Petr	Ma, Sang-Bum
Bocîi, Liviu Sevastian	Ma, Xinkai
Bogusz, Piotr	Maga, Dušan
Bone, Gary	Magdziak, Marek
Bonfè, Marcello	Makowski, Michał
Bordianu, Adelina	Maldonado-Cortes, Demófilo
Borovik, Sergey	Malekimoghadam, Reza
Bosioc, Ilie Alin	Mandriota, Riccardo
Bottin, Matteo	Mankova, Ildiko
Bou, Santiago Ferrandiz	Manta, Ioana
Brandusoiu, Ionut	Mao, Yao
Brauss, Daniel	Maranesi, Elvira
Bravo-Sanchez, Micael Gerardo	Marini, Martino
Brčić, David	Marinov, Marin
Breaz, Radu-Eugen	Mariotti, Alessandro
Brecher, Christian	Marotta, Nicola
Brumerčík, František	Marques, Filipe
Buciakowski, Mariusz	Marsano, Davide
Bugiotti, Francesca	Martinez Prata, Diego
Bujoreanu, Carmen	Martínez-Otzeta, José María
Bulgariu, Laura	Martins Da Silva, Maira
Butean, Alex	Maruda, Radosław W.
Cabeza-Lainez, Jose M.	Masato, Davide
Cafolla, Daniele	Masood, Nahid Al
Calvo, Roque	Masselli, Claudia
Candiotti, Jorge Luis	Matsumoto, Yohei
Cannarile, Francesco	Matušů, Radek
Capitani, Renzo	Maurin, Artur
Carbone, Giuseppe	McDaniel, Dwayne
Carneiro, J. Falcão	Meira Castro, Ana C.
Castillo, Oscar	Melentiev, Ruslan
Cavas-Martínez, Francisco	Melo, Maria
Čech, Martin	Mercorelli, Paolo
Čereška, Audrius	Meriggi, Paolo
Česnavičius, Ramūnas	Michler, Oliver
Chan, Joseph Chang Lun	Miguélez, M. Henar
Chang, Chung-Ping	Mihai, Cruceru
Chang, Pei-Zen	Miller, Piotr
Chang, Zhiyong	Min, Junwei
Charbonnier, Baptiste	Minussi, Carlos Roberto
Chasalevris, Athanasios	Mishra, Anand Kumar
Che, Xin	Misyurin, Sergey Yu.
Cheepu, Murali Mohan	Modica, Francesco
Chen, Dar-Zen	Mohammed, Beadaa Jasem
Chen, Guoda	Moreira, Erick Menezes
Chen, Hongtian	Morris, Isabel
Chen, Jiahong	Moses, Kenneth
Chen, Jia-Shiun	Moulianitis, Vassilis
Chen, Jim	Moulianitis, Vassilis C.
Chen, Syuan-Yi	Muhammadhaji, Ahmadjan
Chen, Xiaowang	Musiał, Janusz
Chen, Zhuyun	Muthugala, Viraj
Cheneler, David	Mykhailyshyn, Roman
Cheng, Jian	Nagit, Gheorghe
Cheung, Ronald C. M.	Navarro, Roberto
Chiang, Chen-Yu	Neduzha, Larysa
Cho, Hyung Hee	Nejman, Miroslaw
Chockalingam, Bharatiraja	Nemec, Mitja
Choi, Jin Hwan	Ni, Pinghe
Chudzikiewicz, Andrzej	Nicholas, Gary
Chumachenko, Dmytro	Nikolaidis, Spiros
Cirovic, Goran	Nikulchev, Evgeniy
Cisneros-Magaña, Rafael	Ning, Puqig
Ciupitu, Liviu	Noga, Stanisław
Čohodar Husić, Maida	Nourmohammadi, Amir
Cojocaru, Dorian	Novak, Martin
Constantinescu, Carmen	Noveanu, Simona
Constantinescu, Radu	Nugroho, Sebastian
Conti, Paolo	Obi, Shinnosuke
Corral Abad, Eduardo	Ochowiak, Marek
Corsini, Alessandro	Oh, Kwangseok
Cosovanu, Lucian-Mihai	Okolo, Patrick Nwosa
Costa Ramos, Daniel	Olczak, Piotr
Cousin, Christian A.	Olšiak, Róbert
Crenganis, Mihai	Olvera Trejo, Daniel
Crisan, Gloria Cerasela	Oncioiu, Ionica
Critello, Davide C.	Ordaz, Patricio
Cruz, Pedro	Orman, Lukasz
Cui, Han (Helen)	Orosz, Tamás
Cui, Jiashan	Osman, Shazali
Cyklis, Piotr	Ouamara, Daoud
D’Addona, Doriana Marilena	Pacella, Massimo
Daehn, Glenn	Pal, Snehashis
Dalla Vedova, Matteo Davide Lorenzo	Palmerini, Giovanni
D’Alvia, Livio	Palmieri, Marco
Damaševičius, Robertas	Panagiotou, Pericles
Danzi, Francesco	Panowicz, Robert
D’Arco, Mauro	Papacharalampopoulos, Alexios
De Falco, Domenico	Paredes, Manuel
De Novaes Pires Leite, Gustavo	Park, Junhong
Deaconu, Sorin Ioan	Park, Sangki
Deemyad, Taher	Pascal, Carlos
Deja, Mariusz	Pauk, Jolanta
Del Sol Illana, Irene	Pazderski, Dariusz
Del-Valle-Soto, Carolina	Peeters, Daniël
Desnica, Eleonora	Pellicano, Francesco
Di Blasio, Gabriele	Peng, Ming-Tsan
Di Nardo, Mauro	Pereira, Octavio
Diaz, Melvin	Perez-Cruz, Angel
Díaz-Rodríguez, Miguel	Pérez-García, José
Dieterlen, Alain	Pérez-González, Antonio
Díez-González, Javier	Perne, Matija
Dimitrov, Borislav	Pescaru, Dan
Dindorf, Ryszard	Pesch, Alexander H.
Djeziri, Mohand Arab	Petru, Livinti
Dobre, Alexandru	Pinto Ferreira, Luís Carlos
Dobrzycki, Arkadiusz	Pintore, Giovanni
Dolnik, Bystrik	Piska, Miroslav
Drabczyk, Anna	Piwowarski, Marian
Draganovska, Dagmar	Platero, Carlos
Drăgoi, Mircea Viorel	Plociennik, Christiane
Drewniak, Józef	Poh Kiat, Ng
Du, Jingtao	Polach, Pavel
Duarte, Denio	Polatidis, Nikolaos
Duh, Feng-Chyi	Poll, Gerhard W. G.
Dulebenets, Maxim	Poskovic, Emir
Dumitriu, Mădălina	Premachandra, Chinthaka
Dumitru, Popescu Florin	Prsic, Dragan
Dupláková, Darina	Pugi, Luca
Dutta, Saikat	Pujol Vazquez, Gisela
Duvigneau, Fabian	Puskar, Michal
Dybkowski, Mateusz	Qin, Hongde
Dyl, Tomasz	Qingqing, Li
Dyrcz, Czesław	Quispe, Enrique Ciro
Dzionk, Stefan	Rabe, Marcin
Egeland, Olav	Radac, Mircea-Bogdan
Ehret, Gerd	Radanliev, Petar
Ehrmann, Guido	Radenovic, Stojan
Ejsmont, Krzysztof	Radescu, Radu
Engin, Mustafa	Radulescu, Mircea
Fan, Rang-lin	Raffaeli, Roberto
Farahani, Behzad V.	Rahman, Muhommad Azizur
Farajpour, Ali	Rahmani Ahranjani, Ramin
Farooqi, Hafsa	Raj, Nawin
Fayed, Ahmad	Rajahonka, Mervi
Fedorov, Ruslan V.	Ramirez, Ramon
Fei, Cheng-Wei	Rangarajan, Shriram S.
Felez, Jesus	Rashid, Rizwan Rahman
Felhő, Csaba	Ravelet, Florent
Fernandez Oro, Jesus Manuel	Razik, Hubert
Fidan, Ismail	Razmi, Amir Reza
Filippov, Andrey	Rhi, Seok-Ho
Filo, Grzegorz	Riba Ruiz, Jordi-Roger
Floris, Andrea	Ribeiro, João
Foit, Krzysztof	Ribeiro, Matheus Henrique Dal Molin
Fonseca, Davide	Ribino, Patrizia
Fontanarosa, Donato	Ridolfi, Alessandro
Fortuna, Luigi	Ristić, Leposava
Fosalau, Cristian	Rituraj, Rituraj
Fragomeni, Gionata	Rivière-Lorphèvre, Edouard
Franulovic, Marina	Robert, Newcomb
Frigau, Luca	Rodrigues, Mário S.
Frosina, Emma	Rodríguez, Jaime
Fu, Chao	Rodríguez-Avi, José
Fu, Guoqiang	Rodríguez-Reséndiz, Juvenal
Fujiwara, Eric	Romano, Donato
Funieru, Bogdan	Romeo, Rocco Antonio
Fürst, Jiri	Romero, Fernando Castano
Gadola, Marco	Rosa, Luis Guerra
Gajic, Dragoljub	Roumeliotis, Ioannis
Gal, Ionel-Alexandru	Roveda, Loris
Galuppini, Giacomo	Rowe, Brian
Gandzha, Sergey	Rubino, Sandro
Gao, Xiangyu	Rucki, Miroslaw
Garabedian, Nikolay	Ruiz, Dante
Garcia Gonçalves, Luiz Marcos	Ruiz, Oscar
García Orden, Juan Carlos	Runacres, Mark C.
García-Fogeda, Pablo	Russo, Matteo
Gargiulo, Paolo	Russo, Riccardo
Gąska, Adam	Ruuska, Jari
Gasparetto, Alessandro	Ryu, Keun
Gawryluk, Jarosław	Safari, Mehdi
Geem, Zong Woo	Safeea, Mohammad
Georgescu, Andrei-Mugur	Sahin, Caner
Georgios, Tairidis	Sajewicz, Eugeniusz
Gevorkov, Levon	Saleem, Muhammad
Ghadimi, Noradin	Salguero, Jorge
Gheorghe, Grigoras	Salomon, Camila Paes
Gherman, Bogdan	Salzenstein, Patrice
Ghorbani, Morteza	Sánchez-Romero, Francisco-Javier
Ghosal, Sambuddha	Sani, Luca
Giberti, Hermes	San-Segundo, Ruben
Gierlak, Piotr	Santos, Rafael M.
Gierz, Łukasz	Sapa, Lucjan
Giorgetti, Alessandro	Sari, Rafael
Girovský, Peter	Sarosi, Jozsef
Gissen, Abraham	Sartorato, Murilo
Giurgiulescu, Liviu	Sasaki, Ken
Gligor, Adrian	Saternus, Zbigniew
Głowacz, Adam	Sattarpanah Karganroudi, Sasan
Gondi, Santosh	Saucedo-Dorantes, Juan Jose
Gonzalez Angeles, Alvaro	Savkovic, Borislav
González, Haizea	Scaccabarozzi, Diego
González, Hernán	Scheidl, Rudolf
Gonzalez-Parra, Gilberto	Schiffmann, Jürg Alexander
Gorbenko, Anna	Schiraldi, Massimiliano M.
Górecki, Jan	Schuster, Sebastian
Górnicki, Krzysztof	Sciarretta, Andrea
Goubej, Martin	Seo, Byung-Kuk
Goyal, Rinkaj	Shaaban Sayed Ahmed, Mahmoud
Graba, Marcin	Shadloo, Mostafa Safdari
Grabowski, Marcin	Shahid, Arsalan
Grgić, Ivan	Shahri, Abbas Abbaszadeh
Grigorev, Maxim	Shao, Ke
Gromov, Alexander Alexandrovich	Shen, Baotang
Grosch, Patrick	Shen, Yang
Guillen Bonilla, Héctor	Shi, Xiaojun
Gulo, Carlos Alex Sander J.	Shieh, Hsin-Jang
Guo, Longxiang	Shimada, Keita
Guo, Xianggui	Shishika, Daigo
Gyan, Philippe	Simoni, Roberto
Haber, Rodolfo	Singh, Rajani
Haberko, Jakub	Sinha, Jyoti
Habibi, Hamed	Sinka, Maris
Habrych, Marcin	Skoczeń, Andrzej
Haddad, Malik	Skurjat, Aleksander
Hagemann, Thomas	Sladic, Sasa
Haitjema, Han	Slaski, Grzegorz
Hajari, Nasim	Sławski, Sebastian
Hajžman, Michal	Smyk, Emil
Hann, Christopher	Solmaz, Selim
Hao, Guangbo	Song, Kechen
Harik, El Houssein Chouaib	Sotelo Monge, Marco Antonio
Hassan, Modar	Sozański, Krzysztof Piotr
Haupt, Michael	Sperlì, Giancarlo
Hermes, Giberti	Srpak, Dunja
Heydari, Azim	Stavropoulos, Panagiotis
Hirz, Mario	Stavroulakis, Georgios E.
Hlaváčová, Irena M.	Stojadinovic, Slavenko
Hloch, Sergej	Strozzi, Antonio
Hnatiuc, Mihaela	Strzelecki, Przemysław
Holub, Michal	Subtirelu, Gheorghe-Eugen
Honner, Milan	Sulitka, Matej
Horla, Dariusz	Sułowicz, Maciej
Horvath, Denis	Sun, Chi-Chia
Hoyos Velasco, Fredy	Svetlík, Jozef
Hożyń, Stanisław	Szabat, Krzysztof
Hu, Binjie	Szabo, Lorand
Huang, Chung-Neng	Tamellin, Iacopo
Huang, Ko-Wei	Tănasă, Constantin
Huang, Sudan	Tang, Lewei
Hung, Shao-Kang	Teimourian, Amir
Hunt, Andrew	Teso-Fz-Betoño, Daniel
Hur, Jang-Wook	Tiselj, Iztok
Hussmann, Heinrich	Toma, Milan
Hwang, Myun Joong	Tomaz, Italo
Hwangbo, Hyunwoo	Tortella, Andrea
Iannace, Gino	Tosanovic, Natasa
Iglesias, Alexander	Toth, Frantisek
Iida, Michihisa	Trematerra, Amelia
Ikeo, Shigeru	Trifale, Ninad
Iliescu, Mihaiela	Trimulyono, Andi
Ilkhani, Mohammadreza	Tristo, Gianluca
Islam, Md. Rabiul	Truong, Viet Anh
Ivanescu, Mircea	Tsai, Chia-Hung Dylan
Jafari, Mohammad	Tsoutsanis, Elias
Jafari, Soheil	Tucan, Paul
Jaganathan, Arun	Tudoroiu, Nicolae
Janez, Gotlih	Ulacia, Ibai
Janos, Rudolf	Ulbrich, Dariusz
Jaroslav, Vrchota	Ur Rehman, Atta
Jasińska, Elżbieta	Urizar, Monica
Jerman, Andrej	Vaiana, Nicolò
Jin, Sangrok	Valigi, Maria Cristina
Jlassi, Imed	Vasic, Darko
Jung, Jinwoo	Velas, Andrej
Jung, Joonha	Velázquez, Ramiro
Kagan, Eugene	Velikanov, Vladimir
Kamal, Md. Abdus Samad	Vereshchaka, Alexey A.
Kamamichi, Norihiro	Verma, Prateek
Kambiz, Tehrani	Véstias, Mário
Kampa, Adrian	Vieira Lopes, Nuno
Kampczyk, Arkadiusz	Vinko, Davor
Kaniappan Chinnathai, Malarvizhi	Virgala, Ivan
Kao, Yung-Chou	Visconti, Paolo
Kaplan, Kaplan	Visentin, Francesco
Karamov, Dmitriy	Vita, Alessio
Kari, Leif	Vizureanu, Petricǎ
Karl, Christian Wolfgang	Voglitsis, Dionisios
Karmiris-Obratański, Panagiotis	Volpe, Annalisa
Kartal, Fuat	Vrančić, Damir
Kascak, Slavomir	Vujović, Igor
Kaššay, Peter	Wang, Anyang
Kateris, Dimitrios	Wang, Baicun
Katunin, Andrzej	Wang, Hai
Kebisek, Michal	Wang, Hongbo
Kechagias, John	Wang, Hsiang-Chen
Kelemen, Michal	Wang, Leyu (Douglas)
Khakimyanov, Marat	Wang, Ming-Shyan
Khan, Dawar	Wang, Shuangyi
Khanesari, Mojtaba Ahmadieh	Weber, Felix
Khatir, Samir	Węglowski, Marek
Khazraee, Milad	Weng, Yiwei
Kilikevičius, Artūras	West, Shaun
Kim, Changwon	Wierzbicki, Sławomir
Kim, Chan-Jung	Wilk, Andrzej
Kim, Eui-Soo	Wilke, Daniel
Kim, Jae Hee	Wojewoda, Jerzy
Kim, Jingyun	Woodfield, Peter
Kim, Jong-Chan	Wrenger, Burkhard
Kim, Jong-Myon	Wu, Hao
Kim, Seok-Kyoon	Wyffels, Francis
Kim, Sung-Soo	Wysocki, Marian
Kirchner, Eckhard	Xu, Fei
Kirilov, Plamen	Xu, Lang
Kisilowski, Jerzy	Yang, Rui
Kiyoshi, Sawai	Yang, Xin
Klemenc, Jernej	Yasmin, Humaira
Klimaszewski, Krzysztof	Yeon, Jaeheum
Klionovska, Ksenia	Yih, Chih-Chen
Kluczyk, Marcin	Yildirim, Mehmet
Klyuev, Roman V.	Yin, Shen
Knypiński, Łukasz	Yoon, Keun-Young
Kobrle, Pavel	Yu, Nan
Kochmański, Paweł	Yu, Simon C.
Kodkin, Vladimir	Zaba, Krzysztof
Köllner, Anton	Zafar, Azhar
Koloor, Seyed Saeid Rahimian	Zagórski, Ireneusz
Kong, Lingbao	Zaki, Ahmad
Kong, Xiangxiong	Zambrano-Serrano, Ernesto
Konsulova-Bakalova, Mariya	Zampieri, Nicolò
Kopeika, Natan	Zeljkovic, Milan
Košnar, Karel	Zeng, Hulong
Kostal, Peter	Zerdali, Emrah
Kostrzewski, Mariusz	Zhang, Cheng
Kovács, György	Zhang, Jiazhong
Koyanagi, Ken’ichi	Zhang, Jize
Kozień, Marek	Zhang, Shaojian
Krause, Dieter	Zhao, Jingshan
Kremieniewski, Marcin	Zhauyt, Algazy
Krimpenis, Agathoklis A.	Zheng, Lu
Krzemianowski, Zbigniew	Zhou, Kai
Kudelski, Rafał	Zhou, Ling
Kurz, Marc	Zhu, Guoniu
Kyratsis, Panagiotis	Zlatar, Dario
Lajunen, Antti	Zyuzev, Anatoliy Mikhaylovich
Lamichhane, Tej	Zywica, Grzegorz