Toggle navigation
Publications
Profiles
Research Groups
Indexes
Help and information
Eesti keeles
Intranet
Publications
Profiles
Research Groups
Indexes
Help and information
Eesti keeles
Intranet
Databases
Publications
Searching
My bookmarks
0
power electronics (keyword)
All fields
Source search
Author search
Subject term search
Title search
starts with
containes
exact match
All fields
Source search
Author search
Subject term search
Title search
starts with
containes
exact match
—
All fields
Source search
Author search
Subject term search
Title search
starts with
containes
exact match
—
All fields
Source search
Author search
Subject term search
Title search
starts with
containes
exact match
—
All fields
Source search
Author search
Subject term search
Title search
starts with
containes
exact match
—
Add criteria
Advanced search
filter
Clear
×
types of item
book
..
journal article
..
newspaper article
..
book article
..
dissertation
..
Open Access
..
Scientific publications
..
year
year of publication
Loading..
author
Loading..
TalTech department
Loading..
subject term
Loading..
series
Loading..
name of the person
Loading..
keyword
Loading..
Clear
Number of records
31
Look more..
(4/435)
Export
export all inquiry results
(31)
Save TXT fail
Save PDF fail
print
Open for editing with marked entries
my bookmarks
display
Bibliographic view
Short view
sort
author ascending
author descending
year of publication ascending
year of publication descending
title ascending
title descending
1
book article
Analysis of cost function composition based on the horizon time prediction of an indirect MPC current control in single-phase grid-connected PV inverters
Pimentel, Sergio Pires
;
Husev, Oleksandr
;
Vinnikov, Dmitri
;
Stepenko, Serhii
2019 IEEE 60th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 7-9 October 2019 : conference proceedings
2019
/
6 p. : ill
https://doi.org/10.1109/RTUCON48111.2019.8982377
book article
2
book article EST
/
book article ENG
Code development of a DSP-FPGA based control platform for power electronics applications
Minambres-Marcos, Victor
;
Roasto, Indrek
;
Szczepankowski, P.
;
Romero-Cadaval, Enrique
;
Vinnikov, Dmitri
;
Barrero-Gonzalez, Fermin
2015 IEEE International Conference on Industrial Technology (ICIT 2015) : Seville, Spain, 17-19 March 2015
2015
/
p. 2890-2895 : ill
https://doi.org/10.1109/ICIT.2015.7125524
Conference proceedings at Scopus
Article at Scopus
Article at WOS
book article EST
/
book article ENG
3
journal article EST
/
journal article ENG
Comparative feasibility study of partial power converter for interfacing battery energy storage into power system of future circular collider
Chub, Andrii
;
Niinemägi, Joosep
;
Colmenero, Manuel
;
Aguglia, Davide
Proceedings of the Estonian Academy of Sciences
2024
/
p. 396-415
https://doi.org/10.3176/proc.2024.4.08
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
journal article EST
/
journal article ENG
4
book article EST
/
book article ENG
Comparative study of the phase-integrated converter as universal power converter
Husev, Oleksandr
;
Matiushkin, Oleksandr
;
Vinnikov, Dmitri
;
Vosoughi Kurdkandi, Naser
;
Kouro, Samir
Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)
2022
/
p. 58-63
https://doi.org/10.1109/APEC43599.2022.9773553
Conference Proceedings at Scopus
Article at Scopus
book article EST
/
book article ENG
5
book article
A comparison of a discrete-time PI and an indirect MPC current controllers for a single-phase grid-connected inverter operating with distorted grid and significant computation feedback delay
Pimentel, Sergio Pires
;
Husev, Oleksandr
;
Vinnikov, Dmitri
;
Stepenko, Serhii
;
Kütt, Lauri
;
Rodriguez, Jose
2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC)
2019
/
6 p.: ill
https://doi.org/10.1109/COBEP/SPEC44138.2019.9065396
book article
6
book article
Curricula scheduling with educational thesaurus
Raud, Zoja
;
Vodovozov, Valery
The 2011 World Congress on Computer Science and Information Technology WCSIT'11, 24-27 January 2011, Cairo, Egypt
2011
/
[7 p.] : ill
book article
7
book article
Development of students’ activity through on-lecture assessment in electrical engineering
Vodovozov, Valery
;
Raud, Zoja
;
Gevorkov, Levon
Proceedings : 2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE) : Grand Cevahir Hotel and Convention Center, Istambul, Turkey, 01-04 June, 2014
2014
/
p. 2213-2217 : ill
book article
8
book article
Discontinuous space vector modulation technique for motor supply
Vodovozov, Valery
;
Egorov, Mikhail
EUROCON 2011 : International Conference on Computer as a Tool : April 27-29, Lisbon, Portugal
2011
/
[4 p.] : ill
book article
9
book article
Distributed energy laboratory concept focused on power electronics units
Poliakov, Nikolai
;
Demidova, Galina
;
Zolov, Pavel
International Conference on Electromechanical and Power Systems (SIELMEN)
2021
/
p. 387-392
https://doi.org/10.1109/SIELMEN53755.2021.9600330
book article
10
journal article
Envisioning the future renewable and resilient energy grids – a power grid revolution enabled by renewables, energy storage, and energy electronics
Peng, Fang Zheng
;
Liu, Chen-Ching
;
Li, Yuan
;
Jain, Akshay Kumar
;
Vinnikov, Dmitri
IEEE journal of emerging and selected topics in industrial electronics
2024
/
p. 8-26
https://doi.org/10.1109/JESTIE.2023.3343291
journal article
11
journal article EST
/
journal article ENG
Feasibility study of model predictive control for grid-connected twisted buck-boost inverter
Matiushkin, Oleksandr
;
Husev, Oleksandr
;
Rodriguez, Jose
;
Young, Hector
;
Roasto, Indrek
IEEE transactions on industrial electronics
2022
/
p. 2488-2499
https://doi.org/10.1109/TIE.2021.3068663
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
journal article EST
/
journal article ENG
Related publications
1
Photovoltaic string converter with universal compatibility with AC and DC microgrids = Alalis- ja vahelduvvoolu mikrovõrkudega ühilduv universaalne muundur päikese-elektrijaamadele
12
journal article
Forward-based DC-DC converter with eliminated leakage inductance problem
Matiushkin, Oleksandr
;
Husev, Oleksandr
;
Afshari, Hossein
;
Romero-Cadaval, Enrique
;
Roncero-Clemente, Carlos
IEEE transactions on industrial electronics
2025
/
p. 1638-1648
https://doi.org/10.1109/TIE.2024.3429626
journal article
13
journal article EST
/
journal article ENG
Full-bridge fault-tolerant isolated DC-DC converters : overview of technologies and application challenges
Bakeer, Abualkasim Ahmed Ali
;
Chub, Andrii
;
Vinnikov, Dmitri
IEEE Power Electronics Magazine
2022
/
p. 45-55
https://doi.org/10.1109/MPEL.2022.3196565
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
journal article EST
/
journal article ENG
Related publications
1
Fault-tolerant galvanically isolated DC‑DC converters with zero redundancy = Null-liiasusega veatolerantsed galvaanilise isolatsiooniga alalispingemuundurid
14
journal article EST
/
journal article ENG
High‐voltage pulse transformer for IOT modulators
Jalakas, Tanel
;
Janson, Kuno
;
Mõlder, Heigo
;
Roasto, Indrek
IET electric power applications
2020
/
p. 2348-2354
https://doi.org/10.1049/iet-epa.2019.0877
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
journal article EST
/
journal article ENG
15
book article
Hybrid low-power Wind Generation and PV grid-connected system with HPC, PC and MPPT control
Rosa, Carlos
;
Vinnikov, Dmitri
;
Romero-Cadaval, Enrique
;
Pires, Vitor
;
Martins, Joao
Proceedings : 2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE) : Grand Cevahir Hotel and Convention Center, Istambul, Turkey, 01-04 June, 2014
2014
/
p. 2024-2029 : ill
book article
16
book article
An indirect model predictive current control (CCS-MPC) for grid-connected single-phase three-level NPC quasi-z-source PV inverter
Pires Pimentel, Sergio
;
Husev, Oleksandr
;
Vinnikov, Dmitri
;
Roncero-Clemente, Carlos
;
Stepenko, Serhii
59th Annual International Scientific Conference on Power and Electrical Engineering : November 12, 13, 2018, Riga Technical University (RTUCON) : conference proceedings
2018
/
6 p. : ill
https://doi.org/10.1109/RTUCON.2018.8659840
book article
17
journal article
Mission profile resolution impacts on the thermal stress and reliability of power devices in PV inverters
Sangwongwanich, Ariya
;
Zhou, D.
;
Liivik, Elizaveta
;
Blaabjerg, Frede
Microelectronics reliability
2018
/
p. 1003-1007
https://doi.org/10.1016/j.microrel.2018.06.094
journal article
18
book article
Numerical simulations of wideband SiC N-N heterostructure diode
Patankar, Udayan Sunil
;
Koel, Ants
;
Pardy, Tamas
LAEDC 2020 : Latin American Electron Devices Conference, San José, Costa Rica, February 25-28, 2020
2020
/
4 p
https://doi.org/10.1109/LAEDC49063.2020.9073489
book article
19
dissertation
Research and development of an active learning technology for university-level education in the field of electronics and power electronics = Aktiivõppetehnoloogia uurimine ja väljatöötamine kõrghariduse õppekavale elektroonika ja jõuelektroonika valdkonnas
Raud, Zoja
2012
https://www.ester.ee/record=b2781667*est
dissertation
20
book article EST
/
book article ENG
SEU study of wideband heterostructure diode for particle detection
Patankar, Udayan Sunil
;
Koel, Ants
2021 IEEE International Conference on Consumer Electronics (ICCE)
2021
/
4 p. : ill
https://doi.org/10.1109/ICCE50685.2021.9427613
Conference Proceedings at Scopus
Article at Scopus
Article at WOS
book article EST
/
book article ENG
21
book article
Simulation study of inverter-fed motor drives
Egorov, Mikhail
10th International Symposium "Topical Problems in the Field of Electrical and Power Engineering”. Doctoral School of Energy and Geotechnology II : Pärnu, Estonia, January 10-15, 2011
2011
/
p. 165-168 : ill
book article
22
book article
Single-phase power electronics transformer with active functions for smart grid
Minambres-Marcos, Victor
;
Roasto, Indrek
;
Romero-Cadaval, Enrique
;
Strzelecki, Ryszard
;
Barrero-Gonzalez, Fermin
2015 9th International Conference on Compatibility and Power Electronics (CPE) : proceedings : Faculty of Science and Technology (FCT), Caparica, Lisbon, Portugal, 24-26 June, 2015
2015
/
p. 528-533 : ill
http://dx.doi.org/10.1109/CPE.2015.7231131
book article
23
book article
Single-switch impedance-source galvanically isolated DC-DC converter with combined energy transfer
Chub, Andrii
;
Vinnikov, Dmitri
;
Babaei, Ebrahim
;
Liivik, Elizaveta
;
Korkh, Oleksandr
;
Kouro, Samir
59th Annual International Scientific Conference on Power and Electrical Engineering : November 12, 13, 2018, Riga Technical University (RTUCON) : conference proceedings
2018
/
6 p. : ill
https://doi.org/10.1109/RTUCON.2018.8659851
book article
24
journal article EST
/
journal article ENG
Snubberless boost full-bridge converters: analysis of soft switching performance and limitations
Blinov, Andrei
;
Kosenko, Roman
;
Chub, Andrii
;
Vinnikov, Dmitri
International journal of circuit theory and applications
2019
/
p. 1−25 : ill
https://doi.org/10.1002/cta.2626
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
journal article EST
/
journal article ENG
25
book article
Step-Up series-resonant DC-DC converter with switched mode rectifier operating at fixed switching frequency
Chub, Andrii
;
Bakeer, Abualkasim Ahmed Ali
;
Vinnikov, Dmitri
2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 28 Sept.-1 Oct. 2020, Dubrovnik, Croatia
2020
/
p. 597-601
https://doi.org/10.1109/PEDG48541.2020.9244312
book article
Number of records 31, displaying
1 - 25
previous
1
2
next
keyword
429
1.
power electronics applications in power systems and utilities
2.
capabilities of power electronics
3.
module level power electronics (MLPE)
4.
module-level power electronics (MLPE)
5.
power electronics
6.
power electronics (PE)
7.
power electronics converter
8.
power electronics converters
9.
power electronics solutions
10.
PV module level power electronics
11.
smart power electronics
12.
Aerospace electronics
13.
automotive electronics key standards
14.
consumer electronics
15.
digital electronics
16.
electronics
17.
electronics cooling
18.
electronics engineering education
19.
Electronics packaging
20.
embedded electronics
21.
front-end electronics
22.
front-end electronics for detector readout
23.
micro-, nano-, and bio-electronics
24.
radiation-hard electronics
25.
space electronics
26.
technology CAD (electronics)
27.
AC power converters
28.
AC/DC power converter
29.
ac/dc-dc power converters
30.
AC‐AC power convertors
31.
ac-dc power conversion
32.
AC-DC power converter
33.
AC-DC power converters
34.
active power
35.
active power decoupling
36.
adaptive power allocation
37.
aircraft electric power system
38.
alpha power variability
39.
auxiliary power supply
40.
balance of power
41.
balancing power
42.
bidirectional power flow
43.
bidirectional power flow control
44.
bidirectional power transfer
45.
bisection based optimal power allocation
46.
boost power converter
47.
buck-boost full power converter
48.
buck–boost power converter
49.
capacitive power transfer
50.
CHP (combined power and heat)
51.
combined heat and power
52.
combined heat and power economic dispatch (CHPED)
53.
combined heat and power plant
54.
common-ground power converter
55.
concentrated solar power
56.
condensing power plant
57.
connection power
58.
constant power load
59.
constant power source
60.
consumed power minimization
61.
consumer power system
62.
consumer-perceived power
63.
contribution to power quality deterioration
64.
conventional power plant
65.
cyber physical power system (CPPS)
66.
cyber power Europe
67.
DC power supply
68.
DC/DC power conversion
69.
DC/DC power converters
70.
DC-AC power conversion
71.
DC-AC power converters
72.
DC-AC power convertors
73.
DC-DC power conversion
74.
DC‐DC power conversion
75.
DC-DC power converter
76.
DC-DC power converters
77.
DC–DC power converters
78.
DC-DC power convertors
79.
DC‐DC power convertors
80.
Differential Power Analysis (DPA)
81.
differential power processing (DPP)
82.
dimensioning cooling power
83.
directional power spectral density
84.
Discrete power device
85.
distributed power
86.
distributed power generation
87.
distributed power systems
88.
distrubuted power generation
89.
double power-law
90.
dual-purpose dc-dc/ac power converter
91.
economic power dispatch
92.
Egyptian power system
93.
electric power distribution
94.
electric power generation
95.
electric power storage system
96.
electric power system control
97.
electric power system stability
98.
electric power systems
99.
electric power transmission
100.
electric power transmission networks
101.
electric power utilization
102.
electrical power quality
103.
electrical power systems
104.
emerging power converters
105.
faults in power system
106.
flexibility in power systems
107.
fluid power feeding system with a pneumo-hydraulic accumulator
108.
fluid power system
109.
fossil fuel power plants
110.
fractional power zero-pole
111.
fuel cell power systems
112.
full power converter
113.
full power Z -source converter
114.
functional power plants
115.
functional power-plants
116.
GaAs power devices
117.
galvanically isolated DC-DC power converter
118.
Geological Power Bank
119.
global maximum power point
120.
global power sharing
121.
grid-connected power supply
122.
grid-forming power converters
123.
heat and power plant
124.
heating power
125.
high percentage of wind power
126.
high power density
127.
high step-up power converter
128.
high voltage power converters
129.
hybrid power system
130.
hydraulic power
131.
hydroelectric power generation
132.
hydroelectric power station (HEPS)
133.
inductive power transfer
134.
inductive power transfer (IPT)
135.
inductive power transmission
136.
inductive wireless power transfer link
137.
industrial power systems
138.
instantaneous power balancing
139.
integration of solar power plants
140.
Interconnected power system
141.
isolated power conditioning unit (PCU)
142.
isolated power converters
143.
Kalman-filter based maximum power point tracking (KF-MPPT)
144.
leakage current and reactive power supporting
145.
limited power
146.
lithium batteries and power system modeling
147.
local power supply system
148.
low power
149.
low-power ASIC design
150.
low-power decoupling
151.
low-power designs
152.
low-power device
153.
market power
154.
market power mitigation
155.
maximum available power
156.
maximum power point
157.
maximum power point tracker
158.
Maximum power point trackers
159.
maximum power point tracking
160.
maximum power point tracking (MPPT)
161.
medium voltage power cables
162.
Mini-block power plant
163.
Modern power system
164.
multi-machine industrial power plant
165.
multi-machine power system
166.
narrowband power line communications
167.
non-active power
168.
non-coercive power
169.
normative power
170.
nuclear power
171.
off-grid hybrid power supply
172.
Off-shore wind power
173.
offshore wind power plants
174.
oil shale-fired power plants
175.
oil-shale power generation
176.
parallel active power filter
177.
partial power based on buck-boost resonance converter
178.
partial power based on isolated Z - Source converter(PPZSC)
179.
partial power conversion
180.
partial power converter
181.
partial power converter (PPC)
182.
partial power converters
183.
partial power converters (PPC)
184.
partial power processing
185.
Partial power processing (PPP)
186.
peak power limiting
187.
photovoltaic power plant
188.
photovoltaic power systems
189.
power
190.
power allocation
191.
power amplifier
192.
Power amplifiers
193.
power aware computing
194.
power balance
195.
power based control
196.
power bed fusion
197.
power cable
198.
Power cables
199.
power capacitors
200.
power chart
201.
power combiner
202.
power conditioner
203.
power conditioning
204.
power conditioning units (PCUs)
205.
power consensus
206.
power consumption
207.
power consumption of production
208.
power control
209.
power conversion
210.
power converter
211.
power converter interfaces
212.
power converters
213.
power converters design
214.
power converters for EV
215.
power decoupling
216.
Power Delay Product (PDP)
217.
power delivery network
218.
power demand
219.
power density
220.
power devices
221.
power diodes
222.
power dissipation
223.
power disspation
224.
power distribution
225.
power distribution control
226.
power distribution faults
227.
power distribution lines
228.
power distribution network
229.
power distribution system
230.
power electronic building block
231.
power electronic converter
232.
power electronic converters
233.
power electronic interfaces
234.
power electronic interfaces for renewable energy sources
235.
power electronic transformer
236.
power engineering
237.
power engineering computing
238.
power exchange
239.
power factor
240.
power factor correction
241.
power factor correction (PFC)
242.
power flow
243.
power flow equations
244.
power forecasting
245.
power frequency
246.
power generation
247.
power generation dispatch
248.
power generation economics
249.
power generation planning
250.
power grid
251.
power grid imbalance
252.
power grid project
253.
power grids
254.
power harmonic filters
255.
power imbalance
256.
Power industry
257.
power injection
258.
power inverter
259.
power inverters
260.
Power Iteration Clustering (PIC)
261.
power law
262.
Power leveling strategy
263.
power limitation
264.
power line communication
265.
power line construction
266.
power loss
267.
power loss minimization
268.
power loss model
269.
power losses
270.
power management
271.
power market model
272.
power markets
273.
power measurement
274.
Power Mismatch Analysis
275.
power module
276.
power MOSFET
277.
power of discrimination
278.
power optimization
279.
power optimizer
280.
Power oscillation damping controller (PODC)
281.
power outage
282.
Power Plant
283.
power plant cycling
284.
power plant pollution
285.
Power plants
286.
power quality
287.
Power quality (PQ)
288.
power quality benchmarking
289.
power quality case study
290.
Power Quality Disturbances (PQD)
291.
power quality disturbances (PQDs)
292.
power quality legislation
293.
power quality measurement
294.
power quality measurement equipment
295.
power quality measurements
296.
power quality monitoring
297.
power quality parameters
298.
power reduction
299.
power reliability
300.
power semiconductor device
301.
power semiconductor devices
302.
power semiconductor switches
303.
power series
304.
power sharing
305.
power signature
306.
power smoothing
307.
power sources
308.
power spectral density
309.
power spectrum
310.
Power storage
311.
power supplier
312.
power supplies
313.
power supplies to apparatus
314.
power supply
315.
power swings
316.
power system
317.
power system analysis computing
318.
power system control
319.
power system dynamics
320.
power system economics
321.
power system faults
322.
power system harmonics
323.
power system management
324.
power system measurements
325.
power system modeling
326.
power system modelling
327.
power system operation
328.
power system parameter estimation
329.
power system planning
330.
power system protection
331.
power system reliability
332.
power system resilience
333.
power system restoration
334.
power system security
335.
power system simulation
336.
power system simulations
337.
Power system stabilizer (PSS)
338.
power system stability
339.
power system transient stability
340.
power systems
341.
Power systems expansion
342.
power systems flexibility
343.
power sytems
344.
power to hydrogen technology
345.
power transfer distribution factor
346.
power transformers
347.
power transistors
348.
power transmission
349.
power transmission lines
350.
power variations
351.
power verification
352.
power-aware
353.
power-electronic converters
354.
power-factor correction
355.
power-flow equations
356.
power-hardware-in-the-loop
357.
power-laws
358.
power-sharing
359.
power-to-gas based storage system
360.
Power-to-heat
361.
power-to-X
362.
PQ (Power Quality)
363.
PQM (Power Quality Monitoring)
364.
pulse width modulated power converters
365.
pulsed power load (PPL)
366.
pulsewidth-modulated power converters
367.
PV power generation
368.
PV power output
369.
PV power plant
370.
reactive power
371.
reactive power compensation
372.
reactive power control
373.
reactive power injection
374.
reactive power management
375.
reactive power provision
376.
relative band power
377.
relative gamma power
378.
resonant power convertors
379.
reverse power flow
380.
reverse power transfer
381.
r-th power residue symbol
382.
series partial power converter (S-PPC)
383.
series partial power converter (S-PPC) based on the push-pull
384.
shade-tolerant maximum power point tracking (MPPT)
385.
shale oil and power cogeneration
386.
shunt active power filter
387.
smart power grids
388.
Soft power
389.
solar power
390.
solar power forecasting
391.
solar power generation
392.
solar power plant integration
393.
space-based solar power
394.
static power converters
395.
surplus power factor
396.
sustainable power engineering
397.
switch mode power supply
398.
switched mode power supplies
399.
switched-mode power supplies
400.
switchedmode power supply
401.
switched-mode power supply
402.
symbolic power
403.
thermal power plant
404.
thermal power plants
405.
Thermal Power Station
406.
theta band power
407.
three-phase power factor correction (PFC) converter
408.
time-delay renewable power systems
409.
topological power plant
410.
topology/power control
411.
Unified power flow controller (UPFC)
412.
uninterruptible power supply (UPS)
413.
wave power
414.
welding power supply
415.
wind power
416.
wind power forecasting
417.
wind power generation
418.
wind power generators
419.
wind power plants
420.
wind power production
421.
Wind-photovoltaic-thermal-bundled power
422.
wireless power transfer
423.
virtual power plant
424.
virtual power plant (VPP)
425.
virtual power plants
426.
virtual power plant's (VPPs)
427.
working power of luminaires
428.
voting power
429.
15min power balance
subject term
3
1.
Baltic Electronics Conference
2.
18th Biennial Baltic Electronics Conference (BEC) 2022
3.
Enefit Power
TalTech department
2
1.
Thomas Johann Seebeck Department of Electronics
2.
Department of Electrical Power Engineering and Mechatronics
author
1
1.
Power, Ian M.
×
match
starts with
ends with
containes
sort
Relevance
ascending
descending
year of publication
author
TalTech department
subject term
series
name of the person
keyword
Otsing
Valikud
0
year of publication
AND
OR
NOT
author
AND
OR
NOT
TalTech department
AND
OR
NOT
subject term
AND
OR
NOT
series
AND
OR
NOT
name of the person
AND
OR
NOT
keyword
AND
OR
NOT