Toggle navigation
Publikatsioonid
Profiilid
Uurimisrühmad
Registrid
Abi ja info
Switch to English
Intranet
Publikatsioonid
Profiilid
Uurimisrühmad
Registrid
Abi ja info
English
Intranet
Andmebaasid
Publikatsioonid
Liitotsing
Valitud kirjed
0
energy security (võtmesõna)
Kõikidelt väljadelt
Allika otsing
Autori otsing
Märksõna otsing
Pealkirja otsing
allikas
autor
DOI
ilmumisaasta
ilmumiskoht
juhendaja
kategooria
kirjastus/väljaandja
klassifikaator
konverentsi toimumispaik
kvartiil
leidumus
märksõna
pealkiri
seeria-sari
tema kohta
TTÜ märksõna
TTÜ struktuuriüksus
url
võtmesõna
Kõikidelt väljadelt
autor
ekspert
intervjueerija
juhendaja
kaaspanustaja
kollektiivautor
kommenteerija
koostaja
toimetaja
tõlkija
pealkiri
pealkirja tõlge
seeria variantpealkiri
variantpealkiri
ajakirja erinumber
allikas
ajamärksõna
asutuse kohta
kohamärksõna
märksõna
vormimärksõna
seeria variantpealkiri
seeria-sari
leidumus
Open Access
kategooria (alam)
kategooria (üld)
algab
sisaldab
täpne vaste
Kõikidelt väljadelt
Allika otsing
Autori otsing
Märksõna otsing
Pealkirja otsing
allikas
autor
DOI
ilmumisaasta
ilmumiskoht
juhendaja
kategooria
kirjastus/väljaandja
klassifikaator
konverentsi toimumispaik
kvartiil
leidumus
märksõna
pealkiri
seeria-sari
tema kohta
TTÜ märksõna
TTÜ struktuuriüksus
url
võtmesõna
Kõikidelt väljadelt
autor
ekspert
intervjueerija
juhendaja
kaaspanustaja
kollektiivautor
kommenteerija
koostaja
toimetaja
tõlkija
pealkiri
pealkirja tõlge
seeria variantpealkiri
variantpealkiri
ajakirja erinumber
allikas
ajamärksõna
asutuse kohta
kohamärksõna
märksõna
vormimärksõna
seeria variantpealkiri
seeria-sari
leidumus
Open Access
kategooria (alam)
kategooria (üld)
algab
sisaldab
täpne vaste
Kõikidelt väljadelt
Allika otsing
Autori otsing
Märksõna otsing
Pealkirja otsing
allikas
autor
DOI
ilmumisaasta
ilmumiskoht
juhendaja
kategooria
kirjastus/väljaandja
klassifikaator
konverentsi toimumispaik
kvartiil
leidumus
märksõna
pealkiri
seeria-sari
tema kohta
TTÜ märksõna
TTÜ struktuuriüksus
url
võtmesõna
Kõikidelt väljadelt
autor
ekspert
intervjueerija
juhendaja
kaaspanustaja
kollektiivautor
kommenteerija
koostaja
toimetaja
tõlkija
pealkiri
pealkirja tõlge
seeria variantpealkiri
variantpealkiri
ajakirja erinumber
allikas
ajamärksõna
asutuse kohta
kohamärksõna
märksõna
vormimärksõna
seeria variantpealkiri
seeria-sari
leidumus
Open Access
kategooria (alam)
kategooria (üld)
algab
sisaldab
täpne vaste
Kõikidelt väljadelt
Allika otsing
Autori otsing
Märksõna otsing
Pealkirja otsing
allikas
autor
DOI
ilmumisaasta
ilmumiskoht
juhendaja
kategooria
kirjastus/väljaandja
klassifikaator
konverentsi toimumispaik
kvartiil
leidumus
märksõna
pealkiri
seeria-sari
tema kohta
TTÜ märksõna
TTÜ struktuuriüksus
url
võtmesõna
Kõikidelt väljadelt
autor
ekspert
intervjueerija
juhendaja
kaaspanustaja
kollektiivautor
kommenteerija
koostaja
toimetaja
tõlkija
pealkiri
pealkirja tõlge
seeria variantpealkiri
variantpealkiri
ajakirja erinumber
allikas
ajamärksõna
asutuse kohta
kohamärksõna
märksõna
vormimärksõna
seeria variantpealkiri
seeria-sari
leidumus
Open Access
kategooria (alam)
kategooria (üld)
algab
sisaldab
täpne vaste
—
Kõikidelt väljadelt
Allika otsing
Autori otsing
Märksõna otsing
Pealkirja otsing
allikas
autor
DOI
ilmumisaasta
ilmumiskoht
juhendaja
kategooria
kirjastus/väljaandja
klassifikaator
konverentsi toimumispaik
kvartiil
leidumus
märksõna
pealkiri
seeria-sari
tema kohta
TTÜ märksõna
TTÜ struktuuriüksus
url
võtmesõna
Kõikidelt väljadelt
autor
ekspert
intervjueerija
juhendaja
kaaspanustaja
kollektiivautor
kommenteerija
koostaja
toimetaja
tõlkija
pealkiri
pealkirja tõlge
seeria variantpealkiri
variantpealkiri
ajakirja erinumber
allikas
ajamärksõna
asutuse kohta
kohamärksõna
märksõna
vormimärksõna
seeria variantpealkiri
seeria-sari
leidumus
Open Access
kategooria (alam)
kategooria (üld)
algab
sisaldab
täpne vaste
—
Lisa tingimus
Lihtotsing
filter
Tühista
×
teaviku laadid
raamat
..
artikkel ajakirjas
..
artikkel ajalehes
..
artikkel kogumikus
..
dissertatsioon
..
Open Access
..
Teaduspublikatsioon
..
aasta
ilmumisaasta
Toon andmeid..
autor
Toon andmeid..
TTÜ struktuuriüksus
Toon andmeid..
märksõna
Toon andmeid..
seeria-sari
Toon andmeid..
tema kohta
Toon andmeid..
võtmesõna
Toon andmeid..
Tühista
Kirjeid leitud
5
Vaata veel..
(2/574)
Ekspordi
ekspordi kõik päringu tulemused
(5)
Salvesta TXT fail
prindi
Märgitud kirjetega toimetamiseks ava
valitud kirjed
kuva
Bibliokirje
Lühikirje
reasta
autor kasvavalt
autor kahanevalt
ilmumisaasta kasvavalt
ilmumisaasta kahanevalt
pealkiri kasvavalt
pealkiri kahanevalt
1
artikkel ajakirjas EST
/
artikkel ajakirjas ENG
Concept for Energy Security Matrix
Kisel, Einari
;
Hamburg, Arvi
;
Härm, Mihkel
;
Leppiman, Ando
;
Ots, Märt
Energy policy
2016
/
p. 1-9 : ill
https://doi.org/10.1016/j.enpol.2016.04.034
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
artikkel ajakirjas EST
/
artikkel ajakirjas ENG
2
artikkel ajakirjas EST
/
artikkel ajakirjas ENG
Consolidating EU energy security by relying on energy de-politicisation
Keypour, Javad
;
Ahmadzada, Ulkar
European Security
2022
/
p. 135-157
https://doi.org/10.1080/09662839.2021.1970538
Journal metrics at Scopus
Article at Scopus
Journal metrics at WOS
Article at WOS
artikkel ajakirjas EST
/
artikkel ajakirjas ENG
3
artikkel ajakirjas
Energy security assessment of emerging economies under global and local challenges
Sotnyk, Iryna
;
Kurbatova, Tetiana
;
Kubatko, Oleksandr
;
Prokopenko, Olha
;
Prause, Gunnar Klaus
;
Kovalenko, Yevhen
;
Trypolska, Galyna
;
Pysmenna, Uliana
Energies
2021
/
art. 5860, 20 p. : ill
https://doi.org/10.3390/en14185860
artikkel ajakirjas
4
artikkel ajakirjas EST
/
artikkel ajakirjas ENG
European Union Energy Security : constructing a “Shelter” for small states’ energy security preservation
Keypour, Javad
Slovak Journal of Political Sciences
2022
/
p. 48-78
https://doi.org/10.34135/sjps.220103
Journal metrics at Scopus
Article at Scopus
artikkel ajakirjas EST
/
artikkel ajakirjas ENG
Seotud publikatsioonid
1
Applying reflexive-adaptive law for safeguarding the European Union’s Security of gas supply during the transition era = Refleksiivse-kohanduva õiguse rakendamine Euroopa Liidu gaasitarnekindluse tagamiseks üleminekuperioodil
5
artikkel ajakirjas
The Outcome of Directive 2009/73/EC Amendment on EU’s Natural Gas Security
Keypour, Javad
Baltic journal of economics
2019
/
p. 77-98 : ill
https://doi.org/10.1515/bjes-2019-0005
artikkel ajakirjas
Kirjeid leitud 5, kuvan
1 - 5
võtmesõna
569
1.
energy security
2.
energy security indicator
3.
energy forecast wind energy
4.
EROI-Energy returned on energy invested
5.
ad-hoc sensor networks security
6.
Automatic Security Verification
7.
Blockchain security
8.
cache security
9.
cloud security
10.
communication system security
11.
comprehensive system of economic security
12.
computer security
13.
cooperative security dilemma
14.
cyber security
15.
cyber security education
16.
cyber security exercises
17.
cyber security monitoring
18.
cyber security monitoring in maritime
19.
cyber security strategies
20.
cyber-physical system security
21.
cyber-security
22.
data and information security
23.
data security
24.
development of security cameras
25.
digital security practices
26.
drinking water security
27.
economic security
28.
economic security of enterprise
29.
emotional security
30.
Estonian information security standard
31.
graded security
32.
hardware security
33.
hardware security primitive
34.
high level of security
35.
Homeland security
36.
human security
37.
information security
38.
information security and privacy
39.
initial level of security
40.
internal security
41.
international security
42.
investment and innovation security
43.
IPv6 security
44.
IT security
45.
IT security management
46.
job security
47.
long-term security
48.
maritime cyber security
49.
maritime cyber security operations centers
50.
Maritime Security Operations Center (M-SOC)
51.
medium level of security
52.
metadata model for security measures
53.
Middle Eastern security
54.
Mobile security
55.
national cyber security strategy
56.
national security
57.
NATO. Science for Peace and Security Program
58.
network security
59.
network security monitoring
60.
OSCE (Organization for Security and Co-operation in Europe)
61.
passenger’s security
62.
policy-based routing security
63.
political and security cultures
64.
post-quantum security
65.
power system security
66.
quantitative security
67.
regional security
68.
RISC-V Security Verification
69.
Safety and Security in Sea Transportation
70.
safety and security testing
71.
security
72.
security adaptation
73.
security alert prioritization
74.
security analysis
75.
security and justice (AFSJ)
76.
Security and political science
77.
security and privacy
78.
security and privacy in smart grids
79.
Security Assertion
80.
Security Assertion Mining
81.
security closure
82.
Security Coverage
83.
security dataset
84.
security dilemma
85.
Security evaluation
86.
security evaluation instruments
87.
Security Level Evaluation
88.
Security limitations
89.
security log analysis
90.
security management
91.
security model
92.
security monitoring
93.
security notion
94.
security objectives
95.
security of data
96.
security of supply
97.
security operation center
98.
security operations center
99.
security patterns
100.
security policy
101.
security problem definition
102.
security proof
103.
security protocols
104.
security requirements
105.
security requirements engineering
106.
security research
107.
security risk assessment
108.
security risk management
109.
security risks
110.
security science and technology
111.
security strategies
112.
security systems for military objects
113.
security testing
114.
security training
115.
security verification
116.
security-by-design
117.
social security planning
118.
societal security
119.
software security
120.
software security level
121.
software security subcharacteristics
122.
sufficient level of security
123.
system of economic security
124.
system security
125.
terrorism security
126.
transmission System Security
127.
voting privacy and security
128.
activation energy
129.
alternative energy production
130.
annual energy simulation
131.
balancing wind energy
132.
batteries energy storage
133.
battery energy storage
134.
battery energy storage degradation
135.
battery energy storage system
136.
battery energy storage systems
137.
battery energy storage systems (BESS)
138.
binding energy
139.
bio-energy
140.
Black Sea energy resources
141.
Bluetooth low-energy tracking technology
142.
braking energy
143.
building energy efficiency
144.
building energy management systems
145.
building energy modelling
146.
building energy performance
147.
building energy performance simulations
148.
building energy renovation
149.
building energy simulation
150.
building energy use
151.
carbon-neutral energy supply
152.
clean energy
153.
climate/energy policy
154.
CO2 emissions energy renovation
155.
corporate energy self-sufficiency
156.
cortical and hippocampal energy metabolism
157.
cost of energy performance
158.
criteria of energy efficiency
159.
cumulative wave energy
160.
cyber physical energy systems
161.
cyber-physical energy systems
162.
daily cumulative energy curves
163.
deep energy levels
164.
deep energy renovation
165.
devices for energy harvesting
166.
DHW energy use
167.
digital tools for energy users
168.
direct energy deposition
169.
directed energy deposition
170.
distributed activation energy model
171.
distributed energy resources
172.
distributed energy resources (DERs)
173.
Distributed energy storage
174.
distributed energy systems
175.
district energy
176.
district energy sector
177.
dual-energy x-ray absorptiometry
178.
early stage energy assessment
179.
electric energy storage
180.
electric energy substitution
181.
electrical energy
182.
electrical energy market
183.
electricity energy use
184.
Electrochemical energy conversion/storage
185.
electrochemical energy storage
186.
embodied energy
187.
empirical energy consumption model
188.
energy
189.
energy management
190.
energy absorption
191.
energy access
192.
energy acquis
193.
energy and carbon balance
194.
energy and cost savings
195.
energy and East and Central Europe
196.
energy and HVAC-systems in buildings
197.
energy and society
198.
energy as generator of the dynamics
199.
energy assessment
200.
energy audit
201.
energy autarky
202.
energy autonomy
203.
energy balance
204.
energy balancing
205.
energy barrier
206.
energy buildings
207.
energy calculation for air heating
208.
energy calculations
209.
energy calculator
210.
energy cascade
211.
energy challenges
212.
energy class
213.
energy communities
214.
energy community
215.
energy competitiveness
216.
energy conservation
217.
energy consumption
218.
energy consumption of construction operations
219.
energy contracting
220.
energy control
221.
energy control unit (ECU)
222.
energy conversion
223.
energy conversion efficiency
224.
energy cost
225.
energy crisis
226.
energy demand
227.
energy detection
228.
energy dispersive spectroscopy
229.
energy dispersive x-ray spectroscopy
230.
energy dissipation
231.
energy districts
232.
energy efficiency
233.
energy efficiency (EE)
234.
energy efficiency and saving
235.
Energy Efficiency Design Index (EEDI)
236.
energy efficiency directive
237.
Energy efficiency measurement
238.
energy efficiency measures
239.
energy efficiency of AHU
240.
energy efficiency regulations
241.
energy efficient
242.
energy efficient buildings
243.
energy engineering
244.
energy exchange
245.
energy expenditure
246.
Energy flexibility
247.
energy flexibility indices
248.
energy flow
249.
energy flux
250.
energy for free
251.
energy forecast
252.
energy forecasting
253.
energy futures
254.
energy generation
255.
energy grid
256.
energy growth
257.
energy harvesting
258.
energy informatics
259.
energy integration
260.
energy internet
261.
energy laboratory
262.
energy levels
263.
energy localization
264.
Energy loss
265.
energy losses
266.
energy management
267.
Energy Management in Microgrid
268.
energy management strategies (EMS)
269.
energy management system
270.
energy management system (EMS)
271.
energy market
272.
energy market in the EU
273.
energy markets
274.
energy metabolism
275.
energy modeling
276.
energy modelling
277.
energy models
278.
energy optimization
279.
energy perfomance of buildings
280.
energy performance
281.
energy performance building directive (EPBD)
282.
energy performance certificate
283.
energy performance certificates (EPC)
284.
energy performance gap
285.
energy performance minimum requirements
286.
energy performance of buildings
287.
Energy Performance of Buildings Directive (EBPD)
288.
energy performance of buildings directive (EPBD)
289.
energy piles
290.
energy planning
291.
energy policy
292.
energy politics
293.
energy potential
294.
energy poverty
295.
energy prediction
296.
energy prices
297.
energy pricing
298.
energy priorities in Europe
299.
energy production
300.
energy recovery
301.
energy reduction
302.
energy refurbishment
303.
energy regulation
304.
energy related
305.
energy renovation
306.
energy renovations
307.
energy resilience
308.
energy resources
309.
energy retrofit
310.
energy retrofitting
311.
energy roadmap
312.
energy router
313.
energy saving
314.
energy saving cars
315.
energy saving device (ESD)
316.
energy saving devices
317.
energy saving measures
318.
energy savings
319.
energy science and technology
320.
energy sector
321.
energy simulation
322.
energy simulation software
323.
energy simulations
324.
energy stability
325.
energy states
326.
energy storage
327.
energy storage device
328.
energy storage devices
329.
energy storage dimensioning
330.
energy storage system
331.
energy storage system (ESS)
332.
energy storage systems
333.
energy storage systems (ESS)
334.
energy supplies
335.
energy sustainability
336.
energy system
337.
energy system analysis
338.
energy system management
339.
energy system model
340.
energy system modeling
341.
energy systems
342.
energy targets
343.
energy technologies
344.
energy trading
345.
energy transaction
346.
energy transfer
347.
energy transition
348.
energy use
349.
energy use baseline
350.
energy use prediction
351.
energy use reduction
352.
energy yield
353.
energy yield prediction
354.
energy-as-a-service
355.
energy-awareness
356.
Energy-based evaluation
357.
energy-efficiency
358.
energy-efficient buildings
359.
energy-efficient computing
360.
energy-efficient stimulation
361.
energy-management system
362.
energy-renovation
363.
Eu Energy Law
364.
European energy policy
365.
expeditionary energy
366.
final energy
367.
flywheel energy storage systems (FESS)
368.
free energy principle
369.
Free-energy principle
370.
generation of electric energy
371.
geothermal energy
372.
geothermal energy recovery
373.
green and energy efficient housing
374.
green energy
375.
heating and cooling energy cost
376.
heating and electricity energy use normalization
377.
heating energy system
378.
heating energy use
379.
Helmholtz free energy
380.
high energy ballmilling
381.
high energy milled activation
382.
high energy milling
383.
High energy physics
384.
high penetration of renewable energy sources (RESs)
385.
high-energy astrophysics
386.
high-energy ball milling
387.
high-energy milling
388.
high-penetration renewable energy
389.
high-penetration renewable energy sources (RESs)
390.
home battery energy storage system (HBESS)
391.
home energy management
392.
home energy management system
393.
home energy management systems
394.
hybrid energy source
395.
Hybrid Energy Storage Systems
396.
hybrid energy system
397.
hybrid renewable energy system
398.
hydrogen energy storage
399.
implications of energy data
400.
indoor and outdoor energy harvesting
401.
indoor energy harvesting
402.
innovative energy services
403.
integrated energy service provider (IESP)
404.
integrated energy system
405.
integrated energy systems
406.
intermolecular interaction energy
407.
internet of things (IoT) for renewable energy
408.
intracellular energy unit
409.
joint energy-spectral efficiency (ESE)
410.
kinetic energy
411.
Laser energy density
412.
laser-assisted directed energy deposition
413.
levelized cost of energy
414.
levelized cost of energy (LCOE)
415.
linear free energy (LFE) relationships
416.
local energy communities
417.
local energy community
418.
local energy market
419.
low energy building
420.
low energy buildings
421.
low energy house
422.
low energy office building
423.
low energy renovation
424.
low-energy building
425.
low-energy buildings
426.
Marine renewable energy
427.
maritime energy contract
428.
mechanical engineering and energy technology
429.
minimum energy
430.
multi-energy microgrid
431.
national energy policy
432.
near zero energy building
433.
nearly zero energy building
434.
nearly zero energy buildings
435.
nearly zero energy buildings (nZEB)
436.
nearly zero-energy building
437.
Nearly Zero-Energy Buildings
438.
nearly-zero energy buildings
439.
nearly-zero energy-building
440.
net zero energy buildings
441.
net-zero energy
442.
nexus water-energy-food
443.
nonlinear energy sink (NES)
444.
Novel energy storage systems
445.
nZEB deep energy renovation
446.
nuclear energy
447.
offshore wind energy
448.
off-shore wind energy
449.
operational energy
450.
optimal energy management
451.
optimal multi-energy flows
452.
PED – positive energy district
453.
peer-to-peer energy trading
454.
PEN – positive energy neighbourhood
455.
personalized energy management systems (PEMS)
456.
PES (primary energy savings)
457.
photovoltaic energy
458.
photovoltaic energy converter
459.
photovoltaic energy converters
460.
photovoltaic energy forecasting
461.
piezoelectric energy harvesting
462.
plowing energy
463.
plus energy house
464.
positive energy districts design
465.
potential energy barrier
466.
potential energy surface
467.
potential energy surfaces
468.
power electronic interfaces for renewable energy sources
469.
primary energy
470.
primary energy efficiency
471.
primary energy factor (PEF)
472.
primary energy factors
473.
primary energy indicator
474.
primary energy indicators
475.
primary energy requirement
476.
primary energy use
477.
pumped-hydro energy storage
478.
PV energy storage
479.
Q42 - alternative energy sources
480.
quantum-enhanced secure and energy-efficient routing (QSEER) protocol
481.
reactive energy
482.
real energy use
483.
Regional integrated energy system (RIES)
484.
renewable energy
485.
Renewable energy certificates (RECs)
486.
renewable energy contribution
487.
Renewable energy generation
488.
renewable energy integration
489.
Renewable energy optimization in buildings
490.
renewable energy ratio
491.
renewable energy recovery
492.
renewable energy resources
493.
Renewable energy source
494.
renewable energy source (RES)
495.
renewable energy sources
496.
renewable energy sources (RES)
497.
Renewable energy sources (RESs)
498.
renewable energy storage
499.
renewable energy system
500.
renewable energy systems
501.
renewable energy systems (RES)
502.
renewable energy technology
503.
renewable-energy policy
504.
residential battery energy storage system
505.
residential energy
506.
residential energy management
507.
residential energy storage
508.
residential energy storage systems
509.
residential wind energy conversion system
510.
RF energy
511.
seasonal energy imbalance
512.
ship energy efficiency
513.
short-term energy management
514.
simulation of energy consumption
515.
single energy market
516.
sliding energy
517.
smart energy
518.
smart energy management system (SEMS)
519.
smart energy platform
520.
smart energy services
521.
smart green energy systems
522.
solar energy
523.
solar energy materials
524.
solar energy utilization
525.
solar photovoltaic energy
526.
solar PV energy
527.
specific energy
528.
specific energy consumption
529.
specific energy model
530.
Storable chemical energy
531.
strategic energy planning
532.
superconducting magnetic energy storage (SMES)
533.
sustainable energy management
534.
sustainable energy
535.
Zero energy
536.
zero-energy buildings
537.
targeted energy transfer (TET)
538.
Themal energy storage
539.
thermal energy
540.
thermal energy storage
541.
thermal energy storage (TES)
542.
thermochemical energy storage
543.
third energy package
544.
Time of Use energy price
545.
transactive energy
546.
transactive energy system
547.
tumor energy metabolism
548.
Urban Building Energy Modeling (UBEM)
549.
variability of energy flux
550.
variability of renewable energy
551.
variable renewable energy (VRE)
552.
variable wind and solar energy
553.
waste to energy
554.
water-energy systems
555.
wave energy
556.
wave energy converter (WEC)
557.
Wave energy converters
558.
wave energy flux
559.
wave energy resource assessment
560.
vertical kinetic energy variability
561.
wide band gap energy
562.
wind energy
563.
wind energy farms
564.
wind energy forecast errors
565.
wind energy generation
566.
wind energy production
567.
virtual energy storage
568.
EU-LISA (European Agency for the Operational Management of large-scale IT Systems in the Area of Freedom, Security and Justice)
569.
UN GGE (United Nations Group of Governmental Experts on Developments in the Field of Information and Telecommunications in the Context of International Security)
märksõna
5
1.
National Computer Security Incident Response Teams (N-CSIRTs)
2.
USS Security Eesti AS
3.
Energy Efficient Vehkle
4.
Nordic Energy Research
5.
Respect Energy Holding
×
vaste
algab
lõpeb
sisaldab
reasta
Relevantsuse alusel
kasvavalt
kahanevalt
ilmumisaasta
autor
TTÜ struktuuriüksus
märksõna
seeria-sari
tema kohta
võtmesõna
Otsing
Valikud
0
ilmumisaasta
AND
OR
NOT
autor
AND
OR
NOT
TTÜ struktuuriüksus
AND
OR
NOT
märksõna
AND
OR
NOT
seeria-sari
AND
OR
NOT
tema kohta
AND
OR
NOT
võtmesõna
AND
OR
NOT