Searching - TalTech Research Portal

power system protection (keyword)

—

Add criteria Simple search filter

Clear

types of item

book ..

journal article ..

newspaper article ..

book article ..

dissertation ..

Open Access ..

Scientific publications ..

year

year of publication

author

TalTech department

subject term

series

name of the person

keyword

Clear

export all inquiry results (3)
Save TXT fail

print
Open for editing with marked entries my bookmarks

display

sort
1

journal article EST / journal article ENG

Comprehensive Diagnostic Assessment of Inverter Failures in a Utility-Scale Solar Power Plant : A Case Study Based on Field and Laboratory ValidationKull, Karl; Asad, Bilal; Naseer, Muhammad Usman; Kallaste, Ants; Vaimann, ToomasSensors2025 / art. 3717 https://doi.org/10.3390/s25123717

journal article EST / journal article ENG
2

book article

Cyber attacks on power system automation and protection and impact analysisRajkumar, Vetrivel Subramaniam; Tealane, Marko; Stefanov, Alexandru; Presekal, Alfan; Palensky, PeterProceedings of 2020 IEEE PES Innovative Smart Grid Technologies Europe (ISGT-Europe), 26-28 October, 20202020 / p. 247–254 https://doi.org/10.1109/ISGT-Europe47291.2020.9248840

book article
3

journal article EST / journal article ENG

A detailed testing procedure of numerical differential protection relay for EHV auto transformerEhsan, Umer; Jawad, Muhammad; Javed, Umar; Zaidi, Khurram Shabih; Rehman, Ateeq Ur; Rassõlkin, Anton; Althobaiti, Maha M.; Hamam, Habib; Shafiq, MuhammadEnergies2021 / art. 8447 https://doi.org/10.3390/en14248447 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

journal article EST / journal article ENG

Number of records 3, displaying 1 - 3

1. power system protection
2. car frontal protection system
3. system protection schemes
4. aircraft electric power system
5. consumer power system
6. cyber physical power system (CPPS)
7. Egyptian power system
8. electric power storage system
9. electric power system control
10. electric power system stability
11. faults in power system
12. fluid power feeding system with a pneumo-hydraulic accumulator
13. fluid power system
14. hybrid power system
15. Interconnected power system
16. lithium batteries and power system modeling
17. local power supply system
18. Modern power system
19. multi-machine power system
20. power distribution system
21. power system
22. power system analysis computing
23. power system control
24. power system dynamics
25. power system economics
26. power system faults
27. power system harmonics
28. power system management
29. power system measurements
30. power system modeling
31. power system modelling
32. power system operation
33. power system parameter estimation
34. power system planning
35. power system reliability
36. power system resilience
37. power system restoration
38. power system security
39. power system simulation
40. power system simulations
41. Power system stabilizer (PSS)
42. power system stability
43. power system transient stability
44. power-to-gas based storage system
45. power electronics applications in power systems and utilities
46. bidirectional protection
47. civilian protection
48. combined relay protection and transient stability simulations
49. commercial legal protection
50. configurable protection devices
51. consumer protection
52. critical infrastructure protection
53. Crop protection
54. data protection
55. data protection
56. dc protection
57. electric vehicle (EV) battery protection
58. employment protection
59. Environment Protection
60. environmental protection
61. environmental protection awareness
62. fault protection
63. fire protection
64. fire protection material
65. Fish protection
66. flood protection
67. fork protection complex
68. frost protection
69. GDPR (General Data Protection Regulation)
70. general data protection regulation
71. glare protection
72. health protection
73. heritage protection
74. Import protection and substitution
75. IP protection
76. maternity protection
77. nature protection
78. Nigeria's National data protection regulation
79. open circuit protection
80. out-of-step protection
81. over current protection
82. overcurrent protection
83. over-current protection
84. overload protection
85. over-voltage protection
86. personal data protection
87. Personal Data Protection Act
88. protection
89. protection against wood rotting
90. protection against wood rotting fungi
91. protection function
92. protection motivation theory
93. protection non operation
94. protection of dissenting minority shareholders
95. protection of social rights
96. protection of species
97. protection of the coasts
98. protection of the environment
99. protection of wood
100. protection profile
101. radiation protection
102. relay protection
103. reliable protection
104. right to social protection
105. series Protection devices
106. short circuit protection
107. short-circuit protection
108. social protection
109. social rights protection
110. soft error protection
111. under voltage protection
112. user rights protection
113. wear protection
114. Wide-Area protection
115. AC power converters
116. AC/DC power converter
117. ac/dc-dc power converters
118. AC‐AC power convertors
119. ac-dc power conversion
120. AC-DC power converter
121. AC-DC power converters
122. active power
123. active power decoupling
124. adaptive power allocation
125. alpha power variability
126. auxiliary power supply
127. balance of power
128. balancing power
129. bidirectional power flow
130. bidirectional power flow control
131. bidirectional power transfer
132. bisection based optimal power allocation
133. boost power converter
134. buck-boost full power converter
135. buck–boost power converter
136. capabilities of power electronics
137. capacitive power transfer
138. CHP (combined power and heat)
139. combined heat and power
140. combined heat and power economic dispatch (CHPED)
141. combined heat and power plant
142. common-ground power converter
143. concentrated solar power
144. condensing power plant
145. connection power
146. constant power load
147. constant power source
148. consumed power minimization
149. consumer-perceived power
150. contribution to power quality deterioration
151. conventional power plant
152. cyber power Europe
153. DC power supply
154. DC/DC power conversion
155. DC/DC power converters
156. DC-AC power conversion
157. DC-AC power converters
158. DC-AC power convertors
159. DC-DC power conversion
160. DC‐DC power conversion
161. DC-DC power converter
162. DC-DC power converters
163. DC–DC power converters
164. DC-DC power convertors
165. DC‐DC power convertors
166. Differential Power Analysis (DPA)
167. differential power processing (DPP)
168. dimensioning cooling power
169. directional power spectral density
170. Discrete power device
171. distributed power
172. distributed power generation
173. distributed power systems
174. distrubuted power generation
175. double power-law
176. dual-purpose dc-dc/ac power converter
177. economic power dispatch
178. electric power distribution
179. electric power generation
180. electric power systems
181. electric power transmission
182. electric power transmission networks
183. electric power utilization
184. electrical power domain
185. electrical power quality
186. electrical power systems
187. emerging power converters
188. flexibility in power systems
189. fossil fuel power plants
190. fractional power zero-pole
191. fuel cell power systems
192. full power converter
193. full power Z -source converter
194. functional power plants
195. functional power-plants
196. GaAs power devices
197. galvanically isolated DC-DC power converter
198. Geological Power Bank
199. global maximum power point
200. global power sharing
201. grid-connected power supply
202. grid-forming power converters
203. heat and power plant
204. heating power
205. high percentage of wind power
206. high power density
207. high step-up power converter
208. high voltage power converters
209. hydraulic power
210. hydroelectric power generation
211. hydroelectric power station (HEPS)
212. inductive power transfer
213. inductive power transfer (IPT)
214. inductive power transmission
215. inductive wireless power transfer link
216. industrial power systems
217. instantaneous power balancing
218. integration of solar power plants
219. isolated power conditioning unit (PCU)
220. isolated power converters
221. Kalman-filter based maximum power point tracking (KF-MPPT)
222. leakage current and reactive power supporting
223. limited power
224. low power
225. low-power ASIC design
226. low-power decoupling
227. low-power designs
228. low-power device
229. market power
230. market power mitigation
231. maximum available power
232. maximum power point
233. maximum power point tracker
234. Maximum power point trackers
235. maximum power point tracking
236. maximum power point tracking (MPPT)
237. medium voltage power cables
238. Mini-block power plant
239. module level power electronics (MLPE)
240. module-level power electronics (MLPE)
241. multi-machine industrial power plant
242. narrowband power line communications
243. non-active power
244. non-coercive power
245. normative power
246. nuclear power
247. off-grid hybrid power supply
248. Off-shore wind power
249. offshore wind power plants
250. oil shale-fired power plants
251. oil-shale power generation
252. parallel active power filter
253. partial power based on buck-boost resonance converter
254. partial power based on isolated Z - Source converter(PPZSC)
255. partial power conversion
256. partial power converter
257. partial power converter (PPC)
258. partial power converters
259. partial power converters (PPC)
260. partial power processing
261. Partial power processing (PPP)
262. peak power limiting
263. photovoltaic power plant
264. photovoltaic power systems
265. power
266. power allocation
267. power amplifier
268. Power amplifiers
269. power aware computing
270. power balance
271. power based control
272. power bed fusion
273. power cable
274. Power cables
275. power capacitors
276. power chart
277. power combiner
278. power conditioner
279. power conditioning
280. power conditioning units (PCUs)
281. power consensus
282. power consumption
283. power consumption of production
284. power control
285. power conversion
286. power converter
287. power converter interfaces
288. power converters
289. power converters design
290. power converters for EV
291. power decoupling
292. Power Delay Product (PDP)
293. power delivery network
294. power demand
295. power density
296. power devices
297. power diodes
298. power dissipation
299. power disspation
300. power distribution
301. power distribution control
302. power distribution faults
303. power distribution lines
304. power distribution network
305. power electronic building block
306. power electronic converter
307. power electronic converters
308. power electronic interfaces
309. power electronic interfaces for renewable energy sources
310. power electronic transformer
311. power electronics
312. power electronics (PE)
313. power electronics converter
314. power electronics converters
315. power electronics solutions
316. power engineering
317. power engineering computing
318. power exchange
319. power factor
320. power factor correction
321. power factor correction (PFC)
322. power flow
323. power flow equations
324. power forecasting
325. power frequency
326. power generation
327. power generation dispatch
328. power generation economics
329. power generation planning
330. power grid
331. power grid imbalance
332. power grid project
333. power grids
334. power harmonic filters
335. power imbalance
336. Power industry
337. power injection
338. power inverter
339. power inverters
340. Power Iteration Clustering (PIC)
341. power law
342. Power leveling strategy
343. power limitation
344. power line communication
345. power line construction
346. power loss
347. power loss minimization
348. power loss model
349. power losses
350. power management
351. power market model
352. power markets
353. power measurement
354. power mismatch analysis
355. power module
356. power MOSFET
357. power of discrimination
358. power optimization
359. power optimizer
360. Power oscillation damping controller (PODC)
361. power outage
362. Power Plant
363. power plant cycling
364. power plant pollution
365. Power plants
366. power quality
367. Power quality (PQ)
368. power quality benchmarking
369. power quality case study
370. Power Quality Disturbances (PQD)
371. power quality disturbances (PQDs)
372. power quality legislation
373. power quality measurement
374. power quality measurement equipment
375. power quality measurements
376. power quality monitoring
377. power quality parameters
378. power reduction
379. power reliability
380. power semiconductor device
381. power semiconductor devices
382. power semiconductor switches
383. power series
384. power sharing
385. power signature
386. power smoothing
387. power sources
388. power spectral density
389. power spectrum
390. Power storage
391. power supplier
392. power supplies
393. power supplies to apparatus
394. power supply
395. power swings
396. power systems
397. Power systems expansion
398. power systems flexibility
399. power sytems
400. power to hydrogen technology
401. power transfer distribution factor
402. power transformers
403. power transistors
404. power transmission
405. power transmission lines
406. power variations
407. power verification
408. power-aware
409. power-electronic converters
410. power-factor correction
411. power-flow equations
412. power-hardware-in-the-loop
413. power-laws
414. power-sharing
415. Power-to-heat
416. power-to-hydrogen
417. power-to-X
418. PQ (Power Quality)
419. PQM (Power Quality Monitoring)
420. pulse width modulated power converters
421. pulsed power load (PPL)
422. pulsewidth-modulated power converters
423. PV module level power electronics
424. PV power generation
425. PV power output
426. PV power plant
427. reactive power
428. reactive power compensation
429. reactive power control
430. reactive power injection
431. reactive power management
432. reactive power provision
433. relative band power
434. relative gamma power
435. resonant power convertors
436. reverse power flow
437. reverse power transfer
438. r-th power residue symbol
439. series partial power converter (S-PPC)
440. series partial power converter (S-PPC) based on the push-pull
441. shade-tolerant maximum power point tracking (MPPT)
442. shale oil and power cogeneration
443. shunt active power filter
444. smart power electronics
445. smart power grids
446. Soft power
447. solar power
448. solar power forecasting
449. solar power generation
450. solar power plant integration
451. space-based solar power
452. static power converters
453. surplus power factor
454. sustainable power engineering
455. switch mode power supply
456. switched mode power supplies
457. switched-mode power supplies
458. switchedmode power supply
459. switched-mode power supply
460. symbolic power
461. talkative power conversion
462. thermal power plant
463. thermal power plants
464. Thermal Power Station
465. theta band power
466. three-phase power factor correction (PFC) converter
467. time-delay renewable power systems
468. topological power plant
469. topology/power control
470. Unified power flow controller (UPFC)
471. uninterruptible power supply (UPS)
472. wave power
473. welding power supply
474. wind power
475. wind power forecasting
476. wind power generation
477. wind power generators
478. wind power plants
479. wind power production
480. Wind-photovoltaic-thermal-bundled power
481. wireless power transfer
482. virtual power plant
483. virtual power plant (VPP)
484. virtual power plants
485. virtual power plant's (VPPs)
486. working power of luminaires
487. voting power
488. 15min power balance
489. active distribution system
490. Adaptive network-based fuzzy inference system (ANFIS)
491. Adaptive virtual inertia system
492. advanced driver assistance system
493. agri-food system
494. air transportation system
495. AIS navigation tracking system
496. algebraic weak factorisation system
497. allocation system
498. Android (operating system)
499. anomaly detection for system logs
500. antilock braking system
501. anti-lock braking system
502. anti–lock braking system
503. ascending hierarchical grid system
504. asynchronous system
505. Automated Bonding Evaluation System
506. Automated placement system
507. Automatic identification system
508. automatic identification system (AIS)
509. autonomic nervous system
510. Autonomous Identification System (AIS)
511. Autonomous Maritime Surveillance System (AMSS)
512. autonomous parking system
513. autonomous system
514. ball and beam system
515. Ballast water treatment system
516. banking system
517. barotrauma detection system
518. Barotrauma detection system sensors
519. battery energy storage system
520. battery energy storage system (BESS)
521. Battery management system
522. Battery system
523. BeiDou Navigation Satellite System (BDS)
524. bicycle-sharing system
525. Biological system modeling
526. biological system modelling
527. biosensing system
528. bipolar electrode system
529. blended braking system
530. Board and System Test
531. braking system
532. bridge management system
533. Building Automation and Control System (BACS)
534. building service system
535. Business School Impact System (BSIS)
536. CAD/CAM system
537. Cambrian-Vendian aquifer system
538. capture system
539. carbonate system
540. cardiovascular system
541. cartesian system model
542. catching-up innovation system
543. CAVE-like system
544. cell broadcast system (CBS)
545. cell management system
546. central nervous system
547. central nervous system lymphoma
548. centralized control system
549. chaotic system
550. city transport system
551. climate and earth system modelling
552. closed distribution system
553. cloud- and AI-based system
554. cloud manufacturing operating system
555. cloud operating system
556. coastal forecasting system
557. cognitive system engineering
558. collision alert system
559. communication system security
560. complex adaptive system
561. comprehensive system of economic security
562. compressed air system
563. computer algebra system
564. condition monitoring system
565. context aware recommender system (CARS)
566. context-aware recommender system
567. control system
568. control system analysis
569. control system design
570. control system for grid integration
571. control system stability
572. control system synthesis
573. COOR system
574. corporate performance monitoring system
575. court information system
576. Cyber Physical Production System
577. cyber physical social system
578. cyber physical system
579. cyber-physical social system (CPSS)
580. cyberphysical system
581. cyber-physical system
582. Cyber-Physical System (CPS)
583. cyber-physical system logistic robot
584. data acquisition system
585. database management system
586. database management system (DBMS)
587. decision support system
588. decision support system (DSS)
589. decision support system for housing
590. design system
591. DHW influence on DH system dimensioning
592. digital decision support system
593. Digital decision support system (DDSS)
594. digital Last Planner System whiteboard
595. disaster relief system
596. discrete-time system
597. distributed system
598. distribution system
599. distribution system modelling
600. diverse system
601. document management system
602. double interceptor system
603. double-cabled system
604. drive system
605. dynamic system
606. Earth observing system
607. earth system modelling
608. earth system study
609. efficiency of flywheel storage system
610. e-Health system
611. electric vehicle propulsion drive system
612. electrical storage system
613. electricity system
614. electricity-heating system
615. electrode-tissue system
616. electro-hydraulic servo-system
617. Electronic Education System Model-2
618. Electronic record management system
619. embedded system
620. end-to-end model-based system
621. energy management system
622. energy management system (EMS)
623. energy storage system
624. energy storage system (ESS)
625. energy system
626. energy system analysis
627. energy system management
628. energy system model
629. energy system modeling
630. energy-management system
631. environmental management system
632. e-permitting system
633. e-state system
634. Estonian accounting system
635. Estonian National Health Information System
636. estonian national health information system (ENHIS)
637. Estonian nationwide Health Information System (EHIS)
638. EU regulatory system for medicines
639. European arrest warrant system (EAW)
640. European legal system
641. European Vertical Reference System (EVRS)
642. exchange rate system
643. exhaust system
644. experimental system
645. External Thermal Insulation Composite System
646. External Thermal Insulation Composite System (ETICS)
647. external thermal insulation composite system ETICS
648. factorization system
649. financial system
650. fixed exchange rate system
651. flexible manufacturing system
652. floor heating system
653. flow system
654. flow-trough system
655. food system
656. four-electrode system
657. four-wire system
658. fractional singular system
659. fractional-order system
660. GaN system
661. Gasifier system
662. Geographic Information System (GIS)
663. geographical information system
664. Georgian legal system
665. Global Maritime Distress and Safety system (GMDSS)
666. global ocean observing system
667. Global Positioning System (GPS)
668. GNU/Linux System Hardening
669. green manufacturing system
670. grid-connected PV system
671. habitation system
672. harmonized system taxonomy
673. health care system
674. health system
675. heat emission system
676. heating energy system
677. heating system
678. height system realization
679. height system unification
680. home battery energy storage system (HBESS)
681. home energy management system
682. human factors in vehicular system
683. human-machine system
684. HVAC system
685. hybrid energy storage system
686. hybrid energy system
687. hybrid renewable energy system
688. hydraulic system
689. IEEE 9 bus test system
690. immune system
691. industrial control system (ICS)
692. influence on DH system dimensioning
693. information processing system
694. information system
695. Information System Authority (RIA)
696. inlet system
697. innovation system
698. in-system programming
699. integrated electricity and natural gas system (IEGS)
700. integrated energy system
701. Integrated navigation system
702. integrated programming system
703. integrated system of performance analysis
704. integrated waste management system
705. intelligent decision support system
706. intelligent transport system
707. international system
708. intrusion detection system
709. intrusion detection system (IDS)
710. intrusion response system
711. INVAR neuromarketing method and system
712. IT system landscapes
713. IT system maturity
714. ITS (Intelligent Transportation System)
715. Kanban (pull system)
716. Knowledge management system
717. knowledge-based system
718. laboratory inforation management system (LIMS)
719. laboratory information management system (LIMS)
720. large-scale district heating system
721. Last Planner System
722. Last Planner System (LPS)
723. lean manufacturing system
724. learning management system
725. leasing reporting system
726. legal system
727. library system
728. linear control system
729. low system strength
730. low-level control system transportation
731. lowpower embedded system
732. magnetic levitation system
733. manufacturing execution system
734. manufacturing execution system (MES)
735. marine carbon dioxide system
736. Maxwell system
737. meandering river system
738. measuring system
739. mechanical ventilation system
740. mechatronics system control
741. medical decision support system (MDSS)
742. medical system
743. MET system in Estonia
744. meta-system
745. Milliken-Taylor system near zero
746. mixed surfactant system
747. mixed-critical system
748. mobile cyber-physical system
749. mobile information system
750. modern system-on-chips (SoCs)
751. modified Peregrine system
752. modular system
753. monetary system
754. monitoring system
755. motion capture system
756. motor-drive system
757. multi agent system
758. multi-agent system
759. multi-agent system (MAS)
760. Multi-area coordination of integrated electricity and natural gas transmission system
761. multiple-input multiple output system
762. multi-port system
763. multi-processor system-on-chip
764. multi-processor system-on-chips (MPSoCs)
765. multi-pump system
766. multirate system
767. Muti-Processor System on Chip (MPSoC)
768. national innovation system
769. natural ventilation system
770. navigation system
771. nervous system
772. network intrusion detection system
773. neuro-fuzzy system
774. news recommendation system
775. nonlinear control system
776. nonlinear dynamic system
777. nonlinear system
778. nonnegative solution to the system of linear equations
779. normalized system
780. normalized system (NS)
781. occupational health and safety management system
782. offer management system
783. on-site PV system
784. operating system
785. optical system
786. optoelectronic system
787. orthographic system modeling
788. performance management system
789. performance measurement system
790. photovoltaic system
791. photovoltaic system (PV)
792. Pichia pastoris expression system
793. planning support system (PSS)
794. port community system
795. portable medical system
796. portable system
797. powertrain system
798. processing system
799. procurement system structure
800. production monitoring system
801. production monitoring system (PLM)
802. production monitoring system (PMS)
803. production performance evaluation system
804. programmable system-on-chip
805. propeller and propulsion system
806. propulsion drive system
807. PV system
808. PV System 200kW
809. quality system
810. radiator heating system
811. rail transit system
812. railway system modelling
813. rainwater drainage system
814. rating system
815. real-time tariff system
816. recommendation system
817. recommender system
818. reconfigurable manufacturing system
819. Regional integrated energy system (RIES)
820. renewable energy system
821. renewable-based hybrid system
822. renin–angiotensin system
823. renin-angiotensin system inhibitors
824. reporting system
825. research-funding system
826. residential battery energy storage system
827. residential wind energy conversion system
828. rigorous formal diagrammatic system
829. river system
830. robot operating system
831. Robot Operating System (ROS)
832. rule system
833. safety management system
834. sample collection system
835. Satellite Autonomous Identification System (SAIS)
836. SCADA system
837. self learning system
838. servo system
839. shear wall system
840. Shock system
841. single phase system
842. single-phase system
843. single-stage system
844. singular system
845. SIS II (Schengen Information System II)
846. Si-SiO2 system
847. smart drainage system
848. smart energy management system (SEMS)
849. smart waste management system
850. social system theory
851. socio-economic system change
852. sociotechnical system
853. socio-technical system
854. Solar tracking system
855. spread and development of new policy instruments (environmental taxes and charges system)
856. standards-based classfication system
857. stochastic port-Hamiltonian system
858. storage system
859. support system
860. suspension system
861. sustainable urban drainage system
862. system
863. system analysis
864. system analysis and design
865. system approach
866. system architecture
867. system architectures
868. system calls
869. system catalog
870. system Cu-Al2O3
871. system design
872. system dynamics
873. system engineering
874. system evaluation
875. system flexibility
876. system GMM
877. system identification
878. system integrated analysis
879. system integration
880. system level
881. system level hazards
882. system level simulation
883. system level test
884. system losses
885. system modeling
886. system monitoring
887. system of branded automotive service
888. system of economic security
889. system of linear inequalities
890. system of systems
891. system operator
892. system optimization
893. system performance
894. system planning level
895. system reliability
896. system restoration
897. system robustness
898. system security
899. system stabilization
900. system stability
901. system studies
902. system testing
903. system theory
904. system thinking
905. system throughput
906. system Validation
907. system vulnerability
908. system-level analysis
909. system-level evaluation
910. system-on-chip
911. system-to-software integrity
912. technological innovation system (TIS)
913. technological system
914. tetrapolar electrode system
915. Thermal Insulation Composite System (ETICS)
916. thermal management system
917. thin-layer rendering system
918. three-pillar system
919. TLC-antioxidant system
920. touch-free system design
921. Toyota production system
922. traffic information system (TIS)
923. transactive energy system
924. transition system
925. transmission system
926. transmission system operation
927. transmission system operator
928. transmission system operator (TSO)
929. transmission System Security
930. transport system efficiency
931. two-electrode system
932. UN system
933. Unified Patent Litigation System (UPLS)
934. unknown system
935. urban drainage system
936. urban drainage system modeling
937. urban drainage system modelling
938. value system
939. value-system
940. variable air volume system
941. warning system
942. vascular system
943. water distribution system
944. water distribution system modelling
945. water tank system
946. WC-Co system
947. ventilation system
948. VIS (Visa Information System)
949. workflow management system
950. 1 kV system
951. recommender system
952. 'Smart House' System

1. Department of Electrical Power Engineering and Mechatronics

1. Power, Ian M.

1. cell broadcast system (CBS)

power system protection (keyword)

types of item

keyword 952

subject term 2

TalTech department 1

author 1

TalTech subject term 1