Log in

Relevant bibliographies by topics / Engel / Journal articles

To see the other types of publications on this topic, follow the link: Engel.

Journal articles on the topic 'Engel'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Engel.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Meliss, Meike. "Und was kommt danach? Kontrastive Projekte und linguistische Pilgerreisen: Ein persönlicher Blick auf fast drei Dekaden Forschung von Ulrich Engel." Studia Germanica Gedanensia, no. 41 (November 23, 2019): 203–14. http://dx.doi.org/10.26881/sgg.2019.41.15.

Full text

Abstract:

Der Beitrag ist die Verschriftlichung der Laudatio, die die Autorin anlässlich des Festaktes zum 90. Geburtstag von Prof. Dr. Dr. h.c. mult. Ulrich Engel am Leibniz-Institut für Deutsche Sprache (=IDS) gehalten hat. Es handelt sich um eine persönliche Sicht auf fast drei Dekaden Forschungsarbeit, in denen zwischen Engel und der Germanistischen Abteilung der Universität Santiago de Compostela eine sehr enge Forschungskooperation bestand.

APA, Harvard, Vancouver, ISO, and other styles

2

McManus, Chris. "Engel, Engels, and the side of the angels." Lancet 365, no. 9478 (2005): 2169–70. http://dx.doi.org/10.1016/s0140-6736(05)66761-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Liu, Shi-Yong, Ning An, Xiang Fang, et al. "Surgical Treatment of Patients with Lennox-Gastaut Syndrome Phenotype." Scientific World Journal 2012 (2012): 1–10. http://dx.doi.org/10.1100/2012/614263.

Full text

Abstract:

Lennox-Gastaut syndrome (LGS) is a devastating and refractory generalized epilepsy affecting children and adolescents. In this study we report the results of resective surgery in 18 patients with LGS phenotype who underwent single-lobe/lesionectomy or multilobe resection plus multiple subpial transection and/or callosotomy. After surgery, seven patients became completely seizure-free (Engel Class I) and five almost seizure-free (Engel Class II). Additional four had significant seizure control (Engel Class III), and two had no change in seizure frequency (Engel Class IV). Of the 4 patients without any lesion on brain MRI, 2 ended with Engel Class II, 1 with III and the other with IV in Engels’ classification. Mean intelligence quotient (IQ) increased from 56.1 ± 8.1 (mean ± SD) before operation to 67.4 ± 8.2 (mean ± SD) after operation, a significant improvement (P=0.001). Results also indicated that the younger the patient at surgery, or the shorter the interval between onset of seizure and resective operation, the better the intellectual outcome. Our data suggest that resective epilepsy surgery can be successful in patients with LGS phenotype as long as the EEG shows dominance of discharges in one hemisphere and corresponding ipsilateral imaging findings, even with contralateral ictal discharges.

APA, Harvard, Vancouver, ISO, and other styles

4

Gray, Charlotte Schiander, and Klaus Rifbjerg. "Engel." World Literature Today 62, no. 4 (1988): 665. http://dx.doi.org/10.2307/40144630.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Li, Longfeng, Dmitry S. Kopylov, Alexandr P. Rasnitsyn, Jingtao Yang, Chungkun Shih, and Dong Ren. "New Wasps of Maimetshidae (Hymenoptera: Ceraphronoidea) from the Mid-Cretaceous Myanmar Amber." Insects 16, no. 3 (2025): 237. https://doi.org/10.3390/insects16030237.

Full text

Abstract:

One new genus and five new species of the extinct family Maimetshidae from mid-Cretaceous Kachin amber are described based on five well-preserved specimens as follows: Maimetshasia nova Li, Kopylov and Rasnitsyn, sp. nov.; Maimetshasia engeli Li, Kopylov and Rasnitsyn, sp. nov.; Guyotemaimetsha perrichoti Li, Kopylov and Rasnitsyn, sp. nov.; Guyotemaimetsha ortegablancoi Li, Kopylov and Rasnitsyn, sp. nov.; and Crucimaimetsha nigra Li, Kopylov and Rasnitsyn, sp. nov. A new generic synonymy is proposed: Turgonalus Rasnitsyn, 1990 (=Turgonaliscus Engel, 2016, syn. nov. and = Ahiromaimetsha Perrichot, Azar, Nel and Engel, 2011, syn. nov.); Guyotemaimetsha Perrichot, Nel and Néraudeau, 2004 (=Burmaimetsha Perrichot, 2013, syn. nov.); Afrapia, Rasnitsyn and Brothers, 2009 (=Afromaimetsha, Rasnitsyn and Brothers, 2009, syn. nov.); and Iberomaimetsha nihtmara Ortega-Blanco, Delclòs and Engel, 2011 are transferred to Afrapia, Rasnitsyn and Brothers, 2009. This results in the following new combinations: Turgonalus cooperi, Rasnitsyn and Jarzembowski, 1998, comb. resurr.; Turgonalus najlae (Perrichot, Azar, Nel & Engel, 2011), comb. nov; Afrapia robusta (Rasnitsyn & Brothers, 2009), comb. nov; and Afrapia nihtmara (Ortega-Blanco, Delclòs & Engel, 2011), comb. nov. The occurrence of various genera of Maimetshidae in amber and compression fossil and the morphological differences of the forewings in all the fossil species are provided, which highlights a high level of genus-level diversity among Mesozoic maimetshids. The key to genera was updated.

APA, Harvard, Vancouver, ISO, and other styles

6

Engel, Michael S., and Victor Gonzalez. "A new bee genus from the pampas of eastern Argentina, with appended notes on the classification of “paracolletines” (Hymenoptera: Colletidae)." Journal of Melittology, no. 109 (January 24, 2022): 1–39. http://dx.doi.org/10.17161/jom.i109.16424.

Full text

Abstract:

A new genus and species are described and figured from the eastern pampas of Tandil, Argentina. Aenarete roigi Engel & Gonzalez, new genus and species, is quite similar to Spinolapis Moure (here used in a restricted sense), occurring in southern Chile, and particularly Patagoniapis Engel, new genus (type species: Pasiphae cyanea Cockerell) from further southward in Argentina (Rio Negro to Tierra del Fuego). The genus is distinguished from these two genera and other South American “paracolletines”. Given the employment of different concepts for “paracolletine” genera herein and in recent published works relative to the classification outlined by Michener, a revised key to these groups is appended based on the genera as envisioned by the authors. This necessitates making available the following new taxa (eight new subtribes, 20 new genera, 13 new subgenera): Aageocolletes Engel, new genus; Aglaocolletes Engel, new genus; Asciocolletes Engel, new genus; Baeocolletina Engel, new subtribe; Bicolletopsis Engel, new subgenus of Bicolletes Friese; Calloproctus Engel, new genus; Chilicolletina Engel, new subtribe; Chrysopasiphae Engel, new genus; Conospermapis Engel, new genus; Cyanopasiphae Engel, new subgenus of Bicolletes; Cygnella Engel, new subgenus of Euryglossidia Cockerell; Cyranocolletes Engel, new genus; Damocrateia Engel, new genus; Donovanapis, new subgenus of Leioproctus Smith; Eremocolletes Engel, new genus; Erythropasiphae Engel, new subgenus of Bicolletes; Hexaproctus Engel, new genus; Houstoniella Engel, new subgenus of Eremocolletes; Kanakapis Engel, new subgenus of Lamprocolletes Smith; Leucopasiphae Engel, new subgenus of Perditomorpha Ashmead; Lonchorhynchina Engel & Gonzalez, new subtribe; Manocolletes Engel, new subgenus of Euryglossidia; Machaerocolletes Engel, new genus; Maoricolletes Engel, new subgenus of Leioproctus; Maynardapis Engel, new genus; Nanopasiphae Engel, new genus; Niltoniina Engel, new subtribe; Notinopasiphae Engel, new subgenus of Euryglossidia; Packercolletes Engel, new genus; Perditomorphina Engel, new subtribe; Phenacolletina Engel, new subtribe; Rhamphocolletes Engel, new genus; Ruzopria Engel, new subgenus of Belopria Moure; Sarocolletidion Engel, new genus; Spinolapina Engel, new subtribe; Sthenele Engel, new genus; Stilbopasiphae Engel, new genus; Stoclele Engel, new subgenus of Lamprocolletes; Torocolletina Engel, new subtribe; Walkerapis Engel, new genus; Zyzzocolletes Engel, new genus.

APA, Harvard, Vancouver, ISO, and other styles

7

Engel, Michael S. "Establishment of some clade names for Amphiesmenoptera (Insecta: Holometabola)." Novitates Paleoentomologicae, no. 24 (September 11, 2022): 1–7. http://dx.doi.org/10.17161/np.24.18498.

Full text

Abstract:

Classificatory notes are presented for various stem lineages relative to the Trichoptera+ Lepidoptera clade. The following new groups are established for clades above the family-group ranks: Protomeroptera Engel, Metamphiesmenoptera Engel, Cladochoroptera Engel, Euamphiesmenoptera Engel, Eocoronoptera Engel, Panendymenoptera Engel, Necrotrichoptera Engel, Endymenoptera Engel, Stelloptera Engel. Additionally, the new families Marimerobiidae Engel, new family, and Microptysmatellidae Engel, new family, are proposed along with Anecrotaulius Engel, new genus, and Paranecrotaulius Engel, new genus.

APA, Harvard, Vancouver, ISO, and other styles

8

Engel, Michael S. "Notes on South American stingless bees of the genus Scaptotrigona (Hymenoptera: Apidae), Part II: Subgroup A of the postica species group." Journal of Melittology, no. 110 (March 14, 2022): 1–51. http://dx.doi.org/10.17161/jom.i110.17001.

Full text

Abstract:

This is the second part of an intended four on various nomenclatural matters regarding South American species of the Neotropical stingless bee genus Scaptotrigona Moure (Apinae: Meliponini). Here, the postica species group is briefly outlined and organized into two informal subgroups, the first of which is treated herein. A key to these species is provided and the following new species established: Scaptotrigona ederi Engel, new species; S. gonzalezi Engel, new species; S. kuperi Engel, new species; S. extranea Engel, new species; S. rosellae Engel, new species; S. magdalenae Engel, new species; S. tatacoensis Engel, new species; S. macarenensis Engel, new species; S. caduceus Engel, new species; S. illescasi Engel, new species; S. baldwini Engel, new species; S. santiago Engel, new species; S. yungasensis Engel, new species; and S. faviziae Engel, new species. Lastly, a neotype is designated for S. ochrotricha (Buysson).

APA, Harvard, Vancouver, ISO, and other styles

9

Lobin, Henning. "Bemerkungen zur andauernden Aktualität des Werks von Ulrich Engel." Studia Germanica Gedanensia, no. 39 (December 20, 2018): 13–19. http://dx.doi.org/10.26881/sgg.2018.39.01.

Full text

Abstract:

Ulrich Engel hat mit seinen Publikationen zur deutschen Grammatik, zur Verbvalenz und zur kontrastiven Linguistik große Wirkung auf die internationale germanistische Linguistik ausgeübt. Weniger bekannt ist, dass er mit seinem Werk auch andere linguistische Teildisziplinen beeinflusst hat, die davon bis heute profitieren. Dependenzielle Ansätze spielen bei der maschinellen Syntaxanalyse mittlerweile eine zentrale Rolle, und bei der Entwicklung von Systemen zur maschinellen Übersetzung haben Engels Arbeiten ebenfalls ihre Spur hinterlassen. Der Aufbau von Sprachressourcen in Gestalt von „Baumbanken“ kann auf Engels Grammatikkonzeption zurückgreifen, und auch zur neuerlich florierenden Konstruktionsgrammatik bestehen klare Bezüge. Im Beitrag werden diese weniger bekannten Einwirkungen von Engels Werk in andere Bereiche dargestellt und in ihrer andauernden Aktualität gewürdigt.

APA, Harvard, Vancouver, ISO, and other styles

10

Engel, Michael S. "New species of the stingless bee genus Plebeia (Hymenoptera: Apidae)." Journal of Melittology, no. 114 (October 1, 2022): 1–28. http://dx.doi.org/10.17161/jom.i114.18568.

Full text

Abstract:

Nine new species of the stingless bee genus Plebeia Schwarz (Meliponini: Meliponina) are described and figured, all of the nominate subgenus. The new species are: Plebeia (Plebeia) amydra Engel, new species, from Venezuela; P. (P.) deceptrix Engel, new species, from Peru; P. (P.) hyperplastica Engel, new species, from Venezuela; P. (P.) mutisi Engel, new species, from Colombia; P. (P.) plectoforma Engel, new species, from Venezuela; P. (P.) roubiki Engel, new species, from Ecuador; P. (P.) silveirai Engel, new species, from Peru; P. (P.) tigris Engel, new species, from Ecuador; P. (P.) vidali Engel, new species, from Costa Rica.

APA, Harvard, Vancouver, ISO, and other styles

11

Abdollahi, Alireza, Nadir Trabelsi, and Amel Zitouni. "Groups with an Engel restriction on proper subgroups of infinite rank." Journal of Algebra and Its Applications 19, no. 11 (2019): 2050213. http://dx.doi.org/10.1142/s0219498820502138.

Full text

Abstract:

We prove that a locally graded group whose proper subgroups are Engel (respectively, [Formula: see text]-Engel) is either Engel (respectively, [Formula: see text]-Engel) or finite. We also prove that a group of infinite rank whose proper subgroups of infinite rank are Engel (respectively, [Formula: see text]-Engel) is itself Engel (respectively, [Formula: see text]-Engel), provided that [Formula: see text] belongs to the Černikov class [Formula: see text], which is the closure of the class of periodic locally graded groups by the closure operations Ṕ, P̀, R and L.

APA, Harvard, Vancouver, ISO, and other styles

12

Vennerød, Maria Tryti. "Fallen engel." Samtiden 119, no. 04 (2011): 106–15. http://dx.doi.org/10.18261/issn1890-0690-2010-04-10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Morris, Walter D., Liv Lundberg, and Johanne Marie Hansen-Krone. "Tveegget engel." World Literature Today 63, no. 1 (1989): 115. http://dx.doi.org/10.2307/40145169.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Schubert, Peter Z., Jáchym Topol, and Peter Sacher. "Engel Exit." World Literature Today 71, no. 4 (1997): 827. http://dx.doi.org/10.2307/40153430.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

MULLIN, RICK. "KLAUS ENGEL." Chemical & Engineering News 85, no. 11 (2007): 26. http://dx.doi.org/10.1021/cen-v085n011.p026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Engel, Michael. "Michael Engel." Current Biology 26, no. 20 (2016): R905—R907. http://dx.doi.org/10.1016/j.cub.2016.07.043.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Marks, David F. "Rebuilding Engel." Theory & Psychology 30, no. 4 (2019): 612–14. http://dx.doi.org/10.1177/0959354319884638.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Thiel, Markus. "Gefallene ENGEL." Opernwelt 64, no. 4 (2023): 20–21. http://dx.doi.org/10.5771/0030-3690-2023-4-020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

del Pino, Álvaro, and Thomas Vogel. "The Engel–Lutz twist and overtwisted Engel structures." Geometry & Topology 24, no. 5 (2020): 2471–546. http://dx.doi.org/10.2140/gt.2020.24.2471.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Engel, Michael S. "Notes on South American stingless bees of the genus Scaptotrigona (Hymenoptera: Apidae), Part III: A revised infrageneric classification and new species." Journal of Melittology, no. 111 (March 17, 2022): 1–29. http://dx.doi.org/10.17161/jom.i111.17013.

Full text

Abstract:

This is the third part of a series on various taxonomic matters regarding the Neotropical stingless bee genus Scaptotrigona Moure (Apinae: Meliponini). Here, an infrageneric classification is established, with Sakagamilla Moure resurrected for the tubiba group, while Scaptotrigona Moure, s.str., encompasses the postica group. A key to subgenera is presented and five new subgenera are established: Eoscaptotrigona Engel, new subgenus; Dasytrigona Engel, new subgenus; Gymnotrigona Engel, new subgenus; Baryorygma Engel, new subgenus; and Astegotrigona Engel, new subgenus. The former bipunctata species group is considered to embody two unrelated groups and species of the luteipennis group also belong among these. Six new species are described, two of which would have formerly been included in the bipunctata group, and the remainder belong to the depilis group: Scaptotrigona (Eoscaptotrigona) totobi Engel, new species, from Venezuela and Colombia; S. (Gymnotrigona) psile Engel, new species, from Venezuela; S. (Gymnotrigona) aurantipes Engel, new species, from Venezuela; S. (Gymnotrigona) nuda Engel, new species, from Bolivia; S. (Gymnotrigona) stipula Engel, new species, from Brazil; S. (Baryorygma) fimbriata Engel, new species, from Bolivia.

APA, Harvard, Vancouver, ISO, and other styles

21

Borzooei, R. A., E. Mohammadzadeh, and Violeta Fotea. "On Engel Fuzzy Subpolygroups." New Mathematics and Natural Computation 13, no. 02 (2017): 195–206. http://dx.doi.org/10.1142/s1793005717500089.

Full text

Abstract:

In this paper, by considering the notions of polygroup and Engel group, we introduce the concept of Engel fuzzy subpolygroups. In this regard, by a normal Engel fuzzy subpolygroup [Formula: see text] of [Formula: see text] and [Formula: see text], the fundamental relation on a given polygroup [Formula: see text], we construct an Engel fuzzy subgroup [Formula: see text]. We obtain a necessary and sufficient condition between Engel fuzzy subpolygroups and the Engel group [Formula: see text]/[Formula: see text], the group of equivalence classes derived from a fuzzy subpolygroup of [Formula: see text]. Finally, by using these results, we get Zorn’s lemma, in the Engel fuzzy subpolygroups.

APA, Harvard, Vancouver, ISO, and other styles

22

Engel, Michael S. "A key to the species of Nanoplebeia, with descriptions of four new species (Hymenoptera: Apidae)." Journal of Melittology, no. 106 (August 27, 2021): 1–14. http://dx.doi.org/10.17161/jom.i106.15735.

Full text

Abstract:

Four new species of the subgenus Nanoplebeia Engel (genus Plebeia Schwarz) are described and figured as: Plebeia (Nanoplebeia) pleres Engel, new species, from Venezuela; P. (N.) asthenes Engel, new species, from Bolivia; P. (N.) orphne Engel, new species, from Ecuador and Peru; and P. (N.) chondra Engel, new species, from Ecuador. A key is presented to the species of the subgenus.

APA, Harvard, Vancouver, ISO, and other styles

23

Dolbak, L. V. "The Engel Length of the Product of Engel Elements." Siberian Mathematical Journal 47, no. 1 (2006): 55–57. http://dx.doi.org/10.1007/s11202-006-0006-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Engel, Michael S. "Replacement names for bees in the tribe Megachilini (Hymenoptera: Megachilidae)." Journal of Melittology, no. 70 (June 29, 2017): 1–5. http://dx.doi.org/10.17161/jom.v0i70.6558.

Full text

Abstract:

Eight instances of homonymy are identified in the megachiline genera Coelioxys Latreille and Megachile Latreille, with replacement names established for the junior homonyms. Coelioxys (Coelioxys) lethosyne Engel, new name, is proposed for C. simplex latefasciata Friese (nec Morawitz); C. (Liothyrapis) wuae Engel, new name, is proposed for C. albofasciata Wu (nec Radoszkowski); Megachile (Eutricharaea) hisarica Engel, new name, is proposed for M. dentata Rahman & Chopra (nec Friese); M. (Megachile) agnosta Engel, new name, is proposed for M. japonica Matsumura (nec Alfken); M. (Dasymegachile) schwimmeri Engel, new name, is proposed for M. mitchelli Raw (nec Gupta); M. (Creightonella) taftanica Engel, new name, is proposed for M. aurantiaca Rebmann (nec Friese); M. (Callomegachile) biseta austrina Engel, new name, is proposed for M. biseta australis Pasteels (nec Lucas); and M. (C.) ceratops Engel, new name, is proposed for M. monoceros Friese (nec Pallas).

APA, Harvard, Vancouver, ISO, and other styles

25

MOHAMMADZADEH, ELAHE, and RAJAB ALI BORZOOEI. "Results on (Engel, Solvable, Nilpotent) Fuzzy Subpolygroups." Kragujevac Journal of Mathematics 45, no. 5 (2021): 667–84. http://dx.doi.org/10.46793/kgjmat2105.667m.

Full text

Abstract:

In this paper, ﬁrst we deﬁne the notion of an Engel polygroup, to get further properties on Engel fuzzy subpolygroups. Moreover, we prove that every normal fuzzy subpolygroup of an Engel polygroup is Engel. Furthermore, we introduce the notions of solvable and nilpotent fuzzy subpolygroups and we get some of their properties. Finally we investigate the relations among solvable and nilpotent fuzzy subpolygroups with Engel fuzzy subpolygroups.

APA, Harvard, Vancouver, ISO, and other styles

26

Engel, John J. "Studies on Lophocoleaceae XXII. New Taxa and Combinations in New Zealand Heteroscyphus Schiffn." Polish Botanical Journal 58, no. 1 (2013): 95–106. http://dx.doi.org/10.2478/pbj-2013-0011.

Full text

Abstract:

AbstractHeteroscyphus dentammophilus J. J. Engel & Merrill, Heteroscyphus parallelifolius J. J. Engel, and Heteroscyphus stoloniferus J. J. Engel are new species, and Lophocolea helmsiana var. subparallela E. A. Hodgs. is a new synonym of H. parallelifolius. Heteroscyphus circumdentatus var. clasmatocoleoides J. J. Engel & Merrill is a new variety, and Heteroscyphus menziesii (Mitt.) J. J. Engel is a new combination. All taxa are from New Zealand.

APA, Harvard, Vancouver, ISO, and other styles

27

Engel, Barbara, C. "Stem cell directed gene therapy." Frontiers in Bioscience 4, no. 1-3 (1999): e26. http://dx.doi.org/10.2741/engel.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Jabara, Enrico, та Gunnar Traustason. "On (𝑛 + ½)-Engel groups". Journal of Group Theory 23, № 3 (2020): 503–11. http://dx.doi.org/10.1515/jgth-2019-0105.

Full text

Abstract:

AbstractLet n be a positive integer. We say that a group G is an {(n+\frac{1}{2})}-Engel group if it satisfies the law {[x,{}_{n}y,x]=1}. The variety of {(n+\frac{1}{2})}-Engel groups lies between the varieties of n-Engel groups and {(n+1)}-Engel groups. In this paper, we study these groups, and in particular, we prove that all {(4+\frac{1}{2})}-Engel {\{2,3\}}-groups are locally nilpotent. We also show that if G is a {(4+\frac{1}{2})}-Engel p-group, where {p\geq 5} is a prime, then {G^{p}} is locally nilpotent.

APA, Harvard, Vancouver, ISO, and other styles

29

Engel, Michael S. "A correction on the taxonomic identity of Succinapis (Hymenoptera: Apidae)." Entomologist's Monthly Magazine 161, no. 1 (2025): 40–44. https://doi.org/10.31184/m00138908.1611.4289.

Full text

Abstract:

The purpose of this note is to correct a nomenclatural oversight pertaining to two genus-group names among melikertine bees, a lineage known only from the Eocene of Eurasia (Engel 2001; Engel & Davis 2021; Engel & Xie 2024). In so doing, a new name is required for Succinapis micheneri Engel and S. goeleti Engel, and this group is described to rectify the matter. In addition, the key to genera of Melikertini is reproduced with the corrected names integrated into their proper places.

APA, Harvard, Vancouver, ISO, and other styles

30

Gupta, N. D., and M. F. Newman. "Third Engel groups." Bulletin of the Australian Mathematical Society 40, no. 2 (1989): 215–30. http://dx.doi.org/10.1017/s0004972700004329.

Full text

Abstract:

We present some new results on third Engel groups which are motivated by computer calculations but are not dependent on them. They include:• for n > 2 every n-generator third Engel group is nilpotent of class at most 2n – 1;• the fifth term of the lower central series of a third Engel group has exponent dividing 20;• the subgroup generated by fifth powers of elements in a third Engel group is nearly centre-by-metabeliami;and a normal form theorem for freest third Engel groups without elements of order 2.

APA, Harvard, Vancouver, ISO, and other styles

31

TRAUSTASON, GUNNAR. "TWO GENERATOR 4-ENGEL GROUPS." International Journal of Algebra and Computation 15, no. 02 (2005): 309–16. http://dx.doi.org/10.1142/s0218196705002189.

Full text

Abstract:

Using known results on 4-Engel groups one can see that a 4-Engel group is locally nilpotent if and only if all its 3-generator subgroups are nilpotent. As a step towards settling the question whether all 4-Engel groups are locally nilpotent we show that all 2-generator 4-Engel groups are nilpotent.

APA, Harvard, Vancouver, ISO, and other styles

32

Engel, Michael S. "New species of the augochlorine bee genus Stilbochlora, with a preliminary key (Hymenoptera: Halictidae)." Journal of Melittology, no. 89 (September 5, 2019): 1–15. http://dx.doi.org/10.17161/jom.v0i89.11734.

Full text

Abstract:

Three new species of the augochlorine bee genus Stilbochlora Engel et al. (Halictinae: Augochlorini) are described and figured from Peru. The new species are distinct from the type species, Stilbochlora eickworti (Engel et al.), in the more densely and extensively striate propodea, and can be distinguished from each other on the basis of propodeal sculpturing and coloration. The new taxa are: S. graceae Engel, new species; S. kateae Engel, new species; and S. wedmanorum Engel, new species. A key is provided to the species of Stilbochlora.

APA, Harvard, Vancouver, ISO, and other styles

33

Engel, Michael S., Hollister Herhold, Steven Davis, Bo Wang, and Jennifer Thomas. "Stingless bees in Miocene amber of southeastern China (Hymenoptera: Apidae)." Journal of Melittology, no. 105 (August 26, 2021): 1–83. http://dx.doi.org/10.17161/jom.i105.15734.

Full text

Abstract:

Among the many inclusions from the exceptionally rich fossiliferous amber of Zhangpu, China (Middle Miocene: Langhian), stingless bees (Apinae: Meliponini) are particularly common, analogous to the merely slightly older amber sites of Mexico and the Dominican Republic. While there is a large number of workers in Zhangpu amber, only two species are represented. The systematics and morphology of the tribe Meliponini is outlined, including a revision to terms of orientation and direction when discussing surfaces and features of appendages, all in order to better discuss the traits of the fossils as well as place them into a broader context in the global systematics of stingless bees. The two amber species are representative of two Old World genera of Meliponini: Tetragonula Moure and Austroplebeia Moure. While the former is widespread across southern Asia, Malesia, Papuasia, and Australia, the latter is today known only from New Guinea and Australia. Neither genus occurs in the environs of Zhangpu today. Tetragonula (Tetragonula) florilega Engel, new species, is a generally typical species of the subgenus although it intermingles traits otherwise found in two large species groups of non-Australian Tetragonula s.str. The species of Austroplebeia from Zhangpu is sufficiently distinct to place in a new subgenus, Anteplebeina Engel. Austroplebeia (Anteplebeina) fujianica Engel, new species, shares a long list of character states with Austroplebeia s.str., including the presence of yellow maculation on the face, mesoscutum, mesoscutellum, and metepisternum, found only in this clade among Asiatic Meliponini. Nonetheless, the species differs in the length of the malar space and various features of wing venation. Keys are provided to the genera in Zhangpu amber and the subgenera of both genera. The diversity of stingless bees in amber is discussed, as well as the presence of these two fossils in the Middle Miocene of mainland Asia in relation to prior divergence time estimates, phylogenetic relationships, as well as the paleogeography of the region and potential biogeographic hypotheses. The biological association of stingless bees with resins, particularly the collection of dipterocarp resins, is discussed as Zhangpu amber is a Class II resin likely produced by an extinct species of Dipterocarpaceae (Malvales). Also discussed are the ecological preferences of modern Tetragonula and Austroplebeia relative to the reconstructed paleoenvironment of the Zhangpu amber rainforest. Emendations to the classification of Meliponini are appended, with the following new taxa proposed: Atrichotrigona Engel, new subgenus of Axestotrigona Moure; Lispotrigona V.H. Gonzalez & Engel, new subgenus of Nannotrigona Cockerell; Asperplebeia Engel, new genus; Nanoplebeia Engel, new subgenus of Plebeia Schwarz; Aphaneuropsis Engel, Koilotrigona Engel, Necrotrigona Engel, Dichrotrigona Engel, Nostotrigona Engel, Ktinotrofia Engel, all new subgenera of Trigona Jurine; Chapadapis Engel, new subgenus of Schwarziana Moure. The following higher groups are also established: Hypotrigonina Engel, new sutribe; Heterotrigonitae Engel, new infratribe; Trigoniscitae Engel, new infratribe.

APA, Harvard, Vancouver, ISO, and other styles

34

Engel, Michael S. "Revision of the cleptoparasitic bee genus Cleptommation (Hymenoptera: Halictidae)." Journal of Melittology, no. 22 (November 4, 2013): 1. http://dx.doi.org/10.17161/jom.v0i22.4608.

Full text

Abstract:

The cleptoparasitic bee genus Cleptommation Engel, Brooks, & Yanega, new status (Halictinae: Augochlorini), is revised. In addition to the type species, Cleptommation minutum (Friese), new combination, the following new species are recognized: C. bulivyense Engel, new species, C. tupaqi Engel, new species, and C. chibchani Engel, new species. A lectotype is designated for C. minutum and a key to the species is provided.

APA, Harvard, Vancouver, ISO, and other styles

35

Engel, Pascal. "Pascal Engel. Publications." Philosophia Scientae, no. 21-3 (October 30, 2017): 209–34. http://dx.doi.org/10.4000/philosophiascientiae.1311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Albrecht, Uwe. "Engel im Untergrund." Schwäbische Heimat 57, no. 4 (2022): 423–27. http://dx.doi.org/10.53458/sh.v57i4.4031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Stern, Cornelia. "Pflanze der Engel." Heilpflanzen 02, no. 03 (2022): 13. http://dx.doi.org/10.1055/a-1731-5368.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Philipp, Sabine. "Engel angeln elektronisch." VDI nachrichten 75, no. 39 (2021): 19. http://dx.doi.org/10.51202/0042-1758-2021-39-19.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Glade, Henry, and Heinrich Böll. "Der Engel schwieg." World Literature Today 68, no. 1 (1994): 113. http://dx.doi.org/10.2307/40149913.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Seedorf, Thomas. "WENN ENGEL SINGEN." Opernwelt 66, no. 1 (2025): 24. https://doi.org/10.5771/0030-3690-2025-1-024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Casals, Roger, Álvaro del Pino, and Francisco Presas. "Loose Engel structures." Compositio Mathematica 156, no. 2 (2020): 412–34. http://dx.doi.org/10.1112/s0010437x19007759.

Full text

Abstract:

This paper contributes to the study of Engel structures and their classification. The main result introduces the notion of a loose family of Engel structures and shows that two such families are Engel homotopic if and only if they are formally homotopic. This implies a complete $h$-principle when auxiliary data is fixed. As a corollary, we show that Lorentz and orientable Cartan prolongations are classified up to homotopy by their formal data.

APA, Harvard, Vancouver, ISO, and other styles

42

Engel, David. "Professor Engel Replies." Slavic Review 50, no. 3 (1991): 739. http://dx.doi.org/10.1017/s003767790011592x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Juhász, Arye. "Engel groups I." Israel Journal of Mathematics 69, no. 1 (1990): 1–24. http://dx.doi.org/10.1007/bf02764726.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Collins, Donald J., and Arye Juhász. "Engel groups II." Israel Journal of Mathematics 174, no. 1 (2009): 47–71. http://dx.doi.org/10.1007/s11856-009-0103-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Collins, Donald J., and Arye Juhász. "Engel groups III." Israel Journal of Mathematics 174, no. 1 (2009): 73–91. http://dx.doi.org/10.1007/s11856-009-0104-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Gerharz, Elmar W. "Schau heimwärts, Engel ..." Uro-News 22, no. 9 (2018): 66. http://dx.doi.org/10.1007/s00092-018-1976-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Fiscella, Kevin. "George Engel storytelling." Families, Systems, & Health 23, no. 4 (2005): 410–12. http://dx.doi.org/10.1037/1091-7527.23.4.410.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Chai, Andreas, and Alessio Moneta. "Retrospectives: Engel Curves." Journal of Economic Perspectives 24, no. 1 (2010): 225–40. http://dx.doi.org/10.1257/jep.24.1.225.

Full text

Abstract:

Engel curves describe how household expenditure on particular goods or services depends on household income. German statistician Ernst Engel (1821–1896) was the first to investigate this relationship systematically in an article published about 150 years ago. The best-known single result from the article is “Engel's law,” which states that the poorer a family is, the larger the budget share it spends on nourishment. We revisit Engel's article, including its context and the mechanics of the argument. Because the article was completed a few decades before linear regression techniques were established and income effects were incorporated into standard consumer theory, Engel was forced to develop his own approach to analyzing household expenditure patterns. We find his work contains some interesting features in juxtaposition to both the modern and classical literature. For example, Engel's way of estimating the expenditure–income relationship resembles a data-fitting technique called the “regressogram” that is nonparametric—in that no functional form is specified before the estimation. Moreover, Engel introduced a way of categorizing household expenditures in which expenditures on commodities that served the same purpose by satisfying the same underlying “want” were grouped together. This procedure enabled Engel to discuss the welfare implications of his results in terms of the Smithian notion that individual welfare is related to the satisfaction of wants. At the same time, he avoided making a priori assumptions about which specific goods were necessities, assumptions which were made by many classical economists like Adam Smith. Finally, we offer a few thoughts about some modern literature that builds on Engel's research.

APA, Harvard, Vancouver, ISO, and other styles

49

Donahue, Neil H., та Kathrin Schmidt. "Fluβbild mit Engel". World Literature Today 70, № 2 (1996): 396. http://dx.doi.org/10.2307/40152140.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

TRAUSTASON, GUNNAR. "ENGEL LIE-ALGEBRAS." Quarterly Journal of Mathematics 44, no. 3 (1993): 355–84. http://dx.doi.org/10.1093/qmath/44.3.355.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!