7,048 research outputs found
Biography of Ceerno Ndiaye Ba
No full textThis manuscript is a biography of Ceerno Ndiaye Ba Bababe, in Mauritania. It is one of a series of biographies that the author has written about Islamic leaders in West Africa.Ce manuscrit est une biographie de Ceerno Ndiaye Ba Bababe, en Mauritanie. Elle fait partie d'une série de biographies que l'auteur a écrites sur les dirigeants islamiques en Afrique de l'Ouest
Poems of Sheikh Muhammad al-Ghaly Ba
No full textThis volume contains seven poems handwritten by Muhammad al-Ghāli Ba. According to the author's son, Mountaga Ba, the poems were probably composed in the mid-1970s a time when the author lived in Mauritania, while working at the country's national radio station and serving as a special counsel to then president Moktar Ould Daddah (1924–2003). The poems adress various issues. The first is a call to action addressed to the Mauritianian youth, urging them to join in the collective work for the development of the country. The second poem is a hagiography on Ceerno Ahmad Nene Ba of Kaedi (Mauritania). The poem eulogizes the virtues of the patron. The third describes the event of Sharif Muhammad al-Habib's visit to the region of Fuuta region (Senegal), namely the village of Pate Galo. The fourth poem contains greetings and expresions of love addressed to the author's friends in the town of Kaedi. The fifth poem is a remembrance about good times. The author reminisces and praises the qualities of a woman named Jaari.The sixth poem describes one afternoon journey of the author. The seventh poem is a mournful praisesong in which the author laments the loss of a cherished person.Ce volume contient sept poèmes manuscrits de Muhammad al-Ghāli Ba. Selon le fils de l'auteur, Mountaga Ba, les poèmes ont probablement été composés au milieu des années 1970, à une époque où l'auteur vivait en Mauritanie, alors qu'il travaillait à la radio nationale du pays et était conseiller spécial du président de l'époque, Moktar Ould Daddah (1924). –2003). Les poèmes abordent diverses questions. Le premier est un appel à l'action adressé aux jeunes mauriciens, les exhortant à s'associer au travail collectif pour le développement du pays. Le deuxième poème est une hagiographie sur Ceerno Ahmad Nene Ba de Kaedi (Mauritanie). Le poème fait l'éloge des vertus du mécène. Le troisième décrit l'événement de la visite de Sharif Muhammad al-Habib dans la région de la région de Fuuta (Sénégal), à savoir le village de Pate Galo. Le quatrième poème contient des salutations et des expressions d'amour adressées aux amis de l'auteur dans la ville de Kaedi. Le cinquième poème est un souvenir des bons moments. L'auteur rappelle et loue les qualités d'une femme nommée Jaari. Le sixième poème décrit un après-midi de voyage de l'auteur. Le septième poème est une louange mélancolique dans laquelle l'auteur déplore la perte d'une personne chérie
Neoperla yao Stark 1987
No full textNeoperla yao Stark (Figs. 72‐74, 121‐123) Neoperla yao Stark, 1987:47. Holotype ♂ (B.P. Bishop Museum). 6 km S Dalat, Vietnam Material examined. Vietnam: Cao Bang, Ba Be National Park, between park gates and pond, UV light, 22 May 1995, D. Currie, J. Swann, M. McGuffin, ROM 956119, 1 ♂ (ROM). Gia Lai, An Khe District, Tram Lap, Azun River, 3 km NE on trail from forestry building, 21 June 1996, D. Currie, J. Swann, ROM 961076, 1 ♂ (ROM). Gia Lai, An Khe District, Tram Lap, near pond and coffee plantation, 14 June 1996, UV light, 14 ° 26’ N, 108 ° 33’ E, B. Hubley, D. Currie, J. Swann, ROM 961045, 1 ♂, 2 ♀ (ROM). Gia Lai, Buoenloy, April 1995, A. Gorohov, 1 ♂ (PMSL). Remarks. This species was previously known from three males. Two of these are from sites in southern Vietnam and the other in China. These additional males, from the southern region of Vietnam are in close agreement with the description in Stark (1987). Adult habitus. Biocellate. Head mostly yellow but with a dark spot over ocelli and a second small spot anteromesally on frons; spot over ocelli usually acute on anterior margin (Fig. 72). Pronotum pale brown, disc becoming paler near lateral margins; rugosities obscure. Wing membrane pale, veins pale amber, costal area pale. Femora yellow brown, tibiae slightly darker. Putative Female. Forewing length 12 mm. Subgenital plate a narrow tab, slightly expanded at apex and broadly U‐ shaped on posterior margin (Fig. 74). Vagina longer than wide and slightly constricted near midlength (Fig. 73). Spermathecal stalk short, spermatheca slender, twisted at midlength and slightly hooked at apex. Egg. Pear shaped. Length ca. 0.31 mm, width ca. 0.23 mm. Collar short with heavy meshwork of irregular shaped and pitted cells on sides; rim slightly flanged, margin irregularly scalloped; collar ca. 0.08 mm wide (Figs. 121‐123). Chorion appearing smooth but with small, shallow pits and obscure FCIs covering surface. Diagnosis. See above under N. mnong.Published as part of Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, pp. 19-54 in Illiesia 4 (3) on pages 41-42, DOI: 10.5281/zenodo.475885
Stark broadening of Ba I and Ba II spectral lines
No full textUsing a semiclassical
approach, we have
calculated electron-, pro ton-, and
ionized he li um- im pact line widths and shifts for 14 Ba I and
64 Ba II multiplets
for perturber densities 1015- 1018 cm-3
and temperatures K for Ba I and K for Ba II. The results have been
compared with available experimental and theoretical data
Neoperla yao Stark 1987
No full text<i>Neoperla yao</i> Stark <p>(Figs. 72‐74, 121‐123)</p> <p> <i>Neoperla yao</i> Stark, 1987:47. Holotype ♂ (B.P. Bishop Museum). 6 km S Dalat, Vietnam</p> <p> <b>Material examined.</b> Vietnam: Cao Bang, Ba Be National Park, between park gates and pond, UV light, 22 May 1995, D. Currie, J. Swann, M. McGuffin, ROM 956119, 1 ♂ (ROM). Gia Lai, An Khe District, Tram Lap, Azun River, 3 km NE on trail from forestry building, 21 June 1996, D. Currie, J. Swann, ROM 961076, 1 ♂ (ROM). Gia Lai, An Khe District, Tram Lap, near pond and coffee plantation, 14 June 1996, UV light, 14 <b>°</b> 26’ N, 108 <b>°</b> 33’ E, B. Hubley, D. Currie, J. Swann, ROM 961045, 1 ♂, 2 ♀ (ROM). Gia Lai, Buoenloy, April 1995, A. Gorohov, 1 ♂ (PMSL).</p> <p> <b>Remarks.</b> This species was previously known from three males. Two of these are from sites in southern Vietnam and the other in China. These additional males, from the southern region of Vietnam are in close agreement with the description in Stark (1987).</p> <p> <b>Adult habitus.</b> Biocellate. Head mostly yellow but with a dark spot over ocelli and a second small spot anteromesally on frons; spot over ocelli usually acute on anterior margin (Fig. 72). Pronotum pale brown, disc becoming paler near lateral margins; rugosities obscure. Wing membrane pale, veins pale amber, costal area pale. Femora yellow brown, tibiae slightly darker.</p> <p> <b>Putative Female.</b> Forewing length 12 mm. Subgenital plate a narrow tab, slightly expanded at apex and broadly U‐ shaped on posterior margin (Fig. 74). Vagina longer than wide and slightly constricted near midlength (Fig. 73). Spermathecal stalk short, spermatheca slender, twisted at midlength and slightly hooked at apex.</p> <p> <b>Egg.</b> Pear shaped. Length ca. 0.31 mm, width ca. 0.23 mm. Collar short with heavy meshwork of irregular shaped and pitted cells on sides; rim slightly flanged, margin irregularly scalloped; collar ca. 0.08 mm wide (Figs. 121‐123). Chorion appearing smooth but with small, shallow pits and obscure FCIs covering surface.</p> <p> <b>Diagnosis.</b> See above under <i>N. mnong</i>.</p>Published as part of <i>Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, pp. 19-54 in Illiesia 4 (3)</i> on pages 41-42, DOI: <a href="http://zenodo.org/record/4758856">10.5281/zenodo.4758856</a>
On the Stark broadening of Sr
No full textWe report results of the Stark broadening calculations for Sr+ and
Ba+ resonance lines in ultracold plasmas using semiempirical formulas
and numerical computer simulation technique. The simulation results show
that strong collisions dominate Stark broadening at very low electron
temperatures and weak collision approximation used recently by Vrinceanu
et al. cannot be applied in this temperature region. Consequently, the
temperature trend of Stark widths and shifts changes from
successfully used at elevated temperatures to an increasing trend
with temperature, which is characteristic for strong collisions at
low temperature
Longitudinal analysis of serum neutralization of SARS-CoV-2 Omicron BA.2, BA.4, and BA.5 in patients receiving monoclonal antibodies
No full textThe emergence of Omicron sublineages impacts the therapeutic efficacy of anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) monoclonal antibodies (mAbs). Here, we evaluate neutralization and antibody-dependent cellular cytotoxicity (ADCC) activities of 6 therapeutic mAbs against Delta, BA.2, BA.4, and BA.5. The Omicron subvariants escape most antibodies but remain sensitive to bebtelovimab and cilgavimab. Consistent with their shared spike sequence, BA.4 and BA.5 display identical neutralization profiles. Sotrovimab is the most efficient at eliciting ADCC. We also analyze 121 sera from 40 immunocompromised individuals up to 6 months after infusion of Ronapreve (imdevimab + casirivimab) or Evusheld (cilgavimab + tixagevimab). Sera from Ronapreve-treated individuals do not neutralize Omicron subvariants. Evusheld-treated individuals neutralize BA.2 and BA.5, but titers are reduced. A longitudinal evaluation of sera from Evusheld-treated patients reveals a slow decay of mAb levels and neutralization, which is faster against BA.5. Our data shed light on antiviral activities of therapeutic mAbs and the duration of effectiveness of Evusheld pre-exposure prophylaxis
Neoperla hubleyi Stark & Sivec 2008, sp. n.
No full textNeoperla hubleyi sp. n. (Figs. 29‐33, 97‐99) Material examined. Holotype ♂ from Vietnam, Cao Bang, Ba Be National Park, near dorm annex, UV light, 17 May 1995, D. Currie, J. Swann, J. Whiting, ROM 956058, (ROM). Paratypes: Vietnam, Cao Bang, Ba Be National Park, between gates and dorm, UV light, 22 May 1995, D. Currie, J. Swann, M. McGuffin, ROM 956119, 1 ♂ (ROM). Vietnam, Nghe An, ca. 25 km SW Con Cuong, Khe Moi Forestry Camp, 18 ° 45’ N, 104 ° 49’ E, 3 June 1995, B. Hubley, J. Swann, ROM 956150, 1 ♂ (ROM). Vietnam, Thua Thien‐ Hue, Bach Ma National Park near junction Rhododendron and Five Lakes Trails, 16 ° 11’ N, 107 ° 51’ E, 16 June 2000, B. Hubley, D.C. Darling, ROM 2000531, 1 ♂ pinned (IEBR), 1 ♀ (ROM). Vietnam, Vinh Phu, Tam Dao Hill Station, 3‐31 May 1996, B. Hubley, D.C. Darling, M. Hanson, ROM 961002, 1 ♂ pinned (ROM). Same site, 11‐13 October 1994, D. Currie, UV light, ROM 946002, 1 ♀ (ROM). Vietnam, Vinh Phu, Tam Dao, lower waterfall on stream flowing through town, 11 May 1996, B. Hubley, D.C. Darling, ROM 961030, 1 ♂ pinned (ROM). Adult habitus. Biocellate. Head with a small dark spot, pointed medially, over ocelli. Pronotum pale brown with obscure, slightly darker rugosities; anterior and posterior margins and median suture dark brown (Fig. 29). Wing membrane pale amber, veins darker. Femora yellow but slightly darker dorsoapically. Male. Forewing length 10.5‐11.5 mm. Tergum 9 process a rounded plateau, concave on posterior margin and sprinkled with small sensilla basiconica over entire process. Process of tergum 8 tongue shaped, erect and armed on anterodorsal margin with small spines. Tergum 9 without sensilla patches (Fig. 30). Hemitergal processes short and slightly curved. Aedeagal tube long, slender, lightly sclerotized on ventral margin and bearing in apical third a slender, bifurcate lobe; arms of lobe about half as long as stalk and armed on tips with a few (ca. 4‐5) small spines; ventral margin of tube distal to lobe covered with rows of fine spicules (Fig. 31). Aedeagal sac about as long as tube and curved strongly ventrad; small area on apex armed with a patch of slightly larger, red‐ brown erect spines but most of sac covered with small flattened scale‐ like spines; dorsal margin unarmed for most of sac length but ventral margin armed for at least half the sac length; a basolateral lobe of scale armature extends nearly to base of sac (Fig. 31). Putative Female. Forewing length 12‐13 mm. Subgenital plate slightly produced and notched. Vagina elongate‐ oval, lined along lateral margins with sparse patches of pale brown spinules, and lined more densely around base of spermathecal stalk (Fig.32). Spermathecal stalk slender, unlined and supporting a recurved, sausage shaped spermatheca with hooked apex (Fig. 33). Egg. Barrel shaped. Length ca. 0.33 mm, width ca. 0.18 mm. Collar not distinctly stalked, width ca. 0.1 mm at rim. Rim smooth, primary striae join rim on sides of collar (Figs. 97‐99). Primary striae smooth and widely spaced, ca. 10 visible in lateral aspect; a pair of secondary striae present between each pair of primaries; secondary striae thick near middle of egg but strongly tapered and inconspicuous toward each end. Sulci with three rows of punctations. Lid covered with prominent, thick walled, follicle cell impressions; floors of FCIs punctate. Larva. Unknown. Etymology. The patronym honors Brad Hubley of the Royal Ontario Museum in recognition of his efforts in collecting this material and in making it available to us for our study. Diagnosis. This species is a member of the N. diehli Sivec species complex and is quite similar to N. han Stark, a species described from Hong Kong (Stark 1987) and subsequently reported from Guizhou Province (Yang & Yang 1993b). The two species can be distinguished by comparing details of the aedeagal sac armature. In N. han, the entire sac surface is covered with scale‐ like spines from the tip to near the base, and the largest spines occur basolaterally, whereas in N. hubleyi most of the dorsal sac margin is unarmed and the scale spines are uniform in size throughout most of the patch with only the apical area having larger spines. The female association is based on co‐ occurrence at two sites (Bach Ma National Park and Tam Dao Hill Station) for a pair of somewhat teneral females with ocellar patches similar to those of male specimens.Published as part of Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, pp. 19-54 in Illiesia 4 (3) on pages 30-31, DOI: 10.5281/zenodo.475885
Cerconychia sapa Stark & Sivec 2007, sp.n.
No full textCerconychia sapa, sp.n. (Figs. 1 ‐ 9) Material examined. Holotype ♂ and 15 ♂, 28 ♀ paratypes from Vietnam, Loa Cai, Sapa, large waterfall on road from Sapa to Lai Chau, UV light, 8 May 1995, D. Currie, B. Hubley, J. Swann (Royal Ontario Museum 956022), Holotype (ROM), paratypes (BPS, IEBR, PMSL, USNM). Additional paratypes: Vietnam, Loa Cai, ca. 12 km along road from Sapa to Lai Chau, 1950 m, 22° 20 ʹ 58.3 ʺ N, 103° 46 ʹ 15.7 ʺ E, Malaise trap, B. Hubley, 1 ♂ (ROM 992002), (ROM). Vietnam, Cao Bang, Ba Be National Park, jct. road to Ba Be, 19 May 1995, D. Currie, K. Ciruna, J. Whiting, 2 ♂, 2 ♀ (ROM 956101), (ROM). Vietnam, Sapa, Fan Si Pang Mt., 1600 m, 22 ‐ 29 April 1995, light trap, 2 ♂, 3 ♀ (MNB). Adult habitus. Biocellate. General color pale yellow brown. Head pale over much of occiput but dusky brown behind eyes and along stem of epicranial suture in fully pigmented individuals; stem and Y arms of suture dark brown, frons mostly dark brown (Fig. 1). Pronotum dark brown on anterior and posterior margins of disc; disc pale except for dark rugosities which form an irregular mid lateral band (Fig. 1). Legs brown, without banding. Wings transparent, veins brown. Male. Forewing length 12 ‐ 17 mm. Basal cercal segment swollen in dorsal aspect, terminating in a long, curved, acute process which projects along inner cercal margin (Figs. 2, 6, 7); basal segment and process armed asymmetrically along length with numerous (ca. 15 or more) small spines or enlarged sensilla (Figs. 6 ‐ 7); second and sometimes third segment armed with an enlarged dorsal spine (Figs. 6 ‐ 9). Ninth sternum bearing a thick, wide setal brush near anterior margin (Figs. 3 ‐ 4). Female. Forewing length 20 ‐ 22 mm. Subgenital plate very slightly produced into a short tab with mesal emargination (Fig. 5). Sternum 9 sparsely setose over central area but with a patch of coarse short setae associated with basomesal fold posterior to gonopore. Intersegmental membrane between sterna 9 and 10 with microtrichia. Vagina a membranous sac, wide at base, narrowly rounded at tip, and lightly coated with pale brown spinulae in the wrinkled chamber. Spermatheca long, slender and bearing several slender accessory glands. Egg. Typical of genus. Ovoid with collar absent and chorion smooth. Nymph. Unknown. Etymology. The species name, used as a noun in apposition, is based on the type locality near Sapa. Diagnosis. Males of this species are distinct from all known Styloperlidae by virtue of the numerous small spines scattered over the dorsum and margin of the basal cercal segment and process. Females have a slightly produced, emarginate subgenital plate similar to that of other Cerconychia (Uchida & Isobe 1989), but the forewing length is greater than the 9 ‐ 16 mm composite range given for the Taiwanese species. Cerconychia brunnea Klapálek and C. livida Klapálek are known from Taiwan (Uchida & Isobe 1989) and C. sinensis Yang & Yang is known from Hainan (Yang & Yang 1995), thus C. sapa is the first mainland Cerconychia species. The following provisional key, modified from Uchida & Isobe (1989), is offered as an aid for identification of Cerconychia males.Published as part of Stark, Bill P. & Sivec, Ignac, 2007, A Synopsis Of Styloperlidae (Insecta, Plecoptera) With Description Of Cerconychia Sapa, A New Stonefly From Vietnam, pp. 10-16 in Illiesia 3 (2) on page 11, DOI: 10.5281/zenodo.475863
Boundary Algebra: A Simpler Approach to Boolean Algebra and the Sentential Connectives
No full textBoundary algebra [BA] is a algebra of type , and a simplified notation for Spencer-Brown’s (1969) primary algebra. The syntax of the primary arithmetic [PA] consists of two atoms, () and the blank page, concatenation, and enclosure between ‘(‘ and ‘)’, denoting the primitive notion of distinction. Inserting letters denoting, indifferently, the presence or absence of () into a PA formula yields a BA formula. The BA axioms are A1: ()()= (), and A2: “(()) [abbreviated ‘⊥’] may be written or erased at will,” implying (⊥)=(). The repeated application of A1 and A2 simplifies any PA formula to either () or ⊥. The basis for BA is B1: abc=bca (concatenation commutes & associates); B2, ⊥a=a (BA has a lower bound, ⊥); B3, (a)a=() (BA is a complemented lattice); and B4, (ba)a=(b)a (implies that BA is a distributive lattice). BA has two intended models: (1) the Boolean algebra 2 with base set B={(),⊥}, such that () ⇔ 1 [dually 0], (a) ⇔ a′, and ab ⇔ a∪b [a∩b]; and (2) sentential logic, such that () ⇔ true [false], (a) ⇔ ~a, and ab ⇔ a∨b [a∧b]. BA is a self-dual notation, facilitates a calculational style of proof, and simplifies clausal reasoning and Quine’s truth value analysis. BA resembles C.S. Peirce’s graphical logic, the symbolic logics of Leibniz and W.E. Johnson, the 2 notation of Byrne (1946), and the Boolean term schemata of Quine (1982).Boundary algebra; boundary logic; primary algebra; primary arithmetic; Boolean algebra; calculation proof; G. Spencer-Brown; C.S. Peirce; existential graphs
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