6,343 research outputs found
Two new eriophyoid mites (Acari: Eriophyoidea) from West Bengal, India
No full textSur, Surajit, Roy, Sourav, Chakrabarti, Samiran (2018): Two new eriophyoid mites (Acari: Eriophyoidea) from West Bengal, India. Zootaxa 4434 (1): 193-200, DOI: 10.11646/zootaxa.4434.1.1
FIGURE 25–28. Spinaephyes alnus n in Two new genera and two new species of eriophyoid mites (Acari: Eriophyoidea) from North Bengal, India
No full textFIGURE 25–28. Spinaephyes alnus n. sp., female: 25. Prodorsal shield with apical papilla; 26. Lobes with spines; 27. Coxal– genital region. Male: 28. Genitalia.Published as part of Chakrabarti, Samiran, Sur, Surajit, Roy, Sourav & Sarkar, Sanjay, 2017, Two new genera and two new species of eriophyoid mites (Acari: Eriophyoidea) from North Bengal, India, pp. 172-182 in Zootaxa 4236 (1) on page 179, DOI: 10.11646/zootaxa.4236.1.10, http://zenodo.org/record/32198
FIGURE 2. Abacarus sundarbanensis n in Two new eriophyoid mites (Acari: Eriophyoidea) from West Bengal, India
No full textFIGURE 2. Abacarus sundarbanensis n. sp.: Female:—a—Prodorsal shield with scapular setae; b—Coxal-genital region; c— ventral annuli with rounded microtubercles; d—Dorsal annuli with ridges and troughs.Published as part of Sur, Surajit, Roy, Sourav & Chakrabarti, Samiran, 2018, Two new eriophyoid mites (Acari: Eriophyoidea) from West Bengal, India, pp. 193-200 in Zootaxa 4434 (1) on page 196, DOI: 10.11646/zootaxa.4434.1.13, http://zenodo.org/record/129092
Cosmic reionization after Planck II: contribution from quasars
No full textIn the light of the recent Planck downward revision of the electron scattering optical depth, and of the discovery of a faint active galactic nuclei (AGN) population at z > 4, we reassess the actual contribution of quasars to cosmic reionization. To this aim, we extend our previous Markov Chain Monte Carlo based data-constrained semi-analytic reionization model and study the role of quasars on global reionization history. We find that the quasars can alone reionize the Universe only for models with very high AGN emissivities at high redshift. These models are still allowed by the recent cosmic microwave background data and most of the observations related to HI reionization. However, they predict an extended and early He II reionization ending at z ≳ 4 and a much slower evolution in the mean He II Ly-α forest opacity than what the actual observation suggests. Thus, when we further constrain our model against the He II Ly-α forest data, this AGN-dominated scenario is found to be clearly ruled out at 2σ limits. The data seems to favour a standard two-component picture where quasar contributions become negligible at z ≳ 6 and a non-zero escape fraction of ~10 per cent is needed from early-epoch galaxies. For such models, mean neutral hydrogen fraction decreases to ~10-4 at z = 6.2 from ~0.8 at z = 10.0 and helium becomes doubly ionized at much later time, z ~ 3. We find that these models are as well in good agreement with the observed thermal evolution of IGM as opposed to models with very high AGN emissivities
Approaching through the chronicles of species with low-valent silicon and their transition metal complexes: Structure, bonding and potential catalytic applications
No full textMononuclear and dinuclear tetravalent zirconium compounds as catalysts for the synthesis of aliphatic polyesters and aliphatic polycarbonates
No full texthttp://dx.doi.org/10.13039/501100001409 Department of Science and Technology, Ministry of Science and Technology, Indiahttp://dx.doi.org/10.13039/501100001843 Science and Engineering Research Boar
United They Fall: Why the International Community Should Not Promote Military Integration after Civil War
No full textThe single strongest predictor of civil war is a nation having had one in the past, and preventing the recurrence of civil war has thus become the critical problem for both scholarship and policy. The conventional wisdom urges the creation of capable, legitimate, and inclusive postwar states to reduce the risk of relapse into civil war, and international peacebuilders have often encouraged the formation of a new national army including members of the war’s opposing sides. However, military integration has received little theoretical or empirical attention. Filling that gap, we argue that both the theoretical logics and the empirical record identifying military integration as a significant contributor to durable post-civil war peace are weak. Our analysis of eleven cases finds little evidence that military integration played a substantial causal role in preventing the return to civil war and little support for the likely causal mechanisms. Military integration does not usually send a costly signal of the parties’ commitment to peace, provide communal security, employ many possible spoilers, or act as a powerful symbol of a unified nation. We conclude that it is both unwise and unethical for the international community to press military integration on reluctant local forces.Based in part on a larger collective project: Roy Licklider (Ed.). (2014). New Armies from Old: Merging Competing Military Forces after Civil Wars. Washington, D.C.: Georgetown University Press; see http://press.georgetown.edu/book/georgetown/new-armies-old
Spinaephyes Chakrabarti, Sur, Roy & Sarkar, 2017, n. gen.
No full textSpinaephyes n. gen. Generic diagnosis. Body fusiform. Prodorsal shield with conspicuous frontal lobe and with large spines on posterolateral margins; prodorsal tubercles with scapular setae sc ahead of rear shield margin and directed anteriorly. Dorsal annuli 2, 5, 7, 9 and 11 with large spines laterally. All coxal setae present. Paraxial tibial seta lʹ on leg I absent; antaxial genual setae lʺ on leg II absent. Tarsal empodium em entire with broad base. Epigynium with longitudinal scorings. Internal genitalia with anterior apodeme slightly curved. Type species. Spinaephyes alnus n. sp. Species included. Spinaephyes alnus n. sp. Etymology. The generic name Spinaephyes is masculine and is derived from the Latin word ‘ spina ’ meaning ‘thorn’and ‘ phyes ’means ‘grower’ (maker) referring to the spines present on the posterior lateral margins of the prodorsal shield. Differential diagnosis. Among the Tegonotini genera, this genus is very close to Spinaetergum Hong and Kuang, 1989 and Wanleelagus Chandrapatya and Boczek, 1997 in having very broad opithosomal tergites with lateral spines. Spinaephyes differs from Spinaetergum by the absence of paraxial tibial seta lʹ on leg I and antaxial genual seta lʺ on leg II. Spinaephyes differs from Wanleelagus by the number and location of spines on the dorsal annuli. In the later genus large spines are present only on the first six dorsal annuli whereas in Spinaephyes these are present on the second, fifth, seventh, ninth and eleventh dorsal annuli. Besides, in Wanleelagus scapular seta with tubercles are present on the rear shield margin whereas in Spinaephyes these setae are ahead of the rear shield margin.Published as part of Chakrabarti, Samiran, Sur, Surajit, Roy, Sourav & Sarkar, Sanjay, 2017, Two new genera and two new species of eriophyoid mites (Acari: Eriophyoidea) from North Bengal, India, pp. 172-182 in Zootaxa 4236 (1) on pages 177-179, DOI: 10.11646/zootaxa.4236.1.10, http://zenodo.org/record/32198
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