We study the position of compact operators in the space of all continuous linear operators and its subspaces in terms of ideals. One of our main results states that for Banach spaces $X$ and $Y$ the subspace of all compact operators $\mathcal K(X,Y)$ is an $M(r_1 r_2, s_1 s_2)$-ideal in the space of all continuous linear operators $\mathcal L(X,Y)$ whenever $\mathcal K(X,X)$ and $\mathcal K(Y,Y)$ are $M(r_1,s_1)$- and $M(r_2,s_2)$-ideals in $\mathcal L(X,X)$ and $\mathcal L(Y,Y)$, respectively, with $r_1+s_1/2>1$ and $r_2+s_2/2>1$. We also prove that the $M(r,s)$-ideal $\mathcal K(X,Y)$ in $\mathcal L(X,Y)$ is separably determined. Among others, our results complete and improve some well-known results on $M$-ideals.
In analogy with effect algebras, we introduce the test spaces and $MV$-test spaces. A test corresponds to a hypothesis on the propositional system, or, equivalently, to a partition of unity. We show that there is a close correspondence between $MV$-algebras and $MV$-test spaces.
In this paper, we study the existence of the $n$-flat preenvelope and the $n$-FP-injective cover. We also characterize $n$-coherent rings in terms of the $n$-FP-injective and $n$-flat modules.
We introduce the notion of weak dually residuated lattice ordered semigroups (WDRL-semigroups) and investigate the relation between $R_0$-algebras and WDRL-semigroups. We prove that the category of $R_0$-algebras is equivalent to the category of some bounded WDRL-semigroups. Moreover, the connection between WDRL-semigroups and DRL-semigroups is studied.
We observe that a separable Banach space $X$ is reflexive iff each of its quotients with Schauder basis is reflexive. Similarly if $\mathcal L(X,Y)$ is not reflexive for reflexive $X$ and $Y$ then $\mathcal L(X_1, Y)$ is is not reflexive for some $X_1\subset X$, $X_1$ having a basis.
The study deals with political activities of the Soviet Army in Czechoslovakia after the intervention on August 21, 1968, and its sympathizers from the ranks of the Communist Party of Czechoslovakia. The authoress examines the topic in the early stage of the so-called normalization (until the spring of 1970), focusing on the local level; however, she sets her research into a broader period context and derives general conclusions from its results. Although the offi cial agreement on the temporary stay of Soviet troops in the territory of Czechoslovakia declared that the Soviet Army should not interfere with domestic affairs of the Czechoslovak state, the Soviet leadership kept devising plans how to make use of the presence of Soviet troops for political purposes. Soviet offi cers participated in the dissemination of Soviet propaganda, established contacts with local anti-reform party offi cials, spoke at their forums, complained about hostile attitudes of Czechoslovak political bodies, and thus kept pressing for a legitimization of the political arrangements. The authoress shows that local pro-Soviet activists, who had maintained contacts with the Soviet Army from the very beginning and been taking over its political agenda, were playing a crucial role in the success of these efforts. In line with Soviet intentions, they were implementing the normalization process ''from below'',initiating purges in various organs, demanding the dismissal of offi cials protesting against presence of the Soviet Army, participating in the subsequent political vetting. They were actively pushing through a change of the offi cial approach to the Soviet Army and helped break its boycott by the Czechoslovak society, which had initially been almost unanimous. In doing so, they were making use of their personal contacts to organize manifestation ''friendship'' meetings and visits of Soviet soldiers to Czechoslovak schools and factories. The authoress analyzes the reasons of the attitude of these activists, most of whom came from the ranks of ''old'' (pre-war) and ''distinguished'' members of the Communist Party of Czechoslovakia, and illustrates the development outlined above by specifi c examples. By way of conclusion, she notes that, although different forms of the CzechoslovakSoviet ''friendship'' since 1968 are often viewed as mere formalistic acts without any deeper meaning at the level of ''lived'' experience, they were, from the viewpoint of the Soviet policy, well thought-out and centrally planned propagandistic activities which contributed to the promotion of the Soviet interpretation of the Prague Spring and the Soviet invasion and discredited its opponents. and Přeložila Blanka Medková
Homeownership has been in decline in a number of developed societies since the early 2000s driven, primarily, by declining entry among younger households who have been increasingly pushed into the rental sector. This trend has been associated with a growing intergenerational divide, or even conflict, and the emergence of ‘Generation Rent’. This paper explores the conditions surrounding diminishing access to owner-occupation among new households with a focus on the historic maturation of homeownership sectors, the restructuring of the political economy (financialization) around housing wealth and the inter-cohort dynamics surrounding the accumulation and transfer of housing wealth. The paper takes an international perspective drawing on evidence from two parallel, but contrasting cases: Japan and the UK. The analysis illustrates the interrelatedness of interand intra-generational inequalities, with the former reinforcing the latter. It also focuses on the role of families as both a moderator of generational inequity at the micro level as well as an enhancer of socioeconomic inequalities overall.
This article explores the trajectory of so-called guaranteed social housing in the Czech Republic as an example of penetrating financial instruments into the public policy realm. The project, promoted by the government’s Agency for Social Inclusion, was intended to encourage private landlords to rent their properties to people in need through commercial insurance against the risk of rent defaults. Using policy documents, media and interviews with governmental officers, the article describes the performative strength of financial instruments in the sphere traditionally occupied by the welfare state. In financialisation literature, the proliferation of financial instruments is often described as a one-way process in which these instruments colonise public domains. However, the empirical case discussed in the article shows that this process is much more complex and contingent, and financial instruments are not used as the best option but rather as a last resort in a situation marked by weak policies.
In the course of cytogenetic studies on Alegoria castelnaui Fleutiaux & Sallé 1889 (Coleoptera: Tenebrionidae: Tenebrioninae: Ulomini) from Guadeloupe, a number of adult specimens were dissected. A larva was found in the abdomens of almost all of the females. The karyotype, 20,XX / 20,Xyp, and the presence of heterochromatin at multiple chromosomal locations, of the larvae and adults were similar, which excludes parasitism and indicates viviparous reproduction. The adverse habitat of the adults, i.e., putrid and fermenting pseudo-stems of banana trees rather than geo-climatic conditions, may explain the occurrence of viviparity in this species. This is the first example of (ovo-)viviparity in the Ulomini tribe and among New World Tenebrionidae. A. castelnaui is regularly collected on banana trees infested with the weevil Cosmopolites sordidus Germar, 1824, a major pest of banana trees around the word. The coexistence of these two species on banana trees may be coincidental but another Ulomini species, Eutochia pulla Erichson 1843, is described as an egg predator of C. sordidus in Africa and therefore, A. castelnaui could also be a predator of this pest.
(Pro)renin receptor (PRR) contributes to regulating many physiological and pathological processes; however, the role of PRR-mediated signaling pathways in myocardial ischemia/reperfusion injury (IRI) remains unclear. In this study, we used an in vitro model of hypoxia/reoxygenation (H/R) to mimic IRI and carried out PRR knockdown by siRNA and PRR overexpression using cDNA in H9c2 cells. Cell proliferation activity was examined by MTT and Cell Counting Kit-8 (CCK-8) assays. Apoptosis-related factors, autophagy markers and β-catenin pathway activity were assessed by real-time PCR and western blotting. After 24 h of hypoxia followed by 2 h of reoxygenation, the expression levels of PRR, LC3B-I/II, Beclin1, cleaved caspase-3, cleaved caspase-9 and Bax were upregulated, suggesting that apoptosis and autophagy were increased in H9c2 cells. Contrary to the effects of PRR downregulation, the overexpression of PRR inhibited proliferation, induced apoptosis, increased the expression of pro-apoptotic factors and autophagy markers, and promoted activation of the β-catenin pathway. Furthermore, all these effects were reversed by treatment with the β-catenin antagonist DKK-1. Thus, we concluded that PRR activation can trigger H/R-induced apoptosis and autophagy in H9c2 cells through the β-catenin signaling pathway, which may provide new therapeutic targets for the prevention and treatment of myocardial IRI.