Linear Models in STELLA II

""Linear Models in STELLA" is an exercise which guides students through the use of the STELLA modeling program. The exercise contains several examples with associated questions to help students walk through STELLA. The document is part of the Creative Learning Exchange a website created to facilitate communication among teachers and schools and to create a network of schools using systems education. Educational levels: High school, Middle school, Undergraduate lower division, Undergraduate upper division

Stella (1990)

Playwright: Johann Wolfgang von Goethe Director: Karl Toepfer Set Design: James K. Culley Costumes: Elizabeth Poindexter Academic Year: 1989-1990https://scholarworks.sjsu.edu/productions_1990s/1032/thumbnail.jp

Three years of experience with the STELLA robotic observatory

Since May 2006, the two STELLA robotic telescopes at the Izana observatory in Tenerife, Spain, delivered an almost uninterrupted stream of scientific data. To achieve such a high level of autonomous operation, the replacement of all troubleshooting skills of a regular observer in software was required. Care must be taken on error handling issues and on robustness of the algorithms used. In the current paper, we summarize the approaches we followed in the STELLA observatory

Separability and the stella octangula

A geometrical picture of separability of 2 x 2 composite quantum systems, showing the region of separable density matrices in the space of hermitian matrices, is given. It rests on the criterion of separability given by Peres, and it is an extension of the ``Horodecki diagram'' and the ``stella octangula'' described by Aravind.Comment: 4 pages, 1 figur

“Reread me backwards”: Deciphering the Past in Elizabeth Bowen’s The Heat of the Day

Set during the midst of the London Blitz, Elizabeth Bowen’s The Heat of the Day revolves around a narrative of espionage, but unlike many novels from the spy genre, it refuses to disclose all of its secrets. Instead, the novel’s dense and complex language, which so effectively expresses the dislocating effects of a city under attack, resists an easy or uncomplicated reading. This article examines the motif of reading within the novel, which manifests when its protagonist, Stella Rodney, learns her lover Robert is a Nazi spy. In her efforts to locate proof of his defection, Stella becomes caught in a recurrent but indeterminable task of rereading past events, a movement which attempts to remember the past but also foregrounds a fundamental inability to ever wholly resolve its enigmas. When Stella fails to read her past for lost clues, she is prevented from viewing the events of her life as a coherent and meaningful narrative. The novel’s difficult language reflects this lack of resolution, refusing to assimilate the events it depicts into a straightforward account. With its wartime setting as a disorienting backdrop, The Heat of the Day undermines the purpose of reading as the discovery of sense and meaning, producing instead only more questions and mysteries

Some Consequences of Categorification

Several conjectures on acyclic skew-symmetrizable cluster algebras are proven as direct consequences of their categorification via valued quivers. These include conjectures of Fomin-Zelevinsky, Reading-Speyer, and Reading-Stella related to $\mathbf{d}$-vectors, $\mathbf{g}$-vectors, and $F$-polynomials

Telegram from Fred Stella, Local Union President of the Communication Workers of America, to Geraldine Ferraro

Telegram from Fred Stella, President of Local Union No. 1109 of the Communication Workers of America, to Geraldine Ferraro. Includes standard response letter from Ferraro and a data entry sheet.https://ir.lawnet.fordham.edu/vice_presidential_campaign_correspondence_1984_new_york/1252/thumbnail.jp

stella Is a Maternal Effect Gene Required for Normal Early Development in Mice

Abstractstella is a novel gene specifically expressed in primordial germ cells, oocytes, preimplantation embryos, and pluripotent cells [1, 2]. It encodes a protein with a SAP-like domain [3] and a splicing factor motif-like structure, suggesting possible roles in chromosomal organization or RNA processing. Here, we have investigated the effects of a targeted mutation of stella in mice. We show that while matings between heterozygous animals resulted in the birth of apparently normal stella null offspring, stella-deficient females displayed severely reduced fertility due to a lack of maternally inherited Stella-protein in their oocytes. Indeed, we demonstrate that embryos without Stella are compromised in preimplantation development and rarely reach the blastocyst stage. stella is thus one of few known mammalian maternal effect genes [4–9], as the phenotypic effect on embryonic development is mainly a consequence of the maternal stella mutant genotype. Furthermore, we show that STELLA that is expressed in human oocytes [10] is also expressed in human pluripotent cells and in germ cell tumors. Interestingly, human chromosome 12p, which harbours STELLA, is consistently overrepresented in these tumors [11]. These findings suggest a similar role for STELLA during early human development as in mice and a potential involvement in germ cell tumors

Stella Gibbons, ex-centricity and the suburb

In The Intellectuals and the Masses (1992), John Carey writes: 'The rejection by intellectuals of the clerks and the suburbs meant that writers intent on finding an eccentric voice could do so by colonizing this abandoned territory. The two writers who did so were John Betjeman and Stevie Smith' (66). Whilst Carey's insight forms a useful starting point for this discussion, his restriction of the suburban literary terrain to just two writers must be disputed