An Approximate Prediction of Metro Pit’s Sub-Step Excavation

2011 ◽  
Vol 90-93 ◽  
pp. 1926-1930
Author(s):  
Wen Wang ◽  
Hong Shan Liu

To combine the characters of metro pits and time-space effect, an approximate prediction method is studied. Sub-step excavation width, depth, unsupported exposure time and space effect are the main reasons for the displacement of excavation. To calculate the comparative displacement ratios of different parameters variational conditions and standard excavation condition, the displacement effective modulus of every parameter are obtained, and the differences of every layer excavation are also considered. The displacement of excavation can be predicted when the excavation parameters changed based on this method, and the displacement can be controlled by modulating the excavation parameters.

2019 ◽  
pp. 28-30
Author(s):  
Galina Aleksandrovna Sokolova

The article deals with the connection of time and space in literary text. It gives some definitions of the time-space concept, the chronotope; it presents different points of view of Russian linguists about the leading role of the chronotope components; it also lists the main ways of detecting the chronotope in literary work; it defines some features and characteristics of time and space in the chronotope.


2013 ◽  
Vol 392 ◽  
pp. 890-894
Author(s):  
Shao Rui Sun ◽  
Ye Xu Lu ◽  
Shao Hua Zhang ◽  
Ji Min Wu

The deformation mechanism of surrounding rock during excavation is difficult to stability evaluation for large-span shallow-buried double-arch tunnel. Take Fenghuang mountain tunnel in Suzhou city as an example, the main work and funding are as follow: The measured data in the middle of the tunnel, including settlement on the top of the tunnel and deformation between two lateral walls, were used to calculate mechanical parameters by back analysis method. The obtained parameters were used to calculate the deformation and stress of the main tunnel excavation in the different steps. The rules includes time-space effect during main tunnel excavation, force mechanism of the middle wall and settlement on the ground surface for the surrounding rock in the main tunnel. Finally, the calculated settlement and deformation were compared to the monitoring results. The safety coefficient of surrounding rock for double-arch tunnel was obtained by strength reduction theory.


Social Text ◽  
2021 ◽  
Vol 39 (2) ◽  
pp. 25-49
Author(s):  
Christen A. Smith

Abstract Examining Black women's experiences with policing, this article argues that police terror is not predicated upon gender; rather, it enacts gender by undoing gender. Thus, it requires a new arithmetic of time and space in order to read beyond normative, hypermasculine narratives of police violence. While the dominant discourse of race and policing asserts that police terror disproportionately affects Black men, the frequency of Black women's experiences with police terror attunes to a lingering yet deadly impact beyond the linear, Cartesian dimensions of body counting, a frequency the article terms sequelae. Policing stretches and bends time and space as part of its (un)gendering practice. Through a brief survey of cases in Brazil and the United States, this article considers sequelae as a new arithmetic for calculating the multiple frequencies of police terror against Black women. Specifically, the article examines the case of Luana Barbosa dos Reis, a Black lesbian mother who was beaten to death by police officers in São Paulo in 2016. The article argues that her beating was an act of (un)gendering—a desire to both discipline her as a Black female/mother and erase her potential humanity by denying her desired gender identification (female). In this sense, her death was an act of anti-Black terror “in the wake.” Through a close reading of the police ledger, the police report, and the physical violence she endured, the article argues that her story teaches us the need for a new way of counting the frequency of police terror in relationship to time, space, and the Black female/mother body.


Author(s):  
Kamna Malik

Online education is characterized by conflicting variables of time, space and interactivity. In response to the market pressure for time and space flexibility, interactivity between student-student and studentteacher usually suffers. Literature reports lack of interaction as the prime reason for reduced quality in online and hybrid courses. This chapter emphasizes the need to balance time, space and interactivity through appropriate blending of tools of interactivity so as to maximize learning as well as business outcomes. Experience related to blended use of various synchronous and asynchronous tools of interaction is shared.


Author(s):  
Ragnhild Mogren ◽  
Camilla Thunborg

The change of structures of work towards fewer boundaries in time, space and tasks are sometimes referred to as boundaryless work. ICT is pointed out as one cause of this tendency. The aim of this chapter is to discuss the role of mobile ICT in the forming of the borderland between work and non-work and the identities formed in relation to this borderland: how is mobile ICT used in work and non-work, how is this use related to the forming of a borderland between work and non-work, what are the characteristics of the identities formed in this borderland? Narratives of experience of mobile ICT practices are analysed by means of social theories. The results show that mobile ICT is used as a boundary object between work and non-work. In distinguishing between functions and artefacts, between time and space, different identities are formed: extended work identity, border identity and boundaryless identity.


2018 ◽  
Vol 60 (3) ◽  
pp. 569-598 ◽  
Author(s):  
Leslie James

AbstractRecent scholarship on Indian, African, and Caribbean political thinkers and leaders emphasizes the era leading up to and immediately after decolonization as one saturated with awareness of time and history. While much of this scholarship focuses on temporalities that open up the future, this article instead foregrounds imaginings of the present in the currency of news reports. By examining newspaper reports, we can attend in a different way to renderings of time and freedom. This article applies theoretical work on genre and addressivity to analyze how location, space, and time were simultaneously grounded and overcome by Nigerian newspaper columnists, and how this dynamic of bounded transcendence facilitated an array of social and political projects in the time-space of 1930s and 1940s colonial Nigeria. The pseudonymous writers examined in this article applied the trope of flying to exist in an alternate reality. Each “reporter” outstripped the normal logic of time and space through their ability to “jump” from place to place, and even to be in more than one place at once. By existing, as they claimed, “everywhere and nowhere” they literally and figuratively rose above the material reality of the everyday, thus ordaining an exclusive capacity for revelation.


Author(s):  
Noemi Pizarroso Lopez

Historical psychology claims that the mind has a history, that is, that our ways of thinking, reasoning, perceiving, feeling, and acting are not necessarily universal or invariable, but are instead subject to modifications over time and space. The theoretical and methodological foundations of this movement were laid in France by psychologist Ignace Meyerson in his book Les fonctions psychologiques et les œuvres, published in 1948. His program stressed the active, experimental, constructive nature of human behavior, spanning behavioral registers as diverse as the linguistic, the religious, the juridical, the scientific/technical, and the artistic. All these behaviors involve aspects of different mental functions that we can infer through a proper analysis of “works,” considered as consolidated testimonies of human activity. As humanity’s successive achievements, constructed over the length of all the paths of the human experience, they are the materials with which psychology has to deal. Meyerson refused to propose an inventory of functions to study. As unstable and imperfect products of a complex and uncertain undertaking, they can be analyzed only by avoiding the counterproductive prejudice of metaphysical fixism. Meyerson spoke in these terms of both deep transformations of feelings, of the person, or of the will, and of the so-called “basic functions,” such as perception and the imaginative function, including memory, time, space, and object. Before Meyerson the term “historical psychology” had already been used by historians like Henri Berr and Lucien Febvre, a founding member of the Annales school, who firmly envisioned a sort of collective psychology of times past. Meyerson and his disciples eventually vied with their fellow historians of the Annales school for the label of “historical psychology” and criticized their notions of mentality and outillage mental. The Annales historians gradually abandoned the label, although they continued to cultivate the idea that mental operations and emotions have a history through the new labels of a “history of mentalities” and, more recently at the turn of the century, a “history of emotions.” While Meyerson and a few other psychologists kept using the “historical psychology” label, however, mainstream psychology remained quite oblivious to this historical focus. The greatest efforts made today among psychologists to think of our mental architecture in terms of transformation over time and space are probably to be found in the work of Kurt Danziger and Roger Smith.


Author(s):  
Joan A. Vaccaro

An asymmetry exists between time and space in the sense that physical systems inevitably evolve over time, whereas there is no corresponding ubiquitous translation over space. The asymmetry, which is presumed to be elemental , is represented by equations of motion and conservation laws that operate differently over time and space. If, however, the asymmetry was found to be due to deeper causes, this conventional view of time evolution would need reworking. Here we show, using a sum-over-paths formalism, that a violation of time reversal (T) symmetry might be such a cause. If T symmetry is obeyed, then the formalism treats time and space symmetrically such that states of matter are localized both in space and in time. In this case, equations of motion and conservation laws are undefined or inapplicable. However, if T symmetry is violated, then the same sum over paths formalism yields states that are localized in space and distributed without bound over time, creating an asymmetry between time and space. Moreover, the states satisfy an equation of motion (the Schrödinger equation) and conservation laws apply. This suggests that the time–space asymmetry is not elemental as currently presumed, and that T violation may have a deep connection with time evolution.


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