The impact of one unit on Sindh’s political future after its abolition

Pakistan's federalism problem dates all the way back to the establishment of the republic. Pakistan was established during many problems, many of which involved the state's government and administration. After Pakistan's inception, Federalism has been recognized as a political structure. The Muslim League was Pakistan's democratic body, and it called for the provinces of United India to have complete provincial autonomy. In the other side, the Congress favored a moderate federation. Due to the Muslim League's extensive past and tradition, it has been forced to recognize Federalism as a state system. Karachi, a major commercial center in Sindh, was annexed by the federal government and incorporated into its region. As a consequence of this undemocratic act, Sindh's ministry was dissolved, and Karachi was put under federal administration. The smaller provinces were compelled to form One Unit as a result of this development. The One-unit structure scrapped Sindh's territorial position and fundamentally altered its demography. After Bengal's dismemberment, Punjab became the only ruling state, controlling the state structure. Sindh remained marginalized in this province. Sindh has always met with the same fate. Furthermore, Pakistan's constitutions made no provision for Sindh's provincial hegemony. This thesis makes an empirical attempt to examine the historical connection between the Centre and Sindh.

The Architecture of ELT Coursebooks

This paper is an attempt to develop a design-oriented approach to ELT coursebook evaluation, with a particular focus on the internal organization of coursebook units at both intra-unit and inter-unit levels. We believe that looking at coursebooks from the position of the materials designer sheds some additional light on ELT coursebook evaluation. The design-oriented approach to ELT coursebook assessment proposed in the paper goes well beyond the immediate, and often superficial, ‘check-list’ methods commonly used to help teachers select coursebooks. In other words, the design-oriented approach to ELT coursebook assessment enables teachers an insight into ‘the architecture’ of textbooks. On this ‘journey to the centre of ELT textbooks’, we try to highlight how language teaching materials have been resolving the conundrum of the dynamic combination of the What (content), and the How (pedagogy/methodology). In presenting a materials design process, we start off with the assumption that there has always been a broad basis of theoretical and pedagogical notions that can inform the content and organization of ELT coursebooks, and upon which coursebook writers can build when designing instructional materials. The article then discusses three stages of the design process, offering a more detailed analysis of the complex issue of unit structure at intra- and inter-unit levels. We explore different formats of unit structure, its components, ways of creating coherence throughout the unit, and its underlying methodology/pedagogy. The last point prompts the conclusion that today’s ELT materials are produced in response to a perceived market demand that is often at variance with the latest theoretical developments in ELT.

A Dual-Frequency Miniaturized Frequency Selective Surface Structure Suitable for Antenna Stealth

A tiny dual-band frequency selective surface structure is proposed in this paper. With dual-band rejection characteristics at the corresponding frequency points of the S-band and C-band, suitable for antenna stealth. To achieve miniaturization, the unit-cell architecture resembles the shape of a “S.” First of all, the author describes the parameters of the surface element, and then, the transmission characteristics of the surface element are analyzed by the equivalent circuit method. By maintaining a constant response to TE and TM polarization patterns and oblique incident angles, the suggested device ensures angular independence. The measured findings from the constructed FSS are used to validate the computed results. Finally, a new unit structure is provided for the application of FSS in antenna stealth.

How and When Health-Promoting Leadership Facilitates Employee Health Status: The Critical Role of Healthy Climate and Work Unit Structure

Health-promoting leadership has attracted a lot of attention from scholars in recent years. However, majority studies focused on theoretical arguments rather than empirical examination. Not only that, extant research often theorizes health-promoting leadership as a combination of a series of direct and explicit health-related behaviors, neglecting the potential social information it may convey to employees. Based on social information processing theory, this study empirically examines how and when health-promoting leadership can facilitate employees’ health status. Using a time-lagged data of 370 employees (i.e., matched to 51 leaders), we found that health-promoting leadership has a significant and positive influence on employees’ health status, and healthy climate acts as a linking pin. In addition, work unit structure moderates the relationship between health-promoting leadership and healthy climate. Specifically, compared with mechanic work unite structure, employees rely more on social information conveyed by health-promoting leadership when working at an organic work unite structure. This study not only extends current knowledge about the effect of health-promoting leadership, but also provides useful guidance for practitioners.

Workforce demographics and unit structure in paediatric cardiac critical care in the United States

Objective: To assess current demographics and duties of physicians as well as the structure of paediatric cardiac critical care in the United States. Design: REDCap surveys were sent by email from May till August 2019 to medical directors (“directors”) of critical care units at the 120 United States centres submitting data to the Society of Thoracic Surgeons Congenital Heart Surgery Database and to associated faculty from centres that provided email lists. Faculty and directors were asked about personal attributes and clinical duties. Directors were additionally asked about unit structure. Measurements and main results: Responses were received from 66% (79/120) of directors and 62% (294/477) of contacted faculty. Seventy-six percent of directors and 54% of faculty were male, however, faculty <40 years old were predominantly women. The majority of both groups were white. Median bed count (n = 20) was similar in ICUs and multi-disciplinary paediatric ICUs. The median service expectation for one clinical full-time equivalent was 14 weeks of clinical service (interquartile range 12, 16), with the majority of programmes (86%) providing in-house attending night coverage. Work hours were high during service and non-service weeks with both directors (37%) and faculty (45%). Conclusions: Racial and ethnic diversity is markedly deficient in the paediatric cardiac critical care workforce. Although the majority of faculty are male, females make up the majority of the workforce younger than 40 years old. Work hours across all age groups and unit types are high both on- and off-service, with most units providing attending in-house night coverage.

Microstrip Antenna with High Gain and Strong Directivity Loaded with Cascaded Hexagonal Ring-Shaped Metamaterial

A new cascaded hexagonal ring-shaped metamaterial element is designed, which is arranged periodically and placed on the top of a traditional microstrip antenna to optimize the performance of the traditional antenna. The simulation results show that the new metamaterial microstrip antenna works at near 10 GHz, the impedance bandwidth is extended by 0.25 GHz and the gain is increased by 113.6% compared with a traditional microstrip antenna. Cross-shaped slots are etched on the ground plate of the microstrip antenna to widen the impedance bandwidth. It is shown that the impedance bandwidths at the resonant frequencies of 10 GHz and 14 GHz are broadened by 0.06 GHz and 0.56 GHz, respectively, and the gain of the slot-etched antenna is 13.454 dB. After the metamaterial unit structure is optimized, a nested double-hexagon ring-shaped electromagnetic metamaterial unit structure is proposed. The metamaterial slot microstrip antenna operates in two frequency bands of 10 GHz and 14 GHz; the relative bandwidths are increased to 16.9% and 19.4% with two working bandwidths of 1.74 GHz and 4.98 GHz, respectively; and the gain and directivity are also improved compared with the traditional microstrip antenna. The metamaterial unit structure proposed in this paper is of certain reference value for the variety of metamaterial and the application of metamaterial in traditional microstrip antennas.

Integrated structural reconstruction of unit structures of the meta-stable grain boundaries in diamond-structured materials presents first-order like phase transition.

One of the important issues of studying grain boundaries (GBs) which has recently attracted increasing interests is to investigate the phase behavior of GBs that one GB with determined disorientation and plane orientation (known as macroscopic parameters) can exist as distinct phases and perform phase transition. While such an issue has been investigated in fcc and bcc metals, GB phases in other elemental materials have not been reported. This work by applying molecular dynamics (MD) simulation explored totally around 7000 meta-stable GB phases of the <110>∑9(22‾1‾) symmetric tilt GB of silicon, germanium and diamond carbon as diamond-structured elemental materials. Meta-stable phases commonly exist in different elements were discovered and some of them were successfully verified to be reasonable by first-principle simulation. The verified meta-stable GBs were subsequently proved to have different capability to transform to the ground-stable GB at elevated temperature under MD simulation and to perform different pre-melting behaviors. We discovered a bi-directional structural reconstruction mechanism of the unit structure belonging to one of the verified meta-stable phases, by which the unit structures can transform to identical unit structures of the ground-stable GB which can present ‘opposite orientation’. Through computing the kinetic barriers by nudged-elastic-band and annealing simulation using MD, the integral behavior of the unit structures’ reconstruction is found to be a first-order like phase transition. Our work extended the research on GB phases from metals to diamond-structured materials and discovered a new GB phase transition mechanism which has not been reported before.

A Bifunctional Silicon Dielectric Metasurface Based on Quasi-Bound States in the Continuum

Quasi-bound states in the continuum provide an effective and observable way to improve metasurface performance, usually with an ultra-high-quality factor. Dielectric metasurfaces dependent on Mie resonances have the characteristic of significantly low loss, and the polarization can be affected by the parameter tuning of the structure. Based on the theory of quasi-bound states in the continuum, we propose and simulate a bifunctional resonant metasurface, whose periodic unit structure consists of four antiparallel and symmetrical amorphous silicon columns embedded in a poly(methyl methacrylate) layer. The metasurface can exhibit an extreme Huygens’ regime in the case of an incident plane wave with linear polarization, while exhibiting chirality in the case of incident circular polarized light. Our structure provides ideas for promoting the multifunctional development of flat optical devices, as well as presenting potential in polarization-dependent fields.