350 research outputs found
Organizing sustainable development
The role and meaning of sustainable development have been recognized in the scientific literature for decades. However, there has recently been a dynamic increase in interest in the subject, which results in numerous, in-depth scientific research and publications with an interdisciplinary dimension. This edited volume is a compendium of theoretical knowledge on sustainable development. The context analysed in the publication includes a multi-level and multi-aspect analysis starting from the historical and legal conditions, through elements of the macro level and the micro level, inside the organization. Organizing Sustainable Development offers a systematic and comprehensive theoretical analysis of sustainable development supplemented with practical examples, which will allow obtaining comprehensive knowledge about the meaning and its multi-context application in practice. It shows the latest state of knowledge on the topic and will be of interest to students at an advanced level, academics and reflective practitioners in the fields of sustainable development, management studies, organizational studies and corporate social responsibility
Beam scanning by liquid-crystal biasing in a modified SIW structure
A fixed-frequency beam-scanning 1D antenna based on Liquid Crystals (LCs) is designed for application in 2D scanning with lateral alignment. The 2D array environment imposes full decoupling of adjacent 1D antennas, which often conflicts with the LC requirement of DC biasing: the proposed design accommodates both. The LC medium is placed inside a Substrate Integrated Waveguide (SIW) modified to work as a Groove Gap Waveguide, with radiating slots etched on the upper broad wall, that radiates as a Leaky-Wave Antenna (LWA). This allows effective application of the DC bias voltage needed for tuning the LCs. At the same time, the RF field remains laterally confined, enabling the possibility to lay several antennas in parallel and achieve 2D beam scanning. The design is validated by simulation employing the actual properties of a commercial LC medium
Towards specification formalisms for data warehouse systems design
Text in English with abstracts and keywords in English, Afrikaans and SetswanaSeveral studies have been conducted on formal methods; however, few of these studies
have used formal methods in the data warehousing area, specifically system
development. Many reasons may be linked to that, such as that few experts know how to
use them. Formal methods have been used in software development using mathematical
notations. Despite the advantages of using formal methods in software development,
their application in the data warehousing area has been restricted when compared with
the use of informal (natural language) and semi-formal notations.
This research aims to determine the extent to which formal methods may mitigate failures
that mostly occur in the development of data warehouse systems. As part of this research,
an enhanced framework was proposed to facilitate the usage of formal methods in the
development of such systems. The enhanced framework focuses mainly on the
requirements definition, the Unified Modelling Language (UML) constructs, the Star
model and formal specification. A medium-sized case study of a data mart was
considered to validate the enhanced framework. This dissertation also discusses the
object-orientation paradigm and UML notations.
The requirements specification of a data warehouse system is presented in natural
language and formal notation to show how a formal specification may be drifted from
natural language to UML structures and thereafter to the Z specification using an
established strategy as a guideline to construct a Z specificationAlhoewel verskeie studies oor formele metodes gedoen is, het min hiervan formele
metodes in die databergingarea, spesifiek stelselontwerp, gebruik. Dit kan aan baie redes
toegeskryf word, soos dat min kundiges weet hoe om dit te gebruik. Formele metodes is
in sagtewareontwikkeling gebruik wat wiskundige notasies gebruik. Ten spyte van die
voordele van formele metodes in sagtewareontwikkeling, is die toepassing daarvan in
die databergingarea beperk wanneer dit met die gebruik van informele (natuurlike taal)
en semiformele notasies vergelyk word.
Hierdie navorsing beoog om te bepaal tot watter mate formele metodes foute kan
uitskakel wat hoofsaaklik in die ontwikkeling van databeringstelsels voorkom. As deel
van hierdie navorsing is 'n beter raamwerk voorgestel om die gebruik van formele
metodes in die ontwikkeling van sulke stelsels te fasiliteer. Die beter raamwerk fokus
hoofsaaklik op die definisie van vereistes, die Unified Modelling Language (UML) -
konstukte, die Star-model en formele spesifikasies. Die mediumgrootte gevallestudie van
'n datamark is oorweeg om die beter raamwerk geldig te verklaar. Hierdie verhandeling
bespreek ook die voorwerpgeoriënteerde paradigma en die UML-notasies.
Die vereiste spesifikasie van 'n databergingstelsel word in natuurlike taal en formele
notasie voorgehou om aan te dui hoe 'n formele spesifikasie van natuurlik taal na UML strukture kan verskuif en daarna na die Z-spesifiekasie deur 'n gevestigde strategie as 'n
riglyn te gebruik om 'n Z-spesifikasie te konstrueer.Go nnile le dithutopatlisiso di le mmalwa ka mekgwa e e fomale, fela ga se
dithutopatlisiso tse dintsi tsa tseno tse di dirisitseng mekgwa e e fomale mo karolong ya
bobolokelobogolo jwa data, bogolo segolo mo ntlheng ya thadiso ya ditsamaiso tsa
dikhomphiutha. Go ka nna le mabaka a le mantsi a a ka golaganngwang le seno, go
tshwana le gore ga se baitseanape ba le kalo ba ba itseng go e dirisa. Mekgwa e e fomale
e e dirisitswe mo tlhabololong ya dirweboleta go dirisiwa matshwao a dipalo. Le fa go
na le melemo ya go dirisa mekgwa e e fomale mo tlhabololong ya dirweboleta, tiriso ya
yona mo bobolokelobogolong jwa data e lekanyeditswe fa e tshwantshanngwa le tiriso ya
matshwao a a seng fomale (puo ya tlwaelo) le a a batlang a le fomale.
Patlisiso eno e ikaelela go bona gore a mekgwa e e fomale e ka fokotsa go retelelwa go go
diragalang gantsi mo tlhabololong ya ditsamaiso tsa bobolokelobogolo jwa data. Jaaka
karolo ya patlisiso eno, go tshitshintswe letlhomeso le le tokafaditsweng go bebofatsa
tiriso ya mekgwa e e fomale mo tlhabololong ya ditsamaiso tse di jalo. Letlhomeso le le
tokafaditsweng le tota ditlhokego tsa tlhaloso, megopolo ya Unified Modelling Language
(UML), sekao sa Star le ditlhokego tse di rulaganeng. Go dirisitswe patlisiso ya tobiso e e
magareng ya data mart go tlhomamisa letlhomeso le le tokafaditsweng. Tlhotlhomisi eno
gape e lebelela pharataeme e e totileng sedirwa/selo le matshwao a UML.
Ditlhokego tsa tsamaiso ya polokelokgolo ya data di tlhagisiwa ka puo ya tlholego le matshwao a a fomale go bontsha ka moo tlhagiso e e fomale e ka lebisiwang go tswa kwa
puong ya tlholego go ya kwa dipopegong tsa UML mme morago e lebe kwa tlhalosong
ya ditlhokego ya Z go dirisiwa togamaano e e ntseng e le gona jaaka kaedi ya go aga
tlhaloso ya ditlhokego ya Z.School of ComputingM. Sc. (Computing
1-D broadside-radiating leaky-wave antenna based on a numerically synthesized impedance surface
A newly-developed deterministic numerical technique for the automated design of metasurface antennas is applied here for the first time to the design of a 1-D printed Leaky-Wave Antenna (LWA) for broadside radiation. The surface impedance synthesis process does not require any a priori knowledge on the impedance pattern, and starts from a mask constraint on the desired far-field and practical bounds on the unit cell impedance values. The designed reactance surface for broadside radiation exhibits a non conventional patterning; this highlights the merit of using an automated design process for a design well known to be challenging for analytical methods. The antenna is physically implemented with an array of metal strips with varying gap widths and simulation results show very good agreement with the predicted performance
Pengembangan Sistem Transaksi Pulsa Berbasi Android Dan Web Dengan Menerapkan Metode Bottom-Up Untuk Mendesain Ulang Database Pada Sistem Software Pulsa
Kebutuhan akan pulsa menjadi kebutuhan wajib di sebagian besar masyarakat saat ini, didorong oleh perkembangan teknologi smartphone yang semakin pesat dan semakin terjangkau. Situasi pandemi COVID-19 semakin meningkatkan permintaan penggunaan pulsa data untuk tetap terkoneksi dengan internet, sehingga menjadikan bisnis pulsa sebagai sumber pendapatan yang potensial. VRE(Voucher Refill Engine) merupakan salah satu software server pulsa yang mengatur setiap pengisian transaksi pulsa. Fungsi utama VRE adalah memudahkan proses transaksi pulsa dari seller ke konsumen dengan cepat dan stabil, serta mengatur stok produk-produk pulsa yang tersedia agar selalu terupdate dan tidak kehabisan stok. Selain itu, VRE juga dapat menghasilkan laporan keuangan yang detail untuk memudahkan pengelolaan keuangan dan monitoring bisnis. Namun, karena teknologi yang digunakan masih terbatas proses transaksi saat ini yang dilakukan VRE hanya melalui SMS atau chat yang tentunya memiliki keterbatasan dan biaya tambahan bagi penjual sehingga mengurangi keuntungan. Untuk mengatasi hal tersebut agen perlu berinovasi dengan mengembangkan aplikasi berbasis android untuk transaksi pulsa. Oleh karena itu, perlu dibangun aplikasi Android dari sistem sotware pulsa VRE menggunakan metode perancangan basis data, seperti pendekatan bottom-up, untuk mendesain ulang struktur basis data dan memungkinkan pengembangan aplikasi berbasis Android dan web. Jurnal ini membahas tantangan yang dihadapi agen dalam bisnis pulsa, keterbatasan proses transaksi saat ini, dan solusi yang diusulkan untuk desain database dan pengembangan aplikasi berbasis Android serta web yang digunakan untuk setting menu dan tampilannya lainnya di android
Covid Conspiracy Theories in Global Perspective
Covid Conspiracy Theories in Global Perspective examines how conspiracy theories and related forms of misinformation and disinformation about the Covid-19 pandemic have circulated widely around the world.
Covid conspiracy theories have attracted considerable attention from researchers, journalists, and politicians, not least because conspiracy beliefs have the potential to negatively affect adherence to public health measures. While most of this focus has been on the United States and Western Europe, this collection provides a unique global perspective on the emergence and development of conspiracy theories through a series of case studies. The chapters have been commissioned by recognized experts on area studies and conspiracy theories.
The chapters present case studies on how Covid conspiracism has played out (some focused on a single country, others on regions), using a range of methods from a variety of disciplinary perspectives, including history, politics, sociology, anthropology, and psychology. Collectively, the authors reveal that, although there are many narratives that have spread virally, they have been adapted for different uses and take on different meanings in local contexts.
This volume makes an important contribution to the rapidly expanding field of academic conspiracy theory studies, as well as being of interest to those working in the media, regulatory agencies, and civil society organizations, who seek to better understand the problem of how and why conspiracy theories spread
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Examining university student satisfaction and barriers to taking online remote exams
Recent years have seen a surge in the popularity of online exams at universities, due to the greater convenience and flexibility they offer both students and institutions. Driven by the dearth of empirical data on distance learning students' satisfaction levels and the difficulties they face when taking online exams, a survey with 562 students at The Open University (UK) was conducted to gain insights into their experiences with this type of exam. Satisfaction was reported with the environment and exams, while work commitments and technical difficulties presented the greatest barriers. Gender, race and disability were also associated with different levels of satisfaction and barriers. This study adds to the increasing number of studies into online exams, demonstrating how this type of exam can still have a substantial effect on students experienced in online learning systems and
technologies
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