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The University City of Buea in Cameroon – Africa has been named the Silicon Mountain of Africa due to the growing number of Software-based, technopreneurship activities within the city. The uniqueness in methodological approach used for educating and training graduates from major universities in this city remains undiagnosed, although its impact is already being felt internationally. This paper reports...
Currently, solar energy is the primary source of energy for space missions. The development of space systems is affected to many fields: the study of space itself, the science of materials and especially the field of energy. Indeed, solar panels are the only non-nuclear means that enable satellites in orbit to be fed continuously. The efficiency of these solar cells increases. Current triple junction...
The electric power system is moving rapidly towards an increased penetration of renewable energy resources. The new power to gas (PtG) technology has been recently introduced as a means to prevent renewable generation curtailment and to store any excess of renewable energy production during off-peak periods. This paper proposes a methodology for simultaneously studying the combined system flow of...
Despite the high phase non-linearity of a Silicon Mach-Zehnder Modulator in forward bias, we demonstrate that high third order spur-free dynamic range ~102.8 dB. Hz2/3 can be obtained by optimizing the D.C. bias operating point at 1 GHz.
We demonstrate multi-level optical weights embedded in a silicon photonic platform based on ferroelectric domain switching. Ferroelectric barium titanate integrated on silicon resonator structures is used as the memory material. By applying short voltage pulses of 100ns, we can switch fractions of the ferroelectric domains and thus change the transmission of the waveguides by more than one order of...
Algorithm research of task scheduling is one of the key techniques in grid computing. This paper firstly describes an DAG task scheduling model used in grid computing environment, then discusses generational scheduling (GS) and communication inclusion generational scheduling (CIGS) algorithms. Finally, an improved CIGS algorithm is proposed to use in grid computing environment, and it has been proved...
Forthcoming CMOS technology nodes are in principle sufficient for achieving both the quantum information density and the speed that are critical for error-free logical qubits. Using data from the roadmap for semiconductor devices from ITRS and IEDM, we applied the standard CMOS design rules to a universal set of quantum logic gates to control silicon qubits. We consequently obtain a scaling law for...
Mimicking the collaborative behavior of biological swarms, such as bird flocks and ant colonies, Swarm Intelligence algorithms provide efficient solutions for various optimization problems. On the other hand, a computational model of the human brain, spiking neural networks, has been showing great promise in recognition, inference, and learning, due to recent emergence of neuromorphic hardware for...
In the past several decades on-chip dimensions have scaled over 2000X, while dimensions on printed circuit board have scaled 4-5X. This modest scaling of packaging dimensions has severely limited system scaling. To address this, we have proposed a disruptive package-free integration scheme. We replace the traditional organic printed circuit board (PCB) with silicon interconnect fabric (SiIF) and replace...
The Tactile Internet refers to the communication networks that have a closed control loop of tactile input and audio and/or visual feedback. Example applications include telerehabilitation and virtual training. To ensure that these applications have unnoticeable latencies and thus satisfied quality-of-service and quality-of-experience requirements, the Tactile Internet needs to guarantee round-trip...
This papers describes a proof-of-concept implementation of the Service Function Chaining Control Plane, exploiting the IETF Network Service Header approach. The proposed implementation combines the OpenFlow protocol to control and configure the network nodes and the NSH method to adapt the service requirements to the transport technology. The manuscript shows that the result of this combination is...
We consider an infrastructure of networked systems with discrete components that can be reinforced at certain costs to guard against attacks. The communications network plays a critical, asymmetric role of providing the vital connectivity between the systems. We characterize the correlations within this infrastructure at two levels using (a) aggregate failure correlation function that specifies the...
Solder joint crack is increasing with increasing of warpage caused by larger Wafer Level Chip Size Package (WLCSP). Bump Support Film (BSF) were proposed as a protect material for preventing a solder joint crack of bumps. The BSF was constructed of a back grind tape and Bump Support Layer (BSL) which was composed of thermosetting epoxy resin. One of the key points of forming the BSL on a wafer which...
On the transmission line, connectors cause signal integrity, or SI reduction because their parasitic inductances bring on characteristic impedance mismatching. Particularly, the connectors used in high-speed bus systems, such as PCI-express, USB, and SATA in GHz domain cause serious SI degradation, resulting in mal-operation in the systems. The transmission systems on printed circuit boards (PCBs)...
We present a new bidirectional optical subassembly (BOSA) packaging method which utilizes silicon optics and mechanics to integrate a lens, a DFB laser, a monitor photodiode (MPD) and a wavelength division multiplexing (WDM) filter into a silicon submount. The technology enables a compact packaging form within in a single trasnsistor outline can (TO-can) for BOSA. We made most of the assembly process...
An overview on the recent progress of Si insulated gate bipolar transistors (IGBTs) and SiC MOSFETs as key components in today's power electronic system is given. The state-of-the-art device concepts are explained as well as an outlook about ongoing and foreseeable development steps are shown.
The new product development and operational marketing literature grapples with incorporation of uncertainty on the market and technological structure discovered over time. In contrast, market and technological uncertainty is at the heart of neo-Schumpeterian agent-based models used in evolutionary innovation economics. We present a novel agent-based model in which designer agents design products to...
In this paper, we have investigated the non-ballistic properties of Silicon Nanowire Field Effect Transistor (SiNW-FET) which has significant potential in future nanoelectronic applications. Our first goal is to study the effects of non-ballistic properties like elastic scattering and strain effect. The study reveals that elastic scattering decreases the drain current whereas tensile strain tends...
GaAs-based Blocked-Impurity-Band (BIB) detector, as a potential high-sensitive, low noise Terahertz (THz) detector, has been developed for the broad application in the area of THz security check and astronomy mission. In this work, GaAs:Si and GaAs:Te BIB detectors were fabricated. Their responsivity properties were measured at T=3.5K, under different biases and the same black body temperature of...
Through silicon vias (TSVs) are arranged to form a rectangular resonant cavity to improve performance of silicon based antenna in this paper. On the basis of fundamental theory of rectangular resonant cavity, the model of cavity made of through silicon vias is analyzed. Considering the size of millimeter-wave antenna, the three dimensions of cavity for mode TE101 is calculated. Applying the resonant...
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