摘要:
A mechanism is provided for minimizing aggregate power from HVAC cooling and IT equipment in a data center. The mechanism selects a high HVAC set point for low-utilization and selects a low HVAC set point for high utilization. For each cooling zone in a data center, the mechanism monitors the average utilization of equipment in the cooling zone and selects the appropriate HVAC set point based on utilization. The mechanism may determine efficiency to determine whether to adjust universal HVAC set points or the HVAC set points for each given cooling zone. That is, the mechanism may dynamically adjust HVAC set points for optimal efficiency. Alternatively, the mechanism may go beyond binary control and compute actual data center efficiency metrics to decide on intermediate set points.
摘要:
A thermally switched Silicon-On-Insulator (SOI) photo electronic device includes a silicon layer including an optical waveguide and a silicide heating element horizontally adjacent to the waveguide. The waveguide has a refractive index that changes with heat applied to the waveguide.
摘要:
Techniques for combining nanotechnology with photovoltaics are provided. In one aspect, a method of forming a photovoltaic device is provided comprising the following steps. A plurality of nanowires are formed on a substrate, wherein the plurality of nanowires attached to the substrate comprises a nanowire forest. In the presence of a first doping agent and a first volatile precursor, a first doped semiconductor layer is conformally deposited over the nanowire forest. In the presence of a second doping agent and a second volatile precursor, a second doped semiconductor layer is conformally deposited over the first doped layer. The first doping agent comprises one of an n-type doping agent and a p-type doping agent and the second doping agent comprises a different one of the n-type doping agent and the p-type doping agent from the first doping agent. A transparent electrode layer is deposited over the second doped semiconductor layer.
摘要:
Techniques for using air flow analysis to model thermal zones are provided. In one aspect, a method for modeling thermal zones in a space, e.g., in a data center, includes the following steps. A graphical representation of the space is provided. At least one domain is defined in the space for modeling. A mesh is created in the domain by sub-dividing the domain into a set of discrete sub-domains that interconnect a plurality of nodes. Air flow sources and sinks are identified in the domain. Air flow measurements are obtained from one or more of the air flow sources and sinks. An air flow velocity vector at a center of each sub-domain is determined using the air flow measurements obtained from the air flow sources and sinks. Each velocity vector is traced to one of the air flow sources, wherein a combination of the traces to a given one of the air flow sources represents a thermal zone in the space.
摘要:
Techniques for ultra-sensitive detection are provided. In one aspect, a detection device is provided. The detection device comprises a source; a drain; a nanowire comprising a semiconductor material having a first end clamped to the source and a second end clamped to the drain and suspended freely therebetween; and a gate in close proximity to the nanowire.
摘要:
A memory cell includes at least one heater, and at least two leads and a heating element which is formed between at least two leads, a material of the heating element being different from a material of at least two leads such that a location of a hot spot in the heater is controllable based on a polarity of current in the heater and at least one storage medium formed adjacent to at least one heater.
摘要:
A heater includes at least two leads, and a heating element which is formed between the at least two leads, a material of the heating element being different from a material of the at least two leads such that a location of a hot spot in the heater is controllable based on a polarity of current in the heater.
摘要:
A present invention provides real-time temperature and power mapping of fully operating electronic devices. The method utilizes infrared (IR) temperature imaging, while an IR-transparent coolant flows through a specially designed cell directly over the electronic device. In order to determine the chip power distributions the individual temperature fields for each heat source of a given power and size on the chip (as realized by a scanning focused laser beam) are measured under the same cooling conditions. Then the measured chip temperature distribution is represented as a superposition of the temperature fields of these individual heat sources and the corresponding power distribution is calculated with a set of linear equations.
摘要:
The invention provides a method and related apparatus to link and/or pattern self-assembled first objects to a second object. Each of the first object (e.g., a nanoparticle) can be embedded in a mobile binder (i.e., a stabilizer). The invention applies energy to the first object and stabilizer, links this first object to the second object, and provides a controlled linkage of the first object with respect to the second object. Applying this procedure to many such objects results in a larger areal arrangement of these linked objects. An appropriate solvent may be used to remove non-linked objects, yielding a patterned array. Thermal annealing can be applied to control the physical and chemical properties of the array.
摘要:
The invention discloses a method capable of writing/erasing high-density data, preferably on a phase-change recording media. A preferred embodiment of the invention features a novel thermal near-field heater that may be employed in an assembly enabled by the present method. The method may be preferably used for writing in a substantially thermal near-field mode. The invention provides advantages of writing densities greater than that of diffraction limited systems, for example, writing densities of approximately greater than 100 Gbit/inch2, and writing speeds approximately greater than 100 MHz.