UAIPD 09-0027
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This document describes a new drill design that reduces stress on diamond coatings. It summarizes: 1) Current drill designs suffer from adhesion problems and thickness limitations of diamond coatings due to residual stresses. 2) The new design lowers stress on the diamond coating through perfecting the geometry of the drill design at both the macro and micro levels. 3) This decreases delamination of the coating by reducing the amount of stress, extending drill life and increasing the number of holes drilled before failure.
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The document summarizes the results of a survey of dilapidated buildings in Mumbai carried out by the BMC. Key points:
- The BMC survey found 1,236 dilapidated structures, a 29% rise from the previous year. Most are in south Mumbai and western suburbs.
- Of the total, 840 are privately owned, 230 are cessed structures, and 166 are owned by the BMC. The highest numbers are in specific wards like Dongri.
- The buildings have been classified from C1 (dangerous) to C3 (minor repairs). Of over 32,000 dilapidated buildings, 593 are C1 and have been vacated or had utilities disconnected.
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The document summarizes the results of a survey of dilapidated buildings in Mumbai carried out by the BMC. Key points:
- The BMC survey found 1,236 dilapidated structures, a 29% rise from the previous year. Most are in south Mumbai and western suburbs.
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Rangka Baja Ringan Smartruss Truecore
Rangka Baja Ringan Smartruss Truecore dari Bluescope Lysaght.
Untuk pemesanan dapat menghubungi kami.
Email: info@paramasteel.id
Tlp: 021-5853738
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Our Wheel Spacers are positioning elements to be used in vertical structures (walls, columns, etc...) with single mesh or rebar configuration. They can hold fine mesh up to ½ inch thick rebar.
This elements are made from high quality polypropylene, guaranteeing strength and stability around the central axis of these elements, our exclusive designs and quality of materials used, allow for an auto-lockdown of these spacers around the periphery of the rebar, achieving a stable position in the steel structure, this prevents the spacer from moving sharply in the pouring and vibrating procedures and subsequently breaking.
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The document provides instructions for a laboratory exam involving various woodworking and pipe fitting tasks. Students are asked to: 1) Make a pipe fitting connection from drawing of a 50mm diameter PVC pipe. 2) Create a middle lap joint from wooden work pieces. 3) Make a mortise and tenon joint from provided wood. 4) Cut threads on the end of a pipe using a pipe-die. 5) Assemble a PVC pipe joint using pipes, elbow, and solvent cement. 6) Construct a dovetail joint from a 50x35x250mm reaper. Marks are allocated for viva voice, aim and procedure, model, and finishing and accuracy.
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This document describes a new technology for storing and controlling the release of admixtures in concrete. Currently, admixtures added to concrete can have undesired effects on hydration. The new technology uses a two-step process: 1) perforated cenospheres are produced to load admixtures and 2) a nanosilica coating is applied to the cenospheres. This "hard encapsulation" method minimizes unwanted effects on hydration by storing the admixtures and controlling their release. The cenospheres have advantages like strength, stability, and ability to hold large amounts of admixture uniformly distributed in concrete.
UAIPD 15-0017
This document describes Dr. Vinu Unnikrishnan's development of a novel silicone-based biofidelic human skin simulant. Currently, existing skin surrogates have varying mechanical properties and accurate models have not been developed, requiring the use of swine in biomedical testing which presents ethical issues. Dr. Unnikrishnan's simulant is a four-part silicone material that precisely mimics the thickness, biomechanical behaviors under stress and stretch, elasticity, and fracture stress of human skin. It is affordable, has no shelf life or biosafety issues, can be used for non-lethal ballistics testing, and its fabrication process allows for different body part simulations.
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The document describes an invention for a wheel chair cushion monitor created by Dr. Edward Sazonov that aims to automatically detect and adjust patients in wheelchairs to prevent pressure ulcers by mechanically adjusting their position and displaying real-time feedback, as approximately 25% of spinal cord injury patients develop pressure ulcers which are difficult to treat and currently require expensive and inaccurate pressure mapping methods to monitor. The proposed cushion monitoring system would help address this issue through low-cost, accurate real-time pressure monitoring and automatic repositioning of patients in wheelchairs.
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The document describes a new technology for creating core-shell magnets without using rare-earth metals. It involves using remanent magnetization to self-assemble core-shell nanoparticles that provide magnetic exchange coupling between a hard core and soft shell. This enhances the magnetic properties of the core material and could lead to cheaper magnets as an alternative to rare-earth magnets commonly used in automotive engines.
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Dr. Dawen Li has developed a novel method for improving the growth of TIPS pentacene films for use as a charge mobility layer in organic thin film transistors. The method utilizes a thermal gradient during solution processing to promote well-oriented crystal growth, resulting in films with order of magnitude higher charge carrier mobility. This allows for transistors with improved air stability and easier processing. If commercialized, it could benefit applications in organic electronics like OLED displays and solar cells.
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The document describes a technology for using shape-controlled magnetic nanoparticles as T1 contrast agents for magnetic resonance imaging (MRI) to address current problems with existing contrast agents. By tuning the shape of iron oxide nanoparticles into whiskers, plates or wires, it increases their effectiveness as contrast agents by providing brighter, clearer images and enabling targeted imaging with an enhanced residence time. The technology was developed by Dr. Yuping Bao at the University of Alabama and has the potential advantages of being safer, more effective and increasing contrast agent retention time compared to existing agents.
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Atecon products focus on solving the dilemma on how to guarantee the proper cover or distancing between the metallic structure (rebar) and the terrain or formwork.
In any type of of construction site our Accessories will help you achieve better efficiencies, security and productivity
ASD Rehabilitation of RCC Buildings Feb 21.pptx
The document discusses rehabilitation of reinforced concrete buildings and some common issues. It notes that concrete structures sometimes fail prematurely due to deficiencies in design, materials, construction practices, or harsh environments. Periodic inspections are often lacking. Common defects include cracking, corrosion of reinforcement, and deterioration from carbonation or chlorides. Proper repair requires understanding the root causes of damage and using compatible materials and good workmanship. The longevity of repairs depends on adequately addressing the original deterioration mechanisms.
Precast Concrete is the most prominent structure
Here are the key steps in concrete frame construction:
1. Excavation and foundation work - This involves excavating the land and laying the foundation system such as raft or pile foundations.
2. Erection of formwork - Formwork is erected to give shape to the concrete elements like columns, beams, slabs, etc. It is designed to bear the pressure of wet concrete.
3. Reinforcement cage - Steel reinforcement bars are cut, bent and assembled into cages and placed accurately in position in the formwork.
4. Concreting - Concrete is poured, compacted and finished after placing the reinforcement cages in position.
5. Curing - After concreting, the concrete elements
Technibus general
TechNibus is a global leader in metal enclosed bus systems that has operated for over 50 years. They manufacture isolated phase, non-segregated, and segregated phase bus systems at their 150,000 square foot facility in Canton, Ohio. TechNibus serves various industries including power generation, distribution, and data centers. They are committed to ISO 9001 quality certification and focus on innovative designs that reduce installation time and costs.
DWS
The document discusses diamond wire saws and their use in efficient underwater cutting for offshore decommissioning projects. It provides an overview of Mactech, a leader in underwater cutting technologies, and their various diamond wire saw models ranging from 4 to 102 inches. The saws can cut through materials like pipelines, structures, and shipwrecks. Articulating diamond wire saws are highlighted as having advantages like minimizing excavation needs and deck space due to their compact, articulating design.
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UAIPD 17-0041
This document describes a new method for forming molybdenum sulfide (MoSx) catalyst films onto conductive or semiconductor substrates for use in alternative energy applications. The method uses a spray coating technique to apply a thin MoSx film in a low-cost, energy-efficient manner. This allows the coated substrates, such as copper oxide, to catalyze reactions like water splitting with the potential to use solar power. The inventors are from the University of Alabama and Tulane University and aim to develop cheaper catalysts than precious metals like platinum currently used.
UAIPD 16-0022
This document summarizes a new gas treating technology using glycerol derivatives as solvents. The technology utilizes glycerol derivatives that have lower viscosity than current solvents, making them suitable for use in hollow fiber membrane contactors. The glycerol derivatives selectively absorb contaminants like CO2 and H2S from gas streams while allowing CH4 to pass through. This new solvent performs better than existing Selexol solvents and can be recycled. The hollow fiber membrane contactor provides advantages over conventional gas scrubbing like lower capital and operating costs due to its compact size and ability to achieve mass transfer without fluid dispersion.
UAIPD 17-0042
This document describes a new ruthenium-based catalyst that can convert carbon dioxide into carbon monoxide. The ruthenium and pyridine ring in the catalyst increase the selectivity of the photocatalytic reaction. Using triethylamine also improves the reaction. The catalyst allows for near 100% selectivity of carbon monoxide, is highly efficient so it can be used to synthesize fuels and chemicals, and requires less power than previous methods. It is also very stable and can be reused for multiple reactions.
Presentation UAIPD 15-0013
This document describes a new multi-piezoelectric microcantilever technology that improves scanning probe microscopy. It uses multiple piezoelectric materials attached to a microcantilever to sense its deflection without a laser, and a consensus algorithm to provide the most accurate estimation. This novel combination increases scanning probe microscope accuracy and enables operation even if some piezoelectric sensors fail. The technology was invented by Dr. Nima Mahmoodi from the University of Alabama Mechanical Engineering department.
Presentation UAPID 16-0049
This document describes an educational research kit that uses CRISPR-Cas10 gene editing technology. The kit allows students to explore gene transfer between phages, which is currently not well understood. It leverages the accessibility of CRISPR to enable high school, college, and graduate students to learn about gene editing and DNA analysis of bacteria. The technology was successfully piloted and demonstrates that CRISPR research can be made accessible through an educational kit. The kit was invented by Dr. Asma Hatoum, an assistant professor of biological sciences.
Presentation UAIPD 13-0018
The document describes a new method for analyzing biomolecules using iron oxide nanoparticles with surface capping molecules as matrix-assisted laser desorption/ionization (MALDI) matrices. The nanoparticles have a non-crystalline structure that increases control over matrix construction and reduces self-clustering. Preliminary data shows the nanoparticle matrices allow for selective ionization of target analytes like glycans from mixtures and tissue samples.
Presentation UAIPD # 15-0023
This document describes a proposed vehicle occupant detection and warning device invented by Tim Haskew. The device would measure CO2 levels and temperature inside a vehicle to detect if a child or pet is present without relying on active sensors. It would plug into a vehicle's existing power and use accelerometers and power sensors to detect if the vehicle is parked. If dangerous conditions are detected, it would trigger alarms, open windows, unlock doors, and alert vehicle owners. The technology provides passive detection of occupants and aims to save lives without the inconsistent results of current active sensor products.
Presentation UAPID #17-0007
UAIPD #17-0007
Nanogated Nanochannel Device (for Gene Detection and Screening) and the Method of Making Therof
Presentation UAIPD 17-0031
This document describes a new method for enhancing feedstock powder for cold gas dynamic spray deposition. The two-step process of heating and rapid quenching improves powder quality by reducing undesirable microstructures. This doubles the deposition efficiency compared to existing technologies. The new process removes microstructures that form during atomization, resulting in superior adhesion, strength, and corrosion resistance over as-received powders.
UAIPD 15-0013
This document summarizes a new technology for improving scanning probe microscopes. The technology uses a microcantilever with multiple piezoelectric sensors attached to measure deflection. A consensus algorithm analyzes the sensors to provide the most accurate measurement of deflection. This eliminates the need for an expensive laser positioning system and allows operation even if a sensor fails. The technology was invented by Dr. Nima Mahmoodi to increase the accuracy of scanning probe microscopes.
UAIPD 15-0011
UAIPD 15-0011 describes Dr. Yang-Ki Hong's invention of a GHz magnetic chip inductor with high magnetic loss. The inductor uses both air-core and magnetic-core materials, with a center magnetic bar surrounded by coils and top/bottom magnetic slabs enclosing an air-core inside. This combination realizes simultaneously high inductance, high Q factor, and high self-resonant frequency by reducing core loss. The technology outperforms conventional air-core and magnetic-core inductors.
UAIPD 15-0003
Dr. Jinhui Song has developed a new Fully Flexible Nanoelectronics technology called the Nanoelectronic Image System (NEIS). The NEIS uses vertically aligned, high-density optoelectronic nanowire clusters that function similar to a human retina to create flexible, transparent photo-sensing pixels. These pixels can be interconnected onto curvilinear surfaces, allowing the NEIS to transform its shape while maintaining its imaging capabilities. The NEIS offers advantages over existing rigid image sensor technologies by circumventing limitations of pixel size and rigidity through its ultra-flexible, biomimetic design.
UAIPD 14-0054
This document describes a technology for incorporating electronic components into 3D printed objects. It discusses how current 3D printing uses non-conductive materials, limiting electronic integration. The technology embeds an electronic module during printing and pauses fabrication for insertion. This allows automatic placement of electronics without geometry simplification. The inventor is Dr. Hwan-Sik Yoon from the Mechanical Engineering department, with the goal of enabling a greater variety of customizable electronic products.
UAIPD 14-0052
This document describes a technology for high Q factor integrated magnetic inductors. It discusses current problems with conventional magnetic inductors having low Q factors due to magnetic loss. The technology uses exchange-coupled two-phase hard and soft magnetic composites to form integrated inductors with coils, magnetic films, and substrates. This improves dynamic properties and permeability while minimizing magnetic loss, increasing inductance and Q factor by over 20% at frequencies of interest.
UAIPD 14-0049
Dr. Jason Bara has developed a novel class of ionic polyimide polymers that allow for greater tunability and control over the material's properties. Introducing ionic groups into the polymer chain enables over 20,000 possible materials with customizable chemical, conductive, and mechanical qualities. The production process is straightforward and low-cost, allowing for a wide range of applications like coatings, membranes, 3D printing, and more.
UAIPD 14-0039
The document describes a novel method developed by Dr. Jialai Wang to use carbon dioxide in concrete production in order to increase strength and durability while reducing the environmental impact. Current concrete production releases significant amounts of carbon dioxide during the cement production process. The proposed technology utilizes carbon dioxide as an admixture in a two-step mixing process for concrete that can be used for both precast and in-situ applications.
UAIPD 14-0034
This document describes an invention for remotely assessing helmet collision impacts using sound. It aims to address current problems with diagnosing concussions by utilizing a microphone array on helmets to measure impact sounds and determine collision parameters like force and location in real-time, without expensive sensors or player-worn equipment. The inventor, Dr. W. Steve Shepard Jr., is a professor at the University of Alabama with expertise in mechanical engineering and vehicle safety technologies.
UAIPD 14-0027
The document describes an invention for a shutoff algorithm for portable gasoline generators. The algorithm utilizes oxygen sensor data from the engine control system to shut off the generator if oxygen levels fall below a preset lower limit, eliminating unsafe carbon monoxide levels. Nearly 600 CO deaths have been reported involving generators between 1999-2010. The algorithm provides a more reliable shutoff method than traditional CO sensors by using existing oxygen sensor data from the engine. The inventors are Dr. Tim Haskew and Dr. Paul Puzinauskas from the University of Alabama.
UAIPD 14-0022
This document describes a new photon-effect transistor (PET) device that can both sense light signals and amplify electrical signals in a single simple unit. The PET uses a photosensitive semiconducting material as its gate, allowing it to perform the functions of a photo-detector diode and transistor. This simpler single-component design reduces noise, increases resolution and sensitivity, and allows for smaller pixel sizes compared to current multi-component image sensor technologies. The PET was invented by Dr. Jinhui Song, an Assistant Professor in the Department of Metallurgical and Materials Engineering at the University of Alabama.
UAIPD 14-0012
Dr. Silas Blackstock has developed a new approach called redox-auxiliary (RA) catalysis that appends a redox unit to a reaction site to trigger electron transfer and chemical reactions electronically. This new technology allows reactions to occur at lower temperatures without requiring products to be stronger oxidants than reactants. It also makes RA reactions triggerable electronically. Dr. Blackstock, a professor with over 50 publications, is the inventor of this new redox-auxiliary catalysis technology being developed at the University of Alabama.
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Recently uploaded
Randomised Optimisation Algorithms in DAPHNE
Slides from talk:
Aleš Zamuda: Randomised Optimisation Algorithms in DAPHNE .
Austrian-Slovenian HPC Meeting 2024 – ASHPC24, Seeblickhotel Grundlsee in Austria, 10–13 June 2024
https://ashpc.eu/
Applied Science: Thermodynamics, Laws & Methodology.pdf
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
Perhaps most importantly, Thermodynamics rapidly became a primary tool in the advance of applied science/engineering/technology, spanning micro-tech, to aerospace and cosmology. I can think of no better a story to illustrate the breadth of scientific methodologies and applications at their best.
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.Compexometric titration/Chelatorphy titration/chelating titration
Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.
The binding of cosmological structures by massless topological defects
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
11.1 Role of physical biological in deterioration of grains.pdf
Storagedeteriorationisanyformoflossinquantityandqualityofbio-materials.
Themajorcausesofdeteriorationinstorage
•Physical
•Biological
•Mechanical
•Chemical
Storageonlypreservesquality.Itneverimprovesquality.
Itisadvisabletostartstoragewithqualityfoodproduct.Productwithinitialpoorqualityquicklydepreciates
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Wereport the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifrequency observing campaign was set up to search for such a signature of the impact based on a prediction made 8 yr earlier. The first I-band results of the flare have already been reported by Kishore et al. (2024). Here we combine these data with our monitoring in the R-band. There is a big change in the R–I spectral index by 1.0 ±0.1 between the normal background and the flare, suggesting a new component of radiation. The polarization variation during the rise of the flare suggests the same. The limits on the source size place it most reasonably in the jet of the secondary BH. We then ask why we have not seen this phenomenon before. We show that OJ287 was never before observed with sufficient sensitivity on the night when the flare should have happened according to the binary model. We also study the probability that this flare is just an oversized example of intraday variability using the Krakow data set of intense monitoring between 2015 and 2023. We find that the occurrence of a flare of this size and rapidity is unlikely. In machine-readable Tables 1 and 2, we give the full orbit-linked historical light curve of OJ287 as well as the dense monitoring sample of Krakow.
Direct Seeded Rice - Climate Smart Agriculture
Direct Seeded Rice - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
Authoring a personal GPT for your research and practice: How we created the Q...
Thematic analysis in qualitative research is a time-consuming and systematic task, typically done using teams. Team members must ground their activities on common understandings of the major concepts underlying the thematic analysis, and define criteria for its development. However, conceptual misunderstandings, equivocations, and lack of adherence to criteria are challenges to the quality and speed of this process. Given the distributed and uncertain nature of this process, we wondered if the tasks in thematic analysis could be supported by readily available artificial intelligence chatbots. Our early efforts point to potential benefits: not just saving time in the coding process but better adherence to criteria and grounding, by increasing triangulation between humans and artificial intelligence. This tutorial will provide a description and demonstration of the process we followed, as two academic researchers, to develop a custom ChatGPT to assist with qualitative coding in the thematic data analysis process of immersive learning accounts in a survey of the academic literature: QUAL-E Immersive Learning Thematic Analysis Helper. In the hands-on time, participants will try out QUAL-E and develop their ideas for their own qualitative coding ChatGPT. Participants that have the paid ChatGPT Plus subscription can create a draft of their assistants. The organizers will provide course materials and slide deck that participants will be able to utilize to continue development of their custom GPT. The paid subscription to ChatGPT Plus is not required to participate in this workshop, just for trying out personal GPTs during it.
Discovery of An Apparent Red, High-Velocity Type Ia Supernova at 𝐳 = 2.9 wi...
We present the JWST discovery of SN 2023adsy, a transient object located in a host galaxy JADES-GS
+
53.13485
−
27.82088
with a host spectroscopic redshift of
2.903
±
0.007
. The transient was identified in deep James Webb Space Telescope (JWST)/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and spectroscopic followup with NIRCam and NIRSpec, respectively, confirm the redshift and yield UV-NIR light-curve, NIR color, and spectroscopic information all consistent with a Type Ia classification. Despite its classification as a likely SN Ia, SN 2023adsy is both fairly red (
�
(
�
−
�
)
∼
0.9
) despite a host galaxy with low-extinction and has a high Ca II velocity (
19
,
000
±
2
,
000
km/s) compared to the general population of SNe Ia. While these characteristics are consistent with some Ca-rich SNe Ia, particularly SN 2016hnk, SN 2023adsy is intrinsically brighter than the low-
�
Ca-rich population. Although such an object is too red for any low-
�
cosmological sample, we apply a fiducial standardization approach to SN 2023adsy and find that the SN 2023adsy luminosity distance measurement is in excellent agreement (
≲
1
�
) with
Λ
CDM. Therefore unlike low-
�
Ca-rich SNe Ia, SN 2023adsy is standardizable and gives no indication that SN Ia standardized luminosities change significantly with redshift. A larger sample of distant SNe Ia is required to determine if SN Ia population characteristics at high-
�
truly diverge from their low-
�
counterparts, and to confirm that standardized luminosities nevertheless remain constant with redshift.
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Ozturkcan, S., Berndt, A., & Angelakis, A. (2024). Mending clothing to support sustainable fashion. Presented at the 31st Annual Conference by the Consortium for International Marketing Research (CIMaR), 10-13 Jun 2024, University of Gävle, Sweden.
Travis Hills of MN is Making Clean Water Accessible to All Through High Flux ...
By harnessing the power of High Flux Vacuum Membrane Distillation, Travis Hills from MN envisions a future where clean and safe drinking water is accessible to all, regardless of geographical location or economic status.
Gadgets for management of stored product pests_Dr.UPR.pdf
Insectsplayamajorroleinthedeteriorationoffoodgrainscausingbothquantitativeandqualitativelosses
Wellprovedthatnogranariescanbefilledwithgrainswithoutinsectsastheharvestedproducecontainegg(or)larvae(or)pupae(or)adultinsectinthembecauseoffieldcarryoverinfestationwhichcannotbeavoidedindevelopingcountrieslikeIndia
Simpletechnologiesfortimelydetectionofinsectsinthestoredproduceandtherebyplantimelycontrolmeasures
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
The debris of the ‘last major merger’ is dynamically young
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
Recently uploaded (20)
Applied Science: Thermodynamics, Laws & Methodology.pdf
Applied Science: Thermodynamics, Laws & Methodology.pdf
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
Compexometric titration/Chelatorphy titration/chelating titration
Compexometric titration/Chelatorphy titration/chelating titration
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
11.1 Role of physical biological in deterioration of grains.pdf
11.1 Role of physical biological in deterioration of grains.pdf
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Juaristi, Jon. - El canon espanol. El legado de la cultura española a la civi...
Juaristi, Jon. - El canon espanol. El legado de la cultura española a la civi...
Authoring a personal GPT for your research and practice: How we created the Q...
Authoring a personal GPT for your research and practice: How we created the Q...
Discovery of An Apparent Red, High-Velocity Type Ia Supernova at 𝐳 = 2.9 wi...
Discovery of An Apparent Red, High-Velocity Type Ia Supernova at 𝐳 = 2.9 wi...
Tissue fluids_etiology_volume regulation_pressure.pptx
Tissue fluids_etiology_volume regulation_pressure.pptx
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Travis Hills of MN is Making Clean Water Accessible to All Through High Flux ...
Travis Hills of MN is Making Clean Water Accessible to All Through High Flux ...
Gadgets for management of stored product pests_Dr.UPR.pdf
Gadgets for management of stored product pests_Dr.UPR.pdf
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
The debris of the ‘last major merger’ is dynamically young
The debris of the ‘last major merger’ is dynamically young
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
UAIPD 09-0027
- 1. 09-0027 “Low stressed functional diamond film” Inventor: Dr. Kevin Chou
- 2. • Drills are critical to productivity and part quality in the manufacturing process. – Most widely used are cobalt-cemented tungsten (Co- WC) carbide twist drills • Diamond coatings are used to extend tool life due to high hardness and low friction. – BUT these coatings suffer from adhesion problems, residual stresses, and have a thickness threshold. Current Problems
- 3. • Method of drill design that lowers the stress of diamond coating on twist drill. – Achieved by perfecting the geometry of drill design on both the macro and micro level. • Decreases delamination of coating by reducing the amount of stress. Technology
- 4. • Easy fabrication that utilizes geometry modification to reduce stress. • Proven advantages through rigorous engineering analysis Advantages Drill life,# of holes Comment 40 Drill breakage >100 No drill breakage, testing stop for drill evaluation Engineered edge Original edge
- 5. • Dr. Kevin Chou – Professor – 27 Publications • Departments – Center for Advanced Vehicle Technologies – Mechanical Engineering Inventor kchou@eng.ua.edu
- 6. Office for Technology Transfer 720 2nd Ct E Tuscaloosa, AL 35401 UAIPD09-0027 OTT@UA.edu www.OTT.UA.edu