HB 2018-Filling the gaps in our soils data
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This document discusses filling gaps in soil data through excavating soil pits. It describes the disadvantages of pits but notes they provide unbiased estimates of nutrient stocks through direct measurements of bulk density, rock volume, and elemental concentrations. Field methods are outlined involving digging pits in specific locations and quantitatively sampling soil layers. A sequential extraction method is presented for analyzing various elements. Plans to complete an existing soil dataset by excavating additional pits in 2018 at different sites are described. The document solicits ideas for additional field measurements and invites joining a research network.
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Distinguishing N and P addition from the air using imaging spectroscopy. Alex...
Germinants: The next generation. Denise Rauschendorfer
Germinants: The next generation. Denise Rauschendorfer
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
Mycorrhizal type and co-limitation of forest productivity. Noah Blumenthal
Grow with the changes: Forest succession and woody debris. Joe Nash
Grow with the changes: Forest succession and woody debris. Joe Nash
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
Litterfall and soil respiration fluxes in the MELNHE study. Thomas Mann
N-P co-limitation in young northern hardwood forest. Tim Fahey
N-P co-limitation in young northern hardwood forest. Tim Fahey
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Fine dining: root morphology, mycorrhizal colonization, and nutrient amendmen...
Could co-limitation be caused by different nutrients limiting shoots and root...
Could co-limitation be caused by different nutrients limiting shoots and root...
Sugar maple leaf characteristics vary with depth in the crown and nutrient ad...
Sugar maple leaf characteristics vary with depth in the crown and nutrient ad...
The timing of senescence affects foliar p resorption dan hong
The timing of senescence affects foliar p resorption dan hong
Space wars the fight for light in the stands of bartlett sarah congress
Space wars the fight for light in the stands of bartlett sarah congress
Having a stake in nutrient cycling effects of n and p addition on wood decay...
Having a stake in nutrient cycling effects of n and p addition on wood decay...
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...
Fruiting response of ectomycorrhizal fungi to nutrient additions claudia vi...
Does the fate of n depend on p availability in soil - samuel butler
Does the fate of n depend on p availability in soil - samuel butler
Belowground c allocation estimated as soil respiration minus aboveground litt...
Belowground c allocation estimated as soil respiration minus aboveground litt...
Baby boomers are there any surviving germinants from the recent mast year -...
Baby boomers are there any surviving germinants from the recent mast year -...
And you thought there were no earthworms in our forests
And you thought there were no earthworms in our forests
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JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDS
The pathway(s) to seeding the massive black holes (MBHs) that exist at the heart of galaxies in the present and distant Universe remains an unsolved problem. Here we categorise, describe and quantitatively discuss the formation pathways of both light and heavy seeds. We emphasise that the most recent computational models suggest that rather than a bimodal-like mass spectrum between light and heavy seeds with light at one end and heavy at the other that instead a continuum exists. Light seeds being more ubiquitous and the heavier seeds becoming less and less abundant due the rarer environmental conditions required for their formation. We therefore examine the different mechanisms that give rise to different seed mass spectrums. We show how and why the mechanisms that produce the heaviest seeds are also among the rarest events in the Universe and are hence extremely unlikely to be the seeds for the vast majority of the MBH population. We quantify, within the limits of the current large uncertainties in the seeding processes, the expected number densities of the seed mass spectrum. We argue that light seeds must be at least 103 to 105 times more numerous than heavy seeds to explain the MBH population as a whole. Based on our current understanding of the seed population this makes heavy seeds (Mseed > 103 M⊙) a significantly more likely pathway given that heavy seeds have an abundance pattern than is close to and likely in excess of 10−4 compared to light seeds. Finally, we examine the current state-of-the-art in numerical calculations and recent observations and plot a path forward for near-future advances in both domains.
Reaching the age of Adolescence- Class 8
This is a presentation on understanding the age of adolescence.
Physics Investigatory Project on transformers. Class 12th
Physics investigatory project on transformers with required details for 12thes. with index, theory, types of transformers (with relevant images), procedure, sources of error, aim n apparatus along with bibliography🗃️📜. Please try to add your own imagination rather than just copy paste... Hope you all guys friends n juniors' like it. peace out✌🏻✌🏻
TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
Centrifugation is a powerful technique used in laboratories to separate components of a heterogeneous mixture based on their density. This process utilizes centrifugal force to rapidly spin samples, causing denser particles to migrate outward more quickly than lighter ones. As a result, distinct layers form within the sample tube, allowing for easy isolation and purification of target substances.
Signatures of wave erosion in Titan’s coasts
The shorelines of Titan’s hydrocarbon seas trace flooded erosional landforms such as river valleys; however, it isunclear whether coastal erosion has subsequently altered these shorelines. Spacecraft observations and theo-retical models suggest that wind may cause waves to form on Titan’s seas, potentially driving coastal erosion,but the observational evidence of waves is indirect, and the processes affecting shoreline evolution on Titanremain unknown. No widely accepted framework exists for using shoreline morphology to quantitatively dis-cern coastal erosion mechanisms, even on Earth, where the dominant mechanisms are known. We combinelandscape evolution models with measurements of shoreline shape on Earth to characterize how differentcoastal erosion mechanisms affect shoreline morphology. Applying this framework to Titan, we find that theshorelines of Titan’s seas are most consistent with flooded landscapes that subsequently have been eroded bywaves, rather than a uniform erosional process or no coastal erosion, particularly if wave growth saturates atfetch lengths of tens of kilometers.
一比一原版美国佩斯大学毕业证如何办理
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Anti-Universe And Emergent Gravity and the Dark Universe
Recent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. These ideas are best understood in Anti-de Sitter space, where they rely on the area law for entanglement entropy. The extension to de Sitter space requires taking into account the entropy and temperature associated with the cosmological horizon. Using insights from string theory, black hole physics and quantum information theory we argue that the positive dark energy leads to a thermal volume law contribution to the entropy that overtakes the area law precisely at the cosmological horizon. Due to the competition between area and volume law entanglement the microscopic de Sitter states do not thermalise at sub-Hubble scales: they exhibit memory effects in the form of an entropy displacement caused by matter. The emergent laws of gravity contain an additional ‘dark’ gravitational force describing the ‘elastic’ response due to the entropy displacement. We derive an estimate of the strength of this extra force in terms of the baryonic mass, Newton’s constant and the Hubble acceleration scale a0 = cH0, and provide evidence for the fact that this additional ‘dark gravity force’ explains the observed phenomena in galaxies and clusters currently attributed to dark matter.
Quality assurance B.pharm 6th semester BP606T UNIT 5
Warehousing
Good warehousing practices
Material management
Explainable Deepfake Image/Video Detection
Presentation of our paper, "Towards Quantitative Evaluation of Explainable AI Methods for Deepfake Detection", by K. Tsigos, E. Apostolidis, S. Baxevanakis, S. Papadopoulos, V. Mezaris. Presented at the ACM Int. Workshop on Multimedia AI against Disinformation (MAD’24) of the ACM Int. Conf. on Multimedia Retrieval (ICMR’24), Thailand, June 2024. https://doi.org/10.1145/3643491.3660292 https://arxiv.org/abs/2404.18649
Software available at https://github.com/IDT-ITI/XAI-Deepfakes
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
Discovery of Merging Twin Quasars at z=6.05
We report the discovery of two quasars at a redshift of z = 6.05 in the process of merging. They were
serendipitously discovered from the deep multiband imaging data collected by the Hyper Suprime-Cam (HSC)
Subaru Strategic Program survey. The quasars, HSC J121503.42−014858.7 (C1) and HSC J121503.55−014859.3
(C2), both have luminous (>1043 erg s−1
) Lyα emission with a clear broad component (full width at half
maximum >1000 km s−1
). The rest-frame ultraviolet (UV) absolute magnitudes are M1450 = − 23.106 ± 0.017
(C1) and −22.662 ± 0.024 (C2). Our crude estimates of the black hole masses provide log 8.1 0. ( ) M M BH = 3
in both sources. The two quasars are separated by 12 kpc in projected proper distance, bridged by a structure in the
rest-UV light suggesting that they are undergoing a merger. This pair is one of the most distant merging quasars
reported to date, providing crucial insight into galaxy and black hole build-up in the hierarchical structure
formation scenario. A companion paper will present the gas and dust properties captured by Atacama Large
Millimeter/submillimeter Array observations, which provide additional evidence for and detailed measurements of
the merger, and also demonstrate that the two sources are not gravitationally lensed images of a single quasar.
Unified Astronomy Thesaurus concepts: Double quasars (406); Quasars (1319); Reionization (1383); High-redshift
galaxies (734); Active galactic nuclei (16); Galaxy mergers (608); Supermassive black holes (1663)
22PH503 - Astronomy and Astrophysics - Unit 2 - Spectral Classification of Stars
Undergrad Physics - BSc Physics
Evaluation and Identification of J'BaFofi the Giant Spider of Congo and Moke...
ABSTRACT
The J'BaFofi, or "Giant Spider," is a mainly legendary arachnid by reportedly inhabiting the dense rain forests of
the Congo. As despite numerous anecdotal accounts and cultural references, the scientific validation remains more elusive.
My study aims to proper evaluate the existence of the J'BaFofi through the analysis of historical reports,indigenous
testimonies and modern exploration efforts.
Rodents, Birds and locust_Pests of crops.pdf
Mole rat or Lesser bandicoot rat, Bandicotabengalensis
•Head -round and broad muzzle
•Tail -shorter than head, body
•Prefers damp areas
•Burrows with scooped soil before entrance
•Potential rat, one pair can produce more than 800 offspringsin one year
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Nutaceuticsls herbal drug technology CVS, cancer.pptx
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acanthocytes_causes_etiology_clinical sognificance-future.pptx
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Physics Investigatory Project on transformers. Class 12th
Physics Investigatory Project on transformers. Class 12th
TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
Anti-Universe And Emergent Gravity and the Dark Universe
Anti-Universe And Emergent Gravity and the Dark Universe
Quality assurance B.pharm 6th semester BP606T UNIT 5
Quality assurance B.pharm 6th semester BP606T UNIT 5
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...
22PH503 - Astronomy and Astrophysics - Unit 2 - Spectral Classification of Stars
22PH503 - Astronomy and Astrophysics - Unit 2 - Spectral Classification of Stars
Evaluation and Identification of J'BaFofi the Giant Spider of Congo and Moke...
Evaluation and Identification of J'BaFofi the Giant Spider of Congo and Moke...
HB 2018-Filling the gaps in our soils data
- 1. Filling the Gaps in Our Soils Data: It’s the Pits Alexandrea Rice Committee: Ruth Yanai, Russell Briggs, and Matt Vadeboncoeur
- 2. Why Pits? •Disadvantages: •Labor intensive •Destructive •Fewer observations •Unbiased estimate nutrient stocks •Direct measurements of: •Bulk density •Rock volume •Elemental concentrations
- 3. Field Methods •Pit location • Away from trees • Few surface rocks • No recent disturbance • Frame sits securely to soil surface •Dig pits • Secure frames • Quantitative sampling: Oie, Oa, 0-10 cm, 10-30 cm, 30-50 cm, 50+ cm, C horizon
- 4. Sequential Extraction Method Volume Solution Temperature (˚C) Time Other 1. Exchangeable 5 mL 1 M NH4Cl at pH 7 20 20 hr Shaker table 2. Cold Nitric 5 mL 1 M HNO3 at pH 0 20 20 hr Shaker table 3. Hot Nitric 15 mL 1 M HNO3 at pH 0 200 20 min Microwave 20 MPa 4. HF Digest 8 mL 1 mL 1 mL HNO3 HCl HF 210 15 min Microwave 20 MPa Elements analyzed: Al, Ba, Ca, Fe, K, Mg, Mn, N, Na, P, Rb, Si, Sr, Ti, and Zn Slide adapted from Nezat 2005
- 5. Completing the Dataset (Summer 2018) Sites Stand Elevation (m) Bedrock Years Excavated (# plots sampled) Bartlett Experimental Forest C1 570 Mt. Osceola Granite 2004 (3), 2010 (1) C2 340 Conway Granite 2004 (3), 2010 (1) C6 460 Conway Granite 2004 (3), 2010 (1) C8 330 Mt. Osceola Granite 2004 (3), 2010 (1) C9 440 Conway Granite 2004 (3), 2010 (1) Jeffers Brook Experimental Forest JBM 730 Amphibolite 2010 (4) JBO 730 Amphibolite 2010 (4) Hubbard Brook Experimental Forest HBM 500 Rangeley Schist 2018 (4) HBO 500 Rangeley Schist 2018 (4) Data used in: Blum et al. 2007 Nazet et al. 2007; Nazet et al. 2008; Schaller et al. 2008; Schaller et al. 2010; Lucash et al. 2012; Vadeboncoeur et al. 2012; Vadeboncoeur et al. 2014;
- 6. Tree inventory, diameter growth, productivity Litter production and species composition Nutrient resorption from senescing leaves Root biomass and production Root proliferation in nutrient-amended cores Soil respiration and belowground C allocation Carbon and nutrient storage in soils Enzyme activity, soil nutrient availability Mycorrhizal infection and species composition Soil fungi in nutrient-amended cores Mineral weathering and rare earth elements Seedlings, regeneration, herbs Sap flow (transpiration) Ideas for Field Measurements? Join MELNHE: http://www.esf.edu/melnhe/
Editor's Notes
- we sequentially digested Two types of soil samples: The samples were leached w/ 1M NH4Cl to remove the exchangeable fraction, then w/ 1M HNO3 to remove the easily dissolved minerals. The easily-weathered silicates were dissolved with 1M HNO3 at 200 C. The remaining silicates were dissolved with a combination of conc HNO3, HF, HCl which I’ll refer to as the HF digest.
- Use to explain variations Soil Respiration Litter production and chemistry Decomposition rate N mineralization Bedrock type Growth responses
- Need to update this list