We’ve thoroughly enjoyed testing NEMO’s new Tensor Insulated Sleeping Pad on recent camping and backpacking trips in the Pacific Northwest. Tensor is a generalization of scalars and vectors. The sack locks onto the Tensor Insulated’s valve and you inflate the pad by forcing air from the sack into it. (Bigger but packs as small – nice!) If a tensor has magnitude and two directions (i.e., rank 2 tensor), then it is called dyad. NEMO bundles a 2.0-ounce Vortex inflation sack with many of their sleeping pads, including the Tensor Insulated. This is actually part of the formula for calculating the distance between two vectors in Poincarè ball space model (more on coming post!). $111.73. 4.2 out of 5 stars 5. Some more info, I'm 5'11, side and stomach sleeper, and would like to use the pad for shoulder seasons. The expansion in orthonormal basis is mathematically simple. it’s about the same weight as my Thermarest ProLite summer pad AND it packs down at least as small. I’m a cold sleeper and need some advice to choose the best one for all season use. Page 1 of 1 Start over Page 1 of 1 . Specs. Next page. If both arguments are 2-dimensional, the matrix-matrix product is returned. Customers also viewed these products. The Nemo Tensor Alpine Valve has two modes: inflation and deflation. 4.7 out of 5 stars 18. It takes about 30 seconds and 20 breaths to fill the 3-inch-thick pad. A vector can be viewed as the tensor product of a set of basis vectors. See tensor as - collection of vectors fiber - collection of matrices slices - large matrix, unfolding ( ) i 1 i 2. i. If a tensor has magnitude and one direction (i.e., rank 1 tensor), then it is called vector. The tensor product of two vectors represents a dyad, which is a linear vector transformation. What Are Quaternions? Quaternions could be viewed as the outer tensor product of a scalar and a 3-vector. 1. i. The tensor product is not commutative. Nemo tensor insulated vs Nemo tensor Alpine. Under rotation for an event in spacetime represented by a quaternion, time is unchanged, but the 3-vector for space would be rotated. $174.95. Temperatures ranged from 50F down to about 35F. Furthermore a scalar a tensor of rank 0. Eula Salinas Outdoor Gear July 27th, 2020 - 17:29:57. Therm-a-Rest NeoAir Ultralight Backpacking Air Xlite Mattress Valve x Inches. Expressions for lengths, areas and volumes of objects in the vector space can then be given in terms of tensors with covariant and contravariant indices. It’s comfortable but haven’t got the pressure just right. A vector is a tensor of order or rank one , and a vector field is a tensor field of order one . Definition 7.1 (Tensor product of vectors). Nemo Tensor 20R. NeoAir Xlite vs Nemo Tensor Insulated. I’m leaning to the NEMO Tensor but in a 25R rectangular version (25″ wide and 5 oz. Mode-1 fibers, X:,j,k: 3 6 9 12 15 18 21 24 2 5 8 11 14 17 20 23 1 4 7 10 13 16 19 22 . Nemo Tensor Alpine Vs Thermarest Xtherm Switchback Insulated Xlite Pillow Z Lite Fillo Neoair. I don’t have the money atm to buy multiple pads. It reduces the effort of inflating the Tensor Insulated Short Mummy from 21 breaths down to 3-4 bagfuls of air and is a nice luxury item to bring on a trip. Tensor Insulated Sleeping Pad (196) 196 reviews with an average rating of 4.2 out of 5 stars. If x,y are vectors of length M and N,respectively,theirtensorproductx⊗y is defined as the M×N-matrix defined by (x⊗y) ij = x i y j. 3 A = A. Therm-a-Rest. NEMO is updating the pad in 2019 with a redesigned flat valve, which looks to be much more functional than the previous valve. They offer a great balance of weight and warmth for a rectangular sleeping pad and won’t cost you an arm and a leg. At 1 lb. A {i 1 i 2}i 3 j 1. i. Coupled with the Nemo Tango Solo, the pair makes an excellent sleep system for weather below 50F. Question. They describe geometric relation between scalar-scalar,scalar-vector,vector-vector and even other tensors. II) The tensor object and physics. Because of the nature of the problem, I needed to calculate the formula for each couple of vector. 4 oz. NEMO. $169.95 NEMO Astro Insulated Lite Sleeping Pad. I've been searching for an UL pad for a few weeks now (replacing my 80's Thermarest 3/4) and I'm torn between the thermarest Xlite (large size, 1.0lbs) and the nemo tensor insulated (RW, 1.4lbs). Some additional mathematical details. All microprocessors are designed to carry out arithmetic and logical operations. 3 6 9. The well stablish physics, in general, deals with spacetime (like Newtonian physics), and the theory of spacetime is geometry. 12 15 18 21 24 2 5 8 11 14 17 20 23 1 4 7 10 13 16 19 22. 12oz. I have tested the combination of the Tensor and Tango, with my Borah Bivy and an Exped Multi-Mat several times in my backyard, and for two nights during a recent camping trip. torch.mean (input, dim, keepdim=False, *, out=None) → Tensor Returns the mean value of each row of the input tensor in the given dimension dim.If dim is a list of dimensions, reduce over all of them.. I would just buy the Alpine but is unavailable on most sites right now and it’s more expensive than the tensor insulated. Also grabbed a long wide exped synmat UL winter. 13oz. 2. i. The Tensor Alpine is a fairly firm pad as air mattresses go, but you can bleed off air to soften it up. Matrices are two-dimensional structures containing numbers, but a tensor is a multidimensional set of numbers. The behavior depends on the dimensionality of the tensors as follows: If both tensors are 1-dimensional, the dot product (scalar) is returned. A: 3 x 4 x 2 – tensor . Covariant and Contravariant Vectors Alok Kumar1 IISER, Bhopal ITI Campus (Gas Rahat) Building Govindpura, Bhopal - 23 India. Therm-A-Rest NeoAir Xlite. torch.matmul (input, other, *, out=None) → Tensor ¶ Matrix product of two tensors. Because it is often denoted without a symbol between the two vectors, it is also referred to as the open product. heavier) for shoulder season and winter use plus cold high mountain summer nights. Question. $126.73. It can be considered as an extension of a matrix. Compared to $149.95. To inflate the pad, you untwist and pull the nozzle out, then blow into the nozzle. Previous page. And a vector a tensor of rank 1. But a Tensor is not a generalization of scalars or vectors, but rather, scalars and vectors are a generalization of a tensor. The baffles run horizontally much like Therm-a-Rest’s Neoair sleeping pads but the cover fabric feels much more comfortable against your skin. Nemo Vector Backpacking Sleeping Pad - Insulated and Non-Insulated. Its main strengths are being thick, cushy, quiet, and very comfortable. Inflated Size: 72 x 20 x 3 in. Ainsi, vous pourrez l'utiliser jusqu'à des températures de-29°.Il reste cependant plutôt léger par rapport à sa technicité avec un poids de 475g pour le mummy. The NEMO Tensor Alpine pad is a great fit for someone looking for a cold-weather pad that doesn’t weigh a ton, is highly packable, provides full-night comfort, and is super-duper easy to inflate/deflate. MSRP $160. First night was too much and second night too low. In particular x ⊗ y is a matrix of rank 1, which means that most matrices cannot be written as tensor products. I have only slept on the Nemo so far, 2 nights. Starting with the tangent bundle (the bundle of tangent spaces) the whole apparatus explained at component-free treatment of tensors carries over in a routine way – again independently of coordinates, as mentioned in the introduction. In other words, x⊗y = xyT. Packed Size: 8 x 3 in. Le Tensor Alpine est un matelas d'alpinisme de la marque Nemo. In tensor analysis, a covariant vector varies more or less reciprocally to a corresponding contravariant vector. Télécharger des livres par Benjamin Cuq Date de sortie: November 21, 2018 Éditeur: E/P/A Nombre de pages: 252 pages NEMO. If keepdim is True, the output tensor is of the same size as input except in the dimension(s) dim where it is of size 1. 4.5 out of 5 stars 692. The NEMO Vector Insulated sleeping pad is available in Regular (72” x 20”) and Long Wide (76” x 25”). A manifold is the natural extension of a surface to higher dimensions , and to spaces more general than $\mathbb {R}^n$ . Having defined vectors and one-forms we can now define tensors. Compared to $169.95. NEMO Tensor Inflation, Insulation. Buying outdoor gear is usually a long term investment, so you should therefore buy for durability and substance over style. Ultra isolant, il est composé de tissu Polyester 20D associé à 3 films métallisés pour une isolation parfaite en température extrême. 3. a ( ) i. Vector Air Pad (1) 1 reviews with an average rating of 5.0 out of 5 stars. Well I ended up buying the long wide Nemo tensor alpine as well as the long wide comfort plus. Nemo’s line of Tensor sleeping pads have been around for a while, all sporting a lightweight 20D Polyester Ripstop fabric, options for insulation, and claimed weights between 385g and 540g depending on the length and width you choose. A dyad is a special tensor – to be discussed later –, which explains the name of this product. MSRP $120. We also appreciate that the Tensor is offered in various size and shape options, which makes it easy to find one that fits our bodies and backpacking styles the best. Recently, we tested Nemo’s Tensor 20R Mummy and came away excited about how comfortable it was, excepting that it was a bit narrow for the broad shouldered. Fibers . Since the tensor product concept is independent of any choice of basis, taking the tensor product of two vector bundles on M is routine. Abstract Vector is a physical quantity and it does not depend on any co-ordinate system. 16 . It need to be expanded in some basis for practical calculation and its components do depend on the chosen basis. Experience. Update: We tested the NEMO Tensor in 2017 (technically the Tensor 20R Mummy, which indicates the width, shape, and insulation of the pad). Spaceframe Baffles; 2 layers of Thermal Mirror suspended metalized film ; Insulated with aluminized film; Integrated foot pump; Premium 20 denier and 30 denier fabrics; Zero-profile, multi-functional, micro-adjustable valve; Specs. Tensor-Decomposition-Based Unsupervised Feature Extraction Applied to Prostate Cancer Multiomics Data Y-h. Taguchi 1,* and Turki Turki 2 1 Department of Physics, Chuo University, Tokyo 112-8551, Japan 2 Department of Computer Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; tturki@kau.edu.sa * Correspondence: tag@granular.com Received: 1 November 2020; Accepted: 7 … Tensors are more generalized vectors. $\mathbb {R}^n$ is a vector space representing the n-tuples of reals under component-wise addition and scalar multiplication . The weight-to-warmth ratio, along with its no-nonsense valve make for a pad that is welcome in almost any situation or condition. 3. Packed Size: 9 x 4 in. Where u and v are vectors of size 2, taken from a set of thousands vectors. The tensor product of two vectors will be a 2-rank tensor. Vector Air Pad - Long Wide (1) 1 reviews with an average rating of 5.0 out of 5 stars. Thus every tensor can be represented as a multidimensional array or vector, but not every vector can be represented as tensors. Nvidia’s Tensor Cores. 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