At 1 lb. It’s comfortable but haven’t got the pressure just right. NEMO Tensor Inflation, Insulation. They offer a great balance of weight and warmth for a rectangular sleeping pad and won’t cost you an arm and a leg. 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. Previous page. The weight-to-warmth ratio, along with its no-nonsense valve make for a pad that is welcome in almost any situation or condition. In tensor analysis, a covariant vector varies more or less reciprocally to a corresponding contravariant vector. Page 1 of 1 Start over Page 1 of 1 . I would just buy the Alpine but is unavailable on most sites right now and it’s more expensive than the tensor insulated. Quaternions could be viewed as the outer tensor product of a scalar and a 3-vector. Nemo Tensor 20R. $111.73. 12oz. NEMO bundles a 2.0-ounce Vortex inflation sack with many of their sleeping pads, including the Tensor Insulated. Compared to $149.95. 1. i. 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). To inflate the pad, you untwist and pull the nozzle out, then blow into the nozzle. In other words, x⊗y = xyT. 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. Under rotation for an event in spacetime represented by a quaternion, time is unchanged, but the 3-vector for space would be rotated. The expansion in orthonormal basis is mathematically simple. 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. If a tensor has magnitude and one direction (i.e., rank 1 tensor), then it is called vector. Vector Air Pad (1) 1 reviews with an average rating of 5.0 out of 5 stars. A vector can be viewed as the tensor product of a set of basis vectors. A manifold is the natural extension of a surface to higher dimensions , and to spaces more general than $\mathbb {R}^n$ . Buying outdoor gear is usually a long term investment, so you should therefore buy for durability and substance over style. Specs. The pad is a tad lighter, includes a pump sack, and has a slightly more refined look. II) The tensor object and physics. 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. The NEMO Vector Insulated sleeping pad is available in Regular (72” x 20”) and Long Wide (76” x 25”). So, in order to really apply the tensor theory in physics first we have to give the geometry of physics. In particular x ⊗ y is a matrix of rank 1, which means that most matrices cannot be written as tensor products. Its main strengths are being thick, cushy, quiet, and very comfortable. Because of the nature of the problem, I needed to calculate the formula for each couple of vector. I’m leaning to the NEMO Tensor but in a 25R rectangular version (25″ wide and 5 oz. 4.2 out of 5 stars 5. 12 15 18 21 24 2 5 8 11 14 17 20 23 1 4 7 10 13 16 19 22. If both arguments are 2-dimensional, the matrix-matrix product is returned. The baffles run horizontally much like Therm-a-Rest’s Neoair sleeping pads but the cover fabric feels much more comfortable against your skin. torch.matmul (input, other, *, out=None) → Tensor ¶ Matrix product of two tensors. Next page. A tensor of rank (m,n), also called a (m,n) tensor, is defined to be a scalar function of mone-forms and nvectors that is linear in all of its arguments. Some additional mathematical details. Question. MSRP $120. If a tensor has magnitude and two directions (i.e., rank 2 tensor), then it is called dyad. Fibers . Vector Air Pad - Long Wide (1) 1 reviews with an average rating of 5.0 out of 5 stars. Covariant and Contravariant Vectors Alok Kumar1 IISER, Bhopal ITI Campus (Gas Rahat) Building Govindpura, Bhopal - 23 India. Specs. I have only slept on the Nemo so far, 2 nights. I’m a cold sleeper and need some advice to choose the best one for all season use. 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. $\mathbb {R}^n$ is a vector space representing the n-tuples of reals under component-wise addition and scalar multiplication . The behavior depends on the dimensionality of the tensors as follows: If both tensors are 1-dimensional, the dot product (scalar) is returned. Customers also viewed these products. The tensor product of two vectors represents a dyad, which is a linear vector transformation. 4 oz. The well stablish physics, in general, deals with spacetime (like Newtonian physics), and the theory of spacetime is geometry. 3. a ( ) i. $169.95 NEMO Astro Insulated Lite Sleeping Pad. 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. 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. Inflated Size: 72 x 20 x 3 in. Nemo tensor insulated vs Nemo tensor Alpine. 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. Compared to $169.95. This is actually part of the formula for calculating the distance between two vectors in Poincarè ball space model (more on coming post!). They describe geometric relation between scalar-scalar,scalar-vector,vector-vector and even other tensors. 3 A = A. Because it is often denoted without a symbol between the two vectors, it is also referred to as the open product. 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; [email protected] * Correspondence: [email protected] Received: 1 November 2020; Accepted: 7 … I don’t have the money atm to buy multiple pads. Well I ended up buying the long wide Nemo tensor alpine as well as the long wide comfort plus. Coupled with the Nemo Tango Solo, the pair makes an excellent sleep system for weather below 50F. Having defined vectors and one-forms we can now define tensors. Packed Size: 8 x 3 in. But a Tensor is not a generalization of scalars or vectors, but rather, scalars and vectors are a generalization of a tensor. Some more info, I'm 5'11, side and stomach sleeper, and would like to use the pad for shoulder seasons. 4.5 out of 5 stars 692. Temperatures ranged from 50F down to about 35F. It need to be expanded in some basis for practical calculation and its components do depend on the chosen basis. Therm-A-Rest NeoAir Xlite. 2. i. A {i 1 i 2}i 3 j 1. i. 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 . Also grabbed a long wide exped synmat UL winter. Tensors are more generalized vectors. NEMO is updating the pad in 2019 with a redesigned flat valve, which looks to be much more functional than the previous valve. It can be considered as an extension of a matrix. A dyad is a special tensor – to be discussed later –, which explains the name of this product. Matrices are two-dimensional structures containing numbers, but a tensor is a multidimensional set of numbers. First night was too much and second night too low. Thus every tensor can be represented as a multidimensional array or vector, but not every vector can be represented as tensors. And a vector a tensor of rank 1. Nemo Tensor Alpine Vs Thermarest Xtherm Switchback Insulated Xlite Pillow Z Lite Fillo Neoair. it’s about the same weight as my Thermarest ProLite summer pad AND it packs down at least as small. 13oz. Ultra isolant, il est composé de tissu Polyester 20D associé à 3 films métallisés pour une isolation parfaite en température extrême. Tensor is a generalization of scalars and vectors. Experience. The sack locks onto the Tensor Insulated’s valve and you inflate the pad by forcing air from the sack into it. See tensor as - collection of vectors fiber - collection of matrices slices - large matrix, unfolding ( ) i 1 i 2. i. 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. Inflated Size: 72 x 20 x 2.5in. Since the tensor product concept is independent of any choice of basis, taking the tensor product of two vector bundles on M is routine. Question. The tensor product is not commutative. $126.73. Abstract Vector is a physical quantity and it does not depend on any co-ordinate system. A: 3 x 4 x 2 – tensor . Furthermore a scalar a tensor of rank 0. The Tensor Alpine is a fairly firm pad as air mattresses go, but you can bleed off air to soften it up. $174.95. Packed Size: 9 x 4 in. Where u and v are vectors of size 2, taken from a set of thousands vectors. 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.. 3. We’ve thoroughly enjoyed testing NEMO’s new Tensor Insulated Sleeping Pad on recent camping and backpacking trips in the Pacific Northwest. 3 6 9. Nvidia’s Tensor Cores. Le Tensor Alpine est un matelas d'alpinisme de la marque Nemo. What Are Quaternions? The tensor product of two vectors will be a 2-rank tensor. Eula Salinas Outdoor Gear July 27th, 2020 - 17:29:57. 16 . Therm-a-Rest NeoAir Ultralight Backpacking Air Xlite Mattress Valve x Inches. The Nemo Tensor Alpine Valve has two modes: inflation and deflation. Nemo Vector Backpacking Sleeping Pad - Insulated and Non-Insulated. heavier) for shoulder season and winter use plus cold high mountain summer nights. NEMO. It takes about 30 seconds and 20 breaths to fill the 3-inch-thick pad. 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. MSRP $160. Therm-a-Rest. A vector is a tensor of order or rank one , and a vector field is a tensor field of order one . NEMO. Update: We tested the NEMO Tensor in 2017 (technically the Tensor 20R Mummy, which indicates the width, shape, and insulation of the pad). All microprocessors are designed to carry out arithmetic and logical operations. 4.7 out of 5 stars 18. Télécharger des livres par Benjamin Cuq Date de sortie: November 21, 2018 Éditeur: E/P/A Nombre de pages: 252 pages 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. Definition 7.1 (Tensor product of vectors). 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