Cone structures

Cones come in many forms, from the soft, red berry-like structure of the yew, which produces only one seed, to the hard scaly spiral structure found on pines ( Pinus spp.), which produces many seeds. As a group, pine trees produce similar cones, yet there is enough difference between species to identify the type of tree by the cone.

Eye cones are an essential part of the eye’s structure and enable proper vision. Problems with your eye cones can lead to distorted vision ... Structure of Eye Cones . These light-sensitive cones are mostly concentrated into a portion of the eye's retina known as the fovea, which enables small details to come into sharp focus in bright …Purpose: This study used cone-beam computed tomography (CBCT) to analyze the prevalence of several maxillary anatomical/accessory structures, as well as variations within each type, assessing how accurate diagnosis can minimize the risk of intraoperative complications during implantological procedures in the oral cavity. Methods: 212 CBCT scans of the maxilla were analyzed, captured over a ...pollen cones of cycads are similar to seed cones, and pollen is born on the lower surface of scale-like structures. It is generally believed that in the ancestral type, cycads bore ovules directly on leaves. Over time, these fertile leaves evolved into a condensed and simplified form—the cycad cone. In Cycas, the leaflike structure was some-As the attack angle increases, the front cone and inner cone structures become misaligned, and the position of the front cone moves down. The number of fragments in the inner cone and cross-wings increases, the fragment density on the side where the projectile first contacts the target is greater than that on the other side, and the ...The thinner nose cone (version 1) is tested up to the displacement in axial direction of 100 mm. The structure with thicker wall (version 2) is tested up to the displacement of 160 mm. The thinner impact attenuator, at two subsequent stages of the test i.e. before quasi-static test and after the displacement of 100 mm, is shown in Fig. 7.In algebraic geometry, we have the cone structures consisting of varieties of minimal rational tangents (VMRT) given by minimal rational curves on uniruled projective …Concretions are commonly misunderstood geologic structures. Often mistaken for fossil eggs, turtle shells, or bones, they are actually not fossils at all but a common geologic phenomenon in almost all types of sedimentary rock, including sandstones, shales, siltstones, and limestones.

pollen cones of cycads are similar to seed cones, and pollen is born on the lower surface of scale-like structures. It is generally believed that in the ancestral type, cycads bore ovules directly on leaves. Over time, these fertile leaves evolved into a condensed and simplified form—the cycad cone. In Cycas, the leaflike structure was some-tepee, also spelled tipi, conical tent most common to the North American Plains Indians.Although a number of Native American groups used similar structures during the hunting season, only the Plains Indians adopted tepees as year-round dwellings, and then only from the 17th century onward. At that time the Spanish introduction of horses, guns, …Sep 30, 2022 · A sensor with a uniformly distributed micro-cone structure (UDMCS) was also fabricated as a reference and is referred to as sample 4, as shown in Fig. 3 (d). Download : Download high-res image (265KB) Download : Download full-size image; Fig. 3. Structure distributions in the dielectric layers of four sensors. The results of a Photoelastic study of the development of fractures in homogeneous materials subjected to compression differed from the previously described nature of cone …The electronic structure of pristine graphene has conical bands, so-called 'Dirac cones', which touch at the Fermi level at the K and K′ points in the Brillouin zone 1.As a result, charge ...

Cone-shaped subwavelength structures (SWSs) were fabricated on a GaAs substrate by utilizing a confined convective self-assembly process followed by inductively coupled-plasma reactive-ion etching. A self-assembled polystyrene monolayer was used as an etch mask for pattern transfer onto the GaAs substrate. The fabricated SWS, having a cone ...For each n ∈ {1,2,3,...}∪{ω} there is a computable structure of computable dimension n. Matthew Harrison-Trainor. Computable structures on a cone. Singapore, ...The growth cone (green) on the left is an example of a “filopodial” growth cone, while the one on the right is a “lamellipodial” growth cone. Typically, growth cones have both structures, but with varying sizes and numbers of each. The morphology of the growth cone can be easily described by using the hand as an analogy. Examples of Three Dimensional Shapes. A cube, rectangular prism, sphere, cone, and cylinder are the basic three dimensional figures we see around us.. Real-life Examples of Three Dimensional Shapes. 3D shapes can be seen all around us. We can see a cube in a Rubik’s Cube and a die, a rectangular prism in a book and a box, a sphere in a globe …General considerations about cone-in-cone structures. Carbonate cone-in-cone (CIC) structures are a minor sedimentary structure in calcareous layers within shales and in the outer parts of septaria-type concretions; CIC resembles a set of concentric, right circular cones fitting one into another in inverted positions (base upward, apex downward ...

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Mar 1, 2010 · The breakthrough idea that cone-in-cone structure is secondary to fibrous structure was proposed by Tarr (1932), who believed that “cone-in-cone is an epigenetic structural feature, characteristic of calcite layers (…), in which it was induced by pressure that created conical shear surfaces” (p. 732) caused by the weight of overlying beds. May 29, 2018 · 1. (in botany) A reproductive structure occurring in gymnosperms, known technically as a strobilus. It consists of sporophylls bearing the spore-producing sporangia. Gymnosperms produce different male and female cones. The large woody female cones of pines, firs, and other conifers are made up of structures called ovuliferous scales, which bear ... The nano-cone structure's coating looks like a cone forest composed of nano-cones in size from 100 to 800 nm (Fig. 1 a). Combined with the cross-sectional topography (Fig. 1 b), it can be seen that the nano-cones are similar to pyramids of different sizes that spread over the entire surface.Jun 10, 2021 · In differential geometry, we have cone structures induced by the geometric structures underlying holomorphic parabolic geometries, a classical example of which is the null cone bundle of a holomorphic conformal structure. Muller cells provide structural and nutritional support for the retinal neurons. 4. Outer nuclear layer: This layer contains the cell bodies of the photoreceptor cells. Rods and cones can be distinguished histologically by their nuclei—the nuclei of rods are smaller, more rounded, and more darkly stained than the nuclei of cones. 5.As the name suggests, these features tend to be conical in shape and can be light- or dark-colored. There are three types of volcanic cones: 1) cinder cones, composite cones, and shield volcanoes. Sunset Crater in northern Arizona is an example of a cinder cone so young that local farmers almost surely watched it erupt about 900 years ago.

V = 1 3s2h V = 1 3 s 2 h. or. V = s2h ÷ 3 V = s 2 h ÷ 3. Interestingly, the volume of a pyramid is 1 3 1 3 the volume of a prism with the same base and height. Exercises 1.26.1 1.26. 1. 1. A pyramid has a square base with sides 16 16 centimeters long, and a height of 15 15 centimeters. Find the volume of the pyramid.Seed-cone structure is fairly similar in all three genera of Taxodioideae, especially between Glyptostrobus and Taxodium, reflecting their close relationship (Gadek et al., 2000; Yang, Ran & Wang, 2012), but they differ in three respects: formation of the cone axis, correlation between tooth and ovule number, and tooth ontogeny. The numerical results prove that the proposed structure is superior compared with cone, truncated cone, and cylindrical NWs. The reported design achieves an ultimate efficiency of 44.21% with ...Let me add some remarks in addition to Roberto's answer. Question 2. has the same answer as Question 1: a knot is the singular locus of a hyperbolic cone metric iff the knot has hyperbolic complement (complete finite-volume hyperbolic metric) iff there is a cone metric with angle ≤ π ≤ π. This follows from Thurston's hyperbolic Dehn ...Example 2: Fixed Roof Tank Emission (Cone Roof and Dome Roof) 78 Example 3: Floating Roof Emission Losses 81 REFEREENCE 84 . KLM Technology Group Practical Engineering Guidelines for Processing Plant Solutions www.klmtechgroup.com Kolmetz Handbook Of Process Equipment Design STORAGE TANK ...pharynx, (Greek: “throat”) cone-shaped passageway leading from the oral and nasal cavities in the head to the esophagus and larynx.The pharynx chamber serves both respiratory and digestive functions. Thick fibres of muscle and connective tissue attach the pharynx to the base of the skull and surrounding structures. Both circular and …Rocks with the cone-in-cone structure form inter- layers and lenses from 1 cm to 0.4–0.5 m in thickness. The height of cones varies from a few millimeters to 10 (rarely 20) cm; their …In addition to photosynthesis, leaves play another role in the life of the plants. Pine cones, mature fronds of ferns, and flowers are all sporophylls—leaves that were modified structurally to bear sporangia. Strobili are cone-like structures that contain sporangia. They are prominent in conifers and are commonly known as pine cones.Dental cone beam CT was developed as a means of producing similar types of images but with a much smaller and less expensive machine that could be placed in an outpatient office. Cone beam CT provides detailed images of the bone and is performed to evaluate diseases of the jaw, dentition, bony structures of the face, nasal cavity and sinuses.Growth cones are the highly motile structures found at the tips of growing axons and dendrites (neurites), which extend from neurones, during the development of the nervous system. They function both as detectors and transducers of extrinsic guidance cues and as regions where the neurite assembly, advance cannot occur. Assembly of the neurite ...According to the aforementioned strategy, the cone-helix models with the five standard apex angles were constructed by introducing disclination angles, and geometry optimization was carried out to obtain the relaxed configurations. In Fig. 4, these models were compared to the stacked-cup models with the same disclination angles [25].It can be seen that while the cone-helix models represent a ...

Nov 13, 2007 · Therefore, the size of ovulate cones appears counteradaptive for wind pollination unless the cones accumulate pollen by a mechanism other than simple impaction. In many members of the pine family, ovulate cones structurally resemble a turbine because they comprise helically arranged scale-bract complexes (hereafter called scales), each curved ...

conelike structures Crossword Clue. The Crossword Solver found 30 answers to "conelike structures", 8 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. Enter the length or pattern for better results. Click the answer to find similar crossword clues .A male cone has a central axis on which bracts, a type of modified leaf, are attached. ... while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium. Figure 3. These series of micrographs shows a female gymnosperm gametophyte. (a) This cross section of a female cone ...Non-confocal split detector AOSLO imaging reveals remnant cone inner segment structures in areas that lack reflectivity in confocal AOSLO [29, 52] (Figs. 1(a) and 1(b)), showing potential for predicting therapeutic outcomes [32, 49], and thus making automated detection of these cone structures desirable.May 1, 2018 · General considerations about cone-in-cone structures. Carbonate cone-in-cone (CIC) structures are a minor sedimentary structure in calcareous layers within shales and in the outer parts of septaria-type concretions; CIC resembles a set of concentric, right circular cones fitting one into another in inverted positions (base upward, apex downward ... The cone structures showed twisted microcones displaced with respect to the center of the irradiation spot. We believe that the center of the focal beam was displaced, based on the focal spot ...Novel composites with periodic hollow truncated cone structure were prepared by the 3D printing technique and the impregnation method. • The simulated and experimental results indicate that the bandwidth of composites less than -10 dB reaches to 16.31 GHz, and the value of minimum reflection loss is -19.53 dB at 2.27 GHz under the optimal condition of geometrical parameters and sheet resistance.Cinder cones are circular to oval volcanic cone structures, which are composed exclusively or predominantly of pyroclastic ejecta dominated by cinder. They therefore form the simplest type of volcanoes. Cinders are glassy rock fragments which contain numerous gas bubbles "frozen" as magma exploded into the air and then cooled quickly. These ...

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Therefore, the cone support structure is one of the most commonly used support structures in SLM. However, its poor machinability can significantly reduce the quality of work and cause inevitable surface damage. Hence, it is particularly important to solve the problems of tilting and collapsing of cone supports in the process of machining and ...Step 1: Write the given dimensions of the conical cylinder. Step 2: Substitute the given values in the formula of volume of the conical cylinder, V = πH/3 (R 2 + Rr + r 2) assuming the height of the conical cylinder as "H". Step 3: Solve for "H". Step 4: The value so obtained is the height of the conical cylinder.Concretions Concretions are masses of inorganic sedimentary materials in other sediments. They are generally harder than the rocks surrounding them, and therefore many of them are weathered out of the rocks. Concretions may be formed from any of a number of minerals.Collapse of growth cone structures on contact with specific neurites February 1987 The Journal of Neuroscience : The Official Journal of the Society for Neuroscience 7(1):201-12The male cones in Pinus are small and clustered whereas the Cycas male cones are large and terminal structures with microsporophylls. Q5 . What is a Cycas male cone? The Cycas male cone is likely the largest male cone in the plant kingdom. A short stalk connects this woody, compact, oval or conical structure to the tip of the stem.Distribution of the structures in the NDMCS sensor. Three sensors were selected and fabricated for the experimental group from more than 10 million kinds of dielectric layer microstructure distributions, and a sensor with a uniformly distributed micro-cone structure is selected as a reference.Rocks with the cone-in-cone structure form inter- layers and lenses from 1 cm to 0.4–0.5 m in thickness. The height of cones varies from a few millimeters to 10The opening of a cinder cone is a cone-shaped structure, while the steeps are formed of the erupted, fragmented cinders that fall close to the chimney/vent. The manner of eruption for cinder cones is relatively simple. When the lava erupts, its cinders of it are blown into the air. These fragmented cinders fall a short distance from the opening ...Purpose.: To study cone photoreceptor structure and function associated with mutations in the second intradiscal loop region of peripherin/RDS. Methods.: High-resolution macular images were obtained with adaptive optics scanning laser ophthalmoscopy and spectral domain optical coherence tomography in four patients with peripherin/RDS mutations and 27 age-similar healthy subjects.The growth cone (green) on the left is an example of a "filopodial" growth cone, while the one on the right is a "lamellipodial" growth cone. Typically, growth cones have both structures, but with varying sizes and numbers of each. The morphology of the growth cone can be easily described by using the hand as an analogy.As the attack angle increases, the front cone and inner cone structures become misaligned, and the position of the front cone moves down. The number of fragments in the inner cone and cross-wings increases, the fragment density on the side where the projectile first contacts the target is greater than that on the other side, and the ...2.4. Internal and Surface Structure of Cone Scale. To identify the structural specificity (density, morphology, etc.) of the cone scale, internal and surface structure images were observed using FE-SEM (Figure 4). In mature scales, the major tissues found in the surface of the parenchyma were pierced tubular resin ducts. ….

Invented and patented by Chuck Henderson, the system uses the unique strength of intersecting cone segments to form sweeping concave and convex continuous curves. The remarkable strength of the multi-conic geometry translates loads into the shearing structural elements of the building material (plywood, ferro-cement, or oct-tet truss framework).For more Tekla structures videos go to my channel, click on the following link https://www.youtube.com/ganiskHow to create Cone and elliptical shapes in Tekl...The seeds develop in mature female cones, structures where female gametophytes develop eventually producing eggs that, when fertilized, develop into the embryos present in seeds. These trees also produce male cones where male gametophytes (pollen) are produced and subsequently released. The cones of Giant Sequoia are fire adapted, opening in ...14 oct 2013 ... I would like to know a time period of when Cone in Cone Structures were formed. Any ideas?? Thanks in advance.Cone-Shaped Roofs. blog_beopenfuture. March 31, 2021 8:22 pm. Architects have long been informed by shapes and forms found in nature. It looks as if pinecones, mushrooms and hop cones have been an inspiration to these roundels aiming to recreate complex organic structures for those who enjoy idiosyncrasies of living in circular spaces.Aug 8, 2018 · Non-confocal split detector AOSLO imaging reveals remnant cone inner segment structures in areas that lack reflectivity in confocal AOSLO [29, 52] (Figs. 1(a) and 1(b)), showing potential for predicting therapeutic outcomes [32, 49], and thus making automated detection of these cone structures desirable. The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting …. View full aims & scope. $4270.Putting all the data together researchers found that the structure is cone shaped, about 230 feet (70 meters) in diameter and nearly 32 feet (10 meters) tall. It weighs an estimated 60,000 tons.The cup and cone structures are concave and convex cone-shaped, respectively. Representative cup and cone structures are marked with dashed rectangles in Fig. 4 (b). Fig. 4 (b)-(d) present the spallation morphologies close to the free surface of the target. Large quantities of cone structures are observed, and the cup structures are rare on ... Cone structures, Rod-cone degeneration (RCD) causes progressive death of photoreceptors with consequent vision loss over many years. 1 The slowly progressive nature of RCD makes it challenging to reliably monitor changes during a period of 1 or 2 years. In RCD, night vision and peripheral vision are lost earliest, but visual acuity can remain stable and normal until advanced stages of disease. 1 A longitudinal ..., Paleontologists classify mysterious ancient cone-shaped sea creatures Date: January 11, 2017 ... "Our most important and surprising discovery is the hyolith feeding structure, which is a row of ..., 4-space. The most basic geometrical structure that Minkowski assigned to M is the notion of a null cone, [2 26] which describes how light propagates at any particular event p in M. The null cone—which is a double cone, with common vertex at p—tells us what the 'speed of light' is in any direction, at the event p (see Fig. 2.12 (a))., Here, we demonstrate the fabrication of mesoscale ordered two-dimensional π-conjugated polymer kagome lattices with semiconducting properties, Dirac cone structures and flat bands on Au(111)., Cone/plate structures can effectively suppress thermal conduction-caused heat loss. High evaporation rate of 2.21 kg m −2 h −1 with an efficiency of 131.4% was achieved. High sea water evaporation capacity of 5.68 kg m −2 on a cloudy day was achieved., A stereotypical conifer cone, like those of spruces or pines, is a robust structure composed of woody scales that support and protect developing seeds. However, not all conifers have such a cone; around 40 % of living species produce something closer to what one might informally call a ‘berry’ or a ‘drupe’, with white, orange, red or ..., The growth cone (green) on the left is an example of a "filopodial" growth cone, while the one on the right is a "lamellipodial" growth cone. Typically, growth cones have both structures, but with varying sizes and numbers of each. The morphology of the growth cone can be easily described by using the hand as an analogy., Oct 3, 2023 · A traffic cone. A unit of volume, applied solely to marijuana and only while it is in a smokable state; roughly 1.5 cubic centimetres, depending on use. ( anatomy) Any of the small cone-shaped structures in the retina. [1] ( slang) The bowl piece on a bong. ( slang) The process of smoking cannabis in a bong. ( slang) A cone-shaped cannabis joint. , Rod-cone degeneration (RCD) causes progressive death of photoreceptors with consequent vision loss over many years. 1 The slowly progressive nature of RCD makes it challenging to reliably monitor changes during a period of 1 or 2 years. In RCD, night vision and peripheral vision are lost earliest, but visual acuity can remain stable and normal until advanced stages of disease. 1 A longitudinal ..., A cone only has one flat surface, its circular base. Its other surface is a curved one that extends from the base to the apex. A cone has many important features, starting with a circular base and curved side., May 11, 2023 · A cactus spine with a grooved cone structure provides an ideal model for designs capable of transporting liquids directionally. Inspired by the cactus spine, a lot of artificial liquid transport systems have been reported. In fact, aligned micro-grooves on natural cactus spines are helical rather than straig , Opsins have a seven-transmembrane structure similar to that of other GPCRs, but are distinguished by a lysine residue that is a retinal-binding site in the seventh helix. ... Okano T, Kojima D, Fukada Y, Shichida Y, Yoshizawa T. Primary structures of chicken cone visual pigments: vertebrate rhodopsins have evolved out of cone visual pigments ..., Correct AnswerPeople who are color blind are missing a photopigment sensitive to specific wavelengths of light (long or short).The eye contains three types of cone cells, activated by short, medium, and long wavelengths.Incorrect answer. Match the types of stimuli with the sensory receptors in which transduction takes place., The δ 18 O values of cone-in-cone structures from Podillya and Moldova are very low and strikingly uniform (from − 14 to − 13‰), and much lower than those of pedogenic siderites (from − 9 ..., The probable indicative role of cone-in-cone structure in the mapping of fluid-conducting systems is a consequence of the proposed hypothesis. Morphostructural investigation of carbonate cone-in-cone formations allows to conclude that they belong to self-organizing (dissipative, according to I. Prigogine's terminology) systems of the geological ..., The best developed cone-in-cone structures occur in Core Section 330-5-1. Figure 1 shows a section across one side of a major cone structure with an apical angle close to 60°. The prominent partings separating in-dividual cones are filled with soft clay, but thinner clay partings mark smaller parasitic cones. Ribbing features, A tipi is a cone-shaped structure made of tall wooden poles tied together in a point at the top and covered in animal hides. A wigwam looks more like a yurt: It’s short, circular, and has a rounded roof. Wigwams, like yurts and tipis, are made with wooden poles. However, unlike the other dwellings, wigwams are usually not covered in animal ..., Large Cone-In-Cone Sedimentary Structure - A Mysterious Geologic Oddity - From Iowa, USA. JonesMineralCabinet., Concretions Concretions are masses of inorganic sedimentary materials in other sediments. They are generally harder than the rocks surrounding them, and therefore many of them are weathered out of the rocks. Concretions may be formed from any of a number of minerals., Oct 21, 2022 · The structure of the cone cell varies across the retina, and is highly modified towards the fovea compared to those located more peripherally. There are 3 different types of cone cells: L type, S type, and M type. Cones are located throughout the entire retina, but are localised around the fovea. Cone density is higher in the nasal retina ... , Usually, a structure's roof rises to a point, cones and conical shapes have also been used in interior atriums, walls, and the entire building massing. Today, this form can be seen in residential, commercial and cultural projects worldwide. While cones may seem whimsical, they are also functional. The reason they are often used in roofs is ..., The cone-in-cone structures from the Gogolin Formation (Lower Muschelkalk, Middle Triassic, SW Poland) were first reported by Bodzioch (2005) and interpreted as a primary calcite crust resembling selenite crystals. Similar calcite laminae were also found within the Cavernous Limestone horizon composing the uppermost part of the Röt, and ..., A theory of general Legendrian cone structures is yet to be developed. It seems reasonable to start with studying Z-isotrivial Legendrian cone struc-tures for a general nondegenerate Z ⊂PV. When Z ⊂PV is a subadjoint variety, a Z-isotrivial Legendrian cone structure is a parabolic contact struc-ture in the sense of Section 4.2 of [CS]., Jan 1, 2023 · A Dirac cone in the band structure is also exhibited by δ-graphyne [135] which is more stable than α-graphyne. Boron can also be used as a 2D Dirac material. For example, a special boron monolayer called Pmmm boron with a rectangular cell was predicted to have Dirac cones [136] grown on the substrate [137]. The foregoing implies the ... , unique cone structure with cone angle fi of the following kind: † Euclidean for fi = fi0, † hyperbolic for fi 2 (0;fi0), and † spherical for fi 2 (fi0;…]. When fi = …, this structure corresponds to an orbifold doubly covered by a lens space. By a deformation argument, the cone angle fi can be increased slightly beyond … by, Cinder cones are circular to oval volcanic cone structures, which are composed exclusively or predominantly of pyroclastic ejecta dominated by cinder. They therefore form the simplest type of volcanoes. Cinders are glassy rock fragments which contain numerous gas bubbles "frozen" as magma exploded into the air and then cooled quickly. These ..., The cone pigments with the lowest maximal absorption peak, including those that are UV-sensitive, possess the 'clear' or 'transparent' type of oil droplets with little spectral tuning effect. [31] The colours and distributions of retinal oil droplets vary considerably among species, and is more dependent on the ecological niche utilised (hunter, fisher, …, Cone-shaped structures of medulla, with apex facing inward toward hilus and base facing outward toward cortex. Inward-facing tip is called renal papilla. Renal lobes are centered around pyramids. renal papilla. Inward-facing tip of renal pyramid. Capped on intererior aspect by clear crescent-shaped lumen and minor calyx., Cone-shaped subwavelength structures (SWSs) were fabricated on a GaAs substrate by utilizing a confined convective self-assembly process followed by inductively coupled-plasma reactive-ion etching. A self-assembled polystyrene monolayer was used as an etch mask for pattern transfer onto the GaAs substrate. The fabricated SWS, having a cone ..., The most prominent features of growth cone structure are filopodia and lamellipodia. Filopodia can be quantified in terms of their number, positions, angles and lengths, while a simple measure of lamellipodial extent is the total area of the growth cone. One way of quantifying the shape of a growth cone at each moment is therefore to provide a ..., The future of cone photoreceptor structure/function discovery is bright with emerging models consisting of the cone-rich Nrl−/− mouse line and Nile rat species. Current EM data will be augmented by application of advanced structural methods such as AFM ( Fotiadis, et al., 2006 ) and cryo-ET ( Nickell, et al., 2007 ) that have been ..., Ctenophora (/ t ə ˈ n ɒ f ər ə /; SG: ctenophore / ˈ t ɛ n ə f ɔːr, ˈ t iː n ə-/; from Ancient Greek κτείς (kteis) 'comb', and φέρω (pherō) 'to carry') comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of cilia they use for swimming (commonly referred to as "combs"), and they …, A USBR soil scientist advances a Giddings Probe direct push soil sampler.. Geotechnical investigations are performed by geotechnical engineers or engineering geologists to obtain information on the physical properties of soil earthworks and foundations for proposed structures and for repair of distress to earthworks and structures caused by subsurface …