bluuebunny/crossref_metadata_2025 huggingface dataset:
Título en español.
Authors: Ismael Carlo  , Jaime Vélez
Published: October 2020

La Estación Experimental Agrícola del Recinto Universitario de Mayagüez llevó a cabo en la Subestación de Corozal un estudio para determinar si es posible que una vaca desechada de un hato lechero pueda criar un becerro adoptivo en adición al suyo. Los datos obtenidos indicaron que estas vacas pueden criar satisfactoriamente los dos becerros hasta los 8 meses de edad. El experimento comprendió dos tratamientos: en el tratamiento I se destetó el becerro adoptivo a los 4 meses de edad, complementándose el pastoreo durante los 4 meses siguientes con 4 libras de alimento concentrado por día por animal. El becerro propio continuó con la madre hasta los 8 meses de edad. En el tratamiento II ambos becerros fueron criados por la madre hasta los 8 mesed de edad. El análisis estadístico de los datos obtenidos indicó que el destete del becerro adoptivo a los 4 meses no es ventajoso. Aunque al término de 8 meses para ambos casos estos becerros pesaron 11.95 libras más que los adoptivos que continuaron con la vaca nodriza durante igual período, el peso adicional no compensa los gastos adicionales incurridos en la compra de alimento, comederos y mano de obra requeridos por estos becerros. A los 4, 6 y 8 meses de edad, las ganancias en peso de los becerros propios fueron significativamente superiores comparadas con las de los adoptivos. El peso al nacer también resultó significativamente superior a favor de los propios. El sexo del becerro no afectó las ganancias al hacerse las comparaciones pertinentes. Se presentan los datos de tasas de ganancia diaria tanto de los becerros propios como de los adoptivos. No se experimentó dificultad alguna respecto de la adopción por parte de la vaca nodriza. El intervalo entre los partos en el caso de las vacas que parieron por lo menos dos veces fue de 395.24 días. Veintitrés de las vacas, nueve de las cuales nunca parieron, tuvieron problemas reproductivos.
Título en español.
Authors: Lii-Jang Liu  , Amelia Cortés-Monllor  , Karl Maramorosch  , H. Hirumi  , J. Enrique Pérez  , Julio Bird
Published: October 2020

Bacterias parecidas a Xanthomonas vasculorum se aislaron de los haces vasculares de tallos de caña de las variedades B. 49119, Co. 421 y P.R. 980 afectadas por el enanismo del retoño. Las pruebas bioquímicas y serológicas que se hicieron indican que probablemente se trata de X. vasculorum. Uno de los cultivos reveló síntomas muy parecidos a los que normalmente se asocian con el enanismo. No se logró reproducir los síntomas de la enfermedad al inocularse cañas sanas con el jugo de cañas afectadas, después de pasarse por un filtro bacteriológico del tipo Seitz.
Effect of the Nematocides Nemagon and DD on Mineralization, Nitrification, Soil Microbial Population, and Soil Fertility Status of Two Tropical Soils
Authors: Dubey H. D. , Riera A. , Rodríguez R. L.
Published: October 2020

Nitrification was inhibited in an acid soil by 60 p/m or more of Nemagon; the NH4+ oxidizing bacteria being affected but not the Nitrobacter, as NO2- accumulation was not observed. Nitrogen mineralization was not affected even at 20,000 p/m of Nemagon and an increase in available P, Mn, and a rise in pH occurred in both acid and alkaline soils. Extractable zinc increased in the acid soil. DD was extremely toxic to the nitrifying bacteria; much more so than Nemagon. It inhibited NH4+ oxidizing bacteria but not the Nitrobacter. Nitrogen mineralization was progressively depressed with increasing levels of DD. It resulted in a decrease in pH and extractable P. Mn increased in both the acid and alkaline soils, whereas the effect on Fe and Mg were inconsistent. Bacteria, actinomycetes and fungi were suppressed drastically. At lower levels bacterial population was increased, indicating a possible role in detoxification of DD.
Preliminary Survey of Microorganisms Associated with Some Insects in Puerto Rico
Authors: Kuno Goro
Published: October 2020

Many bacteria, fungi and several species of nematodes were isolated during a preliminary investigation of microorganisms associated with some insects of Puerto Rico. Although most of the organisms did not prove to be parasitic, a few fungi, notably Metarrhizium anisopliae and Entomophthora virulenta, were found highly pathogenic under laboratory conditions. Several protozoa belonging to Microsporida were found in Aedes mediovittatus, Anopheles grabhamii, Culex secutar, and Diatraea saccharalis for the first time.
Título en español.
Authors: Saulo J. Rodríguez  , Carlos Rivera-López
Published: October 2020

Esquejes arraigados de Pelargonium se sembraron en tiestos plásticos de un galón de capacidad en un invernadero. Los tiestos contenían distintas mezclas para el medio de crecimiento, incluyendo musgo turboso. Esquejes de dichas plantas se cosecharon a intervalos regulares anotándose el número y peso fresco de los esquejes. Los resultados revelaron que varias materias y proporciones eran tan buenas como el musgo turboso para el crecimiento de plantas de Pelargonium como plantas madres. La hojarasca de café seca o bagazo de caña de azúcar fueron consistentemente tan buenas como el musgo turboso. El pergamino y las borras de café así como los desperdicios del despalillado de tabaco siempre afectaron adversamente el crecimiento. La viruta de madera, aserrín o un suelo orgánico (turba Tiburones) fueron detrimentales para el crecimiento en varias proporciones con los dos suelos usados (arena Cataño y arcilla Cialitos). Las plantas que se sembraron en mezclas que contenían musgo turboso, hojarasca de café o bagazo de caña de azúcar no se afectaron en las proporciones usadas. Las plantas sembradas en las mezclas que contenían los desperdicios del despalillado de tabaco, borras o pergamino de café consistentemente crecieron menos a medida que la materia estudiada aumentaba. Las sembradas en mezclas que contenían viruta de madera, aserrín o el suelo orgánico muchas veces no desarrollaron bien a medida que la cantidad del suelo aumentaba.
Título en español.
Authors: Raúl Pérez Escolar  , William F. Allison
Published: October 2020

En este trabajo se presentan los resultados de un estudio en el que se determinó el efecto de la profundidad del nivel freático en la producción de caña y azúcar de las variedades PR 980, PR 1028, PR 1059, PR 1141, PR 64-610, PR 61-632 y PR 64-2705 sembradas en tanques lisímetros a la intemperie. Mediante el uso de tubería plástica perforada instalada a distintas profundidades y distancias, se estudió en el campo el efecto de la profundidad del nivel freático en la producción de caña y azúcar de la variedad PR 980. Los resultados obtenidos demuestran que las variedades de caña difieren en su comportamiento con respecto a la profundidad del nivel freático. Las variedades PR 980, PR 1059, PR 64-610, PR 61-632 y PR 64-2705 produjeron significativamente más caña y azúcar según bajaba el nivel freático. Las variaciones en profundidad del nivel freático no afectaron significativamente las producciones de las variedades PR 1028 y PR 1141. Bajo condiciones de campo, mediante el uso de tubería plástica perforada, la variedad PR 980 produjo significativamente más azúcar que en las parcelas testigos. En general, los elementos nutritivos N, K, Ca y Mg se absorbieron en mayores cantidades a medida que bajó el nivel freático. Se puede decir que el uso de los tanques lisímetros para estos estudios es una buena indicación de lo que ocurre bajo condiciones de campo.
Título en español.
Authors: A. Sotomayor-Ríos  , J. Vélez-Santiago  , S. Torres-Rivera  , S. Silva
Published: October 2020

Los rendimientos de forraje verde (FV), materia seca (MS) y proteína bruta (PB) se determinaron en 19 yerbas pertenecientes a los géneros Cynodon, Brachiaria y Digitaria durante un período de 2 años. La mejor productora en términos de FV en el corte a 30 días fue Digitaria setivalva (PRPI 6402), mientras que a 45 y 60 días correspondió a Brachiaria sp. (PRPI 9626). Estas yerbas produjeron 86,794, 102,116 y 109,213 kg. de FV por hectárea y año, en los cortes a 30, 45 y 60 días, respectivamente. Las producciones medias de FV por hectárea y año de las 19 yerbas aumentaron según se alargó el intervalo de corte. Las mejores productoras en términos de MS en los cortes a 30, 45 y 60 días fueron Brachiaria sp. (PRPI 9626), Estrella (PRPI 2:341) y Brachiaria decumbens (PRPI 5365) con un total de 18,430, 21,758 y 27,238 kg./ha./año, respectivamente. Las producciones medias de MS por año de las 19 yerbas aumentaron según se alargó el intervalo de corte. Digitaria pentzii x D. smutsii (PRPI 9621), D. pentzii x D. milanjiana (PRPI 9619), D. pentzii x D. pentzii (PRPI 9620), mostraron el contenido de PB más alto en los cortes de 30, 45 y 60 días con 14.3, 12.0 y 11.1 %, respectivamente. El contenido medio de PB de las 19 yerbas, disminuyó a medida que se alargó el intervalo de corte. Digitaria decumbens (PRPI 6439) en el corte a 30 días y Estrella en los cortes de 45 y 60 días fueron les mejores productoras en términos de PB total con 2,179, 2,141 y 2,030 kilogramos por hectárea y año, respectivamente. La yerba Estrella mostró tener el porcentaje más elevado en de MS los intervalos de corte a 30, 45 y 60 días, con 29.5, 32.5 y 33.1%, respectivamente. El contenido medio de MS de las 19 yerbas, aumentó según se alargó el intervalo de corte. El contenido en fósforo, magnesio y potasio en el forraje también disminuyó a medida que se alargó el intervalo de corte. Por otro lado, tuvo muy poco efecto sobre el contenido en calcio. Se obtuvo una correlación positiva significativa entre la producción de MS total de las 19 yerbas y la temperatura media para los cortes a 30, 45 y 60 días. Por otro lado, la correlación entre el contenido en PB y la temperatura media fue negativa, pero significativa. No se observó correlación significativa alguna entre lluvia y producción total de MS o el contenido en PB y lluvia.
Título en español.
Authors: H. Talleyrand  , R. H. Fox  , M. A. Lugo-López
Published: October 2020

Se realizaron experimentos de campo utilizando el maíz híbrido Funk's G795W en cuatro suelos representativos de los Oxisols y Ultisols de las regiones tropicales húmedas: en dos Oxisols (Manatí y Barranquitas) y en dos Ultisols (Corozal y Cidra). Los tratamientos incluían niveles variables de N que fluctuaban de 0 a 200 Kg./Ha. Los objetivos principales eran determinar el rendimiento potencial y el nivel óptimo de N que se requiere para la producción del maíz Funk's G-795W, un híbrido de grano blanco de alto potencial productivo. Los resultados indican que: 1) se obtuvieron altos rendimientos de 8.4 T./Ha. en Corozal, pero los rendimientos máximos en Manatí sólo alcanzaron a 5.4 T./Ha.; 2) en el suelo Bayamón (Manatí), 60 Kg./Ha. de N fueron suficientes para lograr un rendimiento casi máximo de grano; en el suelo Humatas (Corozal), el nivel óptimo de N fluctúa entre 60 y 120 Kg./Ha.; 3) la razón de grano a rastrojo en el caso del maíz abonado con N alcanzó, en promedio, 1.20 en Corozal y sólo 0.72 en Manatí; 4) la capacidad de suministro de N en el suelo Bayamón, un Oxisol arenoso, ha aumentado marcadamente sobre el obtenido en años anteriores; 5) no hubo respuesta estadísticamente significativa en rendimientos y en la absorción de N que se pueda atribuir al N aplicado, ni en el caso del suelo Catalina (Barranquitas), ni tampoco en el del suelo Torres (Cidra); en ambos sitios se sembró tardíamente y no había instalaciones para regar. A la tardanza de la siembra y la sequía prolongada puede probablemente atribuirse la reducción en el rendimiento de rastrojo a menos de la mitad de los obtenidos en los dos sitios en que se pudo regar (Corozal y Manatí). Los rendimientos de grano no alcanzaron las 8.4 T./Ha. obtenidas en Corozal. La capacidad del suelo para suministrar N fue suficiente para proveer los 70-90 Kg./Ha. de N en la planta necesarios para rendimientos máximos en ambas localidades, pero no hubo respuesta a las aplicaciones de abonos con N; 6) en Corozal, las recuperaciones aparentes de N proveniente del abono fueron de 60-72%, en el caso de las aplicaciones de N en dosis más bajas.
Título en español.
Authors: Saulo J. Rodríguez  , Carlos Rivera López
Published: October 2020

Esquejes de Dracaena sanderiana Hort. se sembraron en una mezcla de partes iguales de arena y musgo. A esta mezcla se le aplicó nitrógeno a niveles de 0, 300, 600, 900, 1,200 y 2,400 libras por acre y año. Luego se tomaron muestras de las hojas que ocupaban la cuarta, quinta y sexta posición en la parte joven del tallo, cuando ya los esquejes habían alcanzado un tamaño apropiado para un esqueje comercial. Estas hojas se analizaron para determinar su contenido en varios elementos. En la primera recolección de hojas el contenido en N, P y K no reflejó diferencias estadísticas. Sin embargo, en la segunda recolección, hecha en la misma forma, los análisis para N, P y K reflejaron variaciones debidas a las aplicaciones de nitrógeno. Hubo un aumento en el contenido en nitrógeno de la hoja según aumentaron los niveles de nitrógeno aplicados al medio, y una reducción simultánea en el P y el K de las hojas. El contenido en Fe disminuyó al principio, aumentando luego con aplicaciones sobre las 900 libras de nitrógeno. Los contenidos en Ca y Mg no fueron afectados significativamente.
Título en español.
Authors: J. Maldonado Capriles
Published: October 2020

Este artículo es un estudio del género Heza, del orden de los hemipteros, en el cual se describen ocho nuevas especies, Heza aurantia, H. polita, H. ornata, H. haitiana, H. leucothorax, H. rubromarga y H. ruber. Tres especies originalmente descritas por Stal se redescriben del material tipo. Se ilustran detalles morfológicos de 26 de las 31 especies descritas y además se da una clave para 28 de las 31 especies conocidas de este género.
The Influence of the CIO Profile in the Alignment of Information Technologies with the Business Strategy in Mexican Corporations
Authors:   Benemérita Universidad Autónoma de Puebla, Rodríguez Morales Julia I. , Muñoz-Chávez J. Patricia ,   Universidad Tecnológica de la Zona Metropolitana del Valle de México, Contreras Medina Emmanuel ,   Universidad Autónoma de Coahuila, Noriega Olalde Begoña ,   Universidad Panamericana, Sánchez Velasco José ,   Universidad Popular Autónoma del Estado de Puebla
Published: October 2020

The purpose of this study is to propose a model that shows the profile of the Chief Information Officer (CIO) in the alignment of information technologies with the business strategy in the case of large Mexican corporations, in order to recognize the importance of this role in the achievement of organizational goals and have a more adequate perception of its scope in organizations. The results obtained so far indicate that the gender that predominates in the role of the CIO is male, with an age range that tends to be over 40 years old and the language that they consider important to the CIO is English, considering that the Management skills that stand out are communication and leadership, while the predominant knowl-edge required is a business analysis and support for business innovation.
Komplexní magmaticko-hydrotermální vývoj columbitu, mikrolitu a fersmitu z beryl-columbitového pegmatitu D6e u Maršíkova, Česká republika
Authors: Chládek Štěpán , Uher Pavel
Published: October 2020

The recently rediscovered small D6e granitic pegmatite body, enclosed in amphibole gneiss of the Sobotín amfibolite massif (Jeseníky Mountains, Czech Republic), is characterized by numerous accessory minerals, including common columbite group minerals (CGM) and minor microlite and fersmite related to blocky K-feldspar unit. The CGM show complex internal zoning. Primary magmatic columbite-(Mn) occurs as corroded domains of prevailing homogeneous pattern, followed by less evolved oscillatory zonation. Primary CGM were overprinted by extensive recrystallization controlled by late-magmatic to post-magmatic fluids and leading to a formation of complex patchy and convolute oscillatory domains of secondary (hydrothermal) CGM. Primary columbite-(Mn) shows significantly limited Ta/(Ta+Nb) and Mn/(Mn+Fe) ratios, whereas secondary columbite-(Fe) to -(Mn) show slightly wider Fe-Mn and Nb-Ta compositional variations. Complex textures and the element fluctuations indicate a partial dissolution-reprecipitation of primary CGM caused by late- to post-magmatic fluids. Moreover, late calciomicrolite I, II and fersmite precipitated on the cracks of columbite crystals. Rare U-rich calciomicrolite I was extensively replaced by fersmite and oscillatorily zoned U-poor calciomicrolite II, slightly enriched in F. Their formation sequestrated part of hydrotermally released Na, Ca, U and represents the final subsolidus fluid-driven stage of the pegmatite evolution. Textural and compositional variations of Nb-Ta mineralization point to a complex magmatic to hydrothermal evolution of the D6e beryl-columbite pegmatite similar to other pegmatites in this region.
Mineralogie antimonového výskytu Mikulovický vrch u Kadaně (Česká republika)
Authors: Sejkora Jiří , Pauliš Petr , Gramblička Roman , Pour Ondřej
Published: October 2020

Two rare sulfosalt minerals, fülöppite and plagionite, have been determined in samples from a small abandoned Sb occurrence Mikulovický vrch near Kadaň, northern Bohemia, Czech Republic. The more abundant fülöppite forms grey aggregates (up to 5 mm in size) with metallic lustre in quartz gangue and rare crystals up to 1.5 mm across in association with stibnite, plagionite, sphalerite, pyrite and arsenopyrite. Fülöppite is monoclinic, space group C2/c with refined unit-cell parameters: a 13.443(2), b 11.737(2), c 16.953(2) Å, β 94.69(1)° and V 2665.9(5) Å3. Its empirical formula (mean of 93 point analyses) is (Pb2.80Sn0.01Hg0.01)Σ2.82Sb8.18S14.99. Two types of plagionite were found as irregular aggregates up to 200 μm in size in quartz gangue, ussualy in association with fülöppite. The first rarer one is close to the ideal composition with empirical formula (mean of 10 point analyses) (Pb4.90Hg0.01)Σ4.91Sb8.07S17.02; the second is distinctly Pb-poor with the calculated N homologue number in the range of 1.37 - 1.74 and empirical formula (mean of 62 point analyses) (Pb4.31Sn0.02Hg0.01)Σ4.34Sb8.53S17.13. Determination of fülöppite and Pb-poor plagionite were also confirmed by Raman spectroscopy. Gypsum, valentinite, native sulphur and jarosite were detected as products of weathering of primary mineralization.
Strusky a železo z experimentální tavby železa realizované na hradě Buchlově (jv. Chřiby) v roce 2018
Authors: Dolníček Zdeněk , Kandrnál Ladislav , Ulmanová Jana , Vratislavská Ester , Hojač Pavel
Published: October 2020

During experimental smelting of iron in a replica of historical shaft furnace, which was held at the Buchlov Castle in 2018, charcoal and Mn-enriched pelosiderite-limonite iron ore from the locality Strážovice near Kyjov were used. The obtained furnace slag is practically completely formed by glass phase; only rare small domains also contain olivine. The glass phase is compositionally heterogeneous and contains 0.7 - 10.7 wt. % MnO, whereas olivine corresponds to fayalite with elevated contents of tephroite (ca. 12 mol. %), forsterite (ca. 4 mol. %) and dicalciumsilicate (1 mol. %) components. The produced metallic iron is also compositionally heterogeneous, rich in phosphorus and in places it contains small spherical inclusions of pyrrhotite. The phase composition of slag differs significantly from those of typical iron slags. The reason can be seen either in anomalous chemical composition of used ore (the elevated contents of Mn could potentially act as an inhibitor of crystallization), or in too high temperatures during smelting (the phase relations in metallic iron suggest temperatures exceeding 1500 °C) in combination with rapid cooling of the furnace content after finishing of smelting. Both phase composition of slag as well as chemical composition of individual slag phases and metallic iron are significantly different from those of local historical artefacts from the period of usage of technology of direct production of iron. These findings do not support the idea that local pelosiderite iron ores were used for production of iron already during this early period.
Pyrostilpnit z ložiska Stará Vožice - Ratibořské Hory (Česká republika)
Authors: Vrtiška Luboš , Škácha Pavel , Dolníček Zdeněk , Malíková Radana
Published: October 2020

A rare silver mineral pyrostilpnite, monoclinic Ag3SbS3, was found on a two museum specimens from the historical Ag-Pb-Zn ore deposit Ratibořské Hory-Stará Vožice near Tábor (southern Bohemia, Czech Republic). These samples come from the mineralogical collection of the National Museum in Prague. Pyrostilpnite forms tabular crystals or groups of small striated sharp crystals of red-orange to orange color up to 2.1 mm in size. Pyrostilpnite occurs in close association with pyrargyrite and dolomite. Pyrostilpnite is monoclinic, space group P21/c with the following unit-cell parameters refined from the PXRD studies: a 6.857(5) Å, b 15.851(6) Å, c 6.236(7) Å, β 117.2(5)° and V 603.1(8) Å3. Its empirical formula on the base of 7 apfu is Ag2.99Sb1.01S2.99.
Barytová mineralizace v granodioritovém porfyritu z Bělovsi u Náchoda (orlicko-sněžnické krystalinikum, Česká republika)
Authors: Kovář Michal , Dolníček Zdeněk
Published: October 2020

A new occurrence of baryte mineralization at Běloves near Náchod is bound to a steep NNE-SSW trending fissure in a dyke of granodiorite porphyrite, which cut phyllites of the Nové Město Group (Orlica-Sněžník Crystalline Complex). The mineralization is composed of three generations of baryte differing in Sr contents (~0.10 apfu in the oldest generation, ~0.003 apfu in the youngest generation) and small amount of hematite. The primary fluid inclusions in baryte belong to type L and L+V; the variable phase proportions are probably caused by postdepositional damage of part of the present fluid inclusions. The wide range of temperatures of both initial melting (-40 to -1 °C) and final ice melting (-0.3 to -12.3 °C) suggests involvement of fluids with very variable salt systems and salinities. The δ34S values of baryte range between +5.5 and +7.1 ‰ CDT. The mineral composition, chemical composition of minerals and fluid inclusion data suggest that the studied mineralization is similar to Late Variscan vein baryte and mineralizations of the Bohemian Massif. The source of fluids is interpreted in evaporated fresh waters of Permian lakes, which occurred in the adjacent Krkonoše Piedmont Basin during the Permian.
Grosulár a diopsid v kryštalických vápencoch z lokality Čučma - Čierna baňa (Slovenská republika)
Authors: Ružička Peter , Bačík Peter , Myšľan Pavol , Kurylo Sergii
Published: October 2020

The identified mineral association in the crystalline limestones from the manganese locality Čučma - Čierna baňa consists of garnets and pyroxenes. Mineralogical composition of the samples Ču-1 and Ču-2 is represented by zonal garnets with Grs76.12-82.31; Adr17.69-23.88 composition in the core and Grs95.48-97.05; Adr2.95-4.52 composition in the rim. In the sample Ču-3 inverse zonality (the core Adr3.99, Grs96.01; the rim Adr20.55, Grs79.45) of garnet is observable. The analyzed pyroxenes have a diopside composition with a variable Mg/(Mg+Fe2+) ratio. A slightly increased content of Mn (up to 0.09 apfu) ascends into the johannsenite molecule.
Hydrotermální mineralizace s dickitem v ordovických jílovcích bohdaleckého souvrství z tunelu metra linky D v Praze na Pankráci
Authors: Dolníček Zdeněk , Stöhr Petr , Ulmanová Jana , Vrtiška Luboš , Malíková Radana
Published: October 2020

Two types of hydrothermal veins were found in the Ordovician claystones of the Bohdalec Formation (Barrandian, Prague Basin) during the excavation of tunnel of subway Line D at Prague-Pankrác site. The first type is represented by short hair-thin veinlets of various directions fulfilled by dickite. The second type comprises thicker NNW - SSE trending veins with prevailing quartz, which cut the host rocks across the whole width of the gallery. In addition to quartz, they contain also dickite, chlorite (thuringite-chamosite), carbonates of dolomite-ankerite series (Dol37.5-44.0Ank42.0-46.8Ktn10.9-16.1), calcite, fluorapatite, pyrite (with up to 0.5 wt. % Mn), galena (with ~0.6 wt. % Se) and sphalerite (with ~1 wt. % Fe and up to 0.35 wt. % Sn and 0.36 wt. % Cu). Except for calcite, which forms younger veinlets in older quartz fill, all other mentioned minerals form minute inclusions enclosed in quartz, which are arranged parallel with outer margin of the vein. Based on mineral assemblage and chemical composition of individual minerals, highly variable crystallization temperatures (<100 - 350 °C) can be interpreted in various mineralogically distinct domains of the quartz vein. We assume a polyphase, episodic origin of individual domains of the vein fill, close to the crack-seal mechanism, which was bound to successive evolution of the adjacent fault structure. The maximum formation temperatures exceeding by a value of ca. 100 °C the highest reported temperatures of Variscan thermal overprint of Lower Paleozoic rocks of the Prague Basin are explained by production of friction heat in the fault structure. It is probable that part of parent fluids originated from sedimentary iron ores occurring in the host Ordovician sedimentary sequence.
Minerály řady ullmannit - gersdorffit v asociaci s milleritem z haldy dolu Lill v Příbrami (Česká republika)
Authors: Sejkora Jiří , Plášil Jakub , Špalek Jiří , Škácha Pavel
Published: October 2020

Minerals of the ullmannite–gersdorffite solid-solution was found at mine dump material from the Lill mine, the Černojamské ore deposit, Příbram, central Bohemia, Czech Republic. It forms grey groups of idiomorphic crystals up to 0.5 mm across with metallic luster on millerite crystals. It is strongly chemically zoned, from As-rich ullmannite to gersdorffite with variable Sb contents. Its unit-cell parameter, a 5.7728(13) Å and V 192.37(7) Å3, was refined from single-crystal X-ray data. Groups of acicular millerite crystals up to 4 mm in length and formula (Ni0.97Co0.03)Σ1.00S1.01 and very rare siegenite grains up to 80 μm and formula Co1.00(Ni1.66Co0.24Fe0.02)Σ1.92S4.09 were found in association.
Idősgondozás az ellátórendszeren kívül: A családi gondozók kihívásai
Authors: Tróbert Anett Mária , Széman Zsuzsa
Published: October 2020

A tartós gondozási rendszer túlterheltsége miatt egyre fontosabb a családi gondozók szerepe az idősellátásban. A gondozás felvállalása azonban jelentős megterheltséggel jár, melynek számos negatív következménye lehet a családi gondozók családi élete, munkavállalása, testi-lelki egészsége tekintetében. A jelenlegi hazai ellátórendszer kizárólag a gondozottak szükségleteire fókuszál, a családi gondozók támogatására még nincsenek szolgáltatások. Tanulmányunkban 10, családi gondozóval készített mélyinterjú tükrében ismertetjük legfontosabb nehézségeiket.
Az esztétikum szerepe az „aktív öregedés” - ben
Authors: Boga Bálint
Published: October 2020

A gerontológia az összes emberrel kapcsolatos diszciplínát magába foglalja abból a szempontból, hogy hogyan érinti az idős embert, más szóval: minden humán tudománynak van egy gerontológiai fejezete. Maslow összeállította az emberi szükségletek hierarchiáját, amelyek közé az esztétikai igényt is besorolta. Jelen dolgozat elsőként azt a témát tárgyalja, hogy az esztétikai igény hogyan változik az idősödés folyamán a saját test, a környezet, a művészi (vizuális és zenei) élmények vonatkozásában. Az aktív idősödés paradigma gyakorlati megvalósulása folyamatában, az életminőség javításában az esztétikai ingerhatásnak kiemelt szerepe van, vagy lehet és ezt akaratlagosan felhasználhatjuk erre a célra. Az esztétika a szellemi szféra felé is utat nyithat, ami idős korban igen fontos lehet.
The influence of training courses, customer relationship, and human resource management on customer focus among construction companies
Authors: Abadi Hooman , Neizari Mehdi
Published: October 2020

This study focuses on the influence of training courses, customer relationship and human resource management on customer focus among construction companies. This is due to the lack of information on its effectiveness. These problems may explain why the main players are less responsive to the implementation and practice of a mediating effect of Customer Relationship Management (CRM) and Human Resource management (HRM) on the relationship between Training Courses (TC) and Customer Focus (CF). It is essential that an appropriate model of CRM and HRM be used by administrators and professionals. The proposed model is based on the dependent variable, CF, and the independent variables, TC and mediator (CRM, HRM). This research is a descriptive-survey and inferential type based on the data collection method where parametric tests were used with the help of SPSS. The results of this research can be used in decision making, policy making, and also planning. In conclusion, it can be inferred that the relationship between CRM and HRM is still at its infancy stage, and as such, serious attention is needed among the players in the development of construction companies.
Leading the Change with Six Images of a Change Leader
Authors: Bamidele-Sadiq Mojibola
Published: October 2020

Change is constant, and it is a continuous norm. It has even been said that, “to refuse to change is to be left behind” (anonymous). While difficult, this is still something that both individuals and organizations must cope with. The world is constantly changing, which explains why individuals and organizations that are open to change continue to survive. Many researchers have argued that an organization may only achieve a successful change when there is effective leadership. Effective leaders are those who understand when to change and how much to change. The purpose of this paper is to reiterate the importance of leadership in implementing a successful and transformational change in an organization. It will further explore a body of literature that supports and identifies roles leaders take on in the change management process.
Transition from Linear to Circular Economy
Authors: Upadhayay Sugam , Alqassimi Omaima
Published: October 2020

The contemporary model of economical production and consumption is not sustainable; if the pattern continues, humankind will need to scramble for resources. Currently, resource extraction from the earth is 1.7 times higher than her actual capacity (Watts, 2018). This paper stresses the importance of the shift from the current linear (take, make and dispose) modality to a circular (take, make and reutilize) model to maximize the value from a product by keeping it in the loop of circularity. In pursuit of this change in model, reverse logistics, performance economy, and sharing economy all need to be integrated in order to facilitate regenerative and restorative techniques which enable reusing, recycling, remanufacturing and refurbishing of resources. Businesses need to redesign and restructure their current processes so that they can reduce the consumption of resources, thus developing a competitive edge. Incineration and dumping of resources should be the last option. The assets that are able to sense, record and communicate information are referred to as “intelligent assets” which innovates “smart solutions” to enable a circular economy (MacArthur, 2016). But this paradigm shift is not possible alone through the effort of a single entity. Involvement and commitments from individual, regional, governmental and intra-governmental levels are mandatory as it helps to create a synergist effect.
Peningkatan Kemampuan Mengenal Lambang Bilangan Melalui Metode Bermain Bola Bernomer Kelompok B TK Islam Terpadu Nurul Hidayah Sampang Tahun Pelajaran 2017/2018
Authors: Trisna Dewi
Published: October 2020

ABSTRAK: Penelitian ini bertujuan untuk meningkatkan kemampuan mengenal lambang bilangan melalui metode bermain bola bernomor anak kelompok B TK Islam Terpadu Nurul Hidayah Sampang tahun pelajaran 2017/2018. Penelitian ini adalah penelitian tindakan kelas kolaboratif. Data diambil dari anak kelompok  B TK Islam Terpadu Nurul Hidayah Sampang tahun pelajaran 2017/2018 sebanyak 30, laki-laki 18 dan perempuan 12 anak. Hasil penelitian pada siklus I  mencapai sebesar 43,30%, belum mengalami peningkatan dari pra siklus. Pada siklus II, tingkat keberhasilan mencapai 75,30%, melampuai standar  yang ditetapkan sebesar 70%.  Faktor-faktor yang mempengaruhi perkembangan kemampuan anak dalam melaksanakan pembelajaran mengenal lambang bilangan di antaranya: (1) faktor kematangan, (2) faktor pembentukan, (3) faktor minat dan bakat, dan (4) faktor kebebasan. Guru dapat menstimulasi kemampuan siswa dengan berbagai macam cara, salah satunya dengan permainan edukatif yang sering di gunakan anak usia dini, namun diperlukan ketelitian dan kehati-hatian dalam melatih untuk memusatkan perhatian anak. Oleh karana itu, pembelajaran model bermain bola bernomer dapat digunakan untuk meningkatkan kemampuan mengenal lambang bilangan, sehingga dapat digunakan dalam pembelajaran anak usia dini di TK Islam Terpadu Nurul Hidayah Sampang tahun pelajaran 2017/2018, serta dapat digunakan di tempat lain yang memiliki latar kondisi yang sama.
Editorial
Authors: Calatrava Juan , Dercelles Arnaud , Torres Cueco Jorge
Published: October 2020

Ediatorial Núm. 2 LC. Revue de recherches sur Le Corbusier.
Estimating daily full-coverage and high-accuracy 5-km ambient particulate matters across China: considering their precursors and chemical compositions
Authors: Wang Yuan , Yuan Qiangqiang , Li Tongwen , Tan Siyu , Zhang Liangpei
Published: October 2020

Abstract. The ambient concentrations of particulate matters (PM2.5 and PM10) are significant indicators for monitoring the air quality relevant to living conditions. Most of the existing approaches for the estimation of PM2.5 and PM10 employed the remote sensing Aerosol Optical Depth (AOD) products as the main variate. Nevertheless, the coverage of missing data is generally large in AOD products, which can cause inconvenience to the researchers. To efficiently address this issue, our study explores a novel approach using the datasets of the precursors and chemical compositions for PM2.5 and PM10 instead of AOD products. Specifically, the daily full-coverage ambient concentrations of PM2.5 and PM10 are estimated at 5-km (0.05°) spatial girds across China based on Sentinel-5P and GEOS-FP. In this paper, the Light Gradient Boosting Machine is exploited to train the estimation models, which will fully fuse the multi-source data. For comparison, the Deep Blue AOD product from VIIRS is adopted in a similar framework as a baseline (AOD-based). The validation results show that the ambient concentrations are well estimated through the proposed approach, with the sample-based Cross-Validation R2s and RMSEs of 0.93 (0.9) and 8.982 (17.604) μg/m3 for PM2.5 (PM10), respectively. Meanwhile, the proposed approach achieves better performance than the AOD-based in different cases (e.g., overall and seasonal). Compared to the related previous works over China, the estimation accuracy of our method is also satisfactory. Furthermore, all the variates of the precursors and chemical compositions for PM2.5 and PM10 positively contribute to the estimation in the proposed approach, as expected. With regard to the mapping, the estimated results through the proposed approach present consecutive spatial distribution and can exactly express the seasonal variations of PM2.5 and PM10. It is concluded that the full-coverage estimated results in our study are conducive to the researches on PM2.5 and PM10 over the regions where the AOD values are missing.
Performance of open-path GasFinder3 devices for CH4 concentration measurements close to ambient levels
Authors: Häni Christoph , Bühler Marcel , Neftel Albrecht , Ammann Christof , Kupper Thomas
Published: October 2020

Abstract. Open-path measurements of methane (CH4) with the use of GasFinder systems has been frequently used for emission estimation with the inverse dispersion method (IDM), specifically from agricultural sources. It is common to many IDM applications that the concentration enhancement related to agricultural CH4 sources is small, typically between 0.05 and 0.5 ppm, and accurate measurements of CH4 concentrations are needed at concentrations close to ambient levels. The GasFinder3-OP (GF3) device for open-path CH4 measurements is the latest version of the commercial GasFinder systems by Boreal Laser Inc. We investigated the uncertainty of six GF3 devices from side by side intercomparison measurements and comparisons to a closed-path quantum cascade laser device. Relative biases as high as 8.3 % were found and a precision between 2.1 and 10.6 ppm-m was estimated. These results deviate from the respective manufacturer specifications of 2 % and 0.5 ppm-m. Intercalibration of the GF3 devices by linear regression to remove measurement bias was shown to be of limited value due to drifts and step changes in the recorded GF3 concentrations.
Volcanic SO2 Effective Layer Height Retrieval for OMI Using a Machine Learning Approach
Authors: Fedkin Nikita M. , Li Can , Krotkov Nickolay A. , Hedelt Pascal , Loyola Diego G. , Dickerson Russell R. , Spurr Robert
Published: October 2020

Abstract. Information about the height and loading of sulfur dioxide (SO2) plumes from volcanic eruptions is crucial for aviation safety and for assessing the effect of sulfate aerosols on climate. While SO2 layer height has been successfully retrieved from backscattered Earthshine ultraviolet (UV) radiances measured by the Ozone Monitoring Instrument (OMI), previously demonstrated techniques are computationally intensive and not suitable for near real-time applications. In this study, we introduce a new OMI algorithm for fast retrievals of effective volcanic SO2 layer height. We apply the Full Physics Inverse Learning Machine (FP_ILM) algorithm to OMI radiances in the spectral range of 310–330 nm. This approach consists of a training phase that utilizes extensive radiative transfer calculations to generate a large dataset of synthetic radiance spectra for geophysical parameters representing the OMI measurement conditions. The principal components of the spectra from this dataset in addition to a few geophysical parameters are used to train a neural network to solve the inverse problem and predict the SO2 layer height. This is followed by applying the trained inverse model to real OMI measurements to retrieve the effective SO2 plume heights. The algorithm has been tested on several major eruptions during the OMI data record. The results for the 2008 Kasatochi, 2014 Kelud, 2015 Calbuco, and 2019 Raikoke eruption cases are presented here and compared with volcanic plume heights estimated with other satellite sensors. For the most part, OMI-retrieved effective SO2 heights agree well with the lidar measurements of aerosol layer height from Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) and thermal infrared retrievals of SO2 heights from the infrared atmospheric sounding interferometer (IASI). The errors in OMI retrieved SO2 heights are estimated to be 1–1.5 km for plumes with relatively large SO2 signals (> 40 DU). The algorithm is very fast and retrieves plume height in less than 10 min for an entire OMI orbit. This approach offers a promising prospect of using physics-based machine learning applications to other instruments.
Wumuite (KAl0.33W2.67O9) – a new mineral with an HTB-type structure from the Panzhihua–Xichang region in China
Authors: Xue Yuan , Li Guowu , Xie Yingmei
Published: October 2020

Abstract. Wumuite, ideally KAl0.33W2.67O9, is a new mineral species found in the Neoproterozoic Sinian light-weathered biotite–quartz monzonite in the southern part of the Panzhihua–Xichang region (Nanyang village: 26∘46′8.21′′ N, 101∘27′13.86′′ E), China. It is associated with quartz, orthoclase, albite, biotite, hornblende, kaolinite, ilmenite, goethite, hematite, zircon, zoisite, tourmaline, monazite-(Ce), allanite-(Ce), scheelite, tellurite, tewite, and an unidentified, potentially new mineral corresponding to WO3. Wumuite occurs as light green hexagonal tabular crystals, is up to 0.3 mm in diameter, and has a vitreous to adamantine luster and a white streak; i.e., it is transparent. The mineral is brittle with good cleavage parallel to {101¯0} and {0001}. It has a Mohs hardness of about 5–6 and a calculated density of 6.52 g cm−3. Electron microprobe analyses yielded the following (in wt % – average of 10 spot analyses of one sample): K2O 5.55, WO3 91.16, TeO2 0.59, and Al2O3 2.52, with a total of 99.82. The empirical formula for wumuite calculated on the basis of Oapfu=9 is K0.80(W2.68Al0.34Te0.03)∑3.05O9, ideally K(W2.67Al0.33)∑3O9 or KAl0.33W2.67O9. The strongest four diffraction lines [d Å (I) (hkl)] are 6.261(36)(010), 3.727(30)(001), 3.161(100)(020), and 2.413(40)(021). Wumuite is hexagonal, in space group P6/mmm, with a=7.2952(5) Å, c=3.7711(3) Å, V=173.81(2) Å3, and Z=1. The crystal structure was solved and refined to a reliability factor of R1[F2>4σ(F2)]=0.025 (wR2=0.072) based on 164 unique reflections (777 measured reflections, R(int)=0.011). Wumuite has a hexagonal tungsten bronze (HTB)-type structure. The layers of corner-sharing [(W,Al)O]6 octahedra, with the layers oriented normal to the short (3.7713 Å) c repeat and along with the W–O–W links, connect to form a hexagonal ring channel (tunnel). K is distributed in the hexagonal channel. An associated new mineral, tewite, which was discovered in the same area, also has a new tungsten bronze (TB)-type-related structure and has a genetic connection with wumuite in both back-scattered electron (BSE) images and synthetic experiments. The formation of wumuite is likely related to the nearby quartz-vein-type Au mineralization. The mineral was formed by a metasomatic reaction between W-rich hydrothermal fluids and the potassium feldspar in the monzonite.
Uso de estrategias comunicativas para la habilidad de escucha y su relación con el nivel de inglés de estudiantes universitarios
Authors: Gómez Juan Fernando , Díaz Larenas Claudio
Published: October 2020

Las estrategias comunicativas ayudan a mitigar los problemas de comprensión al momento de aprender un idioma nuevo. En el presente estudio, se propone identificar la frecuencia de las estrategias comunicativas utilizadas por estudiantes universitarios que aprenden inglés para enfrentar las dificultades en la comprensión de mensajes orales, y analizar la relación entre el empleo de estas estrategias y su nivel lingüístico en el idioma. Se realizó un estudio transversal descriptivo, conformado por 542 estudiantes; se empleó el instrumento OCSI (Oral Communication Strategy Inventory), aplicando el cuestionario correspondiente a la habilidad de escucha. Los datos se analizaron mediante estadística descriptiva e inferencial, encontrándose que las estrategias más empleadas corresponden a las de negociación del significado, no-verbales y de orientación hacia las palabras. No se hallaron diferencias entre los niveles A2 (básico) y B1 (intermedio) en cuanto al uso de las estrategias.
Intervención participativa y transformadora con madres en un centro escolar
Authors: Donato Donatella , San Martín Alonso Ángel
Published: October 2020

En un barrio de la ciudad de Valencia, dos grupos de mujeres, uno de cultura gitana y otro de no gitana, junto con el profesorado y las familias de la escuela pública, inician un recorrido de conocimiento y transformación mutuos. En el citado barrio y en el centro escolar se habían detectado problemas de convivencia entre los grupos de diferentes culturas. El proyecto se basa en una pedagogía comprometida con la investigación-acción participativa y transformativa de la comunidad que hunde sus raíces en las narrativas, en la reflexión y en la práctica transformadora. En el diseño y seguimiento del proyecto, aplicamos una metodología etnográfica para analizar el conjunto de la realidad social del barrio, de la relación regenerativa entre actores escolares y de la coproducción del conocimiento. Este modelo de investigación se muestra comprometido con el contexto, contribuyendo a la identificación y resolución de problemas concretos. Para ello utilizamos recursos como la entrevista, la observación participante, el cuaderno de campo, la fotografía, la representación, etc. Los relatos así reconstruidos fueron analizados mediante unas rijillas validadas por jueces. De los resultados destacamos la constitución de dos grupos de madres que a partir de sus respectivas actividades desarrollaron procesos intersubjetivos de comunicación y elaboración de un relato sobre sus condiciones sociales y culturales como minoría. A partir de sus creaciones e implicación en diferentes actividades, ponen de manifiesto su empoderamiento como mujeres, su toma de conciencia crítica y la asunción colectiva de responsabilidades sobre la vida individual y colectiva en el centro/barrio. Por la naturaleza de la metodología empleada y para consolidar estos resultados provisionales, hemos de seguir implementando nuevos subproyectos. Continuidad que, por lo demás, la encontramos en otros trabajos realizados bajo el enfoque de la investigación participativa y transformadora.
The Differing Shades of Redface: The Evolving Image of Native Americans in Hollywood Comedies
Authors: Manning Adrian S. A.
Published: October 2020

Native Americans have consistently been misrepresented through humor directed at them in Hollywood film and television. This article explores how Hollywood humor stereotypes and distorts images of the Native American “other.” Relying on Louis Giannetti's genre development theory, which postulates that film genres evolve through four distinct stages (primitive, classical, revisionist, and parodic), it constructs a racial stereotype development theory to show how racial stereotypes similarly evolve and give rise to a fifth (satirical) stage of development. It also demonstrates that racial humor perpetuates further racial inequalities until the satirical stage, during which stereotypes are purposely challenged using the corrective strategies of satire.
Looking Backward—Fondly: Personal and Professional Texts/Contexts Derived from Knowing Lyman Tower Sargent for Forty Years
Authors: Barr Marleen S.
Published: October 2020

Lyman Tower Sargent has had a personal and professional impact upon me. I cannot separate the effects of reading his work from engaging with him as a mentor—and more. Hence, this piece will focus on personal and professional texts and their contexts. I revisit Sargent's “An Ambiguous Legacy: The Role and Position of Women in the English Eutopia,” an essay he contributed to my Future Females: A Critical Anthology (1981). I include passages from my novels Oy Pioneer! and Oy Feminist Planets: A Fake Memoir which describe protagonist Sondra Lear's relationship with Thurston Howell III, interactions stemming from my longstanding association with Sargent. I describe a prominent male scholar's positive—almost utopian—influence on what I am here calling a retrospective autobiographical portrait of the professor as a young woman. This piece emphasizes that a festschrift contribution is about reciprocity between author and honoree.
Thus, We Must Choose Utopia
Authors: Moylan Tom
Published: October 2020

Lyman Tower Sargent stands at the core of contemporary utopian studies. While the utopian proclivity to reach for a better world, and to reflect on how we think about and engage in that hope-ful practice, has been with us in most cultures for centuries, the scholarly field of utopian studies dates back to the 1960s; and from the beginning Lyman has been formative to its development. To situate this accomplishment, I believe he can be counted as one of a few singular intellectuals who have had such an impact on an entire field.