385 research outputs found
Propuesta de plan de manejo de residuos sólidos domiciliarios y agua residuales en la localidad de Maitencillo :estudio de un caso piloto en Cabañas Hermansen Cía. Ltda
No full textTesis (Administrador en Ecoturismo)Maitencillo, balneario ubicado en la Región de Valparaíso, Comuna de Puchuncaví,
es uno de los destinos turísticos más reconocidos a nivel regional y nacional para la
práctica del turismo del tipo sol y playa, esto debido a que posee diversidad de
playas, buen clima, amplia oferta gastronómica y hotelera, además de estar ubicado a
menos de dos horas de la capital nacional y a una hora y media de la capital regional.
Durante la época estival Maitencillo recibe una población flotante que sobrepasa con
creces el número de habitantes estables que tiene el balneario durante todo el resto
del año, llegando a generar un colapso a nivel general de la localidad. Maitencillo, a
pesar de su popularidad, todavía tiene un alto nivel de precariedad en lo que a
infraestructura turística respecta, existiendo una carencia de un sistema de
alcantarillado que permita una adecuada disposición de las aguas residuales, teniendo
que utilizar otras alternativas como son las fosas sépticas que actualmente están, de
forma progresiva, contaminando las napas subterráneas, como también de un servicio
de agua potable apropiado que permita abastecer a los habitantes del balneario,
teniendo que comprarla o que extraer el agua a través de pozos, agua que está poco a
poco siendo contaminada por la infiltración de aguas servidas. Tampoco posee un
sistema de tratamiento y disposición de residuos sólidos domiciliarios pertinente, no
existiendo en la comuna ni un vertedero o relleno sanitario, sino que un basural como
lugar de destino final de los residuos, esto por el incumplimiento del código
sanitario, además de la falta de una infraestructura apropiada.
Es por eso que considerando lo previamente planteado, se hace necesario generar un
cambio del actual modelo de gestión de aguas residuales, como de la forma de
disponer los residuos sólidos domiciliarios. Para lograr este objetivo, se propone por
medio de la siguiente investigación el desarrollo de una Propuesta de Plan de Manejo
de Residuos Sólidos y Aguas Residuales, que permita una mejora sustancial a la
problemática vigente, apostando por lograr un manejo sustentable. Para la
elaboración de la propuesta se trabajó con un caso de estudio, la empresa hotelera
Cabañas Hermansen y Cía. Ltda., la cual ha sido una de las empresas pioneras en Maitencillo, de manera de tener un ejemplo concreto con el cual trabajar y poder
aplicar la propuesta.Maitencillo, a resort located at Valparaíso Region, Puchuncaví Commune, is one of
the most famous tourist destinations at regional and national tourism practice of sun
and sand type, this is because it has a variety of beaches, great weather, wide range
of cuisine and hospitality, as well as being located less than two hours from the
national capital and an hour and a half of the regional capital.
During the summer Maitencillo receives a floating population that far exceeds the
amount of residents who have the town for the rest of the year, which generates a
general collapse at the resort. Maitencillo, despite its popularity, still has a high level
of precarity as far as tourism infrastructure is concerned, there is a lack of a sewage
system that allows for adequate sewage disposal, having to use alternatives such as
septic tanks currently are, progressing, contaminating the groundwater, as well as a
proper drinking water system to supply the inhabitants of the resort, having to buy or
to draw water from wells, water is slowly being polluted by the infiltration of
wastewater. Neither has a relevant system of treatment and solid waste disposal, not
existing in the commune or a dump or landfill, but a landfill as the final destination
of the waste, this breach of health code, in addition to lack of appropriate
infrastructure.
That's why considering the previously raised, it is necessary to generate a change of
the current model wastewater management, and the way to have domestic solid
waste. To achieve this goal, it is proposed by the following research the development
of a Management Plan Proposal for Solid Waste and Wastewater, which allows a
substantial improvement to the existing problems, opting for achieving sustainable
management. For the preparation of the proposal have worked with a case of study,
the hotel company Cabañas Hermansen y Cia Ltda, which has been one of the
pioneers in Maitencillo, in order to have a concrete example with which to work and
to apply the proposal
Organic livestock production systems and appropriate development in relation to public expectations
No full textThere has been a tremendous growth in numbers of organic farms in EU over the latest years – from below 20,000 farms in year 1992 to more than 120,000 farms in 1999 (Padel, 2001). Worldwide-certified organic production takes place in 130 countries, half of which are developing countries (ITC, 1999). The market share in EU, however, on total is still quite low ranging from less than 0.5% in nine out of 18 countries some countries to 5-9% in other countries for some major product groups (Michelsen et al., 1999).
Livestock production and especially ruminant livestock production forms an integral part of many organic farms due to its role in nutrient recycling on farms. Out of 16 European countries, livestock products were within the top five organic products in 14 countries (Michelsen et al., 1999). The market share of livestock products, however, is very different from product to product. In Austria, Denmark, Switzerland and Finland milk products are the most important organic products. Pork and poultry only play a minor role whereas eggs in some countries are quite important.
The recent development of organic farming in Europe is not only a matter of (marginal) agricultural change (Michelsen, 2001). It also represents an implantation of important aspects of recent major changes in society at large into agriculture. Essential vehicles in the development of the concept of organic farming are values expressing a general criticism of mainstream European agriculture and more general doubts about the interplay between man and nature as reflected in modern technology. In society at large these doubts have manifested themselves in growing political and public concern for the environment, increasing doubt regarding the importance of science in solving social problems, and increasing doubts about how society should be governed.
The actual development can be attributed to an increased consumer interest in organic products throughout Europe while, at the same time, farmers are interested in converting to organic production methods – often stimulated by governmental support or subsidies.
The main actors mentioned, however, do not necessarily have the same expectation to organic farming and the future development in organic farming in general as well as the individual livestock systems in particular may depend on to what degrees common expectations can be fulfilled. The aim of this paper is to highlight some expectations from main actors and to discuss the importance of this for the appropriate development of different livestock systems
Abnormalities of cardiac sympathetic innervation in arrhythmogenic right ventricular cardiomyopathy - Quantitative assessment of presynaptic norepinephrine reuptake and postsynaptic beta-adrenergic receptor density with positron emission tomography
No full textBackground-The frequent provocation of ventricular tachycardia by stress or catecholamines and the efficacy of antiarrhythmic drugs with antiadrenergic properties suggest an involvement of the cardiac adrenergic system in arrhythmogenesis in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC). Previous studies demonstrated abnormalities of the presynaptic uptake-1 assessed by I-123-MIBG-single-photon emission computed tomography. Methods and Results-This study investigated neuronal reuptake of norepinephrine (uptake-1) and beta-adrenergic receptor density in 8 patients with ARVC and 39 age-matched control subjects. All subjects underwent positron emission tomography with the volume of distribution (V-d) of [C-11]hydroxyephedrine (C-11-HED) used to assess presynaptic norepinephrine reuptake, the maximum binding capacity (B-max) of [C-11]CGP-12177 (C-11-CGP-12177) to assess postsynaptic beta-adrenergic receptor density, and [O-15]H2O for quantification of myocardial blood now. Patients with ARVC demonstrated a highly significant global reduction in postsynaptic beta-adrenergic receptor density compared with that in control subjects (B-max of C-11-CGP-12177: 5.9+/-1.3 vs 10.2+/-2.9 pmol/g tissue, P<0.0007), whereas the presynaptic uptake-1 tended toward reduction only (V-d of C-11-HED: 59.1+/-25.2 vs 71.0+/-18.8 mL/g tissue, NS). There were no differences in myocardial blood now between the groups, and plasma norepinephrine was within normal limits in patients and control subjects. Conclusions-The findings demonstrate a significant reduction of myocardial beta-adrenergic receptor density in patients with ARVC. This may result from a secondary downregulation after increased local synaptic norepinephrine levels caused by increased firing rates of the efferent neurons or as the result of impaired presynaptic catecholamine reuptake. These findings give new insights into the pathophysiology of arrhythmogenesis in ARVC, with potential impact on diagnostic evaluation and therapeutic management
1936 School Grades 8-9
No full textPhotograph of the Danevang School class of 1936, consisting of adolescent boys and girls, in front of a building. Three windows are seen in the back. The seated front row, from left to right, has been identified as Jack Wind, Herolf Jensen, Viggo Hermansen, Leo Allenson, Dorothy Mae Krenek, Magdalene Thyssen, Dagmar Thyssen, Merle Longwood, and Ingeborg Thyssen. The second row, from left to right: Mr. Elvin Praytor, Fatty (Ernie) Invardsen, unknown, Pearl Juhl, and Johanna Larsen. Third row, from left to right: Dorabell Hansen, Ella Nielsen, Magdalene Thyssen, Johanna Harton, Edith Jensen, and Mrs. Laure Praytor. The back row, from left to right: Leo Westerholm, Otto Thyssen, Willard Longwood, Henry Nielsen, unknown, Harry Hermansen, Siguard Thyssen, and unknown
“Freedom” of the Press: British Propaganda and Systems of Self-Censorship in the First World War
No full textDuring the First World War the British Parliament developed a propaganda apparatus which relied heavily on the burgeoning press industry, centralized under the ownership of a small number of wealthy men, to control the public narrative surrounding the war. This essay will contextualize the foundation of the state-press partnership and the role the press played in the control of public opinion during the war. Additionally, using two specific elements of Herman and Chomsky's propaganda model, it will show that the complacency of the press in producing and reproducing state propaganda during World War I was a result of self-censorship systems fundamentally built into the news media industry.Peer reviewe
Gas fluxes and biological and physiochemical measurements made across an Arctic forefield.
No full textHalocarbon fluxes measured using dynamic flux chambers across a retreating glacier's forefield, at Midtre Lovenbreen, Svalbard. Also included in this dataset, are physiochemical and biological parameters of the soil where each chamber measurement was conducted. If using this data, please cite: Macdonald, M.L., Wadham, J.L., Young, D., O'Dohery, S., Lunder, C., Hermansen, O., Lamarche-Gagnon, G., (2019). Consumption of CH3Cl, CH3Br and CH3I and emission of CHCl3, CHBr3 and CH2Br2 from a retreating Arctic glacier’s forefield. JOURNAL, VOL, ISSUE. doi: XXX
Produktions- og miljømæssig samt økonomisk vurdering af økologiske svineproduktionssystemer baseret på slagtesvins fouragering
No full textI økologisk svineproduktion som den foregår i Danmark i dag, har søer på friland i vid udstrækning mulighed for at udføre naturlig adfærd. Både søer og slagtesvin får tildelt grovfoder, har relativt meget plads at bevæge sige på og har adgang til friland og udendørs arealer. Disse fordele menes at være basis for det lave antibiotikaforbrug der ses i den økologiske svineproduktion (Bonde & Sørensen, 2004; Edwards, 2005).
Der er imidlertid også en række ulemper af miljø- og velfærdsmæssig karakter knyttet til især den økologiske slagtesvineproduktion. Stort set alle slagtesvin kommer på stald i forbindelse med fravænning, hvor de har adgang til udendørsarealer med beton underlag (Hermansen et al., 2005). Dermed har grisene ikke samme mulighed for at udføre naturlig adfærd såsom eksempelvis rodeadfærd, som ved frilandsproduktion. Desuden tildeles slagtesvinene betydelige mængder kraftfoder i form af bl.a. proteinfoder og korn. Går grisene på friland bidrager det til en kraftig næringsstofbelastning, og dermed forøges risikoen for kvælstoftab til omgivelserne (Eriksen & Kristensen 2001; Sommer et al., 2001; Hermansen et al. 2004; Quintern & Sundrum 2006). Kun ca. 30 % af det kvælstof som slagtesvin indtager med foderet tilbageholdes i grisene indtil slagtning (Eriksen et al., 2006). Studier har vist et kvælstof overskud per hektar på 270 kg N med 71 grise ha-1 (Salomon et al., 2007) og 388 og 507 kg N ha-1 i systemer med 91 grise ha-1 hvor der fodres henholdsvis restriktivt og ad libitum (Eriksen et al., 2006).
I teorien vil det være muligt at reducere den økologiske svineproduktions næringsstofbelastning samt i endnu højere grad give grisene mulighed for at udføre naturlig adfærd ved at øge grisenes indtag af føde fra de arealer de beslaglægger. Udgangspunktet er grisens opportunistiske altædende natur og dens unikke evne til at fouragere både under og over jordoverfladen (Andresen, 2000; Beattie & O´Connell, 2002). Tidligere studier har vist, at drægtige søer kan hente op til 60 % af deres næringsbehov ved afgræsning af kløvergræs (Fernandez et al., 2006). I nylige forsøg er det fundet, at slagtesvin kan hente 20-25 % af deres energibehov ved fouragering på kløvergræs (Kongsted & Therkildsen, 2014) og lucerne (Jakobsen og Kongsted, 2014) samt op til 60 % ved fouragering på jordskokker (Kongsted et al., 2013), såfremt de fodres restriktivt med kraftfoder. Det giver en 10-60 % bedre ’foderudnyttelse’ vurderet som kg kraftfoder per kg tilvækst, men samtidig en reduktion i tilvækst. Tilsvarende tyder det på, at protein indtaget fra afgræsset lucerne kan udgøre op til 40 % af slagtesvins samlede proteinindtag ved fouragering på en veletableret lucernemark (Jakobsen, 2014). Forsøgsresultaterne demonstrerer et potentiale for at reducere forbruget af kraftfoder i økologisk svineproduktion ved i højere grad at tænke direkte fouragering ind i svinesædskiftet.
Det er imidlertid uvist, hvilke konsekvenser det har for den samlede bedrifts miljøaftryk og økonomi, at slagtesvinene i højere grad integreres i sædskiftet. Formålet med nærværende rapport er at analysere og vurdere de produktions- og miljømæssige samt økonomiske resultater ved tre forskellige systemer:
1) Søer på kløvergræs og slagtesvin på stald
2) Søer og slagtesvin på kløvergræs
3) Søer på kløvergræs og slagtesvin på jordskokker, lucerne og kløvergræ
Finding topological structure in neural ensemble activity
No full textFinding topological structure in neural ensemble activity
Recent breakthroughs in electrophysiological recordings and calcium imaging have unlocked the potential for understanding how groups of neurons work together. However, the amount of data and the complexity of the brain elicits a need for more advanced tools to interpret the data.
In this regard, topological data analysis (TDA) has proven fruitful, revealing topological and geometrical structure in spatially modulated neurons, signifying a step forward in understanding the computations performed by these cells. TDA has seen rapid development in recent years, yet, state-of the-art methods are still sensitive to the noise and size of experimental data.
Here, we investigated the use of topological tools in recorded neural data, specifically developing computational frameworks based on persistent cohomology for finding topological structure in the collective computations of neural ensembles. Through a noise-robust geodesic approximation based on a uniformity assumption, we revealed a toroidal population state space in grid cells – neurons which are highly active in spatially confined regions, forming a hexagonal pattern in a two-dimensional environment. We described the internal organization of the population activity without reference to a specific physical covariate and showed the topology to be preserved across different environments as well as in sleep. This was furthered by, in an unsupervised manner, finding and analyzing the topological structure of ensembles of entorhinal neurons in head-fixed mice, showcasing the potential of TDA in unravelling internal brain dynamics without assumptions about the function of the cells. Moreover, we suggest a novel pipeline for identifying the functional structure of neural ensembles, exploiting the duality in analyzing both spike trains and population vectors – i.e., both the rows and columns of the same matrix – which reveals complementary information.
Oppdage topologisk struktur i nevral populasjonsaktivitet
Gjennombrudd innen elektrofysiologi og kalsiumavbildning for måling av hjerneaktivitet gjør at vi i dag kan få innsikt i store komplekse nettverk av nevroner. Samtidig nødvendiggjør dette avanserte matematiske metoder og modeller for å forstå samspillet mellom nevroner og beregningene grupper av nevroner gjør.
Avhandlingen «Finding topological structure in neural ensemble activity” undersøker hvordan bruk av topologiske metoder kan påvise en topologiske struktur i nevrale populasjoner. Ved utvikling av et analyserammeverk basert på persistent kohomologi påviser arbeidet at aktiviteten til nettverket av gitterceller i hjernen til en rotte er begrenset til en torus. Det vil si at cellene danner en to-dimensjonal, periodisk beskrivelse, eller en «smultring»-lignende representasjon, av rommet rottene navigerer i. Aktiviteten i cellenettverket beholder torus-strukturen i forskjellige miljøer og under søvn.
Avhandlingen foreslår også en ny fremgangsmåte for identifikasjon av den funksjonelle strukturen til nevrale populasjoner. ved hjelp av en dualitet mellom korrelasjonsstrukturen til cellene og det rommet nevronenes fyringsaktivitet beveger seg innenfor. Arbeidet i avhandlingen viser at analyserammeverket også er appliserbart i eksperimenter gjort på hodefikserte mus, samt uten tilgang til musenes bevegelsesoppførsel. Vi kan nå si at en torus-struktur finnes i nevrale nettverk i entorhinal cortex, og overraskende nok ser vi at den påviste to-dimensjonaliteten overgår den en-dimensjonale, atferdsmessige oppførselen i eksperimentet
Fra Ægypteninteresse til Ægypteninspiration i <em>Sinuhe</em>
No full textThe Finnish author Mika Waltari wrote the best-selling novel The Egyptian in 1945, inspired by the hopes, disappointments and disasters of the previous decades. The book occasioned widespread interest in Ancient Egypt, due in part to an effective reworking of egyptological knowledge into a classic moral tale. The fact that some egyptologists had already viewed the Amarna period within a Christian moral context would have been a source of inspiration to Waltari. Arthur Weigall, the British author and egyptologist, is a good, though hitherto unacknowledged example of this. In transforming his egyptological interests into a historical novel, Waltari found a ready model in Weigall's depiction of an Egyptian Phatraoh with a Christian morality.</p
Danevang School
No full textCopy print of a photograph of the students and teachers of the Danevang School during the 1937-1938 school year. The oldest students appear to be standing at the back, and the youngest are sitting in the front with a plaque that says "Danevang School 1937-1938 Larue Praytor Principal. The group is outside with the school building in the background. According to accompanying information the teachers were Mrs. Edwards, Dorothy Hermansen, Mrs. Bell, Juliane Hvilholt, and Mrs. Inex Praytor.
Back row: Dorothy Hermansen, Mrs. Bell, Alfred Jensen, Carl Larsen, Viggo Thyssen, Helga Christensen, Agneta Hermansen, Dagny Thyssen, Edgar Hansen, Otto Thicken, unknown, Benedict Krag, unknown, O. V. "Mickey" Christensen, Iver Wind, Siguard Thyssen, Dora Harton, Melvin Hansen, Leo Westerholm, Dorothy Mae Krenek, Ella Nielsen, Helena Berndt, Harvey Westerholm, and Juliane Hvilholt.
Second row: Evelyn Frost, Isabel Nielsen, Clifford Allenson, Evelyn Hansen, Inger Nelsen, Kermit Westerholm, Anders Thyssen, Gerda Thyssen, Helga Christensen, Clara Brodsgaard, Robert "Bob" Hansen, Alma Harton, Alice Hvilholt, Helen Wind, Clara Marie Jensen, Gwendolyn Praytor, Fern Hermansen, and Elsie Lee Chritiansen.
Third row: Preston Hicks, A. R. Zieschang, unknown, unknown, Martin Strarup, Alfred Wind, unknown, Alfred Thyssen, Harold Wind, Daniel Nelsen, Olaf Larsen, Alton Nelsen, Lloyd Nielsen, Vernon Christiansen, Vernor Harton, Merle Lee Johnson, and Gunnar Thyssen.
Fourth row: unknown, unknown, Carl Hansen, Vernon Swendsen, Lawrence Petersen, Donald Lykke, Leroy Strarup, Johannes "Jack" Hansen, Irvin Wind, Shirley Strarup, Joyce Hansen, Gernell Johnson, Lillie Jensen, unknown, Julian Christiansen, Irene Hansen, and Irene Saman
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