MODEL OF CROATIAN SEA PASSENGER PORTS MANAGEMENT RATIONALIZATION

Predmet istraživanja u ovome znanstvenom radu je razvitak pomorskoputničkih luka u Republici Hrvatskoj do 2012. godine. Za definiranje svojstava i determinanti pomorskoputničkih luka koristilo se modelom na bazi matrice rasta. Analiza i vrednovanje pojedinih elemenata modela i dobivene izravne stope rasta imale su za cilj znanstveno formulirati rezultate istraživanja, prema najvažnijim teorijskim zakonitostima razvitka pomorskoputničkih luka u Republici Hrvatskoj. Autori su se u znanstvenom istraživanju i prezentiranju rezultata istraživanja ovog rada služili kombinaciju znanstvenih metoda kao što su: metoda analize i sinteze, metoda konkretizacije, komparativna metoda i metoda modeliranja (matrica rasta). Glavna znanstvena hipoteza dokazana je izravnim stopama rasta odabranih elemenata modela a ona glasi: Znanstveno utemeljenim spoznajama o funkcioniranju i poslovanju sustava pomorskoputničkih luka moguće je predložiti model, mjere i aktivnosti za racionalno upravljanje tim lukama kako bi se osigurao rast i razvoj sustava pomorskoputničkih luka.This paper analyses the sustainable development of sea passenger ports in the Republic of Croatia until 2012. A model of growth was used in order to define the main characteristics and determinants of sea passenger ports. The purpose of the paper was to present a scientifically-based formulation of sustainable development analysis of sea passenger ports in Croatia, based on the evaluation and analysis of relevant elements and resulting direct rates. The authors in their scientific research and presentation used a various combination of scientific methods like: analysis and syntheses method, concretization method, comparative method and modeling method (growth matrix). The main scientific hypothesis is: By using scientifically based acknowledgments about functioning and management of sea passenger port system it is possible to suggest a model, measurements and activities for the rational management of sea passenger ports in Croatia in order to secure their growth and development. This scientific hypothesis was confirmed by the direct rates of growth of the model elements

Synthesis of Atactic and Isotactic Poly(1,2-glycerol carbonate)s: Degradable Polymers for Biomedical and Pharmaceutical Applications

The synthesis and characterization of atactic and isotactic linear poly­(benzyl 1,2-glycerol carbonate)­s are reported. The poly­(benzyl 1,2-glycerol carbonate)­s were obtained via the ring-opening copolymerization of <i>rac-</i>/(<i>R</i>)<i>-</i>benzyl glycidyl ether with CO₂ using [SalcyCo^IIIX] complexes with high carbonate linkage selectivity and polymer/cyclic carbonate selectivity (>99%). Deprotection of the resultant polymers afforded poly­(1,2-glycerol carbonate)­s with a functionalizable pendant primary hydroxyl group. Poly­(1,2-glycerol carbonate) showed a remarkable increase in degradation rate compared to poly­(1,3-glycerol carbonate) with a <i>t</i>_1/2 ≈ 2–3 days. These polymers fulfill an unmet need for a readily degradable biocompatible polycarbonate

Improved Efficiency and Enhanced Color Quality of Light-Emitting Diodes with Quantum Dot and Organic Hybrid Tandem Structure

Light-emitting diodes based on organic (OLEDs) and colloidal quantum dot (QLEDs) are widely considered as next-generation display technologies because of their attractive advantages such as self-emitting and flexible form factor. The OLEDs exhibit relatively high efficiency, but their color saturation is quite poor compared with that of QLEDs. In contrast, the QLEDs show very pure color emission, but their efficiency is lower than that of OLEDs currently. To combine the advantages and compensate for the weaknesses of each other, we propose a hybrid tandem structure which integrates both OLED and QLED in a single device architecture. With ZnMgO/Al/HATCN interconnecting layer, hybrid tandem LEDs are successfully fabricated. The demonstrated hybrid tandem devices feature high efficiency and high color saturation simultaneously; for example, the devices exhibit maximum current efficiency and external quantum efficiency of 96.28 cd/A and 25.90%, respectively. Meanwhile, the full width at half-maximum of the emission spectra is remarkably reduced from 68 to 44 nm. With the proposed hybrid tandem structure, the color gamut of the displays can be effectively increased from 81% to 100% NTSC. The results indicate that the advantages of different LED technologies can be combined in a hybrid tandem structure

Efficient Red/Green/Blue Tandem Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency Exceeding 21%

Highly efficient tandem quantum-dot light-emitting diodes (QLEDs) are developed by using an interconnecting layer (ICL) with the structure of ZnMgO/Al/HATCN/MoO₃. The developed ICL exhibits high transparency, efficient charge generation/injection capability, and high robustness to resist solvent damage during deposition of the upper functional layers. With the proposed ICL, full color (red/green/blue, R/G/B) tandem QLEDs are demonstrated with extremely high current efficiency and external quantum efficiency (EQE): 17.9 cd/A and 21.4% for B-QLEDs, 121.5 cd/A and 27.6% for G-QLEDs, 41.5 cd/A and 23.1% for R-QLEDs. To the best of our knowledge, these are the highest values ever reported. In addition, the EQEs of R-, G-, and B-QLEDs all exceed 21%. The high efficiency can be well maintained over a wide range of luminance from 10² to 10⁴ cd/m². For example, even at a high brightness of 20 000 cd/m², the EQE of R-, G-, and B-QLEDs can still sustain its 96%, 99%, and 78% maximum value, respectively. The demonstrated full-color tandem QLEDs, with extremely high efficiency, long operational lifetime, low roll-off efficiency, and high color purity, would be ideal candidates to bring QLEDs into the next generation of full-color displays and the solid-state lighting market

High Sensing Properties of 3 wt % Pd-Doped SmFe_1–<i>x</i>Mg_<i>x</i>O₃ Nanocrystalline Powders to Acetone Vapor with Ultralow Concentrations under Light Illumination

Nanocrystalline powders of 3 wt % Pd-doped SmFe_1–<i>x</i>Mg_<i>x</i>O₃ (<i>x</i> = 0, 0.1, 0.2, and 0.3) were prepared by a sol–gel method and annealed at 750 °C. Pd:SmFe_0.9Mg_0.1O₃ has a maximum response at 220 °C. When exposed to 0.5 ppm acetone vapor, the response of undoped SmFeO₃ is 2.26 and the response of Pd:SmFe_0.9Mg_0.1O₃ is 7.16. Under light illumination, Pd:SmFe_0.9Mg_0.1O₃ has a better sensing performance and lower optimal operating temperature. The sensor shows good selectivity and stability for acetone vapor. The high response and good selectivity of Pd:SmFe_0.9Mg_0.1O₃ to ultralow concentrations of acetone vapor indicate its potential for applications in many areas

Additional file 1 of Association between dietary knowledge and overweight/obesity in Chinese children and adolescents aged 8–18 years: a cross-sectional study

Additional file 1: Supplementary Table 1. International cut off points for body mass index for overweight and obesity by sex between 2 and 18 years, defined to pass through body mass index of 25 and 30 kg/m2 at age 18, obtained by averaging data from Brazil, Great Britain, Hong Kong, Netherlands, Singapore, and United States [1]. Supplementary Table 2. Sensitivity analysis of interpolation data. Supplementary Table 3. The association between diet knowledge and overweight and obesity in children and adolescents

Inverted Quantum-Dot Light-Emitting Diodes Fabricated by All-Solution Processing

All-solution processed, multilayer, and inverted quantum-dot light-emitting diodes (QD-LEDs) are developed in this work. To protect the QDs from dissolving by the solvents of upper layers, the solvents of poly­(9-vinlycarbazole) (PVK) hole transporting layer are first investigated. The QD layer has been less affected by <i>o</i>-dichlorobenzene solvent than other typical solvents like chloroform and chlorobenzene. Second, to deposit a hydrophilic poly­(ethylenedioxythiophene)/polystyrenesulfonate (PEDOT:PSS) hole injection layer on top of hydrophobic PVK, the surface energy of the PEDOT:PSS is reduced by using isopropanol as the additive. With optimized conditions, the demonstrated QD-LEDs exhibit a maximum luminance of 16290 cd/m² and a peak current efficiency of 4.1 cd/A, which is the highest among the reported values. These results may offer a practicable platform for further research, leading to the achievement of all-solution processed, multilayer, and efficient inverted QD-LEDs

Synthesis and Characterization of Poly(glyceric Acid Carbonate): A Degradable Analogue of Poly(acrylic Acid)

The synthesis and characterization of a degradable version of poly­(acrylic acid), poly­(glyceric acid carbonate), are reported. Specifically, atactic and isotactic poly­(benzyl glycidate carbonate)­s are obtained via the ring-opening copolymerization of <i>rac</i>-/(<i>R</i>)-benzyl glycidate with CO₂ using a bifunctional <i>rac</i>-/(<i>S</i>,<i>S</i>)-cobalt salen catalyst in high carbonate linkage selectivity (>99%) and polymer/cyclic carbonate selectivity (∼90%). Atactic poly­(benzyl glycidate carbonate) is an amorphous material with a <i>T</i>_g (glass transition temperature) of 44 °C, while its isotactic counterpart synthesized from enantiopure epoxide and catalyst is semicrystalline with a <i>T</i>_m (melting temperature) = 87 °C. Hydrogenolysis of the resultant polymers affords the poly­(glyceric acid carbonate). Poly­(glyceric acid carbonate) exhibits an improved cell cytotoxicity profile compared to poly­(acrylic acid). Poly­(glyceric acid carbonate)­s also degrade remarkably fast (<i>t</i>_1/2 ≈ 2 weeks) compared to poly­(acrylic acid). Cross-linked hydrogels prepared from poly­(glyceric acid carbonate) and poly­(ethylene glycol) diaziridine show significant degradation in pH 8.4 aqueous buffer solution compared to similarly prepared hydrogels from poly­(acrylic acid) and poly­(ethylene glycol) diaziridine

Table1_Malignant peritoneal mesothelioma presenting with bilateral hydronephrosis and renal insufficiency: a case report and literature review.docx

IntroductionMalignant peritoneal mesothelioma (MPM) is an extremely rare tumor with nonspecific clinical manifestations, making diagnosis challenging.Case presentationHerein, we report a case of MPM with occult onset presenting with bilateral hydronephrosis and renal insufficiency. A 30-year-old man was admitted to the Urology Department because of recurrent bilateral lower back pain. The etiology was unclear after a series of laboratory tests, imaging examinations, bone marrow aspiration, renal puncture biopsy, ascites examination, ureteroscopy, and so on. Finally, MPM was diagnosed by laparoscopic exploration and biopsy. Moreover, during the course of the disease, the patient's bilateral ureters were compressed, and the obstruction could not be relieved after the placement of ordinary ureteral stents. Percutaneous nephrostomy or metal ureteral stenosis was appropriate in managing malignant ureteral obstruction as it could improve renal function.ConclusionsThe onset of this case was insidious, and the diagnosis was difficult, with a poor prognosis. To date, only a handful of cases have been reported. We hope this case can provide some enlightenment for our clinical work.</p

Color Tuning of Core–Shell Fluorescent Microspheres by Controlling the Conjugation of Poly(<i>p</i>‑phenylenevinylene) Backbone

A series of poly­(<i>p</i>-phenylenevinylene) (PPV)-coated microspheres with varied fluorescent emission colors have been prepared by controlling the average length of the conjugated segments on the polymer backbone. A modified Wessling method was used for preparing PPV with different conjugation segments. The labile sulfonium groups of the initial polymer precursor of PPV (pre-PPV) were partly substituted by relatively stable methoxyl groups. A series of precursors with different degrees of substitution were prepared by controlling the time of reaction; these precursors were adsorbed onto the negatively charged substrate spheres. Subsequently, heterogeneous thermal treatment eliminated the sulfonium groups selectively to form the conjugated segments on the PPV backbone with varied average conjugation lengths. Under UV exposure, the as-prepared PPV-coated microspheres displayed emission colors ranging from blue to green; a 65 nm shift in the emission maximum was observed in the fluorescence spectra. The gradual color change in emission of spheres was also confirmed in a confocal microscopy study. Further characterizations indicated that these microspheres possessed clear core–shell structure, good monodispersity in size, smooth surfaces, uniform emission, and superior thermal and photo stability. Flow cytometry measurements indicated that these spheres have very different patterns of intensity combination from four-signal receiving channels. The simple method reported herein, which can effectively and efficiently tune the emission color of the fluorescent microspheres, is a promising approach for preparation of microspheres used as encoded signal carrier in flow cytometry and other high-throughput techniques